Matches 1 - 50 out of 122 1 2 3 >


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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...
US20150000389 Exhaust Aftertreatment Sensor Assembly  
An exhaust aftertreatment system includes an exhaust aftertreatment component housing and a sensor table coupled to an exterior surface of the exhaust aftertreatment component housing. The sensor...
US20130104638 NOx SENSOR DIAGNOSIS DEVICE AND SELECTIVE CATALYTIC REDUCTION SYSTEM  
A NOx sensor diagnosis device which can diagnose validity of a NOx sensor by considering an environmental condition and can prevent erroneous diagnosis, and a selective catalytic reduction system...
US20130298655 SERVICE TEST FOR EXHAUST GAS TREATMENT SYSTEM  
A service procedure to test the SCR device involves turning on an upstream and downstream SCR NOx sensor, turning off an NH3 injector, running the engine until enough upstream NOx mass has been...
US20140338434 ADAPTIVE SOOT MASS ESTIMATION IN A VEHICLE EXHAUST AFTER-TREATMENT DEVICE  
A method of estimating a total amount of soot in a diesel particulate filter includes monitoring a pressure differential across the diesel particulate filter; monitoring an engine speed and an...
US20120204629 EXHAUST CATALYST TEMPERATURE ESTIMATING APPARATUS AND EXHAUST CATALYST TEMPERATURE ESTIMATION METHOD FOR INTERNAL COMBUSTION ENGINE  
A exhaust catalyst temperature estimating apparatus is provided for estimating a exhaust catalyst temperature of a exhaust catalyst in which a catalyst is loaded on a support and arranged in an...
US20130055803 COMPETENCE DIAGNOSIS SYSTEM FOR UREA WATER TEMPERATURE SENSOR  
A competence diagnosis system for a urea water temperature sensor that can prevent a misdiagnosis when urea water is replenished in a urea tank. The system includes a urea water level condition...
US20120053816 METHOD FOR DETERMINING THE OXYGEN STORAGE CAPACITY OF A CATALYTIC CONVERTER AND METHOD FOR DETERMINING A TIME DELAY INHERENT IN A LAMBDA PROBE  
In an arrangement, wherein a post-catalytic converter lambda probe is arranged downstream of a catalytic converter having an oxygen store, and wherein both the oxygen store and the post-catalytic...
US20150075270 REDUCTANT DELIVERY PERFORMANCE DIAGNOSTICS SYSTEM  
A method for diagnosing reductant delivery performance of a reductant delivery system is provided. The method provides an outlet pressure sensor at a reductant outlet of the reductant delivery...
US20140020461 CATALYST DETERIORATION DIAGNOSTIC DEVICE AND DIAGNOSTIC METHOD  
A device for diagnosing deterioration of a catalyst by a decrease in oxygen storage capacity, in which the oxygen storage capacity by which the catalyst deterioration is diagnosed to be present...
US20120131992 CATALYST DETERIORATION DIAGNOSTIC DEVICE AND DIAGNOSTIC METHOD  
A device for diagnosing deterioration of a catalyst by a decrease in oxygen storage capacity, in which the oxygen storage capacity by which the catalyst deterioration is diagnosed to be present...
US20110258992 Ammonia Slip Catalyst Diagnostic Methods and Systems  
A method of diagnosing an ammonia slip catalyst device is provided. The method includes: computing a delta between a first temperature and a second temperature; evaluating the delta based on an...
US20110056279 Method for Checking a Catalytic Converter Oxygen Storage Reservoir for Sufficient Storage Capacity  
Four cases are to be distinguished from one another for an exhaust gas line of a motor vehicle with an oxygen storage reservoir and a lambda probe located downstream from at least part of the...
US20140150541 ON-BOARD DIAGNOSTICS SYSTEM  
An on-board diagnostics system for an exhaust system of an internal combustion engine is disclosed. The system comprises one or more ferromagnetic materials and a means for measuring magnetic...
US20120067114 DETECTION OF AFTERTREATMENT CATALYST DEGRADATION  
An exemplary embodiment is a system, including an internal combustion engine fluidly coupled to an exhaust gas flowpath, an aftertreatment system disposed in the exhaust gas flowpath, where the...
US20120031178 METHOD FOR DETERMINING THE OXYGEN STORAGE CAPACITY OF A CATALYTIC CONVERTER  
An offset in the signal of a pre-catalytic converter lambda probe of an exhaust gas system of an internal combustion engine affects a measured oxygen intake storage capacity and a measured oxygen...
US20080163608 DEVICE FOR ESTIMATING THE LOAD STATE OF A NOX STORAGE CATALYTIC CONVERTER  
A device for estimating the loading state of a NOx storage catalytic converter. The device includes a module for determining the oxygen concentration difference between an oxygen concentration...
