Entries |
Document | Title | Date |
20080196387 | Method and Device for Managing the Operation of a Nitrogen Oxide Trap, and Diagnosing its Ageing Condition - The invention concerns a method which consists in arranging a oxygen probe ( | 08-21-2008 |
20080196388 | METHOD AND APPARATUS FOR ACTIVATING A DIESEL PARTICULATE FILTER WITH ENGINE HEAT - An apparatus, including a diesel particulate filter, at least one sensor for sensing information associated with operation of an engine, an engine brake configured to brake the engine, and a controller electrically coupled to the at least one sensor and the engine brake, to determine if the engine is operating in a manner that does not generate enough engine heat to activate the diesel particulate filter, and if the engine is so operating, operate the engine brake so as to brake the engine to cause the engine to generate enough engine heat to activate the diesel particulate filter. An associated method is disclosed. | 08-21-2008 |
20080196389 | Soot filter regeneration software, methods and systems - One embodiment is a method including maintaining a count based upon an engine operating condition, determining a soot level based upon a characteristic of a diesel particulate filter, and requesting deSoot based upon the count meeting or exceeding a threshold, or the soot level meeting or exceeding a threshold, or both. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings. | 08-21-2008 |
20080202095 | Catalytic converter heating - The rate at which a catalytic converter heats up to its normal operating temperature range, (e.g., during a start up phase) is increased by applying an external load to an internal combustion engine. Applying the external load causes the engine to generate more heat, which can be used to reduce the time that it takes to bring the catalytic converter up to its working temperature. As a result, a reduction in emissions can be achieved. | 08-28-2008 |
20080202096 | Particulate regeneration and engine control system - A particulate regeneration system for an engine is disclosed. The particulate regeneration system may have a particulate filter configured to remove particulate matter from a flow of engine exhaust, and a diesel oxidation catalyst located upstream of the particulate filter to facilitate oxidation of the trapped particulate matter. The particulate regeneration system may further have a regeneration device located upstream of the diesel oxidation catalyst and configured to selectively heat the exhaust above an oxidation temperature of the trapped particulate matter, and a selective catalytic reduction device located downstream of the particulate filter to remove NOx from the engine exhaust. The particulate regeneration system may also have a controller in communication with the regeneration device and the engine. The controller may be configured to modify engine operation in response to initiation of a regeneration event. | 08-28-2008 |
20080202097 | Engine exhaust treatment system - An engine exhaust treatment system is provided. The system may include a catalyst-based device including a catalyst configured to reduce an amount of NO | 08-28-2008 |
20080209885 | SCAVENGING PHOSPHORUS, SULFUR, AND LEAD FROM COMBUSTION EXHAUST USING TUNGSTEN COMPOUNDS AND LUBRICANT - The present invention relates to an apparatus and method for delivering tungsten into a fuel combustion system or to the exhaust therefrom. By the present invention, tungsten from the lubricant or the fuel will interact with combustion products and, in particular, phosphorus, sulfur, and/or lead from the combustion products. In this manner, the tungsten scavenges or inactivates harmful materials which have migrated into the fuel or combustion products, and which can otherwise poison catalytic converters, sensors and/or automotive on-board diagnostic devices. The present invention can also lead to improved durability of exhaust after treatment systems. A lubricant in accordance with the present invention is also disclosed | 09-04-2008 |
20080216463 | Device for Removing Nitrogen Oxides From Internal Combustion Engine Waste Gas and Method for Dosing an Aggregate of Internal Combustion Engine Waste Gas - In a device and a method for removing nitrogen oxides from the exhaust of an internal combustion engine which is operated predominantly with an excess of air, the internal combustion engine is assigned an exhaust system having a nitrogen oxide reduction catalytic converter which comprises two catalytic converter parts, whose reducing agent filling levels can be determined. Metering of a reducing-agent-containing additive into the exhaust gas of the internal combustion engine takes place as a function of the reducing agent filling level of the first catalytic converter part and/or of the second catalytic converter part. | 09-11-2008 |
20080223018 | SUPPLYING TUNGSTEN TO A COMBUSTION SYSTEM OR COMBUSTION SYSTEM EXHAUST STREAM CONTAINING IRON - The present invention relates to an apparatus and method for delivering tungsten from a to a fuel combustion system or to the exhaust therefrom. By the present invention, tungsten from the lubricant or the fuel will interact with iron from the combustion process. In this manner, the tungsten scavenges or inactivates iron that can otherwise poison catalytic converters, sensors and/or automotive on-board diagnostic devices and/or reduce the operation of spark plugs. The present invention can also lead to improved durability of exhaust after treatment systems. Supplying tungsten acts to change the characteristics of iron deposits formed by combusting a fuel with iron. | 09-18-2008 |
20080229728 | Method and system for the simultaneous measurement of a plurality of properties associated with an exhaust gas mixture - A method for simultaneously measuring one or more properties (e.g. temperature, concentration of NO | 09-25-2008 |
20080229729 | CONTROL STRATEGY FOR LEAN NOx TRAP REGENERATION - A method for controlling regeneration of a lean NOx trap includes estimating an accumulated NOx in the lean NOx trap; determining whether the estimated NOx exceeds a first threshold value or a second threshold value; estimating the temperature of the lean NOx trap; determining whether the estimated temperature exceeds a threshold temperature; determining a desired air-fuel ratio for initiating a regeneration event, the desired air-fuel ratio being determined based upon the estimated NOx and the estimated temperature of the lean NOx trap; hastening the occurrence of a regeneration event when the estimated NOx exceeds the first threshold value through active control of engine operating regimes; and initiating a regeneration event when the estimated NOx exceeds the second threshold value or when the estimated temperature exceeds the threshold temperature by forcing homogenous operation of the engine at the desired air-fuel ratio. | 09-25-2008 |
20080236142 | Method and apparatus for exhaust gas purifying using hydrocarbon-selective catalytic reduction - There is provided a method and apparatus for exhaust gas purifying, especially NO | 10-02-2008 |
20080236143 | WASTE GAS PURIFICATION APPARATUS AND METHOD THEREFOR - A waste gas purification apparatus comprises a cooling unit including a cooling chamber containing a cooling fluid and a waste gas transmission pipe passing through the cooling chamber and immersing in the cooling fluid, which is used to cool the waste gas input into the waste gas transmission pipe; a dust eliminating unit provided at the downstream side of the cooling unit and used to eliminate harmful substances and dust contained in the waste gas; an absorbing unit provided at the downstream side of the dust eliminating unit and containing an absorbing fluid, which is used to eliminate carbon dioxide and sulfide contained in the waste gas by mean of the reaction between the absorbing fluid and the carbon dioxide and sulfide, in which the carbon dioxide and sulfide react with the absorbing fluid to generate precipitates; and a cleaning unit provided at the downstream side of the absorbing unit and containing a cleaning fluid, which is used to eliminate harmful substances and dust remained in the waste gas. A waste gas purification method is also provided. | 10-02-2008 |
20080245055 | APPARATUS AND METHOD FOR OPERATING AN EMISSION ABATEMENT SYSTEM - A method of operating an emission abatement system includes advancing a liquid agent to an atomizing nozzle and advancing pressurized air to the atomizing nozzle. The method further includes impinging the pressurized air on the liquid agent at a tip of the atomizing nozzle to shear liquid agent particles from the liquid agent. The method further includes advancing the liquid agent particles through the atomizing nozzle to an emission abatement device. An emission abatement system and atomizer apparatus are also disclosed herein. | 10-09-2008 |
20080264036 | Advanced engine control - A method for controlling an internal combustion engine to maintain a predetermined combustion efficiency, comprises: measuring the concentration of CO in an engine-out emission; determining whether the measured concentration of CO is above or below a target CO concentration for the engine under the operating conditions in use; and if the concentration of CO is above the target CO concentration, adjusting one or more engine and/or combustion parameters so as to reduce the concentration of CO in the engine-out emission, and if the concentration of CO is below the target CO concentration, adjusting one or more engine and/or combustion parameters so as to increase the concentration of CO in the engine-out emission; wherein the target CO concentration is determined on the basis of a correlation with indicators of combustion efficiency under known engine operating conditions. Exhaust gas recirculation (EGR) is one such engine and/or combustion parameter. A method for controlling an internal combustion engine to obtain an engine-out emission level of NOx within a predetermined concentration range is also described. The methods may be implemented by an engine control unit. | 10-30-2008 |
20080271434 | Method and apparatus for generating a reductant in an exhaust gas of a compression-ignition engine - A method and apparatus are provided for generating a reductant in an exhaust gas feedstream of a compression-ignition internal combustion engine upstream of a hydrocarbon-selective catalytic reduction catalyst. The method comprises injecting a quantity of fuel into the exhaust gas subsequent to a combustion event whereat a temperature of the exhaust gas is in a range of 670 K to 1100 K at a start of the injection. The generated reductant comprises an active species including an oxygenated fuel species. | 11-06-2008 |
20080282669 | PARTICULATE FILTER HAVING EXPANSIBLE CAPTURE STRUCTURE FOR PARTICULATE REMOVAL - A combustion engine comprising an exhaust system containing a particulate filter ( | 11-20-2008 |
20080282670 | LNT-SCR system optimized for thermal gradient - In an exhaust aftertreatment system, two LNTs having differing compositions are configured in series downstream from an inline fuel reformer. The downstream LNT is adapted for desulfation at higher temperatures than the upstream LNT. During desulfation, the system develops temperature gradients with the temperatures increasing in the direction of exhaust flow. The ordering of the LNTs is designed utilize these gradients. In a preferred embodiment, the system also includes two SCR catalysts having different compositions. The SCR catalyst with a composition adapted to tolerate higher temperatures is located nearer the downstream end of the system. | 11-20-2008 |
20080282671 | Electrically heated particulate filter propagation support methods and systems - A control system that controls regeneration of a particulate filter is provided. The system generally includes a regeneration module that controls current to the particulate filter to initiate combustion of particulate matter in the particulate filter. A propagation module estimates a propagation status of the combustion of the particulate matter based on a combustion temperature. A temperature adjustment module controls the combustion temperature by selectively increasing a temperature of exhaust that passes through the particulate filter. | 11-20-2008 |
20080289318 | Low Temperature Emission Control - A method of controlling an engine having a lean NOx trap in the exhaust is described. The method comprises during a first mode, at a first temperature, storing NOx at a lean condition and then purging stored NOx from the NOx trap at a rich condition without concurrently supplying oxygen to the trap during the purging and during a second mode, at a second, lower temperature, storing NOx at a lean condition and then purging stored NOx from the NOx, where an exothermic reaction is generated to temporarily raise the temperature of the trap by supplying oxygen and reductants with an overall rich mixture to the trap during the purging. | 11-27-2008 |
20080289319 | System and method for removing carbon dioxide from an atmosphere and global thermostat using the same - A system for removing carbon dioxide from an atmosphere to reduce global warming including an air extraction system that collects carbon dioxide from the atmosphere through a medium and removes carbon dioxide from the medium; a sequestration system that isolates the removed carbon dioxide to a location for at least one of storage and generation of a renewable carbon fuel; and one or more power supplying units that supply heat to the air extraction system to remove the carbon dioxide from the medium, at least one of the one or more power supplying units being a fossil fuel plant. | 11-27-2008 |
20080295483 | Method and system for maintaining aftertreatment efficiency - A method is provided for compensating for variability in ash accumulation rates within an aftertreatment element of an engine exhaust system. The method includes determining flow resistance values through the aftertreatment element and tracking minimum flow resistance values over time. The method also includes correlating the tracked minimum flow resistance values over time, with a model of engine oil consumption rate that is based on predetermined values for model engine oil consumption. The method further includes adjusting the predetermined values based on the tracked minimum flow resistance values over time. | 12-04-2008 |
20080295484 | Method and system for maintaining aftertreatment efficiency - A method is provided for compensating for factors affecting particulate matter accumulation within an aftertreatment element of an engine exhaust system. The method comprises determining rate of change of flow resistance through the aftertreatment element with time. Regeneration is periodically initiated to reduce particulate matter accumulation within the aftertreatment element. Rate of change of flow resistance through the aftertreatment element over time is correlated with at least a model of particulate matter accumulation within the aftertreatment element and a model of regeneration frequency of the aftertreatment element, based on predetermined values for particulate matter accumulation and regeneration frequency. Action, at least including increasing regeneration frequency, is initiated to compensate for an increased rate of particulate matter accumulation in the aftertreatment element. | 12-04-2008 |
20080295485 | Regeneration system - An regeneration system for use in a power system is disclosed. The regeneration system may include a source of intake air, an engine brake configured to reduce the speed of an engine by compression and release of the intake air, and a valve configured to divert a portion of the intake air to an auxiliary device. The regeneration system may further include a controller in communication with the engine brake and the valve. The controller may be configured to move the valve to reduce the portion of intake air diverted to the auxiliary device when the engine brake is active. | 12-04-2008 |
20080295486 | Exhaust treatment system implementing temporary engine control - An exhaust treatment system associated with a power source is disclosed. The exhaust treatment system may have a filter located to remove particulate matter from a flow of exhaust, and a regeneration device located proximal the filter. The exhaust treatment system may also have a fluid handling component located upstream of the power source to vary an amount of oxygen in the flow of exhaust, and a controller in communication with the regeneration device and the fluid handling component. The controller may determine a need for filter regeneration, and determine an adjustment to the fluid handling component required to provide sufficient oxygen in the exhaust flow for filter regeneration. The controller may further determine an effect the adjustment will have on operation of the power source, and determine an correction for the power source to account for the effect. The controller may substantially simultaneously implement the adjustment and the correction. | 12-04-2008 |
20080295487 | Method and Device for Operating an Internal Combustion Engine - An internal combustion engine has a plurality of cylinders and an exhaust tract into which a mixture which is situated in the respective cylinder is introduced in the respective discharge strokes. A combustion misfire rate is determined as a function of at least one operating variable of the internal combustion engine. A temperature in the exhaust tract is determined as a function of the combustion misfire rate. | 12-04-2008 |
20080307771 | Cold start white smoke aftertreatment protection - A method for cold start white smoke protection of a hydrocarbon after treatment device, and method of engine operation to effect the same. The method comprises a) determining the temperature of the hydrocarbon after-treatment device during cold start conditions; b) determining hydrocarbon emissions in the hydrocarbon after-treatment device; and c) modifying engine operating conditions to raise the hydrocarbon after-treatment temperature at a pre-determined rate to a temperature sufficient to permit controlled oxidation of the hydrocarbons in the hydrocarbon after treatment device. | 12-18-2008 |
20080314020 | Reduction of NOx Trap at Engine Shutoff - The reduction of a NOx trap upon engine shutdown is disclosed. One disclosed embodiment comprises detecting an engine shutoff, determining an engine stop position, and creating a reductive environment in the exhaust conduit upstream of the lean NOx trap at a time based upon the determined engine stop position. The creation of a reductive environment in the exhaust conduit upstream of the lean NOx trap may help to at least partially reactivate the lean NOx trap during engine shutoff. | 12-25-2008 |
20080314021 | METHOD TO RE-OPEN ASH FILLED CHANNELS IN DIESEL PARTICULATE FILTERS - A method for determining a time duration and an amount of fuel to include within exhaust gases to facilitate sintering of ash within a diesel particulate filter to reopen ash filled channels in said diesel particulate filter. | 12-25-2008 |
20080314022 | Strategy for scheduling LNT regeneration | 12-25-2008 |
20090000274 | CONTROL ORIENTED MODEL FOR LNT REGENERATION - A method of determining an amount of nitrogen oxides (NOx) stored in a NOx trap of an engine exhaust assembly may include determining a mass flow rate of NOx into the NOx trap, determining an efficiency of storing of the NOx within the trap, and calculating the amount of NOx stored in the NOx trap based on the determined mass flow rate and the determined efficiency. The method may further include determining a mass flow rate of a reductant entering the NOx trap, determining a relationship between the determined reductant mass flow rate and the NOx removed from the NOx trap, and calculating the amount of NOx removed from the NOx trap based on the determined mass flow rate and the determined relationship. The calculated amount of NOx stored may be adjusted by subsequent amounts of calculated NOx stored and subsequent amounts of NOx removed from the NOx trap. | 01-01-2009 |
20090019831 | Regeneration method for ceramic honeycomb structures - A method for regenerating a diesel particulate filter includes elevating a temperature of a gas stream flowing into an inlet of the diesel particulate fitter to greater than or equal to 450° of the inlet of the diesel particulate filter, wherein the gas stream at the inlet of the diesel particulate fitter contains an amount of NOx of equal to or greater than 300 ppm, and an amount of O | 01-22-2009 |
20090025367 | Physical based LNT regeneration strategy | 01-29-2009 |
20090031702 | Particulate filter - A filter includes a housing including an inlet and an outlet, and the housing includes a first section and a second section. The filter also includes a plurality of parallel channels defined by a plurality of porous walls within the first and second sections of the housing. The plurality of channels extend between the inlet and the outlet. The plurality of channels in the first section of the housing includes at least one first channel including an inlet stopper and at least one second channel including an outlet stopper. The plurality of channels in the second section of the housing including at least one open channel. | 02-05-2009 |
20090044514 | Particulate Filter Regeneration - In one example, a method of operating an engine having a diesel particulate filter in a vehicle, the particulate filter having a length and depth, includes performing particulate filter regeneration in response to temperature variation across the length and/or depth of the particulate filter. | 02-19-2009 |
20090056310 | Multi-Stage Regeneration of Particulate Filter - A method of regenerating a particulate filter in an apparatus comprising an internal combustion engine and a catalyst that employs urea as reductant for NOx is disclosed. The method comprises exposing the catalyst and particulate filter to a first, lower elevated exhaust temperature to remove urea deposits and/or stored hydrocarbon from the catalyst, and then exposing the catalyst and particulate filter to a second, higher elevated exhaust temperature to heat the particulate filter to decompose particulate matter in the particulate filter. In this manner, damage caused to the catalyst due to the decomposition and reaction of urea deposits and/or oxidation of stored hydrocarbon during particulate filter regeneration may be avoided. | 03-05-2009 |
20090056311 | Machine, engine system and operating method - A method of operating an engine system includes compressing intake air, restricting exhaust flow from the engine via a flow restriction device, and supplying compressor air to a compressed air subsystem of the engine during restricting exhaust flow. Supplying of compressor air may occur by selectively actuating a pressure control device to fluidly connect an inlet of a compressed air subsystem with the compressor. An associated machine and engine system include a compressor, a flow restriction device, a compressed air subsystem and a pressure control device to selectively fluidly connect the compressed air subsystem with the compressor when the flow restriction device is in a relatively more closed configuration. | 03-05-2009 |
20090071123 | PARTICLE FILTER ASSEMBLY - A particle filter assembly adapted to be mounted in an exhaust gas stream of an internal combustion engine. The particle filter assembly includes a wire mesh filter or sinter metal filter having a mesh size sufficiently small to prevent the passage of carbonaceous particles above a predetermined size through the mesh. The filter is positioned in series with the exhaust gas stream from the engine. A source of electrical power is electrically connected to the filter to heat the filter to a temperature sufficient to oxidize the carbonaceous material in the filter to carbon dioxide. | 03-19-2009 |
20090107111 | Implo-Dynamics.TM.: a system, method, and apparatus for reducing airborne pollutant emissions and/or recovering energy - Methods, systems, and apparatus for reducing or eliminating airborne pollutants and generating a measure of usable energy from the same are provided. The Implo-Dynamics™ Treatment System includes several embodiments for mixing steam and emissions and injecting said mixture into a process fluid transmission network. The vacuum induced flow of the Working Fluid provides a means of propelling a Hydro Turbine unit for energy recovery purposes. The process includes reactant injection, gas transfer, filtration, remediation of pollutants, and delivers a novel means for carbon dioxide capture and sequestration. Furthermore, the detoxified process by-product solids represent a beneficial reutilization and/or recycling resource. The methods and systems of the present invention include a comprehensive arrangement of process configurations and components as well as a means of operation. | 04-30-2009 |
20090120061 | Hydrocarbon Retaining and Purging System - Systems, methods, and computer readable storage media are described in which exhaust gas is routed to a hydrocarbon retaining device during starting, and purged to the engine intake manifold. Various alternative approaches are described for controlling operation and diagnosing degradation. Further, various interrelated configurations are described. | 05-14-2009 |
20090133382 | Electrically regenerated exhaust particulate filter for an engine system and operating strategy therefor - An exhaust particulate filter for an engine system includes an array of filter cartridges positioned within a shell, each of the cartridges having an electrically powered heating element coupled therewith. Exhaust gases are distributed among the cartridges according to a single distribution pattern, and the filter can be regenerated without diverting, dividing or bypassing exhaust gases from the filter. Other aspects include feedback control and feedforward control of regeneration based on sensing an electrical resistance property of each of the electrically powered heating elements. | 05-28-2009 |
20090139207 | Thermo-electric auxiliary power unit - An auxiliary power unit disclosed. The auxiliary power unit includes an exhaust passage configured to direct a flow of exhaust from a primary mover, a catalyst substrate disposed within the exhaust passage, and a heater configured to heat the catalyst substrate. The auxiliary power unit also includes a cooling jacket associated with the exhaust passage. The auxiliary power unit further includes a thermo-electric device disposed between the cooling jacket and the exhaust passage. The thermo-electric device is configured to generate electrical power from a temperature gradient created by the heater and the cooling jacket when the primary mover is non-operational. | 06-04-2009 |
20090139208 | METHOD FOR PREPARING A POROUS STRUCTURE USING SILICA-BASED PORE-FORMING AGENTS - The invention relates to a process for manufacturing a porous silicon carbide structure of the honeycomb type, said process being characterized in that it comprises the following steps: forming of a paste from a mixture of silicon carbide grains, the diameter d | 06-04-2009 |
20090139209 | Metering apparatus and method for operating it - In a metering apparatus for the metered introduction of a first medium into an exhaust gas system of an internal combustion engine, which includes a conditioning apparatus in which also a second medium is introduced via a dispensing apparatus which is connected to the conditioning apparatus and via which the first medium and the second medium are introduced into the exhaust gas system, a supply unit for supplying a third medium, which is different from the second medium in its physical properties and/or its chemical composition, is connected to the conditioning apparatus for cleaning of the conditioning apparatus and the dispensing apparatus from constituent parts of the first medium by the third medium or a mixture of the second and the third medium. | 06-04-2009 |
20090158706 | VARIABLE ENGINE OUT EMISSION CONTROL ROADMAP - A method for operating an internal combustion engine for variable engine out NOx control talking into account the age of the SCR. | 06-25-2009 |
20090158707 | ENGINE AFTER-TREATMENT CONTROLS USING DOSING BELOW CATALYST LIGHT-OFF TEMPERATURE - A method of controlling dosing of a hydrocarbon fuel into the exhaust gas of a combustion engine upstream of a particulate filter when the exhaust gas temperature into an oxidation catalyst upstream of a particulate filter has dropped below the light-off temperature of the catalyst. | 06-25-2009 |
20090173058 | SYSTEM AND METHOD FOR THE ON-BOARD PRODUCTION OF REDUCTANTS - A system is provided for the on-board production of reductants. The system comprises a fuel tank adapted to directly or indirectly supply a first fuel stream and a second fuel stream. An engine is in fluid communication with the fuel tank, and is configured to receive the first fuel stream and create an exhaust stream. The system further includes an emission treatment unit to treat the exhaust stream. A fuel conversion unit is configured to receive the second fuel stream, and also receive a stream comprising oxygen to partially oxidize at least a portion of the second fuel stream thereby forming reductants. In addition, the fuel conversion unit is configured to supply a reductant stream comprising the reductants to the exhaust stream. The invention further provides a method for the on-board production of reductants including supplying a first fuel stream to an engine, wherein the engine is configured to create an exhaust stream. A second fuel stream and a stream comprising oxygen are supplied to a fuel conversion unit. At least a portion of the second fuel stream is partially oxidized in the fuel conversion unit to form reductants, and a reductant stream comprising the reductants is supplied to the exhaust stream. The selective catalytic reduction of NOx present in the exhaust stream is performed. | 07-09-2009 |
20090178387 | REDUCING CO2 EMISSIONS FROM OILFIELD DIESEL ENGINES - A method of reducing CO | 07-16-2009 |
20090193790 | Method For The Regeneration Of A Particle Filter Installed In The Exhaust Gas Train Of A Vehicular Diesel Engine - A method for regenerating a soot-laden particle filter in the exhaust gas train of a diesel engine in a vehicle, wherein the engine is equipped with a fuel injection system having an injection valve for each cylinder and an exhaust braking device including a butterfly valve in the exhaust gas train upstream of the particle filter. An exhaust braking phase is initiated by closing the butterfly valve, thereby causing hot exhaust gas to be compressed upstream of the butterfly valve. Regeneration of the particle filter is then initiated by injecting diesel fuel into the cylinders substantially after the respective pistons pass top dead center, and allowing the hot exhaust gas mixture containing unburned fuel and air to flow past the butterfly valve so that the mixture ignites the soot and then supports combustion of the soot, thereby regenerating the particle filter. | 08-06-2009 |
20090199538 | FLUID TRANSFER SYSTEM AND METHOD - The present invention relates to a fluid transfer system and method for transferring fluid from a reservoir ( | 08-13-2009 |
20090199539 | COATING FOR PARTICULATE FILTERS - The invention relates to the coating of a particulate filter used in the treatment of exhaust or waste gases. In the manufacturing of the coating according to the invention, there is used a liquid-based sol, where the average particle size of the contained particles is below 100 nm, preferably below 50 nm. | 08-13-2009 |
20090199540 | METHOD FOR OPERATING A REAGENT METERING VALVE AND APPARATUS FOR CARRYING OUT THE METHOD - A method is proposed for operating a metering valve which is realized as a solenoid valve which is actuated by an electromagnet that interacts with an armature which is connected fixedly to a valve needle and, furthermore, is loaded with a pulse-width modulated metering signal which defines the metering of a reagent which is to be introduced into the exhaust-gas region of an internal combustion engine or of a preliminary stage of a reagent, as is an apparatus for carrying out the method. The opening duration of the metering valve is limited to a minimum opening duration, for which the metering valve is opened completely and which is fixed in such a way that a spray mist is always produced during the metering. The procedure according to this invention prevents the reagent from crystallizing and, as a result, firstly ensures exact metering of the reagent and secondly counteracts clogging of the metering valve, in particular if a urea/water solution is provided as preliminary stage of the reagent. | 08-13-2009 |
20090205315 | Apparatus and Method for PM Purification - The present invention provides an apparatus and a method for PM purification, where good PM purification performance can be achieved. The PM purification apparatus | 08-20-2009 |
20090205316 | System and processes for storing an additive and injecting it into the exhaust gases of an engine - System for storing an additive solution and injecting it into the exhaust gases of an internal combustion engine, the system comprising a tank for storing the additive and a rotary pump, a metering valve and an injector which are separate devices, this system making it possible to meter and inject the additive solution into the exhaust gases as is, without diluting it with a gas. In this system, the pump outlet pressure is regulated by adjusting the rotational speed of the pump. | 08-20-2009 |
20090211229 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NITROGEN OXIDE EMISSIONS IN A COMBUSTION ENGINE - An apparatus, system, and method are disclosed for reducing nitrogen oxide emissions in a combustion engine. The method includes a shift detection module determining an out of gear (OOG) indicator for a manual transmission. The method further includes an engine speed module determining an engine speed target based on at least one operating condition of the engine. The method continues with a load determination module determining an engine load target in response to the OOG indicator and an engine acceleration module determining a desired net torque based on the engine speed target and the engine load target. Finally, the method concludes with an emissions module determining a minimum fuel target based on the desired net torque and an actuation module generating a fueling signal to engage an engine fueling. | 08-27-2009 |
20090211230 | Method and Apparatus for Temperature Management in an Exhaust Gas Posttreatment System - A method of and apparatus for controlling the reducing agent in an exhaust gas aftertreatment system of an internal combustion engine with an exhaust gas duct in which an SCR catalyst is provided in the direction of flow of the exhaust gas. A reducing agent-generating system (RGS) comprising an NOx and CO/H2 production unit as well as a combined NOx storage/ammonia production unit in the standard gas path of the reducing agent-generating system. Ammonia is delivered upstream from the SCR catalyst to reduce nitrogen oxides, starting materials for producing the ammonia being fed at least in part to the NOx and CO/H2 production unit via a fuel inlet and an air inlet. An AGC matrix of the combined NOx storage/ammonia production unit is cooled at least intermittently by means of an inner and/or outer cooling device. Cooling results in the longest possible section of the running length (L) and thus the largest possible volume percent of the AGX matrix within the combined NOx storage/ammonia production unit having an optimum temperature range regarding the highest possible ammonia yield, which overall contributes to a great ammonia production rate. | 08-27-2009 |
20090241513 | Regeneration of Diesel Particulate Filters - Porous ceramic diesel particulate filters are regenerated to combust accumulated carbon particulates trapped therein through a controlled regeneration process wherein heat is input to the filter at a ramped or staged heating rate below that rate at which the particulate combustion process would proceed so rapidly and extensively that filter temperatures would be raised to filter-damaging levels. | 10-01-2009 |
20090255232 | EXHAUST GAS SUBSEQUENT TREATMENT METHOD AND METHOD THEREFOR - A method and device for treating exhaust gases of an internal combustion engine with a reducing agent introduced into the exhaust gases. The reducing agent is pumped out of a reactant reservoir and to a dosing valve so that after the dosing valve is opened, the reducing agent can be introduced into the engine's exhaust gas line in a dosed manner. Reducing agent can be conveyed back from the delivery device to the reservoir via a return line. The reducing agent can circulate between the delivery device and the reactant reservoir thereby, particularly when the dosing valve is closed, preventing the reactant from freezing. | 10-15-2009 |
20090260346 | METHOD FOR PURIFICATION OF AN EXHAUST GAS FROM A DIESEL ENGINE - A method for removing impurities in exhaust gas from a diesel engine, where the impurities comprise nitrogen oxides, carbon monoxide, particulate matter and incompletely combusted hydrocarbons. The method comprises the steps of injection of a reductant comprising urea or ammonia into the exhaust gas from the engine, selective catalytic reduction of the nitrogen oxides in the exhaust gas by the reductant, and intermittent injection of a hydrocarbon into this effluent. The succeeding steps are oxidation of carbon monoxide, particulate matter, incompletely combusted hydrocarbons and injected hydrocarbon to carbon dioxide and water, and in selectively oxidising possible excess of reductant to free nitrogen, and finally filtration of the effluent by passing the gas through a catalysed filter. The remaining particulate matter is retained in the filter, and the carbon monoxide, particulate matter and hydrocarbons are oxidixed to carbon dioxide and water, and the reductant is selectively oxidixed to nitrogen, creating a purified exhaust gas. | 10-22-2009 |
20090266050 | METHOD FOR CONTROLLING THE REGENERATION OF AN ELECTROSTATIC PARTICLE FILTER - A method for controlling regeneration of a particle filter by electrically heating the particle filter. According to the method, the regeneration is triggered by a calculator according to a loading level and temperature of the particle filter. The calculator simultaneously uses parameters relating to the operation of the vehicle so as to take into account the fuel consumption driven by the electrical heating of the filter. | 10-29-2009 |
20090266051 | Radiant Power from Pulsed Laser and Microwave for Eliminating Noxious Emissions of Hydrocarbon combustions - A method and apparatus for eliminating noxious products in the emissions of hydrocarbon combustions exhaust gases includes the combination of three forms of radiant energy production which all together and/or also separately concur to eliminate all the carbon particulates and the unburnt hydrocarbons, as well as the volatile gases (SOV) deriving from combustion processes of any kind. The three forms of radiant energy are: radiant energy by means of radiant tubes; radiant energy produced by bombarding the material by means of microwaves due to a quantum effect; and radiant energy created by pulsed laser rays properly sent upon a graybody. | 10-29-2009 |
20090277156 | Tank For A Reducing Agent, Motor Vehicle Having A Tank For A Reducing Agent And Method For Operating An SCR System Of A Motor Vehicle - A tank for a reducing agent which forms ammonia or which includes ammonia, has a planar first tank volume and at least one elongate second tank volume. A motor vehicle has an internal combustion engine, an exhaust system with an SCR catalytic converter and a reducing agent metering device and a body with a roof. A tank with a planar first tank volume for the reducing agent is provided on the roof. A method for operating an SCR system of a motor vehicle which has at least two tank volumes, a reducing agent metering device and an SCR catalytic converter, is also provided. | 11-12-2009 |
20090288392 | Engine system having particulate reduction device and method - An internal combustion engine system includes an engine having an engine housing. The engine system further includes an exhaust system, and a turbine disposed within the exhaust system. A particulate reduction device is disposed in the exhaust system upstream of the turbine. The particulate reduction device includes an exhaust retarder having a flow property which is based at least in part on a residence requirement for combustion of particulates in exhaust gases passing therethrough. The flow property may be a flow restriction property, and the exhaust retarder may include a flow restricting trapping element configured to trap particulates in the exhaust gases. The flow restricting trapping element defines a combustion efficacy to exhaust mass flow and temperature coefficient for the particulate reduction device which is based at least in part on a combustion initiating residence requirement for particulates passing through the particulate reduction device. | 11-26-2009 |
20090293450 | COLD-START CONTROL SYSTEMS FOR INTERNAL COMBUSTION ENGINES - A cold-start control system includes an air pump control module that controls an air pump and an engine starting module that starts an engine. The air pump control module activates the air pump to supply oxygen to a catalytic converter based on a temperature of the catalytic converter. The engine starting module starts the engine based on the temperature of the catalytic converter. | 12-03-2009 |
20090293451 | Exhaust control system having diagnostic capability - An exhaust control system for use with a combustion engine having a reduction catalyst and a supply of reductant is disclosed. The exhaust control system may have a first sensor located to generate a first signal indicative of an amount of a constituent within the exhaust entering the reduction catalyst, a second sensor located to generate a second signal indicative of an amount of the constituent remaining within the exhaust exiting the reduction catalyst, and a third sensor configured to generate a third signal indicative of an amount of reductant within the supply. The exhaust control system may additionally have a controller in communication with the first sensor, the second sensor, and the third sensor. The controller may be configured to determine a change in an efficiency of the reduction catalyst based on the first and second signals, and diagnose the change in efficiency based on the third signal. | 12-03-2009 |
20090308052 | METHODS OF INCREASING ACCURACY OF SOOT LOAD ESTIMATES - A method for improving the effectiveness of filters by increasing accuracy of an estimate of particulate matter loading remaining in the filter after cleaning. In one embodiment, the disclosed method includes removing soot from the DPF by cleaning, and measuring parameters for a set of predetermined criteria. The amount of soot present in the DPF is then estimated based on delta pressure. The resulting estimated soot load value accounts for the noise factors such as ash loading after extended operation. The value is then used to adjust for future measurements of soot loading in the DPF after subsequent regeneration treatments and/or used to diagnose the effectiveness of the cleaning. The method can also be applied to diagnostics of the DPF. When discrepancies between DPSLE and model-based soot load estimate are observed in healthy regenerations, failure modes such as plugged filter, extreme ash loading or substrate melting can be detected. | 12-17-2009 |
20090320449 | Pt-Pd Diesel Oxidation Catalyst with CO/HC Light-off and HC Storage Function - The present invention is directed to a diesel oxidation catalyst for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx). More particularly, the present invention is directed to a novel washcoat composition comprising two distinct washcoat layers containing two distinctly different ratios of Pt:Pd. | 12-31-2009 |
20100011743 | REGENERATION APPARATUS - A regeneration apparatus for a particulate filter of an exhaust gas system is provided which includes an exhaust gas duct and a catalyst which is integrated into the exhaust gas duct upstream of the particle filter. The exhaust gas system or the combustion engine includes an injection apparatus which is in communication with a fuel reservoir and is able to input fuel, in particular fuel containing hydrocarbons, into the exhaust gas flow. The regeneration apparatus includes a burner and at least one switching device. The burner is able to heat the catalyst to a reaction temperature at which an exothermic reaction of the fuel takes place. The switching device is able to activate and deactivate the burner and/or the injection apparatus selectively in dependence on an operating state of the exhaust gas system. An exhaust gas system for a combustion engine and a method for the regeneration of a particulate filter of an exhaust gas system are also provided. | 01-21-2010 |
20100024389 | NITROGEN OXIDE ESTIMATION DOWNSTREAM OF A SELECTIVE CATALYTIC REDUCTION CATALYST - A dosing control system comprises a selective catalytic reduction (SCR) analysis module, a dosing management module, an adjustment module, and an error module. The SCR analysis module estimates ammonia (NH3) stored by an SCR catalyst, a maximum NH3 storage capacity of the SCR catalyst, and a nitrogen oxides (NOx) measurement for a NOx sensor downstream of the SCR catalyst. The dosing management module controls dosing agent injection upstream of the SCR catalyst based on the maximum NH3 storage capacity and the NH3 stored. The adjustment module outputs an adjusted estimate of the NOx measurement based on the estimate of the NOx measurement, cross-sensitivity of the NOx sensor, and a delay period for exhaust flow. The error module selectively adjusts at least one of the NH3 stored and the maximum NH3 storage capacity based on a difference between the adjusted estimate and NOx measured by the NOx sensor. | 02-04-2010 |
20100024390 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST - According to one representative embodiment, an apparatus for reducing NO | 02-04-2010 |
20100024391 | Increasing exhaust temperature for aftertreatment operation - An internal combustion engine system includes: an engine with a plurality of pistons; a variable load driven by rotary power from the engine, the load including one or more of a pump, an air conditioner; and a fan; aftertreatment equipment to control exhaust emission from the engine; a sensor to provide a sensor signal corresponding to temperature of exhaust from the engine; and a controller coupled to the sensor and operable to regulate a regeneration operation of one or more components of the aftertreatment equipment. The controller responds to the sensor signal to generate one or more control signals to adjust the variable load to increase loading of the engine and correspondingly raise the temperature of the exhaust for the regeneration operation. | 02-04-2010 |
20100024392 | METHOD FOR HEATING A CATALYTIC CONVERTER ARRANGED IN AN EXHAUST-GAS REGION OF A COMBUSTION PROCESS, AND DEVICE FOR CARRYING OUT THE METHOD - An internal combustion engine is operated with direct fuel injection into the combustion chambers. Furthermore, the internal combustion engine is operated with sub-optimum ignition angle efficiency and an apportionment of a fuel quantity, which is to be injected before the start of a combustion, into at least two partial injections. A torque loss which results from the sub-optimum ignition angle efficiency and/or from the apportionment of the fuel to be injected is compensated by means of an increased charge of the combustion chambers. The fuel quantity and the charge are coordinated with one another in such a way that the air ratio lambda of the combustion chamber charges is greater than 1. The method is characterized in that a measure for a temperature of the catalytic converter, in particular a measure for the temperature at the inlet of the catalytic converter, is determined and in that a quantity of reducing exhaust-gas constituents is increased by means of at least one intervention into the control of the internal combustion engine if the measure for the temperature exceeds a predetermined temperature threshold value. The approach according to the invention permits rapid heating of the catalytic converter, wherein the hydrocarbon emissions when the catalytic converter is cold are at the same time as low as possible. | 02-04-2010 |
20100031632 | CATALYST DETERIORATION DETERMINATION DEVICE AND METHOD, AND ENGINE CONTROL UNIT - A catalyst deterioration determination device capable of determining whether or not fuel is high-sulfur fuel containing much sulfur content, and properly determining whether a catalyst is deteriorated while suppressing the frequency of execution of control for recovering the catalyst from the poisoned state to the minimum. The device determines whether or not a catalyst which purifies exhaust gases exhausted from an internal combustion engine is deteriorated based on the capacity of the catalyst for purifying exhaust gases. If it is determined that the catalyst is deteriorated, first sulfur elimination control is executed for eliminating sulfur content accumulated in the catalyst. Further, when the first sulfur elimination control is terminated, the deterioration determination of the catalyst is executed. Then, when it is determined by the deterioration determination that the catalyst is not deteriorated, it is determined that the fuel is high-sulfur fuel containing lots of sulfur content. | 02-11-2010 |
20100037591 | Method and Device for Purifying an Exhaust Gas Flow of a Lean-Burning Internal Combustion Engine - A method and device for purifying an exhaust gas flow of a lean-burning internal combustion engine, with a particle filter which stores particles both in rich and lean operation of the internal combustion engine and which has at least one catalytically active component on which in lean operation of the internal combustion engine defined exhaust gas components, in particular carbon monoxides and/or hydrocarbons are oxidized, the particle filter furthermore having at least one catalytically active component on which in rich operation of the internal combustion engine defined nitrogen oxides are converted into ammonia using hydrogen present in the exhaust gas flow, the ammonia being temporarily stored in at least one SCR catalytic converter which is connected downstream to the particle filter in the exhaust gas flow direction, and the SCR catalytic converter having at least one catalytically active component on which in lean operation of the internal combustion engine defined nitrogen oxides are reduced using the ammonia which has been temporarily stored in the SCR catalytic converter by selective catalytic reduction (SCR). | 02-18-2010 |
20100043399 | REDUCTANT INJECTION RATE SHAPING METHOD FOR REGENERATION OF AFTERTREATMENT SYSTEMS - The invention provides methods for regenerating pollutant storage and catalytic components of an internal combustion engine's exhaust gas aftertreatment system. These methods include introducing reductant in to catalytic components requiring regeneration in series of discreet portions during a Scheduled Regeneration Event. Typically the flow of exhaust gas to the catalytic component undergoing regeneration is at least partially reduced. | 02-25-2010 |
20100050597 | LOW TEMPERATURE UREA INJECTION METHOD - The invention relates to a method for injecting urea in an exhaust line of an engine ( | 03-04-2010 |
20100050598 | Catalytic Converter Apparatus - A catalytic converter apparatus for use in an exhaust system of an internal combustion engine includes a housing having a gas inlet and a gas outlet, and at least one catalytic substrate element disposed in the housing. The at least one substrate element is divided into a plurality of zones or sections, the zones at least partially separated from one another to inhibit heat flow. The zones can be at least partially separated with walls. The walls can include insulating material for reducing the mobility of heat radially outwardly. Each of the zones defines a generally separate flow passage connecting the inlet and outlet in fluid communication. The apparatus can heat more rapidly from a cold start compared with conventional catalytic converters. | 03-04-2010 |
20100050599 | Method and Device for Addition of a Reducing Agent in an Exhaust Gas Line of an Internal Combustion Engine of a Motor Vehicle - The invention relates to a method and a device for the addition of a reducing agent in an exhaust gas line of an internal combustion engine of a motor vehicle, with at least one NO | 03-04-2010 |
20100064662 | DIESEL CATALYST SYSTEM - A selective catalytic reduction system for reducing nitric oxides emission levels from a compression ignition engine includes a first reductant injector located upstream a first catalyst including a selective catalytic reduction coating. A second reductant injector is located downstream the first catalyst; and a second catalyst is placed downstream the second reductant injector and includes a selective catalytic reduction coating. | 03-18-2010 |
20100071346 | HYDROLYSIS CATALYST WITH LARGER DUCT CROSS-SECTIONS IN THE PERIPHERAL PORTION THAN IN THE CENTRAL PORTION, AND METHOD FOR HYDROLYSIS OF A URIC SUBSTANCE - A hydrolysis catalyst forming part of an exhaust system for a combustion engine for catalytically converting a uric substance to ammonia which can be used in a downstream SCR catalyst. The hydrolysis catalyst includes an active catalyst element with a central portion and a surrounding peripheral portion, both of which are lined with the same catalyst material. To ensure that injected urea, or other uric substance, which can become crystallised, does not cause blockages in the catalyst, the cross-sectional areas of separate ducts in the peripheral portion are larger than the cross-sectional areas of the separate ducts in the central portion. A method for hydrolysis of a uric substance by use of the catalyst and directing flow through the ducts of the peripheral portion upon blockage of ducts in the central portion. | 03-25-2010 |
20100077727 | CONTINUOUS DIESEL SOOT CONTROL WITH MINIMAL BACK PRESSURE PENATLY USING CONVENTIONAL FLOW SUBSTRATES AND ACTIVE DIRECT SOOT OXIDATION CATALYST DISPOSED THEREON - There is disclosed high cell density or tortuous/turbulent flow through monolithic catalyst devices for the direct catalytic, and (semi) continuous oxidation of diesel particulate matter. The catalysts relate to OIC/OS materials having a stable cubic crystal structure, and most especially to promoted OIC/OS wherein the promotion is achieved by the post-synthetic introduction of non-precious metals via a basic (alkaline) exchange process. The catalyst may additionally be promoted by the introduction of Precious Group Metals. | 04-01-2010 |
20100089032 | EXHAUST EMISSION PURIFICATION METHOD AND EXHAUST EMISSION PURIFICATION SYSTEM - In case of emergency regeneration, i.e. any one of forced regeneration after a judgment is made that purification is insufficient in purification judgment after ending forced regeneration, forced regeneration after time has expired before completing of forced regeneration, or forced regeneration when the pressure difference across a DPF exceeds a predetermined first judging pressure difference under a state where traveling distance of a vehicle is shorter than a predetermined distance for judgment an alarm for urging manual regeneration is issued, and wherein when manual regeneration is designated thereafter manual regeneration is performed and when predetermined conditions are satisfied without the reception of a designation of manual regeneration, automatic regeneration is performed. In forced regeneration of the DPF for purifying PM in exhaust gas, forced regeneration is performed surely even if manual regeneration is not selected at the time of emergency regeneration, and convenience is enhanced by reducing burden on a driver. | 04-15-2010 |
20100101210 | Method for Regenerating Soot Filters in the Exhaust Gas System of a Lean Mix Engine, and Exhaust Gas System Therefor - To adhere to legal exhaust-gas regulations, the exhaust gases of a lean-burn engine must be freed from soot particles and nitrogen oxides. It is proposed that the cylinders of the lean-burn engine be divided into two groups which discharge their exhaust gases into two associated exhaust lines which each comprise a soot filter and which are merged at an opening-in point into a common exhaust line. The common exhaust line comprises the catalytic converter for the removal of the nitrogen oxides. By regenerating the two soot filters at different times, the exhaust-gas temperature in the common exhaust line is limited to a mean temperature between the exhaust-gas temperature of normal operation and that of regeneration operation, and the catalytic converter for the removal of the nitrogen oxides is preserved. | 04-29-2010 |
20100101211 | Method of Supplying Iron to the Particulate Trap of a Diesel Engine Exhaust - The invention concerns a method for supplying iron, via the fuel, to the particulate trap of a diesel engine exhaust in a form suitable for promoting trap regeneration. The method involves the addition to the fuel of a defined colloid of iron oxide. Combustion of this colloid produces iron-containing compounds, especially iron oxides, which collect in association with carbonaceous particulate matter in the particulate trap, and function to promote the combustion of this matter. | 04-29-2010 |
20100101212 | EXHAUST GAS PURIFYING METHOD - A method of purifying an exhaust gas, includes: disposing a NOx trapping catalyst in an exhaust pipe of an internal combustion engine, the NOx trapping catalyst including: a metal substrate including cells, a corner portion of each of cells having an acute angle; and a catalyst layer supported in the metal substrate and including a noble metal, a heat-resistant inorganic oxide and a NOx trapping material, the catalyst layer having pores formed by addition of a pore formation promoting material, and the NOx trapping catalyst: adsorbing NOx in the exhaust gas when an exhaust air-fuel ratio is in a lean state; and desorbing and reducing the adsorbed NOx when the exhaust air-fuel ratio is in a stoichiometric state or a rich state; and removing the NOx by the exhaust air-fuel ratio being shifted between the lean state and the rich state. | 04-29-2010 |
20100107604 | AMMONIA GENERATOR, VEHICLE AND METHOD FOR GENERATING AMMONIA - The invention relates to an ammonia generator ( | 05-06-2010 |
20100107605 | PASSIVE AMMONIA-SELECTIVE CATALYTIC REDUCTION FOR NOx CONTROL IN INTERNAL COMBUSTION ENGINES - Engine exhaust gas feedstream NOx emissions aftertreatment includes a catalytic device connected upstream of an ammonia-selective catalytic reduction device including a base metal. Engine operation can be modulated to generate an engine-out exhaust gas feedstream that converts to ammonia on the catalytic device. The ammonia is stored on the ammonia-selective catalytic reduction device, and used to reduce NOx emissions in the exhaust gas feedstream. | 05-06-2010 |
20100107606 | PASSIVE AMMONIA-SELECTIVE CATALYTIC REDUCTION FOR NOx CONTROL IN INTERNAL COMBUSTION ENGINES - Engine exhaust gas feedstream NOx emissions aftertreatment includes a catalytic device and first and second ammonia selective catalytic reduction devices. The first and second ammonia-selective catalytic reduction devices each includes a base metal. Engine operation can be modulated to generate an engine-out exhaust gas feedstream that converts to ammonia. The ammonia is stored on the first and second ammonia selective catalytic reduction devices and used to reduce NOx emissions in the exhaust gas feedstream. | 05-06-2010 |
20100107607 | METHOD AND DEVICE FOR PRODUCING AMMONIA FOR THE EXHAUST GAS TREATMENT IN INTERNAL COMBUSTION ENGINES IN A MOTOR VEHICLE - A method for producing ammonia for treating exhaust gas in internal combustion engines in a motor vehicle proposes that the internal combustion engine is operated with an air/fuel ratio λ<1.0, and water is added to the air/fuel mixture supplied to the internal combustion engine in order to produce the ammonia required for treating the exhaust gas on board the vehicle. And in a device for implementing the method with a means for determining the air/fuel ratio λ of the air/fuel mixture supplied to the internal combustion engine, it is proposed that an addition means for adding water to the air/fuel mixture be provided in order to produce the ammonia required for exhaust gas treatment on board the motor vehicle, the addition means being controllable depending on the determined air/fuel ratio λ. | 05-06-2010 |
20100122520 | System for Controlling Urea Injection Quantity of Vehicle and Method Thereof - In a vehicle that is equipped with a selective catalytic reduction (SCR) device, the ammonia consumption amount is accurately predicted in the SCR catalytic convertor based on the ammonia amount consumed by NOx, and the absorbed ammonia amount is controlled to improve the purification performance of the NOx and responsiveness to a rapid variation of driving conditions such that the purification efficiency is enhanced. A method for controlling the urea injection amount of a vehicle may include calculating an entire consumption amount of ammonia that is necessary in an SCR catalytic convertor by applying an ammonia amount consumed by the NOx exhaust amount, an absorbed ammonia amount, an ammonia reaction ratio, an absorbed HC amount, and an deterioration, calculating a necessary urea amount by calculating a necessary ammonia amount corresponding to the calculated entire ammonia consumption amount, and injecting the necessary urea amount when the temperature of the SCR catalytic convertor is in a predetermined range. | 05-20-2010 |
20100154385 | THERMAL PROTECTION SYSTEM FOR REDUCING AGENT INJECTOR - An engine control system includes a temperature determination module, a reducing agent control module, and a control module. The temperature determination module determines a temperature of a reducing agent injector heated by an exhaust gas. The reducing agent control module actuates the reducing agent injector to inject an amount of reducing agent into the exhaust gas when the temperature is greater than or equal to a temperature threshold. The control module controls a concentration of nitrogen oxides in the exhaust gas based on the amount of reducing agent injected into the exhaust gas. | 06-24-2010 |
20100162686 | HYBRID VEHICLE AND METHOD FOR CONTROLLING SAME - A hybrid vehicle including an engine, a generator capable of generating power by being driven by the engine, an electric motor capable of running on power supplied from the generator, a power split device that transmits output from the engine to a driving wheel and the generator and also transmits output from the electric motor to the driving wheel, and a main ECU that controls an output ratio of the engine and an output ratio of the electric motor using the power split device according to the running state of the vehicle. When the operating mode of the engine is switched between a lean burn operating mode and a stoichiometric burn operating mode, the main ECU selectively increases and decreases the output ratio of the electric motor so that the total output, which is the combined output of the engine and the electric motor, is constant. | 07-01-2010 |
20100175369 | System for supplying a liquid for a vehicle and integrated pump/filter module - Supply system for a liquid comprising a liquid tank, a supply line, a pump, a filter and a device that makes it possible to purge the line, pump and filter and that comprises a non-return device preventing liquid from entering into these elements once they have been purged. In this system, the pump, filter and non-return device are combined in a compact module, the filter at least partly surrounding the pump and the non-return device being an integral part of a common housing that surrounds the filter and at least one part of the pump. | 07-15-2010 |
20100186371 | Method for Operating an Exhaust-Gas Catalytic Converter of an Internal Combustion Engine - Method and apparatus for operating an exhaust-gas catalytic converter ( | 07-29-2010 |
20100186372 | METHOD FOR REGENERATING A PARTICULATE FILTER OF AN INTERNAL-COMBUSTION ENGINE - A method for regenerating a particulate filter of an internal-combustion engine, provides for air to be supplied into the exhaust gas pipe upstream of the particulate filter in order to perform post-combustion in the exhaust gas pipe. The method provides for fuel to be supplied to the cylinders of the internal-combustion engine by means of a high-pressure pumping unit, and for fuel to be supplied into the exhaust pipe upstream of the particulate filter by means of the high-pressure pumping unit. | 07-29-2010 |
20100186373 | Exhaust Heating for Gensets - An electric power system includes a genset with an electric power generator, an internal combustion engine driving the electric power generator, and an electric heating device. This device may be used to selectively regenerate an exhaust treatment subsystem and/or to otherwise selectively increase load on the engine. In one application, the system is carried by a vehicle propelled by another engine. In another application, the system is structured to provide back-up power to an AC power bus, and is typically stationary. | 07-29-2010 |
20100186374 | Method for Heating an SCR System using Resistive Heating Elements - Method for heating a urea SCR system using at least two resistive heating elements (R | 07-29-2010 |
20100186375 | Layered Diesel Oxidation Catalyst Composites - Provided are diesel exhaust components where palladium is segregated from a molecular sieve, specifically a zeolite, in a catalytic material. In the catalytic material, therefore, there are at least two layers: a palladium-containing layer that is substantially free of a molecular sieve and a hydrocarbon trap layer that comprises at least one molecular sieve and is substantially free of palladium. The palladium is provided on a high surface area, porous refractory metal oxide support. The catalytic material can further comprise a platinum component, where a minor amount of the platinum component is in the hydrocarbon trap layer, and a majority amount of the platinum component is in the palladium-containing layer. Systems and methods of using the same are also provided. | 07-29-2010 |
20100199634 | EXHAUST TREATMENT SYSTEM IMPLEMENTING SELECTIVE DOC BYPASS - An exhaust treatment system for use with a power system is disclosed. The exhaust treatment system may have an SCR device ( | 08-12-2010 |
20100199635 | EXHAUST GAS PURIFYING SYSTEM - An exhaust gas purifying system includes: a NOx trapping agent ( | 08-12-2010 |
20100205935 | REDUCING COOKING OVER Ag/Al2O3 HC-SCR CATALYST - The present invention relates to a method of reducing coking over a AgZAl | 08-19-2010 |
20100205936 | EXHAUST GAS-PURIFYING APPARATUS AND EXHAUST GAS-PURIFYING METHOD - An exhaust gas purifying apparatus, including an NO | 08-19-2010 |
20100205937 | Method and system for injecting a liquid - Method for controlling an injector intended for injecting a pollution-control liquid additive into the exhaust gases of an internal combustion engine at a flow rate governed by a given frequency and opening time of the injector, the injector having a calibration curve that establishes, at given frequency, pressure, temperature and nature of the liquid, the amount of liquid injected during an opening of the injector as a function of the duration of this opening, this curve comprising at least one linear zone (calibration line) and a non-linear zone, said method being characterized in that in the linear zone the parameters of the calibration line are used and in the non-linear zone use is made of a set opening time and a variable frequency according to at least one calibration point established for this purpose. SCR system to which this method can be applied. | 08-19-2010 |
20100212289 | REGENERATION CONTROL METHOD FOR A PARTICLE FILTER - A regeneration control method for a particle filter of an internal combustion engine exhaust line determines operating data items of the particle filter, wherein the data items are at least one representative inside temperature T(t) of the filter at a time t, regenerates the filter by increasing the temperature thereof above a first combustion temperature threshold of a soot contained in the filter, and computes a time-varying parameter d | 08-26-2010 |
20100212290 | REDUCTANT DOSING SYSTEM HAVING ANTI-AERATION DEVICE - A reductant dosing system for a machine having an engine and an exhaust system is disclosed. The reductant dosing system has a tank configured to hold a reductant, a dosing arrangement, and a supply passage connecting the tank to the dosing arrangement. The reductant dosing system also has a purging arrangement configured to direct purge fluid to at least one of the dosing arrangement and the supply passage, and a valve configured to allow reductant to pass from the tank to the supply passage and to inhibit purge fluid from entering the tank. | 08-26-2010 |
20100212291 | METHOD AND DEVICE FOR REGULATING THE FUEL/AIR RATIO OF A COMBUSTION PROCESS - A method for regulating the fuel/air ratio of a combustion process which is operated alternatingly with excess air and air deficiency, and having at least one catalyst volume in the exhaust gas of the combustion process which stores oxygen when there is excess oxygen in the exhaust gas and gives it off when there is oxygen deficiency, in which method the oxygen charges into the catalyst volume taking place when there is excess air, and the oxygen discharges from the catalyst volume taking place when there is air deficiency determined, and in which the fuel/air ratio is regulated in a first control loop such that the sum of the oxygen charges and oxygen discharges determined in a predefined interval takes on a predetermined value, wherein the combustion process is operated using oxygen excess or oxygen deficiency, respectively, at least until these appear at an oxygen-sensitive Nernst probe downstream from the catalyst volume. | 08-26-2010 |
20100212292 | Assembly and Method for Introducing a Reducing Agent into the Exhaust Pipe of an Exhaust System of an Internal Combustion Engine - An assembly and method for introducing a reducing agent into an exhaust pipe of an exhaust system of an internal combustion engine, in particular of a motor vehicle includes a feed connector which opens into the exhaust pipe and has a wall; a feed device for reducing agents which opens into the feed connector; and a device that generates a gas flow which is additional to the reducing agent flow and lines the wall of the feed connector. | 08-26-2010 |
20100212293 | Palladium-Supported Catalyst Composites - Provided are catalyst composites that can be used in methods for treating exhaust gas from internal combustion engines, including diesel and gasoline engines, systems including such catalyst composites and methods of using the catalyst composites to treat internal combustion engine exhaust. The catalyst composites may provide diesel oxidation catalysts and three-way catalysts. A catalyst composite is provided which a catalytic material on a carrier, the catalytic material including a palladium component dispersed on a first support comprising at least 60% by weight of a zirconia component, and one or more rare earth oxides selected from the group consisting of lanthana, neodymia, praseodymia, yttria, the first support optionally containing no more than 15% by weight ceria, and being free of alumina. Layered catalyst composites having one or more washcoats on the carrier are also provided. | 08-26-2010 |
20100218484 | METHOD AND DEVICE FOR CONTROLLING AN SCR-EXHAUST GAS AFTER-TREATMENT SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A method for controlling an SCR-exhaust gas after-treatment system ( | 09-02-2010 |
20100223907 | Method For Adjusting the Metered Quantity of Reducing Agent For Selective Catalytic Reduction - A method for application in conjunction with an exhaust gas post-treatment system for metering an ammonia-releasing reducing agent into the exhaust gas stream of an internal combustion engine installed in a motor vehicle and operated with excess air. A control unit meters the quantity of reducing agent as a function of a stored model and during the operation of the internal combustion engine varies the metered quantity during certain operating phases and compares the change in the measured value of at least one NO | 09-09-2010 |
20100229530 | CONTROL DEVICE AND CONTROL METHOD FOR EXHAUST GAS PURIFICATION APPARATUS, AND INTERNAL COMBUSTION ENGINE EXHAUST GAS PURIFICATION APPARATUS - There are provided a control device and a control method for an exhaust gas purification apparatus that can prevent the actual adsorption amount from becoming excessively lower than the saturated adsorption amount and can prevent the reduction efficiency of the reduction catalyst from degrading even when the temperature of catalyst continues to shift to a low temperature side for a predetermined time or longer. The device includes: a temperature transition determining means for predicting a transition of the temperature of the reduction catalyst and determining whether or not the temperature of the reduction catalyst continues to decrease for a predetermined time or longer; a first injection controlling means for injecting the reducing agent according to a first target adsorption amount that is a smaller value than a saturated adsorption amount of the reducing agent corresponding to the temperature of the reduction catalyst if it is determined that the temperature of the reduction catalyst does not decrease continuously for a predetermined time or longer; and a second injection controlling means for injecting the reducing agent according to a second target adsorption amount that is a value larger than the first target adsorption amount and smaller than the saturated adsorption amount if it is determined that the temperature of the reduction catalyst continuously decrease for a predetermined time or longer. | 09-16-2010 |
20100229531 | APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING REDUCTANT DOSING IN AN SCR CATALYST SYSTEM - According to one representative embodiment, an apparatus for controlling reductant dosing in an SCR catalyst system having a reductant injection system configured to inject reductant into an exhaust gas stream includes a controller, an actual reductant dosing rate module, and a reductant doser compensation module. The controller is configured to determine a reductant dosing rate command representing a desired reductant dosing rate. The actual reductant dosing rate module is configured to determine a predicted actual reductant dosing rate based at least partially on the reductant dosing rate command. The reductant doser compensation module is configured to determine a modified reductant dosing rate command based at least partially on the predicted actual reductant dosing rate. The reductant injection system injects reductant into the exhaust gas stream at a rate corresponding to the modified reductant dosing rate command. | 09-16-2010 |
20100229532 | CONTROL UNIT AND CONTROL METHOD FOR REDUCTANT SUPPLY SYSTEM - There are provided a control unit and a control method for a reductant supply system, which are capable of reducing energy consumption by immediately stopping heating means in the case of entering an idling stop mode. A control unit which performs control of a reductant supply system includes an idling stop determination portion that determines whether an internal combustion engine is stopped by idling stop control that automatically stops the internal combustion engine, a heating means operation determination portion that determines whether the heating means provided in the reductant supply route that supplies the liquid reductant to the reductant injection valve is in operation, and a heating means control portion that stops operation of the heating means in a state where the internal combustion engine is automatically stopped and the heating means is in operation. | 09-16-2010 |
20100229533 | PEROVSKITE-TYPE COMPOUNDS FOR USE IN LEAN NOx TRAPS - An exhaust aftertreatment system for a lean-burn engine may include a lean NO | 09-16-2010 |
20100229534 | ADDITION VALVE CONTROL METHOD AND ADDITION VALVE CONTROLLER - To suppress clogging of an injection nozzle that supplies fuel to an exhaust passage of an engine, a controller executes intermittent addition of fuel from the injection nozzle. In executing the intermittent addition, the controller calculates a particulate discharge amount within the exhaust passage based on the engine operation state, and multiplies the exhaust gas temperature by the intake air rate to calculate the exhaust energy. Then, based on the particulate discharge amount and the exhaust energy, the controller calculates the amount of fuel to be added. | 09-16-2010 |
20100229535 | METHOD FOR REMEDIATING EMISSIONS - A method for remediating a NOx-containing lean diesel emission includes providing a LNT/SCR catalyst system including a SCR catalyst and a first and second LNT. The SCR catalyst is disposed downstream of the second LNT which is disposed downstream of the first LNT. The lean NOx-containing diesel emission is introduced to the first LNT with the NOx being absorbed on to the first LNT forming a substantially NOx-free lean diesel emission. An exotherm generating agent is introduced to the substantially NOx-free diesel emission between the first LNT and the second LNT to form a reactive lean diesel emission. The reactive lean diesel emission is introduced to the second LNT generating a quantity of heat effective for desorbing absorbed NOx. A reducing agent is introduced into the desorbed NOx between the second LNT and SCR catalyst. The desorbed NOx diesel emission is remediated in the SCR catalyst. | 09-16-2010 |
20100236219 | ENGINE-OFF AMMONIA VAPOR MANAGEMENT SYSTEM AND METHOD - A method of managing vapors generated from an ammonia-containing reductant delivery system for a vehicle is described. The method may include storing ammonia containing vapors generated in the reductant delivery system during engine-off and then purging said stored ammonia into an exhaust of the engine to react in a catalyst in the exhaust flow during engine operation. | 09-23-2010 |
20100236220 | EXHAUST EMISSION PURIFYING APPARATUS FOR ENGINE - A technology for purifying an exhaust emission from an engine is provided, in which a misjudgment caused by a time lag between the abnormality detection and an abnormality judgment is avoided, in the case where a plurality of abnormalities is judged on the aqueous solution of a reducing agent or the like. After a first abnormality judgment (Femp=1: the time t | 09-23-2010 |
20100242438 | EXHAUST GAS TREATMENT SYSTEM INCLUDING A FOUR-WAY CATALYST AND UREA SCR CATALYST AND METHOD OF USING THE SAME - The present invention is directed towards methods and systems for treatment of exhaust gas from an engine. In one embodiment, an exhaust gas treatment system for a diesel engine is provided. The system includes a urea selective catalytic reduction (U-SCR) catalyst in fluid communication with a diesel engine to receive an exhaust gas flow therefrom. The system also includes a four-way catalyst in fluid communication with the U-SCR catalyst to receive the exhaust gas flow therefrom, the four-way catalyst comprising a lean nitrogen oxide (NO | 09-30-2010 |
20100242439 | CONTROL UNIT AND CONTROL METHOD FOR REDUCTANT SUPPLY DEVICE - There are provided a reductant supply device and a control method for the reductant supply device, which can prevent heat damage of a reductant injection valve, and also prevent crystallization of urea solution due to excessive cooling of the solution reductant. | 09-30-2010 |
20100257842 | METHOD FOR DETECTING THE MINIMUM OPENING TIME OF A REDUCING AGENT FEED DEVICE IN AN EXHAUST GAS AFTERTREATMENT SYSTEM COMPRISING AN SCR CATALYST - In a method for adapting the reducing agent feed in an exhaust gas aftertreatment system having an SCR catalyst for removing nitrogen oxides from the exhaust gas of an internal combustion engine and at least one reducing agent feed device, the minimum opening time of the reducing agent feed device is determined during operation and while suspending nitrogen emission, carrying out the following steps: a) the opening time of the reducing agent feed device is gradually prolonged until b) a reducing agent-sensitive sensor in the exhaust gas aftertreatment system detects a reducing agent signal. An exhaust gas aftertreatment system is designed accordingly for carrying out the method and a device is designed for controlling an exhaust gas aftertreatment system. | 10-14-2010 |
20100257843 | Zoned Catalysts for Diesel Applications - An oxidation catalyst composite, methods and systems for the treatment of exhaust gas emissions from an advanced combustion engine, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx) from a diesel engine and an advanced combustion diesel engine are disclosed. More particularly, washcoat compositions are disclosed comprising at least two washcoat layers, a first washcoat comprising a palladium component and a second washcoat containing platinum and at least about 50% of the total platinum is located in the rear of the catalyst. | 10-14-2010 |
20100263353 | EXHAUST TREATMENT DEVICE HAVING FLOW-PROMOTING END CAPS - An end cap for an exhaust treatment device is disclosed. The end cap has a cylindrical housing with an axial direction, a radial direction substantially orthogonal to the axial direction, a first open end, and a second closed end opposing the first open end in the axial direction. The end cap also has an integral port member extending from an annular surface of the cylindrical housing. The integral port member has a central axis aligned in the radial direction, and an exterior surface of the integral port member tangentially connects to an exterior surface of the cylindrical housing. | 10-21-2010 |
20100263354 | Exhaust Aftertreatment System with Flow Distribution - An exhaust aftertreatment system has a side inlet flow diffuser and provides even flow exhaust distribution to an aftertreatment element. | 10-21-2010 |
20100269488 | Particulate trap system and method - A particulate trap system for an exhaust system of an internal combustion engine includes a monolithic wall-flow particulate trap having a plurality of contiguous porous walls, and a remotely actuated relief valve downstream of said trap for periodically creating a reverse pressure throughout the exhaust system upstream of the relief valve and including said trap. A reversing apparatus periodically creates a reverse pressure drop across a portion of the contiguous porous walls of said trap to dislodge accumulated particulate and cause a portion of the filtered exhaust gas to flow back through said portion of the contiguous porous walls to remove particulate therefrom. A control system actuates the relief valve and the reversing apparatus. In one embodiment the system is utilized on a vehicle and the reversing apparatus includes a relief valve that is also operative as an exhaust break. Regeneration includes the steps of: creating a backpressure in the entire exhaust system from a location downstream of the trap; creating a reverse pressure drop across only a portion of the porous walls to dislodge accumulated particulate therefrom; and causing a portion of filtered exhaust gas to flow back through said portion of the porous walls to carry the dislodged particulate out of the trap. | 10-28-2010 |
20100275579 | REMOVAL OF PARTICULATES FROM THE EXHAUST GAS OF INTERNAL COMBUSTION ENGINES OPERATED WITH A PREDOMINANTLY STOICHIOMETRIC AIR/FUEL MIXTURE - The exhaust gas of internal combustion engines operated with a predominantly stoichiometric air/fuel mixture contains, as well as the gaseous hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxide (NO | 11-04-2010 |
20100275580 | DIESEL ENGINE EXHAUST AFTER-TREATMENT OPERATOR INTERFACE ALGORITHM - A motor vehicle operator interface and control algorithm convey diesel particulate filter regeneration status to the operator. The algorithm also allows new control over heretofore automatic regeneration, through limiting the inhibit function. The DPF after-treatment operator interface provides multiple status indications to the operator. In a preferred embodiment this is effected using a switched indicator lamp. | 11-04-2010 |
20100281851 | EXHAUST GAS EMISSIONS REACTOR AND METHOD OF TREATING EXHAUST GAS - An exhaust gas emissions reactor and method of treating exhaust gas. The reactor has a housing for receiving exhaust gas from an engine. An oxidation catalyst is disposed in the housing for receiving exhaust gas from an inlet, and at least one mixing duct in the housing receives exhaust gas from the oxidation catalyst. An injector introduces reduction agent into the exhaust gas in the mixing duct, and at least one mixer effects mixing of exhaust gas and reduction agent. Disposed in the mixing duct downstream of the injector is an SCR catalyst for receiving exhaust gas/reduction agent mixture therethrough. Treated exhaust gas is conveyed to an outlet of the housing. | 11-11-2010 |
20100281852 | Filter Regeneration System and Method - A filter regeneration system for an internal combustion engine operable at an engine speed and having: a gas exhaust system for fluidly expelling exhaust gas at an exhaust gas temperature; and at least one filter arrangement in fluid communication with the gas exhaust system and configured to capture particulate in the exhaust gas. The regeneration system includes: a load generating arrangement in operable communication with the internal combustion engine and configured to modify the mechanical load on the internal combustion engine, thereby changing the exhaust gas temperature; and at least one controller in electrical communication with at least a portion of the load generating arrangement and configured to control at least one operating parameter of the load generating arrangement. A method of regenerating a filter arrangement is also disclosed. | 11-11-2010 |
20100287911 | EXHAUST GAS PURIFICATION SYSTEM AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification system which, in a wider temperature range, can reduce and remove nitrogen oxides in an exhaust gas by a reduction catalyst with the use of hydrogen as a reducing agent is provided. The exhaust gas purification system has an electronic control device ( | 11-18-2010 |
20100293924 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE, AND METHOD OF CONTROLLING INTERNAL COMBUSTION ENGINE - A control for an internal combustion engine in which it is determined whether a request for a turbo flow mode is output and whether there is a possibility that a catalyst may be deactivated. More specifically, it is determined whether a catalyst gas temperature is above a predetermined value. The predetermined value is set in advance so that when the catalyst gas temperature is equal to or below the predetermined value, the catalyst is deactivated. When it is determined that there is a possibility that the catalyst may be deactivated if exhaust valves are placed in the turbo flow mode, a retard amount in an ignition timing retard correction is determined. An ignition timing is calculated. It is permitted to switch a valve opening mode to the turbo flow mode. | 11-25-2010 |
20100300069 | CONTROL OF A MOTOR VEHICLE INTERNAL COMBUSTION ENGINE - The present invention relates to a method for operating a motor vehicle internal combustion engine having a controller for adjusting NOx emissions in the exhaust gas, wherein a NOx controller is combined with a combustion controller. A control unit of an internal combustion engine is further proposed, said control unit comprising first control means for performing cylinder pressure-based combustion control, and second control means for performing NOx control, wherein the first and second control means are linked to each other. | 12-02-2010 |
20100300070 | Systems And Methods For Controlling Temperature And Total Hydrocarbon Slip - Systems and methods for controlling temperature and total hydrocarbon slip in an exhaust system are provided. Control systems can comprise an oxidation catalyst, a particulate filter, a fuel injector, and a processor for controlling a fuel injection based on an oxidation catalyst model. Example system includes a virtual sensor comprising a controller for calculating and providing the total hydrocarbon slip to subsystems for after-treatment management based on modeling the oxidation catalyst. Example methods for controlling the temperature and the total hydrocarbon slip in an exhaust system include the steps of providing an oxidation catalyst model, monitoring a condition of the exhaust system, calculating a hydrocarbon fuel injection flow rate and controlling a fuel injection. The example methods further include the steps of determining an error in the oxidation catalyst model based on the monitored condition and changing the oxidation catalyst model to reduce the error. | 12-02-2010 |
20100300071 | METHOD AND CONTROL DEVICE FOR CONTROLLING A REGENERATION PROCESS OF AN EXHAUST GAS PARTICLE FILTER - The invention relates to a method ( | 12-02-2010 |
20100307132 | NOx PURIFICATION SYSTEM AND METHOD FOR CONTROL OF NOx PURIFICATION SYSTEM - When the operating state of an internal combustion engine ( | 12-09-2010 |
20100307133 | EXHAUST GAS CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE, AND METHOD OF CONTROLLING THE SAME - An exhaust gas control apparatus for an internal combustion engine includes a NOx adsorbent that is provided in an exhaust passage of an internal combustion engine, and that adsorbs nitrogen monoxide; an active oxygen supply device that supplies active oxygen to an area upstream of the NOx adsorbent; and a control portion that performs a first control that does not cause the active oxygen supply device to supply the active oxygen while exhaust gas flows to the NOx adsorbent at a time of cold start of the internal combustion engine, whereby the nitrogen monoxide is adsorbed by the NOx adsorbent, wherein the control portion performs a second control that causes the active oxygen supply device to supply the active oxygen after the first control is finished, whereby the nitrogen monoxide adsorbed by the NOx adsorbent is converted to a nitrate or a nitrate ion on the NOx adsorbent. | 12-09-2010 |
20100307134 | DEVICE AND METHOD FOR THE REDUCTION OF EMISSIONS - An emission reduction device which may be removably affixed to an engine's exhaust system. The device comprises a cylindrical carcass with a beveled opening in a diagonal line in its proximal part. A bobbin is affixed in the distal portion of the carcass. A cylindrical-shaped fibrous blanket may be inserted in the carcass and the fibrous blanket may be wrapped in a wire mesh. A second fiber mesh formed into a cone may be removably inserted in the cylindrical-shaped fibrous blanket with the larger diameter of the cone positioned proximally. | 12-09-2010 |
20100319317 | AMMONIA VAPOR STORAGE AND PURGE SYSTEM AND METHOD - A method of operating a reductant delivery and storage system of a vehicle, comprising of storing an ammonia-containing fluid in a first storage device, generating ammonia vapors in the first storage device and storing said generated ammonia vapors in a second storage device, purging said stored vapors from the second storage device to an exhaust of the engine, delivering said ammonia-containing fluid to said exhaust of the engine, and adjusting at least one of an amount of ammonia-containing fluid delivered and an amount of vapors purged to said exhaust based on the other of said at least one of said amount of ammonia-containing fluid delivered and said amount of vapors purged to said exhaust. | 12-23-2010 |
20100326051 | Operating and Diagnostic Method for an SCR Exhaust-Gas Aftertreatment System - The invention relates to In an operating and diagnostic method for an SCR exhaust gas aftertreatment system which has an SCR catalytic converter with ammonia storage capacity, a signal of an exhaust gas sensor that is sensitive to nitrogen oxide and ammonia and is arranged downstream of the SCR catalytic converter, is measured. In a normal operating mode, ammonia is supplied to the SCR catalytic converter corresponding to a filling level model for ammonia stored in the SCR catalytic converter, in such a way that the ammonia filling level of the SCR catalytic converter is held at least approximately at a predefinable nominal value (or value range). The normal operating mode is interrupted if an exhaust gas sensor signal that exceeds a predefinable first limit value, is registered, and the set urea dosing rate is increased by a predefinable degree in relation to the value provided in the normal operating mode. Thereafter, a return is made to the normal operating mode, or a switch is made to a diagnostic operating mode, as a function of the profile of the signal of the exhaust gas sensor. | 12-30-2010 |
20100326052 | METHOD FOR MONITORING AMMONIA STORAGE IN AN EXHAUST AFTERTREATMENT SYSTEM - A method for monitoring the ammonia-selective catalyst reduction device includes monitoring states of parameters of the exhaust gas feedstream upstream of the ammonia-selective catalyst reduction device, analytically segmenting the ammonia-selective catalyst reduction device into a plurality of discrete substrate elements, sequentially calculating a change in ammonia storage for each of the discrete substrate elements, and determining a total ammonia storage concentration on the ammonia-selective catalyst reduction device based upon the sequentially calculated change in ammonia storage for each of the discrete substrate elements. | 12-30-2010 |
20100326053 | METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE - An internal combustion engine with multiple cylinders and injection valves that are provided for the cylinders and that meter fuel also comprises an exhaust gas tract in which an exhaust gas catalytic converter is arranged. A characteristic value (OSC) of an oxygen storage capacity of the exhaust gas catalytic converter is determined. In accordance with the characteristic value (OSC), a heating measure (HM) for heating the exhaust gas catalytic converter is carried out. | 12-30-2010 |
20110000189 | DENOX OF DIESEL ENGINE EXHAUST GASES USING A TEMPERATURE-CONTROLLED PRECATALYST FOR PROVIDING NO2 IN ACCORDANCE WITH THE REQUIREMENTS - The adherence to future legally obligatory exhaust gas limit values for diesel vehicles in Europe, North America and Japan requires not only the removal of particles but also effective removal of nitrogen oxides from the exhaust gas (‘deNOx’). The ‘active SCR process’ is the preferred method for this. The nitrogen oxide conversions achieved by means of this process are particularly high when an optimal NO | 01-06-2011 |
