Patent application number | Description | Published |
20100086458 | METHOD AND ARCHITECTURE FOR OXIDIZING NITRIC OXIDE IN EXHAUST GAS FROM HYDROCARBON FUEL SOURCE WITH A FUEL LEAN COMBUSTION MIXTURE - An after-treatment system architecture and method for oxidizing the nitric oxide component of an exhaust stream from a hydrocarbon fueled power source operated with a fuel lean combustion mixture. | 04-08-2010 |
20100186390 | TECHNIQUE FOR PRODUCTION OF AMMONIA ON DEMAND IN A THREE WAY CATALYST FOR A PASSIVE SELECTIVE CATALYTIC REDUCTION SYSTEM - A method for controlling a powertrain includes selectively initiating an ammonia generation cycle, including injecting fuel into a combustion chamber of an engine before a primary combustion event to a calibrated air fuel ratio in a range lean of stoichiometry based upon generation of NOx within the combustion chamber, injecting fuel into the combustion chamber after the primary combustion event based upon an overall air fuel ratio in a range rich of stoichiometry and resulting generation of molecular hydrogen, and utilizing a catalyst device between the engine and a selective catalytic reduction device to produce ammonia. | 07-29-2010 |
20100186391 | TECHNIQUE FOR PRODUCTION OF AMMONIA ON DEMAND IN A THREE WAY CATALYST FOR A PASSIVE SELECTIVE CATALYTIC REDUCTION SYSTEM - A method for controlling a powertrain includes selectively initiating an ammonia generation cycle including injecting fuel into a combustion chamber of an engine before a primary combustion event to a calibrated air fuel ratio in a range lean of stoichiometry based upon generation of NOx within the combustion chamber, injecting fuel into the powertrain after the primary combustion event based upon an overall air fuel ratio in a range rich of stoichiometry and resulting generation of molecular hydrogen, utilizing a hydrogen forming catalyst to reform the injected fuel, and utilizing a catalyst device between the engine and the selective catalytic reduction device to produce ammonia. | 07-29-2010 |
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 |
20100233045 | SULFUR TOLERANT PEROVSKITE SUPPORTED CATALYSTS - A sulfur tolerant oxidation catalyst with appreciable NO and HC oxidation capabilities has been developed for use in any component of an exhaust aftertreatment system for a lean-burn engine where the oxidation of at least NO is desired. Several non-exclusive examples of such components where the oxidation catalyst may be employed include a DOC and a LNT. The oxidation catalyst may comprise perovskite oxide particles that support palladium particles. The ability of the palladium supported perovskite oxide particles to concurrently oxidize NO and HC's can significantly diminish or altogether eliminate the use of platinum in the exhaust aftertreatment system for at least NO oxidation. The oxidation catalyst, moreover, may exhibit superior thermal durability and better NO and HC oxidation activities than platinum in some instances. | 09-16-2010 |
20100293930 | METHOD AND APPARATUS FOR AMMONIA FORMATION IN A CATALYTIC CONVERTER - An exhaust gas aftertreatment system for treating an engine-out exhaust gas feedstream of a spark-ignition direct-injection engine includes a multi-stage catalytic converter comprising a converter inlet, a converter outlet, and a substrate having a first end associated with the converter inlet and a second end associated with the converter outlet. The substrate further includes a multiplicity of flow passages between the first and second ends of the substrate, a first surface location corresponding to the first end of the substrate, and a second surface location corresponding to the second end of the substrate. A first washcoat stage is applied to the substrate at the first surface location corresponding to the first end of the substrate. A second washcoat stage is applied to the substrate at the second surface location corresponding to the second end of the substrate. The first and second washcoat stages include washcoats formulated to generate hydrogen and ammonia from the engine-out exhaust gas feedstream. An ammonia-selective catalytic reduction device is downstream of the first and second washcoat stages. | 11-25-2010 |
