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US20110072788 GASOLINE PARTICULATE FILTER REGENERATION AND DIAGNOSTICS  
A method for operating a spark-ignition engine having a three-way catalyst and a particulate filter downstream thereof, comprising: oscillating an exhaust air-fuel ratio entering the particulate...
US20110214414 ELECTRICALLY HEATED PARTICULATE FILTER ENHANCED IGNITION STRATEGY  
An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream...
US20110061363 EXHAUST DIAGNOSTIC SYSTEMS AND METHODS FOR RESETTING AFTER OPERATION WITH POOR REDUCTANT QUALITY  
An exhaust diagnostic system includes a selective catalyst reduction (SCR) efficiency testing module that determines an efficiency of a SCR catalyst. An exhaust gas temperature management module...
US20120067027 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...
US20120247085 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...
US20110100013 PUMPING LOSS REDUCTION SYSTEMS AND METHODS  
An engine control system comprises a base air per cylinder (APC) module, a catalyst temperature adjustment module, an ambient temperature adjustment module, and an APC adjustment module. The base...
US20110167797 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...
US20070068146 Exhaust treatment system having hydraulically-actuated air valve  
An exhaust treatment system for a power source is disclosed. The exhaust treatment system has an inlet configured to receive an exhaust flow from the power source, a filtering medium configured to...
US20110146233 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...
US20120060473 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...
US20140165557 EMISSIONS REDUCTIONS THROUGH REGENT 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,...
US20080115486 FLEXIBLE FUEL TOLERANT CATALYTIC CONVERTER DIAGNOSTIC METHOD  
A monitoring system for a catalytic converter is provided. The system includes: a fuel determination module that determines a fuel composition based on a sensed composition of fuel in a fuel...
US20120073269 SYSTEM AND METHOD FOR TREATING PARTICULATE MATTER VENTED FROM AN ENGINE CRANKCASE  
System and methods for treating particulate matter vented from an engine crankcase are provided. In one embodiment, an engine includes a crankcase. A ventilation hose is coupled to the engine to...
US20110083639 CYLINDER DEACTIVATION TO REDUCE FUEL ENRICHMENT AFTER FUEL CUTOFF MODES  
A system includes a fuel cutoff module and a cylinder deactivation module. The fuel cutoff module generates a fuel cutoff signal when a deceleration fuel cutoff condition occurs, wherein fueling...
US20110126520 Regeneration Method for Diesel Particulate Filter  
A regeneration control method of a particulate filter, may include regenerating the particulate filter, determining whether an engine is in an idle condition or in an over-run condition, and...
US20110023459 NOx SENSOR COMPENSATION  
Various systems and methods are described for controlling an engine in a vehicle during engine operation, the engine having an exhaust and a NOx sensor coupled in the engine exhaust. One example...
US20110083422 SYSTEMS AND METHODS FOR CONTROLLING REGENERATION OF NITROGEN OXIDE ADSORBERS  
An exhaust treatment system includes a nitrogen oxide (NOx) monitoring module and a regeneration control module. The NOx monitoring module monitors first and second NOx levels in an exhaust stream...
US20110265455 AMMONIA BURNING INTERNAL COMBUSTION ENGINE  
An ammonia burning internal combustion engine capable of using ammonia as fuel comprises an exhaust purifying catalyst purifying ammonia and NOx in an inflowing exhaust gas and an inflowing gas...
US20140144125 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...
US20100275580 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...
US20110173958 DIESEL ENGINE  
An object is to provide a diesel engine (2) that eliminates discomfort when an operator of a working machine coupled to the diesel engine (2) is at work while a particulate filter (10) is being...
US20150204260 PURIFICATION APPARATUS OF ENGINE EXHAUST GAS AND METHOD FOR PURIFICATION OF EXHAUST GAS  
The first target A/F directing toward a richer side from the initial target A/F to the theoretical A/F is calculated; and the first estimated catalyst's oxygen amount is calculated based on the...
US20110265457 EXHAUST PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE  
There is provided an exhaust purifying device for an internal combustion engine in which NOx can be purified in selective catalytic reduction and occurrence of an ammonia slip can be restricted....
US20150121852 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...
US20140090360 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...
US20120079815 DIESEL ENGINE  
A diesel engine is configured to be optionally set either to a low fuel consumption mode in which the amount of fuel consumption is reduced or to a low noise mode in which the noise is reduced so...