20110000190 | METHOD AND APPARATUS FOR NO2-BASED REGENERATION OF DIESEL PARTICULATE FILTERS USING RECIRCULATED NOX - In a method for performing NO2-based regeneration of a diese! particulate filter (DPF) using recirculated NOx, the DPF is regenerated by oxidizing soot in the DPF with NO2 so that CO, CO2, and NO are formed, at least some NOx is recirculated from a takeoff point to a point upstream of the takeoff point. NO2 can be formed by reacting the recirculated NO with 02. During regeneration of the DPF, at least some of the NO2 that oxidizes soot in the DPF is recirculated ISI 02 or formed from recirculated NO that is reacted with 02 to form NO2. An exhaust aftertreatment system for performing NO2-based regeneration of a diesel particulate filter (DPF) using recirculated NOx is also disclosed. | 01-06-2011 |
20110000191 | EXHAUST GAS TREATMENT SYSTEM AND METHOD - In one aspect, the invention is directed an exhaust gas treatment apparatus that can be used to treat exhaust gas streams from vehicles having gasoline engines or diesel engines, from manufacturing plants, from incineration facilities, from coal fired stations, natural gas turbines or from virtually any exhaust gas stream. In one embodiment, the invention includes a particulate matter remover, a heat exchanger, a first reactor, a second reactor and a reagent protection device for preventing communication of reagent in the second reactor with ambient air. | 01-06-2011 |
20110005199 | Method for Reducing Emission of Nitrogen Oxide in a Motor Vehicle Having a Lean Burning Internal Combustion Engine - In a method for reducing the emission of nitrogen dioxide in a motor vehicle having an exhaust gas purification system having an SCR catalytic converter with adsorption centers for nitrogen oxides, an exhaust gas enriched with ammonia is supplied to the SCR catalytic converter above an operating temperature. Below the operating temperature, the exhaust gas supplied to the SCR catalytic converter is enriched with a material such that an adsorption of nitrogen oxides is inhibited at corresponding adsorption centers of the SCR catalytic converter. In order to reduce the overall NO | 01-13-2011 |
20110005200 | Catalyst System for the Reduction of NOx and NH3 Emissions - This catalyst system simultaneously removes ammonia and enhances net NOx conversion by placing an NH | 01-13-2011 |
20110005201 | EXHAUST GAS APPARATUS OF AN INTERNAL COMBUSTION ENGINE - The invention is an exhaust gas apparatus of an internal combustion engine, in particular of an internal combustion engine with gasoline direct injection. The exhaust gas apparatus includes at least one selective catalytic converter. It is provided that a first catalytic converter is positioned upstream of the selective catalytic converter. The invention also provides a method for the purification of exhaust gas of an internal combustion engine, in an internal combustion engine with gasoline direct injection, for use in such an exhaust gas apparatus. In the method the selective catalytic converter is preceded by a first catalytic converter disposed upstream therefrom. | 01-13-2011 |
20110011059 | EXHAUST GAS TREATING APPARATUS AND TREATING METHOD - An exhaust gas treating apparatus includes an adsorption tower ( | 01-20-2011 |
20110011060 | Exhaust Cooling Module for SCR Catalysts - An exhaust aftertreatment system having a NO | 01-20-2011 |
20110016848 | SYSTEM AND METHOD FOR TREATING DIESEL EXHAUST GASES - A system for treating diesel exhaust gases includes an engine for producing a diesel exhaust stream, a diesel particulate filter downstream of the engine and adapted to remove particulates from the exhaust stream, a heater upstream of the filter adapted to deliver energy in sufficient amounts to the exhaust stream to cause active regeneration of the filter, and a diesel oxidation catalyst upstream of the heater adapted to cause passive regeneration of the filter when the exhaust stream is above a light-off temperature of the diesel oxidation catalyst. A NOx reduction catalyst can be provided downstream of the heater. Methods for treating diesel exhaust gases are also disclosed. | 01-27-2011 |
20110030343 | SCR REDUCTANT DEPOSIT REMOVAL - An engine exhaust aftertreatment system including a selective catalytic reduction (SCR) system. The SCR system includes a reductant injection system configured to introduce a reductant into a exhaust stream of a engine, a SCR catalysts configured to reduce NOx in the presence of a reductant, and a SCR monitoring system configured to determine temperatures associated with the SCR system. The SCR system also includes a heat source configured to raise the temperature of the exhaust stream and a controller configured to operate the heat source to reach exhaust stream temperatures in the SCR system of at least about 400 degrees Celsius based on the temperature associated with the SCR system. | 02-10-2011 |
20110030344 | RADIANT HEATING SYSTEMS AND METHODS FOR CATALYSTS OF EXHAUST TREATMENT SYSTEMS - An exhaust treatment system comprises M three-way catalysts and N electrically heated catalysts (EHCs). The M three-way catalysts are arranged to receive exhaust gas output by an engine of a hybrid vehicle. M is an integer greater than one. The N EHCs are arranged to receive the exhaust gas and provide radiant heat to the M three-way catalysts when the N EHCs are powered. N is an integer greater than one. | 02-10-2011 |
20110030345 | METHOD FOR REDUCING NITRIC OXIDE IN THE EXHAUST GAS FLOW OF INTERNAL COMBUSTION ENGINES - A method is described for reducing nitrogen oxides in the exhaust gas flow of combustion engines, especially a motor vehicle internal combustion engine, wherein an air/fuel mixture in the combustion chamber of the combustion engine is combusted in the presence of a fuel additive and, in the process, the fuel additive decomposes and the exhaust gas flow is guided through at least one catalyst arranged downstream of the combustion chamber. This method is characterised in that a fuel additive is used, which decomposes in the combustion chamber releasing ammonia and the exhaust gas flow containing ammonia is guided through at least one SCR catalyst arranged downstream of the combustion chamber to reduce the concentration of the nitrogen oxides contained therein. The method according to the invention is highly effective in reducing the nitrogen oxide content in the exhaust gas flow of a combustion engine without an exhaust gas aftertreatment system having to be expensively formed and the installation space having to be increased. | 02-10-2011 |
20110030346 | Treatment System for Gasoline Engine Exhaust Gas - The present invention relates to a treatment system for a gasoline engine exhaust gas stream comprising a particulate filter, said particulate filter comprising: a particulate filter substrate, an inlet layer disposed on the exhaust gas inlet surface of the filter substrate, and an outlet layer disposed on the exhaust gas outlet surface of the filter substrate, wherein the inlet layer comprises Rh and/or Pd, and the outlet layer comprises Rh and/or a zeolite. | 02-10-2011 |
20110041477 | SYSTEM AND METHOD FOR CONTROLLING REDUCING AGENT INJECTION IN A SELECTIVE CATALYTIC REDUCTION SYSTEM - An engine control system includes a dosing control module and an offset determination module. The dosing control module actuates an injector to inject a first amount of reducing agent into exhaust gas produced by an engine during a period when a temperature of the exhaust gas is greater than a predetermined temperature threshold. The offset determination module determines an efficiency of a selective catalytic reduction (SCR) material based on measured amounts of nitrogen oxide (NOx) during the period and expected NOx amounts, wherein the measured amounts of NOx are measured at locations upstream and downstream from the SCR material, and wherein the expected NOx amounts are based on the temperature of the exhaust gas and the first amount of reducing agent. | 02-24-2011 |
20110041478 | Exhaust Gas-Aftertreatment Device and Control Method Thereof - The present invention relates to an exhaust gas-aftertreatment device and a control method thereof. More specifically, the invention relates to an exhaust gas-aftertreatment device, which employs a burner and a metal filter, so that the filter can be regenerated within a short time at high temperature, and wherein the burner is operated when the vehicle is idling, and wherein the filter can be efficiently regenerated by forming a flame in a stable manner using a dispersion means, and which furthermore has enhanced durability, and to a method for controlling the same. | 02-24-2011 |
20110047968 | Method and Apparatus for De-Sulfurization on a Diesel Oxidation Catalyst - A diesel exhaust after-treatment system ( | 03-03-2011 |
20110047969 | Post injection bucketing strategy to avoid hardware cavitation - An engine control system ( | 03-03-2011 |
20110047970 | HIGH EFFICIENCY NOx REDUCTION SYSTEM AND METHOD - An exhaust gas stream aftertreatment system and method achieves high efficiency NOx reduction in exhaust gas emissions by arranging a selective catalytic reduction (SCR) catalyst element upstream from a NOx adsorber catalyst. In an exemplary embodiment, a reductant is introduced into the exhaust gas stream, exposing the exhaust gas stream containing the reductant to a selective catalytic reduction (SCR) catalyst element, and exposing the exhaust gas stream that was exposed to the SCR catalyst element to a NOx adsorber catalyst element. The NOx adsorber catalyst element can be regenerated by temporarily reducing an oxygen concentration in an exhaust gas stream to reduce the λ of the exhaust gas stream. While the oxygen concentration is reduced, reductant is introduced into the exhaust gas stream at a rate that achieves a fuel-rich condition, and the fuel rich exhaust stream is exposed to the NOx adsorber catalyst element. | 03-03-2011 |
20110047971 | DOSING CONTROL SYSTEMS AND METHODS - A dosing control system for a vehicle includes a pump control module and an enabling/disabling module. The pump control module controls a pump that provides dosing agent to a dosing agent injector located upstream of a selective catalytic reduction (SCR) catalyst in an exhaust system. The enabling/disabling module disables the pump for a predetermined melting period after engine startup when the dosing agent is frozen and selectively activates the pump during the predetermined melting period to cool the dosing agent injector when a tip temperature of the dosing agent injector is greater than a predetermined temperature. | 03-03-2011 |
20110047972 | DEVICE AND METHOD FOR METERING A REDUCING AGENT INTO AN EXHAUST GAS SYSTEM OF A MOTOR VEHICLE - In an internal-combustion engine exhaust gas system, a storage tank stores the reducing agent, a supply pipe connects the storage tank to a metering unit which introduces the reducing agent into the exhaust gas system. A pump mechanism within the supply pipe conveys the reducing agent. A pressure sensor detects the pressure in the supply pipe downstream of the pump, and a pressure-releasing device has a return pipe connected to the storage tank and comes off the supply pipe. A first valve system is arranged in the supply pipe. A section of the return pipe is located at a higher level than the return pipe to form a storage volume for air present in the supply pipe. A second valve system is arranged in the supply pipe to create, when the second valve system is closed, a storage volume for pressurized reducing agent by way of this pipe branch. | 03-03-2011 |
20110047973 | APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING MULTIPLE DIESEL PARTICULATE FILTERS - According to one embodiment, an apparatus for controlling regeneration events on multiple diesel particulate filters (DPFs) of an exhaust after-treatment system includes a regeneration event synchronization module and regeneration event termination module. The regeneration event synchronization module is configured to simultaneously initiate a regeneration event on a first DPF and a regeneration event on a second DPF in response to a regeneration event request being triggered for one of the first and second DPFs. The regeneration event termination module is configured to terminate the regeneration event on the first DPF and the regeneration event on the second DPF. Under normal operating conditions, the termination of the regeneration event on the first DPF is performed independently of the termination of the regeneration event on the second DPF. | 03-03-2011 |
20110047974 | EXHAUST FLOW SEGREGATOR AND ASSOCIATED SYSTEMS AND METHODS - According to one embodiment, an exhaust gas after-treatment apparatus includes an exhaust tube through which a main exhaust gas stream is flowable. The exhaust tube defines an exhaust flow channel. The apparatus also includes an exhaust flow segregator positioned within the exhaust tube. The exhaust flow segregator separates the exhaust flow channel into a first channel through which a first portion of the main exhaust gas stream is flowable and a second channel through which a second portion of the main exhaust gas stream is flowable. Additionally, the apparatus includes an injector coupled to the exhaust tube. The injector is communicable in reductant injecting communication with the first portion of the main exhaust gas stream flowing through the first channel. The apparatus also includes at least one exhaust gas heater communicable in heat supplying communication with the first portion of the main exhaust gas stream flowing through the first channel. | 03-03-2011 |
20110047975 | HONEYCOMB STRUCTURE-TYPE CATALYST FOR PURIFYING EXHAUST GAS EXHAUSTED FROM AUTOMOBILE, METHOD FOR PRODUCING THE SAME AND METHOD FOR PURIFYING EXHAUST GAS USING THE SAME CATALYST - A catalyst for purifying exhaust gas, which is a relatively cheap three-way-catalyst containing noble metal components, and is capable of suppressing sintering of the noble metals even at high temperature, and purifying a carbon monoxide (CO), a hydrocarbon (HC) and a nitrogen oxide (NOx), and is superior, in particular, in purifying the nitrogen oxide, along with a method for purifying exhaust gas. This catalyst is provided by a honeycomb structure-type catalyst having a carrier made of a honeycomb-type structure, coated with a catalyst composition in two or more layers, for purifying a carbon monoxide, a hydrocarbon and a nitrogen oxide contained in exhaust gas, characterized in that; a catalyst layer (A) at the upper layer side comprises a palladium component supported with a heat resistant inorganic oxide, an oxygen storage release material and a barium component, and a catalyst layer (B) at the lower layer side comprises a rhodium component supported with a cerium-zirconium-type composite oxide having a cerium/zirconium ratio by weight of 0.05 to 0.2, as converted to an oxide, or the like. | 03-03-2011 |
20110056185 | Vehicle Reduced Emission Deployment - A reduced emission apparatus is coupled to a vehicle such that the vehicle is enabled to operate in a reduced emission mode by use of the reduced emission apparatus. A data acquisition apparatus is mounted on the vehicle and configured to acquire data relating to operation of the vehicle. Security may be provided for the reduced emission apparatus and vehicle-mounted data acquisition apparatus. The credits from operating the reduced emission apparatus apply to resources for deploying the reduced emission apparatus. | 03-10-2011 |
20110056186 | Exhaust Gas Purification Device - A method for controlling an exhaust gas purification device | 03-10-2011 |
20110056187 | METHOD FOR DECREASING NITROGEN OXIDES IN HYDROCARBON-CONTAINING EXHAUST GASES USING AN SCR CATALYST BASED ON A MOLECULAR SIEVE - The invention relates to a process for treating diesel engine exhaust gases comprising nitrogen oxides (NO | 03-10-2011 |
20110061364 | METHOD AND SYSTEM FOR UTILIZATION OF REGENERATIVE BRAKING ELECTRICAL ENERGY FOR OPERATING AUXILIARY SYSTEM IN AN OFF-HIGHWAY VEHICLE - Electrical power from a dynamic braking process in an off-highway vehicle is used to power an auxiliary system in the vehicle. The auxiliary system may be a urea storage container heating unit or a particulate filter regeneration heating unit. When dynamic braking electricity is unavailable, and to the extent the dynamic braking electricity is insufficient for powering the auxiliary system, electrical power from an energy device on board the vehicle is used to power the auxiliary system. The energy device may be an auxiliary energy storage device, devoted for use in powering the auxiliary system. | 03-17-2011 |
20110061365 | EXHAUST VALVE FOR A LARGE SIZED TWO STROKE DIESEL ENGINE, PROCESS FOR REDUCTION ON NOX-FORMATION IN SUCH AN ENGINE AND SUCH ENGINE - For reducing the NO | 03-17-2011 |
20110061366 | SYSTEM FOR EXHAUST GAS PURIFICATION AND METHOD OF CONTROLLING THE SAME - A system for exhaust gas purification ( | 03-17-2011 |
20110067382 | SYSTEM AND METHOD FOR NOX REDUCTION OPTIMIZATION - An engine controller determines the cost of operating a combustion engine and the cost of operating an emissions after-treatment device. Accordingly, the engine controller adjusts parameters for operation of the engine and the after-treatment device to ensure cost-effective use of the engine and the after-treatment device while complying with exhaust emissions requirements. In particular, the engine controller receives the price of fuel consumed by the engine and the price of reductant used by the after-treatment device to determine the respective cost of operation. Specifically, the fuel is diesel fuel used in a diesel engine; the reductant is urea use in a urea-based Selective Catalytic Reduction (SCR) system; and the regulated exhaust emissions is nitrogen oxide (NOx) emissions. The engine operating parameters may include cooled exhaust gas recirculation airflow, fuel injection timing, fuel injection pressure, and air-to-fuel ratio. The SCR system operating parameters may include the volume of urea injected. | 03-24-2011 |
20110072783 | SYSTEM AND METHOD FOR REGENERATING A PARTICULATE FILTER ACCOMPANIED BY A CATALYST - A system for filtering and oxidizing particulate matter produced by a gasoline direct injection engine is disclosed. In one embodiment, engine cylinder air-fuel is adjusted to allow soot to oxidize at an upstream particulate filter while exhaust gases are efficiently processed in a downstream catalyst. | 03-31-2011 |
20110072784 | SYSTEM AND METHOD FOR REGENERATING A PARTICULATE FILTER - A system for filtering and oxidizing particulate matter produced by a gasoline direct injection engine is disclosed. In one embodiment, engine cylinder air-fuel is adjusted to allow soot to oxidize at an upstream particulate filter while exhaust gases are efficiently processed in a downstream catalyst. | 03-31-2011 |
20110072785 | METHOD FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE IN CONNECTION WITH AN EXOTHERMAL REGENERATION OF AN EXHAUST GAS AFTERTREATMENT COMPONENT - A method is presented for controlling an internal combustion engine ( | 03-31-2011 |
20110078997 | Four-Way Diesel Catalysts and Methods of Use - Provided are catalyst articles, emission treatment systems and methods for simultaneously remediating the carbon monoxide, nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The emission treatment system of specific embodiment effectively treats diesel engine exhaust with a single catalyst article. | 04-07-2011 |
20110078998 | METHOD FOR OPERATING AN EXHAUST GAS AFTERTREATMENT APPARATUS - The present invention relates to a method for operating an exhaust gas aftertreatment apparatus ( | 04-07-2011 |
20110088371 | System And Method For Inhibiting Regeneration Of A Diesel Particulate Filter - A system and method for initiation and control of passive regeneration ( | 04-21-2011 |
20110094206 | REDUCTANT INJECTION AND DECOMPOSITION SYSTEM - According to one embodiment, a reductant injection apparatus includes an injector attachment portion to which a reductant injector is coupleable. The apparatus also includes a perforated tubular portion coupled to the injector attachment portion. The perforated tubular portion includes an inlet, an outlet, and a diverging sidewall extending from the inlet to the outlet. Additionally, a plurality of perforations is formed in the sidewall. A reductant spray can be injected into the perforated tubular portion via the inlet. Further, a portion of a bulk exhaust gas stream can be diverted into the perforated tubular portion through the plurality of perforations, through the perforated tubular element, and out of the perforated tubular portion through the plurality of perforations. The portion of exhaust gas stream can then be rejoined with the bulk exhaust gas stream downstream of the perforated tubular portion. | 04-28-2011 |
20110094207 | METHOD FOR CLEANING INTERNAL COMBUSTION ENGINE EXHAUST GASES - Described is a method for cleaning the exhaust gases of internal combustion engines, which method is suitable for reducing harmful gases and particle emissions. Here, the exhaust gas to be cleaned is conducted, under operating conditions, with a discontinuous profile of the air ratio λ across a wall-flow filter substrate which comprises a catalytically active coating containing one storage material. The storage material is suitable for temporarily storing one or more exhaust-gas components under certain operating conditions and releasing said exhaust-gas components again in a targeted fashion in the event of a suitable change in the operating conditions. The coating is configured such that the component has a gradient of the storage material concentration and/or of the total coating amount, with the highest concentration of the storage material in the longitudinal direction of the component being present on the inflow side. At least 60% by weight of the storage material in relation to its total amount is present in the walls between inflow and outflow ducts, and at least 50% by weight of the storage material in relation to its total amount is present in a first, inflow-side zone in the wall-flow filter substrate. | 04-28-2011 |
20110099974 | REDUCTANT SPRAY INJECTOR BOSS - A mounting boss ( | 05-05-2011 |
20110099975 | ARCHITECTURAL DIESEL OXIDATION CATALYST FOR ENHANCED NO2 GENERATOR - A device is described which provides thermally durable NO | 05-05-2011 |
20110099976 | EXHAUST SYSTEM - An exhaust system, may include a trapping filter, a nitrogen oxide purification catalyst to eliminate nitrogen oxide of the exhaust gas, an injector that selectively injects fuel in the exhaust line, a fuel cracking catalyst that is disposed between the injector and the trapping filter at the exhaust line, transforms the injected fuel to a reducing agent, and a control portion that controls the injector to inject a predetermined amount of the fuel for a predetermined time period so as to raise the temperature of the trapping filter to a predetermined regeneration temperature and eliminate the particulate material trapped in the trapping filter, wherein the control portion detects a degradation rate of the fuel cracking catalyst, and varies the predetermined regeneration temperature of the trapping filter depending on the degradation rate. | 05-05-2011 |
20110099977 | EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purification apparatus includes an exhaust passage through which exhaust gas discharged from an engine flows, a selective catalytic reduction catalyst provided in the exhaust passage, a urea water supply device for supplying urea water into the exhaust passage upstream of the selective catalytic reduction catalyst, a sensor responding to respective quantities of NOx and ammonia downstream of the selective catalytic reduction catalyst and detecting a value based on the response by the sensor, an exhaust gas recirculation passage through which a part of exhaust gas is refluxed to an intake system of the engine, an exhaust gas recirculation control valve for controlling amount of exhaust gas that is refluxed through the exhaust gas recirculation passage and a control device for controlling quantity of urea water supplied from the urea water supply device to the exhaust passage and also opening and closing of the exhaust gas recirculation control valve. The control device controls opening and closing of the exhaust gas recirculation control valve so as to increase or decrease the amount of exhaust gas refluxed through the exhaust gas recirculation passage for a predetermined period of time and also determines quantity of urea water based on change between the values detected by the sensor before and after changing opening and closing of the exhaust gas recirculation control valve. | 05-05-2011 |
20110099978 | REDUCTANT DECOMPOSITION SYSTEM - Described herein are various embodiments of a reductant decomposition system. According to one representative embodiment, the reductant decomposition system includes an exhaust gas chamber including an inlet and outlet. The system also includes a first exhaust gas distribution component positioned within the chamber and communicable in exhaust gas receiving communication with the outlet. The first exhaust gas distribution component causes swirling exhaust gas flow patterns within the exhaust gas chamber. Additionally, the system includes a second exhaust gas distribution component positioned within the chamber and communicable in exhaust gas providing communication with the inlet. The second exhaust gas distribution component includes features that cause a swirling exhaust gas flow pattern within a space defined by the second exhaust gas distribution component. Further, the system includes a reductant injector coupled to the exhaust gas chamber. The reductant injector is communicable in reductant injecting communication with exhaust gas within the chamber. | 05-05-2011 |
20110099979 | Composition and Method for Reducing NOx Emissions From Diesel Engines at Minimum Fuel Consumption - A diesel fuel composition is disclosed, as well as a method for reducing NOx emissions from a diesel engine at minimum fuel consumption wherein the diesel engine operates in a low temperature combustion mode, comprising the step of adding to the diesel engine at least one diesel fuel or blending component for a diesel fuel having a combination of a low T50 in the range of from 190° C. to 280° C., a high cetane number in the range of from 31 to 60, and an effective emissions reducing amount of a nitrogen-free cetane improver. | 05-05-2011 |
20110099980 | Method for Controlling Exhaust Gas Purification Device - Disclosed is a method for controlling an exhaust gas purification device, wherein the regeneration operation includes main regeneration operation for detaching the nitrogen oxides adsorbed onto the nitrogen oxide adsorbing material, the method comprising: operating the first combustion device and the second combustion device while the exhaust gas is prevented from flowing into the branch exhaust passage subjected to the regeneration operation by the switching of a changeover valve during the regeneration operation; and decreasing the flow rate of the first mixture gas as the stage of the main regeneration operation advances. | 05-05-2011 |
20110099981 | PROCEDURE AND DEVICE FOR CONTROLLING AN EXHAUST GAS PURIFICATION SYSTEM - A procedure for controlling an exhaust gas purification system of a combustion engine, consisting of one or several catalytic converters for converting and/or storing at least one exhaust gas component of an exhaust gas of the combustion engine at least one of the catalytic converters is construed as oxidization catalytic converter. With the aid of the adsorption capability of at least partially uncombusted hydrocarbons of one of the catalytic converters a diagnosing forecast about the NO oxidization of the catalytic converters is derived, whereby the at least partially uncombusted hydrocarbons are introduced into the exhaust gas duct at least partially in front of the catalytic converter. With the procedure and the device for implementing the procedure the NO oxidization capability of the involved catalytic converters can be evaluated in the range of extended on-board diagnosis requirements to provide “feed-gas” for subsequent exhaust gas after-treatment systems. | 05-05-2011 |
20110113751 | Method and Device for Determining a Dynamic Time Duration for Exhaust Gas Probes of an Internal Combustion Engine - An exhaust catalyst is charged with oxygen until saturated. A given first rich air/fuel ratio (LAM | 05-19-2011 |
20110113752 | Method for Operating an Exhaust Gas Treatment System Having an SCR Catalytic Converter - In a system with an SCR catalytic converter, a correction by a changeable long term adaption factor to a target dosing rate is provided for the model dosing rate and a correction by a changeable short term adaption factor to an assumed actual filling state for the ammonia filling level value. A dosing unit controllable by a control unit adds an ammonia-containing reducing agent to the exhaust gas and n exhaust gas enriched with ammonia according to the dosing is fed to the SCR catalytic converter. An ammonia filling level value for a filling level of ammonia stored in the SCR catalytic converter and a model dosing rate for dosing the reducing agent into the exhaust gas are calculated by a computer model. | 05-19-2011 |
20110113753 | Method for Operating an Exhaust Gas Treatment System Having an SCR Catalytic Converter - A method for operating an exhaust gas treatment system that includes an SCR catalytic converter is provided. Either a model-based filling level regulation for achieving the target filling level or a model-based efficiency control for achieving the target efficiency is performed according to presettable values for certain operating variables such as a temperature of the exhaust gas or of the SCR catalytic converter. | 05-19-2011 |
20110113754 | EXHAUST GAS PURIFICATION CATALYST, EXHAUST GAS PURIFICATION APPARATUS USING THE SAME AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification catalyst, which is suitable as a Three way catalyst for efficiently purifying carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO | 05-19-2011 |
20110120086 | Reductant addition in exhaust system comprising NOx-absorbent - An exhaust system for a vehicular lean-burn internal combustion engine comprises a NO | 05-26-2011 |
20110120087 | Apparatus with Catalyst for the Reduction of Nitrogen Dioxide (NO2) to Nitric Oxide (NO) by Chemical Means in a Diesel Catalytic Support - In setting tighter emissions standards for nitrogen oxides, legislative bodies limit the amount of nitrogen dioxide (NO | 05-26-2011 |
20110120088 | Mass Based Methods And Systems For Estimating Soot Load - Mass based methods and systems for estimating soot load in a filter of an after-treatment system for exhaust stream are provided. The after-treatment system can comprise a sensor, a filter, and a processor configured to estimate soot load in the filter based on a mass based multi-layer model. An example system includes a virtual sensor comprising an estimator for providing information corresponding to a filter outlet NO | 05-26-2011 |
20110120089 | EXHAUST PARTICULATE MANAGEMENT FOR GASOLINE-FUELED ENGINES - A thin layer of low mean-pore-size filter material that permanently accommodates the accumulation of exhaust particulates (as soot or a soot cake) is carried on a porous ceramic support. The supported filter material is closely coupled with the exhaust manifold of the engine, for the purpose of passive regeneration of stored particulates, and removes particulate matter from the exhaust which is directed through the filter layer and ceramic support. The oxygen content of the exhaust oxidizes the particulate matter on the filter material. In a preferred embodiment, a thin layer of the filter material is supported on inlet channel walls of a wall flow-through ceramic filter body to remove the particles from the exhaust. The filter body comprises an upstream exhaust gas flow inlet face with openings to a plurality of inlet channels and a downstream face with a like plurality of openings from outlet channels. The inlet channels are closed at the downstream face and the outlet channels are closed at the inlet face. So the exhaust stream enters the inlet channels and flows through the filter layers and supporting channel walls to an outlet channel. The filtered exhaust stream exits the outlet end of the filter body and is combined into an exhaust passage downstream of the filter body for further treatment as may be necessary. | 05-26-2011 |
20110120090 | Processes And Devices For Regenerating Gasoline Particulate Filters - Processes and devices for regenerating a gasoline particulate filter utilized in filtering an exhaust stream of a direct-injection gasoline engine operating at substantially stoichiometric conditions include introducing an amount of oxygen into the exhaust stream downstream of the engine and upstream of the gasoline particulate filter, and regenerating the gasoline particulate filter by passing the exhaust stream enriched with the amount of oxygen through the gasoline particulate filter. | 05-26-2011 |
20110120091 | METHOD AND APPARATUS FOR MONITORING THE LIGHT-OFF TEMPERATURE OF A DIESEL OXIDATION CATALYST - A method is provided for monitoring the light-off temperature of a diesel oxidation catalyst of a combustion engine. The method includes, but is not limited to measuring the temperature of the exhaust gas upstream and downstream of the diesel oxidation catalyst during a post injection phase or after injection phase of the combustion engine, determining whether a catalyst light-off occurred by using the temperature data of the exhaust gas, calculating the surface temperature of the diesel oxidation catalyst by using the measured temperature data of the exhaust gas, and defining the calculated temperature as light-off temperature of the diesel oxidation catalyst in the case that a catalyst light-off is determined. By means of the method, it is possible to determine the actual light-off temperature of the diesel oxidation catalyst for instance after each engine start by means of calculating the surface temperature of the diesel oxidation catalyst. Since the light-off temperature is not considered as a constant but as a changing variable, the aging of the diesel oxidation catalyst is sufficiently considered. Thus, it is provided a means for monitoring the light-off temperature of a diesel oxidation catalyst considering an aging of the diesel oxidation catalyst. | 05-26-2011 |
20110120092 | METHOD FOR CONTROLLING FLUID INJECTED QUANTITY IN A NOX REDUCTION SYSTEM EMPLOYING A SCR CATALYIST - A method is provided for controlling fluid injected quantity in a NO | 05-26-2011 |
20110120093 | PROCESS AND APPARATUS FOR PURIFYING EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE - The present invention relates to a process for purifying NO | 05-26-2011 |
20110120094 | METHOD OF REGENERATING AN EXHAUST GAS PURIFICATION FILTER, AND VAPORIZER - A method of regenerating an exhaust gas purification filter, in particular for internal combustion engines, uses a vaporized liquid that is to be introduced into the exhaust gas flow. A surface temperature of a heating element in a vaporizer chamber is limited to a maximum of 700 to 750° C. | 05-26-2011 |
20110126513 | Exhaust Purification System for Internal Combustion Engine and Desulfurization Method for the Same - An exhaust purification system for an internal combustion engine, and a desulfurization method for the same, recovers purification performance of a denitrification catalyst by removing sulfur poisoned at the denitrification catalyst in an exhaust system. The exhaust purification system may include an exhaust pipe through which an exhaust gas flows, the exhaust gas being generated at the internal combustion engine having a first injector injecting a fuel to a combustion chamber, a second injector mounted at the exhaust pipe and additionally injecting the fuel, a particulate filter mounted at the exhaust pipe downstream of the second injector and filtering particulate matters (PM) in the exhaust gas, a denitrification catalyst mounted at the exhaust pipe downstream of the particulate filter and reducing nitrogen oxide contained in the exhaust gas, and a control portion performing desulfurization of the denitrification catalyst when a desulfurization entering condition and a desulfurization condition are satisfied during regenerating the particulate filter. | 06-02-2011 |
20110126514 | Systems and Methods for On-Site Mixing and Dispensing of a Reducing Agent Solution for Use with a Diesel Catalytic Converter - Systems and methods for mixing and dispensing an aqueous urea solution at the point of delivery to diesel powered vehicles. A stand alone terminal or modular unit that mixes and dispenses the dilute solution on an as-needed batch basis. Each delivery terminal includes a dry or concentrated liquid urea reservoir, and a metering urea dispenser, along with a parallel demineralized water reservoir and a metering water dispenser. The demineralized water may be provided directly from an external source or the system may include a demineralizing component. The metered dispensing of the urea and the water into a mixing tank to produce the aqueous urea solution (AUS) is controlled through an electronic control system. From the mixing tank the system directs the solution through a sediment filtration system before retaining the mixed and filtered solution in a terminal holding and dispensing tank. | 06-02-2011 |
20110126515 | SENSOR-INTEGRATED DEVICE - The invention relates to a device for the qualitative and/or quantitative determination of at least one component of a chemically reducible gas mixture, an exhaust gas catalytic converter utilizing such a device, a vehicle including such a catalytic converter, a process for preparing such a device, a process for monitoring the NO | 06-02-2011 |
20110126516 | System and Method for Removing Particulate Matter from a Diesel Particulate Filter - A system is provided for removing particulate matter from a particulate filter, which includes at least one particulate filter unit. The system includes an engine controller coupled to each sensor and the engine, and a locomotive controller coupled to the engine controller. Each sensor continuously outputs a first alert signal to the engine controller, including the current load and the loading rate of one or more particulate filter units. The engine controller determines a projected load and projected loading rate of the one or more particulate filter units along the route, and a time gap or distance gap based on the trip plan along the route until the one or more particulate filter units are fully loaded. Additionally, the engine controller determines a time region or distance region within the respective time gap or distance gap filter unit, based on at least one of the current load, the loading rate, the projected load, the projected loading rate, and the time region or distance region. | 06-02-2011 |
20110126517 | CATALYST DETERIORATION DIAGNOSIS SYSTEM AND METHOD FOR INTERNAL COMBUSTION ENGINE - A catalyst deterioration diagnosis system performs a diagnosis of deterioration of the oxidation catalyst based on a high-temperature-inflow-condition exhaust gas temperature and a low-temperature-inflow-condition exhaust gas temperature. The high-temperature-inflow-condition exhaust gas temperature is a temperature detected by a temperature sensor while the temperature of the exhaust gas that flows into the oxidation catalyst is in a high temperature region H while the reducing agent is supplied from the reducing agent supply means into the exhaust gas that flows into the oxidation catalyst. The low-temperature-inflow-condition exhaust gas temperature is a temperature detected by the temperature sensor while the temperature of the exhaust gas that flows into the oxidation catalyst is in a low temperature region L while the reducing agent is supplied from a reducing agent supply means into the exhaust gas that flows into the oxidation catalyst. | 06-02-2011 |
20110126518 | Method for matching a particle filter temperature adjustment - The invention relates to a method for adjusting the temperature of a particle filter of an exhaust line ( | 06-02-2011 |
20110131949 | Reduction of Particulate, NOx, and Ammonia Emissions - A method for controlling emissions from an engine includes reducing trapped nitrogen oxides to ammonia on an LNT catalyst while concurrently oxidizing soot accumulated on the LNT catalyst, and, flowing the ammonia so formed to an SCR catalyst. | 06-09-2011 |
20110131950 | DIESEL PARTICULATE FILTER CONTROL - Methods and systems are provided for managing particulate emissions in an engine including a particulate filter and a CO | 06-09-2011 |
20110131951 | METHOD AND DEVICE FOR CONTROLLING THE REGENERATION OF A PARTICULATE FILTER - A method of controlling the regeneration of a particulate filter adapted to filter particulate matter present in exhaust emissions of an engine of a vehicle. The particulate filter is coupled to a heating device adapted to be activated so as to cause the heating of the particulate filter. The method includes sensing at least one operating parameter of the particulate filter, receiving sensed data relating to the at least one sensed operating parameter and conditioning the activation of the heating device based on a comparison of the received data with at least one respective threshold. The method further includes adjusting a value of the at least one threshold based on an operating condition of the vehicle, the operating condition being detected based on the received sensed data. | 06-09-2011 |
20110131952 | EXHAUST GAS PURIFYING SYSTEM AND EXHAUST GAS PURIFYING METHOD USING THE SAME - An exhaust gas purifying system ( | 06-09-2011 |
20110138776 | DIESEL ENGINE EXHAUST TREATMENT SYSTEM - A diesel engine exhaust treatment system is provided which includes a diesel oxidation catalyst and a diesel particulate filter, where a first SCR catalyst is positioned at the inlet of the diesel particulate filter, and a second SCR catalyst is coated on the filter. The first and second SCR catalysts each have a low loading, such that a lower backpressure is achieved over the use of a single SCR-coated diesel particulate filter at higher catalyst loadings. The exhaust treatment system also provides effective catalyst efficiency for removal of NO | 06-16-2011 |
20110138777 | DIESEL ENGINE EXHAUST TREATMENT SYSTEM AND METHOD INCLUDING A PLATINUM GROUP METAL TRAPPING DEVICE - A diesel engine exhaust treatment system and method is provided which includes a platinum group metal trapping device positioned between a diesel oxidation catalyst and an SCR catalyst. The platinum group metal trapping device traps trace amounts of platinum group metals which may be released from the diesel oxidation catalyst during engine operation and prevents them from accumulating on the SCR catalyst, preventing potential contamination of the SCR catalyst as well as ensuring that the performance of the SCR catalyst is uninhibited. | 06-16-2011 |
20110138778 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE - The invention relates to a method that is intended for operating an internal combustion engine of a motor vehicle and that flushes the temporarily unused injection valves with fuel for the purpose of preventing and/or removing deposits. In order to make possible in a simple way a complete conversion of the undesired exhaust gas constituents in a catalytic converter of an exhaust gas aftertreatment system of the internal combustion engine when the internal combustion engine is running, the invention proposes flushing the temporarily unused injection valves with fuel during an overrun mode of the internal combustion engine. | 06-16-2011 |
20110138779 | Determination of the Linear Correlation Between Signals, Which are Determined by Means of NOx Sensors, in an SCR Exhaust Gas Aftertreatment System - A measurement method is provided for an SCR exhaust gas aftertreatment system of a vehicle, where the SCR exhaust gas aftertreatment system includes a first NO | 06-16-2011 |
20110138780 | METHOD OF TREATING POLLUTANTS CONTAINED IN EXHAUST GASES, NOTABLY OF AN INTERNAL-COMBUSTION ENGINE, AND SYSTEM USING SAME - The present invention relates to a method of treating exhaust gas pollutants, notably of an internal-combustion engine, with a system comprising an exhaust line (L) with selective catalytic reduction catalysis means ( | 06-16-2011 |
20110138781 | METHOD FOR REMOVING COMPOUNDS CONTAINING SULFUR FROM FUELS - The present invention relates to a process for removing sulfur-comprising compounds from fuels, wherein a sulfur-comprising fuel is brought into contact with copper-1,3,5-benzenetricarboxylic acid MOF. | 06-16-2011 |
20110138782 | Particle Filter Arrangement - A particle filter arrangement for filtering exhaust gases of an internal combustion engine such as a diesel internal combustion engine, includes an inlet and an outlet and at least one particle filter arranged in the flow path of the exhaust gases between the inlet and outlet. The exhaust gases are conducted in a line, with the line having a first segment in which the exhaust gases are conducted substantially in the direction of the outlet. The line has a second segment in which the exhaust gases are conducted substantially in the direction of the inlet. An operating temperature of the arrangement sufficiently high to prevent full loading of the filter is generated particularly quickly in that the line also includes a third segment in which the exhaust gases are conducted substantially in the direction of the outlet. | 06-16-2011 |
20110146233 | REGENERATION ASSIST CALIBRATION - A power system comprising an engine that produces exhaust, a fuel system that injects a fuel into the engine, an aftertreatment system that treats the exhaust, and a controller. The aftertreatment system includes an oxidation catalyst that converts NO from the engine into NO2, a particulate filter that traps soot from the engine, and a sensor that provides an indication of the amount of soot in the particulate filter. The controller increases an engine fuel injection pressure when the amount of soot in the particulate filter is above a threshold. | 06-23-2011 |
20110146234 | POWER SYSTEM HAVING ADDITIVE INJECTOR - A power system is provided. The power system includes a power source configured to generate a flow of exhaust including particulate matter. The power system also includes a fuel supply line connecting a fuel supply and the power source, and being configured to direct a fuel flow from the fuel supply to the power source. An additive injector is configured to inject an additive into the fuel flow. An ionization device is at least partially disposed within the flow of exhaust, and is configured to apply a charge to the particulate matter and the additive. A particulate filter is configured to remove the particulate matter and the additive from the flow of exhaust. | 06-23-2011 |
20110146235 | ABNORMALITY DETECTION SYSTEM AND ABNORMALITY DETECTION METHOD FOR INTERNAL COMBUSTION ENGINE - When the NOx SCR catalyst ( | 06-23-2011 |
20110146236 | Exhaust Aftertreatment System - An exhaust aftertreatment system including an exhaust flow area, a first bank of one or more exhaust treatment devices in fluid communication with the exhaust flow area and a second bank of one or more exhaust treatment devices in fluid communication with the exhaust flow area. The first bank may be arranged in parallel with the second bank and inlet of the first bank is configured to provide greater flow resistance to the exhaust than the inlet of the second bank | 06-23-2011 |
20110146237 | EXHAUST GAS PURIFICATION SYSTEM FOR THE TREATMENT OF ENGINE EXHAUST GASES BY MEANS OF SCR CATALYST - An exhaust gas purification system (method and device) for the treatment of diesel exhaust gases containing nitrogen oxides and hydrocarbons is disclosed, which comprises the addition of ammonia or of a compound decomposable to ammonia into the exhaust gas stream and the subsequent leading of the exhaust gas stream over two successively arranged SCR catalysts with different properties and compositions. Both SCR catalysts are free of vanadium compounds and only the downstream SCR catalyst contains zeolite compounds. The exhaust gas purification system according to the invention is characterized by good “kick-off” behavior at low temperatures and a simultaneously high conversion performance over a wide temperature range. | 06-23-2011 |
20110146238 | METHOD AND APPARATUS FOR OPERATING AN INTERNAL COMBUSTION ENGINE - In a method and apparatus for operating an internal combustion engine, a lambda control is carried out, in which a trim regulation is provided, which operates with a P regulator component and an I regulator component. To prevent overshooting when the trim regulation is carried out, operation takes place in a first mode with compulsory adjustment and in a following second mode with increased regulator amplification factors. | 06-23-2011 |
20110146239 | METHOD FOR MONITORING A POLLUTANT CONVERSION CAPACITY IN AN EXHAUST GAS AFTERTREATMENT SYSTEM - The present invention relates to a method for monitoring a pollutant conversion capacity of a catalytically coated, oxidizing exhaust gas aftertreatment component ( | 06-23-2011 |
20110146240 | APPARATUS, SYSTEM, AND METHOD FOR MITIGATING DIESEL EXHAUST FLUID DEPOSITS AND ASSOCIATED CONDITIONS - According to one embodiment, described herein is an apparatus for mitigating on-board diagnostic (OBD) faults generated by an OBD system of an internal combustion engine (ICE) system having a selective catalytic reduction system with a diesel exhaust fluid (DEF) decomposition tube. The apparatus includes a fault mitigation module that is configured to monitor at least one OBD signal of the OBD system and issue a request for regenerating the DEF decomposition tube when a value of the at least one OBD signal reaches a predetermined regeneration threshold corresponding with the at least one OBD signal. The regeneration threshold is reachable prior to an OBD fault threshold corresponding with the at least one OBD signal. The apparatus also includes a regeneration module that is configured to regenerate the DEF decomposition tube according to the issued request. | 06-23-2011 |
20110146241 | METHOD FOR OPERATING A UREA-WATER SOLUTION METERING SYSTEM AND MOTOR VEHICLE USING THE SYSTEM - A method for operating a device for providing a liquid reactant to an exhaust gas system. The device includes at least one tank and an injection nozzle connected to one another by a line. The line has a pump for feeding the reactant. A controllable return line connected between the pump and the injection nozzle leads from the line to the tank. A controller controls operation of the injection nozzle, the pump and the return line, so that the reactant is only circulated intermittently through the controllable return line. A motor vehicle using the method is also provided. | 06-23-2011 |
20110162345 | METHOD AND APPARATUS FOR TREATING EXHAUST GAS - In an exhaust gas treatment, the amount of a highly corrosive mercury-halogenating agent to be added is reduced with the mercury-removing efficiency maintained high. | 07-07-2011 |
20110162346 | PROGRESSIVE CATALYST LOADING FOR INTEGRATED PARTICULATE FILTER AND SELECTIVE CATALYTIC REDUCTION UNIT - The present invention relates to an emission control system for reducing gases from the exhaust of a combustion engine. In at least one embodiment, the emission control system includes an exhaust passage for transporting the exhaust from the combustion engine, and a particulate filter and selective catalytic reduction (SCR/PF) unit disposed within the passage, with the unit having a plurality of spaced filter walls extending axially along the passage and selective catalytic reduction catalyst variably loaded on the unit to provide a more uniform pressure drop relative to a unit having uniformly loaded catalyst. | 07-07-2011 |
20110162347 | Synergistic SCR / DOC Configurations for Lowering Diesel Emissions - A motor-vehicle engine system comprises a first DOC configured to receive exhaust from an engine and an SCR device coupled downstream of the first DOC in a flow direction of the exhaust. The system further comprises a second DOC coupled downstream of the SCR device. The system takes advantage of hydrocarbon sorption in the SCR catalyst that is a function of temperature to enable reduced hydrocarbon emissions via oxidation at the second DOC. | 07-07-2011 |
20110162348 | ENGINE EMISSION CONTROL SYSTEM - Systems and methods are provided for reducing exhaust NOx species using a monolith substrate having a plurality of channels configured with radially varying cell density. The configuration enables radial reductant mixing, thereby improving mixing and atomization of an injected reductant with an exhaust gas stream. | 07-07-2011 |
20110162349 | EMISSION SCR NOX AFTERTREATMENT SYSTEM HAVING REDUCED SO3 GENERATION AND IMPROVED DURABILITY - The present invention relates to an emission treatment system for reducing gases from the exhaust of an engine. In at least one embodiment, the emission treatment system includes an exhaust passage for transporting the exhaust from the engine, a selective catalytic reduction (SCR) catalyst disposed within the passage, and an oxidation catalyst disposed in the passage upstream of the SCR catalyst, with the oxidation catalyst having metal, with at least 90 wt. % of the metal comprising palladium (Pd). | 07-07-2011 |
20110162350 | ENGINE AND EXHAUST AFTERTREATMENT CONTROL - A method of controlling an internal combustion engine and exhaust system having an SCR, and engine and exhaust system including an SCR, described herein, monitors, in real time, NOx conversion efficiency of an exhaust flow output by the internal combustion engine through the SCR. A determination is made as to whether the monitored NOx conversion efficiency exceeds a predetermined target conversion efficiency, such as a target based on a predetermined allowable amount of NOx emission. While the monitored NOx conversion efficiency exceeds the predetermined amount, the NOx concentration level in the exhaust flow is increased by an amount based on the difference in the monitored conversion efficiency and the predetermined target conversion efficiency. Another method and engine and exhaust system provided herein tracks an amount of ammonia stored on a catalyst of the SCR based on a feed-forward calculation of injected urea based on engine out NOx mass flow and reduction efficiency of the SCR catalyst based on a temperature of the SCR catalyst, and operates the engine and exhaust system in a NOx-rich mode in which an EGR fraction command is adjusted, based on the tracked amount of stored ammonia, to decrease an amount of EGR gas entering an intake of the internal combustion engine and thereby reduce ammonia stored on the SCR catalyst. | 07-07-2011 |
20110167796 | EXHAUST GAS AFTER-TREATMENT HAVING REDUCED RHODIUM DEPLETION - In a method for the after-treating of an exhaust gas from a preferably direct-injection and/or spark-ignition internal combustion engine, the exhaust gas is fed through a catalytic converter system connected downstream of the internal combustion engine. The system has at least one catalyst with a noble metal depletion having at least the elements palladium and rhodium which are present in a weight ratio of >5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 11:1, or 12:1. In the new European driving cycle, the catalyst exceeds a temperature T | 07-14-2011 |
20110167797 | PREVENTING CATALYST DAMAGE DURING MISFIRE EVENT - A control system includes a temperature determination module and a catalyst protection module. The temperature determination module determines a temperature of exhaust gas based on a resistance of a heating element of an oxygen sensor. The catalyst protection module adjusts an operating parameter of an engine to decrease the temperature of the exhaust gas when the temperature of the exhaust gas is greater than a threshold temperature. The threshold temperature is based on a temperature that damages a catalyst in an exhaust system. | 07-14-2011 |
20110167798 | SYSTEM AND METHOD FOR SEQUESTERING EMISSIONS FROM ENGINES - A system is provided for sequestering carbon dioxide emitted in exhaust gas from an engine. The exhaust gas may be cooled using heat exchange techniques, for example reverse flow heat exchangers. Carbon dioxide may be separated from the exhaust gases, for example using fractional distillation, heat exchangers, and turbo chargers. The separated carbon dioxide may be stored, for example using injection deep into the earth for enhancing natural gas and oil extraction. Alternatively, the separated carbon dioxide may be cooled to solid carbon dioxide and stored, for example, in an LNG tank for use as ballast onboard a ship or for use in industry. | 07-14-2011 |
20110167799 | NOx EMISSION REDUCTION SYSTEM AND METHOD - A method and system to reduce NO | 07-14-2011 |
20110167800 | EVEN-LOADING DPF AND REGENERATION THEREOF - A motor-vehicle engine system comprises an envelope configured to transmit exhaust. The envelope encloses a first array of filtration cells downstream of a second array of filtration cells. Each cell of the first array has one open end and one closed end. Each cell of the second array has one or two open ends. The system further comprises a fuel injector configured to increase a temperature in the envelope when soot is evenly distributed between the first and second arrays. | 07-14-2011 |
20110167801 | Method for Operating an Exhaust Emission Control System Having a SCR-Catalyst and an Upstream Oxidation Catalyst Exhaust Emission Control Component - A method for operating an exhaust emission control system of a motor vehicle internal combustion engine, in the exhaust gas line of which an oxidation-catalytically active exhaust emission control component is arranged upstream of a SCR-catalyst is provided. An ageing state of the oxidation-catalytically active exhaust emission control component is determined by correlating a hydrocarbon fraction present in the exhaust emission upstream of the oxidation-catalytically active exhaust emission component with a simultaneous nitrogen oxide conversion of the SCR-catalyst. | 07-14-2011 |
20110167802 | METHOD FOR OPERATING AN EXHAUST-GAS SYSTEM WITH LAMBDA CONTROL AND MOTOR VEHICLE HAVING THE SYSTEM - A method for operating an exhaust-gas system of an internal combustion engine having at least one particle separator and a catalytic converter, includes at least the following steps: a) carrying out processes in the internal combustion engine with lambda control about a control value; b) identifying a regeneration process of the particle separator; c) determining an oxygen demand for the regeneration process of the particle separator; and d) adapting the lambda control by the defined oxygen demand for a time period of the regeneration process of the particle separator. A motor vehicle having a spark-ignition engine and being suitable for carrying out the method, is also provided. | 07-14-2011 |
20110173950 | Emissions Treatment System with Ammonia-Generating and SCR Catalysts - Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines. | 07-21-2011 |
20110173951 | METHOD AND DEVICE FOR THE PURIFICATION OF DIESEL EXHAUST GASES - The invention proposes a method for the purification of exhaust gases which are generated by a diesel engine with a charging turbine, and a special device for carrying out said method. The device comprises, in the flow direction of the exhaust gas, a dosing device for a reducing agent from a reducing agent reservoir ( | 07-21-2011 |
20110173952 | METHOD FOR OPERATING POST INJECTIONS OF FUEL IN AN INTERNAL COMBUSTION ENGINE - A method is provided for operating an engine. The engine is configured to post inject a quantity of fuel into a combustion chamber and includes, but is not limited to a Diesel Oxidation Catalyst (DOC) that has an inlet and an outlet. The method includes, but is not limited to determining an open loop post injection quantity q | 07-21-2011 |
20110173953 | System And Method For Regenerating An Engine Exhaust After-Treatment Device - A system and method for regenerating a device in an engine exhaust after-treatment system is provided. To regenerate the device, a syngas stream is introduced into the engine exhaust stream and combusts in the presence of a catalyst in the after-treatment system, raising the temperature. A supplemental liquid fuel stream is then selectively introduced into and is vaporized by the syngas stream to form a combined fuel stream. Combustion of the combined fuel stream with the engine exhaust in the presence of the catalyst further heats the device bringing it to a temperature suitable for regeneration. The catalyst can be upstream of or within the device being regenerated. | 07-21-2011 |
20110173954 | MODULE INTEGRATING MIXER AND PARTICULATE SEPARATOR INTO A COMMON HOUSING AND AN ENGINE BREATHING SYSTEM HAVING THE MODULE - One exemplary embodiment includes a product including a housing that has a mixer portion and first, second and third openings. The first opening is configured to receive at least a portion of exhaust gases produced by an internal combustion engine, and the second opening is configured to receive intake air. The mixer portion is in communication with the first and second openings to mix the exhaust gases and the intake air into a gas mixture. The third opening is in communication with the mixer portion to flow the gas mixture therethrough. The invention further includes a particulate separator disposed within the housing. The particulate separator is configured to remove particulates from the exhaust gases. The product may be included in a low-pres sure EGR path and/or a high-pressure EGR path. | 07-21-2011 |
20110179771 | METHOD FOR REGENERATION OF DIESEL PARTICULATE FILTER IN AN EXHAUST AFTERTREATMENT SYSTEM OF AN IC ENGINE - A method for regenerating a DPF in an exhaust aftertreatment system includes the steps of: monitoring a temperature of exhaust associated with a DOC; retarding an injection of fuel into at least one combustion cylinder, and thereby intentionally causing a misfire in the at least one combustion cylinder, dependent on the monitoring step; increasing an outlet temperature of the exhaust from the DOC to a first threshold temperature; and oxidizing particulates within the DPF when the exhaust is at the increased temperature. The number and/or frequency of the misfires is controlled to provide the desired exhaust temperature at the DPF inlet. | 07-28-2011 |
20110179772 | Motor Vehicle Having a System for Feeding Fluid into Another Medium, Particularly for Feeding a Reducing Agent into the Exhaust Gas of an Internal Combustion Engine - In a system for feeding fluid into an exhaust gas after-treatment system, during operation fluid is fed via a feed line of the dispensing unit from a main container and is partially returned via a return line to the main container. A diaphragm pressure container is provided on the feed line downstream of a pump and a non-return valve toward the dispensing unit. During operation of the pump, the diaphragm pressure container is filled with fluid. The diaphragm pressure container is emptied as soon as the pump stops operating. In this way, the dispensing unit is cooled even after the operation of the system has ended, thereby protecting electronic components of the same from overheating. | 07-28-2011 |
20110179773 | METHOD FOR SELECTIVELY HEATING A REDUCING AGENT LINE AND DEVICE FOR EXHAUST GAS PURIFICATION IN A VEHICLE - A method for selectively heating a reducing agent line of an SCR device during operation of an exhaust gas purification system of an internal combustion engine and a device for exhaust gas purification, include a supply tank for a reducing agent for SCR applications, a device for introducing the reducing agent into an exhaust line of an internal combustion engine and at least one reducing agent line for fluidically connecting the supply tank to the device. | 07-28-2011 |
20110185704 | Device and Method for Purifying Exahust Gases for an Internal Combustion Engine - The invention relates to a device and a method for purifying exhaust gases for an internal combustion engine, with a multi-flow exhaust gas system having, at least in individual regions, several partial exhaust gas lines, and in which a NO | 08-04-2011 |
20110185705 | Device and method for removing carbon dioxide from motor vehicle exhaust - A method and device for removing a minor portion of carbon dioxide from the exhaust gases of a motor vehicle, wherein less than 20 percent of the carbon dioxide is removed, and further wherein exhaust flow is not impeded such that there is no significant reduction in efficiency of the motor itself. | 08-04-2011 |
20110185706 | METHOD FOR MANAGING THE REGENERATION OF A DIESEL PARTICULATE FILTER (DPF) IN A DIESEL ENGINE SYSTEM - A method is provided for managing the regeneration of a Diesel Particulate Filter (DPF) in a Diesel engine system. The engine having an intake and an exhaust line and being configured to after-inject or post-inject quantities of fuel into a combustion chamber for raising the temperature of the engine exhaust gas. The engine including in the exhaust line, but not limited to, a Diesel Particulate Filter (DPF). The method including, but not limited to identifying a faulty condition of the engine system and, in case that such faulty condition is not critical, measuring the intake air charge and, in case such intake air charge is acceptable, and performing a regeneration process for said Diesel Particulate Filter (DPF). | 08-04-2011 |
20110185707 | METHOD FOR ESTIMATING SLIPPAGE OF A SELECTIVE CATALYST REDUCTION SYSTEM - A method for determining NH | 08-04-2011 |
20110192138 | HC Adsorber with OBD Capability - A device and process for storing hydrocarbons as part of an exhaust emission control system and diagnosing the state of said device based on the incorporation of reactive metal species within the porous microstructure of the associated hydrocarbon adsorbent. | 08-11-2011 |
20110192139 | HYDROGEN COMBUSTION SYSTEM WITH CLOSED-CYCLE RECYCLING OF EXHAUST GAS AND METHOD THEREOF - Disclosed is a hydrogen combustion system with closed-cycle recycling comprising a hydrogen combustion system with closed-cycle recycling of exhaust gas, comprising: a hydrogen supplier 110 which supply hydrogen used as a fuel, a combustion chamber 120 which is located in the engine 130 and connected to the hydrogen supplying pipe 111 in which the hydrogen is combusted, a condenser 140 which converts the hot exhaust gas emitted through the discharge pipe 121 installed on the outlet of the combustion chamber 120 into the cold exhaust gas and condensed water, and a recycling pipe 150 which performs recycling of a part of the cold exhaust gas from the condenser 140 to the inlet of the combustion chamber 120. | 08-11-2011 |
20110192140 | PRESSURE SWIRL FLOW INJECTOR WITH REDUCED FLOW VARIABILITY AND RETURN FLOW - A reagent injector with a cartridge design has a body with a reagent inlet, outlet, and a swirl chamber, which has an exit orifice that may be covered and uncovered by a solid, movable pintle. Reagent flows through the injector when the exit orifice is covered and uncovered to cool the injector. An insulator may be disposed between the injector body and a mounting flange connectable to an exhaust system. A flow path ensures cooling of an electromagnetic actuator. Reagent may bypass an orifice swirl chamber when the pintle blocks the exit orifice. Fluid may flow between an outside diameter of a pole piece and an inside diameter of an electromagnetic actuator, through an orifice chamber and return through a central bore housing a solid pintle, around which fluid may flow. Different inner injector body passages may direct fluid into an orifice distribution chamber and out to the solid pintle. | 08-11-2011 |
20110192141 | EXHAUST SYSTEM COMPONENT HAVING A COMBINATION OF A HEAT EXCHANGER AND A CATALYTIC CONVERTER, MOTOR VEHICLE HAVING THE COMPONENT AND METHOD OF OPERATING THE COMPONENT - A component of an exhaust gas system for an internal combustion engine includes at least one housing with an inlet and an outlet for an exhaust gas and at least one inflow and one outflow for a medium. The component has a heat exchanger around which the exhaust gas can flow. The heat exchanger has a first thermal mass and a catalytic converter body through which the exhaust gas can flow. The catalytic converter body has a second thermal mass. A motor vehicle having a component and a method for operating a component, are also provided. | 08-11-2011 |
20110192142 | FILTRATION DEVICE FOR EXHAUST GASES - The filtration device ( | 08-11-2011 |
20110192143 | METHOD AND APPARATUS FOR COLD STARTING AN INTERNAL COMBUSTION ENGINE - The present invention relates to a method for achieving reduced emissions at cold start of an internal combustion engine having an exhaust gas after treatment system comprising at least one Diesel Oxygen Catalyst (DOC), at least one Diesel Particulate Filter (DPF) and a Selective Catalytic Reduction (SCR) unit, comprising the steps of: heating the DOC prior to cold starting said internal combustion engine, starting and controlling the internal combustion engine towards low NOx emission when said DOC has reached a predetermined temperature, optimizing the fuel consumption at a given total emission level when said DPF and SCR has reached a predetermined temperature. | 08-11-2011 |
20110203257 | DIESEL DOSING SYSTEM FOR ACTIVE DIESEL PARTICULATE FILTER REGENERATION - A diesel dosing module utilizes a diesel fuel shut-off valve, a diesel fuel dosing valve to provide dosing fuel to the inlet of a diesel oxidation catalyst and an air purge valve to purge fuel from a dosing line attached to the diesel dosing module and from a nozzle attached to a distal end of the dosing line. The valves are attached to a housing manifold which is remotely positionable from the nozzle and the high heat areas of the vehicle. | 08-25-2011 |
20110203258 | EXHAUST VALVE ACTUATION SYSTEM FOR DIESEL PARTICULATE FILTER REGENERATION - An exhaust valve actuation system ( | 08-25-2011 |
20110203259 | METHOD FOR CORRECTING AN ESTIMATE OF NH3 STORED WITHIN A SELECTIVE CATALYST REDUCTION SYSTEM - A method for correcting an estimated amount of NH | 08-25-2011 |
20110209459 | System and Method for Controlling Nitrous Oxide Emissions of an Internal Combustion Engine and Regeneration of an Exhaust Treatment Device - A catalyst composition is provided that includes a catalytic metal secured to a substrate, and the substrate is mesoporous and has pores that are templated. A catalyst composition includes a catalytic metal secured to a mesoporous substrate. The mesoporous substrate is a reaction product of a reactive solution, a solvent, a modifier, and a templating agent. A method for controlling nitrous oxide emissions including the catalyst composition comprising introducing a regeneration fuel into an exhaust stream upstream relative to the catalyst composition and heating the exhaust stream upstream relative to the catalyst composition. When the regeneration fuel is introduced the air λ of an air/fuel mixture of a lean burn exhaust does not exceed 1. | 09-01-2011 |
20110209460 | Systems And Methods For Determining A Particulate Load In A Particulate Filter - A method for regenerating a particulate filter may comprise calculating a soot layer state correction factor based on a rate of regeneration and a rate of particulate loading in the particulate filter and calculating an estimated soot load in the particulate filter based on a pressure drop of an exhaust gas flowing through the particulate filter and the calculated soot layer state correction factor. The method for regenerating the particulate filter may further comprise causing regeneration of the particulate filter when the estimated soot load is greater than or equal to a threshold value. | 09-01-2011 |
20110209461 | SYSTEM, METHOD, AND APPARATUS FOR DETERMINING AFTERTREATMENT FLUID QUALITY - A method includes determining a first NO | 09-01-2011 |
20110214412 | EXHAUST SYSTEM COMPRISING NOx STORAGE CATALYST AND CSF - An exhaust gas aftertreatment system for a diesel-engined vehicle, which system comprising a NO | 09-08-2011 |
20110214413 | CONFIGURATION AND METHOD FOR CLEANING AN EXHAUST GAS FLOW OF AN INTERNAL COMBUSTION ENGINE BY SEPARATING PARTICLES AND MOTOR VEHICLE HAVING THE CONFIGURATION - A configuration for purifying or cleaning an exhaust-gas flow of an internal combustion engine includes at least an ionization device, an agglomeration device, and a (catalytically active) radial honeycomb body around a duct. The exhaust-gas is diverted from the duct into the radial honeycomb body, while the agglomerated particles are caught in a particle separator of the duct. A method for purifying or cleaning an exhaust-gas flow of an internal combustion engine and a motor vehicle including an exhaust system having the configuration, are also provided. | 09-08-2011 |
20110219745 | METHOD AND APPARATUS FOR GASEOUS MIXING IN A DIESEL EXHAUST SYSTEM - A mixing device and method for a diesel exhaust system is disclosed having a chamber, a mixer within the chamber, and an injection tube supported on the mixer within the chamber. The mixer is positioned within the chamber adjacent an inlet and includes a plurality of angled blades to effect turbulent flow in a diesel exhaust stream entering the chamber through the inlet. The injection tube includes a plurality of injection points (e.g., openings) for discharging a reagent, such as gaseous ammonia (NH | 09-15-2011 |
20110219746 | SYSTEM, METHOD, AND APPARATUS FOR CONTROLLING AN AFTERTREATMENT SYSTEM HAVING A PARTICULATE FILTER AND A RICH NOX CONVERSION DEVICE - A system includes an internal combustion ignition engine with an exhaust gas flow, a particulate filter in the exhaust gas flow, a NO | 09-15-2011 |
20110219747 | CONTROL SYSTEM FOR DOSER COMPENSATION IN AN SCR SYSTEM - A method includes determining whether selective catalytic reduction (SCR) test conditions are present, and in response to the SCR test conditions being present, operating an SCR aftertreatment system at a number of reduced ammonia to NOx ratio (ANR) operating points. The method further includes determining a deNO | 09-15-2011 |
20110219748 | PARTICULATE MATTER PURIFYING MATERIAL, FILTER CATALYST FOR PURIFYING PARTICULATE MATTER USING PARTICULATE MATTER PURIFYING MATERIAL, AND METHOD OF REGENERATING FILTER CATALYST FOR PURIFYING PARTICULATE MATTER - A particulate matter purifying material is used for a filter catalyst for purifying particulate matter that is disposed in an exhaust gas flow path of an internal combustion engine, traps the particulate matter in exhaust gas generated in the internal combustion engine, and burns the particulate matter to be deposited, so as to be regenerated. The particulate matter purifying material includes an oxide containing cerium (Ce) having an oxygen storage-release capacity, and at least one metal (Me) selected from the group consisting of Zr, Y, La, Pr, Sr, Nb and Nd, wherein a content ratio (Ce:Me) of cerium to the metal is 6:4 to 9:1 in terms of an atomic ratio, and a degree of crystallinity (CR) represented by the following formula (1) is within a range of 25 to 60%: | 09-15-2011 |
20110225949 | METHOD AND APPARATUS FOR REGENERATING A PARTICULATE FILTER SYSTEM - A method for regenerating a particulate filter configured to treat engine exhaust gas in a vehicle equipped with an on-board navigation and an extra-vehicle communications system includes monitoring present operation of the vehicle, projecting vehicle operating conditions based upon information from the on-board navigation and the extra-vehicle communications system, monitoring a storage capacity of the particulate filter, executing a control scheme to regenerate the particulate filter when the storage capacity of the particulate filter exceeds an upper threshold, executing the control scheme to regenerate the particulate filter when the storage capacity of the particulate filter is less than the upper threshold and in response to an operator request to regenerate the particulate filter, and executing the engine control scheme to regenerate the particulate filter when the storage capacity of the particulate filter is less than the upper threshold and the projected vehicle operating conditions indicate an opportunity to regenerate the particulate filter. | 09-22-2011 |
20110225950 | Control strategy for heated fluid lines - A control strategy selectively controls the heating of fluid lines equipped with line heaters that may be utilized with a selective catalytic reduction system. The control strategy measures a tank temperature representative of reductant agent in a storage tank and a representative ambient temperature representative of an ambient temperature proximate the fluid line. The control strategy determines a lowest possible reductant agent temperature (“LPRAT”) based on the measured tank temperature and representative ambient temperature. The LPRAT is compared with a desired reductant agent temperature and, in response to the comparison, the control strategy may activate the line heater. | 09-22-2011 |
20110225951 | INTERNAL COMBUSTION ENGINE EXHAUST GAS CONTROL APPARATUS AND ABNORMALITY DETERMINING METHOD THEREOF - When it is estimated that an amount of oxygen stored in the catalyst is a maximum amount, an electronic control unit executes forced rich control and estimates a maximum oxygen release amount during a period between the start of this control and a rich reversal of an output of the oxygen sensor, based on this period of time. When it is estimated that the amount of oxygen stored in the catalyst is a minimum amount, the electronic control unit executes forced lean control and estimates a maximum oxygen storage amount during a period between the start of this control and a lean reversal of the output of the oxygen sensor, based on this period of time. If the absolute value of a difference between the maximum oxygen release amount and the maximum oxygen storage amount is equal to or greater than a predetermined value, an exhaust gas control apparatus and a method for determining an abnormality thereof determine that there is a response delay. | 09-22-2011 |
20110225952 | EXHAUST GAS PURIFICATION CONFIGURATION AND METHOD FOR EXHAUST GAS PURIFICATION USING A REACTANT - A configuration for purification of an exhaust gas flow of an internal combustion engine includes at least one exhaust gas line having an element for exhaust gas purification with a first end face and a second end face. The exhaust gas flows through the element from the first end face to the second end face. An adding device is provided downstream of the element for adding a reactant to the exhaust gas flow. The adding device is positioned at a distance of no more than 30 mm from the second end face of the element in such a way that at least part of the added reactant strikes the second end face of the element. A method for adding a reactant into an exhaust line during the operation of an internal combustion engine is also provided. | 09-22-2011 |
20110232263 | EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purifying apparatus for an internal combustion engine having a lean NOx catalyst in an exhaust system is provided. The lean NOx catalyst traps NOx in exhaust gases when the exhaust gases are in an oxidizing state, and discharges the trapped NOx when the exhaust gases are in an reducing state. In this apparatus, an estimated trapped NOx amount which is an estimated value of an amount of NOx trapped in the lean NOx catalyst, is calculated using a neural network. Engine operating parameters indicative of an operating condition of the engine are input, and the neural network outputs at least one control parameter which is relevant to the lean NOx catalyst. A reducing process of the NOx trapped in the lean NOx catalyst is performed according to the estimated trapped NOx amount. | 09-29-2011 |
20110232264 | FILTER ARRANGEMENT FOR EXHAUST AFTERTREATMENT SYSTEM - An auxiliary filter arrangement for an exhaust aftertreatment system, such as a diesel particulate filter (DPF) system. The DPF communicates with an exhaust line to receive a flow of exhaust gases therethrough. An auxiliary filter is positioned in an auxiliary line or tube that connects an air supply, a pressure sensor, and/or any other aftertreatment system component to the exhaust line. The auxiliary filter can be a wire mesh filter operable to trap particulate or soot, thereby preventing the soot from traveling further up the auxiliary line toward the components of the air supply system, the pressure sensor, and/or the components of any other aftertreatment system communicating with the exhaust line through the auxiliary line. | 09-29-2011 |
20110232265 | Approach for Detecting Reductant Availability and Make-Up - An engine system having a reductant delivery and storage system is described. In one example, a physical condition associated with a reductant storage device is correlated with a characteristic of a fluid stored in the reductant storage device to determine the availability and make-up of the stored fluid. In response, engine operation may be adjusted. | 09-29-2011 |
20110232266 | GASOLINE ENGINE WITH AN EXHAUST SYSTEM FOR COMBUSTING PARTICULATE MATTER - A gasoline engine having an exhaust system comprises means for trapping particulate matter (PM) from the exhaust gas and a catalyst for catalysing the oxidation of the PM by carbon dioxide and/or water in the exhaust gas, which catalyst comprising a supported alkali metal. The invention further includes a method of combusting PM from a gasoline engine in CO | 09-29-2011 |
20110232267 | METHOD AND DEVICE FOR THE ADDITION IN DROPLET FORM OF A LIQUID REDUCING AGENT INTO AN EXHAUST GAS LINE - A method and a device for the addition in droplet form of a liquid reducing agent to an exhaust gas line of an internal combustion engine, particularly to a rear end side of an exhaust gas treatment component, includes at least identifying at least one exhaust gas parameter during operation of the internal combustion engine, determining a size of a droplet of the reducing agent to be added as a function of an exhaust gas parameter, adjusting a first delivery pressure of the reducing agent toward the exhaust line as a function of the determined size of the droplet, and adding the reducing agent to the exhaust line with an adding unit. In this way, it can be achieved, in particular, that the end side of the exhaust gas treatment component is evenly wetted during operation of the internal combustion engine by using the droplets of the reducing agent. | 09-29-2011 |
20110239622 | EMISSION TREATMENT SYSTEM AND METHOD OF OPERATION - An emission treatment system is provided. The emission treatment system comprises a separation system and a selective catalytic reduction (SCR) catalyst. The separation system comprises a separator, a fuel inlet disposed to supply fuel to the separator, a first fuel outlet and a second fuel outlet respectively disposed to carry away fuel from the separator. The SCR catalyst comprises a catalyst composition comprising silver and templated metal oxide substrate. The emission treatment system is designed such that the separation system is configured to be in fluid communication with the SCR catalyst through the first fuel outlet during operation. A system including the emission treatment system and a combustion engine is also provided. Method of increasing NOx reduction efficiency of the SCR catalyst using fuel fraction is discussed. | 10-06-2011 |
20110239623 | REGENERATION STRATEGY FOR ENGINE EXHAUST - A method of regenerating a particulate filter of an exhaust system of an engine system is disclosed. The method may include determining a condition indicative of an accumulation of hydrocarbons in the particulate filter, and monitoring the particulate filter to determine when to initiate regeneration of the particulate filter. The method may also include selecting a regeneration profile for regeneration of the particulate filter based on the determined condition, and regenerating the particulate filter in accordance with the regeneration profile. | 10-06-2011 |
20110239624 | APPARATUS AND METHOD FOR REGENERATING AN EXHAUST FILTER - An exhaust gas treatment system for an internal combustion engine comprises an exhaust gas conduit in fluid communication with the internal combustion engine to conduct the exhaust gas between a plurality of exhaust treatment devices. A hydrocarbon injector in fluid communication with the exhaust gas delivers hydrocarbon thereto. A selective catalyst reduction device is disposed downstream of the hydrocarbon injector and is configured to receive and mix the hydrocarbon and exhaust gas and to reduce components of NO | 10-06-2011 |
20110239625 | METHOD AND DEVICE FOR ADAPTING THE INJECTION AGENT SUPPLY IN AN INJECTION SYSTEM, AND EXHAUST GAS AFTERTREATMENT SYSTEM - In a method and a device for adapting the injection agent supply for an emission control system, the following steps are carried out: a) setting of a agent pressure target value in the line upstream of the pump in relation to the ambient pressure; b) opening of the pressure relief valve for a predetermined time t; c) determining the pressure difference between the target and the injection agent pressure, caused in step b), immediately after step b); d) setting a target value for the agent pressure in the line downstream of the pump in relation to the exhaust gas pressure in the system; e) opening of the injector for a predetermined time t; f) determining the pressure difference between the target and the agent pressure, caused in step e), immediately after step e); g) comparing the pressure differences from steps c) and f); and h) optional adaptation of the injector opening time. | 10-06-2011 |
20110239626 | Diesel Particulate Control - A method and apparatus are provided for reducing emissions of particulates from diesel engines. Exhaust is passed through a diesel particular filter having at least two stages comprised of (a) a catalyst section having a platinum group metal catalyst on contact surfaces within the catalyst section and (b) a filter section comprised of passages effective to remove particulates from a moving stream of combustion gases generated by combusting the fuel in the engine and holding them therein to permit their oxidation. Carbon removal is enhanced by utilizing levels of platinum group metal composition, cerium compositions, fuels and/or optional chemical enhancers to generate NO | 10-06-2011 |
20110247316 | METHOD OF CONTROLLING UREA DOSING IN AN EXHAUST SYSTEM OF A VEHICLE - The present application relates to a method of controlling urea dosing in an exhaust system of a vehicle. The method includes adjusting the urea dosing based on the severity of urea deposition on an SCR catalyst, where the urea dosing is reduced as the severity increases. | 10-13-2011 |
20110247317 | CATALYST TEMPERATURE ESTIMATING DEVICE AND CATALYST TEMPERATURE ESTIMATING METHOD - A catalyst temperature estimating device that estimates the temperature of an upstream end of a catalyst for purifying exhaust gas of an internal combustion engine in an exhaust gas flow direction by executing a smoothing process for upstream end temperature estimation; the temperature of a downstream end of the catalyst in the exhaust gas flow direction by executing either a downstream end temperature estimation process using the estimated upstream end temperature with a smoothing process for downstream end temperature estimation; and calculates a smoothing coefficient for the estimated downstream end temperature used to smooth the estimated downstream end temperature based on the operation state of the internal combustion engine. | 10-13-2011 |
20110252765 | EXHAUST THROTTLE VALVE SYSTEM AND METHOD FOR DIESEL PARTICULATE FILTER REGENERATION - An exhaust gas aftertreatment system ( | 10-20-2011 |
20110252766 | METHOD OF PRODUCING AMMONIA EFFECTIVE TO CONTROL AFTERTREATMENT CONDITIONS OF NOx EMISSIONS - A method for reducing NOx molecules in an exhaust flow within an exhaust aftertreatment system of an internal combustion engine includes storing NOx from the exhaust flow on a NOx storage component within an aftertreatment device exposed to the exhaust flow. When the exhaust flow includes molecular hydrogen, he stored NOx is released to create ammonia in the exhaust flow. In a selective catalytic reduction device that is downstream of the aftertreatment device, the created ammonia is utilized to reduce NOx in the exhaust flow. | 10-20-2011 |
20110252767 | APPARATUS AND METHOD TO DIAGNOSE A NOX SENSOR - A method includes raising a temperature of an SCR catalyst for a predetermined time period while dosing urea. The method further includes maintaining the temperature of the SCR catalyst without dosing urea for a second predetermined time period. The method further includes filtering out at least low frequency data from a first NO | 10-20-2011 |
20110252768 | METHOD AND APPARATUS FOR THE SELF-DIAGNOSIS OF AN EXHAUST GAS PROBE - A method for the self-diagnosis of an exhaust gas probe ( | 10-20-2011 |
20110252769 | DIESEL PARTICULATE FILTER OVERSTRESS MITIGATION - Methods and systems for reducing overstress of a DPF are provided herein. One example of such a method is based on a radial temperature gradient near the exit face of the diesel particulate filter. In this way, it becomes possible to more closely correlate radial stresses to actual risk of DPF fracture. | 10-20-2011 |
20110252770 | Regeneration Method For Ceramic Honeycomb Structures - A method for regenerating a diesel particulate filter includes elevating a temperature of a gas stream flowing into an inlet of the diesel particulate filter to greater than or equal to 450° of the inlet of the diesel particulate filter, wherein the gas stream at the inlet of the diesel particulate filter contains an amount of NOx of equal to or greater than 300 ppm, and an amount of O | 10-20-2011 |
20110258982 | METHOD FOR THE ON-BOARD REACTIVATION OF THERMALLY AGED NITROGEN OXIDE STORAGE CATALYSTS IN MOTOR VEHICLES HAVING AN INTERNAL COMBUSTION ENGINE OPERATED PREDOMINANTLY UNDER LEAN CONDITIONS - Nitrogen oxide storage catalysts are used to remove the nitrogen oxides present in the lean exhaust gas of lean-burn engines. Storage catalysts are thermally aged by high temperatures. Ageing is due to sintering of the catalytically active noble metal components of the catalyst and to formation of compounds of the storage components with the support materials. According to the invention, the formation of compounds of the storage materials can be largely reversed by treatment of the storage material with a gas mixture containing carbon dioxide, optionally water vapor and optionally nitrogen oxides at temperatures in the range from 200° C. to 950° C., preferably from 300° C. to 700° C. The reactivation can be carried out under emission-neutral conditions directly in the vehicle during driving operation by setting of suitable exhaust gas conditions and regulating the air/fuel ratio. | 10-27-2011 |
20110258983 | RECONFIGURABLE MIXER FOR AN EXHAUST AFTERTREATMENT SYSTEM AND METHOD OF USING THE SAME - A mixer for an exhaust aftertreatment system, such as a diesel engine exhaust aftertreatment system, is disclosed. The mixer includes a body portion that is configured to be disposed in an exhaust conduit upstream of an exhaust aftertreatment device and an airfoil portion that is disposed on the body portion and reversibly movable between a deployed position and a retracted position, wherein in the deployed position the airfoil portion provides a deployed resistance to an exhaust gas flow and in the retracted position provides a retracted resistance, and the deployed resistance is greater than the retracted resistance. The mixer preferably comprises a two-way shape memory alloy, particularly a high temperature, oxidation resistant shape memory alloy. An exhaust aftertreatment system employing the mixer is also disclosed, as well as a method of using the same. | 10-27-2011 |
20110258984 | START-STOP HYBRID EXOTHERMIC CATALYST HEATING SYSTEM - A catalyst heating system includes a first monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The first monitoring module monitors at least one of (i) a first temperature of a first catalyst of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly. The mode selection module is configured to select an EHC heating mode and at least one of a fuel enrichment mode and a secondary air injection mode based on the at least one of the first temperature and the active catalyst volume. The EHC control module controls current to one of the first catalyst and a second catalyst of the catalyst assembly based on the mode signal. | 10-27-2011 |
20110258985 | Electrically Heated Filter Regeneration Methods and Systems - A method of regenerating a particulate filter is provided. The method includes estimating a stress level of the particulate filter; and selectively controlling current to a heater of the particulate filter based on the stress level. | 10-27-2011 |
20110258986 | METHOD FOR REGENERATING A DIESEL PARTICLE FILTER - A method for regenerating a diesel particle filter ( | 10-27-2011 |
20110258987 | VAPORIZER - A vaporizer device which works together with an exhaust pipe carrying process exhaust gas. An exhaust duct of the vaporizer device opens into the exhaust pipe. The vaporizer device has a burner comprising an injection device for fuel and air, a combustion chamber, and the exhaust duct. An exhaust gas aftertreatment device is inserted into the exhaust pipe downstream of the junction with the exhaust duct. A method for the operation of such a vaporizer device. According to the invention, a vaporizer device and a method for the operation of such a vaporizer device are provided, and are expanded or improved with respect to the functionality thereof. This is achieved in that an introduction device for the vaporizable liquid is inserted into the exhaust duct. The corresponding method is characterized in that the burner provides sufficient thermal energy, wherein the lower limit thereof is prespecified by the provision of an amount of energy which is sufficient for the vaporization of an amount of vaporizable liquid which is larger than the amount of vaporizable liquid introduced into the exhaust duct. | 10-27-2011 |
20110265450 | POST-COMBUSTION FUEL INJECTION CONTROL SYSTEMS AND METHODS - An exhaust control system comprises a total loss determination module and a fuel control module. The total loss determination module determines a total energy loss rate of exhaust upstream of a location in an exhaust system based on a convective energy loss rate upstream of the location, a conductive energy loss rate upstream of the location, and an oxidation energy gain rate upstream of the location. The fuel control module receives a target temperature for the exhaust at the location and determines a target input energy rate based on the target temperature, a temperature of exhaust input to the exhaust system, and the total energy loss rate. The fuel control module controls a rate of fuel injection into the exhaust system upstream of an oxidation catalyst based on the target input energy rate. | 11-03-2011 |
20110265451 | ASSEMBLY AND METHOD FOR REDUCING NITROGEN OXIDES, CARBON MONOXIDE AND HYDROCARBONS IN EXHAUSTS OF INTERNAL COMBUSTION ENGINES - An assembly and method for reducing nitrogen oxides, carbon monoxide and hydrocarbons in exhausts of internal combustion engines, wherein the exhaust is acted upon in a first stage catalytic converter. A first portion of the first stage catalytic converter output is cooled and a second portion of the catalytic converter output is not cooled. The cooled and not cooled exhausts are united and directed to a second stage catalytic converter. Air is injected into a selected one of (1) the not cooled exhaust prior to the juncture thereof with the cooled exhaust, and (2) the combined cooled and not cooled exhausts after the juncture thereof. | 11-03-2011 |