20110070139 | CATALYST COMBINATIONS AND METHODS AND SYSTEMS FOR OXIDIZING NITRIC OXIDE IN A GAS STREAM - One embodiment of the invention may include a product comprising a catalyst combination comprising a perovskite catalyst and a second catalyst that is not a perovskite catalyst. | 03-24-2011 |
20110076212 | METHODS AND SYSTEMS FOR OXIDIZING NITRIC OXIDE IN A GAS STREAM - An after-treatment system architecture and method for oxidizing the nitric oxide component of a gas stream. | 03-31-2011 |
20110082030 | WASHCOATING TECHNIQUE FOR PEROVSKITE CATALYSTS - Precursor cations of A and B elements of an ABO | 04-07-2011 |
20120003511 | LITHIUM ION BATTERY FAILURE MITIGATION - A method of mitigating battery cell failure is provided. In one embodiment, the method includes providing a coupling between a battery pack and an internal combustion engine exhaust system, the coupling comprising: a duct positioned between the battery pack and the internal combustion engine exhaust system, the duct including at least one one-way valve positioned to allow battery cell exhaust to pass from the battery cell to the internal combustion engine exhaust system; detecting a thermal event; activating a fan, an air pump, or both in response to the thermal event to force the battery cell exhaust through the coupling; and treating the battery cell exhaust in the internal combustion engine exhaust system. Battery failure mitigation systems are also described. | 01-05-2012 |
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 |
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 |
20120134907 | COATED PEROVSKITE-BASED CATALYSTS, CATALYST COMBINATIONS AND METHODS OF TREATING A GAS STREAM - One embodiment of the invention includes a method of treating a gas stream comprising flowing the gas stream over a hydrocarbon reduction and NO | 05-31-2012 |
20120159927 | PEROVSKITE OXIDE COMPOUNDS FOR USE IN EXHAUST AFTERTREATMENT SYSTEMS - A method for removing NO | 06-28-2012 |
20120159935 | PEROVSKITE-BASED CATALYSTS, CATALYST COMBINATIONS AND METHODS OF MAKING AND USING THE SAME - One embodiment of the invention may include a method comprising providing a product comprising a substrate comprising a perovskite catalyst, NO | 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 |
20120180453 | SULFUR-TOLERANT PEROVSKITE NOx OXIDATION CATALYSTS - A method for catalytic oxidation of NO to NO | 07-19-2012 |
20120180558 | METHOD FOR MONITORING EXHAUST GAS AFTERTREATMENT DEVICES - A method for monitoring performance of a passive selective catalytic reduction system includes operating the internal combustion engine in a preconditioning mode. Subsequent to the preconditioning, an air/fuel excursion is introduced into the exhaust gas feedstream and a signal output from a sensor monitoring the exhaust gas feedstream in the selective catalytic reduction system during the air/fuel excursion is monitored. An operating effectiveness is determined for the selective catalytic reduction system correlated to the signal output from the sensor monitoring the exhaust gas feedstream. | 07-19-2012 |
20120183467 | LOW TEMPERATURE OXIDATION OF AMMONIA IN NITRIC ACID PRODUCTION - Ammonia in a gas stream comprising oxygen and nitrogen may be effectively completely oxidized to a mixture of NO and NO | 07-19-2012 |
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 |
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 |
20120311998 | SYSTEM AND METHOD FOR DETERMINING AN AMMONIA GENERATION RATE IN A THREE-WAY CATALYST - A system according to the principles of the present disclosure includes a rate determination module, a storage level determination module, and an air/fuel ratio control module. The rate determination module determines an ammonia generation rate in a three-way catalyst based on a reaction efficiency and a reactant level. The storage level determination module determines an ammonia storage level in a selective catalytic reduction (SCR) catalyst positioned downstream from the three-way catalyst based on the ammonia generation rate. The air/fuel ratio control module controls an air/fuel ratio of an engine based on the ammonia storage level. | 12-13-2012 |
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 |
