| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 060284000 | Automatic or timed reactor purge or heat-up in engine starting operation | 27 |
| 20080216465 | Internal Combustion Engine Control Apparatus and Control Method of Internal Combustion Engine - The internal combustion engine control apparatus of the invention starts gradually delaying an ignition timing θ for catalyst warm-up, immediately after a start of an internal combustion engine. When the ignition timing θ is delayed to or below a preset reference timing θref, a fuel amount increase flag F | 09-11-2008 |
| 20080216466 | Sulfur Purge Control Device For An Internal Combustion Engine - In a control device for an internal combustion engine provided with a NOx catalytic converter in an exhaust passage thereof, the progress of an undesired substance removal process is computed from the consumption of the reducing agent contained in the exhaust gas in the NOx catalytic converter. The undesired substance may include sulfur contents and NOx captured in the NOx catalytic converter. This computation may be based on the air fuel ratio of the exhaust gas upstream of the NOx catalytic converter and the estimated consumption of the reducing agent contained in the exhaust gas or on the difference between the air fuel ratios of the exhaust gas upstream and downstream of the NOx catalytic converter. In either case, the accuracy can be improved by taking into account the space velocity of the exhaust gas. | 09-11-2008 |
| 20080236144 | CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING THE SAME - An internal combustion engine has an exhaust passage provided with a catalyst to purify exhaust gas. A control system for the internal combustion engine performs a quick-warming control to accelerate warming up of the catalyst when a predetermined condition is satisfied after the internal combustion engine begins cold startup. The control system further performs an advance control to advance an ignition timing further than an idling-ignition timing at the time of an idling operation in a period between beginning of the cold startup of the internal combustion engine and a time point where the quick-warming control is started. | 10-02-2008 |
| 20080282673 | Hybrid cold start strategy using electrically heated catalyst - A method of operating an engine control system includes generating an engine start signal, determining whether a cold start condition exists, energizing an electrically heated catalyst based on the cold start condition, determining the temperature of the electrically heated catalyst and selectively starting an engine based on the engine start signal and the electrically heated catalyst temperature. | 11-20-2008 |
| 20090049823 | METHOD AND APPARATUS FOR OPERATING AN EMISSION ABATEMENT SYSTEM - A method for operating an emission abatement assembly ( | 02-26-2009 |
| 20090077947 | Sulfur purge control method for exhaust gas purifying system and exhaust gas purifying system - In an exhaust gas purifying system ( | 03-26-2009 |
| 20090120065 | 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. | 05-14-2009 |
| 20100005784 | After-Treatment De-Contamination System - In one aspect an internal combustion engine assembly may be provided that may include at least one combustion chamber and an exhaust system with an after-treatment system that may have an oxidation catalyst and a particulate filter. The internal combustion engine assembly may include an electronic controller that may have a de-contamination function that may, responsive to a command be configured to de-contaminate the particulate filter and the oxidation catalyst. To that end, a method may be provided to, and the controller may be configured to increase the exhaust gas temperature at an inlet of the after-treatment system to above a de-contamination temperature during a certain time period. | 01-14-2010 |
| 20100024396 | HYDROCARBON RETAINING AND PURGING SYSTEM - Method and systems are provided for operating an engine having a hydrocarbon retaining system coupled to an engine exhaust and an engine intake. One example method comprises, during an engine cold start, routing exhaust gas to the hydrocarbon retaining system to store hydrocarbons in the hydrocarbon retaining system. The method further comprises, during a first purging condition where the exhaust gas is at a first temperature, purging the hydrocarbon retaining system with at least exhaust gas, and during a second purging condition where the exhaust gas is at a second temperature, said second temperature being higher than said first temperature, mixing the exhaust gas with an amount of fresh air to form a purging gas mixture, and purging the hydrocarbon retaining system with said purging gas mixture. | 02-04-2010 |