20110265452 | AMMONIA SENSOR CONTROL OF AN SCR AFTERTREATMENT SYSTEM - A system includes an engine, an exhaust conduit for the engine, a first SCR catalyst fluidly coupled to the exhaust conduit, and a second SCR catalyst fluidly coupled to the exhaust conduit at a position downstream of the first SCR catalyst. The system further includes an ammonia sensor positioned between the first and second SCR catalysts. A reductant doser is positioned upstream of the first SCR catalyst. The system includes a controller that determines an amount of NH | 11-03-2011 |
20110265453 | Methods and Systems for Variable Displacement Engine Control - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection. | 11-03-2011 |
20110265454 | Methods and Systems for Variable Displacement Engine Control - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection. | 11-03-2011 |
20110271656 | CONTROL SYSTEM AND METHOD FOR PREVENTING HYDROCARBON SLIP DURING PARTICULATE MATTER FILTER REGENERATION - An engine control system includes an injection determination module and an injection regulation module. The injection determination module determines a desired rate of hydrocarbon (HC) injection into exhaust gas produced by an engine for regeneration of a particulate matter (PM) filter. The injection regulation module increases a rate of HC injection from a first rate to the desired rate during a predetermined period before regeneration of the PM filter, wherein the predetermined period is based on a difference between a predetermined temperature and a temperature at an outlet of an oxidation catalyst (OC). | 11-10-2011 |
20110271657 | CONTROL SYSTEM AND METHOD FOR IMPROVED EFFICIENCY OF PARTICULATE MATTER FILTER REGENERATION - An engine control system includes an injection determination module and an injection distribution module. The injection determination module determines a desired amount of hydrocarbons (HC) to inject into exhaust gas produced by an engine for regeneration of a particulate matter (PM) filter. The injection distribution module controls a ratio of auxiliary injection to post-combustion injection based on engine load, engine speed, and the desired amount of HC injection, wherein auxiliary injection includes injecting HC into the exhaust gas, and wherein post-combustion injection includes injecting HC into cylinders of the engine during a period after combustion. | 11-10-2011 |
20110271658 | NITROGEN OXIDE STORAGE CATALYTIC CONVERTER FOR USE IN A MOTOR VEHICLE IN A CLOSE-COUPLED POSITION - The use of nitrogen oxide storage catalysts in a close-coupled position for the cleaning of the exhaust gases from gasoline engines with direct gasoline injection which are operated with a predominantly lean air/fuel mixture places particular demands on the thermal stability and aging stability of the catalysts to be used. | 11-10-2011 |
20110277449 | HYBRID CATALYST RADIANT PREHEATING SYSTEM - A catalyst heating system includes a monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The monitoring module monitors at least one of (i) a first active volume of a catalyst assembly in an exhaust system of an engine and (ii) a first temperature of a non-EHC of the catalyst assembly. The mode selection module is configured to select a non-EHC radiant heating mode and generate a mode signal based on the at least one of the first active catalyst volume and the first temperature. An EHC control module increases temperature of the EHC to an elevated temperature that is greater than a stabilization temperature based on the mode signal. The stabilization temperature is greater than a catalyst light off temperature. | 11-17-2011 |
20110277450 | REGULATING STRATEGY FOR A CATALYTIC CONVERTER CONCEPT FOR EXHAUST-GAS AFTERTREATMENT HAVING A PLURALITY OF NITROGEN OXIDE STORAGE CATALYTIC CONVERTERS - The present invention relates to a regulating strategy for a special catalytic converter for exhaust-gas aftertreatment. The catalytic converter concept is distinguished in that at least two nitrogen oxide storage catalytic converters are used in the exhaust section of a vehicle. The first, possibly close-coupled unit is followed by one or more nitrogen oxide storage catalytic converters, which are possibly situated in the underbody of the vehicle. The nitrogen oxide storage catalytic converters are then regenerated as a function of the exceedance of nitrogen oxide threshold vales downstream thereof. | 11-17-2011 |
20110283675 | HYBRID CATALYST CONVECTIVE PREHEATING SYSTEM - A catalyst heating system includes a monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The monitoring module monitors at least one of (i) a first temperature of a non-EHC of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly. The mode selection module is configured to select an EHC heating mode and generate a mode signal based on the at least one of the first temperature and the active catalyst volume. The EHC control module controls current to an EHC of the catalyst assembly based on the mode signal. | 11-24-2011 |
20110283676 | SYSTEMS AND METHODS FOR ABATING CARBON MONOXIDE IN AN EXHAUST STREAM - A method for abating carbon monoxide in an exhaust stream may include injecting an amount of air into the exhaust stream to produce an air/exhaust mixture; measuring an air/fuel ratio of the air/exhaust mixture; reacting carbon monoxide in the air/exhaust mixture with oxygen in the presence of a catalyst to produce carbon dioxide to abate carbon monoxide in the air/exhaust mixture; measuring a temperature of the catalyst; and adjusting the amount of air injected into the exhaust stream based on the air/fuel ratio or the temperature of the catalyst. | 11-24-2011 |
20110283677 | EXHAUST GAS POSTTREATMENT DEVICE FOR AN INTERNAL COMBUSTION ENGINE - The invention relates to an exhaust gas after-treatment device and a method, having a storage container and a buffer reservoir, both of which can be heated. In this manner it is possible to significantly reduce the energy requirement for providing gaseous ammonia for an exhaust gas after-treatment device of an internal combustion engine. | 11-24-2011 |
20110283678 | METHOD FOR CONTROLLING INJECTION OF DIESEL EXHAUST FLUID INTO AN EXHAUST PIPE OF AN INTERNAL COMBUSTION ENGINE - A method is provided for controlling injection of Diesel Exhaust Fluid into an exhaust pipe of an internal combustion engine equipped with a Selective Reduction Catalyst. The method includes, but is not limited to monitoring a value of a control parameter influencing an operation of the Selective Reduction Catalyst, injecting a quantity of Diesel Exhaust Fluid, controlling the quantity of Diesel Exhaust Fluid to be injected employing a closed loop procedure or an open loop procedure, switching between the closed loop procedure and the open loop procedure, when value of the control parameter crosses a first threshold value of the control parameter. | 11-24-2011 |
20110283679 | PARTICULATE FILTER SYSTEM HAVING A VARIABLE DEGREE OF SEPARATION - A method for the operation of a particulate filter system for an internal combustion engine wherein an. An exhaust gas stream enters a housing via a gas inlet opening. The housing receives a particulate filter, the stream flows into crude gas ducts connected to the gas inlet opening, and the stream can flow out of the particulate filter via clean gas ducts that are in fluid connection with a gas outlet opening, and are separated from the crude gas ducts. The crude gas ducts are connected to a connecting space in the direction of flow, and the connecting space has an exhaust port controlled by a closing mechanism. According to the invention, a method for operating an open particulate filter system is provided, by which the degree of separation of the soot particles from the exhaust gas can be increased. This is achieved in that a partial exhaust gas stream of the exhaust gas stream can be discharged via the exhaust port into the environment, just as the primary exhaust gas flow can be discharged into the environment via the gas outlet opening, according at least to a particulate load thereof. | 11-24-2011 |
20110283680 | METHOD FOR PURIFICATION OF EXHAUST GAS FROM A DIESEL ENGINE - The invention provides a method for purification of exhaust gas from a diesel engine in a system, which comprises a device for selective catalytic reduction and a diesel particulate filter preferably at least partially covered by a catalytic layer installed downstream of the device for selective catalytic reduction. A device for catalytic oxidation is installed upstream of the device for selective catalytic reduction and/or between the device for selective catalytic reduction and the diesel particulate filter. A device for injection of a controlled amount of reductant is installed inlet of the device for selective catalytic reduction, and a device for injection of a controlled amount of hydrocarbon is installed inlet of the catalytic oxidation. | 11-24-2011 |
20110283681 | METHOD FOR OPERATING COMPONENTS FOR EXHAUST GAS AFTER-TREATMENT AND EXHAUST GAS AFTER-TREATMENT APPARATUS - A method of operating components for exhaust gas after-treatment disposed in the exhaust gas tract of a turbocharged internal combustion engine. A partial exhaust gas stream is removed from the main exhaust gas stream upstream of at least one exhaust gas turbine. The partial exhaust gas stream is fed back into the main exhaust gas stream downstream of the at least one exhaust gas turbine. The feed is located, in terms of exhaust flow, between an NO oxidation catalytic converter and a particle filter (i.e., the exhaust gas after-treatment component). That is, the at least one exhaust gas after-treatment component is arranged downstream of the feed. The quantity of exhaust gas branched off as a partial exhaust gas stream is controlled or closed-loop controlled as a function of at least one target temperature in at least one defined point in the exhaust gas tract, in particular in the partial exhaust gas stream and/or of the at least one exhaust gas after-treatment component. | 11-24-2011 |
20110283682 | SYSTEM AND METHOD FOR REGENERATING A PARTICULATE FILTER - Various methods and systems are provided for a vehicle with an engine. In one example, a method includes identifying an approaching tunnel. The method further includes, responsive to a particulate load of a particulate filter, the particulate filter disposed in an exhaust treatment system of an engine of the vehicle, initiating regeneration of the particulate filter at a selected distance before the tunnel such that regeneration is performed before the vehicle enters the tunnel. | 11-24-2011 |
20110283683 | Composition and Method for Controlling Excessive Exhaust Gas Temperatures - A method of operating an internal combustion engine having a reductant delivery and storage system in an emission control system is disclosed. The method includes an approach for reducing thermal damage to aftertreatment devices in an exhaust system by reducing excessive exhaust gas temperatures created during particulate filter regeneration. | 11-24-2011 |
20110289901 | Carbon dioxide sequestration in freshly mixed concrete using the exhaust from the concrete truck - A process for sequestering carbon dioxide in fresh concrete from the exhaust emitted from the combustion of carbonaceous fuel in a concrete mixing truck is disclosed. In the process, exhaust from the engine containing carbon dioxide is redirected after passing through the required environmental controls to the concrete mixing chamber on the concrete truck. This carbon dioxide is allowed to physically mix with the ingredients producing fresh concrete. When the concrete is made from cementitious material which include calcium oxide, then the carbon dioxide may chemically bind with the calcium to form calcium carbonate and be permanently sequestered in the concrete product. | 12-01-2011 |
20110289902 | METHOD FOR OPERATING AN EXHAUST VALVE FOR DIESEL PARTICULATE FILTER REGENERATION - A method of operating an exhaust valve ( | 12-01-2011 |
20110289903 | DEVICE AND METHOD FOR REGENERATING A PARTICULATE FILTER ARRANGED IN THE EXHAUST SECTION OF AN INTERNAL COMBUSTION ENGINE - A device and a method for regenerating a particulate filter that is arranged in the exhaust tract of an internal combustion engine. There is disposed at least one NO oxidation catalytic converter upstream of the particulate filter for the oxidation of NO, and in particular to form NO | 12-01-2011 |
20110296816 | ON-BOARD VEHICLE DIAGNOSTIC OF AN OXIDATION CATALYST - There is presented a method for monitoring an oxidation catalyst in an exhaust line of an internal combustion engine, wherein a catalyst diagnostic event comprises a test cycle during which a conversion capability of the oxidation catalyst is determined based on the exotherm generated by post-injection of fuel. The diagnostic event may only be initiated when the temperature of the oxidation catalyst lies within a predetermined temperature range. | 12-08-2011 |
20110296817 | ADAPTIVE OXYGEN SENSOR METHODS, SYSTEMS, AND SOFTWARE - One embodiment is a system operable to control entry of an oxygen sensor into a learning mode. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings. | 12-08-2011 |
20110302909 | Selective Catalytic Reduction Via Electrolysis of Urea - A method for producing ammonia suitable for use as a reductant in a combustion exhaust gas treatment system is provided that includes the electrolytic hydrolysis of urea under mild conditions. The ammonia generator, which includes an electrolysis apparatus including an electrolytic flow cell, an alkaline electrolyte composition, and a recirculation system, may be operatively coupled to an exhaust gas treatment system to provide an apparatus for reducing nitrogen oxides (NO | 12-15-2011 |
20110314793 | SYSTEM AND METHOD FOR DETERMINING AN AGE OF AND CONTROLLING A SELECTIVE CATALYTIC REDUCTION CATALYST - An exhaust treatment system for exhaust gas produced by an engine includes a condition control module, a load determination module, and an age determination module. The condition control module decreases a load on a selective catalytic reduction (SCR) catalyst below a predetermined load threshold and increases exhaust gas temperature (EGT) to a predetermined temperature. The load determination module increases injection of a dosing agent into the exhaust gas and determines a load on the SCR catalyst when dosing agent is detected downstream from the SCR catalyst. The age determination module determines an age of the SCR catalyst based the determined load and predetermined loads for first and second SCR catalysts, respectively. | 12-29-2011 |
20110314794 | DIESEL ENGINE SYSTEM AND METHOD AND APPARATUS FOR HANDLING DIESEL ENGINE EXHAUST - A diesel engine system includes a diesel engine, a NOx control device downstream of the engine, an exhaust line between the engine and the NOx control device, a bypass line connected to the exhaust line at a first end upstream of the NOx control device, and a bypass valve connecting the exhaust line and the bypass line, the bypass valve permitting flow through the exhaust line to the NOx control device when in an open position and preventing flow through the exhaust line to the NOx control device and permitting flow through the exhaust line to the bypass line when in a closed position. A controller can arranged to control opening and dosing of the bypass valve, such as when an operating condition of the engine reaches a predetermined operating condition. | 12-29-2011 |
20120000180 | SYSTEM AND METHOD FOR PARTICULATE MATTER FILTER REGENERATION USING A CATALYTIC CONVERTER AS A COMBUSTOR - A control system for an engine includes an exhaust module and a combustion module. The exhaust module supplies a first MAF to exhaust produced by the engine upstream of a catalytic converter during regeneration of a PM filter located downstream of the catalytic converter. The combustion module, during the regeneration, supplies a first amount of fuel to a cylinder during an intake stroke based on the first MAF and a second MAF to the cylinder during the intake stroke. The combustion module, during the regeneration, further supplies a second amount of fuel to the cylinder during a subsequent intake stroke based on a first A/F ratio of the cylinder and an oxygen content of the exhaust downstream of the catalytic converter. A method for controlling an engine during regeneration of the PM filter is also provided. | 01-05-2012 |
20120000181 | EXHAUST SYSTEM HAVING AN AFTERTREATMENT MODULE - An aftertreatment module for use with an engine is disclosed. The aftertreatment module may have a first chamber with an inlet, and at least one catalyst substrate disposed in the first chamber in a flow path through the inlet and having a flow direction from an inlet face to an outlet face in general alignment with the flow path. The aftertreatment module may also have a second chamber with at least one outlet in general alignment with the flow direction through the inlet. The aftertreatment module may further have at least one noise attenuation passage fluidly connecting the first chamber with the second chamber. The at least one noise attenuation passage may be oriented generally orthogonal to the inlet and the at least one outlet and be located between the inlet and the outlet face of the at least one catalyst substrate. | 01-05-2012 |
20120000182 | HYDROCARBON ADSORBER REGENERATION SYSTEM - A regeneration system includes a first module, a mode selection module and an adsorber regeneration control (ARC) module. The first module monitors at least one of (i) a temperature of a first catalyst of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the first catalyst. The mode selection module is configured to select an adsorber regeneration mode and generates a mode signal based on the at least one of the temperature and the active catalyst volume. The ARC module at least one of activates an air pump and cranks the engine to regenerate an adsorber of the catalyst assembly while the engine is deactivated based on the mode signal. | 01-05-2012 |
20120000183 | METHOD FOR INJECTING AMMONIA INTO AN EXHAUST GAS STREAM | 01-05-2012 |
20120000184 | METHOD OF MONITORING SOOT MASS IN A PARTICULATE FILTER AND MONITORING SYSTEM FOR SAME - A method of monitoring soot mass in a particulate filter of an exhaust system includes predicting soot mass in the particulate filter based at least partially on a pressure differential between exhaust flowing into the filter and exhaust flowing out of the filter. The predicted soot mass is then revised based at least partially on measured operating parameters indicative of mass flow rate of nitrogen oxides in exhaust flow of the exhaust system and temperature of the particulate filter. | 01-05-2012 |
20120000185 | METHOD FOR DETECTING ABNORMALITY IN REDUCING AGENT - Disclosed is a method for detecting abnormality in a reducing agent | 01-05-2012 |
20120006002 | DEVICE FOR DETERMINING DETERIORATION OF CATALYST AND METHOD FOR DETERMINING DETERIORATION OF CATALYST - The degree of deterioration of a catalyst is obtained accurately in cases where a plurality of catalysts is disposed at an exhaust passage of an internal combustion engine. Under the assumption that the degree of deterioration of a catalyst which is disposed at a location upstream of an NO | 01-12-2012 |
20120006003 | METHOD OF OPERATING A VEHICLE UNDER FROZEN DIESEL EMISSION FLUID CONDITIONS - A method of controlling a vehicle includes determining if a diesel emission fluid is at least partially frozen, and determining if the vehicle is currently operating in a low diesel emission fluid inducement protocol. If the vehicle is not currently operating in the low diesel emission fluid inducement protocol, and the diesel emission fluid is at least partially frozen, then a temporary minimum diesel emission fluid mass may be defined to prevent entry of the vehicle into the low diesel emission fluid inducement protocol. | 01-12-2012 |
20120006004 | METHODS AND SYSTEMS FOR CONTROLLING REDUCTANT LEVELS IN AN SCR CATALYST - Methods and systems for controlling reductant levels in an SCR catalyst are provided. In one aspect, reductant levels are adjusted in response to a ratio of change of NOx conversion efficiency to a change of reductant level. In another aspect, reductant injection levels are periodically adjusted to see if NOx conversion efficiency is better or worse at the adjusted levels. | 01-12-2012 |
20120006005 | Exhaust Gas Post Processing System and Control Method Thereof - An exhaust gas processing method may include desulfurizing a catalyst by raising temperature of the catalyst to a predetermined value, if the front/end temperature difference ΔT is less than a predetermined temperature difference X, while reducing agent is being injected, determining whether travel distance, fuel consumption amount, or travel time exceeds a first reference value, after the desulfurization, determining whether fuel is replenished by detecting the fuel amount, and determining whether a high sulfur fuel is refueled or not, if the first reference value does not exceed a predetermined value, the fuel is replenished, and the temperature difference (ΔT) is less than the predetermined temperature difference (X) during injection of the reducing agent. Accordingly, while the nitrogen oxide purification mode is being performed so as to eliminate the nitrogen oxide, the desulfurization control is performed according to a temperature difference between the front and the rear of the catalyst, and if the abnormal desulfurization control is repeatedly performed, it is determined that the high sulfur fuel is replenished. Further, this method has the vehicle driver effectively determine whether the high sulfur fuel is replenished or not and guide the vehicle driver not to replenish the high sulfur fuel some other time. | 01-12-2012 |
20120006006 | Exhaust Gas Treatment Device and Method for Operating an Exhaust Gas Treatment Device - An exhaust gas treatment device for an internal combustion engine, with a first particle filter and a second particle filter arranged downstream of the first particle filter in the flow direction of the exhaust gas through the exhaust gas treatment device. The second particle filter includes a support device that can be flown through by the exhaust gas, on which a filter unit is disposed. A pore size of the filter unit is less than a pore size of the support device. A method for operating an exhaust gas treatment device for an internal combustion engine is also provided. | 01-12-2012 |
20120006007 | METHOD FOR OPERATING AN EXHAUST SYSTEM, EXHAUST SYSTEM AND VEHICLE HAVING AN EXHAUST SYSTEM - A method for operating an exhaust system including at least one oxidation catalytic converter, at least one configuration for selective catalytic reduction and at least one measuring probe for determining the effectiveness of the configuration, includes at least determining a conversion effectiveness of the configuration using the at least one measuring probe and calculating an effectiveness of nitrogen monoxide conversion in the oxidation catalytic converter from the determined conversion effectiveness. In this way, an estimate of the effectiveness of the nitrogen monoxide conversion to nitrogen dioxide of an oxidation catalytic converter in the exhaust system can be obtained without additional measuring probes in or on the oxidation catalytic converter. This reduces the maintenance frequency of the exhaust gas system and at the same time enables precise regulation of the exhaust gas conversion as a whole. An exhaust system and a vehicle having an exhaust system are also provided. | 01-12-2012 |
20120011829 | METHOD TO OPERATE A DIESEL PARTICULATE FILTER - A method is provided to operate a diesel particulate filter of a Diesel engine equipped with a soot-sensor located in an outlet of the diesel particulate filter, the soot-sensor operating according to a succession of soot loading phases mutually separated by a regeneration phase. The method includes, but is not limited to setting a borderline value of the efficiency of the diesel particulate filter, resetting a value of a counter, during a regeneration phase of the soot-sensor, this value representing a soot loading level of the soot-sensor, iteratively increasing the value of this counter, during a next soot loading phase of the soot-sensor, at least until the value reaches a predetermined threshold value of the counter, and detecting an unsuited efficiency of the diesel particulate filter, if a next regeneration phase of the soot-sensor begins when the value of the counter is below the predetermined threshold value of the counter. | 01-19-2012 |
20120017567 | TRANSIENT COMPENSATION CONTROL OF AN SCR AFTERTREATMENT SYSTEM - A system includes an internal combustion engine, an exhaust conduit fluidly coupled to the internal combustion engine and an SCR catalyst, and a reductant doser operationally coupled to the exhaust conduit at a position upstream of the SCR catalyst. The reductant doser is responsive to a reductant doser command. The system includes a controller having a number of modules functionally structured to execute operations to compensate for transient operation of the system. An NH | 01-26-2012 |
20120017568 | AMMONIA SENSOR CONTROL, WITH NOX FEEDBACK, OF AN SCR AFTERTREATMENT SYSTEM - An exemplary method includes determining an NH | 01-26-2012 |
20120017569 | Exhaust System with Reactive Heating System - The invention relates to a system component of an exhaust system for a combustion engine, more preferably of a motor vehicle, with at least one component portion having a closed hollow space structure ( | 01-26-2012 |
20120023903 | APPARATUS AND METHOD FOR MONITORING REGENERATION FREQUENCY OF A VEHICLE PARTICULATE FILTER - A vehicle includes an engine, a regenerable exhaust stream particulate filter, and a host machine. The host machine has a pair of soot models providing respective actual and modeled soot mass values for the soot contained in the particulate filter, calculates a ratio of a change in the actual and modeled soot masses, and executes a control action when the ratio exceeds a calibrated threshold. A diagnostic code and/or activation of an indicator device may be part of the control action. A system includes the particulate filter and host machine noted above. A method for use aboard the vehicle includes determining the actual and modeled soot mass values using first and second soot models, respectively, calculating a ratio of a change in the actual and modeled soot mass, comparing the ratio to a calibrated threshold, and executing a control action when the ratio exceeds the threshold. | 02-02-2012 |
20120023904 | EXHAUST GAS POST PROCESSING SYSTEM AND CONTROL METHOD THEREOF - An exhaust gas post processing method, may include detecting driving conditions of an engine, determining a ratio of soluble organic matter and carbon particles trapped in a diesel particulate filter according to the detected driving conditions, selecting a first predetermined temperature and a first maintain time for eliminating the soluble organic matter according to the ratio of the soluble organic matter and the carbon particles, and controlling a temperature of the diesel particulate filter according thereto, and eliminating the soluble organic matter by sustaining the first predetermined temperature for the first maintain time, selecting a second predetermined temperature for eliminating the carbon particles, and controlling a temperature of the diesel particulate filter according thereto. | 02-02-2012 |
20120023905 | SYSTEM, METHOD, AND APPARATUS TO ENGAGE ALTERNATE REDUCTANT IN A NOX REDUCTION SYSTEM - An exhaust aftertreatment process including providing a selective catalytic reduction (SCR) catalyst disposed in an exhaust stream of an internal combustion engine; determining that a temperature of the exhaust stream is not within an NH | 02-02-2012 |
20120023906 | SYSTEM AND APPARATUS FOR ENHANCING EXHAUST AFTERTREATMENT STARTUP EMISSIONS CONTROL - An aftertreatment system including a method which provides a selective catalytic reduction (SCR) catalyst disposed in an exhaust stream of an engine; determines that an ammonia pre-load condition for the SCR catalyst is present; determines a first amount of ammonia pre-load in response to the ammonia pre-load condition; injects an amount of ammonia or urea into the exhaust stream in response to the first amount of ammonia; and adsorbs a second amount of ammonia onto the SCR catalyst in response to injecting an amount of ammonia or urea, where the second amount of ammonia is either the injected amount of ammonia or an amount of ammonia resulting from hydrolysis from the injected amount of urea. | 02-02-2012 |
20120023907 | SYSTEM AND METHOD FOR PROCESSING NH3 SLIPPAGE OF A SELECTIVE CATALYST REDUCTION SYSTEM - Systems and methods for storing NH | 02-02-2012 |
20120023908 | Method for diagnosing an exhaust gas sensor and device for carrying out the method - A method is described for diagnosing an exhaust gas sensor which is situated in the exhaust gas area of an internal combustion engine for the purpose of detecting at least one exhaust gas component, which is heated with the aid of a sensor heater and whose temperature is detected. A device for carrying out the method is also described. The exhaust gas sensor is heated to a diagnosis starting temperature which is higher than the exhaust gas temperature; the heat output of the sensor heater is reduced or the sensor heater is completely turned off at least to the extent that the sensor temperature is able to decrease; the decreasing sensor temperature is detected; a measure for the temperature drop in relation to time is ascertained; this measure is compared with a first temperature gradient threshold value; and an error signal is provided if the temperature drop is too slow and therefore the ascertained measure for the temperature drop in relation to time does not exceed the first temperature gradient threshold value. | 02-02-2012 |
20120023909 | METHODS AND SYSTEMS FOR AN ENGINE EMISSION CONTROL SYSTEM - Systems and methods are provided for a layered emission control device coupled to an exhaust manifold. Various formulations may be incorporated in a plurality of layers of the device to enable various emission control functions to be grouped within spatial constraints. The layers may be organized to reduce functional interference and improve functional synergy between the various emission control functions. | 02-02-2012 |
20120023910 | Particulate Filter Regeneration Control System and Method - Systems and methods for controlling regeneration of a diesel particulate filter in a vehicle engine exhaust include detecting a distance of an object from the exhaust and controlling a regeneration event if the distance is less than a threshold value. The system and method may include a particulate filter disposed in the exhaust of the vehicle and a proximity sensor disposed adjacent an exhaust opening and positioned to detect presence of an object near the opening. A controller in communication with the proximity sensor is adapted for controlling regeneration of the particulate filter in response to the proximity sensor detecting the object near the opening. | 02-02-2012 |
20120031073 | Supply arrangement for supplying an exhaust gas system with a solution including a reduction agent, an internal combustion engine, a generator uint and a method as well as a control arrangement therefor - In a supply arrangement for supplying a solution containing a reducing agent, in particular urea, to an exhaust gas system of an internal combustion engine wherein a supply line extending from a storage tank to an injector which is connected to the exhaust gas system includes an operating tank and a dosing arrangement, a return line extends between the dosing arrangement and the storage tank and the dosing arrangement includes a directional valve for directing solution to the injector during a first operating mode in which the engine is operating and, in a second operating mode in which the engine is shut down, directing the solution back to the storage tank for emptying the operating tank. | 02-09-2012 |
20120031074 | METHOD AND DEVICE FOR REGENERATING A PARTICLE FILTER - A method and device for monitoring and controlling the regeneration of a particle filter in an exhaust gas duct of an internal combustion engine which has a three-way catalytic converter downstream of the particle filter, wherein the particle filter is regenerated by oxidative burning of the particles during a regeneration phase, wherein oxygen consumption is balanced, directly or indirectly, during the regeneration phase via the temporal variation of a first signal of a first lambda probe, which is arranged upstream of the particle filter, in comparison to the temporal variation of a second signal of a second lambda probe, which is arranged downstream of the particle filter. A lambda value of λ=1 is set downstream of the three-way catalytic converter during the regeneration of the particle filter by means of lambda control and the second lambda probe which is arranged downstream of the three-way catalytic converter. | 02-09-2012 |
20120031075 | METHOD FOR DETERMINING OXYGEN STORAGE CAPACITY - The oxygen storage capacity of an oxygen store associated with a catalytic converter of a combustion engine is computed by forming an integral which begins at the time of a changeover in the exposure, e.g., from rich to lean, and ends when the output signal of a post-catalytic converter lambda probe is less than a threshold value. A correction is performed to take into a consideration a time offset in the signals of the post-catalytic converter lambda probe. In particular, the time offset is measured to determine a time at which the integration should have been terminated, wherein this time is inferred retroactively. | 02-09-2012 |
20120031076 | METHOD AND DEVICE FOR REGENERATING A PARTICLE FILTER - A method for the targeted initiation of a regeneration of a particle filter in an exhaust-gas duct of an internal combustion engine which has a catalytic converter downstream of the particle filter in the flow direction of the exhaust gas, the regeneration of the particle filter taking place by means of an oxidative burn-off of the particles during the regeneration phase. | 02-09-2012 |
20120036832 | Methods and Device for Low Contamination Energy Generation - A method for low-contamination generation of energy comprising: (a) forming a gas mixture by mixing a treated gaseous effluent stream and air; (b) introducing the gas mixture and fuel at a given gas to fuel ratio into at least one diesel engine ( | 02-16-2012 |
20120036833 | Scavenging Vacuum Pressure Provisioning with Exhaust Treatment - In one embodiment, a method that includes collecting particles from an intake flow of air for a diesel engine; removing the particles collected using scavenging vacuum pressure and without adding exhaust restriction; and treating combustion products of the diesel engine. | 02-16-2012 |
20120036834 | Mn, Ce and Zr MIXED OXIDES OXIDATION CATALYST - The oxidation of nitrogen oxide (NO) in an oxygen-containing exhaust gas flow from a diesel or other lean-burn engine may be catalyzed using particles of co-precipitated and calcined manganese (Mn), cerium (Ce) and zirconium (Zr) mixed oxides. In preferred embodiments, the molar ratios of Mn, Ce and Zr to the total amount of base metals in the ternary mixed oxide catalyst are in the range of 0.25-0.35, 0.40-0.50 and 0.20-0.25, respectively. Further, this ternary mixed oxide catalyst is less susceptible to sulfur poisoning than previously-disclosed binary mixed oxide catalysts. The ternary mixed oxide catalyst may also be regenerated—and the inhibiting effect of SO | 02-16-2012 |
20120036835 | METERING SYSTEM FOR INJECTING A REDUCING AGENT INTO THE EXHAUST GAS FLOW OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a reducing agent metering system, and to a method for controlling the injection of a reducing agent into the exhaust gas flow ( | 02-16-2012 |
20120042631 | CATALYST MATERIALS FOR AMMONIA OXIDATION IN LEAN-BURN ENGINE EXHAUST - An exhaust aftertreatment system and a method for treating exhaust produced by a lean-burn engine are provided. The exhaust aftertreatment system may include an exhaust gas treatment subsystem and a clean-up oxidation catalyst located downstream of the exhaust gas treatment subsystem. The clean-up oxidation catalyst can selectively oxidize NH | 02-23-2012 |
20120042632 | METHOD AND APPARATUS FOR PROCESSING EXHAUST GAS IN INTERNAL COMBUSTION ENGINE - An exhaust gas processing apparatus ( | 02-23-2012 |
20120042633 | System and Methods for Skip Fire Engine with a Lean NOx Trap - Systems and methods for skip fire spark ignition engine operation with a lean NOx trap after-treatment are provided. This system includes engine control circuitry capable of fueling and firing subsets of the engine's cylinders. Other cylinders are not provided fuel and are not fired (i.e. “skip fired”). The system includes an exhaust manifold for channeling the exhaust from at least some cylinders through a multistage catalytic converter. This may include a standard two-way or three-way catalytic converter. From the catalytic converter the exhaust may be channeled through a lean NOx trap. The lean NOx trap is able to chemically absorb the NOx emissions for regeneration according to a regeneration protocol. Lean NOx traps may include a substrate, an absorption material (also referred to as a ‘sorbent’) and a catalyst. The regeneration protocol may include monitoring NOx emissions downstream from the lean NOx trap, and comparing them against either a threshold or a lean NOx trap saturation model. Once the NOx emissions reach the threshold, or deviate from the model, a regeneration cycle may be performed. | 02-23-2012 |
20120042634 | METHOD FOR OPERATING AN EXHAUST GAS PURIFICATION DEVICE HAVING A HEATING APPARATUS AND MOTOR VEHICLE HAVING THE DEVICE - A method for operating a device for the purification of exhaust gas of an internal combustion engine which is operated with an excess of air includes heating at least one heating apparatus of the device above a predetermined first setpoint temperature. The at least one heating apparatus is at least partially in contact with the exhaust gas, can be activated by electrical energy and is formed at least partially with an oxidation coating. At least the temperature of the at least one heating apparatus or of the exhaust gas is subsequently monitored. An increase in the hydrocarbon fraction of the exhaust gas is initiated if at least the temperature of the heating apparatus or of the exhaust gas has reached a threshold temperature or a low-load phase of the internal combustion engine is present. A motor vehicle having the device is also provided. | 02-23-2012 |
20120042635 | Method for Operating a Reducing Agent Supply System - A method for operating a reducing agent supply system for supplying an exhaust aftertreatment system of a motor vehicle is provided. In normal metering operation of the reducing agent supply system an at least approximately continuous air stream and a pulsed reducing agent stream are produced and are released at least partially via the nozzle into the exhaust line. In a cleaning operation for cleaning the reducing agent supply system an air stream formed from a number of air stream pulses and a reducing agent stream formed from a number of reducing agent stream pulses are produced and supplied to the nozzle means. The method can be used in particular in supply systems in which aqueous urea solution is used as reducing agent. | 02-23-2012 |
20120055138 | METHODS FOR ENGINE EXHAUST NOX CONTROL USING NO OXIDATION IN THE ENGINE - A powertrain includes an internal combustion engine having a combustion chamber and an aftertreatment system. A method for reducing NOx emissions in the powertrain includes monitoring an actual exhaust gas feedstream ratio of NO | 03-08-2012 |
20120060470 | ECONOMIC MEANS OF ASPIRATING A FUEL COMBUSTION ENGINE WITH NON-ATMOSPHERIC GASES TO PRODUCE A SUBSEQUENTLY USEFUL BYPRODUCT - Aspirating a fuel combustion engine with non-atmospheric gases to produce exhaust that can be efficiently used as EOR working fluid and/or recirculated in subsequent fuel combustion processes. The EOR working fluid is made up of a combination of gases created in a combustion process in a power-producing fuel combustion engine. This combustion process occurs using a mix of initial combustion ingredients that includes CO | 03-15-2012 |
20120060471 | EXHAUST GAS AFTERTREATEMENT SYSTEM AND METHOD OF OPERATION - An exhaust gas after treatment system for an internal combustion engine comprises an oxidation catalyst device having a first substrate, a heater, and a second substrate disposed serially between the inlet and the outlet. A hydrocarbon supply is connected to and is in fluid communication with the exhaust system upstream of the oxidation catalyst device for delivery of a hydrocarbon thereto. The heater is configured to oxidize the hydrocarbon therein and to raise the temperature of the second substrate and exhaust gas passing therethrough. | 03-15-2012 |
20120060472 | CATALYST MATERIALS FOR NOx OXIDATION IN AN EXHAUST AFTERTREATMENT SYSTEM THAT USES PASSIVE AMMONIA SCR - An exhaust aftertreatment system that receives an exhaust flow from a lean-burn engine and a method for treating the exhaust flow are described. The exhaust aftertreatment system may include a three-way-catalyst, an oxidation catalyst, and a NH | 03-15-2012 |
20120060473 | MARINE EXHAUST CATALYST - An internal combustion engine is coupled to an electric power generator. An exhaust manifold for the engine includes an exhaust gas conduit. A housing includes a catalyst in fluid communication with the conduit to receive exhaust produced by the engine. The catalyst is operable to reduce one or more constituents of the exhaust. | 03-15-2012 |
20120060474 | Exhaust Cooler - An internal combustion engine is coupled to an electric power generator. An exhaust manifold for the engine includes an exhaust gas conduit. A housing includes a catalyst in fluid communication with the conduit to receive exhaust produced by the engine. The catalyst is operable to reduce one or more constituents of the exhaust. | 03-15-2012 |
20120060475 | METHOD FOR ADAPTING AN EXOTHERMIC REACTION IN THE EXHAUST SYSTEM OF A MOTOR VEHICLE - A method for adapting a thermal model of a catalyst is provided. The method comprises adjusting an amount of exhaust gas reductant upstream of the catalyst based on a thermal model of the catalyst, the thermal model including heat input from exothermic catalyst reactions, an amount of the exothermic heat input adjusted responsive to an estimated temperature from the thermal model and a measured temperature downstream of the catalyst. In this way, a thermal model for catalyst activity and catalyst operating parameters may be adjusted to ensure optimal catalyst function. | 03-15-2012 |
20120060476 | METHOD FOR MONITORING THE POLLUTANT COVERSION CAPACITY IN AN EXHAUST GAS AFTER-TREATMENT SYSTEM - A method for monitoring a pollutant conversion capacity of a catalytically coated, oxidizing exhaust gas after-treatment component in an exhaust gas system of an internal combustion engine, wherein a capacity of the catalytic coating of the exhaust gas after-treatment component for oxidizing NO to NO | 03-15-2012 |
20120060477 | OPERATING METHOD FOR AN EXHAUST AFTERTREATMENT SYSTEM AND EXHAUST AFTERTREATMENT SYSTEM - An operating method of an exhaust gas aftertreatment system including at least a particulate filter for retaining soot from the exhaust gas of an engine and a deNOx catalytic converter for reducing nitrogen oxide in the exhaust gas of the engine is provided. Operation regimes of the particulate filter and of the deNOx catalytic converter are synchronized with respect to each other for performing regeneration of the particulate filter while the catalytic converter provides a nitrogen oxide conversion efficiency above a predetermined limit. | 03-15-2012 |
20120060478 | METHOD FOR DIAGNOSING A DIESEL OXIDATION CATALYST - A method and a control system are provided for diagnosing a diesel combustion catalyst that is located in an exhaust line within a diesel engine system. The method comprising providing an unburned fuel mass flow through the diesel oxidation catalyst, determining the oxidation heat release rate which is related to the exothermic oxidation reactions of the unburned fuel into the diesel oxidation catalyst, integrating the determined oxidation heat release rate on a time interval, integrating the unburned fuel mass flow on the same time interval, dividing the integrated value of oxidation heat release rate and the integrated value of unburned fuel mass flow for determining an efficiency index (DOI) of the diesel oxidation catalyst. | 03-15-2012 |
20120067026 | Exhaust Gas Treatment System for an Internal Combustion Engine - An exhaust gas treatment system for an internal combustion engine comprises an oxidation catalyst device configured to oxidize the hydrocarbon and carbon monoxide in the exhaust gas. A first temperature sensor is located downstream of the oxidation catalyst device and has a temperature probe that is in fluid communication with the exhaust gas flow exiting the oxidation catalyst device. A second temperature sensor is located downstream of the oxidation catalyst device and has a temperature probe that is in fluid communication with the exhaust gas flow exiting the oxidation catalyst device. The temperature probe includes a catalyst compound coating disposed thereon and is operable to catalyze the oxidation of CO and HC, or a combination thereof, that exits the oxidation catalyst device. A controller is in signal communication with temperature sensors and is configured to monitor signals from temperature sensors to determine if the temperature differential exceeds a predetermined threshold. | 03-22-2012 |
20120067027 | Exhaust Injection Muffler - An internal combustion engine is coupled to an electric power generator. An exhaust manifold for the engine includes an exhaust gas conduit. A housing includes a catalyst in fluid communication with the conduit to receive exhaust produced by the engine. The catalyst is operable to reduce one or more constituents of the exhaust. | 03-22-2012 |
20120067028 | AFTERTREATMENT CATALYST DEGRADATION COMPENSATION - One embodiment is a method including providing an aftertreatment catalyst disposed in an exhaust stream of an internal combustion engine and a reductant that reacts with an amount of NOx in the exhaust stream in the presence of the aftertreatment catalyst. The method includes interpreting a catalyst degradation value corresponding to the aftertreatment catalyst, and interpreting a nominal reductant value. The method further includes determining an adjusted reductant value in response to the catalyst degradation value and the nominal reductant value, and injecting the reductant into the exhaust stream at a rate based on the adjusted reductant value. | 03-22-2012 |
20120067029 | Method for Operating an Internal Combustion Engine - In a method for operating an air-compressing fuel-injection internal combustion engine having an exhaust gas post-treatment system with a particle filter and a nitrogen oxide reduction catalytic converter, a plurality of internal combustion engine operating settings are provided, each having respective predefined values for predefined internal combustion engine operating parameters. A heating operating setting is set when the internal combustion engine is warming up, while a basic operating setting is set in the warmed-up state. When the temperature in the exhaust gas system exceeds a predefinable first value, the heating operating setting is changed over to the basic operating setting. In the warmed-up state, at least one further (third) operating setting, with an exhaust gas recirculation rate that is reduced compared to the basic operating setting, is provided in addition to the basic operating setting. | 03-22-2012 |
20120067030 | METHOD FOR PURIFYING THE EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE HAVING A CATALYTIC CONVERTER - The present invention relates to a method for purifying the exhaust gases of an internal combustion engine having a catalytic converter which comprises oxygen storage components. The invention is concerned particularly with the restoration of the optimum filling degree of the oxygen storage components for regulated stoichiometric operation after the engine has been operated under lean conditions for a relatively short or relatively long period of time. | 03-22-2012 |
20120073264 | REDUCTANT DOSING SYSTEM - A reductant dosing system for an engine is disclosed. The reductant dosing system may have a supply of reductant, a reservoir configured to hold pressurized reductant, and a pump configured to draw reductant from the supply and discharge reductant at an elevated pressure into the reservoir. The reductant dosing system may also have a plurality of injectors fluidly connected to the reservoir, and a drain valve fluidly connected between the reservoir and the supply. | 03-29-2012 |
20120073265 | EXHAUST SYSTEM HAVING CROSS-SENSITIVE SENSOR - An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passage, a reduction catalyst disposed within the exhaust passage, and an injection device configured to inject reductant into the exhaust passage. The exhaust system may also have a sensor configured to generate a signal indicative of a concentration of an exhaust constituent and the reductant, and a controller in communication with the sensor and the injection device. The controller may be configured to make a comparison of a value indicative of a rate of change of the signal for a period of time with a threshold amount, and make a determination of whether the sensor is sensing a concentration of the exhaust constituent or the reductant based on the comparison. The controller may also be configured to adjust operation of the injection device based on the determination. | 03-29-2012 |
20120073266 | Process for the Removal of Harmful Substances from Exhaust Gases of Combustion Engines and Catalyst for Carrying Out Said Process - An integrated system for treatment of exhaust gases includes a NO | 03-29-2012 |
20120079811 | CONTROL SYSTEM FOR A TWO-STROKE LOCOMOTIVE DIESEL ENGINE HAVING AN EXHAUST AFTERTREATMENT SYSTEM - The present application generally relates to a diesel engine and, more particularly, to a control system and method for an exhaust aftertreatment system for a locomotive diesel engine. In accordance with an embodiment of the present system, a two-stroke uniflow scavenged diesel engine system including an exhaust aftertreatment system is described for reducing NO | 04-05-2012 |
20120079812 | EXHAUST GAS PURIFICATION APPARATUS OF ENGINE AND EXHAUST GAS PURIFICATION METHOD OF ENGINE - A control unit calculates an amount of produced ammonia from an amount of a dosed urea aqueous solution according to an engine operation state, and calculates a NOx purification ratio in the case of dosing the amount of the dosed urea aqueous solution according to the operation state to exhaust gas on an exhaust upstream side of an SCR catalyst. Moreover, the control unit estimates an amount of adsorbed ammonia to the SCR catalyst based on the produced ammonia amount and the NOx purification ratio. Then, the control unit subtracts the amount of the urea aqueous solution corresponding to the amount of the adsorbed ammonia from the amount of the dosed urea aqueous solution according to the operation state to correct the amount of the dosed urea aqueous solution, and controls the dosing of the urea aqueous solution based on the corrected amount of the dosed urea aqueous solution. | 04-05-2012 |
20120085080 | FUEL-FIRED BURNER AND HEAT EXCHANGER SYSTEM FOR HEATING A NOx REDUCING AGENT SUPPLY TANK - A fuel-fired burner in a vehicle exhaust system is used to heat up a frozen NOx reducing agent supply tank within a predetermined target amount of time. A method and apparatus are used to identify when a supply of agent is below a predetermined temperature, and the fuel-fired burner is activated for a sufficient amount of time to raise a temperature of the agent to at least the predetermined temperature with the predetermined target amount of time. | 04-12-2012 |
20120085081 | Emissions reductions through reagent release control - One embodiment is a method including determining whether an ammonia storage device has a stored quantity of ammonia, predicting an impending ammonia release from the ammonia storage device, determining a NO | 04-12-2012 |
20120085082 | SYSTEM AND METHOD FOR DETECTING LOW QUALITY REDUCTANT AND CATALYST DEGRADATION IN SELECTIVE CATALYTIC REDUCTION SYSTEMS - A control system for a selective catalytic reduction (SCR) system includes a conversion efficiency determination module, an ammonia slip determination module, and a diagnostic module. The conversion efficiency determination module determines a conversion efficiency of an SCR catalyst. The ammonia slip determination module determines an amount of ammonia slip across the SCR catalyst when the conversion efficiency is less than a predetermined threshold. The diagnostic module determines pass/fail statuses of a reductant supply and the SCR catalyst based on the amount of ammonia slip and at least one ammonia slip threshold. | 04-12-2012 |
20120085083 | SCR AMMONIA SLIP DETECTION - In one implementation of the disclosed technique, a NOx sensor polynomial algorithm is used to discriminate between NOx and ammonia emission. The polynomial algorithm uses the SCR's time constant property to infer the “loading state” of the SCR and estimate both the NOx conversion and quantity of ammonia slip. The polynomial algorithm assesses this by differentially analyzing the upstream and downstream NOx sensor signals through a comparison of the polynomial coefficients. | 04-12-2012 |
20120090294 | CONTROL OF AFTERTREATMENT REGENERATION IN A HYBRID POWERED VEHICLE - A method for controlling aftertreatment regeneration for a system having a hybrid powertrain is described. The method includes determining that an engine aftertreatment regeneration is indicated when a regeneration request index exceeds a first threshold. The method includes determining an acceptable battery usage amount based on a current battery state of charge (SOC) and a minimum battery SOC. The method further includes determining a battery usage amount for an engine aftertreatment regeneration operation. The method includes initiating an engine aftertreatment regeneration when the battery usage amount is less than or equal to the acceptable battery usage amount. | 04-19-2012 |
20120090295 | EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - An exhaust system for an internal combustion engine is provided. The engine comprises an exhaust line, at least one exhaust gas aftertreatment device arranged in the exhaust line, and a heat source and a heat sink arranged in separate branches of the exhaust line upstream of the exhaust gas aftertreatment device, an exhaust gas flow rate through each respective separate exhaust branch controlled by at least one flow control device. In this way, the temperature of the exhaust entering the aftertreatment device may be controlled by an amount of exhaust that flows through each branch of the exhaust line. | 04-19-2012 |
20120090296 | METHOD FOR MEASURING THE QUALITY OF AMMONIA INJECTION FOR AN EXHAUST GAS AFTER TREATMENT SYSTEM OF A VEHICLE - A system and method for determining ammonia deposition and controlling an engine is described. In one example, an amount of ammonia deposited in an engine exhaust is determined and the deposited ammonia is purged after the amount of ammonia deposited reaches a threshold level. The method may decrease ammonia use and ammonia emissions from a vehicle. | 04-19-2012 |
20120090297 | METHOD FOR ADAPTING A LEAN NOX TRAP IN AN EXHAUST SYSTEM OF A MOTOR VEHICLE - A method for adapting a lean NOx trap (LNT) in an exhaust system of a motor vehicle is provided. The method comprises if a difference between an estimated NOx concentration and a measured NOx concentration in exhaust downstream of the LNT is greater than a threshold, calculating an adaptation value, the estimated NOx concentration downstream of the LNT based on a kinetic model, and adapting the kinetic model, adjusting one or more operating parameters of the LNT, and indicating an aging state of the LNT based on the adaptation value. In this way, the model may be updated in real time to produce a robust prediction of LNT function. | 04-19-2012 |
20120090298 | ENGINE COMBUSTION CONDITION AND EMISSION CONTROLS - Features relating to engine efficiency and emissions controls are described. Systems, methods, articles or manufacture and the like can include features relating to integrated muffler and emissions controls for engine exhaust, water-injected internal combustion engine with an asymmetric compression and expansion ratio, controlled combustion durations for HCCI engines, piston shrouding of sleeve valves, low element count bearings, improved ports, and premixing of fuel and exhaust. | 04-19-2012 |
20120090299 | Method to reduce the ignition temperature of soot being accumulated on a particulate trap - A method for lowering the ignition temperature of soot accumulated on a particulate filter | 04-19-2012 |
20120090300 | TURBO SCREEN - The present invention generally relates to methods and apparatus for use in exhaust manifold assemblies of large diesel engines, such as ships, locomotives and the like. In one aspect, a screen for use in an exhaust manifold assembly is provided. The screen includes a plate formed in a concave shape. The plate has a plurality of apertures and a plurality of radially oriented closed slots formed therein. The screen further includes a band on an outer perimeter of the plate. In another aspect, a reducer assembly for use in an exhaust manifold assembly is provided. In yet a further aspect, a method of using a screen in an exhaust manifold assembly is provided. | 04-19-2012 |
20120096834 | OPTIMIZED ELECTRICALLY HEATED EXHAUST GAS TREATMENT SYSTEM - A method of sizing a light-off core supporting a fixed quantity of a light-off catalyst for an exhaust gas treatment system having an electric heater upstream of the light-off catalyst for heating the exhaust gas includes measuring the cumulative hydrocarbon or carbon monoxide emissions leaving the exhaust gas treatment system for multiple volumetric sizes of the light-off core in accordance with a heating strategy. Alternatively, a model of the treatment system may be used to predict the cumulative hydrocarbon or carbon monoxide emissions. The method further includes selecting the volumetric size of the light-off core that is associated with the lowest cumulative hydrocarbon or carbon monoxide emissions level from the measured or predicted hydrocarbon or carbon monoxide emissions when the exhaust gas is heated in accordance with the heating strategy. The heating strategy may include pre-crank heating, post-crank heating, or a combination of pre-crank heating and post crank heating. | 04-26-2012 |
20120096835 | FEEDFORWARD SELECTIVE CATALYTIC REDUCTION SYSTEM FOR TURBINE ENGINES - A system and method of treating an exhaust flow including nitrogen oxides (NOx) in a turbine engine power generation plant is provided. The turbine engine has a selective catalytic reduction system having a catalyst. During steady state operation of the engine, a reducing agent, such as ammonia, is supplied to an injector in an amount based on a measured molar flow of NOx in the exhaust flow. During a disturbance in the operation of the turbine engine, a reducing agent is supplied to the injector in an amount based on a predicted molar flow of NOx in the exhaust flow. In addition, the system can include a biasing feature in which additional reducing agent is supplied to the exhaust flow beyond the predicted molar flow of NOx. The system and method can mitigate NOx during transient engine operation, an operational mode in which emissions are difficult to predict and control. | 04-26-2012 |
20120096836 | METHOD OF MONITORING POLLUTANT EMISSIONS OF A COMBUSTION ENGINE - The invention relates to a method for monitoring the pollutant emissions of a combustion engine comprising at least one piston, the translatable movement of which defines a combustion chamber, said engine being combined with an exhaust line that, in the direction of exhaust gas flow, comprises an oxidation catalyst, an NOx reduction catalyst, and a particle filter, the method being characterized by the use of a fuel comprising an additive assisting in soot combustion when re-refined by the particle filter, and according to at least one operating mode of the engine, the fuel is injected in accordance with a calibration minimizing carbon dioxide discharges by the engine. | 04-26-2012 |
20120096837 | METHOD FOR ADAPTING AN SCR CATALYTIC CONVERTER IN AN EXHAUST SYSTEM OF A MOTOR VEHICLE - A method for adapting a kinetic model of a SCR is described. In one example, the kinetic model is adapted for stored ammonia, ammonia release rate, and ammonia storage capacity. The method may be useful for adjusting engine control parameters for the purpose of reducing engine emissions. | 04-26-2012 |
20120096838 | ARRANGEMENT AND METHOD FOR TREATMENT OF EXAHUST GASES - An exhaust gas treatment arrangement and a method thereof is contemplated for treating exhaust gases flowing along a flow path in an exhaust pipe system. The arrangement comprises a supply element being in communication with a source comprising an ammonia gas. The supply element comprises at least two discharge apertures being adapted to communicate with the flow path such that the ammonia gas may be dispersible from the discharge apertures into the exhaust gases in the flow path in at least two discharge directions. | 04-26-2012 |
20120102920 | POWER SYSTEM WITH CYLINDER-DISABLING STRATEGY - A power system for use with an engine having at least one cylinder, and a piston, a fuel injector, and an exhaust valve associated with the at least one cylinder, is disclosed. The power system may have an exhaust passage, an aftertreatment component disposed within the exhaust passage, and a valve actuator configured to selectively move the exhaust valve. The power system may also have a controller in communication with the fuel injector and the valve actuator. The controller may be configured to make a determination to heat the aftertreatment component, to activate the valve actuator to hold open the exhaust valve as the piston moves through a top-dead-center position to disable the at least one cylinder based on the determination, and to activate the fuel injector to inject fuel into the at least one cylinder while the at least one cylinder is disabled. | 05-03-2012 |
20120102921 | SYSTEM AND METHOD FOR CONTROLLING REGENERATION OF AN EXHAUST AFTER-TREATMENT DEVICE - A method for controlling regeneration of an exhaust after-treatment device for an internal combustion engine in a vehicle includes establishing a baseline value for a mass of soot collected in the exhaust after-treatment device. The baseline value is a threshold mass of soot to be reached for regenerating the filter, and is determined as a function of a speed of the engine and a quantity of fuel entering the engine. The method also includes modifying the baseline value in response to an engine operating parameter that alters a fuel-air ratio of a combustible mixture entering the engine to generate a modified baseline value. The method additionally includes regenerating the exhaust after-treatment device using the modified baseline value. A system for controlling regeneration of an exhaust after-treatment device for an internal combustion engine is also provided. | 05-03-2012 |
20120102922 | METHOD OF SIZING A HEATING CORE OF AN EXHAUST HEATER FOR AN EXHAUST TREATMENT SYSTEM OF A VEHICLE - A method of sizing a heating core of an exhaust heater for an exhaust gas treatment system includes measuring the cumulative hydrocarbon or carbon monoxide emissions from the exhaust gas for multiple volumetric sizes of the heating core when heated in accordance with a heating strategy. Alternatively, a model of the treatment system may be used to predict the cumulative hydrocarbon or carbon monoxide emissions. The method further includes selecting the volumetric size of the heating core that is associated with the lowest cumulative hydrocarbon or carbon monoxide emissions level from the measured or predicted hydrocarbon or carbon monoxide emissions when the exhaust gas is heated in accordance with the heating strategy. The heating strategy may include pre-crank heating, or a combination of pre-crank heating and post-crank heating. | 05-03-2012 |
20120102923 | AFTER-TREATMENT HEATING WITH ENGINE COMBUSTION FEEDBACK - A method of operating an engine having an after-treatment system that treats exhaust gas from the engine with an oxidation catalyst includes adjusting the operation of the engine to increase the temperature of the exhaust gas, continuously sensing a cylinder pressure with a pressure sensor disposed at at least one cylinder of the engine to identify a unstable combustion event, i.e., an engine misfire, and adjusting the operation of the engine to prevent a future unstable combustion event when the unstable combustion event is detected. | 05-03-2012 |
20120102924 | Method And Device For Measuring The Soot Load In The Exhaust Gas Systems Of Diesel Engines - A method and device for measuring the soot load in the exhaust gas systems of diesel engines using a sensor which is mounted downstream of a particulate filter and comprises a sensor element, to measure the operability of the particulate filter. According to the method, the soot load of the sensor element is measured resistively or capacitively using electrodes. The measuring voltage of the sensor element is controlled depending on at least one actual operating parameter of the diesel engine. | 05-03-2012 |
20120102925 | ENGINE EXHAUST TEMPERATURE REGULATION - In one example, a method of operating an engine in a vehicle is described. The method comprises delivering a first substance to a cylinder of the engine from a first injector; delivering a second substance to the cylinder of the engine from a second injector, where the second substance has a greater heat of vaporization than the first substance; and increasing injection of the second substance responsive to an exhaust over-temperature condition. | 05-03-2012 |
20120110981 | Reduction of NOx Trap at Engine Shutoff - The reduction of a NOx trap upon engine shutdown is disclosed. One disclosed embodiment comprises adjusting a timing of creating a reductive environment in the exhaust conduit upstream of the lean NOx trap based upon the determined engine stop position. The creation of a reductive environment in the exhaust conduit upstream of the lean NOx trap may help to at least partially reactivate the lean NOx trap during engine shutoff. | 05-10-2012 |
20120117945 | SYSTEM AND METHOD FOR SENSING PARTICULATE MATTER - A computerized method includes receiving signals from a particulate matter sensor relating to an amount of particulates at a point in time within a time period in a diesel engine exhaust stream, calculating one or more running statistical parameters relating to a particle mass in the diesel engine exhaust stream, determining an upper control limit for the amount of particulates, receiving a threshold for an allowable amount of particulates in the diesel engine exhaust stream, comparing the threshold to one or more of (a) a current instantaneous particulate reading from the particulate matter sensor and (b) the upper control limit for the amount of particulates, and generating an output signal when one or more of the current instantaneous particulate reading and the upper control limit for the amount of particulates are above the threshold. | 05-17-2012 |
20120117946 | CONTROL METHOD AND APPARATUS FOR REGENERATING A PARTICULATE FILTER - Control methods for regenerating particulate filter and an apparatus that includes an internal combustion engine, an exhaust gas conduit in fluid communication with and configured to receive exhaust gas from the internal combustion engine, and a particulate filter assembly in fluid communication with the exhaust gas conduit and configured to receive exhaust gas flowing therethrough. The particulate filter assembly includes a particulate filter to remove particulates from the exhaust gas, a heater device disposed near a front face of the particulate filter, to supply heat for regeneration of the particulate filter after shut-off of the internal combustion engine, and an air pump to input air into the particulate filter to transfer the supplied heat from the heater device to the particulate filter. | 05-17-2012 |
20120117947 | NOx ADSORBER REGENERATION SYSTEM AND METHOD - An exhaust gas after treatment system for an engine comprises an oxidation catalyst NOx adsorber wherein an oxidation catalyst compound and a NO | 05-17-2012 |
20120117948 | EXHAUST GAS AFTERTREATMENT - A method to improve NO | 05-17-2012 |
20120117949 | EXHAUST GAS AFTERTREATMENT SYSTEM - The invention relates to an exhaust gas post treatment system for an internal combustion engine, including an intake device for taking hydrocarbons into an exhaust gas pipe carrying the exhaust process gas from the internal combustion engine and a treatment device through which exhaust process gas flows downstream of the intake location and which increases the exhaust process gas temperature by means of oxidation of the hydrocarbons taken in. The invention specifies an exhaust gas post treatment system and a method for operating such an exhaust gas post treatment system which can be implemented cost-effectively. This is achieved in that the treatment device has catalytically coated components, in that the hydrocarbons are at least partly evaporated in the intake device and are modified chemically by means of cracking reactions and/or by means of partial oxidation, and in that the proportion of platinum, at least in a subregion of the catalytic coating of the components, is less than 50% of the overall mass of all the catalytically active substances in this sub region of the coating. | 05-17-2012 |
20120124966 | METHOD OF DIESEL PARTICULATE FILTER (DPF) TO CALCULATE ACTUAL SOOT LOAD AND ASH LOAD OF THE FILTER - A method to operate an internal combustion engine with a diesel particulate filter to extend the life of the diesel particulate filter by initiating active regeneration of the diesel particulate filter when the soot load of the filter exceeds a predetermined actual soot load value. | 05-24-2012 |
20120124967 | Adaptive Control Strategy - A vehicle has an exhaust aftertreatment system including an LNT. The vehicle operates through a series of ignition cycles, deNO | 05-24-2012 |
20120124968 | MIXING PIPE FOR SCR MUFFLERS - An apparatus for treating exhaust includes a housing having an inlet and an outlet, the housing defining a chamber. The inlet is in fluid communication with a source of exhaust. A mixing tube is connected to the inlet. The mixing tube has at least two branches and a plurality of apertures defined in a wall of the mixing tube. A substrate is disposed between the mixing tube and the outlet. The at least two branches converge at an end section of the mixing tube to form a mixing loop. | 05-24-2012 |
20120124969 | DEVICE AND METHOD FOR COMBUSTING PARTICULATE SUBSTANCES - It is possible to provide a device and a method for combusting particulate substances which particulate matters discharged from an internal combustion engine can be effectively combusted, and the device configuration is simple and does not become large and heavy. The combustion device has: an introduction portion | 05-24-2012 |
20120131905 | EXHAUST GAS POST PROCESSING METHOD - An exhaust gas post processing method may include determining whether a driving condition is included in an area for monitoring a rapid-heat-up (RHU) logic process that is used to quickly raise a temperature of exhaust gas passing an exhaust line, detecting on/off signal that performs or stops the rapid-heat-up logic process, determining whether an injection signal for performing the rapid-heat-up logic process is activated or not, detecting error of components for performing the rapid-heat-up logic process, and detecting the temperature of the exhaust during the rapid-heat-up logic process and comparing the detected temperature with a modeled value. | 05-31-2012 |
20120131906 | Exhaust Gas Aftertreatment Method - An exhaust gas aftertreatment method may include a regenerating a diesel particulate filter normally, accumulating a time from a point that the diesel particulate filter starts to be regenerated, determining whether the diesel particulate filter enters into an abnormal regeneration condition or not according to a predetermined condition of an engine, and regenerating the diesel particulate filter according to the abnormal regeneration logic, if the accumulated time is within a predetermined time in a condition that the abnormal regeneration condition is satisfied and regenerating the diesel particulate filter according to the normal regeneration logic, if the accumulated time is out of the predetermined time. Accordingly, if the time elapses a predetermined time from a point that that the diesel particulate filter starts to be regenerated, although the vehicle enters into the idle condition or the over-run condition, the abnormal regeneration logic is not performed such that the fuel consumption is saved and the diesel particulate filter is safely regenerated. | 05-31-2012 |
20120137657 | SCR CLOSED LOOP CONTROL SYSTEM - A method for an exhaust after treatment system of an engine including at least one selective catalyst reaction (SCR), at least one clean up catalyst downstream from the SCR, a urea injector upstream of the SCR and a first NOx sensor downstream the clean up catalyst. The method includes the steps of injecting a predetermined amount of urea by the injector, providing a second NOx sensor between the SCR and the clean up catalyst, measuring the NOx content received by the first NOx sensor, measuring the NOx content received by the second NOx sensor, comparing the first and the second NOx content with each other, and reducing the predetermined amount of urea if the first NOx sensor measures a higher NOx content than the second NOx sensor. | 06-07-2012 |
20120137658 | Temp-A-Start Regeneration System - A regeneration module is usable in conjunction with a diesel engine to control the operation of a regeneration cycle of the diesel engine. During the regeneration cycle, particulate matter collected in or on a diesel particulate filter of the diesel engine is removed to improve the operation of the diesel particulate filter. In various embodiments, the regeneration module only functions when manually activated by a user of the diesel engine such that the regeneration cycle is only initiated during desirable idle periods of the diesel engine. | 06-07-2012 |
20120137659 | Hydrocarbon Retaining System Configuration for Combustion Engine - Systems, methods, and computer readable storage media are described in which exhaust gas is routed to a hydrocarbon retaining device during starting, and purged to the engine intake manifold. Various alternative approaches are described for controlling operation and diagnosing degradation. Further, various interrelated configurations are described. | 06-07-2012 |
20120144801 | SYSTEM AND METHOD FOR DETERMINING SELECTIVE CATALYTIC REDUCTION DOSING SYSTEM PERFORMANCE USING AN AMMONIA SENSOR - A control system for a selective catalytic reduction (SCR) system includes a dosing control module, a comparison module, and a status determination module. The dosing control module controls a dosing system to inject a desired amount of ammonia into exhaust gas at a first location in an exhaust stream. The comparison module compares a measured amount of ammonia in the exhaust gas to the desired amount of ammonia, wherein the measured amount of ammonia is measured at a second location downstream from the first location and upstream from or within an SCR catalyst. The status determination module determines a pass/fail status of a component of the dosing system based on the comparison between the measured amount of ammonia and the desired amount of ammonia. | 06-14-2012 |
20120144802 | EXHAUST SYSTEM HAVING DOC REGENERATION STRATEGY - An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passage configured to receive a flow of exhaust from the combustion engine, and an oxidation catalyst disposed within the exhaust passage. The exhaust system may also have a fuel injector configured to selectively inject fuel into the exhaust at a location upstream of the oxidation catalyst, a temperature sensor configured to generate a signal indicative of a temperature of exhaust flowing through the exhaust passage, and a controller in communication with the fuel injector and the temperature sensor. The controller may be configured to make a determination based on the signal that an oxide layer has formed on the oxidation catalyst, and to regulate operation of the fuel injector to inject fuel and reduce the oxide layer based on the determination. | 06-14-2012 |
20120144803 | Method Of Operating A Fuel Processor Intermittently - In situations where the demand for syngas is intermittent, a fuel processor is operated to provide a high absolute hydrogen and carbon monoxide production, rather than to give a high fuel-specific hydrogen and carbon monoxide production. When a syngas generator is operated to intermittently produce syngas, a heating process can be performed between periods of syngas demand in order to keep the fuel processor within a desired temperature range. The heating process can comprise various steps or events including performing a heating event, allowing a standby period, and/or performing a carbon conversion event. Carbon formed during the process of converting fuel to syngas can be advantageously converted to maintain the temperature of the fuel processor within a desired range in between periods of syngas demand. A predictive method can be employed to control at least a portion of the heating process. | 06-14-2012 |
20120144804 | METHOD AND DEVICE FOR CONTROLLING THE TEMPERATURE OF EXHAUST GAS FROM AN INTERNAL-COMBUSTION ENGINE FLOWING THROUGH A MEANS OF TREATING THE POLLUTANTS CONTAINED IN THIS GAS - The present invention relates to a method for controlling the temperature of exhaust gas circulating in an exhaust line ( | 06-14-2012 |
20120144805 | ARRANGEMENT AND METHOD FOR OPERATING AN EXHAUST GAS POST-TREATMENT DEVICE - The invention relates to an arrangement ( | 06-14-2012 |
20120151900 | SYSTEM AND METHOD FOR UNLOADING HYDROCARBON EMISSIONS FROM AN EXHAUST AFTER-TREATMENT DEVICE - A method unloads hydrocarbon emissions deposited by an exhaust gas on an after-treatment device that is employed in an exhaust system for an internal combustion engine. The method includes determining whether the engine has been operating at a preset idle speed for a predetermined amount of time. The method also includes increasing the preset idle speed by a predetermined value if the engine has been operating at a preset idle speed for a predetermined amount of time. The increasing of the engine idle speed increases a flow rate of the exhaust gas to the after-treatment device and unloads the deposited hydrocarbon emissions. A system for unloading hydrocarbon emissions deposited on an after-treatment device and a vehicle employing such a system are also disclosed. | 06-21-2012 |
20120159927 | PEROVSKITE OXIDE COMPOUNDS FOR USE IN EXHAUST AFTERTREATMENT SYSTEMS - A method for removing NO | 06-28-2012 |
20120159928 | System and method for introducing a reductant agent - A system and method controls injection of a reductant agent in a selective catalytic reduction system. The system and method include an injector injecting the reductant agent to an exhaust system directing exhaust from a power system. A coolant system circulates coolant proximate to the injector. A coolant temperature sensor monitors a coolant temperature of the coolant. A controller adjusts the injection timing of the injector based at least in part on the coolant temperature. | 06-28-2012 |
20120159929 | EXHAUST PARTICULATE FILTER SYSTEM AND METHODS - A method of operating an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy, for example having a frequency above about 2 GHz through an exhaust particulate filter containing trapped soot. The transmitted electromagnetic energy may be attenuated in response to the trapped soot, and a filter soot loading value calculated based at least in part upon a correlation among an attenuation of the electromagnetic energy, a temperature of the filter, and a mass of the trapped soot. An algorithm based upon a partial derivative of an equation representing the correlation may be used in calculating the filter soot loading value, and a resulting soot mass. Responsive to determining the calculated soot mass satisfies regeneration suitability conditions, a regeneration initiation command may be outputted. | 06-28-2012 |
20120159930 | Exhaust Particulate Filter System And Operating Method Therefor - A method of operating an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy, for example having a frequency above about | 06-28-2012 |
20120159931 | EXHAUST SYSTEM AND HEATING-UP METHOD - The present invention relates to an exhaust system for a combustion engine, particularly of a vehicle, with an oxidation catalytic converter (oxicat), with an electrically heatable catalytic converter (E-cat) arranged upstream of the oxicat and with a fuel injector arranged upstream of the E-cat. | 06-28-2012 |
20120159932 | ARRANGEMENT AND METHOD FOR OPERATING AN EXHAUST GAS AFTERTREATMENT DEVICE - The invention relates to an arrangement ( | 06-28-2012 |
20120159933 | MODELING CATALYST EXOTHERM DUE TO BLOWTHROUGH - Modeling catalyst exotherm due to blowthrough is provided. The method of advantageously utilizes catalyst temperature based on an amount of blowthrough air and a combustion air-fuel ratio generating a catalyst exotherm. | 06-28-2012 |
20120167553 | EXHAUST AFTERTREATMENT SYSTEMS THAT INCLUDE AN AMMONIA-SCR CATALYST PROMOTED WITH AN OXYGEN STORAGE MATERIAL - A low-oxygen content exhaust flow produced by an engine that is combusting, on average, a stoichiometric mixture of air and fuel generally contains various unwanted gaseous emissions. The exhaust flow is treated by an exhaust aftertreatment system that includes a three-way-catalyst (TWC) and an ammonia-selective catalytic reduction (ammonia-SCR) catalyst positioned downstream from the TWC in a flow direction of the exhaust flow. The ammonia-SCR catalyst includes (1) a base metal ion-substituted zeolite and/or a base metal ion-substituted silicoaluminophosphate and (2) an oxygen storage material selected from the group consisting of a metal oxide or a mixed metal oxide that exhibits oxygen storage and release capacity. The serial arrangement of the TWC and the ammonia-SCR catalyst enhances the conversion of NO | 07-05-2012 |
20120167554 | HYBRID ENGINE AFTERTREATMENT THERMAL MANAGEMENT STRATEGY - A system includes an internal combustion engine producing exhaust gases as a byproduct of operation and an aftertreatment system that treats the exhaust gases. The system further includes a controller that is structured to functionally execute operations to enhance the temperature of the aftertreatment system. The controller includes an operating condition monitoring module that interprets a temperature value at a position upstream of a catalyst positioned in the aftertreatment system. The controller further includes an operating condition management module that interprets a threshold temperature value, and an engine management module that provides an engine operation command to continue engine operation in response to the temperature value being at least equal to the threshold temperature value. | 07-05-2012 |
20120167555 | APPARATUS, SYSTEM, AND METHOD FOR ADAPTIVE ENGINE SYSTEM CONTROL WITH INTEGRATED GLOBAL POSITION SENSING - According to one embodiment, an apparatus includes an electronic controller ( | 07-05-2012 |
20120167556 | ENGINE EXHAUST AFTER-TREATMENT SYSTEM - An engine exhaust after-treatment system is provided, which may include a particulate trap configured to remove at least some constituents of the exhaust flowing from an engine through an exhaust system. The system may also include a controller configured to collect in-service data related to an operating parameter indicative of the amount of time the engine operates. In addition, the system may include a memory device attached to the particulate trap and including a memory. The memory may be configured to store usage data indicative of how much time the particulate trap has been used in service. The memory may be configured to communicate with the controller to receive information related to the in-service data collected by the controller and update the usage data in the memory, based on the communication with the controller, to reflect a total amount of time the particulate trap has been in service. | 07-05-2012 |
20120174561 | Reductant delivery device - Various diffusion apparatuses are provided for facilitating the injection of a nitrogen-oxides reductant solution, such as urea, into exhaust gas as part of a selective catalytic reduction system. These diffusion apparatuses direct exhaust gas from an exhaust pipe, through a conduit, and into a diffusion chamber where urea is injected. The flow of exhaust gas through the conduit provides improved transport of injected reductant solution into the exhaust pipe, and adhesion of the reductant solution to the walls of the diffusion chamber is reduced. | 07-12-2012 |
20120174562 | EXHAUST GAS PURIFICATION APPARATUS AND EXHAUST GAS PURIFICATION METHOD FOR AN INTERNAL COMBUSTION ENGINE - A detection unit that is arranged in an exhaust passage of an internal combustion engine configured to detect a state of the exhaust gas, addition unit configured to add the additive agent into the exhaust passage, a catalyst that is arranged at the downstream side of the detection unit and the addition unit so as to receive a supply of the additive agent from the addition unit, determination unit configured to determine whether detection accuracy of the detection unit drops due to the additive agent to be added from the addition unit, and stop unit configured to stop detection of the state of the exhaust gas by the detection unit in cases where it is determined by the determination unit that the detection accuracy of the detection unit drops. | 07-12-2012 |
20120174563 | Device and Method for Regulating the Injection of a Quantity of Reducer in the Gaseous Phase - The invention relates to a device ( | 07-12-2012 |
20120174564 | SYSTEM FOR AN ENGINE HAVING A PARTICULATE MATTER SENSOR - A system for improving operation of an engine having a particulate matter sensor is presented. The system may be used to improve engine operation during cold starts especially under conditions where water vapor or entrained water droplets are present in vehicle exhaust gases. In one embodiment, an engine controller that activates a heater of an exhaust gas sensor after an output of a particulate matter sensor exceeds a threshold value after an engine is started. | 07-12-2012 |
20120180453 | SULFUR-TOLERANT PEROVSKITE NOx OXIDATION CATALYSTS - A method for catalytic oxidation of NO to NO | 07-19-2012 |
20120180454 | METHOD FOR CONTROLLING THE REGENERATION PROCESS IN LNT DEVICES - A method is provided for controlling the regeneration process of a LNT device for the treatment of exhaust produced by an internal combustion engine. The method includes, but is not limited to storing a plurality of parameters in the form of preset values which relate to admissible regenerating conditions, receiving a regeneration request, measuring the current values of the parameters to define the current operating conditions of the engine and the LNT device, comparing the current values with the preset values of a corresponding parameter to evaluate if the current operating conditions of the engine and of the LNT device satisfy the admissible regenerating conditions for carrying out the regeneration process, and inhibiting the regeneration process if at least one current value of a corresponding parameter does not satisfy the admissible regenerating conditions for carrying out the regeneration process. | 07-19-2012 |
20120180455 | METHOD FOR DIAGNOSING AN EXHAUST GAS POST-TREATMENT - Method for the on-board diagnosis of an exhaust gas post-treatment device for a combustion engine, wherein the exhaust gas post-treatment device has means for converting an exhaust gas component and wherein sensor means are provided downstream of the exhaust gas post-treatment device, wherein the exhaust gas component is acquired by the sensor means and that by means of the quantity of the acquired exhaust gas component the quality of the means for converting the exhaust gas component is derived, wherein a signal of the sensor means is transmitted to a system for the on-board diagnosis. | 07-19-2012 |
20120180456 | EXHAUST GAS TREATMENT METHOD AND DEVICE FOR INTERNAL COMBUSTION ENGINE - An object is to prevent a large quantity of unburned HC components from being released to the outside until a diesel oxidation catalyst reaches an activation temperature after early post-injection. In the present invention, by reducing a throttle opening of a variable throttle mechanism | 07-19-2012 |
20120186225 | Methods And Apparatus To Detect And Inhibit Low-Speed Pre-Ignition In An Engine - The disclosure provides a method of detecting and inhibiting an abnormal combustion event in an internal combustion engine, comprising operating the internal combustion engine to produce exhaust gas from the cylinder at a break mean effective pressure greater than or equal to 10 bars at a speed less than or equal to 2,000 revolutions per minute; monitoring the exhaust gas from the cylinder with an oxygen sensor while the internal combustion engine undergoes a pre-ignition combustion event; obtaining an output from the oxygen sensor, the output from the oxygen sensor providing an indicator of the pre-ignition combustion event; and adjusting at least one operating parameter of the internal combustion engine in response to the output of the oxygen sensor, wherein the at least one operating parameter is adjusted to inhibit an occurrence of a subsequent pre-ignition combustion event. | 07-26-2012 |
20120186226 | APPARATUS AND METHOD FOR ONBOARD PERFORMANCE MONITORING OF OXIDATION CATALYST - A method and system for determining conversion of NO to NO | 07-26-2012 |
20120186227 | PARTICLE SENSOR, EXHAUST SYSTEM AND METHOD FOR DETERMINING PARTICLES IN THE EXHAUST GAS - Embodiments of a particle sensor are provided. In one example, a particle sensor for an exhaust system comprises at least two inlet openings for an exhaust-gas flow of the exhaust system, wherein the inlet openings are of different sizes, and at least two sensor elements, wherein in each case one sensor element is arranged downstream of one inlet opening. In this way, the relative proportion of different-sized particles within the exhaust-gas flow may be determined. | 07-26-2012 |
20120186228 | PARTICLE FILTER AND METHOD FOR THE PURIFICATION OF AN EXHAUST-GAS FLOW - Particle filters and a method for the purification of an exhaust-gas flow are described. In one example, exhaust gas is directed solely to a first particulate filter until a predetermined condition. Then exhaust gas is directed to a second particulate filter. One particulate filter may surround the other of two particulate filters. The particulate filters may provide filtered exhaust gas even when one filter becomes at least partially loaded. | 07-26-2012 |
20120186229 | ZONED CATALYTIC FILTERS FOR TREATMENT OF EXHAUST GAS - Provided is an SCRF article having different SCR catalysts compositions disposed on a wall-flow filter substrate in zones that are arranged in series with respect to the inlet and outlet faces of the substrate. Also provided is method of reducing backpressure and ammonia slip that involves the use of such SCRF articles. | 07-26-2012 |
20120186230 | DETECTION APPARATUS - A detection apparatus includes a detection unit, a control unit, a first setting unit, and a second setting unit. The detection unit is disposed in an exhaust path through which an exhaust gas flows, and detects a correlation value correlated with an amount of particulate matter (PM) attaching to an attachment element. The control unit controls a temperature of the attachment element to follow a target temperature while a regeneration process is performed to heat the attachment element so as to burn PM. The first setting unit sets the target temperature to be lower, as the amount of PM becomes larger. The second setting unit sets a completion timing of the regeneration process so that a period of the regeneration process becomes longer, as the amount of PM becomes larger or a temperature of the attachment element becomes lower while the regeneration process is performed. | 07-26-2012 |
20120186231 | EXHAUST GAS AFTER TREATMENT SYSTEM WITH TEMPERATURE CONTROL - A vehicle emission control system is configured to operatively receive exhaust gas from a combustion engine and includes an exhaust gas after treatment system (EATS) configured to operatively clean the received exhaust gas, a burner unit configured to operatively heat the received exhaust gas to a predetermined temperature before the exhaust gas is provided to the EATS, and a pump unit configured to operatively provide the burner unit with air to be used by the burner unit in a heating process. The pump unit is configured to be operatively propelled by exhaust gas, and the burner unit is arranged upstream the pump unit such that exhaust gas from the burner unit is operatively provided to the pump unit for propelling the pump unit. | 07-26-2012 |
20120186232 | Method for Controlling Injection Amount of Fuel of Burner and Aftertreating Device of Exhaust Gas - Disclosed is a method for controlling an injection amount of fuel of a burner and an aftertreating device of exhaust gas, and more particularly, to a method for controlling an injection amount of fuel of a burner and an aftertreating device of exhaust gas, in which the burner is controlled in consideration of exothermic effect due to a catalytic filter, thereby stably reducing exhaust gas. | 07-26-2012 |
20120186233 | DEVICE AND METHOD FOR TREATING EXHAUST GAS CONTAINING SOOT PARTICLES AND MOTOR VEHICLE HAVING THE DEVICE AND CARRYING OUT THE METHOD - A device for treating exhaust gas containing soot particles, includes at least one ionization element for ionizing soot particles and at least one separation device having a surface precipitator for depositing ionized soot particles. The at least one surface precipitator includes at least two at least partially electrically conductive neutralization regions that are electrically insulated from each other in order to neutralize ionized soot particles. A method for converting soot particles of an exhaust gas includes applying different electric potentials. A motor vehicle includes the device and carries out the method. | 07-26-2012 |