20130019589 | EXHAUST AFTERTREATMENT SYSTEM FOR COMPRESSION-IGNITION ENGINES - An internal combustion engine configured to operate in a compression-ignition combustion mode includes an exhaust aftertreatment system. The exhaust aftertreatment system includes a catalyst device fluidly coupled upstream of an ammonia-selective catalytic reduction device. The, catalyst device includes first, second, and third elements fluidly coupled in series. The first element includes a three-way catalytic element, the second element includes a NOx adsorber, and the third element includes an oxidation catalytic element. | 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 |
20130034911 | OZONE CONVERSION SENSORS FOR AN AUTOMOBILE - A system for a vehicle includes a first ozone sensor that generates a first sensor signal indicating a first amount of ozone in air flowing into a radiator. A second ozone sensor generates a second sensor signal indicating a second amount of ozone in air flowing out of the radiator. A control module receives the first sensor signal and the second sensor signal and determines an ozone conversion rate based on the first sensor signal and the second sensor signal. | 02-07-2013 |
20130061576 | SELECTIVE CATALYTIC REDUCTION (SCR) DEVICE CONTROL SYSTEM - An exhaust gas treatment system for an internal combustion engine is provided, including an exhaust gas conduit, an oxidation catalyst (“OC”) device, an electrically heated catalyst (“EHC”) device, a selective catalytic reduction (“SCR”) device, and a control module. The OC device is in fluid communication with the exhaust gas conduit. The OC device adsorbs hydrocarbons and is selectively activated to induce oxidation of the hydrocarbons in the exhaust gas. The EHC device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The EHC device is located within the OC device and is selectively activated to produce heat and induce further oxidation of the exhaust gas. The EHC device has an oxidation catalyst compound disposed thereon for converting nitrogen oxide (“NO”) to nitrogen dioxide (“NO | 03-14-2013 |
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 |
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 |
20130085063 | METHOD AND APPARATUS FOR PREPARING A CATALYST - A method for preparing a catalyst includes preparing a first solution including a gold precursor and a palladium precursor, preparing an alumina suspension, heating the alumina suspension to a preferred temperature range, introducing the first solution to the alumina suspension and coincidently maintaining the pH of a resulting solution at a preferred pH level, separating solids in the resulting solution, and calcining the separated solids to form a catalyst including gold and palladium co-deposited onto alumina. | 04-04-2013 |
20130091826 | COLD START NO2 GENERATION SYSTEM - A cold start NO | 04-18-2013 |
20130152553 | Selective Catalytic Reduction (SCR) System For NOx Storage - An exhaust gas treatment system for an internal combustion engine is provided, including an exhaust gas conduit, a flow-through container of absorbent particles, an electrically heated catalyst (“EHC”) device, a selective catalytic reduction (“SCR”) device, 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 | 06-20-2013 |
20130239552 | CONTROL SYSTEM FOR REDUCING NITROUS OXIDE ("N2O") AFTER SELECTIVE CATALYTIC REDUCTION ("SCR") DEVICE LIGHT-OFF - An exhaust gas treatment system for an internal combustion engine is provided having an exhaust gas conduit, an oxidation catalyst (“OC”) device, a selective catalytic reduction (“SCR”) device, and a control module. The internal combustion engine has at least one operating parameter. 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 | 09-19-2013 |
20130239554 | EXHAUST GAS TREATMENT SYSTEM HAVING A SOLID AMMONIA GAS PRODUCING MATERIAL - An exhaust gas treatment system for an internal combustion engine is provided, including an exhaust gas conduit, a pressurized vessel, a selective catalytic reduction (“SCR”) device, and a control module. The internal combustion engine has a plurality of pistons and an engine off condition that indicates that the pistons are generally stationary. The exhaust gas conduit is in fluid communication with, and configured to receive an exhaust gas from the internal combustion engine. The pressurized vessel stores a solid ammonia gas producing material. The pressurized vessel is selectively activated to heat the solid ammonia gas producing material into an ammonia gas. The ammonia gas is released into the exhaust gas conduit. The SCR device is in fluid communication with the exhaust gas conduit and is configured to receive the ammonia gas. | 09-19-2013 |