| 20100064665 | METHOD AND DESULFURIZING NITROGEN OXIDE STORAGE CATALYSTS IN THE EXHAUST GAS SYSTEM OF A LEAN MIX ENGINE - Lean burn engines require an exhaust gas system comprising nitrogen oxide storage catalysts for removal of nitrogen oxides from their exhaust gases. When the lean burn engine is operated with a sulphur-containing exhaust gas, the storage catalysts have to be desulphurized from time to time. During the desulphurization, there is the risk of high pollutant emissions. These emissions can be reduced when the cylinders of the lean burn engine are combined in two groups which release their exhaust gas to two assigned exhaust legs, in each of which is arranged at least one nitrogen oxide storage catalyst. The two exhaust legs are combined beyond the storage catalysts to form a common exhaust leg which contains a catalyst which possesses a three-way function under stoichiometric conditions. The two nitrogen oxide storage catalysts are desulphurized offset in time with respect to one another. While rich exhaust gas at a high temperature flows through one storage catalyst for desulphurization, lean exhaust gas flows through the second storage catalyst, in such a way that the combined exhaust gas is of stoichiometric composition over the entire desulphurization period. Under the stoichiometric conditions, the catalyst with three-way function is capable of converting hydrocarbons, carbon monoxide and nitrogen oxides to harmless components. | 03-18-2010 |
| 20100122521 | Method for purging a dosing system - A method for purging reductant from a reductant supply system is disclosed. The method includes dispensing reductant into an exhaust system via a dispensing device. The method also includes purging the dispensing device by urging reductant from the dispensing device to a reductant source. | 05-20-2010 |
| 20100122522 | EXHAUST GAS PURIFICATION SYSTEM FOR ENGINEERING MACHINE - An exhaust gas purification system for an engineering machine is capable of avoiding decreases in working efficiency during regeneration control by burning off a deposit of particulate matter from a filter efficiently during a work pause time. An operating section | 05-20-2010 |
| 20110056189 | CONTROL DEVICE FOR VEHICLE - In a vehicle having mounted therein an engine including an injector that directly injects fuel into a cylinder, in the case in which a warm-up control required condition is established, catalyst warm-up control is executed if an amount of fuel diluted in oil is low, or even if the amount of fuel diluted in oil is high, when the temperature of the engine oil is less than the fuel volatilization temperature. In contrast, even in the case in which the warm-up control required condition is established, if the amount of fuel diluted in oil is greater than or equal to a determination value, and furthermore the temperature of the engine oil is greater than or equal to the fuel volatilization temperature, there is the possibility of negative influence on exhaust emissions, and therefore the catalyst warm-up control is prohibited. | 03-10-2011 |
| 20110088373 | METHOD AND AFTERTREATMENT CONFIGURATION TO REDUCE ENGINE COLD-START NOx EMISSIONS - Systems and methods for reducing NOx emissions using a branched exhaust system with a first and second turbine including an emission-control device containing a zeolite, are described. In one example approach, a method comprises: during a first duration when exhaust temperature is below a first temperature threshold, directing exhaust gas through the second turbine and the emission-control device, and adjusting the second turbine to control intake boost; and during a second duration following the first, directing exhaust gas through the first turbine, and adjusting the first turbine to control intake boost. The emission-control device may be purged when exhaust temperature is above a second temperature threshold higher than the first temperature threshold, where during the second duration exhaust gas does not flow through the emission-control device. | 04-21-2011 |
| 20110154807 | NOx TRAP - A NOx trap comprises components comprising at least one platinum group metal, at least one NOx storage material and bulk ceria or a bulk cerium-containing mixed oxide deposited uniformly in a first layer on a honeycombed substrate monolith, the components in the first layer having a first, upstream, zone having increased activity relative to a second, downstream zone for oxidising hydrocarbons and carbon monoxide, and a second, downstream, zone having increased activity to generate heat during a desulphation event, relative to the first zone, wherein the second zone comprises a dispersion of rare earth oxide, wherein the rare earth oxide loading in the second zone is greater than the loading in the first zone. An exhaust system for a lean burn internal combustion engine, a vehicle comprising a lean burn internal combustion engine and the exhaust system and methods of making the NOx trap are also disclosed. | 06-30-2011 |
| 20120222407 | CATALYST WARMING-UP CONTROLLER FOR INTERNAL COMBUSTION ENGINE - A catalyst warming-up controller executes a catalyst warming-up control in which an ignition timing is retarded to warm-up a catalyst and performs a compression-stroke injection in which a fuel is injected into a cylinder in a compression stroke. While the catalyst warming-up control is executed, a variable valve timing controller controls a valve timing of an intake valve and/or an exhaust valve to establish a negative-valve-overlap period in which both of the exhaust valve and the intake valve are closed. A fuel injector injects the fuel into a cylinder in this period and a quantity of the compression-stroke injection is decreasingly corrected according to the injection quantity in the above period. | 09-06-2012 |