20120186234 | DIESEL PARTICULATE FILTER CONTROL - Methods and systems are provided for managing particulate emissions in an engine including a particulate filter and a CO | 07-26-2012 |
20120186235 | EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE - In order to regenerate an NOx trap catalyst | 07-26-2012 |
20120192547 | DUAL AIR CIRCUIT FOR EXHAUST GAS TREATMENT - An exhaust treatment system for an engine includes a regeneration device being in receipt of exhaust from the engine and positioned upstream of a diesel particulate filter. A compressor provides a source of compressed air. An air/fuel nozzle is coupled to the regeneration device, in receipt of a fuel supply as well as the compressed air. The fuel and compressed air are forced through an orifice of the nozzle to atomize the fuel. A bypass line provides compressed air from the compressor to the regeneration device without passing through the orifice of the nozzle. A valve is operable to allow compressed air to flow through the bypass line when a predetermined condition exists. | 08-02-2012 |
20120192548 | SYSTEM AND METHOD FOR MONITORING REDUCTANT QUALITY - A method of operating an internal combustion engine having a reductant delivery and storage system in an emission control system, comprising of correlating a change in a monitored operating condition with a refill event to determine whether a reductant-diluting substance has been added to the reductant storage system; and limiting vehicle operation based on the correlation. | 08-02-2012 |
20120198820 | SYSTEM AND METHOD FOR ESTIMATING AN AMOUNT OF PARTICULATE MATTER ACCUMULATED IN A PARTICULATE FILTER - An amount of particulate matter accumulated in a particulate filter of an exhaust system is estimated by preloading a memory location with a plurality of hybrid models. Each hybrid model estimates an amount of particulate matter accumulated in the particulate filter between a pair of operating points. An estimated amount of particulate matter accumulated in the particulate filter is stored in the memory location for each hybrid model. Each hybrid model is ranked based on estimation accuracy during operating conditions and the highest ranked hybrid model is selected. The estimated amount of particulate matter accumulated in the particulate filter corresponding to the highest ranked hybrid model is added to the soot estimation value stored in the memory location that corresponds to a ranked hybrid model to provide a soot estimation value of a cumulative estimated amount of particulate matter contained in the particulate filter for the ranked hybrid model. | 08-09-2012 |
20120198821 | DEVICES, SYSTEMS AND METHODS FOR REDUCING AN EMISSION FROM A COMBUSTION REACTION - The invention is directed at systems and process for reducing or eliminating the emissions of one or more undesirable substances. The systems include a heat storage device an emission reduction device, one or more valves, and one or more exit points. | 08-09-2012 |
20120204539 | HYBRID VEHICLE THERMAL MANAGEMENT USING A BYPASS PATH IN A CATALYTIC CONVERTER UNIT - A hybrid vehicle includes an exhaust gas treatment system having a bypass valve for directing a flow of air or exhaust gas through a bypass path or through a primary catalyst. The hybrid vehicle includes an internal combustion engine and an electric motor, each selectively engageable with a transmission to provide a drive torque. The electric motor spins the internal combustion engine when engaged to provide the drive torque, thereby creating a flow of unheated air from the internal combustion engine that flows through the exhaust gas treatment system. The bypass valve directs the flow of air through the bypass path when the engine is spinning and not fueled to prevent cooling of the primary catalyst. The bypass valve directs the flow of exhaust gas through the primary catalyst when the internal combustion engine is spinning and is being fueled, i.e., running, to treat the flow of exhaust gas. | 08-16-2012 |
20120204540 | POWER SYSTEM AND METHOD FOR ENERGIZING AN ELECTRICALLY HEATED CATALYST - A power system and a method for energizing an electrically heated catalyst are provided. The system includes a first battery outputting a first voltage, and a second battery outputting a second voltage. The system further includes a switching device having a first operational state where the first and second batteries are coupled in series to one another, and a second operational state where the first and second batteries are coupled in parallel to one another. The system further includes a generator coupled to the first battery, and when the switching device is in the second operational state the generator supplies a third voltage to the first battery to charge the first and second batteries, and to the electrically heated catalyst such that the catalyst heats exhaust gases upstream of an oxidation catalyst. | 08-16-2012 |
20120204541 | EXHAUST MIXER ELEMENT AND METHOD FOR MIXING - According to one aspect of the invention, a mixer element to be placed between an internal combustion engine exhaust manifold and catalytic converter is provided. The mixer element includes a tubular conduit that receives an exhaust gas flow from the internal combustion engine, a first mixer configured to induce a first vortex of the exhaust gas flow in a first rotational direction and an injector disposed in the tubular conduit downstream of the first mixer, the injector being configured to inject a diesel emission fluid flow into the exhaust gas flow. The mixer element also includes a second mixer positioned downstream of the injector and a third mixer positioned downstream of the second mixer, the third mixer being configured to induce a second vortex of the exhaust gas flow and the diesel emission fluid mixture in a second rotational direction, opposite of the first rotational direction. | 08-16-2012 |
20120204542 | MULTI-LEG EXHAUST AFTERTREATMENT SYSTEM AND METHOD - An exhaust aftertreatment system for treating exhaust flow from an internal combustion engine, and associated method, allows for independent control of exhaust flow through plural exhaust legs of the exhaust aftertreatment system. The independent control of exhaust flow is carried out by adjusting a valve positioned in each the exhaust legs based on a value of a signal generated by a flow measurement device positioned along at least one of the exhaust legs. The valves can be adjusted to force a target flow in a exhaust leg, relative flow among exhaust legs, exhaust temperature in an exhaust leg, exhaust backpressure and/or imbalance within the exhaust legs. | 08-16-2012 |
20120204543 | METHOD FOR REGENERATION OF EXHAUST GAS TREATMENT CATALYST, AND EXHAUST GAS TREATMENT CATAYLST PRODUCED USING THE METHOD - A regenerated exhaust gas treatment catalyst ( | 08-16-2012 |
20120204544 | HYDROCARBON RETAINING AND PURGING SYSTEM - Methods and systems are provided for operating an engine having a hydrocarbon retaining system and an emission control device coupled to an engine exhaust, the engine exhaust comprising a venturi. One example method comprises, during a storing condition, routing exhaust gas through the venturi without generating a venturi action, and then to the hydrocarbon retaining system, while bypassing the emission control device, to store hydrocarbons in the hydrocarbon retaining system, and during a purging condition, routing exhaust gas through the venturi while generating venturi action, then to the emission control device, and then to the hydrocarbon retaining system, to purge stored hydrocarbons, wherein a flow of purged hydrocarbons is drawn back to the venturi via venturi action. | 08-16-2012 |
20120210696 | LOW TEMPERATURE NOx STORAGE SYSTEM FOR LEAN EXHAUST AFTERTREATMENT - Following a cold start of a hydrocarbon-fueled engine operated in a lean-burn-combustion mode, several seconds and minutes may be required for the exhaust gas stream to heat exhaust treatment devices in the exhaust system and conduit to their effective operating temperatures. The warm-up period may be particularly long for a NOx reduction catalyst (SCR) located downstream in the exhaust flow system. Accordingly, a bed of absorbent material, such as a suitably sized bed of alumina particles, located upstream of the SCR, is used to temporarily absorb water and NOx from a relatively cold exhaust until the exhaust has suitably heated the SCR to its operating temperature. Then, the warmed exhaust will remove the water and NOx from their temporary storage material and carry them to the reduction catalyst. | 08-23-2012 |
20120210697 | MULTI-LEG EXHAUST AFTER-TREATMENT SYSTEM AND METHOD - This disclosure provides an exhaust flow detection and variable dosing system and method for treating exhaust flow from an engine. The system includes first and second exhaust flow legs, a cross passage connecting these legs upstream of SCRs and a sensor positioned along the cross passage to detect at least one of differential pressure between the exhaust flow legs, and exhaust flow in the cross passage. A dosing circuit connects a dosing treatment supply to each of the exhaust flow legs at or upstream of the SCRs, and at least one dosing device positioned along the dosing circuit to control the amount of the dosing agent delivered to each exhaust leg. An electronic control unit controls the amount of a dosing agent delivered to the exhaust flow legs independently based on exhaust flows determined for each leg using at least one of the differential pressure and cross passage exhaust flow. | 08-23-2012 |
20120210698 | METHOD AND DEVICE FOR DETERMINING THE CONVERSION CAPACITY OF A CATALYTIC CONVERTER FOR CLEANING EXHAUST GAS - A method for assessing the conversion capacity of a catalytic converter for hydrocarbons when cold starting an internal combustion engine by means of an exhaust probe arranged behind the catalytic converter in the direction of flow, wherein an output signal from the exhaust probe is fed to a control unit. | 08-23-2012 |
20120210699 | METHOD FOR OPERATING A SPARK-IGNITION INTERNAL COMBUSTION ENGINE WITH EXHAUST GAS AFTERTREATMENT - Embodiments for regenerating a particle filter are provided. In one example, a method for operating a spark-ignition internal combustion engine having a particle filter for collecting and burning soot particles in exhaust gas comprises in order to initiate regeneration of the particle filter, increasing a particle filter temperature T | 08-23-2012 |
20120216507 | METHOD FOR DETERMINING SOOT MASS STORED WITH A PARTICULATE FILTER - A method for determining soot mass oxidized during a particulate filter oxidation procedure is disclosed. In one example, soot mass is determined via an Arrhenius equation. The approach may provide cost savings and reliability improvements as compared to other ways of determining soot mass. | 08-30-2012 |
20120216508 | EMISSION CONTROL - Hydrocarbon traps used to trap then release unburned hydrocarbons upon startup of a spark ignition internal combustion engine are sensitive to degradation if exposed to normal temperature exhaust gases. On board diagnostics of HC traps are provided by the invention, by incorporating a heat sensitive oxygen storage material in the HC trap material, and using conventional determination of OSC efficiency to determine if the HC trap material has been exposed to excessive temperature. | 08-30-2012 |
20120216509 | SYSTEM AND METHOD OF DPF PASSIVE ENHANCEMENT THROUGH POWERTRAIN TORQUE-SPEED MANAGEMENT - This disclosure provides a method and system for determining recommendations for vehicle operation that reduce soot production in view of a diesel particulate filter (DPF) of an exhaust aftertreatment system. Recommendations generated can reduce excessive particulate matter (PM) production during transient engine events and provide for operating conditions favorable for passive regeneration. In this way, less frequent active regeneration of the DPF is needed and/or more opportunities are provided for passive regeneration. The system and method can utilize location and terrain information to anticipate and project a window of operation in view of reducing soot production and soot loading of the DPF, or provide the operator with instruction when such opportunities are present or will soon be encountered. | 08-30-2012 |
20120216510 | Vehicle-Based Strategy for Removing Urea Deposits from an SCR Catalyst - A method is provided for controlling regeneration of an SCR catalyst. The method includes coordinating the regeneration duration and temperature (e.g., longer/shorter regenerations and/or lower/higher temperatures) to the urea deposit loading. In this way, improved regeneration may be achieved due to the particular nature of urea deposits on SCR catalysts. | 08-30-2012 |
20120222399 | OXIDATION CATALYST BURN THRESHOLD ADJUSTMENT TO AVOID QUENCHING - A method of controlling an exhaust gas treatment system for an engine includes relating the usage of an oxidation catalyst to a temperature offset value, and increasing a current burn threshold temperature by the temperature offset value to define an adjusted burn threshold temperature. Hydrocarbons may be injected into a flow of exhaust gas when the temperature of the oxidation catalyst is equal to or greater than the adjusted burn threshold temperature. The temperature at which the hydrocarbons are injected into the exhaust gas is thereby increased to accommodate performance degradation in the oxidation catalyst, which extends the life of the oxidation catalyst. | 09-06-2012 |
20120222400 | METHODS AND SYSTEMS FOR EMISSIONS CONTROL IN A DUAL FUEL ENGINE - Various methods and systems are provided for an engine with an exhaust gas treatment system. In one example, under a first condition, a first fuel is delivered for combustion in the engine. Under a second condition, a second fuel is delivered for combustion in the engine, the second fuel different than the first fuel. Under a third condition, the first fuel is delivered as a reductant for the exhaust gas treatment system. | 09-06-2012 |
20120222401 | METHOD FOR OPERATING AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A method for operating an exhaust system of an internal combustion engine, wherein nitrogen oxide (NO | 09-06-2012 |
20120222402 | METHOD FOR DIAGNOSING EXHAUST GAS PROBES AND/OR CATALYTIC CONVERTERS - New operating phases of internal combustion engines, such as coasting in which the internal combustion engine is decoupled from the rest of the drive section, continuously decrease the number of phases in which there is an overrun mode of an internal combustion engine in which diagnoses of catalytic converters and exhaust gas probes are carried out. Also, a method wherein the diagnosis of the at least one exhaust gas probe and/or the at least one catalytic converter carried out during the coasting mode and, in particular, when the cylinder bank is switched off. | 09-06-2012 |
20120222403 | COMBUSTION SYSTEM AND METHOD FOR CLEANING A CATALYTIC CONVERTER INSTALLED IN AN EXHAUST DUCT OF A COMBUSTION SYSTEM - In order to achieve effective cleaning of an inlet side of a catalytic converter in a combustion system, in particular a large-scale internal combustion engine system, a cleaning device having a cleaning brush for mechanically removing deposits is provided on the inlet side. The cleaning brush effectively and reliably removes and swirls up the deposits which have been formed, which are carried away with the exhaust gas in the flow direction through the catalytic converter. | 09-06-2012 |
20120222404 | METHOD FOR CONTROLLING POLLUTANT EMISSIONS FROM A COMBUSTION ENGINE - The invention relates to a method for controlling a system for treating NOx in an exhaust line of an internal combustion engine, said system comprising means for introducing a reducing agent into the exhaust line upstream of an NOx reduction catalyst. The invention is characterised in that it consists in estimating the efficiency of the treatment in relation to a maximum conversion potential obtained if the ratio between the quantity of injected reducer and the quantity of NOx in the gas complies with a given set value and if the mass of reducing agent stored in the catalyst complies with a given storage set value. | 09-06-2012 |
20120227377 | Method for Diagnosing Operation of a Particulate Matter Sensor - A method for diagnosing a particulate matter sensor is described. In one example, a liquid is purposefully injected into the exhaust system to verify operation of the particulate matter sensor. Reliability of particulate matter diagnostics may be improved by way of the approach, at least during some conditions. | 09-13-2012 |
20120227378 | Method For Protecting An Engine During A Parked Regeneration Of A Particulate Filter - An automatic shutdown system is provided in which a work vehicle is shutdown upon an occurrence of a critical fault; i.e., an occurrence of a condition which could diminish the life or cause a complete failure of at least a portion of the work vehicle. | 09-13-2012 |
20120227379 | Filter Cleaning With An Engine Idle Bump - Disclosed is a method of filter regeneration employing an automatic increase in the minimum speed of an engine when a vehicle is in a parked state. The filter regeneration until the operator cancels it or filter regeneration is determined to be complete. | 09-13-2012 |
20120227380 | HYDROCARBON CONVERSION DIAGNOSTIC - A system includes an engine configured to operate in a first operating state and a second operating state, a particulate filter configured to receive exhaust gas from the engine and filter particulate matter from the exhaust gas, and an oxidation catalyst configured to generate heat to increase a temperature of the exhaust gas during a regeneration process. A sensor is configured to measure an actual temperature of the exhaust gas during the regeneration process. A controller is configured to define a fuel conversion factor based, at least in part, on the actual temperature and an expected temperature of the exhaust gas. The controller is further configured to analyze the fuel conversion factor over time relative to at least one of the first and second operating states of the engine and diagnose a fault in the regeneration process based, at least in part, on the fuel conversion factor. | 09-13-2012 |
20120227381 | PARTICULATE FILTER REGENERATION PROCESS DIAGNOSTIC - A system for the treatment of exhaust gases includes an engine, an exhaust system, and a controller. The exhaust aftertreatment system is configured to accept exhaust gas from the engine and includes a particulate filter configured to filter particulate matter from the exhaust gas. A controller is configured to determine an actual temperature of the particulate filter during a regeneration process and analyze the actual temperature relative to a temperature deviation threshold. The controller is configured to adjust the temperature deviation threshold in real time based, at least in part, on an operating condition of the engine and a mass flow of the exhaust gas. | 09-13-2012 |
20120227382 | PARTICULATE FILTER REGENERATION DURING ENGINE SHUTDOWN - Various systems and method are described for controlling an engine having an exhaust system which includes a particulate filter. One example method comprises, after shutting down the engine and spinning down the engine to rest, operating a vacuum pump to draw fresh air through the exhaust system to an intake system, and regenerating at least a portion of the particulate filter during the engine rest. | 09-13-2012 |
20120227383 | METHOD FOR CONTROLLING A SYSTEM FOR THE TREATMENT OF EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for controlling a system for the treatment of exhaust gases in an exhaust line of an internal combustion engine. The method comprises estimating the molar ratio of nitrogen dioxide to nitrogen monoxide at the inlet of an NOx selective reduction catalyst based on cartography that is dependent on the residence time of the exhaust gases in an oxidation catalyst disposed upstream of the gas treatment means leading to a reduction of nitrogen oxides. | 09-13-2012 |
20120233984 | METHOD AND SYSTEM FOR CONTROLLING A NITROGEN OXIDE (NOX) CONVERSION EFFICIENCY MONITOR - A vehicle includes an engine, an exhaust system, a selective catalytic reduction (SCR) device, a first and a second NOx sensor configured to respectively measure an upstream and a downstream NOx level, and a controller or host machine. The controller, via the present method, calculates a NOx conversion efficiency rate of the SCR device using the NOx levels from the sensors. At the end of a key cycle when an accumulated amount of upstream NOx is less than a calibrated upstream NOx level, the controller determines if the NOx conversion efficiency rate is presently passing or failing. The accumulated upstream NOx is recorded in memory for use in calculating the NOx conversion efficiency rate during a subsequent key cycle only when the NOx conversion efficiency rate is presently passing at the end of the key cycle. A control system for the vehicle uses the controller and sensors as noted above. | 09-20-2012 |
20120233985 | APPARATUS COMPRISING LEAN BURN IC ENGINE AND AN EXHAUST SYSTEM THEREFOR - An apparatus comprises: (i) a lean burn internal combustion engine; (ii) an exhaust system for treating a flowing exhaust gas from the engine, which system comprising: (a) a first substrate monolith comprising a NOx adsorber catalyst (NAC); and (b) a catalysed soot filter (CSF) comprising a filter substrate; and (iii) means for enriching the exhaust gas to provide an enriched exhaust gas composition intermittently during normal lean running operation for removing sulfate adsorbed on the NAC, wherein the exhaust system comprises: (c) a compound located downstream of at least some of the NAC, which compound is effective to remove and/or convert at least some hydrogen sulfide in enriched exhaust gas derived from removing sulfate adsorbed on the NAC. | 09-20-2012 |
20120233986 | SYSTEM AND METHOD TO CONTROL SELECTIVE CATALYTIC REDUCTION SYSTEMS IN FEEDBACK - A method includes determining a current mid-bed NH | 09-20-2012 |
20120240552 | METHOD OF OPERATING AN EXHAUST GAS TREATMENT SYSTEM TO PREVENT QUENCHING DURING REGENERATION - A method of controlling an exhaust gas treatment system of a vehicle includes detecting a request to regenerate a particulate filter, and injecting hydrocarbons at an injection rate into a flow of exhaust gas upstream of an oxidation catalyst to heat the oxidation catalyst. The injection rate is increased at a current acceleration rate, and the current acceleration rate is reduced to define a reduced acceleration rate when the oxidation catalyst is quenched. | 09-27-2012 |
20120240553 | METHOD OF DETERMINING IF AN OXIDATION CATALYST IS QUENCHED OR IS NOT QUENCHED - A temperature of exhaust gas downstream of an oxidation catalyst is compared to a temperature of the exhaust gas upstream of the oxidation catalyst to determine if the downstream temperature is increasing over time or decreasing over time as hydrocarbons are injected into the flow of exhaust gas to regenerate a particulate filter. The oxidation catalyst is determined to be quenched when the temperature of the exhaust gas downstream of the oxidation catalyst remains constant or decreases over time as the rate at which the hydrocarbons are injected into the exhaust gas increases. The oxidation catalyst is determined to not be quenched when the temperature of the exhaust gas downstream of the oxidation catalyst increases over time as the rate at which the hydrocarbons are injected into the exhaust gas increases. | 09-27-2012 |
20120240554 | MANGANESE-BASED OXIDES PROMOTED LEAN NOx TRAP (LNT) CATALYST | 09-27-2012 |
20120240555 | METHOD OF INCREASING VOLUMETRIC THROUGHPUT OF AN INTERNAL COMBUSTION ENGINES USED IN VAPOR DESTRUCTION APPLICATIONS - A method and device for controlling emissions of VOC's comprises transporting VOC's to an engine and transporting the exhaust from the engine into a manifold. Supplemental air is transporting into the manifold and heat is transferred from the exhaust to the supplemental air within the manifold. The supplemental air is mixed with the exhaust and the mixture is transferred to a pollution abatement device. | 09-27-2012 |
20120240556 | METHOD TO REDUCE ENGINE EMISSIONS FOR AN ENGINE CAPABLE OF MULTI-STROKE OPERATION AND HAVING A CATALYST - A method to control valves in a cylinder operating in a multi-stroke cylinder mode. Valves are controlled to improve engine emissions as operating conditions vary. | 09-27-2012 |
20120247084 | ELECTRIC PREHEATING OF A CATALYTIC CONVERTOR USING A SOLAR CELL ARRAY - An internal combustion engine vehicle or hybrid-electric vehicle is provided with a vehicle-mounted solar cell array capable of generating electrical power. The solar cell array and other elements, including a metal substrate catalytic convertor form a system for reducing exhaust gas emissions from the vehicle in which the power from the array is applied to minimize exhaust emissions. A primary application of the solar cell array-generated power is to preheat the catalytic convertor to a preferred operating temperature prior to engine start. But the power from the solar cells, directed by a controller, may also be applied to charge the battery or to power electric power receiving devices, for example, to control cabin temperatures. The preferred allocation of the solar power available depends on a number of factors including the state of charge of the batteries, and the time of anticipated next use of the vehicle. | 10-04-2012 |
20120247085 | Compression Ignition Engine System With Diesel Particulate Filter Coated With NOx Reduction Catalyst And Stable Method Of Operation - An engine system includes an electronically controlled compression ignition engine configured to burn diesel fuel to produce an exhaust with a temperature and NOx to soot ratio. An aftertreatment system is fluidly connected to the engine and includes a diesel oxidation catalyst, a reductant supply, and a diesel particulate filter coated with a NOx reduction catalyst but not the diesel oxidation catalyst. A soot load density in the diesel particulate filter is stabilized by oxidizing soot at about a same rate as the compression ignition engine is supplying soot to the aftertreatment system without active regeneration. A NOx reduction reaction is catalyzed by the NOx reduction catalyst on the diesel particulate filter. | 10-04-2012 |
20120247086 | EXHAUST METHANE CONTROL SYSTEMS AND METHODS - A system for a vehicle, includes a conversion temperature determination module and a heating control module. The conversion temperature determination module generates a methane conversion temperature corresponding to a predetermined methane conversion efficiency. The heating control module selectively applies power to a substrate of an electrically heated catalyst (EHC) based on a temperature of the EHC and the methane conversion temperature. The EHC includes at least one catalyst that reacts with methane in exhaust output from an engine. | 10-04-2012 |
20120247087 | Increased Fan Speed To Assist DPF Regeneration - A method and device for raising the temperature of exhaust gas from an engine by increasing parasitic loading on the engine without significantly increasing engine speed. This may be accomplished by increasing a demand on a hydraulic fan powered by a variable displacement hydraulic pump and meeting the demand by adjusting the displacement for the variable displacement hydraulic pump. | 10-04-2012 |
20120247088 | EXHAUST GAS AFTER-TREATMENT SYSTEM - An exhaust gas after-treatment system ( | 10-04-2012 |
20120247089 | INSULATED MAIN NH3 CARTRIDGE SYSTEM WITH SEPARATE START-UP UNIT - A system and method relate to a reductant dosing for use in the reduction of NOx in an exhaust stream is disclosed. The system and method incorporates a separate first or start-up cartridge and an insulated mantel or housing containing at least one to a plurality of main cartridges. The first and main cartridges store an ammonia adsorbing/desorbing material, which releases ammonia gas upon application of sufficient heat. The start-up cartridge permits the initial release of ammonia gas into the exhaust stream even during start-up of an engine, and because it is separate from the main cartridge, the first cartridge cools faster than the main cartridge and can be replenished with ammonia sooner than the main cartridge. The start-up cartridge is housed in or surrounded by a non-insulating debris shield. | 10-04-2012 |
20120255277 | OFFSET AND SLOW RESPONSE DIAGNOSTIC METHODS FOR NOx SENSORS IN VEHICLE EXHAUST TREATMENT APPLICATIONS - A method that includes in-vehicle systems and practices for determining whether a NOx sensor in an exhaust stream is performing properly. | 10-11-2012 |
20120255278 | RECONFIGURABLE BI-METALLIC MIXER FOR AN EXHAUST AFTERTREATMENT SYSTEM AND METHOD OF USING THE SAME - A mixer for an exhaust aftertreatment system is disclosed. The mixer includes a body portion that is configured to be disposed in an exhaust conduit of an exhaust aftertreatment system upstream of an exhaust aftertreatment device. The mixer also includes an airfoil portion that is disposed on the body portion and reversibly movable between a deployed position and a retracted position, wherein in the deployed position the airfoil portion provides a deployed resistance to an exhaust gas flow and in the retracted position provides a retracted resistance thereto, and the deployed resistance is greater than the retracted resistance, the body portion and airfoil portion comprising a mixer. The mixer further includes a bimetallic couple that is operatively joined to the mixer and configured to reversibly move the airfoil portion from the retracted position to the deployed position. | 10-11-2012 |
20120255279 | SYSTEM AND METHOD FOR SOLAR-POWERED CONTROL OF EXHAUST AFTER-TREATMENT SYSTEMS - A system and method for providing energy to auto systems such as systems after-treating exhaust. Energy may be received from a solar energy source electrically connected to an after-treatment system. At least some of the energy from the solar energy source may be provided to the after-treatment system to purify exhaust from an engine. A control module may provide at least some of the energy from the solar energy source to a heater, for example, to initiate heating the after-treatment system prior to starting the engine. The heater may heat the after-treatment to temperatures within a predetermined temperature range associated with optimal efficiency for the after-treatment system. | 10-11-2012 |
20120255280 | METHOD FOR MONITORING A CATALYTIC CONVERTER - A method for monitoring the capability of a catalytic converter to convert nitrogen monoxide into nitrogen dioxide in the exhaust gas of an internal combustion engine, the catalytic converter being arranged in an exhaust gas duct of the internal combustion engine and the catalytic converter being followed downstream by a collecting particle sensor. It is in this case provided that, in a monitoring cycle, a decrease in the particle loading of the particle sensor during the operation of the internal combustion engine under predetermined operating conditions is taken to conclude an adequate capability of the catalytic converter to convert from nitrogen monoxide to nitrogen dioxide. | 10-11-2012 |
20120255281 | Method for Adjusting Engine Air-Fuel Ratio - A method for adjusting an air-fuel ratio of an engine is disclosed. In one example, the engine air-fuel ratio is adjusted in response to a duty cycle and frequency of a post catalyst oxygen sensor. The method may improve catalyst efficiency. | 10-11-2012 |
20120255282 | CONTROL DEVICE AND CONTROL METHOD FOR REDUCTION AGENT INJECTION VALVE - A controller and method of a reducing agent injector capable of accurately providing a required amount of ammonia to a reduction catalyst. | 10-11-2012 |
20120255283 | EXHAUST SYSTEM COMPRISING EXOTHERM-GENERATING CATALYST - An apparatus comprising a compression ignition engine and an exhaust system therefor comprising at least one exhaust system component for treating exhaust gas and means for generating an exotherm for heating the at least one exhaust system component, which exotherm generating means consisting essentially of a catalyst and means for injecting hydrocarbon into exhaust gas for combustion on the catalyst, which catalyst consisting essentially of both a palladium (Pd) component and a platinum (Pt) component, and an optional support material, disposed on a substrate monolith. | 10-11-2012 |
20120260627 | INTERNAL COMBUSTION ENGINE WITH EMISSION TREATMENT INTERPOSED BETWEEN TWO EXPANSION PHASES - An internal combustion engine has a first work extraction station for extracting work from combustion and expansion of working gases. An emission treatment station treats the working gases after leaving the first extraction work station for reducing emissions. A second work extraction station receives the working gases from the emission treatment station for a second extraction of work from the working gases. | 10-18-2012 |
20120260628 | TREATMENT OF COLD START ENGINE EXHAUST - A method of treating a cold-start engine exhaust gas stream comprising hydrocarbons and other pollutants, the method comprising: flowing the exhaust gas stream over a molecular sieve bed, the molecular sieve bed comprising an alkali metal cation-exchanged molecular sieve having intersecting 10- and 12-membered ring pore channels, to provide a first exhaust stream; flowing the first exhaust gas stream over a catalyst to convert any residual hydrocarbons and other pollutants contained in the first exhaust gas stream to innocuous products to provide a treated exhaust stream; and discharging the treated exhaust stream into the atmosphere. | 10-18-2012 |
20120260629 | System and Method for Liquid Reductant Injection - A method for operating a liquid reductant injection system is provided. The method includes storing a reductant mixture of ethanol, water, and urea; drawing the stored mixture into an electrically heated pick-up tube for delivery via a delivery line to the exhaust by operating a pump in a first direction; and, clearing a return line that returns the stored mixture or the delivery line by operating the pump in a second, reverse, direction. In this way, by including ethanol in the reductant solution, a freezing point temperature of the liquid reductant may be reduced. | 10-18-2012 |
20120260630 | COMBINED ENGINE OUT NOX MANAGEMENT - An apparatus for controlling engine operations to a low NOx output amount at low selective catalytic reduction (SCR) temperature values and alternatively for controlling engine operations in an EGR cooler bypass regime at low engine load levels is described. The apparatus includes a controller that interprets a present speed and a present load of an engine, that determines an engine operating region in response to the present speed and the present load, and that provides an EGR cooler bypass command that provides EGR cooler bypass flow in response to the engine operating region being a first, low load, region. The controller operates the engine with supplemental NO | 10-18-2012 |
20120260631 | Method and device for regenerating a particle filter in a y-exhaust gas system - A method and device for regenerating an exhaust gas aftertreatment component for filtering soot particles in an engine having a first cylinder group, exhaust gases being guided through an exhaust gas channel and whose fuel/air mixture ratio is set via a fuel metering system, activated via a control unit, by a control loop for setting a lambda value using a signal of a first exhaust gas sensor, in the exhaust gas flow direction upstream from a catalytic converter, having at least another cylinder group, exhaust gases being guided through another exhaust gas channel and whose fuel/air mixture ratio is set via another fuel metering system by another control loop for setting another lambda value based on the signal of another exhaust gas sensor, in the exhaust gas flow direction upstream from a catalytic converter, the separate channels joined together downstream to form a shared channel, having a shared catalytic converter. | 10-18-2012 |
20120260632 | METHOD FOR OPERATING A DELIVERY DEVICE FOR A REDUCING AGENT AND MOTOR VEHICLE HAVING A DELIVERY DEVICE - A method for operating a reducing agent delivery device having a liquid reducing agent tank, an injector dispensing reducing agent into an exhaust treatment device, an internal combustion engine and a reducing agent line from tank to injector, includes conveying the reducing agent from tank to injector with a pump and providing a pressure sensor in the line. The method includes, repeatedly: determining and providing supply pressure for the injector in the delivery device with the pump, calculating an injector opening time from a determined injection volume and supply pressure and opening the injector at the calculated injector opening time. A venting procedure at a point in time includes: determining an increase of a pressure conveying volume characteristic in the delivery device, calculating an air bubble volume by comparing the increase to a target increase, and conveying a conveying volume through the injector. A motor vehicle is also provided. | 10-18-2012 |
20120260633 | AFTERTREATMENT SYSTEM AND CONTROL STRATEGY FOR INTERNAL COMBUSTION ENGINE - In an exhaust gas treatment device in which a diesel oxidation catalyst and a DPF are provided in an exhaust pipe of an internal combustion engine, abnormal combustion in the DPF, occurring when the internal combustion engine varies from a high load condition to a low load condition, poses a problem. To solve this problem, in the present invention, a DPF abnormal combustion causing operation is determined to have occurred when the internal combustion engine shifts from a high rotation or high load operation region α to a low rotation, low load operation region β within a set time T | 10-18-2012 |
20120260634 | NOx CONTROL SYSTEMS AND METHODS FOR CONTROLLING NOx EMISSIONS - An exhaust aftertreatment system comprising a selective reduction catalyst, a NO | 10-18-2012 |
20120260635 | TREATMENT OF DIESEL ENGINE EXHAUST - A diesel exhaust treatment system for treating exhaust gas from a diesel engine comprises at least one diesel particulate filter, at least one diesel exhaust fluid mixing chamber and at least one selective catalytic reduction converter (SCR). In one desirable embodiment, plural diesel particulate filters are arranged in parallel and plural SCRs are arranged in parallel. These components including the diesel exhaust fluid mixing chamber can be included in a common housing with the exhaust flow reversing directions a plurality of times as it passes through the treatment system from an exhaust inlet to an exhaust outlet. The housing can be coupled to one vehicle frame rail with most of the housing and components contained therein positioned outside the outer surface of the one frame rail. | 10-18-2012 |
20120266584 | EXHAUST TREATMENT SYSTEM - An exhaust treatment system for a power system is disclosed. The exhaust treatment system includes an exhaust conduit directing exhaust gas produced by the power system towards at least one exhaust treatment device. The exhaust treatment system may also include a substrate positioned within an enclosure of the at least one exhaust treatment device. The exhaust conduit may be configured to preheat the substrate with the exhaust gas prior to directing the exhaust gas into the enclosure. | 10-25-2012 |
20120272638 | REGENERATION METHODS AND SYSTEMS FOR PARTICULATE FILTERS - A method of regenerating a particulate filter of an exhaust system is provided. The method includes determining a first regeneration mode based on a soot level; generating control signals to a first fuel injector associated with an engine based on the first regeneration mode; determining a second regeneration mode based on the soot level; and generating control signal to a second fuel injector associated with an exhaust stream of the exhaust system based on the second regeneration mode. | 11-01-2012 |
20120272639 | Reductant Quality Sensor - A control system for reducing nitrogen oxides in engine exhaust includes an emissions catalyst having an inlet adapted to receive an exhaust from the engine. A reductant tank is configured to store a reductant. An injector is in fluid communication with the reductant tank and is operable to inject the reductant into the exhaust upstream of the catalyst. A sensor is in fluid communication with the reductant and outputs a reductant quality signal based on the reductant. A controller determines a reductant quality of the reductant based on the reductant quality signal and outputs a dosing rate signal based on the reductant quality. The injector alters a dosing rate of the reductant based on the dosing signal. | 11-01-2012 |
20120272640 | VARIABLE SUCTION EXHAUST - A throttleable exhaust venturi is described herein that generates strong suction pressures at an exhaust outlet by accelerating an incoming ambient fluid stream with the aid of a venturi to high gas velocities and injecting a combustion exhaust stream into the ambient fluid stream at an effective venturi throat. A mixing element downstream of the venturi throat ensures that the mixed fluid stream recovers from a negative static pressure up to local atmospheric pressure. A physical and the effective throat of the venturi are designed to promote mixing and stabilize the ambient fluid flow to ensure that high velocity is achieved and the effective venturi is operable over a variety of combustion exhaust stream mass flow rates. | 11-01-2012 |
20120279201 | DEVICE, METHOD, AND SYSTEM FOR EMISSIONS CONTROL - Various embodiments for an exhaust gas treatment device are provided. In one example, the exhaust gas treatment device includes a first substrate coated with a low temperature catalyst configured to operate under a first, low temperature range. The exhaust gas treatment device further includes a second substrate coated with a high temperature catalyst positioned downstream of the first substrate, the high temperature catalyst configured to operate under a second, high temperature range. Further, in the first and second temperature ranges, particulate matter is oxidized at the second substrate. | 11-08-2012 |
20120279202 | METHOD FOR EXHAUST GAS-RECIRCULATION - A method for exhaust gas recirculation (EGR), in particular in internal combustion engines, in particular for reducing NOx emission, by actuating an EGR valve ( | 11-08-2012 |
20120285139 | EMISSIONS CONTROL DIAGNOSTIC METHOD AND SYSTEM - Various methods for and embodiments of an aftertreatment system which includes a catalyst disposed upstream of a particulate filter are provided. In one example, the method includes, conducting soot regeneration of the particulate filter under a selected operating condition, and determining whether a soot regeneration frequency of the particulate filter is greater than a threshold frequency. The method further includes initiating a sulfur regeneration of the aftertreatment system based on the soot regeneration frequency of the particulate filter being greater than the threshold frequency, determining whether the soot regeneration frequency of the particulate filter is less than the threshold frequency after the sulfur regeneration, and conducting non-regeneration operation of the aftertreatment system based on the soot regeneration frequency of the particulate filter being less than the threshold frequency after the sulfur regeneration of the aftertreatment system. | 11-15-2012 |
20120285140 | METHOD FOR MONITORING HYDROCARBON SLIP FROM AN OXIDATION CATALYST - A method for operating a compression-ignition internal combustion engine including an exhaust aftertreatment system having an oxidation catalyst fluidly coupled upstream of a catalyzed particulate filter includes introducing fuel into an exhaust gas feedstream of the engine upstream of the oxidation catalyst, determining operating parameters associated with the exhaust gas feedstream, determining a hydrocarbon slip rate through the oxidation catalyst corresponding to the operating parameters associated with the exhaust gas feedstream and the introduced fuel into the exhaust gas feedstream, and controlling a flowrate of fuel introduced into the exhaust gas feedstream upstream of the oxidation catalyst in response to the estimated hydrocarbon slip rate through the oxidation catalyst. | 11-15-2012 |
20120285141 | PARTICULATE FILTER REGENERATION METHOD - A regeneration system for a filter that filters exhaust gas of an engine includes a soot loading determination module that determines soot accumulation in the filter. A regeneration control module receives the determined soot accumulation from the soot loading determination module, compares the soot accumulation to a first soot accumulation threshold, and selectively increases oxidation levels in the exhaust gas in response to the comparison between the soot accumulation and the first soot accumulation threshold to initiate regeneration in the filter. | 11-15-2012 |
20120285142 | SYSTEM AND METHOD FOR CONTROLLING FUEL DELIVERY BASED ON OUTPUT FROM A POST-CATALYST OXYGEN SENSOR DURING CATALYST LIGHT-OFF - A system includes a voltage determination module and a fuel control module. The voltage determination module determines a first output voltage of a first oxygen sensor position upstream from a catalyst in an exhaust system of an engine, and determines a second output voltage from a second oxygen sensor positioned downstream from the catalyst, the first output voltage indicating a first oxygen level of exhaust upstream from the catalyst, the second output voltage indicating a second oxygen level of exhaust downstream from the catalyst. The fuel control module controls a fuel mass injected into the engine based on the first output voltage and the second output voltage when a temperature of the catalyst is greater than a light-off temperature, and controls the fuel mass based on the second output voltage and independent from the first output voltage when the catalyst temperature is less than light-off temperature. | 11-15-2012 |
20120285143 | METHOD FOR MANAGING AMMONIA SLIP - An internal combustion engine is configured to operate in a compression-ignition combustion mode and includes an exhaust aftertreatment system having an ammonia-selective catalytic reduction device. A method for operating the engine includes determining a present engine NOx generation rate, determining a NOx reduction rate of the ammonia-selective catalytic reduction device, determining an ammonia slip rate from the ammonia-selective catalytic reduction device corresponding to the NOx reduction rate of the ammonia-selective catalytic reduction device and the present engine NOx generation rate, and controlling engine operation to adjust the present engine NOx generation rate in response to the ammonia slip rate from the ammonia-selective catalytic reduction device. | 11-15-2012 |
20120285144 | EXHAUST AFTER TREATMENT SYSTEM AND METHOD FOR TREATING EXHAUST - In one exemplary embodiment of the invention an exhaust after treatment system is provided that includes an inlet housing, an inlet in the inlet housing configured to receive an exhaust gas flow from an internal combustion engine and an outlet in the inlet housing configured to direct the exhaust gas flow to a pollutant reduction device. The system also includes a deflector coupled to an inner surface of the inlet housing, the deflector configured to receive the exhaust gas flow from the inlet and uniformly direct the exhaust flow through the outlet and to the pollutant reduction device. | 11-15-2012 |
20120285145 | METHOD AND DEVICE FOR ESTIMATING NOX EMISSIONS IN COMBUSTION ENGINES - The present invention provides for a system for controlling NOx emissions based on the calculation of an error given by the difference between a first measured value obtained from a NOx sensor ( | 11-15-2012 |
20120291419 | Methods And System For Ash Detection In Exhaust Particulate Filter - A method of detecting ash in an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy through an exhaust particulate filter containing soot and ash, and sensing a strength of the transmitted electromagnetic energy after having been attenuated in response to the soot. The method further includes electronically storing a filter monitoring history responsive to a difference between the transmitted strength and the sensed strength of the electromagnetic energy, and detecting an amount of the ash based at least in part upon a pattern of electromagnetic energy attenuation defined by the stored filter monitoring history. An exhaust particulate filter system for implementing related methodology includes a microprocessor configured to determine a value indicative of an amount of ash contained within an exhaust particulate filter responsive to a pattern of electromagnetic energy attenuation defined by a stored filter monitoring history. | 11-22-2012 |
20120291420 | OXIDATION CATALYSTS FOR ENGINES PRODUCING LOW TEMPERATURE EXHAUST STREAMS - The oxidation of carbon monoxide (CO) and hydrocarbons (HC) in an oxygen-containing gas stream, such as the exhaust stream from a diesel engine, or other lean-burn engine, may be catalyzed using a combination of mixed oxide particles of cerium, zirconium and copper, and discrete particles of an alumina-supported platinum group metal catalyst. The catalyzed oxidation of CO and HC by this combination of oxidation catalyst particles is effective at temperatures below 300° C. | 11-22-2012 |
20120291421 | EXHAUST TREATMENT METHODS AND SYSTEMS - A control method for an exhaust treatment system is provided. The method includes: selectively determining a fluid state from a plurality of fluid states based on a temperature of a fluid supply source; estimating an average consumption rate based on the fluid state; and evaluating a fluid supply within the fluid supply source based on the average consumption rate. | 11-22-2012 |
20120291422 | PARTICULATE FILTER AND ASSOCIATED METHODS FOR EXHAUST PURIFICATION - A particulate filter for a vehicle exhaust system includes a primary filter surrounded by a secondary filter and a quenching agent injection nozzle arranged upstream of the primary filter. In a normal mode, exhaust flows through the primary filter, and in a fail-safe mode or a mixed mode, at least some exhaust flows through the secondary filter and quenching agent is injected via the nozzle to cool the primary filter. The fail-safe or mixed modes may be enacted during an overload of the primary filter, for example. If engine shutdown is initiated during regeneration of the primary filter, a rate of quenching agent injection may be adjusted so that the regeneration may be completed at a safe temperature. | 11-22-2012 |
20120297750 | METHOD FOR MONITORING AN EXHAUST PARTICULATE FILTER - An exhaust aftertreatment system having a particulate filter is monitored by monitoring a particulate filter regeneration event and detecting an associated regeneration period. The particulate filter regeneration period is compared to a preferred event window. A fault is detected when the monitored particulate filter regeneration period extends beyond the preferred event window. | 11-29-2012 |
20120297751 | METHOD FOR DETERMINING LOAD OF A PARTICULATE FILTER - A particulate filter is monitored for a particulate matter load when fluidly coupled to an internal combustion engine. Monitoring of the particulate filter is achieved by determining a rate of production of particulate matter from the internal combustion engine, a rate of capture of the particulate matter within the particulate filter, a regeneration rate for the particulate filter, and an amount of particulate matter collected in the particulate filter. | 11-29-2012 |
20120297752 | Engine System With Exhaust-Cooled Fuel Processor - An engine system comprises a fuel processor that is supplied with air and a fuel stream to produce a hydrogen-containing gas stream. The fuel processor comprises a housing, and at least a portion of the housing is located within an exhaust stream conduit from the engine. During operation of the engine, heat transfer between the fuel processor and the engine exhaust stream occurs. An exhaust after-treatment assembly is located downstream of the fuel processor and is connected to selectively receive hydrogen-containing gas stream from the fuel processor. | 11-29-2012 |
20120304622 | METHOD OF USING A REGENERATIVE BRAKE SYSTEM FOR HEATING A MOTOR VEHICLE CATALYTIC CONVERTER AND POWERING OTHER ELECTRICAL ACCESSORIES - A method for a motor vehicle includes using a regenerative brake system that produces electric current as a result of application of said regenerative brakes and sending at least a fraction of the electric current directly to an electrical accessory of the vehicle and bypassing the battery. One electrical accessory may be an electrically heated catalytic converter. | 12-06-2012 |
20120304623 | EXHAUST GAS AFTERTREATMENT DEVICE AND METHOD FOR A GASOLINE ENGINE - Embodiments for an exhaust gas aftertreatment device are provided. In one example, an exhaust gas aftertreatment device for a gasoline engine comprises a filter body with porous filter walls through which exhaust gas flows to remove soot, the porous filter walls containing a first catalyst material and having a coating of a second catalyst material on partial areas of the filter walls. In this way, a particulate filter and catalyst may be provided in a common aftertreatment device. | 12-06-2012 |
20120304624 | NON-STOICHIOMETRIC PEROVSKITE OXIDE OXIDATION CATALYST FOR OXIDIZING NO TO NO2 - A non-stoichiometric perovskite oxide having the general chemical formula La | 12-06-2012 |
20120311994 | PARTICULATE FILTER MONITORING METHODS AND SYSTEMS - A method of monitoring regeneration of a particulate filter is provided. The method includes evaluating whether a regeneration event is based on a fixed threshold condition; selectively setting a pass or fail status based on the evaluating; and generating a message indicating the pass or fail status. | 12-13-2012 |
20120311995 | NOx ADSORBER CATALYST CONDITION EVALUATION APPARATUS AND ASSOCIATED METHODS - According to one embodiment, an apparatus for evaluating the condition of a NOx adsorber catalyst (NAC) of an internal combustion engine system includes a rich condition timing module, NAC outlet lambda module, and NAC condition module. The rich condition timing module is configured to accumulate the total time during which exhaust gas exiting the NAC has a lambda value less than 1.0. The NAC outlet lambda module is configured to store NAC outlet lambda values of the exhaust gas while the exhaust gas exiting the NAC has a lambda value less than 1.0. The NAC condition module is configured to evaluate the condition of the NAC based on the total time during which exhaust gas exiting the NAC has a lambda value less than 1.0 and an accumulation of the stored NAC outlet lambda values. | 12-13-2012 |
20120311996 | FILTERING METHOD AND FILTER FOR A NOX SENSOR OF AN EXHAUST GAS SYSTEM - Embodiments for determining NH | 12-13-2012 |
20120311997 | NOX REMOVAL SYSTEM FOR BIOGAS ENGINES AT ANAEROBIC DIGESTION FACILITIES - Provided herein are methods, devices and systems comprising a reactor that is operatively connected to: (a) a biogas production unit for converting waste to a biogas stream; and (b) an engine that utilizes the biogas stream from the biogas producing unit to produce energy and an engine exhaust. | 12-13-2012 |
20120317959 | DIAGNOSTIC SYSTEM AND METHOD FOR AN OXYGEN SENSOR POSITIONED DOWNSTREAM FROM A CATALYTIC CONVERTER - A system according to the principles of the present disclosure includes a diagnostic execution module and a diagnostic disabling module. The diagnostic execution module diagnoses a fault in at least one of an oxygen sensor and a catalytic converter based on input received from the oxygen sensor. The diagnostic disabling module disables the diagnosing based on at least one of a temperature of the catalytic converter and a mass flow rate of air flowing through the catalytic converter. | 12-20-2012 |
20120324864 | SYSTEM AND METHODS FOR CONTROLLING AIR FUEL RATIO - Methods and system for controlling air-fuel ratios in an internal combustion engine are disclosed. One embodiment comprises, adjusting a sensor calibration correction value of an exhaust sensor upstream of a catalyst based on an exhaust sensor downstream of the catalyst. The adjustment of the sensor calibration correction value takes advantage of the fact that certain aromatic hydrocarbons causing errors in the reading of the upstream sensor are not present at the downstream sensor due to sufficient catalytic activity of a catalyst positioned between the sensors. | 12-27-2012 |
20120324865 | METHOD FOR REGULATING A PUMP OF AN SCR SYSTEM - A method for regulating a motor-driven pump of an SCR system, the pump delivering a pressure, being subjected to a hydraulic torque in relation to this pressure and also to a resistive torque and being driven by an electric motor including coils supplied with a current and developing a torque in relation to this current, according to which to regulate the pump, use is made of a mechanism to measure the current in the coils of the motor, of a regulator of overall current consumed by the motor, and of a model of the relation between the current and the pressure using an estimate of part of the resistive torque, namely the dry frictions, obtained by rotating the pump under no-load conditions at different speeds and by measuring the associated current. | 12-27-2012 |
20120324866 | METHOD FOR OPERATING A DELIVERY DEVICE FOR A REDUCING AGENT AND DELIVERY DEVICE FOR A REDUCING AGENT - A method for operating a delivery device for delivering a reducing agent from a reducing agent tank into an exhaust treatment device of an internal combustion engine of a motor vehicle, includes at least intermittently carrying out a ventilation process of the delivery device during operation of the internal combustion engine. A registration of a ventilation process first occurs. A timing unit having a preset time interval and/or a mass-flow summing unit having a preset total mass flow is then actuated. When the preset time interval and/or the preset total mass flow is reached, the ventilation process is then carried out. In particular, monitoring the delivery device by a pressure sensor can thus be omitted. A delivery device for delivering a reducing agent is also provided. | 12-27-2012 |
20120324867 | CONTROL OF EMISSIONS - A diesel engine aftertreatment system comprises a diesel engine having an exhaust manifold and a filter substrate in direct connection with the exhaust manifold without any intervening catalyst, wherein the filter substrate comprises on its inlet side an SCR catalyst incorporating a non-coking molecular sieve. | 12-27-2012 |
20120324868 | METHOD FOR CONVERTING CONSTITUENT GASES IN AN INTERNAL COMBUSTION ENGINE EXHAUST GAS MIXTURE AND A VEHICLE INCORPORATING THE SAME - A vehicle includes an internal combustion engine operatively disposed therein. The engine generates exhaust gases. The vehicle further includes an alternator operatively connected to the engine. The alternator produces DC power. An ultracapacitor is operatively connected to the alternator to receive electrical energy therefrom. The vehicle still further includes an exhaust gas treatment system operatively connected to the engine to receive exhaust gases therefrom. The exhaust gas treatment system includes an electrically heated catalyst (EHC) device electrically connected to the ultracapacitor to selectively heat a catalytic exhaust system component. The ultracapacitor stores energy converted by the alternator from vehicle kinetic energy and releases the stored energy to heat the EHC. | 12-27-2012 |
20130000274 | Regeneration Control System For Exhaust Filter And Method - A regeneration control system for an exhaust filter in an internal combustion engine system includes a first sensing mechanism for monitoring an exhaust flow resistance of the exhaust filter, and a second sensing mechanism for monitoring an attenuation of electromagnetic energy transmitted through the exhaust filter. The regeneration control system further includes an electronic controller coupled with the sensing mechanisms and configured to output a filter regeneration command responsive to an amount of particulate matter trapped within the exhaust filter. The electronic controller is further configured to weight data from the first and second sensing mechanisms in determining the amount of particulate matter. Weighting of the data may be responsive to an operating state of the internal combustion engine system. Related methodology is also disclosed. | 01-03-2013 |
20130000275 | ENGINE SYSTEMS AND METHODS OF OPERATING AN ENGINE - One embodiment of the present invention is a unique method for operating an engine. Another embodiment is a unique engine system. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for engines and engine systems. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith. | 01-03-2013 |
20130000276 | VIRTUAL REDUCTANT QUALITY SENSOR - An exhaust treatment system is provided. The exhaust treatment system may include a selective catalyst reduction (SCR) unit for removing NO | 01-03-2013 |
20130000277 | SYSTEM FOR REDUCING ENGINE EMISSIONS AND BACKPRESSURE USING PARALLEL EMISSION REDUCTION EQUIPMENT - An exhaust emission reduction system for a fuel injected engine system has a plurality of emission reduction components configured to process the exhaust gas. The emissions reduction components include of one or more NO | 01-03-2013 |
20130000278 | METHOD FOR MINIMIZING AMMONIA SLIP FROM SCR CATALYSTS - Embodiments for reducing ammonia slip are provided. In one example, a method for reduction of ammonia emissions from an engine exhaust gas aftertreatment device with an SCR catalyst comprises determining a concentration of NOx and/or ammonia in the exhaust gas aftertreatment device, comparing a determined value of NOx and/or ammonia concentration with a nominal value for ammonia and NOx, respectively, and if an actual or shortly forecasted ammonia concentration is above the respective nominal value, triggering engine conditions with higher exhaust NOx concentration. In this way, ammonia slip may be reduced without degrading fuel economy. | 01-03-2013 |
20130000279 | METHOD AND DEVICE FOR PREVENTING FUEL FREEZING IN A POSTPROCESSING BURNER SYSTEM - Disclosed is a method for preventing fuel freezing in a postprocessing burner system with a burner | 01-03-2013 |
20130008148 | EXHAUST PURIFYING SYSTEM FOR HYBRID VEHICLE AND CONTROL METHOD THEREFOR - An exhaust purifying system for a hybrid vehicle includes: a catalytic device ( | 01-10-2013 |
20130008149 | ESTIMATION OF EFFICIENCY FOR AGED CATALYSTS - Systems and methods for estimating an efficiency of a catalyst placed in an exhaust path of a combustion engine are disclosed. In one example approach, a method comprises: ageing the catalyst consecutively at different temperatures for definite time periods; measuring the catalyst conversion efficiency after each ageing step; calculating the ageing factor for each step of the ageing procedure and the accumulative value of the ageing factors for all steps of the ageing procedure; estimating catalyst efficiency correlation factors related to the measured catalyst conversion efficiency for each temperature point and for all ageing conditions; determining a correlation between the catalyst efficiency correlation factors and the accumulative value of the ageing factors; and calculating the conversion efficiency of the aged catalyst based on a predetermined correlation between the accumulative ageing factor and the catalyst efficiency correlation factor. | 01-10-2013 |
20130008150 | COMBUSTION/TEMPERATURE INCREASE CONTROL METHOD AND DEVICE FOR AFTER-TREATMENT BURNER SYSTEM - Disclosed is a combustion/temperature increase control method for an after-treatment burner system with a burner | 01-10-2013 |
20130014492 | EMISSION CONTROL SYSTEM FOR A VEHICLEAANM BASISTA; JEFFREY S.AACI MILFORDAAST MIAACO USAAGP BASISTA; JEFFREY S. MILFORD MI USAANM YACCARINO; PHILIP A.AACI TROYAAST MIAACO USAAGP YACCARINO; PHILIP A. TROY MI US - In accordance with an exemplary embodiment, an emission control system and method is provided for a vehicle. The system comprises a reductant reservoir having an intake pipe for receiving reductant and a heater for heating the reductant. A pump provides the heated reductant to an injector and also to a conduit extending into the intake pipe to provide heated reductant into the intake pipe to melt any frozen reductant in the intake pipe. The method comprises heating reductant stored within a reservoir of a vehicle emission control system, and pumping the heated inductant into an intake pipe of the reservoir to melt any frozen reductant in the intake pipe. | 01-17-2013 |
20130014493 | SYSTEM FOR PURIFYING EXHAUST GAS AND METHOD FOR CONTROLLING THE SAMEAANM Park; Jae BeomAACI SeoulAACO KRAAGP Park; Jae Beom Seoul KR - A system for purifying an exhaust gas may include a lean NOx trap (LNT) catalyst adapted to absorb nitrogen oxides contained in the exhaust gas at a lean atmosphere, release the absorbed nitrogen oxides at a rich atmosphere, and reduce or slip the released nitrogen oxides according to a temperature thereof; a particulate filter adapted to trap particulate matters contained in the exhaust gas and regenerate the trapped particulate matters by using the nitrogen oxides slipped from the LNT catalyst; and a controller adapted to selectively create the rich atmosphere when the temperature of the LNT catalyst is higher than or equal to a first predetermined temperature or a temperature of the particulate filter is higher than or equal to a second predetermined temperature. A method for controlling the system is also disclosed. | 01-17-2013 |
20130019588 | Method Of Controlling A Direct-Injection Gaseous-Fuelled Internal Combustion Engine System With A Selective Catalytic Reduction Converter - A method controls a direct-injection gaseous-fuelled internal combustion engine system to improve the conversion efficiency of an SCR converter that is operative to reduce levels of NOx. The method comprises detecting when the internal combustion engine is idling and timing the injection of a first quantity of fuel to begin injection when the engine's piston is near top dead center; and controlling the temperature of exhaust gas to be above a predetermined temperature that is defined by an operating temperature range that achieves a desired conversion efficiency for the selective catalytic reduction converter, by: (a) timing injection of the gaseous fuel to begin after timing for injection the first quantity of fuel, and (b) increasing exhaust gas temperature by increasing a delay in timing for injecting the gaseous fuel, while limiting the delay to keep concentration of unburned fuel exiting the combustion chamber below a predetermined concentration. | 01-24-2013 |
20130025261 | SYSTEM AND METHOD FOR CONTROLLING AMMONIA LEVELS IN A SELECTIVE CATALYTIC REDUCTION CATALYST USING A NITROGEN OXIDE SENSOR - A system according to the principles of the present disclosure includes an air/fuel ratio determination module and an emission level determination module. The air/fuel ratio determination module determines an air/fuel ratio based on input from an air/fuel ratio sensor positioned downstream from a three-way catalyst that is positioned upstream from a selective catalytic reduction (SCR) catalyst. The emission level determination module selects one of a predetermined value and an input based on the air/fuel ratio. The input is received from a nitrogen oxide sensor positioned downstream from the three-way catalyst. The emission level determination module determines an ammonia level based on the one of the predetermined value and the input received from the nitrogen oxide sensor. | 01-31-2013 |
20130031889 | METHOD OF TREATING EMISSIONS OF A HYBRID VEHICLE WITH A HYDROCARBON ABSORBER AND A CATALYST BYPASS SYSTEM - A method of treating emissions from an internal combustion engine of a hybrid vehicle includes directing a flow of air created by the internal combustion engine when the internal combustion engine is spinning but not being fueled through a hydrocarbon absorber to collect hydrocarbons within the flow of air. When the hydrocarbon absorber is full and unable to collect additional hydrocarbons, the flow of air is directed through an electrically heated catalyst to treat the flow of air and remove the hydrocarbons. When the hydrocarbon absorber is not full and able to collect additional hydrocarbons, the flow of air is directed through a bypass path that bypasses the electrically heated catalyst to conserve the thermal energy stored within the electrically heated catalyst. | 02-07-2013 |
20130031890 | Reductant Injection Control System - A control system for reducing nitrogen oxides in an engine exhaust of an engine includes an emissions catalyst having an inlet adapted to receive an exhaust from the engine. A reductant tank stores a reductant. An injector is in fluid communication with the reductant tank and is operable to inject the reductant into the exhaust upstream of the catalyst. A reductant pump pumps the reductant from the reductant tank to the injector. A controller determines a target pressure of the reductant based on an engine operating condition and operates the reductant pump based on the target pressure. | 02-07-2013 |
20130031891 | NH3 EMISSIONS MANAGEMENT IN A NOX REDUCTION SYSTEM - A system includes an internal combustion engine producing an exhaust gas, an aftertreatment system receiving the exhaust gas, the aftertreatment system including a particulate filter positioned upstream of an SCR catalyst component, and a urea injector operatively coupled to the aftertreatment system at a position upstream of the SCR catalyst component. The system further includes a controller that interprets an exhaust temperature value, an ambient temperature value, and a urea injection amount. The controller determines a urea deposit amount in response to the exhaust temperature value, the ambient temperature value, and the urea injection amount, and initiates a desoot regeneration event in response to the urea deposit amount. The desoot regeneration event includes operating the engine at a urea decomposition exhaust temperature. | 02-07-2013 |
20130031892 | EXHAUST GAS PURIFICATION DEVICE AND CONTROL METHOD FOR EXHAUST GAS PURIFICATION DEVICE - An exhaust gas purification device | 02-07-2013 |
20130031893 | Temp-A-Start Regeneration System - A regeneration module is usable in conjunction with a diesel engine to control the operation of a regeneration cycle of the diesel engine. During the regeneration cycle, particulate matter collected in or on a diesel particulate filter of the diesel engine is removed to improve the operation of the diesel particulate filter. In various embodiments, the regeneration module is connected to a remote operator such that the regeneration cycle is activated during desirable idle periods of the diesel engine as determined by the controller. | 02-07-2013 |
20130042597 | PASSIVE SCR CONTROL SYSTEM AND METHOD - A thermal management system includes an enable module, a status module and a temperature control module. The enable module enables generation of ammonia for use in selective catalytic reduction (SCR) catalysts of an exhaust system during a passive SCR mode. The status module determines whether the exhaust system is operating in a passive SCR mode and generates a passive SCR active signal. The passive SCR mode includes operating an engine with rich air/fuel ratios. The temperature control module activates electrical heating of an oxidation catalyst based on the passive SCR active signal and a temperature of the oxidation catalyst. | 02-21-2013 |
20130042598 | REDUCTANT DELIVERY UNIT FOR AUTOMOTIVE SELECTIVE CATALYTIC REDUCTION WITH GASKET ANTI-DEPOSIT SHIELDING STRUCTURE - A reductant delivery unit ( | 02-21-2013 |
20130047581 | Reagent Dosing System - A method of injecting a reagent into a stream of exhaust output from an engine to change the composition of the exhaust includes obtaining a target reagent injection rate. A calculation period is set to a time greater than one second. The target injection rate is multiplied by the time of the calculation period to determine an amount of reagent to be injected during the calculation period. An injection duty cycle is set. An injection duration is determined to inject the determined amount of reagent based on the injection duty cycle. The reagent is injected at the duty cycle for the injection duration. | 02-28-2013 |
20130047582 | CONTROL APPARATUS FOR TEMPERATURE EXCURSIONS WITHIN AN EXHAUST GAS TREATMENT SYSTEM - An exhaust gas treatment system for an internal combustion engine comprises a particulate filter assembly configured to receive exhaust gas from the engine. The particulate filter assembly comprises an electrically heated catalyst, a particulate filter disposed downstream of the electrically heated catalyst, a hydrocarbon injector, in fluid communication with the exhaust gas, upstream of the electrically heated catalyst and configured to inject excess hydrocarbon into the exhaust gas, an air pump in fluid communication with the exhaust gas upstream of the electrically heated catalyst and configured to deliver air to the exhaust gas to increase the volumetric gas flow rate through, and to decrease the heat residence time in, the particulate filter and a controller configured to operate the hydrocarbon injector, the electrically heated catalyst and the air pump based on predetermined exhaust gas flow rates, temperature thresholds and particulate loadings within the particulate filter. | 02-28-2013 |
20130047585 | METHOD FOR PREVENTING CHOKING OF UREA INJECTION NOZZLE ON SCR SYSTEM - A method for preventing choking of a urea injection nozzle in after run operation on a SCR system which supplies urea stored in a urea tank through a supply module, a urea injection nozzle and a urea line connecting the supply module and the urea injection nozzle, the method for preventing choking of a urea injection nozzle includes comparing pressure within the supply module with a first predetermined pressure (Pa), open controlling the urea injection nozzle when the pressure in the supply module is higher than the first predetermined pressure (Pa) or repeating open/close controlling the urea injection nozzle when the pressure in the supply module is lower than the first predetermined pressure (Pa), pressure equilibrium which recovers pressure in the supply module and stopping the after run operation when the balancing pressure is completed. | 02-28-2013 |
20130047586 | EXHAUST CATALYST PRE-HEATING SYSTEM AND METHOD - A system and method according to which exhaust is directed from a stationary exhaust source and through a burner, and a combustible fluid is vented from at least one combustible fluid source other than the stationary exhaust source. The combustible fluid is captured and directed to flow from the combustible fluid source and towards the burner, and at least air is mixed the captured combustible fluid to form a mixture. The mixture is introduced into the burner and burned therein to thereby pre-heat the exhaust flowing therethrough. The pre-heated exhaust contacts a catalyst. | 02-28-2013 |
20130055699 | SYSTEM FOR RECYCLING CAPTURED AGGLOMERATED DIESEL SOOT AND RELATED METHOD - A method of recycling captured agglomerated soot captured by and collected from a diesel emission control after-treatment (DECAT) system, the method comprising collecting captured agglomerated diesel soot (CADS) as a feedstock, loading the CADS into a controlled thermochemical conversion (TCC) process reactor, employing time-phased heat and pressure in the controlled TCC process reactor until the CADS sufficiently decompose to reclaim solids, liquid fuels and gases, piping pyrolysis oils (tars) and vapors produced in the controlled TCC process reactor to chambers, cooling and condensing the pyrolysis oils and vapors into a liquid form, and recirculating a pyrolysis gas produced in the controlled TCC process reactor for use as a source of heat and power. | 03-07-2013 |
20130061573 | SYSTEM FOR PURIFYING EXHAUST GAS AND METHOD FOR CONTROLLING THE SAME - An exhaust gas purification device may deactivate at least one of cylinders to supply a gasoline particulate filter with sufficient air according to a driving condition of a gasoline engine, and a control method thereof and a control method thereof may include comparing a pressure difference of the gasoline particulate filter with a predetermined value, determining a cylinder that may be to be deactivated when the pressure difference may be larger than the predetermined value, regenerating the gasoline particulate filter by supplying it with air through the deactivated cylinder, determining whether the engine may be in an over-run condition during the regeneration process, and returning to a general driving condition in a case that the engine may be in the over-run condition. | 03-14-2013 |
20130067889 | PRESSURE REGULATION VIA PUMP CONTROL FOR EXHAUST SYSTEM - A control system for a pump in a vehicle exhaust system includes a pump having an inlet port and an outlet port, a fluid supply in fluid communication with the inlet port, and a supply line in fluid communication with the outlet port. The supply line is configured to deliver fluid to an exhaust component. A controller is configured to adjust pump flow rate to maintain a desired pressure in the supply line. A restriction is utilized in a return flow path from the supply line. | 03-21-2013 |
20130067890 | METHOD OF OPTIMIZING OPERATING COSTS OF AN INTERNAL COMBUSTION ENGINE - A method to optimize operation of a diesel fuel engine having at least one aftertreatment device to reduce NOx is provided. An electronic control unit for a diesel engine with an aftertreatment device for the reduction of NOx is also provided. The method and the control unit optimize a quantity of fuel to be injected into an aftertreatment device based upon inputs relating to the cost of diesel fuel and the cost of diesel exhaust fluid. | 03-21-2013 |
20130067891 | EXHAUST AFTERTREATMENT SYSTEM - An exhaust aftertreatment system including a housing with two or more inlets configured to receive separate entering exhaust streams from an engine. The system may include two or more first exhaust treatment devices, each configured to receive one of the separate entering exhaust streams in a first direction. The system may further include two or more redirecting flow passages configured to combine the separate exhaust streams into a merged exhaust stream that flows in a second direction about 180 degrees from the first direction and an intermediate flow region configured to divide the merged exhaust stream into two or more separate exiting exhaust streams. The system also may also includes two or more second exhaust treatment devices, each configured to receive one of the separate exiting exhaust streams in a third direction about 90 degrees from the second direction. | 03-21-2013 |
20130074473 | TRIGGER ACTIVATED ADJUSTABLE PULSE WIDTH GENERATOR CIRCUIT FOR AUTOMOTIVE EXHAUST AFTER-TREATMENT AND INJECTION - A method adjusts a pulse width of a signal. The method provides a fixed voltage input trigger pulse ( | 03-28-2013 |
20130074474 | ENGINE OFF NH3 BASED SELECTIVE CATALYTIC REDUCTION NOX ADSORBER - An exhaust treatment system for an engine includes a selective catalyst reduction (SCR) treatment module that controls a valve and an air pump to deliver air to an SCR catalyst in response to the engine turning off. An SCR loading module controls the valve and the air pump to deliver air to an exhaust manifold and controls a dosing system to deliver a dosing agent upstream of the SCR catalyst when a temperature of the SCR catalyst is less than a temperature threshold and the SCR catalyst is not saturated with ammonia. | 03-28-2013 |
20130074475 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 03-28-2013 |
20130074476 | Method for Operating a Particle Filter - A method for operating a particle filter that filters particles contained in the exhaust of motor vehicle combustion engines. A conditioning step is performed such that the separation efficiency of the particle filter for particles is increased relative to the value existing in the new condition. | 03-28-2013 |
20130074477 | ON-BOARD DIAGNOSTIC METHOD FOR NO2 FORMATION IN AN OXIDATION CATALYST - The capacity of a platinum-containing diesel oxidation catalyst (DOC) to simultaneously convert NO to NO | 03-28-2013 |
20130086886 | ELECTRICALLY HEATED OXIDATION CATALYST PARTICULATE MATTER PROTECTION - A control method for a heating device of an oxidation catalyst is provided. The control method includes: estimating an accumulation of particulate matter on the heating device; and selectively controlling a switching device in electrical communication with the heating device based on the estimated accumulation. | 04-11-2013 |
20130086887 | Method For Reducing The Rate Of Exhaust Heat Loss - Disclosed is a method for reducing the rate of exhaust heat loss. The method comprises the steps of determining whether an engine is motoring and determining whether a diesel particulate filter needs to be regenerated. Further, the method comprises the step of closing an air throttle to a substantially closed position for reducing the flow of intake gas into the engine if the diesel particulate filter needs to be regenerated and if the engine is motoring. Further yet, the method comprises the step of opening the EGR valve to an at least partially open position for allowing the exhaust gas to recirculate through the engine if the diesel particulate filter needs to be regenerated and if the engine is motoring. | 04-11-2013 |
20130086888 | EXHAUST GAS PROCESSING DEVICE - An exhaust gas treatment method having a particulate matter (PM) sensor on which a part of PM exhausted from a diesel particulate filter (DPF) may be attached and that generates a signal, may include determining a sensor trap PM model amount that may be trapped on the PM sensor in a condition that the diesel particulate filter may be operated normal according to an engine driving condition and a variation thereof, determining a sensor trap PM real amount that may be attached on the PM sensor by using the signal that may be generated from the PM sensor, and determining a condition of the diesel particulate filter by comparing the sensor trap PM model amount and the sensor trap PM real amount. | 04-11-2013 |
20130086889 | METHOD AND DEVICE PERTAINING TO LIMITING THE TEMPERATURE OF A HC DOSING UNIT IN AN EXHAUST SYSTEM - A method pertaining to an HC dosing system for cleaning of exhaust gases from an engine ( | 04-11-2013 |
20130091826 | COLD START NO2 GENERATION SYSTEM - A cold start NO | 04-18-2013 |
20130091827 | MONITOR OF AMMONIA IN DOSING SYSTEM - An ammonia dosing system has a canister whose interior contains ammonia luminophores and a delivery apparatus for delivering ammonia from the canister interior into an exhaust after-treatment system to entrain with engine exhaust flowing toward an SCR catalyst for catalytic conversion of NO | 04-18-2013 |
20130091828 | System and Method for Regenerating Gasoline Particulate Filter - A system for regenerating a particulate filter mounted on an exhaust pipe of a gasoline engine including a plurality of cylinders and an ignition device for igniting fuel and air in the cylinder, a three-way catalyst device mounted on the exhaust pipe connected to the gasoline engine, and to oxidize or reduce exhaust gas, the particulate filter mounted on the exhaust pipe downstream of the three-way catalyst device to trap particulate matter and regenerate the particulate matter using heat of the exhaust gas, a differential pressure sensor mounted upstream and downstream of the particulate filter and to measure a pressure difference of the particulate filter, and a control portion to receive the measured pressure difference and control parameters to determine an amount of non-ignited fuel which is not ignited and flows to the three-way catalyst device among the fuel flowing into the plurality of cylinders. | 04-18-2013 |
20130091829 | METHOD AND DEVICE PERTAINING TO LIMITING THE TEMPERATURE OF A DOSING UNIT IN A SCR SYSTEM - A method pertaining to an SCR system for cleaning of exhaust gases from an engine ( | 04-18-2013 |
20130098001 | DIESEL ENGINE AND EXHAUST AFTERTREATMENT SYSTEM AND METHOD OF TREATING EXHAUST GASES FROM A DIESEL ENGINE - In a diesel engine and exhaust aftertreatment system, a controller is arranged to control operation of the engine to obtain a first set of exhaust characteristics and to control a fuel injector to inject fuel upstream of a DPF at a first rate of injection until at least one condition is attained, and, after the at least one condition is attained, to control the fuel injector so that a rate of fuel injection is reduced and to contra! operation of the engine to obtain a second set of exhaust characteristics so that regeneration of the DPF occurs. At least one characteristic of the first and second sets of characteristics beina, different. A method for treating, diesel engine exhaust is also disclosed. | 04-25-2013 |
20130104526 | SYSTEM AND METHOD FOR REDUCING MONO-NITROGEN OXIDE EMISSIONS | 05-02-2013 |
20130104527 | METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF SCR SYSTEMS | 05-02-2013 |
20130111876 | LOW COST LEAN NOx REDUCTION CATALYST SYSTEM - An exhaust aftertreatment system that includes a suitable combination of particulate catalyst materials is used to effectively reduce an amount of NO | 05-09-2013 |
20130111877 | SYSTEM AND METHOD FOR PARTICULATE FILTER REGENERATION - In one exemplary embodiment of the invention, a method of regenerating a particulate filter includes flowing an exhaust gas from an internal combustion engine into a particulate filter and determining a particulate level in the particulate filter. The method also includes performing a primary regeneration when the particulate level is below a first value, the primary regeneration including flowing exhaust gas with a selected amount of hydrocarbons in the exhaust gas into the particulate filter, and performing a secondary regeneration when the particulate level is above the first value, the secondary regeneration including flowing exhaust gas with an increased amount of nitrogen oxide into the particulate filter. | 05-09-2013 |
20130111878 | ENGINE AND AFTERTREATMENT OPTIMIZATION SYSTEM - An approach and system for engine and aftertreatment system optimization. Emissions of an engine may be reduced by an aftertreatment mechanism. Control of the engine and the aftertreatment mechanism may be coordinated for the best overall efficiency relative to both fuel consumption and the emissions reduction. Engine and aftertreatment control may also be optimized in terms of cost function minimization. Individual efficiencies of the engine and aftertreatment mechanism are not necessarily significant by themselves. Therefore, the engine and aftertreatment mechanism should be controlled in a manner to achieve the optimality of the engine and the aftertreatment mechanism together as one entity. | 05-09-2013 |
20130111880 | METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF HC DOSING SYSTEMS FOR EXHAUST CLEANING - A method for cooling a dosing unit pertaining to an HC dosing system for exhaust cleaning. The unit includes a dosing unit ( | 05-09-2013 |
20130111881 | METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF HC DOSING SYSTEMS FOR EXHAUST CLEANING - A method for cooling a dosing unit ( | 05-09-2013 |
20130111882 | METHOD PERTAINING TO AIR REMOVAL FROM A DOSING SYSTEM AT AN SCR SYSTEM AND A SCR SYSTEM - A method pertaining to an SCR system in which reducing agent in liquid form is supplied to a feed device ( | 05-09-2013 |
20130111883 | METHOD AND DEVICE PERTAINING TO DOSING UNIT OF SCR SYSTEM - A method pertaining to an SCR system for cleaning of exhaust gases from an engine including a dosing unit ( | 05-09-2013 |
20130111884 | METHOD PERTAINING TO AIR REMOVAL FROM A HC DOSING SYSTEM AND A HC DOSING SYSTEM - A method pertaining to an HC dosing system wherein fuel from a container ( | 05-09-2013 |
20130111885 | METHOD PERTAINING TO HC DOSING SYSTEMS AND DEVICE OF HC DOSING SYSTEMS - A method pertaining to an HC dosing system for cleaning exhaust gases from an engine ( | 05-09-2013 |
20130118149 | SYSTEMS AND METHODS FOR AN EXHAUST GAS TREATMENT SYSTEM - Various systems and methods are provided for an exhaust gas treatment system. In one example, a system includes an exhaust gas treatment device and a wire wrapped around an exterior circumference of the exhaust gas treatment device. Continuity of the wire is monitored such that degradation of the wire due to degradation of the exhaust gas treatment device is indicated. | 05-16-2013 |
20130118150 | EXHAUST SYSTEM FOR INTERNAL COMBUSTION ENGINE - In an exemplary embodiment of the invention an exhaust gas after treatment system for an internal combustion engine comprises an exhaust gas conduit configured to transport exhaust gas from the internal combustion engine to exhaust treatment devices of the exhaust gas treatment system. A controller in signal communication with the exhaust gas aftertreatment system is configured to monitor the temperature of a selective catalytic reduction device, wherein the controller is operable to move a valve assembly to an open position when the selective catalytic reduction device is at or above an operating temperature and to move the valve assembly to a closed position when the selective catalytic reduction device is below the operating temperature for entrainment of NOx constituents from the exhaust gas. | 05-16-2013 |
20130118151 | BOOST EXTRACTION METHOD OF SECONDARY AIR INJECTION FOR INTERNAL COMBUSTION ENGINE EMISSION CONTROL - A secondary air injection system to aid in the warm-up of a catalyst employed as part of an emissions control system of a vehicle to obtain efficient reduction in engine emissions. A compressor utilized to compress or boost air for increased engine performance is additionally used as a secondary air injection source, eliminating the need for external air pumps. The compressor is configured to transmit boosted air to the engine of the vehicle or to the catalyst to aid in the warm-up of the catalyst. A valve having an open configuration and a closed configuration controls the passage of the boosted air to the engine or to the catalyst. The valve may be controlled by a controller based upon airflow, temperature, pressure, or time. A control map relating engine speed to airflow may be used for obtaining airflow values for controlling the configuration of the valve. | 05-16-2013 |
20130118152 | METHOD AND DEVICE FOR CONTROLLING EFFECTIVE HEAT TRANSFER IN A SOLID GAS STORAGE SYSTEM - A method for controlling the effective heat transfer from a storage unit ( | 05-16-2013 |
20130118153 | METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF SCR SYSTEMS - A method for cooling a dosing unit ( | 05-16-2013 |
20130118154 | CONTROLLING OPERATION OF EXHAUST OF AN ENGINE INCLUDING A PARTICULATE FILTER - Methods and systems for controlling operation of exhaust of an engine including a particulate filter are described. One example method includes generating compressed air during engine operation, and storing the compressed air. The method further includes, during or after engine shutdown, pushing the compressed air through the particulate filter using a pressure of the compressed air. | 05-16-2013 |
20130118155 | CONTROL UNIT AND CONTROL METHOD FOR REDUCTANT SUPPLY DEVICE - A reductant supply device having a reductant injection valve with an injection tip that is fixed to an exhaust pipe on the exhaust gas upstream side of a reduction catalyst, the device directly injecting and supplying an urea aqueous solution which is pressure-fed to the reductant injection valve in a state of a liquid fluid, by controlling opening and closing of the reductant injection valve. The device includes a cooling water circulation passage; a flow rate control valve; a temperature sensor for detecting a temperature at the tip of the reductant injection valve; and a controller for controlling the flow rate control valve based on the temperature at the tip such that the temperature at the tip of the reductant injection valve is maintained at a temperature between equal to or higher than a boiling point of the urea aqueous solution and equal to or lower than 130° C. | 05-16-2013 |
20130118156 | EXHAUST GAS TEMPERATURE RAISING APPARATUS AND A METHOD FOR REMOVAL OF FUEL SUPPLY VALVE CLOGGING - The present invention is intended to provide a technique which serves to suppress unburnt HC from being discharged to a downstream side, when fuel is injected from a fuel supply valve for removing clogging thereof. The present invention is provided with a fuel supply valve that supplies fuel to an exhaust passage of an internal combustion engine, and an ignition unit that ignites the fuel supplied from the fuel supply valve, wherein in cases where there is a possibility that clogging may occur in an injection hole of the fuel supply valve, fuel for removal of clogging is injected from the fuel supply valve. An amount of the fuel to be injected from the fuel supply valve for removing clogging thereof is an amount of fuel which is able to be combusted by being ignited by means of the ignition unit. | 05-16-2013 |
20130125529 | METHOD FOR CONTROLLING REGENERATION WITHIN AN AFTER-TREATMENT COMPONENT OF A COMPRESSION-IGNITION ENGINE - A method for controlling regeneration within an after-treatment component of a compression-ignition engine comprises calculating an initial estimate of accumulated particulate matter based on a pressure-based soot accumulation model and a pressure drop index indicative of a decrease in pressure across the component. An adjusted estimate of accumulated particulate matter in the component is calculated based on the initial estimate and a soot prediction error inherent in the soot model. The adjusted estimate is compared to a predetermined threshold associated with the after-treatment component, and a remedial action is initiated when the adjusted estimate of accumulated particulate matter in the after-treatment component exceeds the predetermined threshold. The pressure-based soot accumulation model may be configured to predict soot accumulation in the absence of passive regeneration, and an adjusted kinetic burn model may be used to estimate a quantity of soot disposed through passive regeneration. | 05-23-2013 |
20130125530 | BYPASS HC - NOX ADSORBER STRATEGY - A bypass HC-NO | 05-23-2013 |
20130125531 | RESERVOIR AND TANK EQUIPPED WITH A SELF-REGULATING HEATING ELEMENT - A reservoir for holding a quantity of fluid within a tank, the reservoir including a first resistive element for heating a first part of the tank and a second resistive element for heating a second part of the tank, the second resistive element having a positive temperature coefficient. The reservoir further includes a third resistive element for heating the second part of the tank, the second resistive element and the third resistive element forming a parallel circuit, and the first resistive element being connected in series with the parallel circuit. | 05-23-2013 |
20130125532 | METHOD PERTAINING TO AIR REMOVAL FROM A HC DOSING SYSTEM AND A HC DOSING SYSTEM - A method pertaining to an HC dosing system in which fuel in liquid form is supplied to a feed device ( | 05-23-2013 |