20130259779 | CARBON MONOXIDE-SELECTIVE OXIDATION CATALYSTS - Particles of mixed oxides of cerium, zirconium, and copper (CeZrCuO | 10-03-2013 |
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 |
20140060014 | ELECTRICALLY HEATED CATALYST DEVICE HAVING A VARIABLE RESISTANCE MONOLITH - An exhaust gas treatment system for an internal combustion engine is provided and includes an exhaust gas conduit, a generator, an electrically heated catalyst (“EHC”) device, 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 generator operates at a generator speed to produce electrical power. The EHC device is in fluid communication with the exhaust gas conduit. The EHC device includes a monolith structure that is divided into a plurality of segments that define discrete resistive paths. The resistive paths are selectively connected to the generator for receiving electrical power. The control module is in communication with the EHC device, the generator, and the internal combustion engine. The control module includes control logic for determining the generator speed. | 03-06-2014 |
20140147339 | DIESEL OXIDATION CATALYST AGING LEVEL DETERMINATION USING NOX SENSOR NO2 INTERFERENCE - A method of determining aging of a diesel oxidation catalyst (DOC) in an engine exhaust system includes receiving a first sensor signal from a first nitrogen oxides (NOx) sensor positioned in exhaust flow upstream of the DOC. The first sensor signal is indicative of an amount of NOx in the exhaust flow upstream of the DOC. The method further includes receiving a second sensor signal from a second NOx sensor positioned in exhaust flow downstream of the DOC. The second sensor signal is indicative of an amount of NOx downstream of the DOC. A difference between the first sensor signal and the second sensor signal is calculated via a controller. A DOC aging level based on a predetermined correlation between the difference and DOC aging is then determined by the controller. | 05-29-2014 |
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 |
20140278003 | REJUVENATION CONTROL OF PALLADIUM-ONLY DIESEL OXIDATION CATALYST - A method is disclosed for assessing and maintaining the use of a palladium-only (i.e., platinum free) oxidation catalyst body to oxidize carbon monoxide and hydrocarbons in the exhaust stream of a diesel engine powered vehicle, which is operated at a fuel-lean air-to-fuel ratio (A/F) for much of the time it powers a vehicle. Periodically, a recent history of the temperatures of the exhaust gas at the inlet to the palladium oxidation catalyst body is prepared in a computer control module. And a recent history of the A/F of the operating engine is considered. These temperature and A/F values are then used in determining whether the engine should be temporarily operated in a fuel-rich or stoichiometric A/F mode to provide an exhaust gas composition suitable for rejuvenation of the palladium by reducing its oxide formed during lean operation of the engine. | 09-18-2014 |
20140352303 | WASTE HEAT RECOVERY SYSTEM WITH INTEGRATED HYDROCARBON ADSORBER, AND METHOD THEREOF - A waste heat recovery system with an integrated hydrocarbon adsorber for a vehicle having an internal combustion engine that generates exhaust gas containing hydrocarbons, and a catalytic converter, includes an exhaust gas conduit, an exhaust gas heat exchanger, a heat exchanger bypass valve, a coolant circuit with a coolant bypass and a coolant bypass valve, and a controller. The exhaust gas heat exchanger includes at least one channel through which the exhaust gas is flowable, the channel having an interior surface coated with a hydrocarbon adsorbing material configured to adsorb hydrocarbons. The heat exchanger and coolant bypass valves are configured to selectively direct at least a portion of the exhaust gas and the coolant, respectively, to the exhaust gas heat exchanger or to bypass it. They are controlled by the controller such that the hydrocarbons in the exhaust gas are selectively adsorbable by and desorbable from the coating. | 12-04-2014 |
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 |