Matches 1 - 50 out of 295 1 2 3 4 5 6 >


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US20130031893 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...
US20100319318 DEGRADATION DIAGNOSIS DEVICE FOR CATALYST  
A temperature increasing degree of the catalytic outflow exhaust temperature at the time the exhaust air-fuel ratio is changed to the rich side is found in respect to each of a plurality of the...
US20130061574 SCR THAWING CONTROL SYSTEM  
A selective catalytic reduction thawing control system that can distinguish between a thawing failure and a malfunction and can prevent a malfunction of a supply module (“SM”) pump. The thawing...
US20120067031 METHOD AND APPARATUS FOR MONITORING A REDUCTANT INJECTION SYSTEM IN AN EXHAUST AFTERTREATMENT SYSTEM  
A reductant injector is configured to dispense a reductant into an exhaust gas feedstream of an internal combustion engine upstream of a selective catalytic reduction device. The reductant...
US20140060012 DETERIORATION DIAGNOSIS DEVICE FOR OXIDATION CATALYST  
A deterioration diagnosis device for an oxidation catalyst includes: a multi-gas sensor disposed in an exhaust passage downstream of an oxidation catalyst, the multi-gas sensor including a NO2...
US20120073268 FUEL-FIRED BURNER FOR NO2 BASED REGENERATION  
A fuel-fired burner in a vehicle exhaust system is selectively activated to increase exhaust gas temperature to a desired reference temperature. The fuel-fired burner can be either a partial range...
US20100319316 OXIDATION CATALYST FAULT DIAGNOSIS UNIT AND OXIDATION CATALYST FAULT DIAGNOSIS METHOD AND INTERNAL COMBUSTION ENGINE EXHAUST PURIFICATION APPARATUS  
To provide an oxidation catalyst fault diagnosis unit and fault diagnosis method that can perform fault diagnosis of an oxidation catalyst with good precision in a desired time period and an...
US20110083424 METHOD AND APPARATUS FOR MONITORING A REDUCTANT INJECTION SYSTEM IN AN EXHAUST AFTERTREATMENT SYSTEM  
An internal combustion engine operating at a lean air/fuel ratio includes a reductant injection system configured to dispense reductant into an exhaust gas feedstream upstream of a selective...
US20120023912 CONTAMINATION DETECTION IN FUEL SYSTEM  
A system comprises a fuel system for delivering fuel to an engine for combustion and a reductant storage system for delivering reductant to the exhaust stream for an SCR catalyst for NOx...
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...
US20150113960 LEAK DETECTION AND MITIGATION IN REDUCTANT DELIVERY SYSTEMS  
Solid storage media stores a reductant in a reductant source that is released from the solid storage media in a gaseous form into an exhaust system. A leak detection and/or leak mitigation system,...
US20110252769 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...
US20120000187 PARTICULATE FILTER REGENERATION INTERRUPTION SYSTEMS AND METHODS  
A regeneration control system for a vehicle includes a regeneration control module and a regeneration interrupt module. The regeneration control module selectively provides fuel to an oxidation...
US20080271435 Deterioration Diagnosis System for an Air-Fuel Ratio Sensor  
A deterioration diagnosis system for an air fuel sensor mounted to an exhaust pipe of an internal combustion engine. The air fuel sensor determines a mixture ratio of air and fuel fed into the...
US20150128568 METHOD FOR DETERMINING IF AN INJECTOR IS IN A BLOCKED STATE  
A method for determining if an injector (10) is in a blocked state, the injector including a coil of resistance R and of inductance L, passed through by a power supply current of maximum intensity...
US20120311995 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...
US20060090455 Abnormality diagnosis apparatus for secondary air supply system of engine  
An abnormality diagnosis apparatus is used for a secondary air supply system for an internal combustion engine. The system includes an air pump for supplying secondary air into an upstream of a...
US20120204537 Adaptive diesel particulate filter regeneration control and method  
An after-treatment device that includes a diesel particulate filter (DPF) requiring periodic regeneration includes a sensor providing a signal indicative of a soot accumulation and at least one...
US20120210700 METHOD TO MONITOR PRESSURE DROP ACROSS A SELECTIVE CATALYST REDUCER FOR ENGINE AND EXHAUST AIRFLOW DIAGNOSTICS  
A method to diagnose exhaust system malfunction in an electronically controlled internal combustion engine having an exhaust system and including a Selective Catalyst Reducer (SCR) is disclosed....
US20110314792 ABNORMALITY DIAGNOSIS SYSTEM AND METHOD FOR DIAGNOSING ABNORMALITY IN FILTER REGENERATION SYSTEM  
The invention intends to provide a technology which makes it possible to diagnose with higher accuracy whether or not abnormality occurs in a filter regeneration system causing excessive execution...
US20060272315 Fuel control for robust detection of catalytic converter oxygen storage capacity  
An oxygen storage capacity (OSC) monitoring system for a vehicle having a catalytic converter includes an inlet oxygen sensor that generates an inlet sensor signal (ISS) based on an oxygen content...