20130133307 | POWER SYSTEM AND METHOD FOR ENERGIZING AN ELECTRICALLY HEATED CATALYST - A power system and a method for energizing an electrically heated catalyst are provided. The system includes a controller that generates a first control signal to set a switching device to a first operational state if the first temperature level downstream of the catalyst is less than a threshold temperature level and the engine is being decelerated. The controller further generates a second control signal to induce a generator to output a second voltage if the first temperature level is less than the threshold temperature level and the engine is being decelerated, such that the second voltage is applied through the switching device in the first operational state to the catalyst to increase a temperature of the catalyst. | 05-30-2013 |
20130133308 | Apparatus And Methods For Determination Of Total And Solid Carbon Content Of Engine Exhaust - The present disclosure provides apparatus and methods to determine real-time total carbon content, non-inclusive of carbon dioxide, and/or solid carbon content of engine exhaust. For a total carbon content determination, substantially all carbon dioxide is removed from the exhaust, and thereafter substantially all the remaining carbon of the exhaust is oxidized to provide a quantity of carbon dioxide which then may be used to determine total carbon content of the exhaust. For solid carbon content determination, in addition to substantially all carbon dioxide being removed from the exhaust, substantially all carbon-containing non-solid substances are also removed from the exhaust, and thereafter substantially all the remaining carbon of the exhaust is oxidized to provide a quantity of carbon dioxide which then may be used to determine solid carbon content of the exhaust. | 05-30-2013 |
20130133309 | METHODS FOR AN EXHAUST FLUID SENSOR - Various methods are provided for diagnosing an exhaust fluid sensor disposed in an exhaust fluid passage. By monitoring the sensor during conditions when it is in contact with the exhaust fluid and when it is not in contact with the exhaust fluid, an expected change in the sensor output can be monitored to identify whether the sensor is generating sufficiently accurate readings. | 05-30-2013 |
20130133310 | METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF SCR SYSTEMS - A method pertaining to an SCR system which includes a dosing unit ( | 05-30-2013 |
20130139488 | System And Method For Determining A Maximum Dose Rate Reductant - An exhaust gas treatment system for an internal combustion engine is provided, having an exhaust gas conduit, a reductant source, a temperature sensor, an intake mass air flow sensor, and a control module. The exhaust gas conduit is in fluid communication with, and is configured to receive an exhaust gas from the internal combustion engine. The exhaust gas contains oxides of nitrogen (“NO | 06-06-2013 |
20130145747 | Particulate trap regeneration - A particulate trap is regenerated with a valving mechanism downstream of the trap for periodically creating a reverse pressure of about 15 to 60 psig throughout the entire trap, a reversing apparatus operative after the reverse pressure is created for starting a regeneration cycle by creating a substantially instantaneous reverse pressure drop across the porous walls of the trap to dislodge accumulated particulate cake and by causing the filtered exhaust gas to flow back through the porous walls to remove the dislodged particulate from the trap, and controls for starting and stopping a regeneration cycle. | 06-13-2013 |
20130145748 | Method and Apparatus for Reducing Nitrogen Oxides in Internal Combustion Engine - To provide a method of reducing a nitrogen oxide in an exhaust gas of an internal combustion engine, an apparatus for reducing a nitrogen oxide, and an internal combustion engine system that can effectively reduce a nitrogen oxide in the exhaust gas of the internal combustion engine in a simple manner. A method of reducing a nitrogen oxide in an exhaust gas of an internal combustion engine includes: a step of moisturizing air at a pressure equal to or lower than atmospheric pressure by bringing the air into contact with one surface of a steam permeable membrane ( | 06-13-2013 |
20130152545 | DIESEL EISSION FLUID QUALITY DETECTION SYSTEM AND METHOD - An exhaust treatment system is provided including: a selective catalyst reduction (SCR) unit; a reducing agent dispensing unit configured to introduce a reducing agent into the exhaust; a first NO | 06-20-2013 |
20130152546 | Particulate Matter Detection Strategy In Exhaust Filter - Detecting particulate matter in an exhaust filter includes receiving data indicative of a time delay between transmission and reception of electromagnetic energy propagated through trapped particulate matter, and outputting a signal indicative of an amount of the trapped particulate matter responsive to the data. | 06-20-2013 |
20130152547 | Toroidal Combustion Chamber With Side Injection - In systems in which there is insufficient pressure difference between the intake and the exhaust to drive the EGR, an EGR pump is provided. In a dual-engine system, disclosed herein, the EGR system, i.e., the EGR cooler and EGR pump, is shared to obviate the need for two of each. Shutoff valves may be provided between the EGR system and a secondary of the two engines to isolate the secondary engine when it is not operating. When the engines are OPOC engines, exhaust aftertreatment devices, such as diesel oxidation catalysts and/or diesel particulate filters, may be placed upstream of where the EGR gases tee off from the engine's exhaust to thereby maintain a high pressure ratio across an exhaust turbine located downstream in the engine's exhaust. | 06-20-2013 |
20130152548 | AUTOMOTIVE CATALYTIC AFTERTREATMENT SYSTEM - A catalytic aftertreatment system for a diesel engine exhaust gas is described. The system comprises a diesel oxidation catalyst (DOC) and an aftertreatment device located downstream of the diesel oxidation catalyst (DOC), which aftertreatment device requires periodic heat treatment, and means to generate a temperature increase within the aftertreatment device, said diesel oxidation catalyst (DOC) comprising an upstream zone of length from 0.5 to 2 inches (12.7-50.81 mm) of higher oxidation activity for hydrocarbons (HC) than the remainder of the diesel oxidation catalyst (DOC). | 06-20-2013 |
20130152549 | METHOD AND SYSTEM FOR OPTIMIZING FUEL AND REDUCTANT CONSUMPTION - An operation mode of an engine and after-treatment system is determined based on a reductant-to-fuel cost ratio. The operation mode optimizes fuel consumption and reductant consumption in an engine system including an internal combustion engine and a selective catalytic reduction (SCR) catalyst while satisfying a target emissions emission level. | 06-20-2013 |
20130152550 | METHOD AND SYSTEM FOR DIESEL PARTICLE FILTER REGENERATION - A method for regeneration of a particle filter ( | 06-20-2013 |
20130152551 | METHOD AND APPARATUS FOR DECREASING FUEL COMSUMPTION DURING PARTICULATE FILTER GENERATION - A diesel particulate filter system comprising: a temperature sensor on the inlet side of the diesel particulate filter; a temperature sensor on the outlet side of the diesel particulate filter; a pressure sensor on the inlet side of the diesel particulate filter; and a control module in communication with the temperature sensors and the pressure sensor, and the control module is loaded with a look-up table that correlates the amount of soot loaded in the diesel particulate filter to a change in pressure measured by the pressure sensor; wherein the control module Initiates a regeneration cycle when soot loading of the diesel particulate filter achieves a predetermined soot load. | 06-20-2013 |
20130160429 | LIMITING NOX EMISSIONS - A method for controlling an internal combustion engine limits emission of undesirable compounds of nitrogen and oxygen and provides increased transient power. | 06-27-2013 |
20130160430 | SYSTEM AND METHOD OF CONTROLLING MAXIMUM HYDROCARBON INJECTION FOR DIESEL PARTICULATE FILTER REGENERATION - A method of providing hydrocarbons to an engine exhaust for regenerating a diesel particulate filter within an exhaust system of a diesel engine. A mass flow rate of exhaust gas within an exhaust system is determined. A mass flow rate of oxygen within the exhaust gas entering the diesel oxidation catalyst is determined. A set point indicative of an allowable mass flow rate of oxygen within the exhaust gas exiting the diesel oxidation catalyst is received. A hydrocarbon threshold that may be injected into the exhaust system is calculated. Hydrocarbons are injected into the exhaust system upstream of the diesel oxidation catalyst, wherein the injected hydrocarbons do not exceed the calculated threshold amount of hydrocarbons. | 06-27-2013 |
20130160431 | METHOD FOR WARMING AFTER-TREATMENT BURNER SYSTEM - Disclosed is a method for warming an after-treatment system in which a burner | 06-27-2013 |
20130167507 | SYSTEM AND METHOD FOR REGENERATING THE PARTICULATE FILTER IN A DIESEL ENGINE - In a diesel engine equipped with a system for automatic regeneration of a particulate filter, an automatic regeneration mode is inhibited in the case where there is recorded a number higher than a pre-set threshold of unfavorable event. When the automatic regeneration mode is inhibited, an on-demand regeneration mode is simultaneously enabled, which can be activated manually by the driver. If an on-demand regeneration is not performed before the vehicle has covered a certain mileage since the automatic regeneration mode was inhibited, the vehicle is set in a condition of limited performance. | 07-04-2013 |
20130167508 | CONTROL DEVICE OF DIESEL ENGINE - A control device of a diesel engine is provided. The device includes an engine body having a cylinder, a fuel injection valve for injecting fuel into the cylinder, a valve timing control module for changing opening and closing timings of at least an intake valve or an exhaust valve, an oxidation catalyst arranged within an exhaust passage for purifying HC discharged from the cylinder, and a DPF arranged downstream of the oxidation catalyst for capturing soot within exhaust gas. The device also includes a DPF regenerating module for supplying, when a predetermined DPF regeneration condition is satisfied, HC to the oxidation catalyst to regenerate the DPF by heat generated from an oxidation reaction of HC, and a fuel cutting module for stopping, when the diesel engine is in a deceleration state, a main injection of the fuel that is performed on a compression stroke of the cylinder. | 07-04-2013 |
20130167509 | CONTROL DEVICE OF DIESEL ENGINE WITH TURBOCHARGER - A control device of a diesel engine with a turbocharger is provided. The device includes an engine body having a cylinder, a fuel injection valve, a turbine of the turbocharger, a bypass passage for bypassing the turbine, a bypass valve for opening and closing the bypass passage, an oxidation catalyst for purifying HC, and a DPF for capturing soot. The device includes a fuel cutting module for stopping, when the diesel engine is in a deceleration state, a main injection of the fuel performed on compression stroke, a DPF regenerating module for performing, when a predetermined DPF regeneration condition is satisfied, a post injection on expansion stroke to supply HC to the oxidation catalyst and regenerate the DPF by heat generated from an oxidation reaction of HC, and a bypass valve control module for controlling the bypass valve. | 07-04-2013 |
20130167510 | INTERNAL COMBUSTION ENGINE WITH EXHAUST-GAS AFTERTREATMENT ARRANGEMENT AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF SAID TYPE - A method, comprising purging a storage catalytic convertor of stored NOx by diverting only a portion of incoming exhaust flow around the catalytic device while increasing injection of reductant to the storage catalytic convertor; and responsive to the diverting, adjusting injection of an ammonia-containing fluid into recombined exhaust flow upstream of an SCR catalytic convertor. Bypass of the storage catalytic convertor reduces available oxygen and air flow through the storage catalytic convertor, providing a more advantageous environment for reduction of NO | 07-04-2013 |
20130174536 | METHOD FOR PROTECTING A DPF OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for protecting a DPF in the exhaust section of an internal combustion engine of a motor vehicle from unintentional combustion of soot in the DPF. According to the invention, the motor vehicle is a hybrid vehicle having at least one electric machine and is able to be driven exclusively by one or more electric machine(s) for some time. The vehicle is operated in a DPF protection mode if the system detects that unintentional combustion of soot is taking place or threatening to take place in the DPF, initiating an automatic decoupling of the combustion engine from the wheel drive train, forward propulsion demands by the driver are met exclusively with the aid of the one or more electric machine(s), and the combustion engine is switched off completely or is operated with stable stoichiometric combustion. | 07-11-2013 |
20130180230 | SYSTEM AND METHOD FOR CONTROLLING REGENERATION WITHIN AN AFTER-TREATMENT COMPONENT OF A COMPRESSION-IGNITION ENGINE - Method for controlling regeneration within an after-treatment component of an engine comprises receiving an upstream temperature signal, receiving a downstream temperature signal, and calculating a temperature difference based on a difference between the upstream temperature signal and the downstream temperature signal. The temperature difference is compared to a predetermined temperature change limit to determine whether the temperature difference is less than or greater than the predetermined temperature change limit. If the temperature difference is less than the predetermined temperature change limit, an estimate of accumulated particulate matter in the after-treatment component is calculated using a primary soot accumulation model. If the temperature difference is greater than the predetermined temperature change limit, an estimate of accumulated particulate matter in the after-treatment component is calculated using a secondary soot accumulation model. The estimate of accumulated particulate matter in the after-treatment component is compared to a predetermined threshold associated with the after-treatment component. | 07-18-2013 |
20130186063 | EXHAUST SYSTEM AND METHOD FOR CONTROLLING AN EXHAUST SYSTEM - In one exemplary embodiment of the invention, a method for controlling an exhaust system includes determining an air to fuel ratio within a combustion chamber of an internal combustion engine, measuring a temperature of an exhaust gas flow from the internal combustion engine into the exhaust system and determining a specific heat for the exhaust gas flow in a first segment of the exhaust system based on the temperature of the exhaust gas flow from the internal combustion engine and the air to fuel ratio, wherein the first segment is upstream of the particulate filter. The method also includes determining a first temperature of the exhaust gas in the first segment based on the specific heat for the exhaust gas flow and selectively controlling a regeneration process for the particulate filter using the determined temperature of the exhaust gas at the selected location. | 07-25-2013 |
20130186064 | Exhaust Aftertreatment for NOx-Containing Exhaust From an Internal Combustion Engine - A method of treating NOx-containing exhaust from an internal combustion engine. An exhaust aftertreatment system has the following devices arranged in the following order downstream the exhaust manifold: a lean NOx trap (LNT), a particulate filter (PF) and a selective reduction catalyst (SCR) device. At least the LNT is located in the engine compartment. The SCR temperature at the input to, or in, the SCR is monitored to determine whether the aftertreatment system is to be operated in a cold mode or warm mode. Only during warm mode is reductant provided to the SCR, and during warm mode the LNT is not regenerated. | 07-25-2013 |
20130186065 | SULFUR ACCUMULATION MONITORING SYSTEMS AND METHODS - A system for a vehicle includes a change determination module, a sulfur determination module, and a final equivalence ratio (EQR) module. The change determination module estimates a change in an amount of sulfur within a catalyst of an exhaust system of the vehicle. The sulfur determination module estimates the amount of sulfur within the catalyst based on the change. The final EQR module selectively adjusts fueling of an engine based on the amount of sulfur. | 07-25-2013 |
20130186066 | CATALYST DETERIORATION DETECTION APPARATUS AND METHOD - A technique which accurately detects the deterioration of an exhaust gas purification catalyst which is applied to an internal combustion engine capable of using gas fuel and liquid fuel. Where only the gas fuel is used which is difficult to cause the oxygen occluded in the exhaust gas purification catalyst to be released therefrom even if the air fuel ratio of exhaust gas discharged from the internal combustion engine is changed to a rich side, a catalyst deterioration determination part determines whether the exhaust gas purification catalyst has deteriorated, based on either one of a change in an output of an oxygen concentration detection part only at a lean side, and changes in the output of the oxygen concentration detection part at the rich side and at the lean side. | 07-25-2013 |
20130186067 | METHOD FOR CONTROLLING THE REDUCTANT BUFFER LEVEL IN AN EXHAUST GAS AFTERTREATMENT DEVICE - A method for controlling a reductant buffer level in an exhaust gas after treatment device connectable downstream of an internal combustion engine includes performing a first reductant injection of a first amount upstream the exhaust gas after treatment device, performing a second reductant injection of a second amount upstream the exhaust gas after treatment device, which second amount is different to the first amount, evaluating the NOx conversion resulting from the first and second reductant injections downstream the exhaust gas after treatment device to obtain a first and second result, controlling a further reductant injection in dependence of the first and second results from the first and second NOx conversion evaluations. | 07-25-2013 |
20130186068 | METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF HC DOSING SYSTEMS FOR EXHAUST CLEANING - A method pertaining to an HC dosing system for exhaust cleaning for an engine which comprise a dosing unit ( | 07-25-2013 |
20130186069 | METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF SCR SYSTEMS - A method pertaining to an SCR system for exhaust cleaning, includes deciding about a need, after cessation of an exhaust flow, to cool a reducing agent dosing unit ( | 07-25-2013 |
20130186070 | DEVICES AND METHODS FOR COMPLIANT AFTERTREATMENT COMPONENT ASSEMBLY - A controller is configured to receive an input signal from a connection device of one or more aftertreatment components in an aftertreatment system for an internal combustion engine. The controller determines from the signal(s) whether the one or more aftertreatment components are properly installed for a particular aftertreatment system associated with the engine. | 07-25-2013 |
20130186071 | FUEL SUPPLY METHOD - The method of the present invention calculates based on the status of the exhaust emission purifier, a required supply of fuel to be supplied from the fuel supply valve to the exhaust passage, reads a unit fuel supply L | 07-25-2013 |
20130186072 | CONTROLLING HYDROCARBON INJECTION FOR FILTER REGENERATION - A method for providing hydrocarbons to an engine exhaust for regenerating a diesel particulate filter within an exhaust system of a diesel engine is provided. The diesel engine comprises an electronic control module, at least one cylinder, and at least one fuel injector in fluid communication with the at least one cylinder, and a diesel oxidation catalyst within the exhaust system. Temperature of a diesel oxidation catalyst output is monitored with an electronic control module. A total amount of hydrocarbons required for diesel particulate filter regeneration is calculated based upon the monitoring of the temperature of the diesel oxidation catalyst output. The total amount of hydrocarbons is injected into an exhaust system upstream of a diesel oxidation catalyst and at least one cylinder with a fuel injector as a post injection. | 07-25-2013 |
20130192202 | PARTICULATE MATTER RETAINING SYSTEM - Methods and systems are provided for passive regeneration of a particulate matter filter coupled to a gasoline engine. During vehicle deceleration conditions, an engine is operated leaner than stoichiometry over two subsequent lean phases, including an initial longer and leaner phase followed by a shorter and less lean phase. By passively regenerating the filter using intermittent lean engine operation, engine performance can be improved. | 08-01-2013 |
20130192203 | EXHAUST SYSTEM - An exhaust system includes an exhaust passage configured to receive exhaust from a combustion engine, a heat exchanger disposed within the exhaust passage, and a reductant supply fluidly connected to the heat exchanger, the reductant supply including methane. The exhaust system also includes a first catalyst fluidly connected to the heat exchanger and configured to receive methane from the reductant supply via the heat exchanger. The exhaust system further includes a second catalyst disposed within the exhaust passage and configured to receive the exhaust from the combustion engine via the heat exchanger. The exhaust system also includes a clean-up catalyst disposed within the exhaust passage and configured to receive a combined flow. The combined flow includes the exhaust and the methane exiting the first catalyst. | 08-01-2013 |
20130192204 | DEVICE FOR PROVIDING LIQUID REDUCING AGENT, METHOD FOR THAWING FROZEN REDUCING AGENT AND MOTOR VEHICLE HAVING THE DEVICE - A device for providing a liquid reducing agent includes a reducing agent tank for storing the liquid reducing agent. The reducing agent tank has at least one heater disposed in a movable manner in the reducing agent tank and constructed as an active heater. A method for thawing frozen reducing agent and a motor vehicle having the device are also provided. | 08-01-2013 |
20130192205 | SYSTEMS AND METHODS FOR CONTROLLING TEMPERATURE AND TOTAL HYDROCARBON SLIP - Systems and methods for controlling temperature and total hydrocarbon slip in an exhaust system are provided. Control systems can comprise an oxidation catalyst, a particulate filter, a fuel injector, and a processor for controlling a fuel injection based on an oxidation catalyst model. Example system includes a virtual sensor comprising a controller for calculating and providing the total hydrocarbon slip to subsystems for after-treatment management based on modeling the oxidation catalyst. Example methods for controlling the temperature and the total hydrocarbon slip in an exhaust system include the steps of providing an oxidation catalyst model, monitoring a condition of the exhaust system, calculating a hydrocarbon fuel injection flow rate and controlling a fuel injection. The example methods further include the steps of determining an error in the oxidation catalyst model based on the monitored condition and changing the oxidation catalyst model to reduce the error. | 08-01-2013 |
20130192206 | METHOD FOR DETECTING UREA DEPOSITS IN AN EXHAUST LINE OF AN AUTOMOTIVE VEHICLE, METHOD FOR ELIMINATING UREA DEPOSITS AND AUTOMOTIVE VEHICLE ADAPTED TO SUCH METHODS - A method is provided for detecting urea deposits in an exhaust line of an automotive vehicle and includes determination if an exhaust gases temperature is reached, if the result of determination is positive, stoppage of urea injection, and determination of the quantity of NOx in the exhaust gases on the outlet of the selective catalytic reduction system. A comparison is performed between the quantity of NOx determined on the outlet of the selective catalytic reduction system and a theoretical quantity or a measured quantity of NOx produced by the internal combustion engine. If the comparison shows that the quantities are different, it is considered that urea deposits are present in the exhaust line. The vehicle is arranged to stop operation of the urea injection system, to compare a quantity of NOx measured by the NOx sensor to a theoretical NOx quantity or a measured NOx quantity produced by the internal combustion engine, and to perform cleaning of the exhaust line on the basis of the result of the comparison between the quantities. | 08-01-2013 |
20130192207 | REDUCING AGENT SUPPLY APPARATUS, METHOD FOR CONTROLLING THE SAME, AND EXHAUST GAS PURIFICATION APPARATUS - [Problem] To provide a reducing agent supply apparatus that can quickly melt urea aqueous solution solidified in a reducing agent injection valve to allow early start of the injection control of urea aqueous solution, a method for controlling the reducing agent supply apparatus, and an exhaust gas purification apparatus. | 08-01-2013 |
20130199157 | SYSTEMS AND METHODS FOR CONTROLLING REDUCTANT DELIVERY TO AN EXHAUST STREAM - Methods and systems are disclosed for determining a feed rate for direct introduction of a reductant gas into an exhaust stream to achieve a NO | 08-08-2013 |
20130199158 | SYSTEM, METHOD, AND APPARATUS FOR DETERMINING SOLID STORAGE MEDIA QUALITY FOR A NOX REDUCTANT - A system and method includes an exhaust aftertreatment system for an internal combustion engine having a reductant stored in a solid storage media. The reductant is released by heating the solid storage media to convert the reductant to gaseous form. The system and method determines the quality of the solid storage media by measuring operating parameters of the aftertreatment system and comparing the operating parameters to expected parameters stored in a memory of a controller of the system. | 08-08-2013 |
20130199159 | METHOD FOR CONTROLLING REGENERATION WITHIN AN AFTER-TREATMENT COMPONENT OF A COMPRESSION-IGNITION ENGINE - A method for controlling regeneration within an after-treatment component of a compression-ignition engine includes receiving a value of a parameter associated with an exhaust stream passing through the after-treatment component and determining a rate of change of the parameter. A filtered parameter value is calculated based on the value of the parameter, the rate of change of the parameter, and a predetermined filtering relationship for the parameter. Accumulated particulate matter in the after-treatment component is estimated based, at least, on a soot accumulation model and the filtered parameter value. The estimate of accumulated particulate matter in the after-treatment component is compared to a predetermined threshold associated with the after-treatment component, and a remedial action is initiated when the estimate of accumulated particulate matter in the after-treatment component exceeds the predetermined threshold. | 08-08-2013 |
20130199160 | AFTERTREATMENT SYSTEM FOR AN ENGINE - A system includes an internal combustion engine. An aftertreatment system is coupled to the internal combustion engine to receive an exhaust gas stream. The aftertreatment system comprises one or modules. Each module includes one or more emission reducing devices to reduce undesirable constituents in the exhaust gas stream from the internal combustion engine. | 08-08-2013 |
20130205756 | LIQUID REDUCTANT SYSTEM AND METHOD FOR OPERATION OF THE LIQUID REDUCTANT SYSTEM - A liquid reductant injection system is provided. The liquid reductant injection system includes a storage tank housing a reductant solution, a return conduit extending into the storage tank, the return conduit including an outlet positioned in the storage tank, and a thermosyphon comprising an evaporator coupled to an exhaust conduit and in fluidic communication with a condenser coupled to a portion of the return conduit inside the storage tank, the condenser positioned vertically above the evaporator. | 08-15-2013 |
20130205757 | RECHARGE DEVICE AND METHOD FOR NH3 CARTRIDGE - A device and method relating to the storage and delivery of ammonia for use in an after-treatment device for NO | 08-15-2013 |
20130213008 | METHOD AND SYSTEM FOR IMPROVING THE ROBUSTNESS OF AFTERTREATMENT SYSTEMS - A method for treating a catalyst in an internal combustion engine is disclosed. The method comprises detecting the efficiency of a catalyst; sending the catalyst efficiency to a threshold monitor; and heating the catalyst when the detected catalyst efficiency is below a predetermined percentage. | 08-22-2013 |
20130213009 | METHOD FOR INITIATING AND MAINTAINING A SUBSTOICHIOMETRIC OPERATING MODE OF AN INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE FOR CARRYING OUT A METHOD OF THIS KIND - The present disclosure describes systems and methods for recharging a storage catalyst of an internal combustion engine. A method is described, comprising: while operating an engine in a substoichiometric operating mode when the engine is under medium load and responsive to an LNT condition, assisting the engine with an electric machine connected to an engine crankshaft. The electric machine provides an auxiliary drive to assist the engine in maintaining the substantially steady state substoichiometric operating mode which may be used to reduce NO | 08-22-2013 |
20130213010 | Electric Heating Assisted Passive and Active Regeneration for Efficient Emission Controls of Diesel Engines - A method of heating an exhaust gas in an exhaust aftertreatment system including a Diesel Oxidation Catalyst (DOC) and a diesel particulate filter (DPF) is provided. The method includes heating the exhaust gas to a predetermined temperature to increase NO | 08-22-2013 |
20130213011 | METHOD FOR REDUCING THE AMOUNT OF NOX IN THE EXHAUST GASES OF A MOTOR VEHICLE - The invention relates to a method for controlling a system for reducing the amount of NOx in the exhaust gases of a motor vehicle. The system comprises a storage chamber ( | 08-22-2013 |
20130213012 | METHOD TO DETECT AND MITIGATE UNSOLICITED EXOTHERMS IN A DIESEL AFTERTREATMENT SYSTEM - Methods for monitoring and detecting undesired exotherms which may occur in an exhaust aftertreatment system coupled to a lean burning combustion engine are described. In one particular approach, an undesired exotherm may be indicated based on an expected oxygen depletion along a length of an exhaust aftertreatment system in the direction of exhaust gas flow of exhaust gas. For example, during DPF regeneration, a certain amount of oxygen is expected to be utilized for removing soot. If less oxygen is actually found in the exhaust downstream of the exhaust system, then an undesired exotherm may be present, as unintended reductant may be present in the exhaust and reacting exothermically with oxygen. Various mitigation actions may then be initiated in response to the indication of an undesired exotherm. | 08-22-2013 |
20130219861 | Use of Braking Energy to Augment Exhaust Heat for Improved Operation of Exhaust Aftertreatment Devices - A method and system for raising the operating temperature of an emissions control device of an automotive vehicle. A generator converts the vehicle's mechanical braking energy to electrical energy. The electrical energy is delivered, without electrical storage, to an electric heater that heats either the emissions control device or the exhaust gas at the input to the device. | 08-29-2013 |
20130219862 | CONTROL SYSTEM FOR DETERMINING BIOFUEL CONTENT - A system includes an internal combustion engine having an air intake, a fuel inlet, and exhaust outlet. The system further includes a NO | 08-29-2013 |
20130219863 | EXHAUST GAS CONTROL APPARATUS AND METHOD - An exhaust gas control apparatus includes: a fuel supply portion that is provided so as to supply fuel to a portion of an exhaust passage, which is upstream of an exhaust gas purification member provided in the exhaust passage; a heating portion that is disposed between the fuel supply portion and the exhaust gas purification member; and a control portion that controls an amount of electric power that is supplied to the heating portion, based on an exhaust gas temperature and an exhaust gas flow rate. | 08-29-2013 |
20130219864 | Method for Operating an Internal Combustion Engine - In a method for operating an air-compressing fuel-injection internal combustion engine having an exhaust gas post-treatment system with a particle filter and a nitrogen oxide reduction catalytic converter, a plurality of internal combustion engine operating settings are provided, each having respective predefined values for predefined internal combustion engine operating parameters. A heating operating setting is set when the internal combustion engine is warming up, while a basic operating setting is set in the warmed-up state. When the temperature in the exhaust gas system exceeds a predefinable first value, the heating operating setting is changed over to the basic operating setting. In the warmed-up state, at least one further (third) operating setting, with an exhaust gas recirculation rate that is reduced compared to the basic operating setting, is provided in addition to the basic operating setting. | 08-29-2013 |
20130219865 | VEHICLE RELOCATABLE EXHAUST SYSTEM COMPONENTS - Modification of reductant (e.g., diesel exhaust fluid, DEF) tank location, for example during vehicle up-fitting may result in less than optimal operation of the DEF system due to inaccurate DEF system calibration. In one example approach, the above issue can be at least partially addressed by adjusting control system parameters for system control and diagnostics based on an input indicative of, or any modification to, the DEF tank location. In this way, DEF tank location flexibility is maintained, while also maintaining emission control and diagnostic accuracy. | 08-29-2013 |
20130219866 | EXHAUST-GAS PURIFICATION DEVICE, METHOD FOR EXHAUST-GAS PURIFICATION, CATALYTIC CONVERTER AND PYROLYSIS REACTOR - The present invention relates to an exhaust gas purification device with which combustion gases originating from combustion devices, in particular diesel engines, can be purified. With the exhaust gas purification device, at least one regeneration of the particulate filters and/or of the NOx catalyst can be achieved. | 08-29-2013 |
20130227933 | ENGINE CONTROL SYSTEM AND METHOD FOR INITIATING A DIESEL PARTICULATE FILTER REGENERATION - An engine command override may occur when a diesel particulate filter (DPF) requires regeneration. The need for regeneration may be indicated by regeneration level. The engine may be operated in a normal mode when the DPF regeneration level is below a regeneration level threshold, wherein the engine command is based on the throttle input. Additionally, the engine may be operated in an override mode when the DPF regeneration level is above a regeneration level threshold and the engine is operating in the idle state, wherein the engine command is based on a predetermined throttle regeneration setting. | 09-05-2013 |
20130227934 | AFTERTREATMENT BURNER AIR SUPPLY SYSTEM - A system and method for efficient regeneration of a diesel particulate filter used in the exhaust system of a diesel engine, is disclosed. In various systems, a burner is incorporated into the exhaust stream, and prior to the diesel particulate filter. Because the burner requires precise amounts of fuel and air to operate properly, an air flow delivery device, such as a positive displacement pump or blower is incorporated into the system to channel boost air to the burner. Alternatively, a bypass line may be used in conjunction with a pressure regulator, wherein the bypass line diverts the boost air from the pump or blower, while the pressure regulator controls the final pressure to the burner. | 09-05-2013 |
20130227935 | DIAGNOSTICS FOR HYDROCARBON INJECTION FOR FILTER REGENERATION - A method of determining a malfunction in a hydrocarbon injection system for an internal combustion engine having an exhaust system with a diesel particulate filter and a diesel oxidation catalyst, is provided. An efficiency of a diesel oxidation catalyst to convert hydrocarbons injected for regeneration of a diesel particulate filter into heat is estimated based upon an input temperature of the diesel oxidation catalyst, an output temperature of the diesel oxidation catalyst, and an output temperature of a diesel particulate filter. The estimated efficiency is compared to a predetermined stored efficiency value. An indication of a malfunction is generated when the comparison of the estimated efficiency to the predetermined stored efficiency exceeds a threshold amount. | 09-05-2013 |
20130232952 | SYSTEMS AND METHODS USING INTERNAL EGR FOR AFTERTREATMENT SYSTEM CONTROL - An internal combustion engine system includes: an engine with a plurality of pistons housed in respective ones of a plurality of cylinders; an air intake system to provide air to the plurality of cylinders through respective ones of a plurality of intake valves; an exhaust system to release exhaust gas from the plurality of cylinders through respective one of a plurality of exhaust valves; an aftertreatment system to treat exhaust emission from the engine; at least one sensor to provide a sensor signal corresponding to an efficiency of the aftertreatment system; and a controller coupled to the at least one sensor and operable to regulate an internal exhaust gas recirculation operation in the cylinders when the aftertreatment system operates at less than a desired efficiency. | 09-12-2013 |
20130232953 | EXHAUST-GAS AFTERTREATMENT SYSTEM AND METHOD FOR EXHAUST-GAS AFTERTREATMENT - An exhaust-gas aftertreatment system ( | 09-12-2013 |
20130232954 | METHOD FOR OPERATING A METERING APPARATUS, METERING APPARATUS AND MOTOR VEHICLE HAVING A METERING APPARATUS - A method for operating a metering apparatus for reducing agent includes providing the metering apparatus with at least one movable pump element movable between upper and lower reversal points to convey reducing agent into an exhaust-gas treatment component, and at least one position transmitter for determining a pass of the movable pump element. In the method, a first detection of a position of the movable pump element is provided by the position encoder. Subsequently, the movable pump element is moved and reducing agent is metered into the exhaust-gas treatment component. Thereupon, a second detection of a position of the movable pump element is provided by the position encoder, and subsequently a first quantity of reducing agent which is metered between the first and second detections is determined. A metering apparatus and a motor vehicle having a metering apparatus are also provided. | 09-12-2013 |
20130232955 | Engine Exhaust Systems with Secondary Air Injection Systems - A variety of embodiments of exhaust systems for engines including small off-road engines, and related methods of operation, are disclosed. In at least some embodiments, the exhaust system includes a first conduit that receives exhaust emissions from a first engine cylinder, and a second conduit that communicates air to a first port on the first conduit. The air mixes with the exhaust emissions within the first conduit so as to produce a chemical reaction, and a level of at least one undesirable component of the exhaust emissions is reduced. Further, the exhaust system does not include any catalytic converter. In some embodiments, the exhaust system further comprises a crankcase ventilation system. | 09-12-2013 |
20130232956 | EXHAUST POST-TREATMENT DEVICE AND METHOD FOR A VEHICLE, WITH A REDUCTANT VAPORISING SURFACE BEING WARMED BY A PELTIER ELEMENT - An exhaust post-treatment device ( | 09-12-2013 |
20130239546 | MIXING SYSTEM - A mixing system is provided. The mixing system includes a housing defining a boundary of a mixing conduit including an expansion section with an injector mount and a reductant diverter extending into the conduit upstream of the injector mount in the expansion section. The mixing system further includes an atomizer with openings positioned in the housing and a helical mixing element positioned in the housing. | 09-19-2013 |
20130239547 | Integrated WGS/ECD Exhaust Treatment Device for Internal Combustion Engine Having Dedicated EGR - An integrated water-gas-shift (WGS) and emissions control device (ECD) catalyst for treating exhaust from an internal combustion engine. The engine is assumed to have an EGR loop, such that exhaust is recirculated back to the engine's intake. A WGS catalyst on the EGR loop, for conditioning the EGR flow, is integrated with a catalyzed ECD on the main exhaust line, for reducing pollutant emissions. | 09-19-2013 |
20130239548 | Exhaust Treatment Secondary Air Supply System - A system for treating the exhaust output by an internal combustion engine includes a regeneration positioned upstream from a diesel particulate filter. The regeneration unit combusts a fuel to heat the exhaust entering the diesel particulate filter. An air pump supplies a secondary source of compressed air to the regeneration unit and is adapted to be driven by the internal combustion engine. A speed sensor is coupled to the air pump and operable to output a signal indicative of a rotational speed of an air pump component. A controller receives the speed sensor signal and determines an operating speed of the internal combustion engine based on the speed sensor signal. The controller controls the regeneration unit based on the engine operating speed. | 09-19-2013 |
20130239549 | AFTERTREATMENT SYSTEM AND METHOD FOR PRE-DECOMPOSED REDUCTANT SOLUTION - There is disclosed a method and system for pressurizing a reductant solution from a reductant storage device and superheating the pressurized reductant solution. The superheated pressurized reductant solution at least partially decomposes in the heat exchanger and/or a decomposition chamber before it is released into an exhaust system. The at least partially decomposed reductant solution is delivered to the exhaust system upstream of the SCR catalyst. | 09-19-2013 |
20130239550 | FLEXIBLE REGENERATION TIME OF DIESEL PARTICULATE FILTER BASED ON FUEL EFFICIENCY - A method of controlling an exhaust gas treatment system includes measuring a quantity of fuel used by the vehicle during a defined time period of a regeneration event, and estimating a quantity of particulate matter being burnt from a particulate filter during the defined time period to define a particulate matter burn rate. The quantity of fuel used is compared with the calculated particulate matter burn rate to define a regeneration fuel efficiency ratio. The regeneration fuel efficiency ratio is compared to a minimum regeneration fuel efficiency rate to determine if the regeneration event is an efficient use of fuel or is not an efficient use of fuel. The regeneration event is stopped prior to an estimated completion of the regeneration event when the comparison of the regeneration fuel efficiency ratio to the minimum regeneration fuel efficiency rate indicates that the regeneration event is not an efficient use of fuel. | 09-19-2013 |
20130239551 | METHOD OF SETTING A PARTICULATE FILTER REGENERATION SETPOINT BASED ON EXHAUST FLOW MASS - A method of defining a target regeneration temperature setpoint for exhaust gas upstream of a particulate filter of an exhaust gas treatment system includes as defining the regeneration temperature setpoint to include an idle temperature setpoint when the current vehicle operating mode is classified as an idle mode, and defining the regeneration temperature setpoint to include a driving temperature setpoint when the current vehicle operating mode is classified as a driving mode. The idle temperature setpoint and the driving temperature setpoint are derived individually of and separately from each other, and are based on different criteria. | 09-19-2013 |
20130247543 | EXHAUST GAS CONTROL APPARATUS AND CONTROL METHOD FOR EXHAUST GAS CONTROL APPARATUS - An exhaust gas control apparatus includes a control device controlling a urea addition valve for adding urea from an upstream side of a NOx reduction catalyst. The control device obtains an ammonia adsorption amount distribution through the NOx reduction catalyst. When an ammonia adsorption amount in a predetermined part on a downstream side equals or exceeds a predetermined threshold, the control device controls the urea addition valve to stop the urea supply or reduce the amount thereof. The urea addition valve is controlled based on an adsorption amount distribution obtained from a model on which the catalyst is divided into cells such that an ammonia adsorption amount in a first cell positioned furthest upstream equals or exceeds a predetermined threshold close to a saturation adsorption amount and an ammonia adsorption amount in a second cell positioned downstream of the first cell reaches a predetermined target value smaller than the threshold. | 09-26-2013 |
20130247544 | HYDROCARBON RETAINING AND PURGING SYSTEM FOR FLEX-FUEL COMBUSTION ENGINE - Systems, methods, and computer readable storage media are described in which exhaust gas is routed to a hydrocarbon retaining device during starting, and purged to the engine intake manifold. Various alternative approaches are described for controlling operation and diagnosing degradation. Further, various interrelated configurations are described. | 09-26-2013 |
20130255227 | SYSTEM AND METHOD FOR HYDROCARBON ADSORBER REGENERATION IN A HYBRID VEHICLE - A control system for a hybrid vehicle is presented. The control system can include an air/fuel ratio control module that selectively commands a rich air/fuel ratio upon starting an engine based on a temperature of an electrically heated catalyst (EHC) in an exhaust system of the engine, wherein the EHC includes a hydrocarbon (HC) adsorber. The control system can include an air pump control module that selectively activates an air pump supplying air into the exhaust system upstream from the EHC based on whether the engine is on and at least one of whether the HC adsorber is full and whether the EHC is saturated with oxygen. The control system can also include an electric heater control module that selectively activates an electric heater of the EHC based on whether the engine is on and the temperature of the EHC, as well as whether the HC adsorber is full. | 10-03-2013 |
20130255228 | CATALYST DETERIORATION DIAGNOSIS METHOD, METHOD FOR PURIFICATION OF EXHAUST GAS USING THE DIAGNOSIS METHOD, CATALYST DETERIORATION DIAGNOSIS APPARATUS, AND APPARATUS FOR PURIFICATION OF EXHAUST GAS USING THE DIAGNOSIS APPARATUS - A catalyst deterioration diagnosis method for diagnosing deterioration of a catalyst for purification of exhaust gas by using a test catalyst disposed in an exhaust gas flow path through which the exhaust gas flows, the method including an exhaust gas control step of inverting an air-fuel ratio of the exhaust gas in the flow path from a lean side to a rich side or from a rich side to a lean side; a measurement step of measuring a change over time in electrical resistance of the test catalyst at the inversion of the air-fuel ratio and finding a resistance change ratio of the test catalyst; and a determination step of determining catalytic deterioration of the test catalyst based on the resistance change ratio. | 10-03-2013 |
20130255229 | METHOD FOR USE IN CONJUNCTION WITH AN EXHAUST-GAS AFTERTREATMENT SYSTEM - A method for an exhaust-gas aftertreatment system which is operated on an internal combustion engine operated with an excess of air, in which exhaust-gas aftertreatment system soot particles are separated out of exhaust gas by a particle filter and the particle filter is regenerated with the aid of NO | 10-03-2013 |
20130255230 | EXHAUST HEATING DEVICE FOR INTERNAL COMBUSTION ENGINE AND CONTROL METHOD THEREFOR - An internal combustion engine in which first and second turbochargers are incorporated in series has first and second bypass passages bypassing exhaust turbines of the first and second turbochargers and two opening/closing valves for opening/closing the first and second bypass passages respectively. An exhaust gas heating device for heating exhaust gas being led to an exhaust purifying device from the engine is disposed in an exhaust passage so as to be located upstream of a confluent portion of the exhaust passage and the second bypass passage and downstream of the turbine of the second turbocharger. A valve capable of regulating the flow rate of exhaust gas flowing in the exhaust passage is disposed in the exhaust passage so as to be located downstream of a branched portion of the exhaust passage and the second bypass passage and upstream of the turbine of the second turbocharger. | 10-03-2013 |
20130263575 | SYSTEM AND METHOD FOR CONTROLLING AN EXHAUST SYSTEM HAVING A SELECTIVE CATALYST REDUCTION COMPONENT - A method for controlling operation of an SCR component includes receiving a signal reflecting a sensed condition of an exhaust stream associated with the SCR component, estimating an apparent aging time of the SCR component based on the sensed condition of the exhaust stream, and setting an operating condition of the SCR component based on the apparent aging time of the SCR component. | 10-10-2013 |
20130263576 | INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING INTERNAL COMBUSTION ENGINE SPEED - In one exemplary embodiment of the invention a method for controlling a speed of an internal combustion engine includes shutting off fuel flow into a cylinder to reduce the speed of the internal combustion engine. The method also includes providing an electrical load to an alternator of the internal combustion engine, further reducing the speed of the internal combustion engine. | 10-10-2013 |
20130263577 | NON-METHANE HYDROCARBON CONVERSION EFFICIENCY DIAGNOSTIC FOR A DIESEL AFTER-TREATMENT SYSTEM - A method of assessing non-methane hydrocarbon (NMHC) conversion efficiency in a diesel after-treatment (AT) system having a diesel oxidation catalyst (DOC) arranged upstream of a diesel particulate filter (DPF) includes regenerating the AT system. Additionally, the method monitors DOC inlet and outlet temperatures during the regeneration. The method also assesses whether the DOC is operating at or above threshold efficiency by determining a DOC inlet/outlet temperature difference and comparing the determined inlet/outlet temperature difference with a threshold inlet/outlet temperature difference. The method also monitors DPF outlet temperature if the DOC is operating at or above the threshold efficiency and determines a DOC temperature/DPF outlet temperature difference. The method additionally assesses whether NMHC conversion efficiency of the DPF is at or above a threshold value by comparing the determined DOC temperature/DPF outlet temperature difference with a threshold DOC temperature/DPF outlet temperature difference. A system and a vehicle are also disclosed. | 10-10-2013 |
20130263578 | METHOD FOR DIAGNOSING OPERATION OF A PARTICULATE MATTER SENSOR - A method for diagnosing a particulate matter sensor is described. In one example, a liquid is purposefully injected into the exhaust system to verify operation of the particulate matter sensor. Reliability of particulate matter diagnostics may be improved by way of the approach, at least during some conditions. | 10-10-2013 |
20130263579 | EXHAUST HEATING DEVICE FOR INTERNAL COMBUSTION ENGINE AND CONTROL METHOD THEREFOR - An exhaust heating device for heating an exhaust gas led to an exhaust purifying device from an engine is disposed in a second exhaust passage that is located upstream of a confluent portion of a first exhaust passage connected through a turbine of a first turbocharger to the purifying device and the second passage connected to the purifying device through a turbine of a second turbocharger used primarily in a lower speed range of the engine than the first turbocharger in a state of bypassing the turbine of the first turbocharger and downstream of the turbine of the second turbocharger. A valve for regulating a flow of the exhaust gas in the second passage is disposed in the second passage that is located downstream of a branched portion of the first and second passages and upstream of the turbine of the second turbocharger. | 10-10-2013 |
20130269317 | TECHNIQUE FOR PRODUCTION OF AMMONIA ON DEMAND IN A THREE WAY CATALYST FOR A PASSIVE SELECTIVE CATALYTIC REDUCTION SYSTEM - A powertrain includes an internal combustion engine with multiple cylinders and an aftertreatment system having a selective catalytic reduction device utilizing ammonia as a reductant. An ammonia generation cycle includes operating some portion of the cylinders at an air/fuel ratio conducive to producing molecular hydrogen and some portion of the cylinders at an air/fuel ratio conducive to producing NOx. An ammonia generation catalyst is utilized between the engine and the selective catalytic reduction device to produce ammonia. | 10-17-2013 |
20130269318 | COOLANT-TO-CATALYST FUEL MODIFICATION METHOD AND APPARATUS - A catalytic apparatus for efficient pre-combustion refinement of fossil fuel in vehicular engines, including an elongated outer metal pipe containing an elongated stainless steel inner tube of smaller diameter. The outer pipe is crimped or welded onto the inner tube to create a fuel chamber with connectors for the inflow and outflow of fossil fuel therethrough. The fuel chamber contains at least three catalytic elements each comprised of a different metal selected from the group Au, Cu, Ir, Ni, Pd, Pt, Zn and platiniridium, which may be electroplated small-pore screens. As engine coolant is diverted through the inner tube, excess heat is transferred to the inflowing fuel. The fuel is forced to flow in close proximity to the inner tube for maximum convection, and through the catalytic elements before flowing out through the fuel line to the fuel injectors for more efficient combustion. | 10-17-2013 |
20130269319 | Method And Device For Operating An Internal Combustion Engine - An internal combustion engine has an exhaust gas sensor upstream of or in an exhaust gas catalytic converter, and having a measurement signal corresponding to a residual oxygen content of the exhaust gas flowing past the exhaust gas sensor. For operation, an air ratio is specified, a specified forced stimulation is applied thereto, and at least one actuator that influences the mixture is set by appropriately controlling the actuator. In correlation with a rising edge of the forced stimulation, a first maximum value of the air ratio is determined according to the signal profile of the exhaust gas sensor measurement signal during a first measurement duration, and a second maximum value of the air ratio is determined according to the exhaust gas sensor measurement signal during a subsequent second measurement duration. A first sensor characteristic value is determined based on the first and second maximum values. | 10-17-2013 |
20130269320 | ACTIVE DIESEL PARTICULATE FILTER REGENERATION SYSTEM USING NON-WORK LOAD AND METHOD THEREOF - The present disclosure relates to an active diesel particulate filter (DPF) regeneration system of an engine, and more particularly, to an active DPF regeneration system and method, in which a non-work load is arbitrarily provided to the engine to quickly perform an active DPF regeneration even in a state where substantial work of a construction machine is stopped. | 10-17-2013 |
20130269321 | EXHAUST PURIFICATION SYSTEM AND METHOD FOR CONTROLLING EXHAUST PURIFICATION SYSTEM - Provided is an exhaust purification system capable of clearing a blockage of a reducing agent injection valve caused by solidification of an aqueous urea solution soon after starting an engine and preventing degradation in exhaust purification efficiency when starting an internal combustion engine. An exhaust purification system with a DPF, a reducing agent injection valve, and an SCR catalyst in order from the exhaust upstream side includes: an operation state detecting unit capable of detecting starting and stopping of the internal combustion engine; a forced regeneration control unit which performs forced regeneration of the DPF; a condition establishment determining unit which determines whether there is a possibility of solidification of the aqueous urea solution when the operation state detecting unit detects that the internal combustion engine is stopped; a data storage unit which stores the determination result of the condition establishment determining unit as data; and a blockage-clearing control unit which controls a temperature raising unit for raising the temperature of the reducing agent injection valve so as to raise the temperature of the reducing agent injection valve based on the data when starting the internal combustion engine. | 10-17-2013 |
20130276428 | EXHAUST DIAGNOSTIC CONTROL SYSTEM AND METHOD WITH NH3 DEPLETION CLEANSING - An exhaust diagnostic control system comprises a test enabling module, an exhaust gas temperature management module, and an exhaust diagnostic control system. The test enabling module is configured for executing a process for depleting a reductant load and subsequently establishing a known concentration of reductant on an after-treatment component following an occurrence of one or more trigger events. The exhaust gas temperature management module is configured for selectively adjusting a temperature of the after-treatment component to a predetermined temperature range using intrusive exhaust gas temperature management. The component management module is configured for executing a NOx reduction efficiency test following completion of the process for depleting a reductant load and subsequently establishing a known concentration of reductant on the after-treatment component. The NOx reduction efficiency test comprises determining a NOx reduction efficiency associated with the after-treatment component. | 10-24-2013 |
20130276429 | METHOD FOR DIAGNOSING A METERING VALVE AND DEVICE FOR CARRYING OUT THE METHOD - A method for diagnosing a metering valve for metering a reagent into the exhaust gas region of an internal combustion engine. The metering valve is actuated by a pulse-width-modulated metering valve actuation signal with a certain duty factor for setting the metering rate. A reagent pump places the reagent at a reagent pressure, and the reagent pump is operated with a pulse-width-modulated pump actuation signal with a certain duty factor. Diagnosis of the metering valve is carried out on the basis of an evaluation of the increase in the metering valve actuation signal pulse duty factor after a predefined increase in the metering rate. The reagent filling level of an SCR catalytic converter arranged in the exhaust gas region is taken into account. At the start of the diagnosis, the reagent storage capacity of the SCR catalytic converter is checked. | 10-24-2013 |
20130276430 | PUMPING DEVICE FOR SUPPLYING AN EXHAUST GAS AFTERTREATMENT SYSTEM OF AN INTERNAL COMBUSTION ENGINE WITH A REDUCTANT, AND METHOD - The invention relates to a pumping device ( | 10-24-2013 |
20130283766 | ENGINE UTILIZING A PLURALITY OF CONTROL VALVES, AND A RELATED METHOD THEREOF - In accordance with the embodiments of the present invention, an engine is disclosed. The engine includes at least one donor cylinder and at least one non-donor cylinder coupled to an intake manifold feeding intake air and an exhaust manifold. The exhaust manifold is configured to carry an engine exhaust emission from the donor cylinder and the non-donor cylinder. The engine also includes an exhaust gas recirculation manifold extending from the donor cylinder to the intake manifold for recirculating a donor cylinder exhaust emission from the donor cylinder to the donor, and non-donor cylinders via the intake manifold. The engine further includes an after-treatment system and a sensor configured to sense a temperature of the engine exhaust emission and a device configured to receive a sensing signal from the sensor and to control a parameter of the engine and a component of the engine in response to the sensing signal. | 10-31-2013 |
20130283767 | OXIDATION CATALYST MONITORING - A control method for monitoring an oxidation catalyst of an exhaust system is provided. The control method includes determining an open loop factor based on an aging factor and an efficiency curve; controlling an injection of hydrocarbons into an exhaust stream based on the open loop factor; and monitoring the oxidation catalyst based on the injection of hydrocarbons. | 10-31-2013 |
20130283768 | CLEAN EXHAUST SYSTEM AND METHOD FOR DIESEL ENGINES OF MARINE VESSELS - An emission control system (ECS) and associated method for facilitating the emulsification and/or dispersion of hydrocarbon, diesel particulate matter (DPM) and other pollutants from the exhaust gas output from a diesel engine of a marine vessel, includes a pump, a control system that controls the pump, and a product container containing an environmentally approved dispersing product. The ECS injects dispersing product into the engine's water cooling and exhaust system, for example, into the cooling water downstream of the engine and upstream of the spray ring or mixing elbow of the exhaust system. The environmentally approved dispersing product is drawn from the product container via the pump and injected at a controlled rate into the raw cooling water, and the dispersing product/cooling water mixture admixes with the exhaust gas resulting in emulsification and/or dispersion of the hydrocarbon, DPM and other pollutants present in the exhaust gas. | 10-31-2013 |
20130283769 | EXHAUST GAS PURIFICATION SYSTEM AND METHOD FOR CONTROLLING THE SAME - [Problem] To provide an exhaust gas purification system capable of preventing clogging of a reducing agent injection valve due to solidified urea aqueous solution to prevent decrease in the exhaust gas purification efficiency of an internal-combustion engine. | 10-31-2013 |
20130291515 | Engine Off Particulate Filter ("PF") Regeneration Using a Plurality of Secondary Energy Storage Devices - An exhaust gas treatment system for an internal combustion engine is provided. The internal combustion engine has an engine off condition. The exhaust gas treatment system includes particulate filter (“PF”) device in fluid communication with an exhaust gas conduit, an electric heater, a primary energy storage device, a plurality of secondary energy storage devices, and a control module. The PF device has a filter structure for removal of particulates in the exhaust gas, and is selectively regenerated based on an amount of particulates trapped within the filter structure of the PF device. The electric heater is disposed upstream of the filter structure and is selectively energized to provide heat for regeneration of the PF device. The plurality of secondary energy storage devices are selectively connected to the primary energy storage device. The secondary energy storage devices selectively energize the electric heater. | 11-07-2013 |
20130291516 | SYSTEM AND METHOD FOR CONTROLLING EXHAUST REGENERATION - A system for controlling regeneration in an after-treatment component comprises a feedback module, an error module, a gain module, and a regeneration control module. The feedback module is configured for determining a rate of change of the value of a controlled parameter. The error module is in communication with the feedback module and is configured for determining a value of an error term by subtracting a value of a target parameter from the value of the controlled parameter. The gain module is configured for determining a value of a proportional gain factor by raising a mathematical constant “e” to the negative power of the value of a tuned gain exponent and for determining a value of a derivative gain factor by multiplying the value of the proportional gain factor by a tuning factor. The regeneration control module is configured for determining a value of a rational control increment. | 11-07-2013 |
20130291517 | EXHAUST DIAGNOSTIC CONTROL SYSTEM AND METHOD WITH SELECTIVE DISABLEMENT OF NOX REDUCTION EFFICIENCY DIAGNOSTIC - An exhaust diagnostic control system comprises a test enabling module, an exhaust gas temperature management module in communication with the test enabling module, and a component management module configured for executing a test for determining a reduction efficiency associated with the after-treatment component. The test enabling module is configured for assessing a reliability of an estimated level of reductant load on an after-treatment component, and, based on the reliability, selectively facilitating disablement of a subsequent test for determining an efficiency of NOx reduction in the after-treatment component. The exhaust gas temperature management module is configured for selectively adjusting a temperature of the after-treatment component to a predetermined temperature range using intrusive exhaust gas temperature management. The test for determining reduction efficiency comprises determining a NOx reduction efficiency of the after-treatment component. | 11-07-2013 |
20130291518 | EXHAUST SYSTEM HAVING A PRE-HEATER - An exhaust system for a machine is disclosed. The exhaust system may have a first conduit configured to receive a first portion of an exhaust flow from an engine. The exhaust system may further have a second conduit configured to receive a remaining portion of the exhaust flow from the engine. The exhaust system may also have a diffuser connected at downstream ends of the first and the second conduits. In addition, the exhaust system may have an after-treatment component fluidly connected downstream of the diffuser. The exhaust system may also have a pre-heater configured to heat exhaust in the second conduit. | 11-07-2013 |
20130291519 | EXHAUST SYSTEM HAVING MULTIPLE DOSERS - An exhaust system for a machine is disclosed. The exhaust system may have a diffuser configured to receive exhaust from an engine. The exhaust system may further have a plurality of dosers associated with the diffuser and configured to inject fuel into the diffuser. The exhaust system may also have a controller configured to selectively control an amount of fuel injected by each of the plurality of dosers based on a velocity of the exhaust adjacent to each doser. In addition, the exhaust system may have an after-treatment component fluidly connected downstream of the diffuser and configured to heat the exhaust by oxidizing the injected fuel. | 11-07-2013 |
20130291520 | METHOD OF ESTIMATING A VARIATION OF A QUANTITY OF SOOT ACCUMULATED IN A DIESEL PARTICULATE FILTER - A method of estimating a variation of a quantity of soot accumulated in a diesel particulate filter coupled to an internal combustion engine is provided. The method includes a passive-regeneration check for checking whether a passive regeneration of the diesel particulate filter is occurring and, if this check yields that a passive regeneration is actually occurring, the method includes determining an initial quantity of soot that was accumulated in the diesel particulate filter when the passive regeneration began and determining a rough variation of the quantity of soot accumulated in the diesel particulate filter. An engine speed and an engine load are determined and, using the engine speed, the engine load, and the initial quantity of soot, a correction is determined. The variation of the quantity of soot accumulated in the diesel particulate filter is calculated as a function of the rough variation and the correction. | 11-07-2013 |
20130298526 | ADAPTIVE REGENERATION OF AN EXHAUST AFTERTREATMENT DEVICE IN RESPONSE TO A BIODIESEL FUEL BLEND - A compression-ignition engine is coupled to an exhaust aftertreatment system including a particulate filter. A method of operating the compression-ignition engine includes executing a feed-forward control scheme to determine an amount of post-combustion fuel to achieve a preferred temperature in the exhaust gas feedstream at an inlet to the particulate filter. The amount of post-combustion fuel is a nominal post-combustion fuel amount adjusted for a biodiesel blend ratio of the fuel. The post-combustion fuel is injected upstream of the exhaust aftertreatment system in response to a command to regenerate the particulate filter. | 11-14-2013 |
20130298527 | EXHAUST AFTERTREATMENT SYSTEM WITH DIAGNOSTIC DELAY - An apparatus and method of controlling a vehicle aftertreatment system is provided. The aftertreatment system treats exhaust gas produced by the vehicle engine and includes a particulate filter, and a NOx reducing device such as a selective catalytic reduction (SCR) device. The particulate filter is configured to regenerate to remove accumulated particles when the exhaust gas is heated above a regeneration temperature. A diagnostic device is included for monitoring the aftertreatment system. The diagnostic device may be a sensor for measuring the oxides of nitrogen (NOx) and/or an SCR efficiency monitor. A controller is employed to optimize the function of the diagnostic device. The controller does not enable the diagnostic device when the vehicle is powered until one or more entry conditions are satisfied. | 11-14-2013 |
20130298528 | CLOSED LOOP TEMPERATURE CONTROL IN THE SCR WARM UP MODE TO REDUCE EMISSION VARIATION - An exhaust aftertreatment system for a diesel engine includes a selective catalytic reduction (SCR) device and a diesel oxidation catalyst upstream of the SCR device. A method for warming-up the SCR device includes monitoring a plurality of combustion input parameters during an SCR warm-up strategy, monitoring a first temperature and a second temperature within the aftertreatment system, providing a feedback adjustment term as a function of a deviation in the first temperature from a desired temperature only when the monitored first and second temperatures are within a predetermined adjustment range, and initiating an adjusted SCR warm-up strategy based on the feedback adjustment term to converge the first temperature toward the desired temperature. | 11-14-2013 |
20130298529 | SYSTEM AMD METHOD FOR CONTROLLING AN AFTER-TREATMENT COMPONENT OF A COMPRESSION-IGNITION ENGINE - A method for controlling regeneration within an after-treatment component of an engine includes receiving a signal that is responsive to a change in pressure across an after-treatment component and calculating an estimate of accumulated particulate matter in the after-treatment component using a soot accumulation model calibrated to simulate operation of the engine at a reference condition. A soot model correction factor is based at least in part on an environmental temperature correction and is applied to the estimate of accumulated particulate matter in the after-treatment component to produce a temperature-compensated estimate of accumulated particulate matter in the after-treatment component. The temperature-compensated estimate of accumulated particulate matter in the after-treatment component is compared to a predetermined threshold associated with the after-treatment component, and a remedial action is initiated when the temperature-compensated estimate of accumulated particulate matter in the after-treatment component exceeds the predetermined threshold. | 11-14-2013 |
20130298530 | REGENERATION ASSIST CALIBRATION - A power system comprising an engine that produces exhaust, a fuel system that injects a fuel into the engine, an aftertreatment system that treats the exhaust, and is controller. The aftertreatment system includes an oxidation catalyst that converts NO from the engine into NO2, a particulate filter that traps soot from the engine, and a sensor that provides an indication of the amount of soot in the particulate filter. The controller increases an engine fuel injection pressure when the amount of soot in the particulate filter is above a threshold. | 11-14-2013 |
20130298531 | DEPOSITION PREVENTION METHOD AND TURBOCHARGER - The present invention is a deposition prevention method of coking deposits using a turbocharger ( | 11-14-2013 |
20130298532 | REVERSIBLE SOLID ADSORPTION METHOD AND SYSTEM UTILIZING WASTE HEAT FOR ON-BOARD RECOVERY AND STORAGE OF CO2 FROM MOTOR VEHICLE INTERNAL COMBUSTION ENGINE EXHAUST GASES - A method and system are described for on-board treatment of an exhaust stream containing CO | 11-14-2013 |
20130305690 | EXHAUST SYSTEM, MOTOR VEHICLE HAVING AN EXHAUST SYSTEM AND METHOD FOR OPERATING A MOTOR VEHICLE - An exhaust system includes at least one exhaust gas purification component, at least one exhaust line, at least one connecting device for connecting the exhaust system to an internal combustion engine of a motor vehicle and at least one fastening element for additionally fastening the exhaust system to the motor vehicle. The purification component can oscillate at a first resonance frequency range of less than 150 Hz in a fastened state. The purification component can oscillate due to vibrations of the engine at least when the engine is started or switched off. This, in particular, allows ash residues to be removed from a purification component during starting of the motor vehicle, so that maintenance expense for the purification component is reduced and effective operation thereof is possible over the long term. A motor vehicle having an exhaust system and a method for operating the motor vehicle are also provided. | 11-21-2013 |
20130305691 | METHOD FOR OPERATING AN EXHAUST GAS SYSTEM, METHOD FOR OPERATING A MOTOR VEHICLE AND MOTOR VEHICLE HAVING THE SYSTEM - A method for operating an exhaust gas system of an internal combustion engine having at least one adsorber for the adsorption of hydrocarbons, a catalytic converter disposed downstream of the adsorber for converting hydrocarbons and at least one heating device disposed between the adsorber and the catalytic converter, includes adapting operation of the heating device in dependence on a state of aging of the catalytic converter. A method for operating a motor vehicle and a motor vehicle having the system are also provided. | 11-21-2013 |
20130305692 | VEHICLE AND METHOD FOR CONTROLLING CATALYST DEVICE IN TEMPERATURE - A vehicle includes: an engine; an EHC (electrically heated catalyst) electrically heated for purifying exhaust gas of the engine; a temperature sensor for sensing the temperature of the EHC; and an ECU that controls the EHC in temperature. The ECU performs a first estimation process and a second estimation process to estimate the temperature of the EHC and accordingly controls electric power applied to energize the EHC, the first estimation process being performed to estimate the temperature of the EHC based on an output of the temperature sensor before the engine starts, the second estimation process being performed to estimate the temperature of the EHC based on the temperature of the exhaust gas emitted by the engine after the engine is started. | 11-21-2013 |
20130312388 | DUAL AIR CIRCUIT FOR EXHAUST GAS TREATMENT - An exhaust treatment system for an engine includes a regeneration device being in receipt of exhaust from the engine and positioned upstream of a diesel particulate filter. A compressor provides a source of compressed air. An air/fuel nozzle is coupled to the regeneration device, in receipt of a fuel supply as well as the compressed air. The fuel and compressed air are forced through an orifice of the nozzle to atomize the fuel. A bypass line provides compressed air from the compressor to the regeneration device without passing through the orifice of the nozzle. A valve is operable to allow compressed air to flow through the bypass line when a predetermined condition exists. | 11-28-2013 |
20130312389 | METHOD AND APPARATUS FOR MONITORING A PARTICULATE FILTER - An internal combustion engine includes a particulate filter that is configured to treat exhaust gas. A method for monitoring the particulate filter includes employing a soot sensor to monitor the exhaust gas downstream of the particulate filter. A fault is detected in the particulate filter when accumulated soot mass indicated by the soot sensor exceeds a soot mass threshold over a course of engine operation between a first regeneration event and a second regeneration event of the particulate filter. A control module associated with operation of the internal combustion engine is notified of the fault. | 11-28-2013 |
20130312390 | METHOD TO CONTROL AND DIAGNOSE AN EXHAUST GAS HEAT EXCHANGER - A method for controlling an engine having an exhaust gas heat exchanger includes measuring air mass flow, engine coolant temperature (ECT), exhaust gas temperature (EGT), heat exchanger coolant temperature (HECT), and engine speed; and operating a valve to selectively provide exhaust gas flow through the exhaust gas heat exchanger based on air mass flow, ECT, EGT, HECT, and engine speed. A vehicle has an engine and an exhaust heat recovery system with an exhaust gas heat exchanger and a valve configured to control exhaust gas flow. A controller for the vehicle is configured to (i) measure air mass flow, ECT, EGT, HECT, and engine speed, and (ii) operate the valve to selectively provide exhaust gas flow through the exhaust gas heat exchanger based on air mass flow, ECT, EGT, HECT, and engine speed. | 11-28-2013 |
20130312391 | EXHAUST AIR INJECTION - Embodiments for controlling exhaust oxygen concentration are provided. In one example, an engine method comprises operating the engine with lean combustion, and when exhaust oxygen concentration is below a threshold, injecting air into an exhaust passage between a first emission control device and an SCR device. In this way, excess emissions may be converted while operating with lean combustion. | 11-28-2013 |
20130312392 | SYSTEMS AND METHODS TO MITIGATE NOX AND HC EMISSIONS AT LOW EXHAUST TEMPERATURES - Systems and methods are provided for managing low temperature NO | 11-28-2013 |
20130318947 | SYSTEM AND METHOD FOR TREATMENT OF GASES WITH REDUCING AGENTS GENERATED USING STEAM REFORMING OF DIESEL FUEL - Systems and methods for treatment of a heated exhaust gas including hydrocarbons are provided. A method includes providing a first gas including a gaseous mixture of vaporized diesel fuel and steam and treating the first gas using at least one corona discharge including a combination of streamers to transform the first gas into a second gas including volatile partially oxidized hydrocarbons (PO—HC) and hydrogen gas (H | 12-05-2013 |
20130327017 | Exhaust System, Operating Method And Control Strategy In Internal Combustion Engine - An exhaust system for an internal combustion engine includes an exhaust filter positioned within an exhaust conduit, and having a first and a second NOx sensing mechanism positioned upstream and downstream the exhaust filter. An electronic control unit is coupled with the NOx sensing mechanisms and generates a signal indicative of a soot loading state of the exhaust filter responsive to a difference in species composition of the sensed NOx upstream and downstream the exhaust filter. Related methodology and control strategy are also disclosed. | 12-12-2013 |
20130327018 | METHOD OF MONITORING A DIFFERENTIAL PRESSURE SENSOR OF AN EXHAUST GAS TREATMENT SYSTEM - A method of monitoring a differential pressure sensor of an exhaust gas aftertreatment system includes sensing a learned value (n−1, n, n+1, n+2, etc.) of the differential pressure sensor for each after-run occurrence of the vehicle, and calculating an absolute value of a rate of change between a current (n) learned value of the differential pressure sensor and a previous (n−1) learned value of the differential pressure sensor. The absolute value of the rate of change is compared to a threshold pressure value to determine if the absolute value of the rate of change is greater than the threshold pressure value or is less than the threshold pressure value. A fault in the differential pressure sensor is signaled when the absolute value of the rate of change of the learned values is greater than the threshold pressure value. | 12-12-2013 |
20130327019 | Particulate Oxidation Catalyst With Dual Pressure-Drop Sensors - A method and system for treating exhaust emitted via an exhaust line from a diesel engine. A POC system is installed on the exhaust line, and has at least one diesel oxidation catalyst (DOC), a set of two or more particulate oxidation catalyst (POC) elements, a first differential pressure sensor (ΔP1) to measure the pressure difference across the first and all but the last POC elements, and a second differential pressure sensor (ΔP2) to measure pressure differences across the last POC element. During operation of the engine, ΔP1 is monitored to determine whether its POC elements require active regeneration, and ΔP2 is separately monitored to determine whether its (the last) POC element requires active regeneration. | 12-12-2013 |
20130327020 | AMMONIA GENERATING DEVICE - An ammonia generating device is used for the treatment of exhaust gases of internal combustion engines, particularly for motor vehicles. The device includes a tank having a body capable of releasing ammonia by desorption. The device is also provided with a first single connection member comprising an electrical connection to supply the device with electricity and a fluid connection to allow evacuation of the ammonia produced following the desorption reaction. | 12-12-2013 |
20130327021 | DEVICE FOR GENERATING AMMONIA - An ammonia generating device is delimited by an outer casing that includes a main reservoir and a secondary reservoir. The main reservoir is capable of reloading with ammonia the body in the secondary reservoir. A heater is capable of heating the bodies in each reservoir. A connector connects the main reservoir to the secondary reservoir. The heater comprises first and second heating devices respectively installed inside the main reservoir and the secondary reservoir and operating independently. The main reservoir is thermally decoupled from the secondary reservoir to generate a temperature gradient between both reservoirs. | 12-12-2013 |
20130327022 | DEVICE FOR GENERATING AMMONIA - An ammonia generating device for treating exhaust gases of internal combustion engines, notably of automobile vehicles, includes a reservoir having a body capable of releasing ammonia by desorption and a heating device positioned inside the reservoir to heat the body in the reservoir. The heating device comprises a heat generating element that has an elongated form. The heating device further includes at least one heat transfer feature laid out along an axial direction of the heat generating element and extending in a direction radial to the heat generating element. | 12-12-2013 |
20130327023 | EXHAUST GAS SYSTEM AND METHOD FOR OPERATING SUCH A SYSTEM - The invention relative to an exhaust gas system ( | 12-12-2013 |
20130327024 | DIRECT DENSIFICATION METHOD AND SYSTEM UTILIZING WASTE HEAT FOR ON-BOARD RECOVERY AND STORAGE OF CO2 FROM MOTOR VEHICLE INTERNAL COMBUSTION ENGINE EXHAUST GASES - A method and system are described for on-board treatment of an exhaust stream containing CO | 12-12-2013 |
20130327025 | COMBUSTION EXHAUST GAS TREATMENT SYSTEM AND METHOD OF TREATING COMBUSTION EXHAUST GAS - A combustion exhaust gas treatment system comprising: a heat exchanger (A) for recovering heat contained in the combustion exhaust gas into heat medium, an absorption column for obtaining CO | 12-12-2013 |
20130333351 | FILTER REGENERATION USING FILTER TEMPERATURE MODULATION - According to one embodiment, an apparatus for controlling the regeneration of a particulate filter of an internal combustion engine system includes an operating conditions module that is configured to monitor at least one engine system condition. The apparatus also includes a regeneration module that is configured to trigger a regeneration event if the at least one engine system condition meets a threshold. Further, the apparatus includes a thermal management module that is configured to operate the internal combustion engine system in a thermal management mode for a first time period while a regeneration event is triggered by the regeneration module. Also, the apparatus includes a high NO | 12-19-2013 |
20130333352 | Flow Distributor For Engine Exhaust Aftertreatment Component - An engine exhaust aftertreatment component includes a housing defining an exhaust flow from an exhaust inlet to an exhaust outlet. An exhaust aftertreatment substrate is positioned within the housing between the exhaust inlet and the exhaust outlet and has an upstream face, which includes an inner region surrounded by an outer region. A flow distributor is positioned in the housing upstream from the exhaust aftertreatment substrate and divides the exhaust flow into a first portion directed toward the inner region through a first set of perforations and a second portion directed toward the outer region serially through a second set of perforations and a third set of perforations. | 12-19-2013 |
20130333353 | CONTROL OF AFTERTREATMENT REGENERATION IN A HYBRID POWERED VEHICLE - A method for controlling aftertreatment regeneration for a system having a hybrid powertrain is described. The method includes determining that an engine aftertreatment regeneration is indicated when a regeneration request index exceeds a first threshold. The method includes determining an acceptable battery usage amount based on a current battery state of charge (SOC) and a minimum battery SOC. The method further includes determining a battery usage amount for an engine aftertreatment regeneration operation. The method includes initiating an engine aftertreatment regeneration when the battery usage amount is less than or equal to the acceptable battery usage amount. | 12-19-2013 |
20130333354 | MEMBRANE SEPARATION METHOD AND SYSTEM UTILIZING WASTE HEAT FOR ON-BOARD RECOVERY AND STORAGE OF CO2 FROM MOTOR VEHICLE INTERNAL COMBUSTION ENGINE EXHAUST GASES - A method and system are described for on-board treatment of an exhaust stream containing CO | 12-19-2013 |
20130333355 | SYSTEM AND METHOD FOR ACTIVE REVENERATION OF A DPF OF A CONSTRUCTION MACHINE HAVING AN ELECTRO-HYDRAULIC PUMP - An exemplary embodiment of the present disclosure relates to a system for active regeneration of a DPF of a diesel engine, and more particularly, to a system and a method for active regeneration of a DPF including an electro-hydraulic pump, in which a non-work load is arbitrarily provided to the diesel engine to quickly perform active regeneration of the DPF even in a state in which substantial work of the construction machine having an electro-hydraulic pump is stopped, and to this end, provides a system and a method for active regeneration of a DPF of a construction machine in that, when performing the active regeneration of the DPF, a center bypass cut valve is driven to convert a hydraulic system of the construction machine to an open state, a predetermined flow rate of working fluid is discharged from the electro-hydraulic pump using an adjustor such as an electromagnetic proportional control valve (EPPR), and the working fluid is collected in to a tank through an opened center bypass line, thus allowing the working fluid to flow without driving a working machine to produce a so-called non-work load, and the engine is overheated by the load, and the temperature of the exhaust gas is raised to a predetermined temperature so as to satisfy a temperature condition required for the active regeneration of the DPF. | 12-19-2013 |
20130340408 | TECHNIQUE TO DIAGNOSE AND CONTROL AMMONIA GENERATION FROM A TWC FOR PASSIVE AMMONIA SCR OPERATION - A method for controlling ammonia generation in an exhaust gas feedstream output from an internal combustion engine equipped with an exhaust aftertreatment system having a first aftertreatment device includes executing an ammonia generation cycle to generate ammonia on the first aftertreatment device. The ammonia generation cycle includes monitoring an air-fuel ratio in the exhaust gas feedstream at a first location in the exhaust aftertreatment system, and monitoring an air-fuel ratio in the exhaust gas feedstream at a second location in the exhaust aftertreatment system. The air-fuel ratio at the first location is compared to the air-fuel ratio at the second location. If the air-fuel ratio at the second location is richer than the air-fuel ratio at the first location, operation of the engine is adjusted until the air-fuel ratio at the second location is equal to the air-fuel ratio at the first location. | 12-26-2013 |
20130340409 | METHOD FOR HEATING A DELIVERY SYSTEM AND MOTOR VEHICLE HAVING A DELIVERY SYSTEM - A method for heating a delivery system providing reducing agent to an exhaust gas treatment device of an internal combustion engine having electrical components, includes determining a temperature in the delivery system, determining thermal energy required for error-free operation of the delivery system in a time interval, and introducing the required thermal energy into the delivery system by operating the electrical components within the time interval. The electrical components are activated at a time offset of at least 30 seconds. The required energy is determined so that the quantity of reducing agent to be delivered hourly is provided in liquid form at least four times after the time interval. The method prevents overloading of an electrical system of a motor vehicle when heating the delivery system and prevents ice cavity formation in a reducing agent in a tank. A motor vehicle having a delivery system is also provided. | 12-26-2013 |
20140000239 | METHOD AND APPARATUS TO CONTROL REGENERATION OF A PARTICULATE FILTER | 01-02-2014 |
20140000240 | PROCESS FOR THE REDUCTION OF NITROGEN OXIDES AND SULPHUR OXIDES IN THE EXHAUST GAS FROM INTERNAL COMBUSTION ENGINE | 01-02-2014 |
20140000241 | Method for feeding thermal energy into an exhaust emission control unit connected in the exhaust gas system of an internal combustion engine | 01-02-2014 |
20140000242 | METHODS AND SYSTEMS FOR EMISSION SYSTEM CONTROL | 01-02-2014 |
20140007558 | Reducing Agent Injection Nozzle - The invention relates to an injection nozzle ( | 01-09-2014 |
20140013725 | KINETICS-BASED SCR CONTROL MODEL IMPROVEMENT - A method for monitoring a discrete substrate element from an ammonia-selective catalyst reduction device configured to treat an exhaust gas feedstream of an internal combustion engine includes monitoring amounts of ammonia that are adsorbed, desorbed, and oxidized and an amount of ammonia that is consumed in reducing NOx in the exhaust gas feedstream from the discrete substrate element. An amount of ammonia consumption for the discrete substrate element is determined based on the amount of ammonia that is oxidized and the amount of ammonia that is consumed in reducing NOx in the exhaust gas feedstream. The amount of ammonia that is adsorbed and the amount of ammonia that is desorbed for the discrete substrate element are compared and the amount of ammonia consumption for the discrete substrate element is adjusted when the amount of ammonia that is adsorbed is less than the amount of ammonia that is desorbed. | 01-16-2014 |
20140013726 | AMMONIA STORAGE CONTROL - Various methods for controlling ammonia levels stored in a catalyst by controlling exhaust gas temperatures are provided. In one embodiment, a temperature of a catalyst in an internal combustion engine is determined. If the temperature of the catalyst exceeds a first threshold at which an ammonia capacity of the catalyst for the temperature is below a current stored ammonia level in the catalyst, a load of the engine is reduced including adjusting a torque output of a motor operatively coupled to the engine. | 01-16-2014 |
20140013727 | METHOD FOR ENRICHING THE EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE WITH REDUCING AGENT AND INTERNAL COMBUSTION ENGINE FOR PERFORMING SUCH A METHOD - A method for enriching the exhaust gas of an internal combustion engine with a reducing agent is provided, the internal combustion engine including at least one cylinder and having an intake system for admission of charge air, an exhaust gas discharge system for discharging exhaust gases, and at least one exhaust gas aftertreatment system for reducing nitrogen oxides arranged in the exhaust gas discharge system and which is periodically provided with a supply of reducing agent. The method comprises enriching the exhaust gas with the reducing agent in the exhaust gas discharge system upstream of at least the one exhaust gas aftertreatment system when a fuel supply of the at least one cylinder of the internal combustion engine is deactivated due to an absence of load demand. | 01-16-2014 |
20140013728 | FLUID COOLED INJECTOR AND EXHAUST AFTERTREATMENT SYSTEM, VEHICLE, AND METHOD USING A FLUID COOLED INJECTOR - A fluid cooled injector includes an injector body comprising an injector tip and a cooling channel, the injector tip comprising an injector orifice, and a heat conducting shield, the heat conducting shield comprising a heat conducting shield orifice arranged coaxially with the injector orifice, the heat conducting shield being in direct contact with at least one of the injector body and the injector tip. An exhaust after treatment system and a vehicle including such an injector, and a method involving the use of such an injector, are also disclosed. | 01-16-2014 |
20140020362 | METHOD AND APPARATUS TO RECOVER EXHAUST GAS RECIRCULATION COOLERS - An apparatus for mitigating fouling within a heat exchanger device includes an internal combustion engine and an external exhaust gas recirculation (EGR) circuit. The internal combustion engine is fluidly coupled to an intake gas manifold upstream of the engine and an exhaust gas manifold downstream of the engine. The EGR circuit is fluidly coupled to the exhaust gas manifold at a first end and is configured to selectively route back exhaust gas flow as EGR flow into the intake gas manifold at a second end. The EGR circuit includes the heat exchanger device for cooling the EGR flow prior to entering the intake manifold and a surface deposit removing device configured to remove surface deposit build-up from within the heat exchanger device when the surface deposit removing device is activated. | 01-23-2014 |
20140020363 | CONTROL APPARATUS AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - An engine ECU diagnoses the presence or absence of abnormality during execution of the fuel cut. The engine ECU is configured to restrict the fuel cut according to the temperature of a catalyst when the temperature is higher than a fuel-cut-restriction temperature of the catalyst. The engine ECU is configured to set the fuel-cut-restriction temperature is lower when the diagnosis has been completed than when the diagnosis has not been completed. Furthermore, the engine ECU continues the fuel cut if the diagnosis is completed during execution of the fuel cut while the temperature of the catalyst is between the fuel-cut-restriction temperature set prior to the completion of the diagnosis and the fuel-cut-restriction temperature set after the completion of the diagnosis. | 01-23-2014 |
20140020364 | METHOD FOR REDUCING NITROGEN OXIDE LEVELS IN DIESEL ENGINE EXHAUST GASES - A method is described for reducing the nitrogen oxide levels in diesel engine exhaust gases with the aid of an exhaust gas treatment system, which includes a device for feeding ammonia and/or a compound decomposing to form ammonia, and two SCR units. An ammonia sensor is situated between the first and second SCR unit. A nitrogen oxide sensor is located in the exhaust pipe downstream from the second SCR unit. The signals of the ammonia sensor and the NO | 01-23-2014 |
