| Patents for F01N 11 - Monitoring or diagnostic devices for exhaust-gas treatment apparatus (7,022) |
|---|
| 02/25/1993 | DE4226379A1 Measurement value reproducer matching to scale range - has sensor connected to integrating display instruments via discriminator stages |
| 02/23/1993 | US5189266 Vehicular exhaust resonance suppression system and sensing means therefore |
| 02/18/1993 | WO1993003358A1 Catalyst monitoring using ego sensors |
| 02/18/1993 | WO1993003357A1 An exhaust gas oxygen sensor |
| 02/18/1993 | CA2114787A1 Catalyst monitoring using ego sensors |
| 02/18/1993 | CA2114786A1 Catalyst monitoring using ego sensors |
| 02/04/1993 | WO1993002280A1 Catalytic converter efficiency monitoring |
| 02/03/1993 | EP0525566A1 A method and apparatus for determining the clogging of a filter, in particular a filter for an exhaust system |
| 01/19/1993 | US5179833 System for detecting deterioration of a three-way catalyst of an internal combustion engine |
| 01/12/1993 | US5177959 Method and arrangement for monitoring the conversion rate of a catalyzer in the exhaust-gas system of an internal combustion engine |
| 01/07/1993 | EP0521641A1 Method and apparatus for detecting catalyst malfunctions |
| 01/07/1993 | EP0521050A1 Process and device for controlling an internal combustion engine in function of the actual temperature of a downstream catalyst |
| 01/07/1993 | DE4139325C1 Function monitoring soot filter in exhaust pipe of IC engine |
| 01/07/1993 | DE4120891A1 Combustion engine pumping fresh air into exhaust system - is checked for correct exhaust treatment function by direct or indirect measurement of pump power consumption |
| 01/05/1993 | US5177464 Catalyst monitoring using a hydrocarbon sensor |
| 01/05/1993 | US5177463 Method of and apparatus for monitoring operation of a catalytic converter |
| 01/05/1993 | US5175997 Method of determining catalytic converter efficiency on computer controlled vehicles |
| 12/08/1992 | US5170147 Alarm device for the protection of catalytic converters for the exhaust gases of endothermic motors and vehicle provided with such a device |
| 12/03/1992 | DE4117529A1 IC engine exhaust gas measurer - extracts gas at increased suction power at beginning of process for set time or varied according to measurement threshold |
| 11/24/1992 | US5165230 Apparatus for determining deterioration of three-way catalyst of internal combustion engine |
| 11/03/1992 | US5159810 Catalytic converter monitoring using downstream oxygen sensor |
| 10/27/1992 | US5158059 Method of detecting abnormality in an internal combustion engine |
| 10/27/1992 | US5157921 Method for measuring conversion efficiency of catalyst and detecting deterioration thereof with air/fuel ratio sensors |
| 10/27/1992 | US5157919 Catalytic converter efficiency monitoring |
| 10/22/1992 | DE4112480A1 Measuring ageing state of catalyser in IC engine exhaust system - measuring upstream and downstream lambda values with engine operated with rich then weak mixt. or vice=versa and then allowed to idle |
| 10/20/1992 | US5157340 Method and apparatus for detecting soot concentration in particulate trap |
| 10/13/1992 | US5154055 Apparatus for detecting purification factor of catalyst |
| 10/07/1992 | EP0507372A1 Method and apparatus for diagnosing an engine control system |
| 09/24/1992 | DE4207079A1 Testing exhaust gas catalyser of motor vehicle combustion engine for function and condition - by simultaneously checking gas composition and catalyser operation in specified engine mode controlled by measurement and control unit |
| 09/24/1992 | DE4108436A1 Engine catalytic equipment - has radial test passages in flange between exhaust outlet and unit inlet flanges |
| 09/17/1992 | DE4108694A1 Regeneration system for engine exhaust gas particle filter - detects fault in control sensors for regeneration cycle to initiate auxiliary regeneration |
| 09/03/1992 | DE4203235A1 Failure-diagnostic device for engine exhaust recirculation control - evaluates cumulative drop in inlet manifold pressure within limited time after closure of recirculating system |