| 20140026544 | SYSTEM FOR PROVIDING POWER TO AN ELECTRICALLY HEATED CATALYST - An exhaust gas treatment system for an internal combustion engine is provided. The exhaust gas system includes an exhaust gas conduit, a generator, a vehicle electrical system, a primary energy storage device, a rechargeable secondary energy storage device, an electrically heated catalyst (“EHC”) device, and a control module. The primary energy storage device is selectively connected to the generator. The primary energy storage device has a threshold state of charge (“SOC”). The rechargeable secondary energy storage device is selectively connected to the generator and the vehicle electrical system. The EHC device is in fluid communication with the exhaust gas conduit. The EHC device has an electric heater that is selectively connected the generator for receiving energy and a selectively activated catalyst that is heated to a respective light-off temperature. | 01-30-2014 |
| 20140083084 | Engine System - To provide a configuration that can discharge condensed water remaining in an exhaust gas passage in an engine in which a catalyst is placed in the exhaust gas passage. An engine system ( | 03-27-2014 |
| 20150128572 | EXHAUST GAS CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas control apparatus for an internal combustion engine, controls an exhaust operation of the internal combustion engine ( | 05-14-2015 |
| 20150128573 | DIESEL ENGINE FLUID COOLANT SYSTEM HAVING A SOLENOID-POWERED GATE VALVE - A diesel engine fluid reservoir system having a reservoir of diesel exhaust fluid in thermal communication with a heating element, a first conduit for the flow of engine coolant fluid to the heating element, a temperature sensor disposed to sense ambient temperature and/or a temperature of the diesel exhaust fluid, a controller communicatively coupled to the temperature sensor and communicatively coupled to a sprung gate valve included in the first conduit. The gate valve has a no-flow position and a flow position for control of the flow of engine coolant and includes an endless elastic band sandwiched between a first gate member and a second gate member each defining an opening therethrough alignable with the first conduit in the flow position. In response to a sensed temperature at which the diesel exhaust fluid is frozen, the controller signals the gate valve to be in the flow position. | 05-14-2015 |
| 20160115890 | Control Device for Internal Combustion Engine - The invention relates to a control device for an internal combustion engine using the center-of-gravity position of a heat generation rate for combustion control. This control device controls the center-of-gravity position of a heat generation rate to correspond to a reference position in a case where an engine cooling water temperature is equal to or higher than a reference cooling water temperature and controls the center-of-gravity position of a heat generation rate to correspond to a crank angle further on an advance side than the reference position in a case where the engine cooling water temperature is lower than the reference cooling water temperature. | 04-28-2016 |
| 20160186627 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, a hydrocarbon feed valve ( | 06-30-2016 |
| 20160186680 | EXHAUST GAS PURIFICATION SYSTEM AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification system including a catalyst device configured to recover a purification capacity of a catalyst by an air-fuel ratio richness control, based on a richness control permission range where the air-fuel ratio richness control is permitted to be performed, and a richness control prohibition range where the air-fuel ratio richness control is prohibited from being performed. A catalyst temperature of the catalyst device and an air intake amount of an internal combustion engine are parameters for determining the richness control permission range or the richness control prohibition range. The richness control prohibition range is set as a range where the catalyst temperature of the catalyst device is lower than a preset lower limit catalyst temperature and the air intake amount is larger than a preset upper limit air intake amount. The lower limit catalyst temperature is set to a temperature lower than a catalyst activation temperature. This makes it possible to reduce HC and NOx slip amounts and raise the catalyst temperature when the temperature is low. | 06-30-2016 |
| 20160251993 | EXHAUST GAS TEMPERATURE CONTROL APPARATUS AND EXHAUST GAS TEMPERATURE ADJUSTMENT APPARATUS | 09-01-2016 |
| 20160376966 | GASEOUS EMISSIONS TREATMENT STRUCTURES WITH INDUCTION HEATING - A gaseous emissions treatment assembly has a honeycomb ceramic substrate body with a plurality of cells for passage of exhaust gases. Respective lengths of metal wire are located in a number of the cells. An induction heating coil is mounted adjacent the substrate body for generating a varying electromagnetic field, thereby inductively to heat the lengths of wire and thereby to heat the substrate body. | 12-29-2016 |
| 20190143954 | CONTROLLER FOR INTERNAL COMBUSTION ENGINE | 05-16-2019 |
| 20220136420 | METHODS AND SYSTEMS FOR AN ENGINE - Methods and systems are provided for an engine of a vehicle. In one example, a method includes activating a heater in response to an engine start request when a catalyst temperature is less than a threshold temperature. | 05-05-2022 |