20140020365 | Method for Removing Nitrogen Oxides from Combustion Fumes with On-Site Generation of Ammonia - A method for the control of nitrogen oxides content in the combustion fumes of a thermal power plant is disclosed; the method comprises the on-site production of ammonia by the steps of: electrolysis of water as a source of hydrogen; separation of air as a source of nitrogen, formation of a make-up gas and synthesis of ammonia in a suitable synthesis loop; said on-site produced ammonia, or a solution thereof, is used for a process of reduction of nitrogen oxides in the combustion fumes. | 01-23-2014 |
20140020366 | Method of Recycling Exhaust Emissions - An emissions recycling system is used on a vehicle towing an agricultural implement to enrich the fertility of the soil. The system includes an exhaust collector for collecting exhaust emissions from the internal combustion engine of the towing vehicle and an exhaust distribution system for injecting at least a portion of the exhaust emissions collected by the exhaust collector into the ground worked by the ground working tools of the agricultural implement. Fertility of the soil is enriched by bioactivity within the soil's micro flora which consumes the greenhouse gas and emissions. | 01-23-2014 |
20140026541 | EXHAUST SYSTEM - A power system includes a dual fuel engine, a first fuel source configured to provide a first fuel to the engine, and a second fuel source configured to provide a second fuel to the engine different than the first fuel. The power system also includes an exhaust system configured to receive combustion exhaust from the engine. The exhaust system includes a reduction catalyst comprising palladium catalyst material and an oxidation catalyst comprising cobalt catalyst material. Additionally, changing a ratio of the first fuel provided to the engine relative to the second fuel changes a NOx conversion efficiency of the reduction catalyst. | 01-30-2014 |
20140026542 | EXHAUST GAS RECEIVER, INTERNAL COMBUSTION ENGINE AND METHOD FOR SELECTIVE CATALYTIC REDUCTION - An exhaust gas receiver that is connectable to an internal combustion engine for receiving exhaust gases from the engine, the exhaust gas receiver comprising a receiver chamber, at least one exhaust inlet, at least one exhaust outlet, and a reducing agent duct, at least a portion of the reducing agent duct being arranged inside the receiver chamber for heating the reducing agent before the reducing agent is mixed with the exhaust gases. The invention also concerns an internal combustion engine and a method for selective catalytic reduction. | 01-30-2014 |
20140026543 | EXHAUST GAS CLEANING DEVICE FOR A WATERCRAFT, METHOD FOR OPERATING AN EXHAUST GAS CLEANING DEVICE AND WATERCRAFT - An exhaust gas cleaning device for a watercraft includes at least a particle filter and/or an SCR catalytic converter and a heat exchanger disposed upstream thereof. The heat exchanger is operated with seawater as a cooling medium. The heat exchanger has an exhaust gas inlet side and an exhaust gas outlet side and is suitable for reducing a volumetric flow rate of an exhaust gas between the exhaust gas inlet side and the exhaust gas outlet side by a certain value in a certain temperature range of the exhaust gas at the exhaust gas inlet side. A watercraft and a method for operating an exhaust gas cleaning device for a watercraft are also provided. | 01-30-2014 |
20140033678 | NOX-FLOWRATE AND TEMPERATURE CORRECTION DURING SOOT MASS ESTIMATION IN A VEHICLE EXHAUST AFTER-TREATMENT DEVICE - A method of correcting a soot mass estimate in a vehicle exhaust after-treatment device includes monitoring an exhaust gas pressure drop across a particulate filter included with the vehicle exhaust after-treatment device; determining an initial soot mass estimate from a monitored exhaust gas pressure drop; revising the initial soot mass estimate in view of a monitored engine speed, engine load, exhaust gas temperature, and NOx gas flow rate; and generating a particulate filter regeneration request if the revised soot mass estimate exceeds a threshold. | 02-06-2014 |
20140033679 | ACCUMULATED ASH CORRECTION DURING SOOT MASS ESTIMATION IN A VEHICLE EXHAUST AFTERTREATMENT DEVICE - A method of correcting a soot mass estimate in a vehicle exhaust aftertreatment device includes monitoring an exhaust gas pressure drop across a particulate filter included with the vehicle exhaust aftertreatment device. Following the detection of a pressure drop, a controller may determine a soot mass estimate from the monitored pressure drop; determine an ash volume estimate representative of an amount of ash within the particulate filter; determine an ash correction factor from the soot mass estimate and the ash volume estimate; and calculate a corrected soot mass value by multiplying the ash correction factor with the soot mass estimate. If the corrected soot mass value exceeds a threshold, the controller may generate a corresponding particulate filter regeneration request. | 02-06-2014 |
20140033680 | SYSTEM AND METHOD FOR MONITORING A PARTICULATE FILTER IN A VEHICLE EXHAUST AFTERTREATMENT DEVICE - A method of monitoring a particulate filter of an exhaust aftertreatment device includes sensing a first pressure drop across the particulate filter at a first instant in time, and sensing a second pressure drop across the particulate filter at a second instant in time. A controller may then calculate a rate-of-change of the pressure drop between the first instant in time and the second instant in time while sensing a flow rate of an exhaust gas flowing through the exhaust aftertreatment device. Using the sensed exhaust flow rate, the controller may determine a rate-of-change threshold, and subsequently compare the calculated rate-of-change to the rate-of-change threshold. The method further includes updating a soot model using the sensed second pressure drop if the calculated rate-of-change is less than the rate-of-change threshold. | 02-06-2014 |
20140033681 | Reducing Agent Metering System with Metering Chamber for Exact Setting of the Metered Amount - The invention relates to a reducing agent metering system for injection of a reducing agent into the exhaust gas flow of an internal combustion engine for selective catalytic reduction, with a delivery pump ( | 02-06-2014 |
20140033682 | METHOD FOR OPERATING AN SCR CATALYIC CONVERTER PROVIDED FOR THE AFTERTREATMENT OF EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE - In a method for operating an SCR catalytic converter provided for the reduction of NOx in exhaust gases of an internal combustion engine, which SCR catalytic converter is operated with a reagent which can be stored in the SCR catalytic converter such that there is a certain reagent fill level in the SCR catalytic converter, wherein the actual NOx concentration downstream of the SCR catalytic converter is monitored on the basis of the signal of a sensor, which is arranged downstream of the SCR catalytic converter and which is sensitive at least with respect to NOx, in comparison with a calculated NOx concentration downstream of the SCR catalytic converter, it is provided according to the invention that, in the case of a comparison result which represents a conversion deficit as a difference between the measured actual NOx concentration and the previous calculated reagent fill level in the SCR catalytic converter is corrected to a new calculated reagent fill level, whereby an immediate dosing of reagent takes place. | 02-06-2014 |
20140033683 | SYSTEM, METHOD, AND APPARATUS FOR AFTERTREATMENT SYSTEM MONITORING - A method includes determining whether a urea refill event is detected, and clearing a quality accumulator value and clearing a latching abort command. The method includes determining whether urea fluid quality check abort conditions are met, and clearing the urea quality accumulator, latching the abort command, and exiting the reductant fluid quality check. In response to the abort conditions not being met, incrementing the urea quality accumulator according to an amount of urea being injected, and comparing the accumulated urea quantity to a low test threshold. The method includes, in response to the accumulated urea quantity being greater than the low test threshold, comparing the accumulated urea quantity to a high test threshold, and in response to the urea quantity being greater than the high test threshold, determining whether the a NO | 02-06-2014 |
20140033684 | METHOD FOR OPERATING AN SCR DOSING UNIT AND MOTOR VEHICLE HAVING A DOSING UNIT - A method for operating a dosing unit for dosing reducing agent into an exhaust gas treatment device for purifying the exhaust gases of an internal combustion engine, includes providing the dosing unit with at least one delivery pump, at least one injector and a line section for conducting reducing agent from the delivery pump to the injector. The dosing unit is first operated for dosing reducing agent into the exhaust gas treatment device. Then, the dosing unit is shut off. Subsequently, a first pressure is maintained in the line section for at least a first time period, with the first pressure exceeding atmospheric pressure. A motor vehicle having the dosing unit is also provided. | 02-06-2014 |
20140041362 | METHOD AND SYSTEM FOR REGENERATING A PARTICULATE FILTER - An engine system and method for operating an engine that includes a particulate filter is described. In one example, spark delivery to one or more engine cylinders is ceased while fuel is continued to be injected to the one or more cylinders to improve particulate filter regeneration. The system and method may be particularly beneficial for direct injection turbocharged engines. | 02-13-2014 |
20140041363 | CATALYTIC REDUCTION OF NOx WITH HIGH ACTIVITY CATALYSTS WITH ACETALDEHYDE REDUCTANT - Methods and systems are provided for selective catalytic reduction of NOx with a low molecular low molecular weight aldehyde, e.g., acetaldehyde, as a reductant using a catalyst system including two catalysts. An exhaust stream containing an amount of NO from a combustion operation is provided. A portion of the exhaust stream is introduced to a first catalyst to convert the NO to NO | 02-13-2014 |
20140041364 | CATALYTIC REDUCTION OF NOx WITH HIGH ACTIVITY CATALYSTS WITH NH3 REDUCTANT - Methods and systems for selective catalytic reduction of NOx with an ammonia reductant and a zeolite catalyst loaded with at least two metals selected from the group of tungsten, cobalt, and vanadium. An exhaust stream including NOx and a reductant stream including ammonia are provided to a catalytic reactor having the metal loaded zeolite catalyst at suitable operating temperatures for NOx reduction of at least 90%. | 02-13-2014 |
20140041365 | CROSS-LINKABLE POLYOLEFIN COMPOSITION FOR FORMED TEXTURED SKIN APPLICATIONS - A fuel reforming system, process, and device including a catalytic chamber and a heating chamber. The catalytic chamber, further including a fluid fuel intake and a gaseous fluid exit port and at least one heat exchanger for distributing heat between the heating chamber and the catalytic chamber. The catalytic chamber further including a screen member having a surface, wherein the member includes a catalytic deposit made from a combination of platinum and rhodium alloy. A catalytic conversion of converting liquid fuel to gaseous fuel occurs within the catalytic chamber. Fuel exits the fuel reforming device through a gaseous fluid exit port. In the process of phase change from liquid to gaseous phase, there is no change of chemical composition and C8H18 remains stable throughout, except for an increase in Enthalpy (heat content) per mol. | 02-13-2014 |
20140041366 | CATALYTIC CONVERTER FOR THE SELECTIVE CATALYTIC REDUCTION OF NITROGEN OXIDES IN THE EXHAUST GAS OF DIESEL ENGINES - The present invention relates to a catalytic converter which comprises a molecular sieve and a mixed oxide, and to a method for the selective catalytic reduction of nitrogen oxides in exhaust gases of diesel engines. | 02-13-2014 |
20140041367 | Operating Method for a Motor Vehicle Diesel Engine Having an Exhaust Emission Control System - An operating method is provided for a motor vehicle diesel engine having an exhaust emission control system that includes a three-way catalytic converter and an SCR catalytic converter situated one behind the other in the flow direction of the exhaust gas. The diesel engine is operated, at least intermittently, with an air-fuel ratio of approximately λ=1.0 in a first operating range in which the SCR catalytic converter falls below a predefinable minimum temperature and with excess air that is typical for normal diesel engine operation in a second operating range in which the SCR catalytic converter exceeds the predefinable minimum temperature. An output signal of an exhaust gas sensor situated downstream from the three-way catalytic converter and which is correlated with a NOx concentration of the exhaust gas is used to set the air-fuel ratio in the first operating range. | 02-13-2014 |
20140041368 | HEATING OF AN EXHAUST GAS AFTERTREATMENT SYSTEM BY DRAGGING OF AN INTERNAL COMBUSTION ENGINE WITH THE AID OF AN ELECTRIC MOTOR - A method is introduced for heating an exhaust-gas aftertreatment system ( | 02-13-2014 |
20140047818 | Low Emission Power Generation Systems and Methods Incorporating Carbon Dioxide Separation - Methods and systems for CO | 02-20-2014 |
20140047819 | Emissions Treatment System with Ammonia-Generating and SCR Catalysts - Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines. | 02-20-2014 |
20140047820 | DEVICE AND METHOD FOR CONTROLLING UREA INJECTION SYSTEM OF DIESEL ENGINE - Disclosed are an apparatus and a method for controlling a urea injection system of a diesel engine. The apparatus ( | 02-20-2014 |
20140053534 | METHOD OF DETERMINING DOC REGENERATION CYCLE - Disclosed herein is a method of determining a DOC regeneration cycle of a vehicle, in which the DOC regeneration cycle is determined such that a rich fuel-air mixture is repeatedly and periodically applied to the DOC, and the regeneration of the DOC is accelerated, thereby improving the purification performance of the DOC. | 02-27-2014 |
20140053535 | METHOD FOR MONITORING A PRESSURE SENSOR IN A DELIVERY AND METERING SYSTEM FOR A REACTANT OF A CATALYTIC CONVERTER - A method is made available for monitoring a pressure sensor ( | 02-27-2014 |
20140053536 | DIESEL EMISSIONS CONTROL AFTER-TREATMENT SYSTEMS AND RELATED METHOD - A diesel emissions control system or diesel emissions control after- treatment (“DECAT”) system thermally stabilizes and catalyzes engine exhaust. The system generates substantial reduced volatile organic compounds (“VOCs”) and hydrocarbons (“HCs”), as well as selective catalytic reduction (“SCR”) of nitrogen oxides (“NOx”). The system treats exhaust gases rich in particulate matter (“PM”) prior to a downstream diesel particulate converter (“DPC”). The DPC agglomerates the PM into larger and heavier soot that may be more readily captured by a deep bed of composite wire mesh filters. The system includes a base metal catalyst with an iron-containing zeolite catalyst augmented with cerium-manganese oxide (the “IZCM Catalyst”). | 02-27-2014 |
20140060007 | APPARATUS AND METHOD FOR ONBOARD PERFORMANCE MONITORING OF OXIDATION CATALYST - An exhaust treatment system is disclosed that can diagnose the performance of an exhaust treatment oxidation catalyst in converting NO to NO | 03-06-2014 |
20140060008 | Method for Operating a Motor Vehicle Internal Combustion Engine with an Exhaust Particle Filter - A method for operating a motor vehicle internal combustion engine with an exhaust system branch in which a wall-flow exhaust particle filter is arranged. An amount of ash and an amount of soot accumulated in the exhaust particle filter are continuously determined. An ash increase value characterizing an increase in the amount of ash is determined and if pre-set conditions are present, the operation of the internal combustion engine is changed over to a special operating mode for performing an ash detachment and transportation operation, in which operating variables of the internal combustion engine are set such that, on the exhaust entry side in the exhaust particle filter, a pre-settable minimum exhaust flow speed results at which detachment of ash attached to the channel walls of the exhaust particle filter and transportation of detached ash in the direction of the respective inlet channel end is made possible. | 03-06-2014 |
20140060009 | SECONDARY AIR INTRODUCTION SYSTEM AND METHOD FOR SYSTEM OPERATION - A vehicle system operation method is provided. The method comprises, during a first operating condition, increasing back pressure in a first exhaust conduit positioned upstream of a turbine and downstream of a first emission control device and during a second operating condition, reducing back pressure in the first exhaust conduit and flowing boosted air from downstream of a compressor into a second exhaust conduit positioned upstream of a second emission control device and downstream of the turbine. | 03-06-2014 |
20140060010 | METHOD FOR THE REGENERATION OF A CARBON PARTICULATE FILTER - Method for the regeneration of a carbon particulate filter | 03-06-2014 |
20140060011 | METHOD, SYSTEM, AND DEVICE FOR DECONTAMINATING POLLUTED COMBUSTION GAS USING VOLCANIC ROCK - The present disclosure encompasses methods and systems for decontaminating polluted gas using heated volcanic rock. | 03-06-2014 |
20140069080 | CATALYST HEATING WITH EXHAUST BACK-PRESSURE - Embodiments for controlling an exhaust back-pressure valve are provided. In one example, a method for operating an engine comprises closing an exhaust back-pressure valve in response to a component temperature, and adjusting intake and/or exhaust valve operation in response to closing the exhaust back-pressure valve to reduce cylinder internal exhaust gas recirculation (EGR). In this way, combustion stability may be maintained while the exhaust back-pressure valve is closed. | 03-13-2014 |
20140069081 | DIFFERENTIAL PRESSURE-BASED ENABLEMENT OF A PARTICULATE FILTER DIAGNOSTIC - A vehicle includes an engine, an exhaust system having a particulate filter which removes soot from the exhaust stream, a sensor, and a controller. The sensor measures instantaneous differential pressure across the filter. The controller executes a method to selectively enable or disable execution of an efficiency diagnostic of the filter as a function of a learned differential pressure offset value. The controller may also compare the differential pressure to a calibrated threshold and execute a control action when the differential pressure falls within an allowable range of the threshold. This may include applying the differential pressure offset value and enabling execution of the diagnostic using measurements from the zeroed sensor. Another control action may be executed when the measured differential pressure is not within the allowable range of the threshold, including disabling the execution of the diagnostic and setting a diagnostic code indicating that the sensor may be faulty. | 03-13-2014 |
20140069082 | EGR Control in Engine Equipped With Cylinders Having Dual Exhaust Valves - A method and system for controlling recirculated exhaust gas composition and quantity provided to an internal combustion engine, which has one or more separately controllable combustion cylinders, a main exhaust line and an exhaust gas recirculation (EGR) loop. A first exhaust valve is connected to the main exhaust line, and a second exhaust valve is connected to the EGR loop. The operation of the exhaust valves is controlled such that exhaust does not flow through both exhaust valves at the same time. Control of the exhaust valves is coordinated with the main fueling event used to control the exhaust composition exiting each valve for every cylinder on every cycle. During each engine cycle, a post-combustion fuel injection event is also used to add fuel to the exhaust in-cylinder, which flows only through the second (EGR) exhaust valve. | 03-13-2014 |
20140069083 | BOOSTER AIR HEATER FOR HIGH MOISTURE FUELS - A system and method for drying pulverized high moisture fuel for use in a selective catalytic reduction system equipped combustion system is provided. The combustion system includes a mill for pulverizing fuel, an air heater, a booster air heater and a fuel duct for feeding dried pulverized fuel to a combustion furnace. | 03-13-2014 |
20140069084 | Metering System for Spraying a Urea Solution into the Exhaust Gas Stream of an Internal Combustion Engine - A metering system for injecting a urea solution into the exhaust gas flow of an internal combustion engine for selective catalytic reduction, and method for controlling the injecting of a urea solution by means of compressed air, wherein the metering system is connected to a urea solution tank and a compressed air supply, wherein the metering system comprises at least one nozzle through which the urea solution can be injected into the exhaust gas flow by compressed air, including an electronic control unit and air valve for regulating the pressure and/or the quantity of air and/or the valve opening times of the compressed air supply and a sensor for measuring the pressure and/or the quantity of air disposed in the compressed air supply between the air valve and the nozzle so that the quantity of compressed air fed in for atomizing the urea solution is controlled. | 03-13-2014 |
20140069085 | METHOD AND INTERNAL COMBUSTION ENGINE SYSTEM FOR KEEPING AN EXHAUST GAS AFTERTREATMENT SYSTEM WITHIN ITS WORKING TEMPERATURE RANGE - A method and internal combustion engine system are provided for keeping an exhaust gas aftertreatment system within its working temperature range during an idle or motoring engine operation mode of an internal combustion engine. The method includes sensing the temperature of the gas at the gas intake side of the internal combustion engine and/or of the exhaust gas; determining whether or not the sensed temperature value is in a predetermined temperature interval or below a predetermined temperature threshold; determining whether the internal combustion engine is in idle or motoring engine operation mode; in case the internal combustion engine is determined to be in an idle or motoring engine operation mode, controlling the temperature of the gas at the gas intake side of the internal combustion engine to be within the predetermined temperature range or below the predetermined temperature threshold by recirculating exhaust gas through a connecting duct by controlling at least one valve. | 03-13-2014 |
20140075920 | METHOD AND APPARATUS FOR TREATING EXHAUST GAS - A method for treating exhaust gas is provided, which includes measuring SO3 concentration in the exhaust gas which contains at least SO2 and SO3 by using an SO3 gas analyzer; injecting fine particles into the exhaust gas after the step of measuring; cooling the exhaust gas after the step of injection, by recovering heat from the exhaust gas; collecting fly ash from the cooled exhaust gas; and removing at least SO2 from the exhaust gas after the step of collecting by absorbing the SO2 with an absorbing solution. In addition, an apparatus for treating exhaust gas is provided, which includes an SO3 gas analyzer; a fine particles injector; a heat exchanger; an electrostatic precipitator; an absorption tower; and a fine particle feed controller. | 03-20-2014 |
20140075921 | POWER SYSTEM FOR CONTROLLING PHOSPHORUS AGING - A method of controlling a power system including an engine and an exhaust treatment system having an exhaust treatment device is disclosed. The method includes determining a catalyst parameter indicative of a conversion efficiency of the exhaust treatment device. The method further includes determining a weighted index based on the catalyst parameter. The method further includes determining a plurality of first index values. In the method, each first index value of the plurality of first index values is predicted as a function of a corresponding respective aftertreatment control strategy. The method further includes selecting an aftertreatment control strategy based on a comparison between the weighted index and each first index value of the plurality of first index values. In the method, the selected aftertreatment control strategy changes the catalyst parameter. The method also includes operating the exhaust treatment system according to settings corresponding to the selected aftertreatment control strategy. | 03-20-2014 |
20140083082 | METHOD FOR REGENERATING A NITROGEN OXIDE STORAGE CATALYTIC CONVERTER AND A DEVICE FOR THIS PURPOSE - Methods for regenerating a nitrogen oxide storage catalytic converter which is monitored to ensure that it exhibits a sufficient operating temperature for its regeneration, and a regeneration occurs at a point in time in which a flow rate (v) of an exhaust flow through the nitrogen oxide storage catalytic converter ( | 03-27-2014 |
20140083083 | METHOD FOR CONTROLLING THE NOx CONCENTRATION IN THE EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE - In a method for controlling the NOx concentration in the exhaust gas of an internal combustion engine in which an NOx control deviation is calculated from an actual NOx value and a desired NOx value, a control value is calculated based on the NOx control deviation via an NOx controller and by means of the control value at least one condition of the cylinder inlet flow volume of the internal combustion engine is adjusted in that, additionally, an adaption injection begin is determined in dependence on the control value of the NOx controller, and the injection begin is changed by the adaption injection begin. | 03-27-2014 |
20140090360 | TECHNIQUES FOR RAISING EXHAUST TEMPERATURES - One embodiment is a unique strategy for raising exhaust temperatures which includes deactivating a first group of cylinders while maintaining a second group of cylinders in a combustion mode and injecting fuel into each of one of the second group of cylinders not earlier than 2 degrees before top dead center (TDC). The strategy also includes passing fuel rich exhaust from the second group of cylinders into an exhaust pathway and oxidizing at least a portion of the fuel rich exhaust in the exhaust pathway. In one form, the oxidizing occurs independent of any catalytic influence. Other embodiments include unique methods, systems, and apparatus for raising exhaust temperatures and/or regenerating one or more components of an aftertreatment system. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings. | 04-03-2014 |
20140090361 | EMISSION CONTROL WITH A PARTICULATE MATTER SENSOR - A method for controlling a particulate matter sensor heater is provided. The method includes operating the heater to burn-off soot accumulated on the sensor; and adjusting the heater level based on sensor output generated during the heater operation. In this way, improved heater control can be achieved using the sensor output already available. | 04-03-2014 |
20140090362 | METHOD FOR REGENERATING NOX STORAGE CATALYTIC CONVERTERS OF DIESEL ENGINES WITH LOW-PRESSURE EGR - The invention relates to a method for regenerating nitrogen oxide storage catalytic converters and to a correspondingly adapted exhaust-gas purification system for lean-burn engines. In particular, the present invention relates to the regeneration of nitrogen oxide storage catalytic converters during special driving situations of the vehicle. | 04-03-2014 |
20140096511 | Method And Device For Operating An SCR System - A method for operating a selective catalytic reduction (SCR) system having a urea solution supply and an ultrasound based urea concentration sensor, the measurement signal of the urea concentration sensor being representative of a propagation time of an ultrasonic pulse along a predefined path length in a fluid of the urea solution supply includes: heating at least the fluid in a detection region of the urea concentration sensor from a predefined first temperature to a predefined second temperature; during the heating, detecting the measurement signal at at least a third and fourth temperature, and in each case determining a raw concentration characteristic value as a function of the respective measurement signal, which raw concentration characteristic value is representative of the propagation time of the ultrasonic pulse; and determining a concentration characteristic value, representative of a concentration of urea in the fluid, as a function of the raw concentration characteristic values. | 04-10-2014 |
20140102078 | EXHAUST GAS PURIFICATION SYSTEM FOR VEHICLE AND REGENERATION CONTROL METHOD THEREOF - An exhaust gas purification system and a regeneration control method thereof is configured to determine whether a regeneration condition of particulate filter is satisfied through vehicle information to regenerate the particulate filter until particulate matter has reached a predetermined reference amount by increasing temperature of exhaust gas when a regeneration condition is satisfied, to maintain temperature of lean NOx trap in a range of a predetermined reference temperature when regeneration of the particulate filter has reached the predetermined reference amount, to provide desulfurization performed to the lean NOx trap during rich burn, and regeneration where the particulate matter during lean burn is removed according to engine being controlled to drive such that lean burn and rich burn are repeatedly and alternately performed, and to control engine to drive by a normal burn when the desulfurization of the lean NOx trap and the regeneration of the particulate filter are completed. | 04-17-2014 |
20140102079 | REGENERATION METHOD AND MOTOR VEHICLE - A regeneration method ( | 04-17-2014 |
20140102080 | NH3 EMISSIONS MANAGEMENT IN A NOX REDUCTION SYSTEM - A system includes an internal combustion engine producing an exhaust gas, an aftertreatment system receiving the exhaust gas, the aftertreatment system including a particulate filter positioned upstream of an SCR catalyst component, and a urea injector operatively coupled to the aftertreatment system at a position upstream of the SCR catalyst component. The system further includes a controller that interprets an exhaust temperature value, an ambient temperature value, and a urea injection amount. The controller determines a urea deposit amount in response to the exhaust temperature value, the ambient temperature value, and the urea injection amount, and initiates a desoot regeneration event in response to the urea deposit amount. The desoot regeneration event includes operating the engine at a urea decomposition exhaust temperature. | 04-17-2014 |
20140109553 | Diesel Engine Exhaust Aftertreatment System and Method of Operation - A diesel engine exhaust aftertreatment system and method of use. The system and method combine the attributes of lean or stoichiometric operation, using multiple LNTs (lean NOx traps) with one being capable of acting both as a lean NOx trap and a three-way catalyst. The engine is operated with lean air-to-fuel ratios during times that LNT treatment can efficiently reduce NOx from the exhaust gas. During times that lean NOx treatment is ineffective, the diesel engine is operated at or near a stoichiometric air-fuel ratio, so that three-way catalyst treatment can be used. | 04-24-2014 |
20140109554 | Method For Operating a Motor Vehicle Diesel Engine - A method for operating a motor vehicle diesel engine having an exhaust emission control system is provided. The emission control system includes an oxidation catalytic converter, a particle filter, and an SCR catalytic converter, in which the exhaust gas that is discharged from the diesel engine is passed through the oxidation catalytic converter before passing through the particle filter and the SCR catalytic converter. A regeneration of the particle filter with thermal soot burn-off is occasionally carried out, during which the diesel engine is operated at an air-fuel ratio having a lambda value (λ) of at least approximately 1.0, and air is added to the exhaust gas after it exits the oxidation catalytic converter and before it enters the particle filter air, so that soot deposited on the particle filter is burnt-off. | 04-24-2014 |
20140109555 | METHOD FOR TREATING EXHAUST GAS CONTAINING SOOT PARTICLES - A method for converting soot particles of an exhaust gas includes providing at least nitrogen dioxide or oxygen in the exhaust gas, ionizing soot particles with an electric field, depositing electrically charged soot particles on inner channel walls of at least one surface precipitator, and bringing at least nitrogen dioxide or oxygen into contact with the deposited soot particles on the inner channel walls of the at least one surface precipitator. A device for carrying out the method includes at least one surface precipitator having a plurality of channels through which the exhaust gas can flow and extending between an inlet region and an outlet region, and at least one deposit inhibitor for electrically charged soot particles provided in at least part of the inlet region, especially allowing the soot particles to be evenly deposited and the surface precipitator to be continuously regenerated. | 04-24-2014 |
20140116027 | MULTI-LEG AFTERTREATMENT SYSTEM - An apparatus is disclosed, including an exhaust conditions module structured to interpret a diesel particulate filter (DPF) delta pressure value, a flow balance correlation, a NO | 05-01-2014 |
20140116028 | Particulate Filter Control System And Method - A system and method for controlling the operation of a particulate filter is disclosed. The objective of this control system is to manipulate the properties and spatial distribution of contaminant material accumulated in filters to reduce filter pressure drop and associated deleterious impacts of the contaminant material on filter performance. | 05-01-2014 |
20140116029 | EXHAUST TEMPERATURE CONTROL - An exhaust system ( | 05-01-2014 |
20140116030 | SYSTEMS AND METHODS FOR AN EXHAUST GAS TREATMENT SYSTEM - Various systems and methods are provided for an exhaust gas treatment system. In one example, a system includes an exhaust gas treatment device and a wire wrapped around an exterior circumference of the exhaust gas treatment device. Continuity of the wire is monitored such that degradation of the wire due to degradation of the exhaust gas treatment device is indicated. | 05-01-2014 |
20140123627 | SYSTEM AND METHOD FOR PARTICULATE FILTER REGENERATION - In one exemplary embodiment of the invention, a method for controlling regeneration for an exhaust system including a particulate filter is provided, where the method includes determining a mass flow rate of oxygen, determining a particulate mass, providing information describing desired set point temperatures corresponding to oxygen mass flow rates and particulate mass values and determining a temperature set point for exhaust gas entering the particulate filter based on the mass flow rate of oxygen, the particulate mass and the information describing desired set point temperatures corresponding to oxygen mass flow rates and particulate mass values. The method further includes communicating a signal to control a parameter for at least one selected from the group consisting of: a hydrocarbon injector, a heating device and a fuel injector configured to provide hydrocarbon post-injection to a cylinder of the internal combustion engine, the controlling based on the determined temperature set point. | 05-08-2014 |
20140123628 | SYSTEM AND METHOD FOR PARTICULATE FILTER REGENERATION - In one exemplary embodiment of the invention, a method for controlling regeneration for an exhaust system of an internal combustion engine, wherein the exhaust system includes a particulate filter is provided, where the method includes determining a mass flow rate of oxygen received from the internal combustion engine, determining a particulate mass within the particulate filter, determining a desired particulate burn rate based on the mass flow rate of oxygen and the particulate mass and determining a current particulate burn rate. The method also includes determining a correction value based on the desired particulate burn rate and the current particulate burn rate, determining a temperature set point for exhaust gas entering the particulate filter based on the correction value, an engine speed and an engine load and communicating a signal, from a controller, to control a parameter for a regeneration system based on the determined temperature set point. | 05-08-2014 |
20140123629 | AMMONIA SLIP DETECTION - A method of detecting ammonia in the exhaust system includes detecting a predetermined engine operating condition. Upon detecting the predetermined operating condition, the method determines a first NO | 05-08-2014 |
20140123630 | Method and Device for Reactivating Exhaust-Gas Purification Systems of Diesel Engines with Low-Pressure EGR - The invention relates to a method for reactivating a system composed of an oxidation catalytic converter ( | 05-08-2014 |
20140123631 | METHODS AND SYSTEMS FOR VARIABLE DISPLACEMENT ENGINE CONTROL - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection. | 05-08-2014 |
20140130481 | EXHAUST AFTER TREATMENT DEVICE MODE REGULATION - Method and system for controlling the temperature dependent mode of an exhaust after treatment device, EATD, within an engine system comprising: identifying a target EATD mode. Regulating an EATD temperature to within a temperature range corresponding with the target mode by controlling a gas pressure difference of the engine system between a first location and a second location. | 05-15-2014 |
20140130482 | Device for the Purification of Exhaust Gases from a Heat Engine, Comprising a Ceramic Carrier and an Active Phase Mechanically Anchored in the Carrier - Device for the purification of exhaust gases from a thermal combustion engine comprising: | 05-15-2014 |
20140137543 | Reductant Delivery Unit For SCR Systems Having Improved Deposit Resistance - A reductant delivery unit for selective catalytic reduction (SCR) after-treatment for vehicles includes a fluid injector having a fluid inlet and a fluid outlet. The fluid inlet receives a source of urea solution. An injector flange is coupled directly with an end of the fluid injector and has a flange outlet in fluid communication with the fluid outlet of the fluid injector. The flange outlet is associated with an exhaust gas flow path upstream of a SCR catalytic converter with the fluid injector controlling injection of urea solution into the exhaust gas flow path. Internal surface structure that defines the flange outlet includes a conical surface joined with at least one radius surface. The radius surface is constructed and arranged to resist formation of deposits on the internal surface structure due to break down of the urea solution. | 05-22-2014 |
20140144125 | SCR CATALYST DIAGNOSTICS - In one embodiment, a method for an engine comprises operating the engine with an upstream exhaust sensor, intermediate exhaust sensor, and downstream exhaust sensor each indicating rich, adjusting engine operation to operate the engine with an upstream exhaust sensor, intermediate exhaust sensor, and downstream exhaust sensor each indicating lean, adjusting engine operation to operate the engine with the upstream exhaust sensor indicating rich and the intermediate and downstream exhaust sensors each indicating lean, and indicating degradation of an SCR catalyst based on when the intermediate and downstream exhaust sensors switch from lean to rich. | 05-29-2014 |
20140144126 | METHOD AND SYSTEM FOR INITIATING AN ENGINE AFTER-RUN STATE AND CONTROLLING A NITROGEN OXIDE SENSOR SELF-DIAGNOSTIC TOOL - A system and method for initiating an engine after-run state and controlling a nitrogen oxide sensor self-diagnostic tool are provided. The system may include an internal combustion engine, an exhaust system, a selective catalytic reduction (SCR) device and at least two NOx sensors to measure the efficiency of the SCR device and a controller or host machine. The controller, via the present method, executes a first control action to disable the self-diagnostic tool when one of an occurrence of a particulate filter regeneration event and a non-occurrence of a calibration threshold is detected. The controller executes a second control action, initiating an engine after-run state and enabling the self-diagnostic tool when one of a non-occurrence of a particulate filter regeneration event and an occurrence of the calibration threshold is detected. | 05-29-2014 |
20140150405 | SYSTEM AND METHOD FOR SCR INDUCEMENT - A system and method of inducing proper operation of a diesel engine exhaust after-treatment system employing SCR technology monitors components to detect a fault condition representing one of a DEF level fault, a DEF quality fault, and a tampering fault, activates a trigger event indicator in response to detecting the fault condition. The trigger event indicator provides an indicium to an operator of the presence of the fault condition. The system and method also activates an inducement event indicator in response to activating the trigger event indicator. The inducement event indicator provides an indicium to the operator that the engine will be shut down if the fault condition is not addressed within a predetermined time period. The system and method causes shutdown of the engine when the fault condition is not addressed within the predetermined time period. | 06-05-2014 |
20140150406 | METHODS AND SYSTEMS FOR A PARTICULATE MATTER SENSOR - Various systems and methods are described for a particulate matter sensor coupled to an exhaust system of an engine. One example method comprises, during a measurement mode, generating a particulate flow rate based on the sensor and adjusting one or more engine operating parameters based on the flow rate. The method further includes, during a reduced contamination mode, heating the sensor to repel particulate from the sensor, and not adjusting the one or more operating parameters based on the sensor. | 06-05-2014 |
20140150407 | INTEGRATED LOAD BANK AND EXHAUST HEATER SYSTEM FOR A DIESEL GENSET EXHAUST AFTERTREATMENT SYSTEM - An integrated load bank and exhaust heater for a diesel genset exhaust aftertreatment system of the type having a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) section. The load bank/heater can function as a load bank when testing the genset, as a heat source to optimize SCR efficiency, as to thermally regenerate the DPF filter. | 06-05-2014 |
20140150408 | INTEGRATED LOAD BANK AND EXHAUST HEATER SYSTEM WITH LOAD SHED CAPABILITY FOR A DIESEL GENSET EXHAUST AFTERTREATMENT SYSTEM - An integrated load bank and exhaust heater for a diesel genset exhaust aftertreatment system of the type having a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) section. The load bank/heater can function as a load bank when testing the genset, as a heat source to optimize SCR efficiency, as to thermally regenerate the DPF filter. | 06-05-2014 |
20140150409 | Method, Apparatus, and System To Control Selective Catalytic Reduction (SCR) Catalyst Ammonia Slip During High Temperature Transitions - Method, apparatus, and system to control ammonia slip in a selective catalytic reduction (SCR) system. The method includes detecting an engine operation transition event, increasing NOx to the SCR catalyst, and decreasing a reductant dose. The system includes a controller to receive an engine transition signal, anticipate a temperature transition at the SCR catalyst in response to the engine transition signal, and cause a NOx increase in the exhaust gas stream to the SCR catalyst and a decrease of reductant to the SCR catalyst coinciding with the temperature transition at the SCR catalyst. The apparatus includes a NOx increase module to cause the NOx increase in the exhaust gas stream to the SCR catalyst in response to the engine transition signal. The apparatus also includes a reductant shut-off module configured to cause the reductant addition to the exhaust gas stream to turn off in response to the engine transition signal. | 06-05-2014 |
20140150410 | AMMONIA GAS GENERATOR FOR PRODUCING AMMONIA IN ORDER TO REDUCE NITROGEN OXIDES IN EXHAUST GASES - The present invention relates to an ammonia gas generator for generating ammonia from an ammonia precursor substance and to the use thereof for reducing nitrogen oxides in exhaust, in particular from industrial facilities, from combustion engines, from gas engines, from diesel engines or from petrol engines. | 06-05-2014 |
20140157758 | After-Treatment System and Method for Six-Stroke Combustion Cycle - A method and system of operating an internal combustion engine on a six-stroke cycle utilizes an after-treatment system to reduce emissions such as nitrogen oxides. The method and system introduce a first fuel charge to a combustion chamber and combusts the first fuel charge to produce a first stoichiometric lean condition. The method and system next introduce a second fuel charge and combust the second fuel charge to produce a second stoichiometric lean conditions. The exhaust gasses are then directed to a selective catalytic reduction catalyst with a reductant agent to reduce the nitrogen oxides to nitrogen and water. | 06-12-2014 |
20140157759 | EXHAUST GAS AFTER-TREATMENT METHOD - An exhaust gas after-treatment method includes determining a regeneration condition of a particulate matter filter, eliminating trapped particulate matter to a predetermined amount by raising a temperature of exhaust gas to a first value so as to regenerate the particulate matter filter. An exhaust gas flows into a nitrogen oxide purifier is controlled in a lean condition (air/fuel ratio >14.5) while the particulate matter filter is being regenerated sulfur components are eliminated from the nitrogen oxide purifier by controlling exhaust gas that flows into the nitrogen oxide purifier after the lean condition is performed. Subsequently, the lean condition and a rich condition (air/fuel ratio <14.5), and then completes the regeneration of the particulate matter filter is completed or the elimination of the sulfur component from the nitrogen oxide purifier is completed. | 06-12-2014 |
20140157760 | METHOD OF OPERATING A DIESEL ENGINE SYSTEM HAVING LNT AND SCR AFTERTREATMENT DEVICES - A method of operating a diesel engine | 06-12-2014 |
20140157761 | METHOD FOR REGULATING AN IONIZATION DEVICE IN AN EXHAUST-GAS AFTERTREATMENT APPARATUS AND MOTOR VEHICLE IN WHICH THE METHOD IS CARRIED OUT - A method for regulating an ionization device in an exhaust gas after-treatment device of an internal combustion engine, includes placing at least one cathode at a distance from an anode in the exhaust gas after-treatment device, applying a high voltage between the at least one cathode and the anode, predefining a first value for the high voltage, detecting a current generated by the high voltage between the at least one cathode and the anode and predefining a second value for the high voltage if the detected current exceeds a predefinable first current intensity for a predefinable number of times. A motor vehicle in which the method is carried out is also provided. | 06-12-2014 |
20140157762 | METHOD FOR CONTROLLING AN EXHAUST-GAS AFTERTREATMENT DEVICE OF A HYBRID DRIVE, AND HYBRID DRIVE - A method for controlling an exhaust gas aftertreatment device of a vehicle hybrid drive is provided. The method comprises operating the hybrid drive only by a combustion engine, only by a non-combustion motor, or by both, as a function of a temperature of the exhaust aftertreatment device, and conducting exhaust gas of the hybrid drive at least partially through the exhaust aftertreatment device, the engine and motor each providing output to power the vehicle. In this way, the aftertreatment device may be operated at an optimal temperature for conversion performance. | 06-12-2014 |
20140165536 | EJECTOR IN CONJUNCTION WITH POST-CATALYST EXHAUST THROTTLE FOR VACUUM GENERATION - Methods and systems are provided for expediting catalyst heating and generating vacuum by controlling an EBV to direct exhaust through an ejector arranged in parallel with the EBV. A position of the EBV may be controlled to achieve a desired exhaust backpressure for current engine operating conditions and stored vacuum level. Compensation for the effect of EBV position on engine airflow may be provided by adjustment of other parameters such as intake throttle position and spark timing. | 06-19-2014 |
20140165537 | ZERO CERIA WASHCOAT CATALYST MONITOR - A catalyst degradation detection method for use with a zero ceria catalyst. The method uses techniques to measure transient responses to engine control events of upstream and downstream sensors to determine catalyst degradation and performance. By measuring transient behavior, the method can determine catalyst degradation and performance based on the limited oxygen storage of precious metal catalysts that do not include added ceria or other materials with high oxygen capture rates. | 06-19-2014 |
20140165538 | LNT CONTROL METHOD FOR VEHICLE - An LNT control method for a vehicle may minimize the loss ratio of fuel efficiency while satisfying limits of NOx by changing a rich mode control plan in accordance with the purification rate of NOx in LNT which changes with the degree of deterioration of LNT catalyst. | 06-19-2014 |
20140174057 | Exhaust Gas Aftertreatment Module - An aftertreatment module for the treatment of exhaust gasses from a power system includes a first aftertreatment brick and a second aftertreatment brick. The first and second aftertreatment bricks can be flow-through type catalysts for catalyzing byproducts in the exhaust gasses. The aftertreatment module can include a first channel directing the incoming exhaust gasses in a first direction through the first aftertreatment brick and a second channel directing the exhaust gasses through the second aftertreatment brick. The first and second channel can be in a side-by-side arrangement. To communicate the exhaust gasses between the first and second channels, a traverse channel can redirect the gas flow within the aftertreatment module. | 06-26-2014 |
20140182267 | SYSTEMS AND METHODS FOR MANAGING EMISSIONS FROM AN ENGINE OF A VEHICLE - Disclosed embodiments include methods of removing carbon dioxide from combustion gas from an engine of a vehicle, systems for removing carbon dioxide from combustion gas from an engine of a vehicle, vehicles, methods of managing carbon dioxide emissions from an engine of a vehicle, and computer software program products for managing carbon dioxide emissions from an engine of a vehicle. | 07-03-2014 |
20140182268 | SYSTEMS AND METHODS FOR MANAGING EMISSIONS FROM AN ENGINE OF A VEHICLE - Disclosed embodiments include methods of removing carbon dioxide from combustion gas from an engine of a vehicle, systems for removing carbon dioxide from combustion gas from an engine of a vehicle, vehicles, methods of managing carbon dioxide emissions from an engine of a vehicle, and computer software program products for managing carbon dioxide emissions from an engine of a vehicle. | 07-03-2014 |
20140182269 | METHOD AND APPARATUS FOR CONTROLLING UREA INJECTION AMOUNT OF VEHICLE - A method is provided for controlling a urea injection amount of a vehicle that controls urea ejection in consideration of a difference between an internal temperature change rate and a regeneration temperature of an SCR integral diesel particulate filter. The method includes: detecting a reproduction temperature rising rate when in a regeneration mode; stopping, if a reproduction temperature rising rate exceeds a predetermined first reference, ejection of urea, and controlling, if a reproduction temperature rising rate is less than a predetermined first reference, urea ejection; controlling, if a temperature decreasing rate according to urea ejection is less than a predetermined second reference while reproducing the filter, correction of an injection amount of urea; and controlling, if a difference between a target regeneration temperature and an actual regeneration temperature exceeds a predetermined third reference according to urea ejection while reproducing the filter, correction of an injection amount of urea. | 07-03-2014 |
20140182270 | METHOD AND APPARATUS FOR CONTROLLING UREA INJECTION AMOUNT OF VEHICLE - An apparatus and method for controlling a urea injection amount of a vehicle provides precision improvement of urea injection by determining a urea injection amount according to a collection amount of soot that is collected at an SCR integral diesel particulate filter and an accumulation amount of ash. The method includes: detecting a collection amount of soot that is collected at the SCR integral diesel particulate filter and calculating an effective volume of the SCR integral diesel particulate filter according to enlargement of an accumulation amount of ash; calculating an NH3 target storage amount by reflecting the soot collection amount and an effective volume decrement according to ash accumulation; and providing urea injection by determining an NH3 storage control amount and determining a urea necessary injection amount according to the NH3 target storage amount. | 07-03-2014 |
20140182271 | SCR SYSTEM AND A METHOD OF PURGING IT - There is provided a system for storing and injecting an additive into exhaust gas from an internal combustion engine, the system comprising a tank for storing the additive, an injector, and a pump for driving the additive from the tank to the injector via an injection channel, the system also comprising a purge device mounted between the pump and the injection channel. The purge device comprises a chamber and piston moving equipment slidably mounted in the chamber, the purge device being designed so that: | 07-03-2014 |
20140182272 | USING RESISTANCE EQUIVALENT TO ESTIMATE HEATER TEMPERATURE OF AN EXHAUST GAS AFTER-TREATMENT COMPONENT - A temperature of a heated component is determined for control and monitoring. The heater driver, upon receipt of a turn-on signal, generates a current within a component of an electronic catalyst or exhaust after-treatment component, wherein the current through the component generates an appropriate loss to generate heat for facilitation of an exhaust after-treatment process. The heater driver regulates the energy to the heated component based on the electrical resistance of that component as a function of temperature and a predetermined reference value for that temperature. | 07-03-2014 |
20140190147 | HYBRID ELECTRIC VEHICLE PARTICULATE REGENERATION METHOD AND SYSTEM - A method is applied to regenerate particulate matter in a particulate filter of a hybrid electric vehicle having a combination of a combustion engine and an electric motor for propelling the vehicle, the hybrid electric vehicle having an electrically heated catalyst disposed in flow communication with the particulate filter in an exhaust system of the vehicle. The method determines whether the combustion engine is or is not combusting fuel, and under a condition where the combustion engine is not combusting fuel, the catalyst is electrically heated until it has reached a temperature suitable to cause ignition of the particulate matter. The electric motor is used to facilitate rotation of the combustion engine at a rotational speed suitable to draw air into and be exhausted out of the combustion engine into the exhaust system, across the catalyst, and into the particulate filter to facilitate ignition of the particulate in the filter. | 07-10-2014 |
20140190148 | METHODS FOR NOx REDUCTION USING EXHAUST-GAS CONDENSATE - The system and methods described allow for reduce emissions by using a recirculation device within an engine that connects an air feed line to an exhaust line while cooling the exhaust-gas to form a condensate for further cooling the engine system. In one particular example, a cooling unit is described that cools the exhaust-gas stream flowing there through and collects a condensate out of the exhaust-gas stream for injection back into the air feed line via an injecting device. In this way, an injection of water may be made to reduce NOx emissions during vehicle operations, and the outlay for storage of water on board the vehicle may be eliminated. | 07-10-2014 |
20140196438 | ASSEMBLY AND METHOD FOR REDUCING NITROGEN OXIDES, CARBON MONOXIDE AND HYDROCARBONS IN EXHAUSTS OF INTERNAL COMBUSTION ENGINES - An assembly and method for reducing nitrogen oxides, carbon monoxide and hydrocarbons in exhausts of internal combustion engines, wherein the exhaust is acted upon in a first stage catalytic converter. A first portion of the first stage catalytic converter output is cooled and a second portion of the catalytic converter output is not cooled. The cooled and not cooled exhausts are united and directed to a second stage catalytic converter. Air is injected into a selected one of (1) the not cooled exhaust prior to the juncture thereof with the cooled exhaust, and (2) the combined cooled and not cooled exhausts after the juncture thereof. | 07-17-2014 |
20140196439 | METHOD AND APPARATUS FOR REDUCING EMISSIONS AND/OR REDUCING FRICTION IN AN INTERNAL COMBUSTION ENGINE - A method and apparatus for reducing at least one of HC, CO, and NO | 07-17-2014 |
20140202135 | METHODS AND SYSTEMS FOR HUMIDITY DETECTION VIA AN EXHAUST GAS SENSOR - Various methods and system are described for determining ambient humidity via an exhaust gas sensor disposed in an exhaust system of an engine. In one example, a reference voltage of the sensor is modulated between a first and second voltage during non-fueling conditions of the engine. The ambient humidity is determined based on an average change in pumping current while the voltage is modulated. | 07-24-2014 |
20140202136 | EXHAUST GAS TREATMENT DEVICE, METHOD FOR PROCESSING EXHAUST GAS, AND MOTOR VEHICLE - The invention relates to an exhaust-gas treatment device for processing exhaust gas from a combustion aggregate, especially a diesel engine. Moreover, the present invention relates to a method for processing exhaust gas from a combustion aggregate by means of selective catalytic reaction, and it also relates to a motor vehicle in which the method according to the invention is implemented or which has the exhaust-gas treatment device according to the invention. It is provided that the exhaust-gas treatment device comprises an exhaust-gas system and, arranged in it, an oxidation catalyst, a reduction catalyst for selective catalytic reduction, and a particle filter, whereby the oxidation catalyst is arranged upstream from the reduction catalyst and the reduction catalyst is arranged upstream from the particle filter. The reduction catalyst ( | 07-24-2014 |
20140208716 | EXHAUST SYSTEM HAVING SENSOR PLACEMENT DETECTION - An exhaust control system for use with a combustion engine is disclosed. The system may have an exhaust passage, an exhaust sensor located within the exhaust passage and configured to generate a first signal indicative of an exhaust parameter, and an operational sensor associated with the combustion engine and configured to generate a second signal indicative of an operational parameter. The system may have a controller associated with the combustion engine, the exhaust sensor, and the operational sensor. The controller may be configured to detect a change in the operational parameter based on the second signal and to detect a change in the exhaust parameter based on the first signal. The controller may measure an elapsed time between detection of the change in the operational parameter and the change in the exhaust parameter, and determine a placement-related parameter of the exhaust sensor based on the elapsed time. | 07-31-2014 |
20140208717 | ENGINE SYSTEM WITH PASSIVE REGENERATION OF A FILTER IN EGR LOOP - An engine system for a machine is disclosed. The engine system may have an intake manifold configured to direct air into a donor cylinder and a non-donor cylinder of an engine. The engine system may have a first exhaust manifold configured to direct exhaust from the non-donor cylinder to the atmosphere and a second exhaust manifold configured to receive exhaust from the donor cylinder. The engine system may further have a control valve configured to selectively direct a first amount of exhaust from the second exhaust manifold to the intake manifold and an after-treatment component configured to treat the first amount of exhaust. In addition, the engine system may have a controller configured to adjust a first operating parameter of the donor cylinder such that a ratio of an amount of a gaseous component and an amount of particulate matter in the first amount of exhaust exceeds a predetermined threshold. | 07-31-2014 |
20140208718 | METHOD AND DEVICE FOR DETERMINING THE OXYGEN STORAGE CAPACITY OF AN EMISSION CONTROL SYSTEM - A method and a device for determining the oxygen storage capacity of an emission control system in an exhaust duct of an internal combustion engine. In a first phase, the internal combustion engine being operated using an air-fuel mixture having a rich air-to-fuel ratio, and in a second phase, the engine being operated at a lean air-to-fuel ratio; and an oxygen storage capacity of the emission control system being determined from an oxygen input into the emission control system during the second phase; and/or in order to determine a hydrocarbon gas storage capacity, the internal combustion engine being operated during the first phase at a lean air-to-fuel ratio, and operated in the second phase at a rich air-to-fuel ratio; and the hydrocarbon gas storage capacity being determined from the oxygen discharge from the emission control system during the second phase. | 07-31-2014 |
20140208719 | VEHICULAR FLUID INJECTION SYSTEM, CONTROLLER AND METHOD FOR HEATING SAID FLUID INJECTION SYSTEM - A vehicular fluid injection system including a storage tank, an injection line, a heating system including an electrical heating element being powered by a power source, and a voltage converter inserted between the power source and the heating element, alone or combined with a PWM power regulation. | 07-31-2014 |
20140208720 | CATALYTIC BURNER SYSTEM FOR DPF REGENERATION - A system and method of effective regeneration of a diesel particulate filter used in the exhaust system of a diesel engine during low engine operating temperatures, is disclosed. Generally speaking, a catalytic burner system and method used in filter regeneration on a diesel engine comprises a burner diesel oxidation catalyst (BDOC) coupled to an exhaust flow of the diesel engine, a mixer fluidly coupled to the BDOC, a diesel oxidation catalyst (DOC) fluidly coupled to the mixer, and a diesel particulate filter (DPF) fluidly coupled to the DOC, wherein the BDOC directs the exhaust flow through the mixer, the DOC and the DPF during a regeneration cycle of the DPF under low engine temperature operating conditions. | 07-31-2014 |
20140216008 | METHODS AND SYSTEMS FOR AN EXHAUST GAS TREATMENT SYSTEM - Various systems and methods are described for an engine system with an exhaust gas treatment system including a particulate filter. In one example method, accumulated hydrocarbons are removed from the exhaust gas treatment system by increasing an exhaust gas temperature to a first temperature responsive to a particulate filter regeneration request during extended cold idle operation. After a predetermined duration, the exhaust gas temperature is increased to a second, higher temperature to regenerate the particulate filter. | 08-07-2014 |
20140216009 | RICH BURN INTERNAL COMBUSTION ENGINE CATALYST CONTROL - A catalyst system may include a catalyst and a first sensor that detects contents of gases entering the catalyst and reports the contents of the gases entering the catalyst to an emissions control module. A second sensor and a third sensor may detect contents of gases exiting the catalyst and report the contents of the gases exiting the catalyst to the emissions control module. The emissions control module may determine an air-fuel ratio based on the contents of gases entering the catalyst and the contents of gases exiting the catalyst. The emissions control module may instruct an air-fuel regulator to operate an engine using the air-fuel ratio. | 08-07-2014 |
20140216010 | DEVICE FOR MEASURING A QUANTITY OF A REDUCING AGENT, PREFERABLY NH3, CONTAINED IN A VESSEL - The invention relates to a device for measuring a quantity of a reducing agent, preferably NH | 08-07-2014 |
20140216011 | SYSTEM AND METHOD FOR CATALYST HEAT UTILIZATION FOR GAS TURBINE WITH EXHAUST GAS RECIRCULATION - A system includes a turbine combustor, a turbine, an exhaust gas compressor, a flow path, and at least one catalytic converter. The turbine is driven by combustion products from the turbine combustor. The exhaust compressor is configured to compress and route an exhaust gas from the turbine to the turbine combustor. The flow path leads from the exhaust gas compressor, through turbine combustor, and into the turbine. The catalytic converter is disposed along the flow path. | 08-07-2014 |
20140216012 | INTEGRATED FUEL CATALYST MONITOR - A method is provided for monitoring an emission device coupled to an engine. In one example approach, the method comprises: following a deceleration fuel shut-off duration, indicating degradation of the emission device based on an amount of rich products required to cause a sensor to become richer than a threshold. The amount of rich products required may be correlated to an amount of oxygen stored in the emission device. The indication of emission device degradation may be further based on air mass and temperature during delivery of the required rich products. | 08-07-2014 |
20140230408 | SYSTEM AND METHOD FOR EXHAUST GAS AFTERTREATMENT - In one embodiment, a method for controlling nitrogen oxides in an exhaust gas received by an exhaust system, the exhaust system including a first selective catalytic reduction device, an exhaust gas heat recovery device and a second selective catalytic reduction device is provided. The method includes flowing the exhaust gas from an internal combustion engine into the first selective catalytic reduction device, receiving the exhaust gas from the first selective catalytic reduction device into the exhaust gas heat recovery device and directing the exhaust gas to a heat exchanger in the exhaust gas heat recovery device based on a temperature of the internal combustion engine proximate moving engine components. The method includes adsorbing nitrogen oxides from the exhaust gas via a nitrogen oxide adsorbing catalyst disposed in the heat exchanger and flowing the exhaust gas from the exhaust gas heat recovery device into the second selective catalytic reduction device. | 08-21-2014 |
20140230409 | METHOD AND DEVICE FOR DETERMINING A STARTING TIME OF A REGENERATION PROCESS FOR REGENERATING A DIESEL PARTICLE FILTER - Method for determining a starting time of a regeneration process of a particle filter which is connected into the exhaust train of an internal combustion engine, in particular of a diesel engine, wherein the data of an air mass flow rate meter, of an exhaust gas temperature sensor and of a differential pressure sensor are fed to a control unit and the control unit starts the regeneration on the basis of the data by means of the comparison with characteristic diagrams. | 08-21-2014 |
20140230410 | INTERNAL COMBUSTION ENGINE WITH EXHAUST-GAS AFTERTREATMENT ARRANGEMENT AND INTAKE AIR ARRANGEMENT AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF SAID TYPE - A system and method for controlling temperature of a urea reductant to form ammonia for NOx reduction in a selective catalytic reducer coupled to a turbocharged engine exhaust by portioning a flow across the reductant of one or more of the following: a combination of compressed air and ambient air; and/or a combination of the exhaust upstream and downstream the turbine. | 08-21-2014 |
20140230411 | DOSING AND MIXING ARRANGEMENT FOR USE IN EXHAUST AFTERTREATMENT - A method for causing exhaust gas flow to flow at least 270 degrees in a first direction about a perforated tube using a baffle plate having a main body with a plurality of flow-through openings and a plurality of louvers positioned adjacent to the flow-through openings. The method includes deflecting a first portion of the exhaust gas flow with the main body of the baffle plate. The method also includes allowing a second portion of the exhaust gas flow to flow through the flow-through openings of the baffle plate. The method also deflects the second portion of the exhaust gas flow at a downstream side of the main body with the louvers hereby causing the second portion of the exhaust gas flow to flow in the first direction about the perforated tube. | 08-21-2014 |
20140230412 | TRAPPED SOOT ESTIMATOR - A diesel engine ( | 08-21-2014 |
20140230413 | SYSTEM, METHOD, AND APPARATUS FOR CONTROLLING AN AFTERTREATMENT SYSTEM HAVING A PARTICULATE FILTER AND A RICH NOX CONVERSION DEVICE - A system includes an internal combustion ignition engine with an exhaust gas flow, a particulate filter in the exhaust gas flow, a NO | 08-21-2014 |
20140237992 | Diesel Exhaust Particulate Filter - A method and device for testing a diesel engine to determine whether the engine's diesel particulate filter is functioning properly is provided. The device comprises an elongated pole with a service ring disposed at one end. The service ring is designed to removably support a filtration means, which is composed of porous cloth material. The device is removably affixed over the outlet of a diesel engine exhaust pipe, allowing the filtration means to trap any particulates that may be contained within the engine exhaust. If the diesel engine particulate filter is functioning properly, there will be no particulates collected by the filtration means; if the diesel engine particulate filter is not functioning properly, the present invention allows the user to collect physical evidence of such. | 08-28-2014 |
20140237993 | DIESEL ENGINE ARRANGEMENT AND METHOD FOR VARNISH BUILD-UP CONTROL - A method is provided for controlling varnish build-up in a variable geometry turbine (VGT) of a diesel engine turbocharger. According to the method, it is determined whether an operation parameter is at a level established for initiating a varnish build-up control sequence. Upon determining that the operation parameter is at the established level, the varnish build-up control sequence is initiated. The sequence comprises increasing exhaust temperature upstream of the VGT to a first exhaust temperature, and changing an opening size of a VGT nozzle between a smaller and a larger opening size in association with increasing the exhaust temperature to the first exhaust temperature. A diesel engine arrangement is also provided. | 08-28-2014 |
20140245718 | Compressor for Exhaust Treatment System - An exhaust aftertreatment system for an engine is provided that includes a burner, an air supply system and a control module. The air supply system may be in fluid communication with the burner and may include an air compressor disposed upstream from the burner. The air compressor may include a pump mechanism, a clutch assembly selectively transferring torque from the engine to the pump mechanism, and a motor selectively driving the pump mechanism. The control module may be in communication with the clutch assembly and the motor. The control module may selectively switch the air compressor between a first operating mode in which the clutch assembly transfers torque from the engine to the pump mechanism and a second operating mode in which the motor drives the pump mechanism. | 09-04-2014 |
20140245719 | APPARATUS, METHOD, AND SYSTEM FOR DIAGNOSING REDUCTANT DEPOSITS IN AN EXHAUST AFTERTREATMENT SYSTEM - An exhaust gas treatment system for an internal combustion engine may have a reductant delivery system that delivers reductant to an exhaust stream in an exhaust aftertreatment system. A temperature sensor may be positioned in or near the flow of reductant and exhaust to measure the temperature of the reductant and exhaust. A change in temperature over time, such as an increase, decrease, or change in variation amplitude, may indicate the presence of a reductant deposit in the system. Detection of the deposit may initiate a regeneration cycle in which the operating characteristics of the system change to eliminate the reductant deposit to prevent it from hindering the performance of the exhaust aftertreatment system. | 09-04-2014 |
20140245720 | METHOD FOR OPERATING A DOSING DEVICE AND MOTOR VEHICLE HAVING A DOSING DEVICE - A method for operating a dosing device for metering an additive to an exhaust-gas treatment device includes determining a dosing amount of additive required by the exhaust-gas treatment device in step a). Subsequently, in step b), an operating mode for the dosing device is determined by carrying out at least steps b.1) and b.2). In step b.1), at least one characteristic operating value of at least one component of the dosing device is provided being definitive of a degree of aging of the dosing device. In step b.2), an operating mode for the dosing device is set in dependence on the characteristic operating value from step b.1). In step c), the dosing device is operated with the set operating mode so that the dosing amount required in step a) is supplied to the exhaust-gas treatment device. A motor vehicle having a dosing device is also provided. | 09-04-2014 |
20140250864 | SYSTEM AND METHOD FOR PREVENTING THE CLEANING OF A DIESEL PARTICULATE FILTER - A system for preventing the cleaning of the diesel particulate filter ( | 09-11-2014 |
20140250865 | EXHAUST GAS AFTERTREATMENT BYPASS SYSTEM AND METHODS - A method for protecting an exhaust aftertreatment system of an internal combustion engine from deterioration by selectively diverting exhaust gasses from the engine away from a component of the exhaust aftertreatment system includes assessing a status of an operating condition associated with a physical condition of the component of the internal combustion engine. The status of the operating condition is compared with a threshold value that corresponds with deterioration of the physical condition of the component. A valve upstream of the component is moved to a first position to open a bypass fluid path directing exhaust gasses around the component when the status of the operating condition meets the threshold value to reduce deterioration of the component. The valve is moved to a second position to close the bypass fluid path thereby directing exhaust gasses to the component when the status of the operating condition does not meet the threshold. | 09-11-2014 |
20140250866 | Solid Ammonia Delivery System - Systems and methods for generating and controlling generation of ammonia. The ammonia generation control system includes a communication module and an ammonia generation module coupled to the communication module. The ammonia generation module is configured to cause generation of gaseous ammonia from a solid ammonia source in response to a determination that an ammonia storage quantity in an ammonia dosing storage cartridge meets a first pre-determined threshold and a determination that an engine condition of an internal combustion engine coupled to ammonia dosing storage cartridge meets a pre-determined engine condition threshold. | 09-11-2014 |
20140250867 | EXHAUST GAS TREATMENT CATALYST, METHOD FOR PRODUCING EXHAUST GAS TREATMENT CATALYST, AND METHOD FOR REGENERATING EXHAUST GAS TREATMENT CATALYST - Provided is an exhaust gas treatment catalyst including: a de-NOx catalyst; and a coating layer being provided on a surface of the de-NOx catalyst and containing at least one selected from the group consisting of alkali metal carbonates and alkaline earth metal carbonates. | 09-11-2014 |
20140260190 | Exhaust Aftertreatment Control System And Method For Maximizing Fuel Efficiency While Reducing Emissions - An engine exhaust treatment and fuel efficiency improvement system includes a NOx module that determines a quantity of NOx emitted from an engine. A selective catalytic reduction (SCR) efficiency module determines a SCR efficiency to reduce the determined NOx quantity below a predetermined threshold. A reagent dosing module determines a quantity of reagent required to reduce the NOx quantity below the predetermined threshold. An injection optimization module determines whether an increase in system operating efficiency may be obtained by changing an injected reagent quantity and an engine operating parameter in cooperation with each other while maintaining the NOx quantity below the threshold, the system being operable to change the reagent injection quantity and engine operating parameter to increase system efficiency. | 09-18-2014 |
20140260191 | Exhaust Treatment System with Urea Temperature Rationality Diagnostic - A method for monitoring an exhaust after-treatment system that doses an exhaust treatment fluid held from a tank into an exhaust stream. The method includes determining a first temperature of the exhaust treatment fluid in the tank using a temperature sensor. If the first temperature of the exhaust treatment fluid is less than a predetermined temperature, a heater is activated to increase the first temperature of the exhaust treatment fluid. The increasing first temperature is then monitored relative to the predetermined temperature. Then, a second temperature when a phase change of the exhaust treatment fluid occurs is detected. The detected second temperature is then compared to the predetermined temperature to determine whether the exhaust treatment fluid is of sufficient quality, or to determine whether the temperature sensor is rational. | 09-18-2014 |
20140260192 | Exhaust System For Dual Fuel Engines - Exhaust system for a dual-fuel engine that is provided with a first fuel and a second fuel. The exhaust system includes an exhaust passageway, with an exhaust treatment component provided in the exhaust passageway. A thermal enhancement device communicates with the exhaust passageway and is located upstream from the exhaust treatment component, wherein the thermal enhancement device is operable to raise a temperature of an exhaust located in the exhaust passageway during a switch between the first fuel and the second fuel that is provided to the dual-fuel engine. The exhaust treatment system can also include a by-pass pipe in communication with the exhaust passageway that by-passes the exhaust treatment component, wherein during combustion of the first fuel by the dual-fuel engine, the by-pass pipe is open. During combustion of the second fuel by the dual-fuel engine, the by-pass pipe is closed. | 09-18-2014 |
20140260193 | ENGINE SYSTEM FOR INCREASING AVAILABLE TURBOCHARGER ENERGY - An engine system for a machine is disclosed. The engine system may have an intake manifold configured to direct air into a donor cylinder and a non-donor cylinder of an engine. The engine system may also have a first exhaust manifold configured to direct exhaust from the non-donor cylinder to the atmosphere. The engine system may also have a second exhaust manifold configured to receive exhaust from the donor cylinder. The engine system may further have a control valve configured to selectively direct a first amount of exhaust from the second exhaust manifold to the intake manifold. In addition, the engine system may have an orifice configured to allow a second amount of exhaust to flow from the second exhaust manifold to the first exhaust manifold. | 09-18-2014 |
20140260194 | SYSTEMS AND METHODS FOR CONTROLLING A COMBUSTION ENGINE - Some implementations of a system for controlling an internal combustion engine (e.g., a natural gas fired internal combustion engine or another type of engine) can include an air-fuel ratio controller that is configured to monitor sensor feedback from an exhaust path and to thereafter automatically adjust the air-fuel mixture. The system can be employed in particular methods to control emissions from the engine, for example, by reducing pollutants emitted as components of the exhaust from the engine. | 09-18-2014 |
20140260195 | ENGINE EXHAUST MANIFOLD ENDOTHERMIC REACTOR AND ASSOCIATED SYSTEMS AND METHODS - Engine exhaust manifold endothermic reactors, and associated systems and methods are disclosed herein. A system in accordance with a particular embodiment of the technology includes an engine having a combustion region and an exhaust passage coupled to the engine to receive exhaust products from the combustion region. The exhaust passage can at least partially enclose a passage interior region. The system can further include a reactor having an external heat transfer surface positioned in the passage interior region, and a reaction zone positioned in a region enclosed by the external heat transfer surface. A hydrogen donor source can be coupled in fluid communication with the reaction zone of the reactor vessel via a donor passage, and a product passage can be coupled to the reaction zone to receive a reaction product from the reaction zone. | 09-18-2014 |
20140260196 | AIR DITHERING FOR INTERNAL COMBUSTION ENGINE SYSTEM - Described herein is an air dithering system for an internal combustion engine generating exhaust gas that includes an exhaust line in exhaust gas receiving communication with the internal combustion engine. The system also includes an exhaust aftertreatment component positioned within the exhaust line in exhaust gas receiving communication with exhaust gas in the exhaust line. Further, the system includes an air injector in air injecting communication with exhaust gas in the exhaust line at a location downstream of the internal combustion engine and upstream of the exhaust aftertreatment component. | 09-18-2014 |
20140260197 | SYSTEMS AND METHODS FOR DETERMINING THE QUANTITY OF A COMBUSTION PRODUCT IN A VEHICLE EXHAUST - Exhaust after treatment systems for internal combustion engine powered vehicles are provided. One system includes logic in the form of one or more routines implemented by one or more of the system's components for determining the quantity of NO | 09-18-2014 |
20140260198 | EXHAUST AFTERTREATMENT SYSTEM - An exhaust aftertreatment module is provided. The exhaust aftertreatment module includes a housing having a first end and a second end. The at least one inlet is disposed between the first end and the second end and is configured to introduce an exhaust into the housing. A mixing tube is disposed downstream of the at least one inlet. The mixing tube is configured to direct the exhaust towards the second end of the housing. The exhaust aftertreatment module further includes a single bank of Selective Catalytic Reduction (SCR) catalysts disposed at an oblique angle to a longitudinal axis of the mixing tube. The single bank of SCR catalysts is configured to receive the exhaust redirected from the second end of the housing. | 09-18-2014 |
20140260199 | System and Method for Post-Shutdown Temperature Management and Purge - A machine includes an engine having a coolant system, an electrical system, and an exhaust system. A diesel exhaust fluid (DEF) injector provides DEF into the exhaust system. The DEF injector includes a housing that forms a coolant passage therethrough. The coolant passage is adapted to accommodate a flow of coolant through the coolant passage for cooling the DEF injector. A DEF pump is arranged to provide DEF to the DEF injector from a reservoir during operation of the engine. A power management module is associated with the electrical system, the DEF injector and the DEF pump. An auxiliary power unit is associated with the power management module and is configured to remain active after the engine electrical system has been deactivated. The power management module is configured to cause a purge of the DEF from the DEF injector when the engine is shut down. | 09-18-2014 |
20140260200 | Catalytic Reduction of NOx - A system for NO | 09-18-2014 |
20140260201 | METHOD, SYSTEM, AND APPARATUS FOR DIAGNOSING AN EXHAUST AFTERTREATMENT COMPONENT - An apparatus includes an engine output module that determines an engine output power parameter for an engine. The apparatus includes an output power threshold module that determines if the engine output power parameter is below an output power threshold. The apparatus includes a NOx module that determines a nitrogen oxide (“NOx”) efficiency of a selective catalytic reduction (“SCR”) system in response to the output power threshold module determining that the determined engine output power parameter is below the output power threshold. The SCR system is in exhaust receiving communication with the engine. The apparatus includes a NO | 09-18-2014 |
20140260202 | REDUCTANT MATERIAL DEPOSIT REDUCTION IN EXHAUST AFTERTREATMENT SYSTEMS - In one non-limiting embodiment, an apparatus for treating exhaust includes a reductant injector, an aftertreatment component including a NO | 09-18-2014 |
20140260203 | Gaseous Fuel Spark-Ignited Internal Combustion Engine System - A system and method for reforming a portion of an exhaust gas stream in an internal combustion engine system. An exhaust gas recirculation assembly divides the exhaust gas stream into a recycle stream and a vent stream. A mixer in fluid receiving communication with the recycle stream forms a combination stream by mixing a gaseous fuel stream with the recycle stream. A thermochemical recuperator component fluidly connects to the mixer and includes a first flow path and a second flow path. The first flow path has a catalyst through which the combination stream flows to create a reformate stream, and the second flow path has a heat transfer area for transferring heat from the vent stream to the combination stream. | 09-18-2014 |
20140260204 | EXHAUST GAS PURIFICATION APPARATUS AND METHOD FOR INCREASING CORROSION RESISTANCE OF EXHAUST GAS PURIFICATION APPARATUS - An exhaust gas purification apparatus includes a SCR converter selectively reducing and purifying NOx in exhaust gas upon being supplied with ammonia generated from urea aqueous solution and an injection nozzle injection-supplying the urea aqueous solution on exhaust gas upstream side of the SCR converter. At least a part of an exhaust pipe located between the injection nozzle and the SCR converter has a double-pipe structure including inner and outer pipes, each having a welded portion, and the welded portion of the outer pipe was welded from an inside of the outer pipe. Thus, the outer pipe has fine welded portion on an inner peripheral surface where a welding temperature is high and the coarse welded portion on an outer peripheral surface where the welding temperature is low, resulting in an ordered atomic arrangement and thus improved corrosion resistance of the inner peripheral surface, which may be exposed to ammonia. | 09-18-2014 |
20140283502 | METHOD OF CONTROLLING AN EXHAUST GAS TEMPERATURE OF AN INTERNAL COMBUSTION ENGINE - A method of controlling an exhaust gas temperature at a particulate filter inlet is disclosed. The particulate filter is located in an exhaust system of an internal combustion engine. The method of controlling exhaust gas temperature at the particulate filter inlet includes a late injection, whose quantity is estimated as function of an exhaust gas volumetric flowrate. | 09-25-2014 |
20140283503 | METHOD FOR CONDITION DETERMINATION OF AN EXHAUST-GAS PURIFICATION SYSTEM - The present invention relates to a process for determining the state of an exhaust-gas purification device. The exhaust-gas purification device is one which can store gas and/or particles. By means of the proposed process, it is for example possible for the loading state of the exhaust-gas aftertreatment system, for example the oxygen storage state of a catalytic converter which is provided with an oxygen-storing material, such as for example a three-way catalytic converter, to be analysed. The present process operates contactlessly through the analysis of resonances which arise upon the excitation of the catalytic converter using the purification device as microwave cavity resonator | 09-25-2014 |
20140290214 | FLUID CONNECTORS FOR REDUCTANT SYSTEMS - A reductant system for an aftertreatment system of an internal combustion engine is disclosed. The reductant system includes at least one reductant feed line and a reductant system component such as a dosing module. The feed line is connected to the dosing module with a fluid connector. The fluid connector includes a body made from a first material that has a low heat conductivity and an insert made from a second material that has a greater heat conductivity than that of the first material. The insert extends from the body of the fluid connector into a storage chamber of the dosing module, and conducts heat from heated reductant in the feed line to the reductant stored in the storage chamber. | 10-02-2014 |
20140290215 | EMISSIONS CONTROL FOR ENGINE SYSTEM - A method for controlling emissions in an engine system including an internal combustion engine and a catalytic converter with oxygen storage capacity. The method includes determining a real time oxygen storage level of the three-way catalytic converter based on a real time exhaust gas flow rate and a real time measured upstream oxygen quantity with respect to the catalytic converter. Further, maintaining an optimal oxygen storage level of the three-way catalytic converter for different types of fuel used in the internal combustion engine. | 10-02-2014 |
20140290216 | VEHICULAR CONTROL DEVICE AND VEHICULAR CONTROL METHOD - In a vehicle including an engine, an electrically heatable catalyst device (EHC), and a first motor generator that generates electric power in accordance with the engine's motive power with the vehicle in a substantially stopped state with a vehicular speed lower than a threshold vehicular speed, an ECU determines, based on an amount A by which an accelerator pedal is operated and a vehicular speed V, whether a large accelerator operation has been performed with the vehicle in the substantially stopped state. If the ECU determines that the large accelerator operation has been performed with the vehicle in the substantially stopped state, the ECU activates an energization timer, and before the energization timer reaches a reference energization period of time α, the ECU energizes the EHC, and once the energization timer has reached the reference energization period of time α, the ECU ceases energizing the EHC. | 10-02-2014 |
20140290217 | METHOD AND SYSTEM PERTAINING TO MONITORING PARTICLE EMISSIONS IN COMBUSTION ENGINE EXHAUSTS - A method for determining particle emissions from a combustion engine: a post-treatment system including at least one particle filter post-treats an exhaust flow from combustion in the engine. A PM (particulate matter) sensor situated upstream of the particle filter determines, at a location upstream of the particle filter, a first particle content of the exhaust flow arising from the engine and uses the determined first particle content as a basis for determining whether the particle content of the exhaust flow downstream of the particle filter fulfils a first condition. Also, a system and a vehicle for performing the method are disclosed. | 10-02-2014 |
20140290218 | APPARATUS AND METHOD FOR ENGINE BACKPRESSURE REDUCTION - An improved catalytic substrate for use with a can in an automotive exhaust system, the substrate being of the type which is disposed in use in the can, the improvement comprising: an insulation material thermally separating the substrate into a central zone and a tubular outer zone surrounding the central zone, the insulation material, central zone and outer zone collectively defining a modified substrate, the insulation material being adapted such that, in an operating condition, the temperature difference across the insulation material is at least 25° C. | 10-02-2014 |
20140298773 | ENGINE SYSTEM - A diesel engine having improved particulate emissions for particle material (PM) reduction for off-highway engine systems includes
| 10-09-2014 |
20140298774 | Emission Abatement Assembly Having A Mixing Baffle And Associated Method - An emission abatement assembly includes a fuel-fired burner having a combustion chamber and a particulate filter positioned downstream of the fuel-fired burner. A mixing baffle is positioned between the fuel-fired burner and the particulate filter. | 10-09-2014 |
20140298775 | Regeneration Control System For Exhaust Filter And Method - A regeneration control system for an exhaust filter in an internal combustion engine system includes a first sensing mechanism for monitoring an exhaust flow resistance of the exhaust filter, and a second sensing mechanism for monitoring an attenuation of electromagnetic energy transmitted through the exhaust filter. The regeneration control system further includes an electronic controller coupled with the sensing mechanisms and configured to output a filter regeneration command responsive to an amount of particulate matter trapped within the exhaust filter. The electronic controller is further configured to weight data from the first and second sensing mechanisms in determining the amount of particulate matter. Weighting of the data may be responsive to an operating state of the internal combustion engine system. Related methodology is also disclosed. | 10-09-2014 |
20140298776 | EXHAUST INJECTION MUFFLER - An internal combustion engine is coupled to an electric power generator. An exhaust manifold for the engine includes an exhaust gas conduit. A housing includes a catalyst in fluid communication with the conduit to receive exhaust produced by the engine. The catalyst is operable to reduce one or more constituents of the exhaust. | 10-09-2014 |
20140298777 | SPARK IGNITION INTERNAL COMBUSTION ENGINE AND CONTROL METHOD OF SPARK IGNITION INTERNAL COMBUSTION ENGINE - A spark ignition internal combustion engine includes an exhaust gas reflux device capable of refluxing exhaust gas having passed through a catalyst for exhaust gas purification to an intake passage, an ignition timing control means for setting an ignition timing retard amount capable of preventing knocking according to a NOx concentration in the exhaust gas while the exhaust gas is refluxed, a NOx concentration estimation means for estimating the NOx concentration in the exhaust gas, and a purification performance reduction determination means for determining a reduction in purification performance of the catalyst. The ignition timing control means sets the ignition timing retard amount based on the NOx concentration in the exhaust gas before passage through the catalyst if the purification performance reduction determination means determines that the purification performance of the catalyst has been reduced to a state set in advance. | 10-09-2014 |
20140305100 | METHOD FOR PREVENTING CLOGGING OF UREA INJECTION NOZZLE OF SCR SYSTEM - In a method for preventing clogging of a urea injection nozzle in an after-run operation of a selective catalytic reduction (SCR) system which supplies urea stored in a urea tank through a supply module, a urea injection nozzle and a urea line connecting the supply module and the urea injection nozzle, the method may include an emptying step where the urea is withdrawn into the urea tank by creating negative pressure in the supply module and a pressure equilibrium step where the pressure in the supply module is recovered by stopping creation of negative pressure in the supply module, wherein in the pressure equilibrium step, whether to forcibly inject the urea is controlled on the basis of pressure after a predetermined time has passed since the pressure equilibrium step began. | 10-16-2014 |