US20110061370 EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE  
In an internal combustion engine, an NOX selective reduction catalyst (15) is arranged in an engine exhaust passage, an aqueous urea solution is fed to the NOX selective reduction catalyst (15)...
US20110047978 METHOD FOR EVALUATING DEGRADATION OF 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...
US20110131954 DIESEL PARTICULATE FILTER CONTROL  
Methods and systems are provided for managing particulate emissions in an engine including a particulate filter and a CO2 sensor downstream of the filter. A CO2 sensor may be used to infer the...
US20090171553 SYSTEM FOR DETERMINING THE LEVEL OF SULPHUR POISONING OF DEPOLLUTION MEANS INTEGRATED INTO THE EXHAUST LINE OF A MOTOR VEHICLE ENGINE  
The invention relates to a system for determining the level of sulphur poisoning of depollution means integrated into the exhaust line of a motor vehicle engine, said system being associated with...
US20110036069 METHOD FOR OPERATING A LAMBDA SENSOR DURING THE HEATING PHASE  
In a method for operating a lambda sensor disposed in an exhaust gas system of an internal combustion engine,—the heating element is subjected to a predefined heating power substantially with the...
US20120096835 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...
US20130152549 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...
US20050247050 Adsorption based ammonia storage and regeneration system  
One aspect of the invention relates to a device for storing ammonia for use in SCR on board a vehicle. The device comprises an adsorption bed with a high capacity for storing ammonia. The device...
US20080141659 Emissions conformance for an exhaust after-treatment system having a dosing agent supply  
An exhaust after-treatment system for a vehicle including a dosing agent that is selectively injected into an exhaust from a dosing agent supply includes a first module that determines a level of...
US20120023913 CATALYST ABNORMALITY DIAGNOSIS APPARATUS  
The air-fuel ratio of exhaust gas supplied to a catalyst is alternately and actively switched between a rich state value and a lean state value. In conjunction with the performance of this active...
US20110073070 METHOD FOR CONTROLLING SPARK FOR PARTICULATE FILTER REGENERATING  
A system for filtering and oxidizing particulate matter produced by a gasoline direct injection engine is disclosed. In one embodiment, engine spark is controlled such that soot held by a...
US20110146244 REGENERATION ASSIST DELAY PERIOD  
A power system comprising an engine that produces exhaust, a particulate filter that traps soot from the engine, and a controller that switches the power system from a first operation mode into a...
US20110173957 DIESEL FUEL ALTERNATIVE DETECTION AND CORRECTION SYSTEMS AND METHODS  
A fuel control system for a vehicle comprises a fuel control module, a heat release determination module, and a detection module. The fuel control module supplies fuel to a cylinder of a diesel...
US20130192202 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...
US20150128567 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...
US20070214775 Diagnostic apparatus for an exhaust gas purification system of an internal combustion engine, an exhaust gas purification system and a diagnostic method thereof  
An apparatus for an exhaust gas system includes a main exhaust passage, a main catalytic converter disposed in the main exhaust passage, a bypass exhaust passage, a bypass catalytic converter...
US20100300073 PASSIVE NOx AND PM AFTERTREATMENT FOR DIESEL ENGINE  
A method of reducing emissions by operating a diesel engine in a stoichiometric air-fuel ratio mode. To achieve an optimal stoichiometric mode, intake throttling, boost air intake control, fuel...
US20110073088 METHOD FOR CONTROLLING FUEL OF A SPARK IGNITED ENGINE WHILE 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...
US20150107229 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...
US20120167554 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...
US20110203260 EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE  
An exhaust purification system of an internal combustion engine arranging in an engine exhaust passage an NOx storing reducing catalyst storing NOx contained in exhaust gas when an air-fuel ratio...
US20070251216 Exhaust treatment system  
An exhaust treatment system is provided. The system may include a particulate trap configured to remove one or more types of particulate matter from an exhaust flow of an engine. The system may...
US20070283683 SYSTEM FOR MODIFYING EXHAUST GAS FLOW THROUGH AN AFTERTREATMENT DEVICE  
An exhaust gas aftertreatment device for an internal combustion engine producing the exhaust gas comprises an inlet configured to receive the exhaust gas, an outlet from which the exhaust gas...
US20090077948 EXHAUST EMISSION PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE  
An exhaust emission purification system for an internal combustion engine, which can appropriately recover the cleanup performance of a NOx purification device that is disposed on the downstream...