US20130036808 CATALYST ANOMALY DIAGNOSTIC SYSTEM  
Active air-fuel ratio control is performed to alternately control an air-fuel ratio in an area located upstream of a catalyst between a lean side and a rich side. Switching is carried out between...
US20130228008 DEVICE AND METHOD OF DETERMINING DETERIORATION OF CATALYST  
A catalyst determining device includes an oxidation catalyst disposed in an outlet passage in an engine, the oxidation catalyst including an adsorption substance for adsorbing and desorbing an...
US20120280819 EFFICIENCY DETERMINATION FOR A SELECTIVE-CATALYTIC-REDUCTION CATALYST  
A method of assessing overall efficiency of a selective-catalytic-reduction catalyst includes monitoring instantaneous efficiency of the catalyst. The method also includes determining the overall...
US20130180322 CATALYST ABNORMALITY DIAGNOSIS APPARATUS  
Active air-fuel ratio control is performed to alternately control an air-fuel ratio in an area located upstream of a catalyst between a lean side and a rich side. The amount of oxygen absorbed and...
US20110107827 Method for Testing the Functionality of an Oxidation Catalyst of an Internal Combustion Engine  
A method of testing the functionality of an oxidation catalytic converter of an internal combustion engine, particularly a diesel engine, of a motor vehicle, includes the following steps: (a)...
US20090235726 METHOD FOR DETERMINING THE OXYGEN STORAGE CAPACITY OF A CATALYTIC CONVERTER FOR A MOTOR VEHICLE AS WELL AS AN ASSOCIATED MEASURING DEVICE  
Method for determining the oxygen storage capacity of a catalytic converter for a motor vehicle using the signals of an oxygen probe upstream and an oxygen probe downstream from the catalytic...
US20150139860 ON-BOARD CATALYST HEALTH MONITORING AND CONTROL SYSTEM ADAPTATION IN INTERNAL COMBUSTION ENGINES  
Various embodiments include systems adapted to monitor catalyst deterioration. Some embodiments include a catalyst deterioration detection system including a pre-catalytic converter gas sensor, a...
US20150090020 METHOD AND SYSTEM FOR DIAGNOSING DETERIORATION OF EXHAUST EMISSION CONTROL CATALYST  
A deterioration diagnosing system for an exhaust emission control catalyst of an engine is provided. The catalyst includes an HC adsorbing part and an oxidation catalyst part. The system includes...
US20130014575 EXHAUST DIAGNOSTIC SYSTEM AND METHOD WITH SCR NH3 DEPLETION CLEANSING MODE FOR INITIAL STEP IN THE DEF QUALITY SERVICE HEALING TEST  
An exhaust diagnostic system comprises a selective catalyst reduction (SCR) component testing module, an exhaust stream temperature management module, and a test enabling module. The component...
US20140144220 DIAGNOSTIC OPERATION STRATEGY FOR 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...
US20150068295 OXIDATION CATALYST/HYDROCARBON INJECTOR TESTING SYSTEM  
An oxidation catalyst (OC)/hydrocarbon injector (HCI) testing system includes a controller having a first oxygen sensor input configured and disposed to receive a first oxygen sensor value...
US20150247441 METHOD AND SYSTEM FOR DIAGNOSING DETERIORATION OF EXHAUST EMISSION CONTROL CATALYST  
A method of diagnosing deterioration of an exhaust emission control catalyst is provided. The catalyst includes an HC (hydrocarbon) adsorbing part and an oxidation catalyst part. The method...
US20080034854 Torque Converter Non-Destructive Inspection and Verification for Remanufacturing  
A torque converter may be inspected and verified using non-destructive testing methods so that the torque converter may be reused in a remanufacturing operation. The methods will permit a torque...
US20140208838 MICRO ELECTRO MECHANICAL SYSTEM CATALYTIC COMBUSTIBLE GAS SENSOR USING POROUS MEMBRANE EMBEDDED MICRO-HEATER  
Provided is a catalytic combustible gas sensor using a porous membrane embedded micro-heater and a micro electro mechanical system (MEMS) technology. The present disclosure provides a gas sensor...
US20140147339 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...
US20140245822 METHOD AND DEVICE FOR MONITORING A NITROGEN OXIDE STORAGE CATALYTIC CONVERTER  
A method for monitoring a nitrogen oxide storage catalytic converter (NSC) in the exhaust gas duct of an internal combustion engine which is operated at least temporarily in a lean fashion,...