20140311122 | FLOW CONTROLLED ELECTRICALLY ASSISTED DPF REGENERATION - A particulate filter assembly, an exhaust gas treatment system having a particulate filter assembly, and a control method for flow controlled zoned regeneration of the particulate filter assembly are provided. The particulate filter assembly is configured to receive an exhaust gas stream from an internal combustion engine and includes an inlet end configured to receive the exhaust gas stream, a filter configured to remove particulates from the exhaust gas stream, a heating device positioned upstream from the filter having a plurality of zones, each zone of the plurality of zones independently operable to heat a corresponding region of the filter and an exhaust flow valve positioned downstream from the filter configured to selectively restrict flow of the exhaust gas stream through the filter. | 10-23-2014 |
20140311123 | ELECTRICALLY HEATED DOC USING HCSCR COLD START NOX CONTROLS - An exhaust gas treatment system for an internal combustion engine is provided. The system includes an exhaust gas conduit extending from the engine configured to receive an exhaust gas stream from the engine, a first injector in fluid communication with the exhaust gas conduit configured to selectively inject fuel containing unburned hydrocarbon (HC) into the exhaust gas conduit and an oxidation catalyst disposed in the exhaust gas conduit downstream from the first injector. The system further includes a hydrocarbon selective catalyst reduction (HCSCR) catalyst applied on the oxidation catalyst, a heating device positioned at an upstream side of the oxidation catalyst configured to heat the oxidation catalyst and HCSCR catalyst, a selective catalyst reduction (SCR) device disposed within the exhaust gas conduit downstream from the oxidation catalyst, and a particulate filter positioned downstream from the selective catalyst reduction device. | 10-23-2014 |
20140311124 | EXHAUST GAS HEATING METHOD - A method according to the present invention of heating exhaust gas to be introduced into an exhaust gas purifying device from an internal combustion engine by heating and igniting fuel supplied into an exhaust passage from a fuel supply valve includes the steps of determining a necessity for supplying fuel into the exhaust passage, setting an amount of fuel to be supplied into the exhaust passage from the fuel supply valve, the amount being set when it is judged in the determining step that fuel needs to be supplied into the exhaust passage, checking an operating state of the engine, and controlling an air-fuel ratio of exhaust gas such that the air-fuel ratio falls within an area where amounts of both smoke and HC to be generated in the exhaust gas are low in the operating state of the engine checked in the checking step. | 10-23-2014 |
20140311125 | METHOD, APPARATUS, AND SYSTEM USED FOR PURIFYING AND SILENCING EXHAUST OF INTERNAL COMBUSTION ENGINE - A method for purifying and muffling exhaust gas from an internal combustion engine, comprising the following steps: 1) allowing exhaust gas discharged by the internal combustion engine to enter into the interior of a housing ( | 10-23-2014 |
20140311126 | AIR-INJECTION SYSTEM TO IMPROVE EFFECTIVENESS OF SELECTIVE CATALYTIC REDUCTION CATALYST - Embodiments are described to improve the durability of a lean NO | 10-23-2014 |
20140311127 | EXHAUST GAS AFTER TREATMENT SYSTEM WITH TEMPERATURE CONTROL - A vehicle emission control system is configured to operatively receive exhaust gas from a combustion engine and includes an exhaust gas after treatment system (EATS) configured to operatively clean the received exhaust gas, a burner unit configured to operatively heat the received exhaust gas to a predetermined temperature before the exhaust gas is provided to the EATS, and a pump unit configured to operatively provide the burner unit with air to be used b the burner unit in a heating process. The pump unit is configured to be operatively propelled by exhaust gas, and the burner unit is arranged upstream the pump unit such that exhaust gas from the burner unit is operatively provided to the pump unit for propelling the pump unit. | 10-23-2014 |
20140311128 | REAGENT DOSING SYSTEM AND METHOD OF DOSING REAGENT - A reagent dosing system for dosing a reagent into the exhaust gas stream of an internal combustion engine includes a reagent tank for storing a supply of reagent; an injector module including an atomising dispenser and a positive-displacement metering pump which draws reagent from the reagent tank and delivers it to the dispenser; a supply line coupling the reagent tank to the injector module; a dosing control unit operable to control the injector module to inject reagent into the exhaust gas stream; and an additional priming pump arranged, in use, to urge reagent along the supply line toward the injector module under selected conditions. | 10-23-2014 |
20140311129 | CONTROL APPARATUS AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - By raising a temperature of an element portion of a particulate matter sensor ( | 10-23-2014 |
20140318102 | EXHAUST AFTERTREATMENT SYSTEM WHERE AN ACTIVATOR MATERIAL IS ADDED TO THE REDUCTANT FED TO THE CATALYTIC CONVERTER - An exhaust gas after treatment system includes a catalytic converter arrangement with at least one catalytic material, wherein the catalytic converter arrangement is arranged in an exhaust gas path downstream of a combustion engine, and further includes one or more dosing interfaces for feeding at least one reducing agent for reducing an NO | 10-30-2014 |
20140318103 | METHOD OF CONTROLLING A DIESEL PARTICULATE FILTER - A method and apparatus for controlling a diesel particulate filter is disclosed. The control is carried out with the aid of a soot loading model selected from a plurality of available soot loading models including at least one soot loading physical model which makes use of signals from an exhaust gas pressure sensor. A reliability score is allocated to each soot loading model such that the soot loading model with the best reliability score is used for the diesel particulate filter control. If a DPF parking effect is identified based on an engine shut-off time a DPF inlet temperature either the reliability score of the soot loading physical model or the reliability scores of all remaining (non-physical) soot loading models are changed, and use of the soot loading physical model is avoided or disabled to help the control of the diesel particulate filter. | 10-30-2014 |
20140318104 | SYSTEM AND METHOD FOR SCR INDUCEMENT - A system and method of inducing proper operation of a diesel engine exhaust after-treatment system employing SCR technology monitors components to detect a fault condition representing one of a DEF level fault, a DEF quality fault, and a tampering fault, activates a trigger event indicator in response to detecting the fault condition. The trigger event indicator provides an indicium to an operator of the presence of the fault condition. The system and method also activates an inducement event indicator in response to activating the trigger event indicator. The inducement event indicator provides an indicium to the operator that the engine will be shut down if the fault condition is not addressed within a predetermined time period. The system and method causes shutdown of the engine when the fault condition is not addressed within the predetermined time period. | 10-30-2014 |
20140318105 | Method and Device for Operating an Internal Combustion Engine Comprising an Exhaust Gas Cleaning Unit - A method for operating an internal combustion engine having an exhaust emission control unit with at least one exhaust emission control component which acts catalytically and/or by filtration involves operating the internal combustion engine, during a cold start or warm-up of the internal combustion engine, using a cold start engine operating process with predefined values for predefined internal combustion engine operating variables. The cold start and/or the warm-up of the internal combustion engine is controlled or regulated as a function of soot loading of a particle filter of the exhaust emission control unit. | 10-30-2014 |
20140325960 | Method and Device for Detecting Different Exhaust Gas Probe Errors During the Operation of an Internal Combustion Engine - To operate an internal combustion engine, a specified forced stimulation is applied to an air ratio as the basis for a target value of a lambda controller. In diagnostic operation, a diagnostic function is used to identify a probe error of the exhaust gas probe, and a value of the measurement signal is recorded as a start value in chronological correlation with an edge of the target value curve of the lambda controller and the current value of the measurement signal is recorded as an end value after a specified first time duration. The start and end values are used to determine whether a filter error or a dead time error of the exhaust gas probe exists. The first time duration is specified such that start value/end value difference for a filter error differs start value/end value difference for a dead time error by at least a specified difference value. | 11-06-2014 |
20140325961 | INJECTOR CONTROL METHOD - Disclosed is a control method for restoring temporary malfunction of an injector | 11-06-2014 |
20140325962 | DIESEL ENGINE EXHAUST GAS PURIFICATION METHOD AND EXHAUST GAS PURIFICATION SYSTEM - An exhaust gas purification method of a diesel engine, which purifies exhaust gas while suppressing deterioration in drivability and fuel consumption, including when exhaust gas enters a rich reduction state, opening an EGR valve and closing an intake throttle, if a temperature of an NOx occlusion reduction catalyst is at or above a predetermined temperature, and a vehicle having a diesel engine is decelerating from a speed at or above a predetermined speed, and then closing an exhaust throttle provided downstream of the NOx occlusion reduction catalyst and supplying fuel to the NOx occlusion reduction catalyst as a reductant. | 11-06-2014 |
20140325963 | INTERNAL COMBUSTION ENGINE AND CONTROL METHOD FOR SAME - An engine exhaust gas post-treatment device including a mechanism that can vary opening timing of an exhaust valve, and a control method. A unit is configured to raise a temperature of a part or all of the device to not less than a preset temperature by the mechanism opening the exhaust valve in an exhaust stroke at normal combustion within a range of an afterburning period, and the mechanism feeds the device an exhaust gas whose temperature and pressure are high due to combustion of fuel injected into a cylinder. After the exhaust gas is treated by the device, or when the device is regenerated, the unit adds an unburned fuel component to the exhaust gas by an additional injection of an injector in the cylinder or an injection of a hydrocarbon addition nozzle provided at an exhaust port in accordance with the valve opening timing by the unit. | 11-06-2014 |
20140325964 | AMMONIA GAS PRESSURE BOOSTER - A system and method for delivering a reductant into an engine exhaust stream for use in the reduction of NO | 11-06-2014 |
20140331643 | DIESEL PARTICULATE FILTER PASSIVE REGENERATION DURING STATIONARY POWER TAKE-OFF - The systems and method described above in the present disclosure allow for regeneration of a diesel particulate filter while a vehicle is in stationary power take-off mode. Described is a method of: during select power take-off conditions, reducing an EGR rate responsive to an indication to regenerate a diesel particulate filter. | 11-13-2014 |
20140331644 | EXHAUST AFTERTREATMENT COMPONENT CONDITION ESTIMATION AND REGENERATION - Described herein is an apparatus for an exhaust aftertreatment system includes a first aftertreatment component poison module that is configured to generate a first component poison regeneration request based on an estimated accumulation of a first poison on the first aftertreatment component. The accumulation of the first poison on the first aftertreatment component is based on an estimated amount of the first poison being released from the first aftertreatment component. The apparatus also includes a second aftertreatment component poison module that is configured to generate a second component poison regeneration request based on an estimated accumulation of the first poison on the second aftertreatment component. The accumulation of the first poison on the second aftertreatment component is based on the estimated amount of the first poison being released from the first aftertreatment component. | 11-13-2014 |
20140331645 | System and Method for Injector Fault Remediation - A machine includes an engine having an exhaust system. A diesel exhaust fluid (DEF) injector provides metered amounts of DEF and includes a valve adapted to selectively open in response to a command. A controller associated with the engine and the DEF injector monitors operation of the DEF injector to detect a fault and activates a failure remediation cycle when the fault has been detected. The remediation cycle includes heating the exhaust gas to heat the DEF injector and melt any urea crystals that may be causing the fault, and activating the valve of the DEF injector to evacuate molten urea from within the DEF injector. | 11-13-2014 |
20140331646 | LOW TEMPERATURE CATALYST LIGHT-OFF - A catalyst associated with an internal combustion engine can be heated to improve emissions performance of the engine. Hydrogen can be generated within the internal combustion engine by combusting a first combustion mixture having a first air-fuel ratio including excess fuel relative to a stoichiometric air-fuel ratio, such that a reforming reaction occurs during the combusting of the first combustion mixture. A second combustion mixture having a second air-fuel ratio including excess oxygen can be combusted within the internal combustion engine such that oxygen remains in second exhaust gases after the combusting of the second combustion mixture. The first exhaust gases and the second exhaust gases can be delivered to the catalyst and the catalyst is heated by reacting at least some of the hydrogen and at least some of the oxygen at the catalyst. Internal combustion engines, systems, vehicles engine management systems, and method are disclosed. | 11-13-2014 |
20140331647 | METHOD PERTAINING TO AN SCR SYSTEM AND AN SCR SYSTEM - For an SCR system for a motor vehicle ( | 11-13-2014 |
20140331648 | OVER TEMPERATURE / PRESSURE SAFETY DEVICE AND METHOD FOR DIESEL PARTICULATE FILTERS - A safety device for an exhaust gas aftertreatment system provides an alternative exhaust route in case of high temperatures or pressures within the regenerating particulate filter of the exhaust gas aftertreatment system that may cause damage to the particulate filter. The safety device comprises a valve that redirects the flow of exhaust gas from the regenerating particulate filter when specified temperature or pressure thresholds are met or exceeded. | 11-13-2014 |
20140338311 | METHOD FOR OPERATING A DOSING APPARATUS AND MOTOR VEHICLE HAVING A DOSING APPARATUS - A method for operating a dosing apparatus for providing a liquid additive includes providing the dosing apparatus with at least one pump for pumping the additive from a tank into a pressure accumulator, a dosing valve for providing additive present in the pressure accumulator in a dosed manner, and a return valve through which additive present in the pressure accumulator can be led back into the tank. A dosing demand is established, subsequently the pump is activated to build up a pressure in the pressure accumulator, then the pressure in the pressure accumulator is set to a desired metering pressure, and thereafter the liquid additive is dispensed by the dosing valve. A motor vehicle having a dosing apparatus is also provided. | 11-20-2014 |
20140345256 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE, AND CONTROL UNIT SET UP FOR CARRYING OUT THE METHOD - The invention relates to a method for operating an internal combustion engine. According to the method, an exhaust gas produced by the internal combustion engine is conducted across a 3-way catalytic converter arranged in the exhaust duct. A lambda probe detects a value characteristic of an exhaust-gas lambda number upstream of the 3-way catalytic converter, and transmits said value to an engine control unit with an integrated PI or PID regulator. By means of the PI or PID regulator of the engine control unit, through the specification of a setpoint value, a substantially stoichiometric exhaust-gas lambda number is set, and the exhaust-gas lambda number is, with predefined periodic setpoint value variation, deflected alternately in the direction of a lean lambda number and a rich lambda number (lambda modulation). At the start of each setpoint value variation, a pilot-controlled P component with subsequent I component is predefined up to a time t2, wherein the time t2 is defined by means of stored parameters, which characterize a section time behaviour, such that the probe signal or a value derived therefrom would have had to have reached the setpoint value specification at said time t2. From the time t2 onwards, for a predefinable time period until the end of the respective setpoint value variation, a switch is made to a regulating algorithm which is based on a difference between an actual value and the setpoint value of the lambda probe or a value derived therefrom. | 11-27-2014 |
20140345257 | MIXING SYSTEM - A mixing system is provided. The mixing system includes a housing defining a boundary of a mixing conduit including an expansion section with an injector mount and a reductant diverter extending into the conduit upstream of the injector mount in the expansion section. The mixing system further includes an atomizer with openings positioned in the housing and a helical mixing element positioned in the housing. | 11-27-2014 |
20140352277 | EXHAUST SYSTEM IMPLEMENTING ACTIVE REGENERATION CONTROL - An exhaust system is disclosed for use with an engine. The exhaust system may have an exhaust duct, an aftertreatment component disposed within the exhaust duct, and a resistive grid disposed within the exhaust duct at a location upstream of the aftertreatment component. The exhaust system may further have a controller configured to determine a need to heat the aftertreatment component to a threshold temperature, determine a load increase that should be placed on the engine to raise a temperature of exhaust exiting the engine when the aftertreatment component needs to be heated, and determine an amount of electrical power that should be applied to the resistive grid to raise the temperature of the exhaust. The controller may also be configured to selectively implement a combination of engine load increase and application of electrical power to the resistive grid to raise the temperature of exhaust to the threshold temperature. | 12-04-2014 |
20140352278 | METHOD AND SYSTEM FOR SELECTIVELY ENABLING AND DISABLING A DIAGNOSTIC MONITOR OF A SELECTIVE-CATALYTIC-REDUCTION DEVICE - A vehicle that includes an engine, an exhaust system, and a controller, and a method are disclosed herein. The exhaust system includes a passage for directing the exhaust gas stream from the engine through the series of exhaust after-treatment devices, including a selective-catalytic reduction device and a diesel particulate filter (DPF). The exhaust after-treatment devices are employed to reduce various exhaust emissions of the engine. The exhaust system, may however, prematurely return failing emissions results due to the amount of contaminants that have flowed through the exhaust system since the last regeneration even of the particulate filter. Therefore, the controller may, via the present method, alter the threshold of the SCR efficiency diagnostic due to contaminants accumulated on the DPF and selectively enable or disable the diagnostic based on a set of recorded instructions, to improve the robustness of the SCR efficiency diagnostic and prevent inaccurate failing emissions results. | 12-04-2014 |
20140352279 | EXHAUST GAS TREATMENT SYSTEM WITH EMISSION CONTROL DURING FILTER REGENERATION - An exhaust gas treatment system for an engine includes an exhaust gas inlet tube configured to receive an exhaust gas from the engine. A particulate filter, a heat exchange system and first and second selective catalytic reduction (SCR) devices are in fluid communication with the exhaust gas inlet tube. The particulate filter is configured to undergo thermal regeneration when the exhaust gas in the particulate filter is heated above a regeneration temperature. The controller is configured to control a temperature difference, between a present temperature of the second SCR device and a predefined optimal second SCR temperature, to be within a predefined threshold during the thermal regeneration of the particulate filter. The controller may be configured to direct an injector to inject a reductant into the first SCR device when the temperature difference is below the predefined threshold, thereby controlling a NOx emission in the exhaust gas. | 12-04-2014 |
20140352280 | AIR DRIVEN REDUCTANT DOSING SYSTEM - A dosing system for delivering reductant into an exhaust gas treatment system of an internal combustion engine using an air driven hydraulic pump, which includes a pressure pump tank and a liquid supply tank, for closed-loop controlling reductant pressure, and a three-stage PWM control method for dosing rate control. Reductant residue in the dosing system is purged by using compressed air, and when the air driven hydraulic pumps is positioned inside a reductant tank, heating means in the reductant tank can also be used for heating the air driven hydraulic pump. The closed-loop pressure control together with the three-stage PWM control allow dosing accuracy insensitive to pressure variations in compressed air, thereby a variety of compressed air sources can be used. | 12-04-2014 |
20140352281 | PARTICULATE FILTER DEVICE MONITORING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - A particulate filter device monitoring system for an internal combustion engine includes a particulate accumulation register configured to store an amount of particulate in a particulate filter. The particulate accumulation register includes a particulate accumulation trigger zone having a power limiting mode trigger. A power limiting mode trigger module is configured to limit output power of the internal combustion engine when the amount of particulate accumulation reaches the power limiting mode trigger. A particulate accumulation model module includes a particulate accumulation model configured to calculate changes in particulate accumulation in the particulate accumulation register at a first sampling rate when particulate accumulation is outside the particulate accumulation trigger zone, and at a second sampling rate when particulate accumulation is within the particulate accumulation trigger zone. | 12-04-2014 |
20140360162 | VOLTAGE CONTROL SYSTEM FOR HEATING A SELECTIVE CATALYST REDUCTION DEVICE - An exhaust gas treatment system for an internal combustion engine is provided. The exhaust gas treatment system includes an electrically heated catalyst (“EHC”) device in fluid communication with an exhaust gas conduit, a generator, a selective catalytic reduction (“SCR”) device, and a control module. The EHC device includes an electric heater and an EHC catalyst that is heated to an EHC light-off temperature. The generator is selectively operable in a target voltage mode to supply a target voltage to the electric heater. The target voltage represents a voltage required by the electric heater in order to maintain the EHC catalyst at a catalyst temperature. The SCR device is in fluid communication with the exhaust gas conduit. The SCR device is located downstream of the EHC device and includes an SCR catalyst that is selectively heated by the EHC device to a SCR light-off temperature. | 12-11-2014 |
20140360163 | SYSTEM AND METHOD FOR CONTROLLING AN ENGINE THAT INCLUDES LOW PRESSURE EGR - Methods and systems for operating an engine that includes a low pressure EGR passage and a selective reduction catalyst are disclosed. In one example, an actuator is adjusted in response to a NOx mass flow rate in the low pressure EGR passage. | 12-11-2014 |
20140360164 | Diesel Exhaust Treatment Systems and Methods - Disclosed here are systems and methods including one or more FBCs and one or more suitable aftertreatment devices, including DOCs, DPFs, and suitable combinations thereof. The systems and methods disclosed may include selecting a suitable FBC for use with a fuel with a specified sulfur content. Systems and methods disclosed here may also include using one or more ECUs to control one or more FBC dosing/metering devices to supply FBCs from one or more FBC reservoirs in the presence of a specified event. | 12-11-2014 |
20140360165 | SELECTIVE CATALYTIC REDUCTION DEVICE MONITORING SYSTEM - A selective catalytic reduction (SCR) device monitoring system includes an engine out NOx monitoring module, an SCR out NOx monitoring module configured and disposed to monitor NOx released from the SCR device, and a NOx storage model module operatively connected to the engine out NOx module and the SCR out NOx monitoring module. The NOx storage model module is configured and disposed to determine an amount of NOx stored in the SCR device. A consumed ammonia correction model module is operatively coupled to the NOx storage model module and configured and disposed to calculate a corrected consumed ammonia prediction factor. | 12-11-2014 |
20140360166 | SYSTEMS AND METHODS FOR NOX SENSOR DIAGNOSTICS - Systems and methods are disclosed for diagnosing gain rationality of an NOx sensor that is downstream of a selective catalytic reduction (SCR) catalyst. Sensor diagnostics are performed while maintaining reductant dosing to the SCR catalyst. | 12-11-2014 |
20140360167 | SYSTEM AND METHOD FOR COOLING OF AN AFTERTREATMENT MODULE - A cooling system for an aftertreatment module located within an enclosure is provided. The cooling system includes an exhaust outlet line and a venturi arrangement provided in cooperation with the exhaust outlet line. The venturi arrangement is spaced from a downstream portion of the exhaust outlet line. Moreover, the venturi arrangement relative to the downstream portion of the exhaust outline line is configured to expel heated air from the enclosure. | 12-11-2014 |
20140360168 | System and Method for Sequential Injection of Reagent to Reduce NOx from Combustion Sources - In a large exhaust duct from a lean burn combustion source, such as a boiler, diesel engine or gas turbine, multiple injectors can be used to inject a reagent, such as an aqueous solution of urea or ammonia, into the exhaust for use in the catalytic reduction of NOx in a process known in the art as selective catalytic reduction (SCR). When operating at low injection rates, such as during low combustor loads, the injectors are operated individually for short periods of time in a sequential manner. | 12-11-2014 |
20140360169 | POST THERMAL CONTROL DEVICE FOR USE WITH A NOx SLIP CATALYST - A system and method for treating diesel exhaust in a diesel exhaust system, and specifically for improved NO | 12-11-2014 |
20140366507 | Diesel Engine With In-Cylinder Soot and NOx Control Using Water or Aqueous Injection - A method of controlling emissions in the exhaust gas of a diesel engine, the engine having one or more combustion cylinders that each generates a combustion jet having a soot region. A water injector is operable to inject a spray of water or aqueous solution into the combustion jet, specifically toward the area of highest soot concentration. This water injection is timed to occur at or immediately before the combustion phase in which the soot reaches its greatest concentration. The size and shape of the spray are such that the majority of the spray reaches the area of greatest soot concentration. | 12-18-2014 |
20140366508 | WATER INJECTION FOR CATALYST OXYGEN REDUCTION AND TEMPERATURE CONTROL DURING TRANSIENT EVENTS - Methods and systems are provided for injecting water based on duration of cylinder deactivation, and exhaust catalyst temperature during an engine cylinder deactivation event so as to reduce an exhaust catalyst regeneration requirement following the cylinder deactivation, and to prevent catalyst degradation. | 12-18-2014 |
20140366509 | METHOD FOR OPERATING AN EXHAUST-GAS TREATMENT DEVICE HAVING A HEATER AND MOTOR VEHICLE HAVING THE DEVICE - A method for operating an exhaust gas treatment device including an electric heater for heating an exhaust gas flow in the exhaust gas treatment device and/or a surface in the exhaust gas treatment device and a feed point for feeding an additive into the exhaust gas treatment device to impinge upon the electric heater, includes supplying additives to the feed point, determining an operational state of the exhaust gas treatment device, in which deposits can impinge upon the electric heater, using at least one state variable, determining a cycle frequency in dependence on the operating state when the operating state lies in a predetermined operating state range, and cyclically activating and deactivating the electric heater using the determined cycle frequency when the determined operating state lies in the predetermined operating state range. A motor vehicle having the exhaust-gas treatment device is also provided. | 12-18-2014 |
20140373508 | REDUCTANT DELIVERY UNIT FOR AUTOMOTIVE SELECTIVE CATALYTIC REDUCTION WITH THERMALLY OPTIMIZED PEAK-AND-HOLD ACTUATION BASED ON AN INJECTOR OPEN EVENT - A trigger circuit is provided for a peak and hold driver circuit for a reductant delivery unit (RDU) having a solenoid-operated injector for selective catalytic reduction (SCR) after-treatment for vehicles. The peak and hold driver circuit is constructed and arranged to actuate the injector in a rise-to-peak current phase followed by a low current hold phase. The trigger circuit includes an injector open detection circuit constructed and arranged, based on a detected opening event of the injector, to trigger a transition from the rise-to-peak phase to the subsequent hold phase of the injector. | 12-25-2014 |
20140373509 | METHOD AND DEVICE FOR TREATING EXHAUST GAS CONDENSATES OF AN INTERNAL COMBUSTION ENGINE - A method for treating exhaust gas condensates of an internal combustion engine, in which the exhaust gas condensates containing nitrogen oxides are delivered to an exhaust gas recirculation system and are cooled therein. The nitrogen oxides of the cooled exhaust gas condensates are converted to ammonia through electrolysis. | 12-25-2014 |
20140373510 | METHOD FOR DETERMINING HC-CONVERSION EFFICIENCY OF A CATALYST, A DIAGNOSTIC DEVICE CONFIGURED TO CARRY OUT THE METHOD AS WELL AS A MOTOR VEHICLE HAVING SUCH A CATALYST - The invention relates to a method to determine the HC-conversion efficiency of a catalyst, which is situated in the exhaust gas flow path of an internal combustion engine and which is configured to convert hydrocarbons, by means of an oxygen-sensitive sensor that is installed downstream from the catalyst in the exhaust gas flow path and that exhibits a cross sensitivity to hydrocarbons. The method comprises: detecting a first signal of the downstream sensor in a first situation in which a first HC fraction is present in the exhaust gas upstream from the catalyst; detecting a second signal of the downstream sensor in a second situation in which a second HC fraction that is higher than the first HC fraction is present in the exhaust gas upstream from the catalyst; and determining the HC-conversion efficiency of the catalyst as a function of the first and second signals of the downstream sensor. | 12-25-2014 |
20140373511 | METHOD AND ALGORITHM FOR PERFORMING AN NH3 SENSOR RATIONALITY DIAGNOSTIC - An example method includes interpreting an NH | 12-25-2014 |
20150007551 | CONTROL SYSTEM AND CONTROL METHOD FOR ELECTRICAL HEATING CATALYZER - A control system includes an electrical heating catalyzer, a measuring device and an electronic control unit. The measuring device measures an insulation resistance between a catalyst carrier and case of the electrical heating catalyzer. The electronic control unit determines that the electrical heating catalyzer has a failure when a variation width of the insulation resistance is smaller than or equal to a set value in a historical variation in the insulation resistance measured by the measuring device. | 01-08-2015 |
20150007552 | Diesel Particulate Filter Regeneration In Transport Refrigeration System - A method and system are provided for performing a regeneration cycle for regenerating a diesel particulate filter ( | 01-08-2015 |
20150007553 | INFORMATION-DISPLAY-EQUIPPED ELECTRIC-HEATING-TYPE HEATER AND METHOD OF USING INFORMATION THEREFOR - There are disclosed an information-display-equipped electric-heating-type heater, and a method of using the above information. An information-display-equipped electric-heating-type heater includes a tubular honeycomb structure made of a conductive material and having porous partition walls to define and form a plurality of cells which become through channels for a fluid and extend from one end face to the other end face, and a circumferential wall positioned in an outermost circumference; and a pair of electrodes disposed on the circumferential wall of the honeycomb structure, and information concerning a heater performance of the electric-heating-type heater is displayed in the honeycomb structure. | 01-08-2015 |
20150013309 | AMMONIA STORAGE MANAGEMENT FOR SCR CATALYST - Various systems and methods are described for managing ammonia storage in an SCR catalyst. In one example approach, a method comprises, in response to a vehicle-off event, injecting ammonia during a final exhaust blowdown until a predetermined value of ammonia is stored in the SCR catalyst; and in response to a subsequent vehicle-on event when an amount of ammonia stored in the SCR catalyst is less than the predetermined value, injecting ammonia until the predetermined value of ammonia is stored in the SCR catalyst. | 01-15-2015 |
20150013310 | EMISSION CONTROL SYSTEM INCLUDING AN OXIDATION CATALYST AND SELECTIVE CATALYTIC REDUCTION CATALYST - An emission control system is provided. The emission control system includes an oxidation catalyst having a precious metal loading of less than 100 grams (g)/cubic foot (ft | 01-15-2015 |
20150013311 | METHOD FOR THE LOAD DEPENDENT REDUCTION OF FUEL CONSUMPTION FOLLOWING DECELERATION FUEL CUT OUT - A method for controlling a motor vehicle with an internal combustion engine and a catalytic converter is disclosed. The method includes: determining an oxygen storage value, which is a dimension for oxygen stored in the catalytic converter, detecting an engine load, carrying out a part evacuation of the oxygen from the catalytic converter with a fuel enrichment when the oxygen storage value exceeds a trigger evacuation threshold value and when the engine load is below a low-load threshold value. | 01-15-2015 |
20150013312 | METHOD AND SYSTEM FOR REGENERATION IN A VEHICLE IN A CONSIST - Methods and systems for distributing engine output among vehicles of a consist are disclosed. One example system comprises a controller including non-transitory media having instructions stored on the media and executed by the controller for adjusting distribution of engine output between at least a first engine and a second engine in response to a regeneration mode, wherein the regeneration mode regenerates an exhaust gas recirculation (EGR) cooler that is coupled to the first engine. | 01-15-2015 |
20150020503 | CONTROL OF PASSIVE SOOT OXIDATION - A system and method for controlling passive soot oxidation in a diesel particulate filter that includes sensing the temperature of exhaust gases upstream and downstream of the diesel particulate filter. The sensed temperatures are used by a control unit to predict whether the temperature of the exhaust gas within the diesel particulate is within a predetermined temperature range for passive oxidation of soot in the diesel particulate filter. If the temperatures are below passive oxidation temperatures, an auxiliary component is activated that increases the temperature of exhaust gas delivered to the diesel particulate filter. When the exhaust gas temperature within the DPF is predicted to be within passive oxidation levels but below active regeneration temperatures, the auxiliary component is deactivated. | 01-22-2015 |
20150020504 | EXHAUST FLOW ESTIMATION - The present technology provides systems for monitoring particulate matter buildup on a filter installed in the engine exhaust stream of a vehicle. A filter differential pressure sensor monitors a pressure differential across the filter. A downstream differential pressure sensor monitors a pressure differential across an exhaust stream outlet. A processor monitors a particulate buildup value based at least in part on the pressure differential across the filter and the pressure differential across the exhaust stream outlet. A method for monitoring particulate buildup is also provided. The method monitors a pressure differential across the filter, and determines a downstream exhaust flow rate based on a pressure differential between a filter outlet housing and an exit pipe, where the diameter of the filter outlet housing is greater than the diameter of the exhaust exit pipe. | 01-22-2015 |
20150020505 | METHOD FOR CALCULATING THE NO2 CONTENT AT THE INLET OF A SELECTIVE REDUCTION CATALYST AND DEVICE FOR THE IMPLEMENTATION OF THIS METHOD - A method for the calculation of the NO | 01-22-2015 |
20150020506 | METHOD AND SYSTEM FOR THE REMOVAL OF NOXIOUS COMPOUNDS FROM ENGINE EXHAUST GAS - Method and system for the removal of noxious compounds from lean burning engines, the method comprising in series the steps of contacting the exhaust gas with a catalyst being active in oxidation of volatile organic compounds and carbon monoxide, passing the treated exhaust gas through a particulate filter catalysed with a first SCR catalyst, and passing the exhaust gas leaving the particulate filter through a second SCR catalyst, wherein ammonia is injected into the exhaust upstream of the catalysed particulate filter at a temperature below or at about 220° C. and wherein urea is injected into the exhaust gas between the first and the second SCR catalyst when the exhaust gas has reached a temperature of about 200° C. | 01-22-2015 |
20150027104 | EXHAUST SYSTEM AND METHOD FOR REDUCING PARTICULATE AND NO2 EMISSIONS - An exhaust system for reducing particulate and NO | 01-29-2015 |
20150027105 | SCR TREATMENT OF ENGINE EXHAUST GASES USING TEMPERATURE CONTROL - The exhaust system of an internal combustion engine is periodically dosed to recharge an SCR catalyst with ammonia. If dosing is scheduled and exhaust gas temperature is too low to ensure recharging, a forced increase in exhaust gas temperature is effected for the period of dosing. A diagnostic to confirm correct operation of a catalytic converter may advantageously run at the same time. | 01-29-2015 |
20150027106 | CONTROL APPARATUS FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method and control apparatus is disclosed for operating an internal combustion engine equipped with an after-treatment system including a catalyst. The control is configured to: perform a DeNO | 01-29-2015 |
20150027107 | NOX CONTROL DURING ENGINE IDLE-STOP OPERATIONS - Methods and systems are provided for improving engine exhaust emissions while enabling exhaust catalyst regeneration following an engine lean event. Prior to a VDE event, or prior to an engine idle-stop, ammonia is produced and stored on an exhaust underbody SCR catalyst. Then, during the engine restart after the VDE mode or the idle-stop, the stored ammonia is used to treat exhaust NOx species while an upstream exhaust underbody three-way catalyst is regenerated. | 01-29-2015 |
20150033700 | DEFROSTING A SENSOR IN A VEHICLE SYSTEM - Systems and methods for defrosting sensing components in fluid sensing system. In one embodiment, the invention provides a defrosting system that includes a sensing system. The sensing system includes a sensor operable to sense a characteristic of the fluid in a tank. The defrosting system includes a fluid pickup line spaced apart from the sensor, and a fluid return line. The fluid return line includes an output. The output is positioned to direct fluid onto the sensing system. In one embodiment, the defrosting system further comprises a pipe configured to provide the fluid to a system external to the tank. The fluid is heated by heat generated by the external system and directed onto the sensing system at least partially defrosts fluid contained within the sensing system. | 02-05-2015 |
20150033701 | SYSTEMS, METHODS, AND APPARATUSES RELATED TO VEHICLES WITH REDUCED EMISSIONS - This disclosure relates generally to vehicles with reduced emissions. More particularly, this disclosure relates to systems, methods, and apparatuses related to vehicles with reduced carbon dioxide emissions. The carbon dioxide emissions may be stored in a carbon dioxide clathrate. | 02-05-2015 |
20150033702 | SYSTEMS, METHODS, AND APPARATUSES RELATED TO VEHICLES WITH REDUCED EMISSIONS - This disclosure relates generally to vehicles with reduced emissions. More particularly, this disclosure relates to systems, methods, and apparatuses related to vehicles with reduced carbon dioxide emissions. The carbon dioxide emissions may be stored in a carbon dioxide clathrate. | 02-05-2015 |
20150033703 | SYSTEMS, METHODS, AND APPARATUSES RELATED TO VEHICLES WITH REDUCED EMISSIONS - This disclosure relates generally to vehicles with reduced emissions. More particularly, this disclosure relates to systems, methods, and apparatuses related to vehicles with reduced carbon dioxide emissions. The carbon dioxide emissions may be stored in a carbon dioxide clathrate. | 02-05-2015 |
20150033704 | TEMPERATURE GRADIENT CORRECTION OF AMMONIA STORAGE MODEL - An exhaust gas treatment system includes a SCR device that stores a reductant that reacts with the NOx emissions and a reductant supply system to inject the reductant according to a reductant load model. At least one temperature sensor or model generates a temperature signal indicating an SCR temperature of the SCR device. The exhaust gas treatment system further includes a control module in electrical communication with the reductant supply system. The control module is configured to determine an amount of reductant that slips from the SCR device based on the at least one temperature signal and the rate of change of the SCR temperature. The control module further determines a correction factor based on the amount of slipped reductant to modify the reductant load model. | 02-05-2015 |
20150033705 | EXHAUST FLUID DOSING CONTROL SYSTEM AND METHOD - A dosing control system for an exhaust system of an engine includes: a tank containing a reductant solution having urea; an injector operable to inject the reductant solution into an exhaust flow upstream of an SCR apparatus; first and second NOx sensors disposed to sense NOx emissions in the exhaust flow upstream and downstream, respectively, of the SCR apparatus; and a control module. The control module is disposed in signal communication with the first and second NOx sensors and in operable communication with the injector, the control module being operable to set an original dosing level and decrease a dosing of the reductant solution injected by the injector based on a determination from signals received from the first and second NOx sensors that a reduction in a conversion efficiency of the SCR apparatus below a defined level of conversion efficiency has occurred. | 02-05-2015 |
20150033706 | METHOD AND APPARATUS FOR DETERMINING THE EFFICIENCY OF AN EXHAUST GAS PURIFICATION DEVICE - A method for determining the efficiency of an exhaust gas purification device of a diesel internal combustion engine for motor vehicles, having a first NOx sensor, arranged ahead of an oxidation catalyst and/or a particulate filter, and a second NOx sensor, arranged downstream of a reduction catalyst, and having a device for the metered supply of a reducing agent, wherein the method includes feeding the signals from the two NOx sensors are fed to a control unit, by means of which at least one feed quantity of the reducing agent is specified. To determine an efficiency of the oxidation catalyst and/or of the particulate filter, the NO and NO2 concentration and/or the NO2/NO ratio of the exhaust gas flow at the measurement position of the second NOx sensor and/or downstream of the reduction catalyst is determined by the control unit solely of the signal values acquired by the two NOx sensors | 02-05-2015 |
20150033707 | Method And System For An Exhaust Gas Particulate Filter - A system for determining a regeneration phase of an exhaust gas particulate filter for an internal combustion engine may include a temperature sensor for detecting an elevated exhaust gas temperature, a sensor for detecting the particulate content in the exhaust gas stream exiting from the exhaust gas particulate filter, and a processing device for determining the regeneration phase on the basis of the detected values. A method for determining a regeneration phase of an exhaust gas particulate filter for an internal combustion engine may include detecting an elevated exhaust gas temperature, sampling a signal from a sensor for detecting the particulate content in the exhaust gas stream exiting from the exhaust gas particulate filter, detecting that the particulate content is elevated, and determining the regeneration phase. | 02-05-2015 |
20150040539 | EVENT-BASED DEVIATION INTEGRATION TEMPERATURE CONTROL LOOP DIAGNOSTIC SYSTEM - An exhaust gas treatment system includes a particulate filter to collect particulate matter from exhaust gas flowing therethrough. A regeneration module performs a regeneration operation that regenerates the particular filter. The regeneration operation generates an exothermic event which heats the particulate filter above a target temperature that burns the particulate matter. At least one temperature sensor is disposed adjacent the particular filter to determine at least one temperature of the exhaust gas. The exhaust gas treatment system further includes a temperature diagnostic module to determine a temperature profile of the particulate filter based on the temperature of the exhaust gas. The temperature diagnostic module further determines a temperature deviation of the particulate filter based on a comparison between the temperature profile and a target temperature. The temperature diagnostic module diagnoses the regeneration operation based on a plurality of temperature deviations and a selected time period. | 02-12-2015 |
20150040540 | Method for Operating an Internal Combustion Engine - The invention relates to a method for operating an internal combustion engine ( | 02-12-2015 |
20150040541 | REVERSIBLE WASTE HEAT RECOVERY SYSTEM AND METHOD - A waste heat recovery (WHR) system operates in a reverse mode, permitting using the WHR system to transfer heat to the exhaust gas of an internal combustion engine. In another configuration, a WHR system may operate in two modes. The first mode removes heat from exhaust gas of an engine to perform useful work. The second mode transfers heat to the exhaust gas. The benefit of this flexible system is that a WHR system is adaptable to rapidly heat exhaust gas at startup and during other conditions where the temperature of the exhaust gas is less than a predetermined operating range. Because of the ability to rapidly warm engine exhaust gas, an exhaust gas receiving system, such as an EGR or an aftertreatment system, may function to reduce the emissions of the engine more quickly. Because this system is reversible, it retains the capability of a conventional WHR system. | 02-12-2015 |
20150047318 | Supervisory Model Predictive Selective Catalytic Reduction Control Method - A method of controlling an aftertreatment system having a SCR catalyst and communicating with an engine electronic control module (ECM) is provided. The method may receive a plurality of system values corresponding to NH | 02-19-2015 |
20150047319 | VEHICLE AND A METHOD OF DETERMINING A REDUCTANT STORAGE CAPACITY SET POINT OF A SELECTIVE CATALYTIC REDUCTION FILTER OF AN EXHAUST TREATMENT SYSTEM OF THE VEHICLE - A vehicle and a method of determining a reductant storage capacity set point of a selective catalytic reduction filter (SCRF) of an exhaust treatment system of a vehicle are disclosed. The method includes determining a storage estimate of a reductant inside the SCRF and determining a particulate estimate in the SCRF representative of an amount of particulate matter collected inside the SCRF. The method also includes determining a particulate correction factor from the particulate estimate and calculating, via a controller, a set point value of the reductant in the SCRF by computing together the particulate correction factor and the storage estimate to determine the reductant storage capacity set point of the SCRF. | 02-19-2015 |
20150047320 | VEHICLE AND A METHOD OF UPDATING AGING OF A SELECTIVE CATALYTIC REDUCTION FILTER OF AN EXHAUST TREATMENT SYSTEM OF THE VEHICLE - A vehicle and method of updating aging of a selective catalytic reduction filter (SCRF) of an exhaust treatment system of the vehicle are disclosed. The method includes determining a desorption rate estimate of a catalyst of the SCRF and determining an ash volume estimate representative of an amount of ash collected inside the SCRF. The method also includes determining an ash correction factor from the ash volume estimate and calculating, via a controller, a corrected desorption rate value by multiplying the ash correction factor with the desorption rate estimate to update the aging of the SCRF. | 02-19-2015 |
20150047321 | Pressurized Tank Vehicular Fluid Delivery System - Systems and methods for delivering a vehicular fluid to a component of the vehicle. A reductant delivery system of a selective catalytic reduction system delivers the vehicular fluid to the component of the vehicle. The reductant delivery system includes a compressed air source, a tank in fluid communication with the compressed air source, a dosing module in fluid communication with the tank, and a control module electrically coupled to the compressed air source. The tank may contain a diesel exhaust fluid and the dosing module is in fluid communication with the component that receives the diesel exhaust fluid. The control module regulates an amount of air pressure in the tank to deliver the vehicular fluid to the dosing module. The system omits a vehicular fluid pump such that the compressed air from the compressed air source pressurizes the dosing module with the vehicular fluid. | 02-19-2015 |
20150047322 | METHODS AND SYSTEM FOR CONTROLLING EXHAUST BACKFLOW - Various methods and systems are provided for blocking backflow of exhaust through an exhaust gas recirculation system. In one embodiment, a method comprises flowing exhaust gas through an exhaust gas recirculation (EGR) passage in a first direction from at least a first cylinder group of an engine to an intake manifold of the engine, the exhaust gas flowing in the first direction through a filter arranged in the EGR passage prior to reaching the intake manifold, and blocking flow of gas through the filter in a second, opposite direction with a mechanical one-way valve positioned in the EGR passage between the filter and the intake manifold. | 02-19-2015 |
20150047323 | MULTI-CELL STRUCTURE FOR AUTOMOTIVE CATALYST SUPPORT - An exhaust system is described including an exhaust manifold having different length runners, with an emission control device housing a plurality of catalyst bricks, at least one of which having a multi-cell density. In this way, uneven exhaust mixing may be addressed without modifying packaging of the exhaust system. | 02-19-2015 |
20150047324 | Exhaust Gas System of an Internal Combustion Engine, and Method for Preparing a Reducing Agent Which is Introduced into the Internal Combustion Engine Exhaust Gas - An exhaust gas system includes a reducing agent preparation section having a first cylindrical exhaust gas line pipe section opening approximately perpendicularly into a second exhaust gas line pipe section via an opening in a cylinder lateral surface of the second exhaust gas line pipe section. An injector unit for introducing the reducing agent into the exhaust gas is situated at the first exhaust gas line pipe section, upstream from the opening. The opening in the cylinder lateral surface of the second exhaust gas line pipe section has a larger extension in the direction of the longitudinal extent of the second exhaust gas line pipe section than transversely thereto. In a method using the reducing agent preparation section a rotating exhaust gas flow is formed within the second exhaust gas line pipe section. | 02-19-2015 |
20150047325 | DEVICE AND METHOD FOR CLEANING OF AN SCR SYSTEM - A method for cleaning an SCR system, wherein reducing agent is supplied to an exhaust flow upstream of an SCR catalyst ( | 02-19-2015 |
20150047326 | Water Injection Exhaust Treatment System - An exhaust aftertreatment system may include a reductant supply and diluent supply conduits, an injector and a control module. The reductant supply conduit includes a first valve controlling a flow of reductant through the reductant supply conduit. The diluent supply conduit includes a second valve controlling a flow of diluent through the diluent supply conduit. The injector is in fluid communication with the reductant supply conduit and the diluent supply conduit and is configured to provide fluid to an exhaust stream. The control module may control the first valve to provide a targeted amount of reductant through the injector. The control module may control the second valve to maintain a fluid flow rate through the injector that is at or above a minimum flow rate threshold of the injector based on a difference between a flow rate through the reductant supply conduit and the minimum flow rate threshold. | 02-19-2015 |
20150047327 | COMPONENT CARRIER FOR A DOSING SYSTEM - A component carrier of a dosing system including a plurality of components for injecting a urea solution into the exhaust gas flow of an internal combustion engine comprises a base plate forming the component carrier, a plurality of inner flow channels integrated into the base plate, and an inlet port and an outlet port connecting the inner flow channels with the coolant circuit of the internal combustion engine. The component carrier is heated by flowing a fluid having an elevated temperature and circulating in the coolant circuit from the inlet port to the outlet port passing through the inner flow channels and transferring the heat from the fluid to the component carrier. The components of the dosing system mounted on the component carrier and in thermal contact with the component carrier are heated by heat transfer from the heated component carrier. | 02-19-2015 |
20150059317 | SYSTEM AND METHOD FOR ENHANCING THE PERFORMANCE OF A SELECTIVE CATALYTIC REDUCTION DEVICE - A system and method is provided for enhancing the performance of an SCR device, particularly by routinely reducing the amount of reductant deposits accumulated in an exhaust gas system, when the reductant is injected at a reduced temperature. The system may include an engine, an exhaust gas system, an SCR device, an injection device, and a controller configured to execute the present method. The controller may be configured to select an initial injection rate and an initial injection temperature for the reductant; estimate the amount of accumulated reductant deposits present within the exhaust gas system; compare the amount of accumulated reductant deposits to a threshold amount of reductant deposits allowable in the exhaust gas system; and initiate a reductant deposit burn-off mode when the amount of accumulated reductant deposits is greater than the threshold amount of reductant deposits allowable in the exhaust gas system. | 03-05-2015 |
20150068192 | ENHANCED CRT ENABLEMENT BASED ON SOOT MASS STORED IN PARTICULATE FILTER - An exhaust treatment system to treat exhaust gas includes a particulate filter and a pressure sensor. The particulate filter is configured to trap soot contained in exhaust gas. The pressure sensor is configured to output a pressure signal indicative of a pressure differential of the particulate filter. The exhaust treatment system further includes a soot mass module configured to determine a soot mass. The soot mass is indicative of an amount of soot stored in the particulate filter based on the pressure differential and a soot model stored in a memory device. The exhaust treatment system further includes a continuously regenerating trap (CRT) compensation module configured to generate a variable CRT threshold. The CRT compensation module selectively outputs a CRT compensation value that modifies the soot model based on comparison between the NOx flow rate and the soot mass-based variable CRT threshold. | 03-12-2015 |
20150068193 | REGENERATION SYSTEM TO REGENERATE A PARTICULATE FILTER BASED ON CODE CLEAR DIAGNOSTIC SIGNAL - An exhaust treatment system includes a particulate filter having a filter substrate configured to trap soot contained in exhaust gas. A regeneration system is configured to perform a regeneration operation that regenerates the particulate filter by burning away soot stored in the filter substrate. A control module is in electrical communication with the regeneration system to generate a first control signal that initiates the regeneration operation based on a comparison between at least one operating condition of the exhaust treatment system and a threshold value. The control module generates a second control signal in response to detecting at least one diagnostic signal. The second control signal initiates the regeneration operation independently of the comparison. | 03-12-2015 |
20150068194 | METERING ARRANGEMENT FOR A LIQUID EXHAUST-GAS AFTERTREATMENT MEDIUM AND METERING METHOD - A metering arrangement ( | 03-12-2015 |
20150068195 | EXHAUST GAS RETREATMENT SYSTEM OF AN INTERNAL COMBUSTION ENGINE AND METHOD FOR OPERATING THE SAME - An exhaust gas retreatment system of an internal combustion engine includes a particle filter; and a sensor positioned, in a flow direction of the exhaust gas, downstream of the particle filter. The sensor is configured to measure the oxygen content and/or the NOx content in the exhaust gas downstream of the particle filter. | 03-12-2015 |
20150075135 | Method and Device for Determining the Concentration of Aerosols in Hot Gases, Particularly in Exhaust Gases of Internal Combustion Engines - For a method for determining the concentration of aerosols in hot gases, particularly in exhaust gases of internal combustion engines, the removal of volatile and semi-volatile particles by heating the exhaust gas is provided, as well as the measurement of the concentration of the aerosols, optionally in a partial flow of an optionally diluted exhaust gas flow. | 03-19-2015 |
20150075136 | AIR-ASSISTED REDUCTANT DELIVERY SYSTEM - A pump assembly ( | 03-19-2015 |
20150075137 | CATALYTIC CONVERTER STRUCTURES WITH INDUCTION HEATING - A catalytic converter assembly has a substrate body with a plurality of cells for passage therethrough of exhaust gases. Metal is located at predetermined locations in the substrate body. An electromagnetic field generator is mounted adjacent the substrate for generating a varying electromagnetic field inductively to heat the metal and so heat the substrate. | 03-19-2015 |
20150075138 | CATALYTIC CONVERTER STRUCTURES WITH ELECTROHYDRODYNAMIC HEAT AND MASS TRANSFER - A catalytic converter assembly has a ceramic substrate body with a plurality of cells for passage therethrough of exhaust gases. An emitter electrode for emitting free electrodes is mounted adjacent the substrate body for intercepting exhaust gas flowing at an upstream location of the catalytic converter. A collector electrode for collecting electrons is mounted adjacent the substrate body to intercept exhaust gas flowing at a downstream location of the catalytic converter. An energizing circuit is used to apply a high voltage between the emitter and collector to stimulate the generation of free electrons. | 03-19-2015 |
20150075139 | METHOD FOR CONTROLLING AN INJECTOR PLACED IN A MOTOR VEHICLE EXHAUST LINE - A method for controlling an injector ( | 03-19-2015 |
20150075140 | EXHAUST SYSTEM WITH A MODIFIED LEAN NOx TRAP - An exhaust system for treating an exhaust gas from an internal combustion engine is disclosed. The system comprises a modified lean NO | 03-19-2015 |
20150082771 | SYSTEM FOR DETECTING A LEAKAGE IN AN INTAKE LINE OF AN INTERNAL COMBUSTION ENGINE - A system for detecting a leakage/failure in in an intake line of an internal combustion engine comprising an intake line (IL) and an exhaust line (EL), means (HFM) for measuring or for estimating a quantity of fresh air ({dot over (m)} | 03-26-2015 |
20150089923 | EXHAUST SYSTEM INCLUDING AN EXHAUST MANIFOLD HAVING AN INTEGRATED MIXER PLATE - An exhaust system for an engine is provided herein. The exhaust system includes an emission control device and an exhaust manifold having a plurality of runners merging at a confluence section positioned upstream of the emission control device. The exhaust system further includes a mixer plate positioned in the confluence section, the mixer plate including a central opening and a plurality of louvered vents positioned axially around the central opening, the louvered vents having angled openings facing a common rotational direction. | 04-02-2015 |
20150089924 | EXHAUST GAS PROCESSING DEVICE, EXHAUST GAS PROCESSING SYSTEM, METHOD FOR CONTROLLING EXHAUST GAS PROCESSING SYSTEM, CONTROL PROGRAM, AND CYLINDRICAL TUBE - An exhaust gas processing system includes a cylindrical tube through which an exhaust gas of an engine passes, a sensor configured to detect information regarding the exhaust gas discharged from the engine, a coil antenna provided on an outer periphery of the cylindrical tube and connected to a high-frequency power supply, and a control unit configured to control output power of the high-frequency power supply. The control unit controls output power of the high-frequency power supply based on the information detected by the sensor. | 04-02-2015 |
20150089925 | DIESEL ENGINE WITH REDUCED PARTICULATE MATERIAL ACCUMULATION AND RELATED METHOD - The present invention provides a diesel engine capable of preventing a PM accumulation amount from increasing excessively. If DOC inlet exhaust gas temperature (“IEGT”) does not reach a predetermined value T0, a control unit carries out air intake amount feedback control (“AIAFC”), and a target value of intake throttling is set to a predetermined air intake amount. If the DPF regenerating processing is not started even if elapsed time reaches a predetermined value t after AIAFC is started in a state where the DOC IEGT does not reach the predetermined value T0, the control unit changes AIAFC to exhaust gas temperature feedback control (“EGTFC”). In EGTFC, the control unit changes a target value of intake throttling to a predetermined DOC IEGT T0. If application of a load exceeding a predetermined amount is detected before the DOC IEGT reaches the predetermined value T0, the control unit returns EGTFC to AIAFC. | 04-02-2015 |
20150096283 | METHOD FOR MONITORING COMPONENTS IN AN EXHAUST AFTER TREATMENT SYSTEM, AN EXHAUST AFTER TREATMENT SYSTEM, AND A CONTROLLER FOR AN EXHAUST AFTER TREATMENT SYSTEM - Components in an exhaust after treatment system (EATS) for a diesel engine are monitored by measuring heat released (QDOC) across a diesel oxidation catalyst (DOC) and heat released (QEATS) across the DOC and a diesel particulate filter (DPF) during an A Hi injection event, by calculating heat input from AHI fuel (QAHI) during performance of the AH I injection event with a fully functioning AHI nozzle, and by measuring NOX conversion efficiency (nSCR) from NOX to N2 by a selective catalytic reduction system (SCR) at a condition where a SCR is sensitive to feeding gas compositions while AHI is not in use. Malfunctioning components are identified using these measurements and calculations. | 04-09-2015 |
20150101310 | Exhaust Gas Treatment System Including an Enhanced SCR Diagnostic Unit - Embodiments of the invention include a method for performing diagnostics of a selective catalytic reduction (“SCR”) device in an exhaust gas treatment system of an internal combustion engine. The method includes monitoring an amount of sulfur in the SCR device of the exhaust treatment system and monitoring, by an SCR diagnostics module, an efficiency of the SCR device and indicating when the efficiency of the SCR device falls below an efficiency diagnostics threshold. Based on determining that the amount of sulfur in the SCR device is above a first threshold, the method includes disabling an operation of the SCR diagnostics module. | 04-16-2015 |
20150101311 | Exhaust Mixer, Emissions Cleaning Module and Method - An exhaust mixer provided may be used for mixing an additive, such as urea, in exhaust fluid flow. The exhaust mixer may be useful in reducing or preventing build-up of solid additive deposits by increasing efficiency of mixing of the additive. The exhaust mixer may be located at least partially within a mixing conduit and includes plurality of elongate mixing blades held in spaced configuration by a support. Each mixing blade may have a longitudinal axis extending along a longitudinal axis of the mixing conduit, wherein an injector module may be located upstream of the inlet of the mixing conduit. | 04-16-2015 |
20150101312 | O2 PURGE CONTROL METHOD AND VEHICLE EXHAUST SYSTEM FOR TWO TYPE CATALYSTS - An O2 purge control method for two type catalysts may include, performing, by a WCC O2 purge of a warm up catalytic converter (WCC), a sensor based WCC O2 purge logic to which a voltage of a WCC O2 sensor is applied immediately after a fuel-cut; and when the sensor based WCC O2 purge logic is completed, applying an O2ucc learning history and an O2uccReset of an O2ucc (oxygen quantity adsorbed into UCC) for an under floor catalytic converter (UCC) and performing, by any one of a factor based UCC O2 purge logic to which an engine RPM and an Fpurge of a purge oxygen suction quantity [mg] are applied and a sensor based UCC O2 purge logic to which a voltage value of an UCC O2 rear sensor is applied, an UCC O2 purge of the UCC. | 04-16-2015 |
20150101313 | Diesel Exhaust Fluid Deposit Mitigation - One form of the present application is an apparatus including an internal combustion engine structured to produce an exhaust flow, an exhaust system structured to receive the exhaust flow, and a reductant injector structured to inject reductant into a primary passage of the exhaust system upstream of a catalyst. The apparatus further includes an injector passage structured to receive a portion of exhaust upstream of the injector and further structured to flow the exhaust into the primary passage around the injector in a manner such that deposit formation is reduced. | 04-16-2015 |
20150101314 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - The invention relates to a method and an arrangement for operating an internal combustion engine. In the method a first distribution of values for at least one variable is used, the variable describing a physical property of the internal combustion engine, and over a second time period values for this variable are recorded and classified, such that a second distribution is determined. The first distribution is then compared with the second distribution such that the behavior of the internal combustion engine can be adapted on the basis thereof. | 04-16-2015 |
20150101315 | EXHAUST GAS APPARATUS AND METHOD FOR THE REGENERATION OF A NOX TRAP AND A PARTICLE FILTER - Exhaust gas apparatus for the cleaning of exhaust gas where the exhaust gas apparatus comprises an exhaust conduit section which is formed with at least two separate flow paths. Each flow path is provided with a particle filter for the removal of particulate matter from the exhaust gas, an NOx trap for the removal of NOx from the exhaust gas. The exhaust gas apparatus further comprises at least one cold flame vaporizer in which fuel is partially oxidized in preheated air to form a cold flame gas where the cold flame vaporizer is arranged in fluid communication with each of the flow paths in the exhaust conduit section such that the cold flame gas can flow through the particle filter and the NOx trap, and valve means for controlling the flow of cold flame gas from the cold flame vaporizer to each flow path in the exhaust conduit section. Thereby, both the particle filter and the NOx trap in at least one of the flow paths can be regenerated in a single operation. There is also provided a method for regenerating cleaning means for exhaust gas where the cleaning means comprises an NOx trap and possibly a particle filter. | 04-16-2015 |
20150107226 | GASOLINE DITHERING FOR SPARK-IGNITED GASEOUS FUEL INTERNAL COMBUSTION ENGINE - An internal combustion engine system of the present application includes a spark-ignited internal combustion engine that is powered by a gaseous fuel. The engine system also includes an exhaust system that is in exhaust gas receiving communication with the internal combustion engine. The exhaust system includes an exhaust treatment component. Additionally, the exhaust system includes a liquid fuel injection system in liquid fuel injecting communication with the exhaust system to inject liquid fuel into exhaust gas upstream of the exhaust treatment component. | 04-23-2015 |
20150107227 | METHOD FOR ENRICHING EXHAUST GASES WITH UNBURNT HYDROCARBON - In a method for enriching the exhaust gases of a combustion engine with unburnt hydrocarbon engine operating conditions are monitored and in-cylinder post injection of unburnt hydrocarbon into one predetermined cylinder of at least two cylinders connected to an exhaust manifold is performed when the monitored engine operating conditions equal predetermined engine operating conditions. The predetermined engine operating conditions are set for resulting in a substantially zero flow of the post-injected hydrocarbon to an EGR circuit for the specific design of the engine in operation. | 04-23-2015 |
20150107228 | POLLUTANT ABATEMENT SYSTEM FOR GASOLINE VEHICLES - The present invention is directed to a pollutant abatement system for vehicles propelled by a gasoline combustion engine, in particular a gasoline direct injection engine (GDI). In addition, this invention is concerned with a process of mitigating noxious compounds in the exhaust of such an engine efficiently by applying the inventive abatement system to fulfill future legislative exhaust regulations. | 04-23-2015 |
20150107229 | METHOD AND DEVICE FOR REDUCING THE EMISSION OF NITROUS OXIDE - In a method for regeneration of nitrogen oxide storage catalytic converters in the exhaust gas tract of a gasoline engine assigned an exhaust aftertreatment system in the form of a Y system including two three-way catalytic converters, two downstream nitrogen oxide storage catalytic converters, one shared catalytic converter for selective catalytic reduction, and a rear nitrogen oxide storage catalytic converter, a first part of the exhaust gas in the first exhaust bank is set to rich and a second part of the exhaust gas in the second exhaust bank is set to lean in a first regeneration phase and subsequently, the second part of the exhaust gas in the second exhaust bank is set to rich and the first part of the exhaust gas in the first exhaust bank is set to lean in a second regeneration phase. | 04-23-2015 |
20150113947 | SYSTEMS AND METHODS FOR THERMAL MANAGEMENT OF AFTERTREATMENT SYSTEM COMPONENTS - An exhaust aftertreatment system includes an oxidation catalyst and a selective catalytic reduction (SCR) catalyst disposed in an exhaust stream of an internal combustion engine. A stay warm thermal management strategy is employed after warm-up of the aftertreatment system is complete to maintain the aftertreatment system above a temperature providing a desired performance threshold of one or more components of the aftertreatment system, such as the oxidation catalyst or the SCR catalyst. | 04-30-2015 |
20150113948 | METHOD AND SYSTEM FOR CONTROL OF AN EGR VALVE DURING LEAN OPERATION IN A BOOSTED ENGINE SYSTEM - Methods and systems are provided for reducing EGR estimation errors during lean engine operating conditions. During lean engine operation, EGR is disabled if the estimated exhaust air-fuel ratio becomes leaner than a lean threshold. The lean threshold is adjusted based on an upper limit of EGR errors that may be tolerated by the engine at a given engine speed and load. | 04-30-2015 |
20150113949 | SELECTIVELY TRAPPING AND STORING SO3 IN AN EXHAUST GAS EFFLUENT - Systems, apparatus, and methods for selectively, preferentially, and/or actively removing or trapping SO | 04-30-2015 |
20150113950 | METHOD AND APPARATUS FOR DETECTING SELECTIVE CATALYTIC REDUCTION INJECTOR OPENING TIME - A method for detecting an opening time of a valve, includes receiving a valve current profile of the valve and processing the valve current profile using at least a slope reflection detector to determine a status of the valve based on an output of the slope reflection detector. | 04-30-2015 |
20150113951 | SELECTIVE CATALYST REDUCTION FILTER WASHCOAT THICKNESS AMMONIA COMPENSATION SYSTEM - An exhaust treatment system includes a selective catalyst reduction filter (SCRF) device, a reductant delivery system, and a reductant storage module. The SCRF device includes a filter portion having a washcoat disposed thereon that defines a washcoat thickness (WCT). The reductant delivery system is configured to inject a reductant that reacts with the washcoat. The reductant storage module is in electrical communication with the reductant delivery system to determine a reductant setpoint that controls the amount of reductant injected from the reductant delivery system. The exhaust treatment system further includes a WCT compensation module configured to electrically communicate a WCT compensation value to the reductant storage module. The reductant storage module adjusts the setpoint according to the WCT compensation value such that the amount of ammonia that slips from the SCRF device is reduced as compared to the first setpoint. | 04-30-2015 |
20150113952 | PARTICULATE MATTER SENSOR REGENERATION - The present disclosure relates to a controller apparatus for regenerating a particulate matter sensor. The controller apparatus includes a sensing module configured to detect a soot loading on a particulate matter sensor and generate a regeneration request indicating a desired regeneration temperature and a heating module configured to receive the regeneration request and send a heating command signal to a heating element based on the regeneration request. The controller apparatus further includes an electrical resistance module configured to detect an electrical resistance in the heating element and determine an actual temperature of the heating element and a temperature feedback module configured to modify the heating command signal according to the difference between the desired regeneration temperature and the actual temperature. The present disclosure also includes a related method and system. | 04-30-2015 |
20150113953 | SELF-DIAGNOSING METHOD FOR DIAGNOSING A SCR SYSTEM - A self-diagnosing method for diagnosing a selective catalytic reduction (SCR) system of a vehicle that includes an internal combustion engine. An SCR system is arranged downstream of the engine, and the SCR system includes at least one exhaust gas sensor that is sensitive to nitrogen oxides (NOx) gas. The method includes a first diagnosing sequence (S1) of ensuring that the vehicle is in a stationary state, controlling the engine to operate in a high NOx output engine operating state and in a low NOx output engine operating state, registering an output signal of the at least one exhaust gas sensor when the engine operates in each of the high NOx output engine operating state and low NOx output engine operating state, and diagnosing NOx measurement performance of the at least one exhaust gas sensor on the basis of the registered sensor output. | 04-30-2015 |
20150113954 | OPERATING SYSTEM FOR CATALYST OF VEHICLE AND METHOD THEREOF - A system and a method for operating a catalyst of a vehicle may include a catalyst configured to purify an exhaust gas of a vehicle engine, and a controller configured to perform a detection of internal temperature of the catalyst, wherein the controller detects the internal temperature of the catalyst by applying a change of precious metal loading of the catalyst to an internal temperature model of the catalyst. | 04-30-2015 |
20150113955 | METHOD AND DEVICE FOR REDUCING THE EMISSIONS OF AN INTERNAL COMBUSTION ENGINE - A method for reducing the pollutant emissions in the exhaust gas in a start/catalytic converter heating phase of an internal combustion engine featuring externally supplied ignition and having at least one catalytic converter in an exhaust gas tract of the internal combustion engine, and for adapting a catalytic converter heating strategy to suitable state variables of the internal combustion engine and the catalytic converter as well as to the fuel quantity, the aging state and ambient conditions. The internal combustion engine is operated in a first phase of the start/catalytic converter heating phase using a lean air-fuel mixture in a range between a lambda value of 1.05 and at a lean misfire limit of the internal combustion engine that lies at a higher lambda value, and/or in a second phase of the start/catalytic converter heating phase, initially using a rich air-fuel mixture. | 04-30-2015 |
20150113956 | METHOD FOR METERING A REDUCING AGENT INTO AN EXHAUST-GAS TREATMENT DEVICE, EXHAUST-GAS TREATMENT DEVICE AND MOTOR VEHICLE - A method for metering reducing agent to an exhaust gas treatment device having a feed point and an SCR catalytic converter converting nitrogen oxide compounds in the exhaust gas, includes at least: a) calculating the following target conversion rates indicating what fraction of the nitrogen oxide compounds in the exhaust gas can be converted by the catalytic converter: a first rate determined from the power output of an internal combustion engine; a second rate determined from the mass flow of nitrogen oxide compounds in purified exhaust gas; and a third rate determined from a ratio of quantities of nitrogen oxide compounds upstream and downstream of the catalytic converter; b) selecting the lowest rate; c) determining the dosing quantity of reducing agent for the selected rate; and d) dosing the determined dosing quantity into the exhaust gas treatment device. An exhaust-gas treatment device and a motor vehicle are also provided. | 04-30-2015 |
20150113957 | METHOD FOR DETERMINING REDUCING AGENT SLIPPAGE AND MOTOR VEHICLE EMPLOYING THE METHOD - A method for determining reducing agent slippage from an exhaust-gas treatment device includes determining a difference between sensor signals of a second nitrogen oxide sensor and of a device for determining a nitrogen oxide compound quantity upstream of an SCR catalytic converter in an exhaust-gas flow direction; determining a controlling deviation from the difference and a target value of a controlling element; determining a gradient of an integral controlling component; and identifying reducing agent slippage if the controlling deviation exceeds a first threshold value and the gradient exceeds a second threshold value. The method and a corresponding device make it possible to reliably identify reducing agent slippage so that a very fast controlling element can be used. | 04-30-2015 |
20150113958 | Method for feeding reducing agent and motor vehicle and stationary installation in which the method is performed - A method for feeding reducing agent to an exhaust gas mass flow in an exhaust gas treatment device provides a reducing agent feed port, a storage catalytic converter storing reducing agent and an SCR catalytic converter for selective catalytic reduction of nitrogen oxygen compounds in exhaust gas. A first dosing strategy is followed, loading of the storage catalytic converter with reducing agent is monitored and a first target conversion rate is determined based on current loading. Reducing agent is fed according to the first target conversion rate. A current conversion rate obtained with the SCR catalytic converter is determined. The current conversion rate is compared to the first target conversion rate and any deviation is registered. A further dosing strategy, not considering the loading of the storage catalytic converter, is used if the deviation exceeds a first threshold value. A motor vehicle and a stationary installation are also provided. | 04-30-2015 |
20150121847 | EXHAUST THROTTLING FOR CABIN HEATING - Embodiments for heating a vehicle cabin are disclosed. In one example, a method for heating a vehicle cabin comprises closing an exhaust throttle while diverting at least a portion of throttled exhaust gas through an exhaust gas recirculation (EGR) cooler coupled upstream of the throttle, and transferring heat from the EGR cooler to a heater core configured to provide heat to the vehicle cabin. In this way, exhaust heat may be directly routed to the cabin heating system. | 05-07-2015 |
20150121848 | EXHAUST THROTTLING FOR CABIN HEATING - Embodiments for heating a vehicle cabin are disclosed. In one example, a method for an engine comprises pumping coolant from a coolant reservoir to an exhaust component and then to a heater core, the coolant heated by the exhaust component, and during engine warm-up conditions, adjusting a flow rate of coolant into a heater core to maximize heat transfer to a vehicle cabin. | 05-07-2015 |
20150121849 | ENGINE EMISSIONS CONTROL SYSTEM USING ION TRANSPORT MEMBRANE - The engine emissions control system using an ion transport membrane incorporates an ion transport membrane unit into a closed, recirculating intake and exhaust system in the engine. The unit has a housing defining an air intake channel separated from an exhaust gas recirculation channel by an ion transport membrane. The membrane is permeable to oxygen, but is impermeable to nitrogen, water and carbon dioxide. Oxygen drawn from ambient air in the air intake channel is transported through the membrane to enrich the flow of exhaust gases in the exhaust gas recirculation channel, which is transported through a conduit to the engine intake for combustion of hydrocarbon fuel. The oxygenated exhaust gases may include uncombusted fuel or incomplete combustion products. Exhaust and intake accumulators may smooth the gas pulses. The accumulated or excess carbon dioxide and water in the exhaust is recovered from the system into onboard storage tanks or containers. | 05-07-2015 |
20150121850 | INJECTOR CORROSION ISOLATION SEAL - A fluid injector includes a valve assembly constructed and arranged to control flow of fluid from an inlet to an outlet of the injector. A metal housing surrounds at least a portion of the valve assembly. A plastic body is molded over at least a portion of the housing. A distal end of the body defines an integral stepped portion extending from the body. A carrier surrounds at least the distal end of the body. A seal member is in contact with at least the stepped portion and a surface of the carrier to prevent liquid from entering a space between the housing and the body. | 05-07-2015 |
20150121851 | TRANSIENT CONTROL OF EXHAUST GAS RECIRCULATION SYSTEMS THROUGH MIXER CONTROL VALVES - Systems, methods and techniques for exhaust gas recirculation are provided. The system includes controlling the mixing of exhaust flow from at least one cylinder of an engine with air in an air intake system prior to combustion in response to an EGR fraction deviation condition. The exhaust flow from the at least one cylinder is accumulated prior to mixing and distributed into the intake air system in a controlled manner to mitigate or prevent the EGR flow from deviating from an expected EGR fraction. | 05-07-2015 |
20150121852 | TECHNIQUES FOR RAISING EXHAUST TEMPERATURES - One embodiment is a unique strategy for raising exhaust temperatures which includes deactivating a first group of cylinders while maintaining a second group of cylinders in a combustion mode and injecting fuel into each of one of the second group of cylinders not earlier than 2 degrees before top dead center (TDC). The strategy also includes passing fuel rich exhaust from the second group of cylinders into an exhaust pathway and oxidizing at least a portion of the fuel rich exhaust in the exhaust pathway. In one form, the oxidizing occurs independent of any catalytic influence. Other embodiments include unique methods, systems, and apparatus for raising exhaust temperatures and/or regenerating one or more components of an aftertreatment system. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings. | 05-07-2015 |
20150121853 | ENGINE SYSTEM FOR INCREASING AVAILABLE TURBOCHARGER ENERGY - An engine system for a machine is disclosed. The engine system may have an intake manifold configured to direct air into a donor cylinder and a non-donor cylinder of an engine. The engine system may also have a first exhaust manifold configured to direct exhaust from the non-donor cylinder to the atmosphere. The engine system may also have a second exhaust manifold configured to receive exhaust from the donor cylinder. The engine system may further have a control valve configured to selectively direct a first amount of exhaust from the second exhaust manifold to the intake manifold. In addition, the engine system may have an orifice configured to allow a second amount of exhaust to flow from the second exhaust manifold to the first exhaust manifold. | 05-07-2015 |
20150128564 | METHOD AND SYSTEM FOR REDUCTANT INJECTOR DEGRADATION - Various systems and methods for detecting exhaust reductant injector degradation based on an exhaust NO | 05-14-2015 |
20150128565 | METHOD AND SYSTEM FOR NOX SENSOR DEGRADATION - Various systems and method for detecting exhaust NO | 05-14-2015 |
20150128566 | EXHAUST GAS PURIFICATION SYSTEM AND METHOD FOR PURIFYING EXHAUST GAS - A previous-stage oxidation catalyst device, a Diesel Particulate Filter (DPF) device, a turbine of a turbocharger, a previous-stage NOx selective reduction catalyst device, and a subsequent-stage NOx selective reduction catalyst device in an exhaust system of an internal combustion engine in this order from an exhaust port side. An ammonia-based solution feeder is on an inlet side or outlet side of the DPF device. The previous-stage NOx selective reduction catalyst device is a rare earth composite oxide catalyst, and the subsequent-stage NOx selective reduction catalyst device is a zeolite catalyst. The NOx removal rate is improved in wide ranges from low to high temperatures and to high flow rates, and the temperature of the DPF device is kept high to increase the time and frequency of continuous regeneration, thereby reducing the frequency of forced regeneration and an amount of discharge of CO | 05-14-2015 |
20150128567 | CATALYST PROTECTION DEVICE AND CATALYST PROTECTION METHOD FOR INTERNAL COMBUSTION ENGINE - A catalyst protection device includes: a catalyst provided in an exhaust system of an internal combustion engine and purifying exhaust gas; a bed temperature acquisition unit acquiring a current bed temperature of the catalyst; a base increase value calculation unit calculating a base increase value that is a base value of an increase value of a fuel injection amount injected by a fuel injection valve included in the internal combustion engine in order to cool the catalyst when the current bed temperature exceeds a predetermined determination value; a compensator acquiring a corrected increase value by correcting the base increase value using a reduction coefficient that is calculated by incorporating a value of a target bed temperature set to a value strictly lower than the determination value; and an injection amount increasing unit selecting any one of the base increase value and the corrected increase value. When catalyst protection is required, the fuel increase value is therefore optimized to reasonable values, while not being reduced too much. | 05-14-2015 |
20150128568 | METHOD FOR DETERMINING IF AN INJECTOR IS IN A BLOCKED STATE - A method for determining if an injector ( | 05-14-2015 |
20150128569 | SYSTEMS AND TECHNIQUES FOR HEATING UREA INJECTION SYSTEMS - A reductant delivery system is provided for delivery of reductant to an engine exhaust aftertreatment system that is heated during cold temperature conditions. A heat exchange fluid flows through a heat exchange circuit that provides a flow path from the heat source to the doser, from the doser to the reductant storage tank, and from the reductant storage tank to the heat source. A control valve controls the flow of the heat exchange fluid in the heat exchange circuit so that at least one heat exchange cycle includes a circulation period that increases the temperature of the reductant in the doser and storage tank and a termination period where circulation is stopped until reductant temperature in the doser reaches a lower limit. | 05-14-2015 |
20150128570 | EXHAUST GAS PURIFICATION APPARATUS, AND METHOD FOR THAWING LIQUID REDUCING AGENT OR PRECURSOR THEREOF - An exhaust gas purification apparatus includes: a reduction catalyst converter that reduces and purifies nitrogen oxides in exhaust gas; a tank that stores a liquid reducing agent or precursor thereof; and an injection nozzle that injects the liquid reducing agent or precursor thereof stored in the tank on an exhaust gas upstream side of the reduction catalyst converter. Some of the exhaust gas flowing through an exhaust pipe is diverted to the tank by a bypass pipe, to cause an exchange of heat between the diverted exhaust gas and the liquid reducing agent or precursor thereof stored in the tank, thereby thawing the liquid reducing agent or precursor thereof frozen in the tank. | 05-14-2015 |
20150128571 | EXHAUST GAS AFTERTREATMENT BYPASS SYSTEM AND METHODS - A method for protecting an exhaust aftertreatment system of an internal combustion engine from deterioration by selectively diverting exhaust gasses from the engine away from a component of the exhaust aftertreatment system includes assessing a status of an operating condition associated with a physical condition of the component of the internal combustion engine. The status of the operating condition is compared with a threshold value that corresponds with deterioration of the physical condition of the component. A valve upstream of the component is moved to a first position to open a bypass fluid path directing exhaust gasses around the component when the status of the operating condition meets the threshold value to reduce deterioration of the component. The valve is moved to a second position to close the bypass fluid path thereby directing exhaust gasses to the component when the status of the operating condition does not meet the threshold. | 05-14-2015 |
20150135679 | EMISSIONS CONTROL IN DIESEL ENGINES - An exhaust system is configured with a diesel oxidation catalyst that receives first exhaust gases from a diesel engine, a diesel particulate filter that receives second exhaust gases from the diesel oxidation catalyst. A first sensor in the exhaust system determines first exhaust gases data and transmits the first exhaust gases data to a controller while a second sensor determines second exhaust gases data and transmits the second exhaust gases data to the controller. The controller estimates unmeasured exhaust gases data based on the first exhaust gases data and the second exhaust gases data and determines when to initiate a regeneration cycle for the diesel particulate filter. | 05-21-2015 |
20150135680 | THERMAL MANAGEMENT FOR REGENERATING AN AFTERTREATMENT DEVICE - A system and method for regeneration of an aftertreatment component are described. The disclosed method can employ any one or combination of operating modes that obtain a target condition of the exhaust gas to support or initiate regeneration of the aftertreatment device. | 05-21-2015 |
20150135681 | LEAN NOX TRAP DESULFATION PROCESS - A process for desulfation of a NOx adsorber in a diesel internal combustion engine exhaust system is disclosed, which comprises: determining an amount of post fuel (Q | 05-21-2015 |
20150135682 | CATALYST PROTECTION DEVICE AND CATALYST PROTECTION METHOD FOR INTERNAL COMBUSTION ENGINE - A catalyst protection device includes: a catalyst provided in an exhaust system of an internal combustion engine; a bed temperature acquisition unit that acquires a bed temperature for each of a plurality of regions of the catalyst distributed in an exhaust gas flow direction; and a fuel injection unit that determines for each of the regions whether an increase in fuel injection amount is required on the basis of the corresponding bed temperature acquired by the bed temperature acquisition unit, that calculates an increase in fuel injection amount for each region and that injects fuel of an amount including the sum of the calculated increase values. | 05-21-2015 |
20150143798 | SYSTEM AND METHOD OF PURIFYING EXHAUST GAS - A system of purifying exhaust gas may include an engine including an injector, a lean NOx trap (LNT) adapted to absorb nitrogen oxide (NOx) contained in the exhaust gas at a lean air/fuel ratio, to release the absorbed nitrogen oxide at a rich air/fuel ratio, and to reduce the nitrogen oxide contained in the exhaust gas or the released nitrogen oxide, a dosing module adapted to inject reducing agent into the exhaust gas, a selective catalytic reduction catalyst on a diesel particulate filter (SDPF) adapted to trap particulate matter and to reduce the nitrogen oxide using the reducing agent injected through the dosing module, and a controller performing denitrification (DeNOx) using the LNT when temperature of the exhaust gas may be lower than transient temperature, and performing denitrification using the SDPF when the temperature of the exhaust gas may be higher than or equal to the transient temperature. | 05-28-2015 |
20150143799 | SYSTEM AND METHOD OF DEFULFURIZING LEAN NOx TRAP - A system of dusulfurizing an LNT may control desulfurization of the LNT provided in an apparatus of purifying exhaust gas, in which the LNT may be adapted to absorb nitrogen oxide (NOx) contained in the exhaust gas at a lean air/fuel ratio and to release the absorbed nitrogen oxide and reduce the nitrogen oxide contained in the exhaust gas or the released nitrogen oxide at a rich air/fuel ratio and the apparatus of purifying exhaust gas may further include a particulate filter trapping particulate matter contained in the exhaust gas as soot and regenerated by burning the trapped soot when a regeneration condition is satisfied, and a controller controlling desulfurization of the LNT and regeneration of the particulate filter. | 05-28-2015 |
20150143800 | METHOD PERTAINING TO AN SCR SYSTEM AND AN SCR SYSTEM - A method pertaining to an SCR system wherein a reducing agent is provided in an exhaust gas stream from an engine ( | 05-28-2015 |