| 08/25/1992 | US5140810 Method of detecting failure in a secondary air supply system for internal combustion engines |
| 08/18/1992 | US5138835 Diesel engine with an exhaust-gas filter |
| 08/13/1992 | DE4103747A1 Combustion engine control responsive to catalytic converter temp. |
| 08/12/1992 | EP0498598A1 Exhaust gas purification system for an internal combustion engine |
| 08/11/1992 | US5136842 Method for heating an exhaust gas catalytic converter |
| 08/04/1992 | US5134847 Double air-fuel ratio sensor system in internal combustion engine |
| 07/28/1992 | US5133184 Method and apparatus for monitoring the conversion ratio of a catalytic converter |
| 07/07/1992 | US5127225 Air-fuel ratio feedback control system having a single air-fuel ratio sensor downstream of a three-way catalyst converter |
| 07/01/1992 | EP0492165A2 Procedure and device for testing catalytic converters |
| 06/25/1992 | WO1992010653A1 Determination of the location of the reaction zone in a catalytic converter |
| 06/11/1992 | DE4038829A1 Ermittlung einer reaktionszone in einem katalysator Determination of a reaction zone in a catalyst |
| 06/09/1992 | US5119631 Apparatus and method for detecting abnormalities in a secondary air supplier |
| 06/09/1992 | US5119628 Catalyst degradation diagnosing apparatus for air fuel ratio control system |
| 06/02/1992 | USRE33942 Double air-fuel ratio sensor system in internal combustion engine |
| 05/19/1992 | US5113651 Air injection system diagnostic |
| 04/21/1992 | US5105651 Method of and apparatus for analyzing exhaust gases of motor vehicles |
| 04/07/1992 | US5102434 Collecting particles conveyed through honeycomb using a gas permeable screen, then visibly or automatically inspecting figures formed screen which represent defects in internal partition walls |
| 04/01/1992 | EP0478133A2 Method and apparatus for monitoring deterioration of internal combustion engine exhaust gas purifier |
| 03/31/1992 | US5099647 Combined engine air/fuel control and catalyst monitoring |
| 03/31/1992 | US5099646 Air-fuel ratio feedback control system having a single air-fuel ratio sensor downstream of a three-way catalyst converter |
| 03/24/1992 | US5097700 Apparatus for judging catalyst of catalytic converter in internal combustion engine |
| 03/18/1992 | EP0475718A2 Method of controlling air-fuel ratio of a gas engine |
| 03/18/1992 | EP0475177A2 Apparatus for detecting purification factor of catalyst in catalytic converter of internal combustion engine |
| 03/18/1992 | EP0474804A1 Process and device for monitoring the degree of poisoning of a catalytic converter in the exhaust system of an internal-combustion engine |
| 03/05/1992 | WO1992003643A1 Monitoring of the catalytic activity of a catalytic converter through which a catalysable fluid flows |
| 03/05/1992 | WO1992003642A1 Monitoring of the catalytic activity of a catalyst in the exhaust gas system of an internal combustion engine |
| 03/05/1992 | DE4027207A1 Ueberwachung der katalytischen aktivitaet eines katalysators im abgassystem einer brennkraftmaschine Monitoring the catalytic activity of a catalyst in the exhaust system of an internal combustion engine |
| 02/20/1992 | WO1992002807A1 Method and apparatus for detecting soot concentration in particulate trap |
| 02/18/1992 | US5088281 Method and apparatus for determining deterioration of three-way catalysts in double air-fuel ratio sensor system |
| 02/05/1992 | EP0469170A1 Method for heating an exhaust gas catalyst |
| 01/30/1992 | DE4122787A1 Catalytic converter monitoring schemes for an IC engine - using computed outlet temp. values useful for automobile engine management systems |
| 01/23/1992 | DE4022546A1 Sensor device for monitoring vehicle exhaust systems - uses two temp.-sensors, one of which is coated with catalyst to promote oxidn. of hydrocarbon(s) and carbon mon:oxide |
| 01/15/1992 | EP0466311A1 Method of on-board detection of automotive catalyst degradation |
