Patent application number | Description | Published |
20080250776 | Mixing Apparatus for an Exhaust After-Treatment System - A mixing apparatus mountable within a generally cylindrical passage defined by an exhaust gas conduit of an exhaust gas after-treatment system is provided. The passage includes an outer region and an inner region operable to convey an exhaust stream and a liquid stream, such as a urea stream. The mixing apparatus includes a retainer ring operable to retain the mixing apparatus within the passage. A first plurality of fins extends from the retainer ring and is operable to impart a rotational velocity component in a first direction to the exhaust stream and urea stream in the outer region of the passage. A second plurality of fins extends from the retainer ring and is operable to impart a rotational velocity component in a second direction, opposite the first direction, to the exhaust stream and urea stream in the inner region of the passage. | 10-16-2008 |
20080295496 | INJECTION ANTI-COKING SYSTEM FOR PARTICULATE FILTERS - A system comprising an injector for injecting fuel directly into the exhaust system. A control module supplies fuel using the injector to burn particulate matter in the particulate filter when the control module determines that regeneration is needed. The control module selectively supplies fuel to exercise the injector during periods when the control module determines that regeneration is not needed. | 12-04-2008 |
20090235653 | PARTICULATE MATTER FILTER ASSEMBLY WITH A FLOW DEVICE - A particulate matter (PM) filter assembly includes a PM filter that filters PM from an exhaust stream and that includes an entry face facing a first direction of flow of the exhaust stream, and a swirl element disposed in the exhaust stream and that includes a blade that directs a portion of the exhaust stream in a second direction of flow that is different than the first direction of flow. The blade directs the portion of the exhaust stream to distribute the exhaust stream over a frontal area of the entry face of the PM filter. A related method of filtering particulate matter from an exhaust stream is also provided. | 09-24-2009 |
20100050616 | EXHAUST AFTERTREATMENT SYSTEM - An apparatus for treating an exhaust gas feedstream from an internal combustion engine operating lean of stoichiometry comprises a particulate filter device comprising a porous substrate element having a hydrocarbon-selective catalytically reactive washcoat. The hydrocarbon-selective catalytically reactive washcoat comprises a silver-oxide catalytic material on an alumina-based washcoat. An injection device is operative to inject a hydrocarbon reductant upstream of the particulate filter device. | 03-04-2010 |
20100057328 | LEAN NITROGEN OXIDE EMISSION CONTROL SYSTEM AND METHOD - A control system comprising an NH | 03-04-2010 |
20100098612 | METHOD AND ARCHITECTURE FOR REDUCING NOX AND PARTICULATE MATTER EMISSIONS IN EXHAUST GAS FROM HYDROCARBON FUEL SOURCE WITH A FUEL LEAN COMBUSTION MIXTURE - An exemplary method and associated architecture for reducing NO | 04-22-2010 |
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 |
20100115930 | EXHAUST AFTER TREATMENT SYSTEM - A selective catalytic reduction system for reducing oxides of nitrogen in the exhaust gas flow of an internal combustion engine is disclosed. The system has a ceramic monolith disposed within said exhaust gas flow and includes exhaust flow passages extending therethrough. A high temperature selective catalytic reduction catalyst composition is applied to an inlet portion of the exhaust flow passages and a low temperature selective catalytic reduction catalyst composition applied to an outlet portion of the exhaust flow passages. The high and the low temperature catalytic reduction catalysts are operable to reduce oxides of nitrogen at high load and low load operation of the internal combustion engine. | 05-13-2010 |
20100191437 | METHOD AND SYSTEM FOR MONITORING AN ACTIVE HYDROCARBON ADSORBER - A method and system for monitoring an exhaust gas adsorber includes a comparison module comparing the first exhaust gas constituent signal corresponding to an amount of exhaust gas constituent in an exhaust conduit and a second exhaust gas constituent signal corresponding to an amount of exhaust gas constituent in the exhaust gas adsorber. The system includes a fault module generating a fault in response to comparing in the comparison module. | 07-29-2010 |
20100221154 | METHOD AND APPARATUS FOR REDUCING NOX EMISSIONS FROM A LEAN BURNING HYDROCARBON FUELED POWER SOURCE - One embodiment includes an oxidation catalyst assembly formed by applying a washcoat of platinum and a NO | 09-02-2010 |
20100300078 | Exhaust After Treatment System - In an exemplary embodiment of the present invention, an exhaust treatment system for reducing constituents in the exhaust gas of an internal combustion engine is provided. A ceramic monolith is disposed within the exhaust treatment system and has exhaust flow passages extending therethrough that are defined by longitudinally extending walls therebetween. A first catalyst composition for catalytic reduction of oxides of nitrogen in the exhaust gas is applied to a first portion of the exhaust flow passages. A second catalyst composition for catalytic oxidation of hydrocarbons and oxides of nitrogen in the exhaust gas is applied serially downstream to a second, portion of the exhaust flow passages. The second catalytic composition is configured to reduce ammonia and hydrocarbon slip past the first catalytic composition. | 12-02-2010 |