20150292379 | CLEANING SYSTEM AND METHOD FOR REDUCTION OF SOX IN EXHAUST GASES - A cleaning system for reducing SOx and particulate matter in exhaust gases from a marine combustion engine, burner or boiler. The cleaning system comprises first and second scrubber process loops having first and second scrubbers, respectively, and first and second water circulation tanks, respectively. Water from the first tank is evaporated to water vapor inside the first scrubber by contact with the exhaust gases, whereby the water vapor and the exhaust gases form humid exhaust gases. The humid exhaust gases are transferred to the second scrubber, wherein water from the second tank condenstaes the water vapor in the humid exhaust gases. A reflux of water from the second scrubber process loop to the first scrubber process loop is provided. At least 60% and more preferred at least 90% of a total amount of alkaline agent supplied to the cleaning system is supplied to the second scrubber process loop. | 10-15-2015 |
20150292381 | Reducing Agent Metering System with Leak Monitoring - The invention relates to a reducing agent metering system for injecting a reducing agent into the exhaust gas stream of a combustion engine for selective catalytic reduction, with a feed pump, by means of which reducing agent is conveyed from a reducing agent tank via a delivery line and is introduced via at least one nozzle into the exhaust gas stream of the combustion engine, whereby the delivery line is formed by a hose ( | 10-15-2015 |
20150292383 | EXHAUST AFTERTREATEMENT SYSTEM WITH CATALYTIC DEACTIVATION MONITORING - A system includes a controller. The controller is configured to monitor a catalytic activity within an ASC assembly that converts ammonia (NH | 10-15-2015 |
20150292385 | METHOD AND SYSTEM FOR CONTROLLING THE OPERATION OF A SYSTEM FOR STORING AND INJECTING AN ADDITIVE INTO THE EXHAUST GASES OF AN ENGINE - A method for managing operation of a component of a system for storing and injecting an additive into exhaust gases of a combustion engine. The system includes a container for storing the additive and the method includes: obtaining an instantaneous measurement of concentration of additive and/or an instantaneous measurement of alkalinity of the additive and/or an instantaneous measurement of the temperature inside the container, by one or a plurality of measurement sensors mounted inside the container; determining reducing power of the additive based on the instantaneous measurement of concentration of additive and/or an instantaneous measurement of the alkalinity of the additive and/or temperature inside the container; generating a control signal, based on the defined reducing power; transmitting the generated control signal to the component. | 10-15-2015 |
20150292388 | EXHAUST AFTER-TREATMENT SYSTEM - An engine having an after-treatment system for reducing emissions from an exhaust stream includes an intake manifold and a plurality of cylinders coupled to the intake manifold. The plurality of cylinders includes a first set of cylinders and a second set of cylinders. Further, the engine includes a first exhaust manifold coupled to the first set of cylinders and a second exhaust manifold coupled to the second set of cylinders. The engine further includes an after-treatment system coupled to the first exhaust manifold. The first exhaust manifold further includes an end portion disposed downstream relative to the after-treatment system. The end portion of the first exhaust manifold is coupled to a first portion of the second exhaust manifold via a pipe. | 10-15-2015 |
20150292425 | EXHAUST GAS PURIFICATION SYSTEM AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification system with a diesel particulate filter in an exhaust passage of an internal combustion engine. A surface filtration cake layer formation enhancement control or a particulate matter generation amount reduction control is temporarily performed immediately after a forced regeneration treatment on the diesel particulate filter. The system and a method are directed to a particulate matter slip-through phenomenon in which the particulate matter slip-through amount temporarily increases immediately after particulate matter re-combustion in a forced regeneration treatment on the diesel particulate filter. The diesel particulate filter is disposed in the exhaust passage of the internal combustion engine and reduces the total amount of particulate matter emitted to the atmosphere immediately after the particulate matter re-combustion in the forced regeneration treatment on the diesel particulate filter. | 10-15-2015 |
20150308312 | OCTANE SEPARATION SYSTEM AND OPERATING METHOD - An engine method, comprising delivering high octane fuel to a high octane fuel tank and delivering low octane fuel to a low octane fuel tank and injecting atmospheric air into an exhaust system for secondary air injection in response to delivering low octane fuel to an engine. | 10-29-2015 |
20150308317 | CONTROL METHOD FOR REDUCING AGENT SUPPLY APPARATUS AND REDUCING AGENT SUPPLY APPARATUS - To provide a reducing agent supply apparatus that makes it hard to refill the pump side with a liquid reducing agent upon completion of the suck back control of the liquid reducing agent and a method for control the reducing agent supply apparatus. | 10-29-2015 |
20150315033 | AMMONIA GAS GENERATOR, METHOD FOR PRODUCING AMMONIA AND USE OF THE SAME FOR REDUCING NITROGEN OXIDES IN EXHAUST GASES - An ammonia gas generator for producing ammonia from a solution of an ammonia precursor substance, comprising a catalyst unit that comprises a catalyst for the decomposition and/or hydrolysis of ammonia precursor substances into ammonia and a mixing chamber provided upstream of the catalyst; an injection device for injecting the solution of the ammonia precursor substance into the mixing chamber; at least one inlet for the carrier gas; and an outlet for the formed ammonia gas, said ammonia gas generator also comprising a perforated disc. | 11-05-2015 |
20150315945 | METHOD OF OPERATING A DIESEL ENGINE AND DIESEL ENGINE ARRANGEMENT HAVING PLURAL OPERATING MODES - A method is provided of operating a diesel engine having an exhaust after treatment system (EATS) including one or more apparatus for controlling exhaust NOX levels, the engine including a plurality of systems and components, at least some of which systems and components are adapted to be set to one or more control setpoints for one or more base actuators of the engine. The method includes establishing a plurality of engine operating modes, each operating mode differing from any other operating mode with respect to at least one control setpoint, for each operating mode, mapping fuel economy versus NOX levels exiting the EATS. provided | 11-05-2015 |
20150315952 | METHOD, SYSTEM, AND APPARATUS FOR DIAGNOSING AN EXHAUST AFTERTREATMENT COMPONENT - An apparatus includes an engine output module that determines an engine output power parameter for an engine. The apparatus includes an output power threshold module that determines if the engine output power parameter is below an output power threshold. The apparatus includes a NOx module that determines a nitrogen oxide (“NOx”) efficiency of a selective catalytic reduction (“SCR”) system in response to the output power threshold module determining that the determined engine output power parameter is below the output power threshold. The SCR system is in exhaust receiving communication with the engine. The apparatus includes a NO | 11-05-2015 |
20150315986 | NATURAL GAS ENGINE AND OPERATION METHOD FOR NATURAL GAS ENGINE - A natural gas engine equipped with a mechanism that introduces exhaust gas into a cylinder during an intake stroke, and in which an amount of diesel fuel injected into a cylinder is set to a diesel fuel amount for idling condition across an entire operating region of an engine, engine output is increased or decreased by increasing or decreasing an amount of a natural gas fuel, and fuel injection of the diesel fuel into a cylinder is performed using multi-injection in a high load region in which the accelerator opening degree is greater than a preset first opening degree. | 11-05-2015 |
20150316004 | Method for Operating Motor Vehicle Internal Combustion Engine - A method for operating a motor vehicle internal combustion engine that has an exhaust tract with an exhaust gas purification unit acting catalytically and/or by filtration with which combustion air supplemented by exhaust gas diverging from the exhaust tract is fed to the combustion chambers of the internal combustion engine by exhaust gas branching off from the exhaust tract at a total exhaust gas recirculation rate. The total exhaust gas recirculation rate has a low-pressure proportion diverging downstream from the exhaust gas purification unit and a high-pressure proportion diverging upstream from an exhaust gas turbocharger turbine arranged in the exhaust tract. An essentially decreasing low pressure proportion is set with at least approximately the same operating points of the internal combustion engine with an increasing operating period of the exhaust gas purification unit. | 11-05-2015 |
20150330274 | COMBUSTION GAS COOLING APPARATUS, DENITRATION APPARATUS INCLUDING THE COMBUSTION GAS COOLING APPARATUS, AND COMBUSTION GAS COOLING METHOD - A fuel gas cooling apparatus includes a cooling duct which causes a cooling gas to flow out into a mixing duct, and a difference of maximum dimensions in a height direction of a flow inlet and a flow outlet with respect to a passage length of the mixing duct is smaller than a difference of maximum dimensions in the height direction of a flow inlet and a flow outlet with respect to a passage length of an expanded duct, or a difference of maximum dimensions in a width direction of the flow inlet and the flow outlet with respect to the passage length of the mixing duct is smaller than a difference of maximum dimensions in the width direction of the flow inlet and the flow outlet with respect to the passage length of the expanded duct. | 11-19-2015 |
20150330276 | INTERNAL COMBUSTION ENGINE - An internal combustion engine, wherein an exhaust purification catalyst ( | 11-19-2015 |
20150330277 | AFTERTREATMENT THERMAL MANAGEMENT VIA CLUTCH ASSEMBLY - A vehicle system comprising: an engine; an aftertreatment system that receives exhaust gas from the engine; a clutch assembly; and a controller configured to direct adjusting slippage of the clutch assembly based on a first temperature that is selected from the group consisting of a temperature of the aftertreatment system and an expected temperature of the aftertreatment system. | 11-19-2015 |
20150330278 | INCREASED EXHAUST TEMPERATURE WARM-UP FOR A RAPID LIGHT-OFF OF A CLOSE-COUPLED DIESEL OXIDATION CATALYST - A method is provided for generating rapid light-off for a diesel oxidation catalyst (DOC) close-coupled to a compression-ignition engine. The engine includes an intake passage in fluid communication with a combustion chamber, a throttle for controlling a flow of intake air through the intake passage, and an exhaust passage configured to channel an exhaust gas from the combustion chamber to the DOC. The method includes starting the engine to commence a warm-up thereof and regulating the throttle to restrict supply of the intake airflow to the combustion chamber. The method additionally includes injecting a predetermined amount of fuel into the combustion chamber during the engine's exhaust cycle such that the injected fuel is carried by the exhaust gas and burned in the exhaust passage. Regulating the throttle and injecting fuel during the warm-up of the engine together increase temperature of the exhaust gas for rapid light-off of the close-coupled DOC. | 11-19-2015 |
20150337700 | COMBUSTION GAS COOLING APPARATUS, DENITRATION APPARATUS HAVING THE COMBUSTION GAS COOLING APPARATUS, AND COMBUSTION GAS COOLING METHOD - A combustion gas cooling apparatus includes a cooling duct from which a cooling gas at a temperature lower than the temperature of a combustion gas flows out into a mixing duct to form a mixed gas in which the combustion gas and the cooling gas are mixed. The cooling duct has cooling gas flow inlets into which the cooling gas flows, a plurality of cooling gas outflow apertures through which the cooling gas having flowed into the cooling gas flow inlets flows out into the mixing duct, and distribution passages through which the cooling gas having flowed into the cooling gas flow inlets is distributed to the plurality of cooling gas outflow apertures. | 11-26-2015 |
20150337703 | Electric Heating Assisted Passive and Active Regeneration for Efficient Emission Controls of Diesel Engines - A method of heating an exhaust gas in an exhaust aftertreatment system by selecting a heating mode between different heating modes based on an engine load and a status of a component of the exhaust aftertreatment system. The method includes heating the exhaust gas by operating the electric heater in the selected heating mode and heating the exhaust gas to reduce an exhaust temperature gradient across the exhaust conduit. | 11-26-2015 |
20150337706 | METHOD OF EXHAUST GAS AFTERTREATMENT - A method of exhaust gas aftertreatment of an exhaust gas of an internal combustion engine includes pre-treating the exhaust gas pre-treated by using a thermoreactor to catalytically oxidize the exhaust gas. Preferably, the exhaust gas is catalytically oxidized in the thermoreactor. | 11-26-2015 |
20150337709 | EXHAUST GAS PROCESSING APPARATUS AND METHOD - An apparatus and a method for processing exhaust gas are provided. The apparatus includes a lean NOx trap (LNT), a selective catalytic reduction (SCR) catalyst, and an oxygen storage catalyst containing an oxygen storage material and a precious metal sequentially disposed along an exhaust gas flow direction. The apparatus also includes a front lambda sensor disposed upstream of the LNT, a rear lambda sensor disposed downstream of the oxygen storage catalyst, and a temperature sensor configured to measure a temperature of exhaust gas. | 11-26-2015 |
20150337710 | LOCOMOTIVE AND TRANSIT SYSTEM EFFICIENCY AND EMISSIONS IMPROVEMENTS - A system includes a prime engine connected to a prime engine exhaust stack that receives prime engine exhaust, a mixing duct section connected to the prime engine exhaust stack, a head-end power (HEP) generator connected to an HEP generator exhaust pipe that receives HEP generator exhaust, a single urea injector, and a selective catalytic reduction (SCR) system. The HEP generator exhaust pipe is connected to the mixing duct section, and the single urea injector injects urea into the HEP generator exhaust pipe upstream of the mixing duct section. The HEP generator exhaust and prime engine exhaust merge in the mixing duct section to form a merged exhaust that is received by the SCR system. | 11-26-2015 |
20150337750 | SYSTEMS AND METHODS FOR IMPROVING CATALYST DIAGNOSTICS IN THE PRESENCE OF SENSOR DEGRADATION - Systems and methods for diagnosing operation of a catalyst are presented. In one example, threshold limits for catalyst variables are adjusted in response to attributes of a catalyst monitor sensor that may vary with sensor age. The catalyst variables may provide insight into whether or not the catalyst is degraded or operating as intended. | 11-26-2015 |
20150345354 | EXHAUST AFTERTREATEMENT SYSTEM INJECTOR AND CONTROL - In one aspect, an injector assembly for injecting a fluid into an exhaust aftertreatment system is provided. The injector assembly includes a housing having an outlet orifice and an inner wall defining a passageway, the passageway fluidly coupled to the outlet orifice and configured to supply the fluid to the outlet orifice, and a valve having a longitudinal axis. The valve is oriented within the passageway and configured to translate along the longitudinal axis between a first position and a second position. A downstream end of the valve includes a tapered wall oriented at a first angle with respect to the longitudinal axis, and the housing inner wall is oriented at a second angle with respect to the longitudinal axis. | 12-03-2015 |
20150345355 | METHOD AND SYSTEM FOR PURIFYING THE EXHAUST GASES OF A COMBUSTION ENGINE - A method and system for purifying exhaust gases of a combustion engine or an SCR method for purifying exhaust gases of an internal combustion engine of a vehicle, according to which ammonia gas is exclusively metered in the exhaust gases. The method includes: releasing ammonia gas from at least one solid absorbing matrix where it is stored by sorption; metering the released ammonia gas in the exhaust gases; regenerating the solid absorbing matrix including: generating a refilling ammonia gas by chemically decomposing an ammonia precursor in a biochemical decomposition unit mounted on board the vehicle and storing at least one protein component adapted to decompose the ammonia precursor; directing the refilling ammonia gas to the solid absorbing matrix where it is stored thereon. | 12-03-2015 |
20150354423 | SYSTEM FOR TREATING THE EXHAUST GASES OF A MOTOR VEHICLE ENGINE AND METHOD FOR CONTROLLING SAME - A system for treating exhaust gases of an engine on a motor vehicle including a particle filter, in which regeneration of the particle filter is controlled by bringing temperature of gases that are upstream from the particle filter to a first set temperature to initiate combustion of soot accumulated in the particle filter. A critical area and a normal area are defined on the basis of a point of operation of the engine, by a load of the engine and a speed. The temperature of the exhaust gases is brought to the first set temperature in the normal area and to a second set temperature, which is lower than the first set temperature, in the critical area. | 12-10-2015 |
20150354426 | CATALYTIC CONVERTER SYSTEM WITH CONTROL AND METHODS FOR USE THEREWITH - Aspects of the subject disclosure may include, for example, a catalytic converter system that includes a catalytic converter having a plurality of passages to facilitate at least one catalytic reaction in an exhaust gas from a vehicle engine. A temperature sensor generates a temperature signal indicating at least one temperature of the catalytic converter. An electromagnetic field generator that responds to a control signal by generating an electromagnetic field to inductively to heat the catalytic converter. A controller generates the control signal based on temperature signal. Other embodiments are disclosed. | 12-10-2015 |
20150354476 | Engine Adaptive Control Method to Optimize Exhaust Gas Recirculation and Intake Valve Actuation Events in Low Emission Diesel Engines - A power system may include an internal combustion engine, an exhaust gas recirculation system, a selective catalytic reduction system, and an engine control module. The internal combustion engine includes a plurality of combustion cylinders and a plurality of corresponding intake valves for controlling a flow of air from an intake into the cylinders. The engine control module is configured to adjust a closure timing of the intake valves based on at least one engine parameter and optimization of an operational cost of the power system. A method for controlling the power system may include recirculating a portion of an exhaust flow, injecting a reductant into the exhaust flow, and adjusting a closure timing of the intake valves based on at least one engine parameter and optimization of an operational cost of the power system. | 12-10-2015 |
20150361843 | METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE - A method of regenerating an oxidation device ( | 12-17-2015 |
20150361845 | Feed-Back for Closed-Loop Selective Catalytic Reduction Control - A system and method for using feed-back information, such as, for example, system-out NO | 12-17-2015 |
20150361846 | System Variation Adaption for Feed-Forward Controller - Methods for adapting system variation for an engine system having an after-treatment system. Measured characteristics of the after-treatment system may be used to predict a model value(s) that is compared to a measured value(s) of the after-treatment system to provide a comparison value. Information relating to high frequency uncertainties in characteristics of the after-treatment system are removed from the comparison value to provide an estimated system variation value. The estimated system variation value may then be used to adapt a system command of a controller. Further, information relating to high frequency uncertainties in characteristics of the after-treatment system may be used by a feed-back controller to determine high frequency adaptation values that may also be used to adjust the system command. The inclusion of the estimated system variation may eliminate reliance on the feed-back controller to provide system adjustments for both high and low frequency uncertainties. | 12-17-2015 |
20150361855 | METHOD FOR OPERATING A DRIVE DEVICE AND CORRESPONDING DRIVE DEVICE - A method for operating a drive device includes heating a hot air stream with a heating device integrated in a cylinder head of an internal combustion engine of the drive device, wherein the internal combustion engine is connected with an exhaust gas system; mixing the hot air stream upstream of a catalytic converter with a cold fresh air stream for adjusting a defined temperature of the hot air stream; and supplying the hot air stream having the adjusted defined temperature to the catalytic converter in at least one operating state of the internal combustion engine so as to heat the catalytic converter. | 12-17-2015 |
20150369104 | METHOD FOR CONTROLLING AN OXYGEN CONCENTRATION - A method is disclosed for controlling a concentration of oxygen that is measured by an oxygen sensor of an after-treatment system of an internal combustion engine when a regeneration of an after-treatment device is required. The method may be a computer-implement method, An oxygen sensor target value is lowered in a stepped phase as a function of an exhaust gas flow speed as the exhaust gas passes through the after-treatment system. The oxygen sensor target value is lowered evenly as a function of the exhaust gas flow speed and by a filter phase when a measured air/fuel ratio value is less than or equal to an AFR threshold value and until the oxygen sensor target value is equal to an oxygen sensor final target value. The oxygen concentration is controlled by applying the oxygen sensor target value. | 12-24-2015 |
20150369106 | EXHAUST GAS PURIFICATION SYSTEM AND METHOD FOR CONTROLLING THE SAME - An exhaust gas purification system capable of preventing clogging of a reducing agent injection valve due to solidified urea aqueous solution to prevent a decrease in the exhaust gas purification efficiency of an internal-combustion engine. The exhaust gas purification system includes a diesel particulate filter, a reducing agent injection valve and an SCR catalyst in this order from the exhaust upstream side. A condition satisfaction determination section determines whether or not urea aqueous solution is likely to be solidified when detecting that an ignition switch is turned off, and an internal-combustion engine stop prevention section prevents the internal-combustion engine from being stopped, based on a determination by the condition satisfaction determination section. | 12-24-2015 |
20150369107 | DEVICE AND METHOD FOR FAULT-TRACING PERTAINING TO AN SCR SYSTEM - A method for troubleshooting in an SCR system which has a dosing unit ( | 12-24-2015 |
20150369108 | MULTI-LEG EXHAUST AFTERTREATMENT SYSTEM AND METHOD - An exhaust aftertreatment system for treating exhaust flow from an internal combustion engine, and associated method, allows for independent control of exhaust flow through plural exhaust legs of the exhaust aftertreatment system. The independent control of exhaust flow is carried out by adjusting a valve positioned in each the exhaust legs based on a value of a signal generated by a flow measurement device positioned along at least one of the exhaust legs. The valves can be adjusted to force a target flow in a exhaust leg, relative flow among exhaust legs, exhaust temperature in an exhaust leg, exhaust backpressure and/or imbalance within the exhaust legs. | 12-24-2015 |
20150369142 | Method for Controlling an Engine System - A method is provided for controlling an engine system including an engine, a controller, a clean emissions module (CEM), and a cooling system driven at least partly by the engine system for regulating a temperature of at least part of the CEM. | 12-24-2015 |
20150369154 | SYSTEM AND METHOD FOR ESTIMATING THE QUANTITY OF PARTICULATE ACCUMULATED IN THE PARTICULATE FILTER OF A DIESEL ENGINE - A diesel engine system comprises a particulate filter interposed in an exhaust line and a plurality of fuel injectors associated with an engine. When a quantity of particulate accumulated within said filter is estimated to be greater than a threshold, a control mode of the injectors is activated which causing an automatic regeneration of the filter, by increasing a temperature of exhaust gases fed to the filter sufficient for burning the particulate within the filter. A statistical model is applied which estimates the quantity of particulate accumulated in the filter per time unit The estimation of the particulate accumulated in the filter is corrected after each regeneration of the filter, on a basis of a comparison between the real variation of said temperature during the regeneration as detected by a sensor and a stored reference variation of said temperature previously detected empirically during a regeneration with the filter being empty. | 12-24-2015 |
20150377102 | SYSTEM AND METHOD FOR CONTROLLING AND DIAGNOSING PASSIVE STORAGE DEVICES IN EXHAUST AFTERTREATMENT SYSTEMS - An internal combustion engine system includes an engine and an aftertreatment system that is connected to the engine to receive exhaust flow from the engine. The aftertreatment system includes a passive storage device for passively storing NO | 12-31-2015 |
20150377106 | Method For Providing A Liquid Additive - A method for operating a device for providing a liquid additive having at least one suction point for removing liquid additive from a tank, a valve-free conveying line extending from the suction point to a supply unit, and a valve-free displacement pump, the displacement pump being configured to convey the liquid additive from the tank via the suction point along the conveying line to the supply unit, the displacement unit having at least one seal of the conveying line, displaceable along the conveying line for conveying the liquid additive, includes: a) detecting a stoppage of operation of the device; b) establishing a position of the seal within the positive-displacement pump; and c) changing the position of the seal if the position of the seal does not correspond to a provided park position of the seal. | 12-31-2015 |
20160003118 | OXIDATION CATALYST AND EXHAUST GAS PURIFICATION DEVICE USING SAME - Provided is: an oxidation catalyst having excellent ability to combust diesel fuel intermittently sprayed from a nozzle disposed in an exhaust pipe, the oxidation catalyst being incorporated into an exhaust gas purification device having a diesel particulate filter (DPF) or a catalyst soot filter (CSF) for collecting particulate matter from a diesel engine; and an exhaust gas purification device that uses the oxidation catalyst. An oxidation catalyst for exhaust gas purification in which a precious metal component is carried on an inorganic matrix, wherein the inorganic matrix is one or more inorganic oxides selected from the group consisting of alumina, titania, zirconia, silica, and silica-alumina, the oxidation catalyst being characterized in the use of a material in which the activation energy of diesel fuel combustion performance is 72 kJ/mol or less. | 01-07-2016 |
20160003119 | DEVICE AND METHOD FOR REDUCING UNWANTED EMISSIONS FROM AN ENGINE AT START OF SAID ENGINE - A method to reduce during the start of an engine undesired emissions from the engine, where an SCR catalytic converter for the cleaning of exhaust gases is arranged in an exhaust passage at the engine. The method includes controlling the dosage of fuel to the engine with a certain delay relative to what is the case during essentially optimal combustion in order to reduce the development of heat that results from the combustion of fuel through non-optimal combustion. Also a computer program product comprising program code to implement a method of reducing emissions. Also an arrangement to reduce during the start of an engine undesired emissions from the engine and a motor vehicle that is equipped with the arrangement. | 01-07-2016 |
20160003121 | METHOD FOR CONTROLLING THE REDUCTANT BUFFER LEVEL IN AN EXHAUST GAS AFTERTREATMENT DEVICE - A method for controlling a reductant buffer level in an exhaust gas after treatment device connectable downstream of an internal combustion engine includes performing a first reductant injection of a first amount upstream the exhaust gas after treatment device, performing a second reductant injection of a second amount upstream the exhaust gas after treatment device, which second amount is different to the first amount, evaluating the NOx conversion resulting from the first and second reductant injections downstream the exhaust gas after treatment device to obtain a first and second result, controlling a further reductant injection in dependence of the first and second results from the first and second NOx conversion evaluations. | 01-07-2016 |
20160003123 | ELECTRONIC CONTROL MODULE FOR AN INTERNAL COMBUSTION ENGINE - An electronic control module for operating an internal combustion engine is disclosed. The electronic control module is configured to monitor a first air-fuel equivalence ratio of engine exhaust gases upstream of a NOx trap, and to activate a diagnostic routine for the NOx trap when the first air-fuel equivalence ratio is smaller than one. The diagnostic routine enables the electronic control module to monitor a second air-fuel equivalence ratio of engine exhaust gases downstream of the NOx trap, to use the first and second air-fuel equivalence ratios to calculate an index that is representative of the conversion efficiency of the NOx trap, and to identify a failure of the NOx trap when the efficiency index is lower than a predetermined threshold value. | 01-07-2016 |
20160010528 | REDUCED EMISSIONS INTERNAL COMBUSTION ENGINE SYSTEMS | 01-14-2016 |
20160010529 | APPARATUS, METHOD, AND SYSTEM FOR DIAGNOSING REDUCTANT DELIVERY PERFORMANCE | 01-14-2016 |
20160010595 | Device for Recirculating Exhaust Gas from the Engine of an Automobile, and Use of Such a Device | 01-14-2016 |
20160010614 | METHOD AND SYSTEM FOR EXPEDITING ENGINE WARM-UP | 01-14-2016 |
20160017782 | Method for starting the operation of a device for providing a liquid additive - A method for starting operation of a device for providing a liquid additive, the device having at least one preheating element and at least one PTC heating element, includes: a) heating by the at least one preheating element; b) conducting heat from the at least one preheating element to the at least one PTC heating element such that a temperature of the at least one PTC heating element is raised; and c) heating by the at least one PTC heating element when the temperature of the PTC heating element has been raised. | 01-21-2016 |
20160017826 | SYSTEM FOR CONTROLLING EMISSIONS OF ENGINE AND RELATED METHOD AND NON TRANSITORY COMPUTER READABLE MEDIA - System for controlling emissions of an engine is disclosed. The system includes a controller to determine one or more aging parameters of the engine, and to control one or more operating parameters of the engine, at least, based on the one or more aging parameters, such that the emissions from the engine are maintained to be substantially constant during a useful life of the engine. Method and non-transitory computer readable media for controlling emissions of an engine are also disclosed. | 01-21-2016 |
20160024985 | SYSTEM AND METHOD FOR GAS/LIQUID MIXING IN AN EXHAUST AFTERTREATMENT SYSTEM - An exhaust treatment system for an internal combustion engine having improved mixing of an injected fluid comprises an exhaust gas conduit configured to receive exhaust gas from an internal combustion engine and to deliver the exhaust gas to the exhaust treatment system. A fluid injector in fluid communication with the exhaust gas conduit configured delivers a fluid into the exhaust gas and an evaporation volume disposed in the exhaust conduit downstream of the fluid injector is configured to slow the bulk velocity of the fluid and exhaust gas mixture to thereby increase the residence time of the exhaust gas mixture therein. An exhaust treatment device is configured to receive the fluid and exhaust gas mixture. | 01-28-2016 |
20160025021 | SYSTEMS AND METHODS FOR EXHAUST CATALYST TEMPERATURE CONTROL - Methods and systems are provided for exhaust catalyst temperature control by metering exhaust bypass flow from a dedicated EGR cylinder. A continuously variable bypass valve may be adjusted to vary an amount of exhaust directed to an exhaust catalyst from a dedicated EGR cylinder via a bypass passage relative to exhaust recirculated to the engine intake via an EGR passage. At lower catalyst temperatures, more exhaust is metered via the bypass passage to enable catalyst temperature to be maintained above an activation level. | 01-28-2016 |
20160032799 | METHOD AND SYSTEM OF MAINTAINING DPF REGENERATION FOR IMPROVING DURABILITY OF DPF FILTER - A method of maintaining diesel particulate filter (DPF) regeneration for improving durability of a DPF, may include determining, by a controller, whether a vehicle enters an idle state during the DPF regeneration, controlling, by the controller, a concentration of oxygen introduced into the DPF to be equal to or less than a first reference value when the vehicle enters the idle state, and performing, by the controller, a regeneration process until a soot mass in the DPF may be equal to or less than a target reference value. | 02-04-2016 |
20160032801 | AFTERTREATMENT SYSTEM HAVING MULTIPLE DOSING CIRCUITS - An aftertreatment system is disclosed for use with a combustion engine. The aftertreatment system may have at least one exhaust passage, and a plurality of dosing circuits configured to inject reductant into the at least one exhaust passage. The aftertreatment system may also have a controller in communication with each of the plurality of dosing circuits. The controller may be configured to determine a failure of a first of the plurality of dosing circuits, and to selectively adjust operation of a second of the plurality of dosing circuits based on the failure. | 02-04-2016 |
20160032804 | METHOD PERTAINING TO AN SCR SYSTEM AND AN SCR SYSTEM - A method for an SCR system comprising a dosing unit ( | 02-04-2016 |
20160032805 | Reintroduction of Air in Delivery System Accumulator - According to one embodiment, an apparatus for reintroducing air includes a bypass valve that reduces pressure in an accumulator that stores reductant to less than an air supply pressure of an air supply. The apparatus also includes a metering valve that fills the accumulator with air from the air supply at the air supply pressure, and a pump that pumps reductant into the accumulator. | 02-04-2016 |
20160032850 | Method for Thermal Control of Exhaust Aftertreatment - There is disclosed a method of regenerating at least one aftertreatment device in an exhaust system of an internal combustion engine by changing a calibration of the exhaust gas recirculation system with the engine to increase temperature of exhaust gas provided to the at least one aftertreatment device, and further incrementally changing the calibration to obtain an exhaust gas temperature within a target regeneration temperature range. | 02-04-2016 |
20160040567 | Device and method for treating an exhaust gas containing particles - A device for treating an exhaust gas containing particles includes: an exhaust gas line, an emission electrode and an electric supply line for the emission electrode. The electric supply line is at least partially surrounded by an electric insulator and the electric insulator has an outer diameter, the electric insulator extending from the exhaust gas line substantially in the direction of the longitudinal axis of the exhaust gas line. The outer diameter measures at most 20 mm in the terminal region towards the longitudinal axis. | 02-11-2016 |
20160040569 | EXHAUST GAS PURIFYING FILTER, SYSTEM AND REGENERATING GASOLINE PARTICULATE FILTER, AND METHOD THEREOF - An exhaust gas purifying filter, a system for regenerating a particulate filter, and a method therefore are disclosed. An exhaust gas purifying filter may include: an ammonia storage catalyst unit adapted to absorb ammonia contained in the exhaust gas when a temperature of the ammonia storage catalyst unit is lower than a predetermined temperature, release the absorbed ammonia when the temperature of the ammonia storage catalyst unit is higher than or equal to the predetermined temperature, and generate nitrogen oxide from the released ammonia; and a particulate filter adapted to trap particulate matter contained in the exhaust gas and regenerate the trapped particulate matter by using the nitrogen oxide generated from the ammonia storage catalyst unit. | 02-11-2016 |
20160040575 | PUMP PURGE FOR UREA DOSING SYSTEM - According to one embodiment, a diesel exhaust fluid purging system includes a metering valve with a supply port and a delivery port. The purging system also includes a pump assembly that is fluidly connected to the supply port of the metering valve. The pump assembly includes a pump and a single supply line that is fluidly connectable with a diesel exhaust fluid source. The purging system further includes an injection assembly that is fluidly connected to the delivery port of the metering valve. The injection assembly includes an air supply line that is fluidly connectable with an air supply source. Additionally, the purging system includes a controller in electrical communication with the metering valve, the pump assembly, and the injection assembly. The controller is configured to purge the pump assembly of residual diesel exhaust fluid using air from the air supply line. | 02-11-2016 |
20160040579 | PARTICULATE FILTER AND METHOD FOR CONTROL - An exhaust treatment system comprises a filter device in communication with the engine and configured to receive exhaust gas therefrom. The filter device comprises a canister including an inlet, a filter structure having an upstream, inlet end, a downstream, outlet end, and a series of filtering flow passages. A center zone conduit is in sealing, fluid contact with the downstream, outlet end of the filter structure to thereby define a center flow zone and perimeter flow zone. A flow control valve assembly is disposed in the center zone conduit. A controller is in signal communication with the flow control valve and a temperature sensor and monitors a temperature profile of the filter structure wherein, upon a determination that the temperature of the center flow zone of the filter structure is above a predetermined level, the controller drives the flow control valve assembly to a closed position. | 02-11-2016 |
20160047286 | EXHAUST SYSTEM WITH A MODIFIED LEAN NOx TRAP - An exhaust system for treating an exhaust gas from an internal combustion engine is disclosed. The system comprises a modified lean NO trap (LNT), a urea injection system, and an ammonia-selective catalytic reduction catalyst. The modified LNT comprises a first layer and a second layer. The first layer comprises a NO adsorbent component and one or more platinum group metals. The second layer comprises a diesel oxidation catalyst zone and an NO oxidation zone. The diesel oxidation catalyst zone comprises a platinum group metal, a zeolite, and optionally an alkaline earth metal. The NO oxidation zone comprises a platinum group metal and a carrier. The modified LNT stores NO at temperatures below about 200° C. and releases at temperatures above about 200° C. The modified LNT and a method of using the modified LNT are also disclosed. | 02-18-2016 |
20160047287 | Internal Combustion Engine Having Dedicated Cylinder(s) for Generation of Both EGR and Exhaust Aftertreatment Reductant for NOx-Reducing Catalyst - An exhaust gas recirculation (EGR) system for an internal combustion engine having dedicated EGR and operating at a lean air-fuel ratio. In such engines, one or more cylinders is operable as a dedicated EGR cylinder, such that all of the exhaust produced by the dedicated EGR cylinder(s) may be recirculated to the engine's main (non dedicated) cylinders. Because the engine is lean burn, its exhaust aftertreatment system has a NOx-reducing device. An EGR loop is configured to recirculate EGR from the dedicated EGR cylinder(s) to the engine's intake manifold. A diversion line connects the EGR loop to the exhaust aftertreatment system, thereby delivering EGR as syngas for the NOx-reducing device. The syngas is used either directly as a reductant or to a catalyst that reduces the syngas to ammonia for use as a reductant. | 02-18-2016 |
20160047288 | REDUCTANT INJECTION IN AN EXHAUST SYSTEM - An engine exhaust system comprising an exhaust pipe routing an exhaust flow through a bend, and being in fluid communication with a catalyst downstream of the bend. An injector mounted to the exterior of the exhaust pipe, the injector with a tip disposed within the exhaust pipe at the bend, for injecting liquid reductant into the exhaust pipe. A shield member mounted in the exhaust pipe, the shield member comprising a generally tubular or frustoconical structure having proximal and distal end, the proximal end being disposed such that the injection tip is inside the shield member, the distal end being disposed towards a centerline of the exhaust pipe. A vane mounted in relation to the shield member, the vane being arranged to direct a proportion of exhaust flow from upstream of the bend in a substantially arcuate path into the proximal end of the shield member. | 02-18-2016 |
20160053644 | METHOD AND SYSTEM FOR THE REMOVAL OF PARTICULATE MATTER SOOT, ASH AND HEAVY METALS FROM ENGINE EXHAUST GAS - Method and system for removal of soot, ash and heavy metals, and optionally additionally NO | 02-25-2016 |
20160053647 | METHOD OF INCREASING VOLUMETRIC THROUGHPUT OF AN INTERNAL COMBUSTION ENGINES USED IN VAPOR DESTRUCTION APPLICATIONS - A method and device for controlling emissions of VOC's comprises transporting VOC's to an engine and transporting the exhaust from the engine into a manifold. Supplemental air is transporting into the manifold and heat is transferred from the exhaust to the supplemental air within the manifold. The supplemental air is mixed with the exhaust and the mixture is transferred to a pollution abatement device. | 02-25-2016 |
20160053648 | METHOD AND INTERNAL COMBUSTION ENGINE ARRANGEMENT FOR REGENERATING AN EXHAUST AFTER-TREATMENT DEVICE - A process is provided for regenerating an exhaust gas after-treatment device in an exhaust line of an internal combustion engine arrangement, the exhaust line including a particle filter. The process includes identifying when soot loading of the particle filter exceeds a predetermined level. After that, temperature of exhaust gases at the particle filter is maintained within a first temperature range until at least one of a predetermined period of time has lapsed or a determination is made that soot loading of the particle filter is below the predetermined level. After that, the temperature of the exhaust gases at the particle filter is increased to within a second temperature range above the first temperature range. An internal combustion engine arrangement is also disclosed. | 02-25-2016 |
20160053651 | AMMONIA STORAGE STRUCTURE AND ASSOCIATED SYSTEMS - The disclosure relates to an ammonia storage structure in particular for the selective catalytic reduction of nitrogen oxides in the exhaust gases of combustion vehicles, including at least one storage material in which the ammonia can be stored, where the structure includes at least two different storage portions, each storage portion containing a storage material, and not all the storage materials of the different storage portions being identical. The disclosure also relates to an ammonia storage and removal system of a vehicle that includes a storage chamber, including such a storage structure. A selective catalytic reduction system for internal combustion engine exhaust gases, includes such an ammonia storage system and to a module for feeding ammonia into the exhaust gases. | 02-25-2016 |
20160053652 | REDUCTANT DELIVERY UNIT FOR AUTOMOTIVE SELECTIVE CATALYTIC REDUCTION WITH OPTIMIZED FLUID HEATING - A reductant delivery unit reduces nitrogen oxide (NOx) emissions from a vehicle. The delivery unit includes a solenoid operated fluid injector having a fluid inlet and a fluid outlet. The inlet receives a source of reducing agent and the outlet communicates with an exhaust gas flow path of the vehicle so that the fluid injector controls injection of the reducing agent into the exhaust gas flow path. The fluid injector has an inlet tube for directing the reducing agent between the inlet and the outlet. A coil heater is integral with the fluid injector and is constructed and arranged, when energized, to inductively heat the inlet tube and thus at least a portion of the reducing agent so that an unheated volume, of the reducing agent in the inlet tube, which is adjacent to the fluid outlet, is less than about 100 mm | 02-25-2016 |
20160061079 | AFTERTREATMENT SYSTEM HAVING DYNAMIC INDEPENDENT INJECTOR CONTROL - An aftertreatment system is provided for an engine. The aftertreatment system may have at least one exhaust passage and a plurality of reductant injectors that are controllable to dose reductant into the at least one exhaust passage. The aftertreatment system may also have at least one sensor configured to generate a signal indicative of an exhaust parameter and a controller in communication with each of the plurality of reductant injectors and the sensor. The controller may be configured to dynamically adjust the dosing of the plurality of injectors, wherein adjusting the dosing includes adjusting at least one of an injector timing, an injector sequence, and a grouping of the plurality of injectors that are simultaneously injecting based on the signal. | 03-03-2016 |
20160061080 | CONTROL TECHNIQUES OF EXHAUST PURIFICATION SYSTEM AND EXHAUST PURIFICATION SYSTEM - To provide an exhaust purifying system and a method for controlling the exhaust purifying system that avoid occurrence of clogging, breakage, or the like of a reducing agent injection valve caused by the solidification of a reducing agent and prevent reduction in the efficiency of reducing agent recovery processing and exhaust gas purification. | 03-03-2016 |
20160061085 | CONTROL METHOD FOR EXHAUST GAS AFTERTREATMENT DEVICE - A diesel oxidation catalyst, a NOx occlusion reduction catalyst, and a diesel particulate filter are connected to an exhaust pipe of an engine, downstream of an exhaust pipe injector provided on the exhaust pipe. NOx in the exhaust gas is occluded by the NOx occlusion reduction catalyst when an air-fuel ratio is lean. The occluded NOx is reduced and purified when the air-fuel ratio is rich. When a prescribed amount of particulate matter has accumulated in the diesel particulate filter, the exhaust gas temperature is raised when performing particulate matter regeneration. The exhaust gas temperature is further raised to perform a sulphur purge. The rich condition is prohibited during the particulate matter regeneration period and the sulphur purge period. When the sulphur purge is completed, the rich condition prohibition continues until the difference between the inlet temperature of the diesel oxidation catalyst and the outlet temperature of the NOx occlusion reduction catalyst becomes equal to or less than a predetermined threshold. | 03-03-2016 |
20160061128 | Method and Apparatus for Exhaust Gas Aftertreatment Device Warming - To help meet exhaust gas emissions standards, an internal combustion engine may have an exhaust gas aftertreatment device located in its exhaust gas stream. However, the exhaust gas aftertreatment device may only operate effectively above a minimum threshold temperature. In the present disclosure there is provided a method and apparatus for warming the exhaust gas aftertreatment device and a method and apparatus for controlling when exhaust gas aftertreatment device warming should be initiated and stopped. | 03-03-2016 |
20160061129 | SYSTEM AND METHOD OF RECOVERING OXIDATION CATALYST PERFORMANCE - A system and method are disclosed for regenerating an oxidation catalyst used in an aftertreatment system of a multifuel internal combustion engine. According to at least one aspect of the present disclosure, recirculated exhaust gas is employed to enable recovery periods in which the engine generates oxygen-depleted exhaust to desulfate and deoxidize the oxidation catalyst. In certain embodiments, the system may include an exhaust gas recirculation system with a cooler and regulation valve to introduce exhaust gas into the engine. | 03-03-2016 |
20160061131 | METHOD FOR IDENTIFICATION OF A THRESHOLD-LEVEL CATALYST - Systems and methods for estimating catalyst transfer function gain are disclosed. In one example, an air-fuel ratio forcing function is applied to a catalyst. Air-fuel ratios upstream and downstream of the catalyst are manipulated to determine a transfer function gain of the catalyst. The transfer function gain may be a basis for indicating the presence or absence of catalyst degradation. | 03-03-2016 |
20160069233 | ENGINE EXHAUST AFTER-TREATMENT SYSTEM AND METHOD - Soot in engine exhaust gas is separated in a cyclonic filter and burned inside the cyclonic filter. An acoustic agglomerator has increased soot density in the engine exhaust gas before entering the cyclonic filter. | 03-10-2016 |
20160069238 | Method for operating a device for the dosed supply of a liquid - A method for operating a device for the dosed supply of a liquid includes: detecting a demanded dose amount of the liquid; activating an electric drive of a pump to move a seal in a delivery direction from an inlet to an outlet to deliver the liquid by application of an operating voltage to the electric drive; stopping operation of the pump when the delivered amount of the liquid corresponds to the demanded dose amount; stopping movement of an eccentric; and maintaining a holding voltage at the electric drive. In response to the holding voltage, a holding torque is exerted on the eccentric and a movement of the eccentric counter to the delivery direction is prevented. | 03-10-2016 |
20160069243 | Method for Operating an Exhaust Gas Purification System of a Motor Vehicle Combustion Engine - A method for operating an exhaust gas purification system of a motor vehicle internal combustion engine is disclosed. The system has an SCR catalyst where a reducing agent containing ammonia is metered into the exhaust gas at a predeterminable metering rate which is produced from a base value and an adaptation factor which corrects the base value. A test procedure checks and, if appropriate, adjusts the adaptation factor where a first nitrogen oxide value is compared with a second nitrogen oxide value of the exhaust gas, where the first and the second nitrogen oxide value are determined by the same nitrogen oxide sensor disposed downstream of the SCR catalyst. The first nitrogen oxide value is determined when the metering of the reducing agent is switched off and the second nitrogen oxide value is determined when the reducing agent is metered at a test metering rate which can be predetermined. | 03-10-2016 |
20160076419 | Systems and Methods for Reducing Emissions in Exhaust of Vehicles and Producing Electricity - Methods and apparatus for removing undesired pollutants from exhausts streams of spark-ignited internal-combustion engines in vehicles while producing electrical energy as a byproduct. The apparatus includes a reduction catalyst, a thermoelectric generator (TEG), and an oxidation catalyst. The TEG cools the exhaust stream and generates electricity. The exhaust stream is oxygenated after passing through the TEG and prior to passing through the oxidation catalyst. | 03-17-2016 |
20160076421 | METHOD OF CONTROLLING AMMONIA AMOUNT ABSORBED IN SELECTIVE CATALYTIC REDUCTION CATALYST AND EXHAUST SYSTEM USING THE SAME - A method of controlling ammonia (NH3) amount absorbed in a selective catalytic reduction (SCR) catalyst may include determining a target NH3 absorption amount considering a safety factor on a basis of NH3 absorption characteristics according to a temperature of the SCR catalyst, determining a predicted NH3 reaction amount according to a current driving condition, and controlling injection of urea according to the target NH3 absorption amount and the predicted NH3 reaction amount. | 03-17-2016 |
20160076424 | COOLANT HEATING METHOD FOR RELEASING REDUCTANT - A system and method for heating main unit containing host salt having ammonia that is used as reductant in an engine exhaust gas after-treatment system. Engine coolant is delivered from internal combustion engine to auxiliary heating device. When necessary, the auxiliary heating device heats the engine coolant to temperatures that will aid in releasing ammonia from the host salt. The auxiliary heating device may employ an electric heating element, a combustion element, or be an exhaust gas heat exchanger, among other heating methods. The heated engine coolant is delivered to a coolant heating manifold, where heat from the heated coolant is transferred to the main unit. The transferred heat may aid in elevating the temperature in/of the main unit to facilitate the release of stored ammonia from the host salt as a gaseous reductant. The gaseous ammonia may then flow from the main unit. | 03-17-2016 |
20160076488 | Apparatus And Methods For Exhaust Gas Recirculation For An Internal Combustion Engine Powered By A Hydrocarbon Fuel - A method to process exhaust gas expelled from at least one cylinder of a plurality of cylinders of an internal combustion engine, the method comprising providing an internal combustion engine, wherein the engine comprises a steam hydrocarbon reformer including a steam reformation catalyst, treating exhaust gas of the engine containing hydrocarbon and water by reacting the hydrocarbon and water in the presence of the steam reformation catalyst in the steam hydrocarbon reformer to provide treated exhaust gas. The treated exhaust gas includes carbon monoxide gas and hydrogen gas produced from the reaction, and mixing the treated exhaust gas, including the carbon monoxide gas and hydrogen gas produced in the steam hydrocarbon reformer with air to provide the mixture of air and treated exhaust gas introduced into the cylinders of the engine. | 03-17-2016 |
20160084131 | SYSTEMS AND TECHNIQUES FOR NOZZLE COOLING OF DIESEL EXHAUST FLUID INJECTION SYSTEMS - A system is provided for delivery of diesel exhaust fluid or other reductant to an injector for release into an engine exhaust aftertreatment system. The injector includes a nozzle assembly that thermally shields the diesel exhaust fluid from the exhaust gas temperatures. A diesel exhaust fluid delivery procedure is also disclosed for nozzle cooling prior to operation of the injector for emissions reduction. | 03-24-2016 |
20160084182 | THERMAL MANAGEMENT FOR REGENERATING AN AFTERTREATMENT DEVICE - A system and method for regeneration of an aftertreatment component are described. The disclosed method can employ any one or combination of operating modes that obtain a target condition of the exhaust gas to support or initiate regeneration of the aftertreatment device. | 03-24-2016 |
20160090887 | INTEGRATIVE REDUCTANT SYSTEM AND METHOD USING CONSTANT VOLUME INJECTION - Various embodiments relate to a selective catalytic reduction system for treating exhaust gases of an internal combustion engine. The system includes an inlet section that receives exhaust gases from the engine. The system includes a tank storing diesel exhaust fluid (“DEF”), a pump, a valve, and an injector each in fluid communication with each other. The injector is coupled to the inlet exhaust pipe and configured to inject DEF into the exhaust gases flowing through the inlet exhaust pipe in a plurality of pulses. Each of the plurality of pulses injects a constant volume of DEF into the inlet exhaust pipe. The system further includes a controller configured to operate the pump and the valve such that a time interval between successive constant volume pulses of the plurality of pulses is varied based on a variable oxides of nitrogen content of the exhaust gases. | 03-31-2016 |
20160090888 | ABNORMALITY DETECTION METHOD FOR AFTER TURBO CATALYST - Provided is a method for detecting abnormality of an after turbo catalyst (ATC) | 03-31-2016 |
20160097312 | DEVICE AND METHOD AT AN EXHAUST AFTERTREATMENT SYSTEM FOR AN ENGINE - A method at an exhaust gas cleaning system for an engine ( | 04-07-2016 |
20160097313 | ENGINE CONTROL METHOD FOR MAINTAINING PERFORMANCE OF OXIDATION CATALYST - In an engine control method for maintaining performance of oxidation catalyst, fuel of a compressed natural gas engine under a lean-burn condition with an air-fuel equivalence ratio less than or equal to 1 is burned. Activation of the oxidation catalyst for purifying an exhaust gas of the engine is determined. Necessity of a regeneration mode for recovering catalytic activation of the oxidation catalyst according to an activation state of the oxidation catalyst and an operating condition of the engine is determined. And, the air-fuel equivalence ratio is increased to a range of from 1.10 to 1.20 when the oxidation catalyst is inactive and an engine speed is lower than a predetermined speed. | 04-07-2016 |
20160108833 | SYSTEM AND METHOD FOR CONTROLLING AIR-FUEL RATIO OF CNG ENGINE - A system includes a compressed natural gas (CNG) engine, a three-way catalyst (TWC), a first oxygen sensor connected to the CNG engine, and a second oxygen sensor connected to the three-way catalyst. A method for controlling an air-fuel ratio of the CNG engine includes determining whether or not the CNG engine and the three-way catalyst are normal by measuring output voltages of the first and second oxygen sensors, determining whether or not the three-way catalyst is aged, and adjusting the air-fuel ratio of the CNG engine based on a result of the step of determining whether or not the three-way catalyst is aged | 04-21-2016 |
20160108836 | METHOD OF OPERATING A DRIVE DEVICE AND CORRESPONDING DRIVE DEVICE - A method for operating a drive device with an internal combustion engine and an exhaust gas tract having a storage catalytic converter for purifying exhaust gas, a first lambda probe disposed upstream of the storage catalytic converter and a second lambda probe disposed downstream of the storage catalytic converter, includes determining a lambda value for controlling a mixture composition for the internal combustion engine based on a measurement signal from the first lambda probe and an offset value. The offset value is determined with a trim control when a measurement signal of the second lambda probe is in a normal operating range of values, and is adjusted in a regeneration period, during which the storage catalytic converter regenerated, with a predetermined correction value when the measurement signal of the second lambda probe is outside the normal operating range of values. A corresponding drive device is also disclosed. | 04-21-2016 |
20160108837 | LIMP-HOME METHOD FOR SAFEGUARDING THE CATALYST OF AN INTERNAL COMBUSTION ENGINE IN CASE OF A DEFECTIVE CONTROLLED GRILLE SHUTTER AND VEHICLE THEREOF - A vehicle is disclosed which includes: an engine; a catalyst purifying exhaust gas of the engine; a grille shutter adjusting an opening area of a radiator grille; and an electronic control unit configured to: (a) control an injection quantity of fuel to be supplied to the engine, (b) detect a malfunction of the grille shutter in a state where the grille shutter is closed, and (c) increase the injection quantity when the malfunction is detected in comparison to when the malfunction is not detected. | 04-21-2016 |
20160115836 | EXHAUST GAS TREATMENT SYSTEM - A method and system for treating exhaust gas from stationary engines used to generate electricity is provided. Substantially all of the exhaust gases from at least one stationary combustion engine used for electrical power generation are collected and routed to an absorption tower. Inside the absorption tower the exhaust gases travel upwards in and through a plurality of perforated plates to a gas outlet in a top of the absorption tower. While the gas is ascending in the absorption tower, water is sprayed on the ascending gas and the perforated plates and this water is collected in the bottom of the absorption tower where at least some of it will be reused by spraying it back into the absorption tower to treat more exhaust gas from the combustion engines. | 04-28-2016 |
20160115837 | Method for operating a device for providing a liquid additive - A method for operating a device for providing a liquid additive, the device having a delivery path running from a tank to an additive dispensing device, at least one section of the delivery path forming a jacket, includes: delivering the liquid additive from the tank to the additive dispensing device along the delivery path in a delivery direction; stopping the delivery of the liquid additive; at least partially evacuating the section of the delivery path; and forming a thermal insulator in the jacket by the evacuated delivery path. | 04-28-2016 |
20160115887 | CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - A control method for an internal combustion engine having a plurality of cylinders and a filter provided in an exhaust passage of the internal combustion engine in order to collect particulate matter. The control method includes a partial cylinder stoppage step, in which a supply of fuel is stopped in a part of a plurality of cylinders while continuing to supply fuel to the other cylinders such that combustion is performed therein, is implemented after a request to stop an internal combustion engine is issued but before the internal combustion engine is stopped, and after the partial cylinder stoppage step, an all cylinder stoppage step is implemented to stop the internal combustion engine by stopping the supply of fuel in all of the cylinders. | 04-28-2016 |
20160123201 | COMPRESSION IGNITION ENGINE SYSTEM WITH IMPROVED REGENERATION VIA CONTROLLED ASH DEPOSITS - An engine system includes an electronically controlled compression ignition engine configured to burn diesel fuel and a high ash oil to produce an exhaust with a temperature and NOx to soot ratio as well as a controlled level of ash deposits on the particulate filter of the system. An aftertreatment system is fluidly connected to the engine and includes a diesel oxidation catalyst, a reductant supply, and a diesel particulate filter coated with a NOx reduction catalyst. The soot load density on the diesel particulate filter can be stabilized by oxidizing soot at about a same rate as the compression ignition engine is supplying soot to the aftertreatment system. | 05-05-2016 |
20160123204 | CONTROL APPARATUS AND CONTROL METHOD FOR REDUCING AGENT SUPPLY APPARATUS - The control method for reducing agent supply apparatuses, when a liquid reducing agent is frozen, unfreezes the frozen liquid reducing agent using a heating device and enables the injection control of the liquid reducing agent in an exhaust passage of the internal combustion engine. The control method includes determining the necessity of unfreezing of the liquid reducing agent and calculating the necessary time required for the unfreezing when the speed of the internal combustion engine exceeds a predetermined threshold during startup of the internal combustion engine and permitting the injection control of the liquid reducing agent when the unfreezing is not necessary or the unfreezing is completed. | 05-05-2016 |
20160123205 | METHOD FOR OPERATING A DRIVING SYSTEM AND CORRESPONDING DRIVING SYSTEM - A method for operating a driving system having an internal combustion engine and an exhaust gas purifying device through which exhaust gas from the internal combustion engine flows in order to be purified. The exhaust gas purifying device has at least one catalyst element for catalytic conversion of nitrogen monoxide into nitrogen dioxide at a determined conversion rate. In order to compensate for an agerelated decrease in the conversion rate of the catalyst element the nitrogen monoxide emission from the internal combustion engine and/or the exhaust gas temperature before the catalyst element are adjusted as a function of the current conversion rate and/or the age of the catalyst element so that the nitrogen dioxide concentration after the catalyst element is greater than or equal to a minimum concentration and/or that the molar ratio between nitrogen monoxide and nitrogen dioxide after the catalyst element corresponds to a predetermined ratio. | 05-05-2016 |
20160123258 | UPSTREAM NOX ESTIMATION - A method for controlling operation of an internal combustion engine determines an estimated NOx value as a function of at least one engine operating parameter. The method also determines an actual NOx value using a NOx sensor positioned in an exhaust gas stream of the internal combustion engine. The method detects at least one condition indicative of whether or not the actual NOx value is accurate. The actual NOx value is used for controlling engine operation when the at least one condition indicates that the actual NOx value is accurate, while the estimated NOx value is used for controlling engine operation when the at least one condition indicates that the actual NOx value is inaccurate. | 05-05-2016 |
20160123259 | METHOD FOR THE OPERATION OF AN EXHAUST-GAS TREATMENT SYSTEM, DEVICE FOR CONTROLLING AN EXHAUST-GAS TREATMENT SYSTEM, EXHAUST-GAS TREATMENT SYSTEM, ENGINE CONTROL UNIT, AND INTERNAL COMBUSTION ENGINE HAVING AN EXHAUST-GAS TREATMENT SYSTEM - A method for an exhaust-gas treatment system having a diesel particle filter, in particular for the operation of an internal combustion engine having an exhaust-gas treatment system, in particular an internal combustion engine including a motor. The method includes the steps of: operating the diesel particle filter, in particular with regular regeneration; and determining a present soot loading of the diesel particle filter. Provision is made for a comparison of the present soot loading with a predetermined soot loading reference value to be performed and, if the soot loading reference value is undershot, for the soot particle loading in the diesel particle filter to be increased in order to adhere to the demanded emission limit value for the number of soot particles. | 05-05-2016 |
20160123260 | METHOD OF PRE-EMPTIVELY REGENERATING A LEAN NOX TRAP - A method of predicting the future use of a vehicle or an engine of the vehicle is used to evaluate whether NOx slippage from a lean NOx trap is likely to occur during a current drive cycle and also for scheduling when favorable conditions are likely to exist to purge the lean NOx trap before the slippage of NOx from the lean NOx trap is expected to occur. | 05-05-2016 |
20160131001 | CATALYST DESIGN FOR SELECTIVE-CATALYTIC-REDUCTION (SCR) FILTERS - Provided is an improved selective catalytic reduction filtering (SCRF) device that separates reduction of nitrogen oxides (NOx) from oxidation of soot, hydro-carbon (HC) and carbon monoxide (CO). The SCRF device has a diesel oxidation catalyst unit for oxidizing HC and CO and oxidizing diesel fuel to support DPF regenerations, and a SCR filtering unit, including at least one inlet channel and being connected to the diesel oxidation catalyst unit, for controlling (soot) emission, cleaning-up slipped HC and CO during a DPF regeneration, and reducing nitrogen oxides in the diesel exhaust gas. At least one inlet channel is coated with an ammonia-neutral oxidation catalyst, and at least one outlet channel is coated with a selected catalytic reduction catalyst. | 05-12-2016 |
20160131002 | UREA BACKFLOW PREVENTION APPARATUS OF SCR AND A CONTROL METHOD THEREOF - A urea backflow prevention apparatus of Selective Catalytic Reduction (SCR) system that injects a urea aqueous solution to an exhaust pipe may include a urea tank storing the urea aqueous solution, a nozzle being installed on the exhaust pipe and injecting the urea aqueous solution into the exhaust pipe, a supply pump pressurizing the urea aqueous solution in order to inject the urea aqueous solution from the nozzle to the exhaust pipe, a suction line supplying the urea aqueous solution stored in the urea tank to the supply pump by connecting the urea tank and the supply pump, a pressure line delivering the urea aqueous solution pressurized at the supply pump to the nozzle by connecting the supply pump and the nozzle, and a return line collecting urea aqueous solution not injected at the nozzle to the urea tank by connecting the supply pump and the urea tank. | 05-12-2016 |
20160131005 | Method for operating a device for conveying a liquid - A method for operating a device configured to deliver a liquid includes: a) back-suctioning a liquid situated in a pressure line section counter to a usual delivery direction by at least one pump; b) monitoring at least one operating parameter of the at least one pump during the back-suctioning, the at least one operating parameter being representative of a counterpressure that the at least one pump operates against during the back-suctioning; and c) detecting an increase in the counterpressure, and stopping the back-suctioning. | 05-12-2016 |
20160131006 | SYSTEM AND METHOD FOR CONTROLLING AN ENGINE THAT INCLUDES LOW PRESSURE EGR - Methods and systems for operating an engine that includes a low pressure EGR passage and a selective reduction catalyst are disclosed. In one example, an actuator is adjusted in response to a NOx mass flow rate in the low pressure EGR passage. | 05-12-2016 |
20160131010 | Apparatus, Method, and System for Diagnosing Reductant Deposits in an Exhaust Aftertreatment System - An exhaust gas treatment system for an internal combustion engine may have a reductant delivery system that delivers reductant to an exhaust stream in an exhaust aftertreatment system. A temperature sensor may be positioned in or near the flow of reductant and exhaust to measure the temperature of the reductant and exhaust. A change in temperature over time, such as an increase, decrease, or change in variation amplitude, may indicate the presence of a reductant deposit in the system. Detection of the deposit may initiate a regeneration cycle in which the operating characteristics of the system change to eliminate the reductant deposit to prevent it from hindering the performance of the exhaust aftertreatment system. | 05-12-2016 |
20160131013 | SYSTEMS AND METHODS FOR SENSING PARTICULATE MATTER - Systems and methods are provided for sensing particulate matter in an exhaust system of a vehicle. In one example, a system includes a tube with a plurality of gas intake apertures on an upstream surface, the tube having a horseshoe shape with a rounded notch on a downstream surface and a plurality of gas exit apertures positioned along a length of the rounded notch and a particulate matter sensor positioned inside the tube. In another examples, a system for sensing particulate matter comprises a first outer tube with a plurality of gas intake apertures on an upstream surface, a second inner tube position within the first outer tube and including a plurality of gas intake apertures on a downstream surface and an opening at a bottom surface for discharging exhaust gasses to an exhaust passage, and a particulate matter sensor positioned within the second inner tube. | 05-12-2016 |
20160131056 | Internal Combustion Engine Having Dedicated Cylinder(s) for Generation of Both EGR and Exhaust Aftertreatment Reformate for Three-Way Catalyst - An exhaust gas recirculation (EGR) system for an internal combustion engine having dedicated EGR and operating at a net stoichiometric air-fuel ratio. In such engines, one or more cylinders is operable as a dedicated EGR cylinder, such that all of the exhaust produced by the dedicated EGR cylinder(s) may be directed back to the intake manifold. Because the engine's exhaust is net stoichiometric, its exhaust aftertreatment system has a three-way catalyst. An EGR loop is configured to recirculate EGR from the dedicated EGR cylinder(s) to the engine's intake manifold. A diversion line, modulated with a valve, connects the EGR loop to the exhaust aftertreatment system, thereby allowing adjustment of the relative amounts of EGR to be recirculated and to be provided to the exhaust system. | 05-12-2016 |
20160138447 | METHOD AND SYSTEM FOR GAS PARTICULATE FILTER - Methods and systems are provided for diagnosing a particulate filter located in an exhaust runner of an engine cylinder. In one example, a method may include flowing exhaust from a first cylinder through a first particulate filter in a first runner, and flowing exhaust from a second cylinder through a second particulate filter in a second runner. The method may further include adjusting engine operation in response to particulate filter degradation, the particulate filter degradation distinguishing between degradation of the first and second particulate filters based on an exhaust pressure pulsation timing relative to combustion events. | 05-19-2016 |
20160138450 | UREA BACKFLOW PREVENTION APPARATUS OF SCR AND CONTROL METHOD THEREOF - A urea backflow prevention apparatus of SCR in an SCR system which injects a urea solution into an exhaust pipe may include: a urea tank to store the urea solution; a nozzle to be installed in the exhaust pipe to inject the urea solution; a supply pump to pump the urea solution; a suction line connecting the urea tank to the supply pump; a pressure line connecting the supply pump to the nozzle; a return line connecting the supply pump to the urea tank to return un-injected urea solution back to the urea tank; and a backflow prevention line connecting the pressure line to the return line. The backflow prevention line keeps pressures of the pressure line, the supply pump directly connected to the pressure line and the suction line indirectly connected to the pressure line equal to an atmospheric pressure after an operation of the SCR system ends. | 05-19-2016 |
20160138452 | Reagent Dosing System And Method Of Dosing Reagent - A reagent dosing system for dosing a reagent into the exhaust gas stream of an internal combustion engine includes a reagent tank for storing a supply of reagent; an injector module including an atomising dispenser and a positive-displacement metering pump which draws reagent from the reagent tank and delivers it to the dispenser; a supply line coupling the reagent tank to the injector module; a dosing control unit operable to control the injector module to inject reagent into the exhaust gas stream; and an additional priming pump arranged, in use, to urge reagent along the supply line toward the injector module under selected conditions. | 05-19-2016 |
20160138498 | INTERNAL COMBUSTION ENGINE PROVIDED WITH A SELECTIVE CATALYTIC REDUCTION SYSTEM - An internal combustion engine (ICE) and method of control are provided to determine a value of a catalyst temperature and a value of a quantity of a reducing agent stored in the catalyst. The quantity of gas recirculated by an exhaust gas recirculation (EGR) system of the ICE is calculated on the basis of the value of the catalyst temperature and of the value of the quantity of the reducing agent stored in the catalyst. This solution makes it possible to adjust the quantity of gas recirculated by the EGR system on the basis of parameters linked to an efficiency of a selective catalytic reduction (SCR) system associated with the ICE, in order to reduce the global quantity of pollutants produced by the ICE and released in the environment. | 05-19-2016 |
20160146077 | EXHAUST SYSTEM USING ASH-COMPENSATING REGENERATION MANAGEMENT - An exhaust system for an engine having a throttle is disclosed. The exhaust system may include an exhaust passage connectable to the engine, a particulate filter disposed in the exhaust passage, a sensor configured to generate a signal indicative of a total pressure differential across the particulate filter caused by soot and ash accumulation, a load actuator configured to selectively adjust a load on the engine, and a control module electronically connected to the load actuator and the sensor. The control module may be configured to determine a compensated pressure differential indicative of an amount of the total pressure differential caused by soot accumulation, a soot load of the particulate filter based on the compensated pressure differential, cause the load actuator to initiate a first engine load increase based on the soot load, track a time elapsed since initiation of the first engine load increase, and cause the load actuator to initiate a subsequent engine load increase when the time elapsed is greater than an elapsed time limit and the soot load is greater than a target soot load. | 05-26-2016 |
20160146081 | SILENCER FOR MID-BED AIR INJECTION MIXING - A system includes an exhaust aftertreatment system configured to treat emissions from a combustion engine. The exhaust aftertreatment system includes a first catalyst assembly having an outlet. The exhaust aftertreatment system also includes an ammonia slip catalyst (ASC) assembly configured to receive a fluid from the first catalyst assembly and to convert ammonia (NH3) within the fluid into nitrogen (N2), wherein the ASC assembly has an inlet. The exhaust aftertreatment system further includes a silencer disposed between the outlet of the first catalyst assembly and the inlet of the ASC assembly, wherein the silencer is configured to receive the fluid and an oxidant for mixing with the fluid provide sufficient oxygen in the fluid flowing into the inlet of the ASC assembly to enable the catalytic activity in the ASC assembly that coverts NH3 into N2, and the silencer is configured to mix the fluid and the oxidant. | 05-26-2016 |
20160146085 | SOx CONCENTRATION DETECTION DEVICE OF INTERNAL COMBUSTION ENGINE - The object of the invention is to detect a concentration of a SOx included in an exhaust gas of an internal combustion engine easily and accurately by a limiting current type sensor. The invention relates to a SOx concentration detection device of the engine having a limiting current type sensor. The device of the invention comprises a detecting part for detecting the concentration of the SOx included in the exhaust gas by using an output current of the sensor while lowering a voltage applied to the sensor from a predetermined voltage. | 05-26-2016 |
20160153329 | PARTICULATE FILTER REGENERATION METHOD OF DIESEL HYBRID VEHICLE | 06-02-2016 |
20160153330 | METHOD OF REGENERATING EXHAUST GAS POST-PROCESSING APPARATUS IN ENGINE-DRIVEN GENERATOR, AND REGENERATION APPARATUS | 06-02-2016 |
20160153332 | Method for cold-start pre-warming of a pressure-charged internal combustion engine and/or of an exhaust gas aftertreatment device | 06-02-2016 |
20160153336 | SYSTEM FOR COOLING VEHICLE SCR AND METHOD FOR CONTROLLING THE SAME | 06-02-2016 |
20160153338 | NITROGEN OXIDE PURIFICATION SYSTEM AND CONTROL METHOD OF THE SAME | 06-02-2016 |
20160160721 | EXHAUST SOOT CONTROL SYSTEM - Systems and methods are described for sensing soot (particulate matter) in an exhaust system of a vehicle. An example system comprises a sensor housing an exhaust inlet, an exhaust outlet, and a soot filter affixed across the exhaust outlet, and a piston with the housing, affixed to a spring via a conductive surface, the spring fluidly separated from the exhaust chamber by a piston seal. The system may further comprise a detection circuit including the conductive surface of a piston and a plurality of resistive elements and a separate regeneration circuit configured to supply electric heat across the soot filter to regenerate the sensor. | 06-09-2016 |
20160160723 | METHOD AND SYSTEM FOR REMOVING ASH WITHIN A PARTICULATE FILTER - Methods and systems are provided for injecting water to reduce an ash load on a PF. In one example, a method may include injecting water from a reservoir to between a PF and a three-way catalyst in order to reduce an ash load. | 06-09-2016 |
20160160725 | Diesel Exhaust Fluid Dosing System for Diesel Engine Aftertreatment Module - A dosing system for dosing diesel exhaust fluid (DEF) into an inlet of a selective catalytic reduction (SCR) aftertreatment module of a diesel engine is described. The dosing system may comprise a DEF supply line configured to deliver the DEF from a pump to a first injector and a second injector at the inlet. The DEF supply line may include a tri-axis connector configured to split the DEF from the pump into two portions each exiting one of a first outlet port and a second outlet port, a first delivery conduit configured to deliver the DEF exiting the first outlet port to the first injector, and a second delivery conduit configured to deliver the DEF exiting the second outlet port to the second injector. The first injector and the second injector may dose the same quantity of the DEF into the inlet of the aftertreatment module. | 06-09-2016 |
20160160729 | FAULT DIAGNOSIS METHOD OF SCR SYSTEM AND AN APPARATUS THEREOF - A fault diagnosis method of an exhaust gas post-processing system may include a detection step detecting any one or more of an operating state of a lean NOx trap or a state of an urea tank, a determination step determining whether the state of the lean NOx trap or the urea tank detected at the detection step satisfies a corresponding condition to block monitoring of a purification efficiency of the exhaust gas post-processing system, and a blocking step blocking the monitoring of the purification efficiency of the exhaust gas post-processing system when the state of the lean NOx trap or the urea tank at the determination step satisfies the corresponding condition to block the monitoring of the purification efficiency of the exhaust gas post-processing system. | 06-09-2016 |
20160160731 | AUXILIARY DIESEL EXHAUST FLUID SYSTEMS - Generator assembly systems and methods of manufacturing and operating generator assembly systems. The generator assembly system includes a generator enclosure, a diesel engine, an aftertreatment exhaust system, a primary diesel exhaust fluid system, and an auxiliary diesel exhaust fluid system. The primary diesel exhaust fluid system includes a primary diesel exhaust fluid storage tank fluidly coupled to the aftertreatment exhaust system. The auxiliary diesel exhaust fluid system includes an auxiliary diesel exhaust fluid storage tank and a transfer pump fluidly coupled to the auxiliary diesel exhaust fluid storage tank. The auxiliary diesel exhaust fluid system is housed in an auxiliary enclosure positioned outside of the generator enclosure. At least one fluid conduit fluidly couples the transfer pump to the primary diesel exhaust fluid storage tank. | 06-09-2016 |
20160160774 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine having a motor and an exhaust gas aftertreatment system having an exhaust gas aftertreatment component, wherein exhaust gas formed in the motor during combustion of fuel is guided via the exhaust gas aftertreatment system for cleaning, includes: determining an exhaust gas actual value that depends upon an actual value of a nitrogen dioxide fraction in the exhaust gas upstream of the exhaust gas aftertreatment component; and changing at least one operating parameter for the motor such that the actual value of the nitrogen dioxide fraction is brought closer to a corresponding reference value for the nitrogen dioxide fraction. | 06-09-2016 |
20160169072 | EXHAUST AFTERTREATMENT SYSTEM AND METHOD | 06-16-2016 |
20160169073 | SYSTEM AND METHOD FOR DIAGNOSING THE SELECTIVE CATALYTIC REDUCTION SYSTEM OF A MOTOR VEHICLE | 06-16-2016 |
20160169074 | AFTERTREATMENT SYSTEM IMPLEMENTING LOW-TEMPERATURE SCR | 06-16-2016 |
20160169077 | SYSTEMS AND METHODS FOR MODEL BASED CONTROL OF CATALYTIC CONVERTER SYSTEMS | 06-16-2016 |
20160169135 | METHOD AND SYSTEM FOR CONTROL OF EMISSIONS IN EXHAUST AFTERTREATMENT SYSTEM | 06-16-2016 |
20160169164 | NATURALLY ASPIRATED COMMON RAIL DIESEL ENGINE MEETING ULTRA LOW PM EMISSION BY PASSIVE EXHAUST AFTER TREATMENT | 06-16-2016 |
20160177793 | METHOD FOR REGENERATING AN EXHAUST GAS AFTERTREATMENT DEVICE | 06-23-2016 |
20160177796 | METHOD FOR OPERATING A DRIVE DEVICE AND CORRESPONDING DRIVE DEVICE | 06-23-2016 |
20160177798 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE | 06-23-2016 |
20160177803 | METHOD FOR CHECKING THE EFFICACY OF AN EXHAUST GAS AFTER-TREATMENT DEVICE | 06-23-2016 |
20160186629 | SYSTEM AND METHOD OF ISOLATING COMPONENT FAILURES IN AN EXHAUST AFTERTREATMENT SYSTEM - An apparatus includes a dosing module structured to suspend dosing in an exhaust aftertreatment system; a selective catalytic reduction (SCR) inlet NOx module structured to interpret SCR inlet NOx data and an SCR inlet temperature; a SCR outlet NOx module structured to interpret SCR outlet NOx data; and a system diagnostic module structured to determine an efficiency of a SCR system based on the SCR inlet and outlet NOx data over a range of SCR temperatures, wherein the system diagnostic module is further structured to determine a state of at least one of a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and the SCR system based on the SCR efficiency at an elevated SCR temperature range and the SCR efficiency at a relatively lower SCR temperature range relative to a high SCR efficiency threshold and a low SCR efficiency threshold. | 06-30-2016 |
20160186630 | NOx SENSOR DIAGNOSTIC FOR AN EXHAUST AFTERTREATMENT SYSTEM - A method for diagnosing NOx sensors in an exhaust aftertreatment system includes suspending reductant dosing in an exhaust aftertreatment system; purging a reductant deposit in a selective catalytic reduction (SCR) system of the exhaust aftertreatment system; adjusting at least one of an ignition timing and an engine speed for an engine to adjust an engine out nitrogen oxide (NOx) amount; receiving measured SCR inlet NOx data from a SCR inlet NOx sensor and measured SCR outlet NOx data from a SCR outlet NOx sensor; determining a phase shift between the measured SCR inlet and SCR outlet NOx data; applying the determined phase shift to the SCR outlet NOx data; and determining a diagnostic feature based on the SCR inlet NOx data and the phase shifted SCR outlet NOx data regarding a state of the SCR inlet and outlet NOx sensors. | 06-30-2016 |
20160186635 | EXHAUST GAS POST-PROCESSING APPARATUS AND METHOD FOR SULFUR OXIDE REMOVAL - The present disclosure relates to an apparatus and a method of post-processing exhaust gas for removing sulfur oxides, and more particularly, relates to an apparatus and a method of post-processing exhaust gas for removing sulfur oxides, in which exhaust gas is produced when fuel is combusted in a diesel internal combustion engine and the exhaust gas is purified by the apparatus for post-processing exhaust gas, and in this case, sulfur oxides (SOx) is produced and stacked in a catalytic device (diesel oxidation catalyst (DOC) and selective catalytic reduction (SCR)) equipped in the apparatus for post-processing exhaust gas during a process of purifying the exhaust gas, and the sulfur oxides is removed. | 06-30-2016 |
20160186638 | DETERIORATION DIAGNOSIS DEVICE FOR AN EXHAUST GAS PURIFICATION APPARATUS - In an deterioration diagnosis device for the exhaust gas purification apparatus in which in a period of time in which inducement processing is carried out which is to induce a water-gas-shift-reaction in a catalyst disposed at the upstream side of the SCR catalyst, by changing an air fuel ratio of exhaust gas discharged from an internal combustion engine from a lean air fuel ratio into a predetermined rich air fuel ratio, an air fuel ratio of exhaust gas flowing into the SCR catalyst and an air fuel ratio of exhaust gas flowing out from the SCR catalyst are measured by the air fuel ratio sensors, respectively, so that deterioration of the SCR catalyst is diagnosed based on a difference between the measured values of these sensors, wherein an end time of the execution of the inducement processing is adjusted in such a manner that an amount of hydrogen oxidized in the SCR catalyst during the period of the execution of the inducement processing becomes constant. | 06-30-2016 |
20160186672 | THERMAL MANAGEMENT OF EXHAUST GAS VIA CYLINDER DEACTIVATION - An apparatus includes an engine load module structured to detect an engine operating state of the engine and generate an engine status report; a timing module structured to receive the engine status report and generate a cylinder request after the engine has been in a certain engine operating state for a certain period of time; and a cylinder module structured to receive the cylinder request and generate a cylinder command to be sent to the engine to deactivate a portion of combustion cylinders based on the engine operating state existing for the certain period of time. | 06-30-2016 |
20160186679 | SYSTEM AND METHOD FOR REGULATING EXHAUST GAS RECIRCULATION IN AN ENGINE - The present disclosure includes a system and method for regulating exhaust gas recirculation (“EGR”) in an engine. In one embodiment, the system may include a knock sensor coupled to the engine that sends a signal corresponding to at least one operating condition of the engine to a controller. The controller may estimate an amount of EGR gas administered to the engine and regulate the amount of EGR gas being administered to the engine when the estimated amount of EGR gas is not an effective amount. | 06-30-2016 |
20160194996 | DIESEL EXHAUST SYSTEM AND METHOD FOR CONTROLLING EXHAUST FLUID DOSING | 07-07-2016 |
20160194998 | SECONDARY-AIR SYSTEM AND METHOD FOR CHECKING THE OPERABILITY OF THE SECONDARY-AIR SYSTEM | 07-07-2016 |
20160195030 | EXHAUST GAS PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE AND EXHAUST GAS PURIFICATION METHOD OF INTERNAL COMBUSTION ENGINE | 07-07-2016 |
20160195032 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE | 07-07-2016 |
20160201532 | IDLE SPEED GPF REGENERATION | 07-14-2016 |
20160201534 | EMISSION CONTROL DEVICE REGENERATION | 07-14-2016 |
20160201536 | METHOD OF OPERATING A DOSING DEVICE | 07-14-2016 |
20160251988 | CONTROL APPARATUS AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE | 09-01-2016 |
20160251989 | SYSTEMS AND METHODS FOR DIFFERENTIAL HEATING OF EXHAUST CATALYSTS | 09-01-2016 |
20160252028 | INTERNAL COMBUSTION ENGINE EQUIPPED WITH AN AFTERTREATMENT DEVICE | 09-01-2016 |
20160376962 | METHOD OF REGENERATING LEAN NOx TRAP OF EXHAUST PURIFICATION SYSTEM PROVIDED WITH LEAN NOx TRAP AND SELECTIVE CATALYTIC REDUCTION CATALYST AND EXHAUST PURIFICATION SYSTEM - A method of regenerating a lean NOx trap (LNT) of an exhaust purification system provided with the LNT and a selective catalytic reduction (SCR) catalyst may include: determining whether a regeneration release condition of the LNT is satisfied; determining whether a regeneration demand condition of the LNT is satisfied; and performing regeneration of the LNT if the regeneration release condition of the LNT and the regeneration demand condition of the LNT are satisfied. In particular, the regeneration demand condition of the LNT is satisfied if a NOx adsorption in the LNT is larger than or equal to a threshold NOx adsorption, and the threshold NOx adsorption is set to a minimum value of a target NOx adsorption in the LNT which changes according to a maximum NOx adsorption in the LNT in cold starting and a NOx purification efficiency of the SCR catalyst. | 12-29-2016 |
20160376963 | METHOD OF REGENERATING LEAN NOx TRAP OF EXHAUST PURIFICATION SYSTEM PROVIDED WITH LEAN NOx TRAP AND SELECTIVE CATALYTIC REDUCTION CATALYST AND EXHAUST PURIFICATION SYSTEM - A method of regenerating a lean NOx trap (LNT) of an exhaust purification system provided with the LNT and a selective catalytic reduction (SCR) catalyst may include: determining whether a regeneration release condition of the LNT is satisfied; determining whether a regeneration demand condition of the LNT is satisfied; and performing regeneration of the LNT if the regeneration release condition of the LNT and the regeneration demand condition of the LNT are satisfied. In particular, the regeneration release condition of the LNT is satisfied if all of an engine operating condition, an LNT state condition, and a lambda sensor synchronization condition are satisfied. | 12-29-2016 |
20160376973 | METHOD OF DIAGNOSING FAILURE OF SCR SYSTEM - The present disclosure provides a method of diagnosing a failure of a Selective Catalytic Reduction (SCR) system, the method including: injecting urea into the interior of an exhaust pipe using an injector; after the injection step, detecting an amount of NOx and an amount of ammonia through an NOx sensor provided at a rear end of the exhaust pipe; and diagnosing a failure of the injector based on at least one of the amount of NOx and the amount of ammonia. | 12-29-2016 |
20160377006 | METHOD OF OPERATING A LOW PRESSURE EGR VALVE IN A LOW PRESSURE EGR ROUTE OF AN INTERNAL COMBUSTION ENGINE - A method is disclosed for operating a low pressure EGR valve in a low pressure EGR route of an internal combustion engine equipped with an aftertreatment system having a urea injector upstream of a Selective Catalytic Reduction on Filter (SCRF). During a regeneration procedure of the SCRF, an enabling condition is monitored for opening the low pressure EGR valve of the low pressure EGR route when enabling condition is satisfied. The enabling condition may be satisfied if a urea injection is not performed. | 12-29-2016 |
20170233260 | PROCESSES USING MOLECULAR SIEVE SSZ-102 | 08-17-2017 |
20170234184 | SYSTEM AND METHOD FOR EXHAUST TREATMENT | 08-17-2017 |
20170234185 | EXHAUST GAS PURIFICATION CATALYST DEVICE, EXHAUST GAS PURIFICATION SYSTEM, AND METHOD FOR DETECTING DETERIORATION OF EXHAUST GAS PURIFICATION CATALYST DEVICE | 08-17-2017 |
20170234189 | SCR AFTER-TREATMENT OF ENGINE EXHAUST GAS | 08-17-2017 |
20170234196 | METHOD AND SYSTEM FOR REDUCING PARTICULATE EMISSIONS | 08-17-2017 |
20170234197 | VEHICLE OXIDATION CATALYST DIAGNOSTIC STRATEGY | 08-17-2017 |
20170234198 | SYSTEM AND METHOD FOR PARTICULATE FILTER REGENERATION | 08-17-2017 |
20170234534 | OXYGEN AND NITROGEN ENRICHMENT OF ATMOSPHERIC AIR USING AN IMPELLER-BASED APPARATUS | 08-17-2017 |
20170234535 | OXYGEN ENRICHMENT OF ATMOSPHERIC AIR USING RELATIVE MOTION | 08-17-2017 |
20180023430 | INTERNAL COMBUSTION ENGINE AND EXHAUST-GAS-COMPONENT ESTIMATING METHOD | 01-25-2018 |
20180023431 | METHODS AND SYSTEMS FOR INCREASING PARTICULATE MATTER DEPOSITION IN AN EXHAUST PARTICULATE MATTER SENSOR | 01-25-2018 |
20180023433 | EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE | 01-25-2018 |
20180023437 | EXHAUST GAS PURIFICATION APPARATUS FOR AN INTERNAL COMBUSTION ENGINE | 01-25-2018 |
20180023440 | SYSTEM AND METHOD OF PURIFYING EXHAUST GAS | 01-25-2018 |
20180023491 | AIR CONTROL VALVE FOR TRANSPORTATION REFRIGERATION SYSTEM | 01-25-2018 |