| 01/09/1992 | WO1992000446A1 Process for protecting catalysts used for cleaning exhaust gases and heat tone sensor for implementing the process |
| 01/07/1992 | US5077970 Method of on-board detection of automotive catalyst degradation |
| 01/02/1992 | DE4020383A1 Verfahren zum schutz von katalysatoren fuer die abgasreinigung sowie waermetoenungssensor zur durchfuehrung des verfahrens Method for protection of the catalysts for emission control and waermetoenungssensor for performing the method |
| 01/02/1992 | DE4019572A1 Detection of endangered or damaged catalyst and misfiring of IC engine - by evaluating measurements subject to different catalytic effects |
| 12/12/1991 | CA2068053A1 Method of on-board detection of automotive catalyst degradation |
| 11/28/1991 | DE4113005A1 Internal combustion engine esp. diesel engine with exhaust gas filter - has filter by=pass line opened by piston and matches exhaust feedback rate to engine operating conditions |
| 10/29/1991 | US5060474 Exhaust emission control failure detection system for internal combustion engine |
| 10/29/1991 | US5060473 System for detecting deterioration of catalyst in catalytic converter |
| 10/03/1991 | WO1991014861A1 Process and device for monitoring the degree of poisoning of a catalytic converter in the exhaust system of an internal-combustion engine |
| 10/03/1991 | WO1991014856A1 Process and device for controlling an internal combustion engine in function of the actual temperature of a downstream catalyst |
| 10/03/1991 | WO1991014855A1 Process and device for monitoring the performance of a catalyst in an internal combustion engine |
| 09/11/1991 | EP0445962A2 Method of inspecting a honeycomb structural body for purifying exhaust gases and apparatus used in the method |
| 09/04/1991 | EP0444783A1 Exhaust gas catalyst monitoring |
| 08/21/1991 | EP0442648A2 Method of and apparatus for monitoring operation of a catalytic converter |
| 08/15/1991 | CA2036293A1 Method of and apparatus for monitoring operation of a catalytic converter |
| 08/14/1991 | CA2036149A1 Exhaust gas catalyst monitoring |
| 07/18/1991 | DE4100241A1 One temp. sensor in catalytic exhaust purifier - receives small untreated gas stream for comparison with other sensor to indicate purifier effectiveness |
| 06/26/1991 | EP0433735A1 Alarm device for the protection of catalytic converters for the exhaust gases of endothermic motors |
| 05/28/1991 | US5018348 Method for detecting the condition of catalytic converters |
| 01/23/1991 | EP0409013A2 Vehicle exhaust gas measuring procedure and device |
| 08/07/1990 | US4946801 Gallium,aluminum,arsenic intermetallics |
| 05/03/1990 | DE3935381A1 Testing engine exhaust purifier at idling speed - by concn. change in injected nitrogen oxide |
| 04/25/1990 | EP0364973A2 Method of delivering a code signal for motor vehicle parts, and apparatus to perform this method |
| 03/22/1990 | DE3830515A1 Method for checking the functioning of the exhaust catalyser of an internal combustion engine |
| 11/28/1989 | US4884066 Deterioration detector system for catalyst in use for emission gas purifier |
| 11/07/1989 | US4878380 Internal combustion engine |
| 10/19/1989 | DE3811732A1 Circuit arrangement for testing the functioning of the catalytic converter of motor vehicles |
| 05/24/1989 | EP0317228A2 Epitaxial wafer |
| 05/02/1989 | CA1253595A1 Double air-fuel ratio sensor system in internal combustion engine |
| 01/11/1989 | EP0298240A2 Process and device for controlling the concentration of noxious matter in the exhaust gases from combustion engines |
| 12/14/1988 | EP0294715A2 Process for testing the efficacy of a catalyst |
| 10/13/1988 | DE3809082A1 Method for analysing a plurality of gas samples at least approximately simultaneously |
| 10/06/1988 | WO1988007622A1 Process for monitoring the performance of catalysers |
| 10/06/1988 | DE3710268A1 Verfahren zur funktionsueberwachung von katalysatoren Method for FUNCTION MONITORING of catalysts |
| 07/28/1988 | DE3736259A1 Device for determining the degree of conversion of a catalyst/catalytic converter |