20100319320 | EXHAUST GAS TREATMENT SYSTEM INCLUDING A LEAN NOX TRAP AND TWO-WAY CATALYST AND METHOD OF USING THE SAME - An exhaust gas treatment system for a diesel engine is disclosed. The exhaust gas treatment system includes a lean NO | 12-23-2010 |
20100319342 | EXHAUST TREATMENT SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - A reductant delivery system for an exhaust treatment system of an internal combustion engine is disclosed. The system includes a turbocharger fluidly coupled to, and configured to receive exhaust gas from, the internal combustion engine. An exhaust gas driven turbine wheel is disposed for rotation in a turbine housing of the turbocharger. A reductant injection device is fluid communication with the exhaust gas driven turbine wheel, a reductant tank having a reductant stored therein and a conduit system fluidly connecting the reductant tank with the reductant injection device. Reductant is delivered to the reductant injection device for delivery of the reductant to the exhaust gas driven turbine wheel. | 12-23-2010 |
20110011067 | Ash Filter, Exhaust Gas Treatment System Incorporating the Same and Method of Using the Same - An ash filter for a reciprocating piston internal combustion engine is disclosed. The ash filter includes a substrate, such as a honeycomb monolith substrate or a plurality of particulate substrates, and a matrix of a zeolite material disposed on the respective substrate or substrates, the matrix of the zeolite material configured to remove ash from an exhaust gas flow from a reciprocating piston internal combustion engine. An exhaust treatment system for a reciprocating piston internal combustion engine is disclosed. The exhaust treatment system includes an ash filter comprising a matrix of a first zeolite and configured to receive an exhaust gas flow from an engine; and an exhaust treatment device, the exhaust treatment device comprising a matrix of a second zeolite and configured to receive the exhaust gas flow from the ash filter. | 01-20-2011 |
20110011068 | Exhaust Gas Treatment System - An emission treatment system for a vehicle having an internal combustion engine is disclosed. The emission treatment system has an HC-SCR catalyst including a non-Pt group metal dispersed in a ceramic matrix configured to receive an exhaust gas flow from an engine. The system also has an oxidation catalyst comprising a Pt group metal configured to receive the exhaust gas flow from the HC-SCR catalyst. The system also has a U-SCR catalyst and a diesel particulate filter, one of the U-SCR catalyst or the DPF configured to receive the exhaust gas flow from the oxidation catalyst and the other one of the U-SCR catalyst or the diesel particulate filter configured to receive the exhaust gas flow from the respective one. | 01-20-2011 |
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 |
20110082031 | METHOD AND SYSTEM FOR MONITORING A HYDROCARBON ADSORBER - A catalyst and method of forming the catalyst includes a catalyst body having hydrocarbon adsorber material and oxygen storage capacity material disposed thereon. | 04-07-2011 |
20110214650 | ENGINE-OUT NOX VIRTUAL SENSOR FOR AN INTERNAL COMBUSTION ENGINE - A method for controlling an internal combustion engine includes monitoring engine operation including a parameter descriptive of NOx generation within the engine, determining a fast transient NOx estimate with a dynamic model based upon the monitored engine operation, and during a fast transient engine operation including an increase in an operating state of the engine and a substantial closing of an exhaust gas recirculation valve, controlling an engine system based upon the fast transient NOx estimate. | 09-08-2011 |
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 |
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 |
20120191288 | ON-BOARD DIAGNOSTICS SYSTEM AND METHOD - An on-board diagnostics system and method are disclosed for a vehicle having an engine and an exhaust system. The system includes a modified selective catalytic reduction catalyst coupled to the engine via the exhaust system, where the modified selective catalytic reduction catalyst includes oxygen storage components. An upstream oxygen sensor is disposed in the exhaust pipe upstream of the modified selective catalytic reduction catalyst and a downstream oxygen sensor is disposed in the exhaust pipe downstream from the modified selective catalytic reduction catalyst. An engine control module receives data from the upstream and downstream oxygen sensors and determines a lifespan of the modified selective catalytic reduction catalyst based upon the data from the upstream and downstream oxygen sensors. | 07-26-2012 |
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 |
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 |
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 |
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 |