US20110000290 ABNORMALITY DIAGNOSIS APPARATUS AND ABNORMALITY DIAGNOSIS METHOD FOR NOx SENSOR  
An exhaust passage (15) of an internal-combustion engine (10) includes a selective reduction NOx catalyst (34) and an after-catalyst NOx sensor (50) for detecting a NOx concentration Cr at the...
US20140250993 CATALYST-DEGRADATION DETECTION DEVICE  
An oxygen amount (an oxygen storage amount OSA) stored by metal cerium during a storage cycle is obtained based on an output value of an A/F sensor in a time period immediately before an exhaust...
US20110153260 METHOD FOR DIAGNOSING A CATALYTIC DEVICE OF AN ENGINE EXHAUST GAS AFTER-TREATMENT SYSTEM  
A method is provided for estimating an aging index of the catalytic device. There estimation of the aging index includes, but is not limited to determining the catalytic device operating...
US20100326052 METHOD FOR MONITORING AMMONIA STORAGE IN AN EXHAUST AFTERTREATMENT SYSTEM  
A method for monitoring the ammonia-selective catalyst reduction device includes monitoring states of parameters of the exhaust gas feedstream upstream of the ammonia-selective catalyst reduction...
US20110296905 METHOD FOR MONITORING AN SCR CATALYTIC CONVERTER  
A method is provided for monitoring an SCR catalytic converter (12), in which method the NH3 storage capacity of the SCR catalytic converter (12) is monitored. The SCR catalytic converter (12) is...
US20150013315 DELIVERY UNIT FOR A LIQUID ADDITIVE WITH A TEMPERATURE SENSOR, METHOD FOR CHECKING THE OPERATING STATE OF A DELIVERY UNIT AND MOTOR VEHICLE HAVING A DELIVERY UNIT  
A delivery unit for delivering a liquid additive in a motor vehicle, includes at least one temperature sensor for contactlessly measuring a temperature at least at one measurement point in the...
US20080229730 NOx TRAPPING CATALYTIC CONVERTER DIAGNOSTIC APPARATUS  
A NOx trapping catalytic converter diagnostic apparatus basically has a particulate matter accumulation estimating component, a particulate matter accumulation detecting component and a...
US20130098146 CATALYST DETERIORATION DETECTION APPARATUS AND CATALYST DETERIORATION DETECTION METHOD FOR INTERNAL COMBUSTION ENGINE  
Provision is made for a catalyst that is arranged in an exhaust passage of an internal combustion engine and has an oxidation function, downstream side temperature detection means that detects the...
US20140283589 INTEGRATED FUEL CATALYST MONITOR  
A method of monitoring catalyst performance may comprise applying a set of parameter readings for a given sample to a support vector machine to generate a classification output, clustering the set...
US20100089037 OPTIMIZED DISCRETE LEVEL SENSING SYSTEM FOR VEHICLE REDUCTANT RESERVOIR  
An example emissions-control system of a vehicle includes a reservoir configured to contain a reductant solution, and an SCR device disposed in the exhaust system and configured to consume the...
US20140338435 HOLDING JIG AND PRESSURE LOSS MEASURING DEVICE  
A holding jig has a tubular jig base member, and a tubular expansion/contraction member disposed on an inner peripheral surface side of the tubular jig base member. Both end sides of the tubular...
US20140290348 ABNORMALITY DETECTING DEVICE OF INTERNAL COMBUSTION ENGINE  
An abnormality detecting device of an internal combustion engine according to the present invention includes a sensor nick abnormality detecting unit configured to detect a nick abnormality in a...
US20140000354 SYSTEM FOR SENSING SOOT OF DIESEL VEHICLE  
A system for sensing soot of a diesel engine includes a combustion element which is a porous ceramic structure and to which a catalytic substance that is combustion-reacted with the soot is fixed,...
US20140260216 Apparatus, Method, and System for Diagnosing Reductant Delivery Performance  
An exhaust gas treatment system for an internal combustion engine may have a reductant delivery system with a controller that performs period diagnostics to determine whether there is a blockage...
US20150152769 CATALYST DETERIORATION DETERMINATION SYSTEM  
A catalyst deterioration determination system for determining deterioration of an exhaust gas purification catalyst having a capability of storing oxygen determines deterioration of the exhaust...
US20100212416 ABNORMALITY DETERMINATION APPARATUS AND METHOD FOR OXYGEN SENSOR  
An abnormality determination apparatus for an oxygen sensor provided on the downstream side of a catalyst includes: a first determination portion that determines whether amount of decline in...
US20100212414 ABNORMALITY DETERMINATION APPARATUS AND METHOD FOR OXYGEN SENSOR  
An abnormality determination apparatus for an oxygen sensor provided on the downstream side of a catalyst includes: a first determination portion that determines whether a rich-output continuation...

Matches 1 - 50 out of 122 1 2 3 >