US20150052878 Multi-stage SCR System  
A multi-stage SCR system including a front reductant injecting device, a front mixer, a front SCR catalyst, a back reductant injecting device, a back mixer, a back SCR catalyst, and a DCU. The...
US20110131955 Deterioration Rate Determination Method of Lambda Sensor and System Thereof  
A degradation rate decision method of a lambda sensor, may include an injection step injecting a reducing agent so as to regenerate a nitrogen oxide purification catalyst, a lambda value detection...
US20120285145 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 (7)...
US20130067893 METHOD AND DEVICE FOR DIAGNOSING AN ERROR IN AN EXHAUST GAS RECIRCULATION SYSTEM  
In a method for determining a faulty exhaust gas recirculation line in an exhaust gas recirculation system of an internal combustion engine having multiple exhaust gas recirculation lines, a...
US20140373511 METHOD AND ALGORITHM FOR PERFORMING AN NH3 SENSOR RATIONALITY DIAGNOSTIC  
An example method includes interpreting an NH3 composition value at a position upstream of a selective reduction catalyst (SCR) element fluidly disposed in the exhaust conduit of an engine,...
US20120311994 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...
US20140223886 SYSTEMS AND METHODS FOR AFTERTREATMENT SYSTEM DIAGNOSTICS  
Methods and systems for diagnosing inadequate performance and/or degradation of one or more components of an aftertreatment system are disclosed, the components including at least an oxidation...
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...
US20110023456 METHOD AND SYSTEM FOR VERIFYING THE OPERATION OF AN SCR CATALYST  
A method and control system for a selective catalytic reduction (SCR) catalytic converter and an ammonia dosing module that stores ammonia in a selective catalyst reducing (SCR) catalyst and that...
US20130291516 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...
US20120006008 OPTIMIZATION OF ACTIVE REGENERATION TRIGGERS BASED ON AMBIENT AND VEHICLE OPERATING CONDITIONS  
A method of controlling the regeneration of a particulate filter includes defining a regeneration trigger limit for at least one operating parameter of the vehicle, modifying the regeneration...
US20140165537 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...
US20110146235 ABNORMALITY DETECTION SYSTEM AND ABNORMALITY DETECTION METHOD FOR INTERNAL COMBUSTION ENGINE  
When the NOx SCR catalyst (15) deteriorates, the NOx removal efficiency increases with an increase in the catalyst temperature as indicated by the curves B1 and B2. When there is an irregularity...
US20130227935 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,...
US20100319319 DPF ACCUMULATION AMOUNT ESTIMATING APPARATUS  
A DPF accumulation amount estimating apparatus uses an integrated PM accumulation amount estimation logic which combines the difference between an engine PM emission amount and a PM regeneration...
US20090173059 SULPHUR OXIDE (SOX) REMOVAL METHOD AND SYSTEM AND STOP MODULE FOR SAID SYSTEM  
The invention relates to a system for the removal of SOx (sulphur oxide) stored in a nitrogen oxide (NOx) trap associated with an oxidation catalyst and disposed in an exhaust line of an engine,...
US20130327019 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...
US20100083636 SYSTEM AND METHODS TO DETECT NON-UREA REDUCTANT FILLED IN A UREA TANK  
A method for indicating a non-urea reductant fault in a powertrain including an internal combustion engine and an aftertreatment system having an aftertreatment device utilizing a catalyst to...
US20130139490 SYSTEM AND METHOD FOR DETERMINING AN EXHAUST SYSTEM CONDITION  
In one embodiment of the invention, a method for determining an exhaust system condition includes determining if a reaction in an oxidation catalyst is performing acceptably based on a determined...
US20140245719 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...
US20080178576 GPS-ACTIVATED EXHAUST FILTRATION MONITORING AND CONTROL SYSTEM  
A system for removing particulates from the exhaust gas of a vehicle internal combustion engine, particularly during those times that the emission of such particulates into the atmosphere would be...
US20110120091 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...
US20120117945 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,...
US20090133385 EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE, AND CONTROL METHOD THEREOF  
An exhaust purification device includes a particulate filter (10), an air flow meter (7) that detects the amount of fresh air flowing in an intake passageway (3), and an EGR device (30) that...
US20150007553 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...
US20130239553 SYSTEM FOR DETERMINING SULFUR STORAGE OF AFTERTREATMENT DEVICES  
An exhaust gas treatment system for an internal combustion engine for determining a total amount of sulfur that is stored on at least one aftertreatment device is provided. The exhaust gas...
US20120317959 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...
US20130318948 SOOT SENSOR FUNCTIONAL CAPABILITY MONITORING  
A method of monitoring functional capability of a soot sensor that is responsive to deposition of soot from an exhaust gas stream on a sensor surface comprises acquiring a measurement signal of...

Matches 1 - 50 out of 295 1 2 3 4 5 6 >