| Patents for F01N 11 - Monitoring or diagnostic devices for exhaust-gas treatment apparatus (7,022) |
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| 05/31/1995 | EP0655104A1 Process for monitoring the operation of a catalytic converter |
| 05/30/1995 | US5419122 Detection of catalytic converter operability by light-off time determination |
| 05/23/1995 | US5417061 Device for detecting catalyst deterioration for an internal combustion engine |
| 05/23/1995 | US5417058 Device for detecting deterioration of a catalytic converter for an engine |
| 05/18/1995 | DE4338547A1 Monitoring catalyser in motor vehicle |
| 05/16/1995 | US5416710 Method of detecting deterioration of a three-way catalyst of an internal combustion engine |
| 05/16/1995 | US5414996 Device for detecting the degree of deterioration of a catalyst |
| 05/16/1995 | US5414995 Failure detection system for air-fuel ratio control system |
| 05/11/1995 | WO1995012752A1 Device and method for estimating the temperature of a catalyst of a vehicle |
| 05/11/1995 | DE4338342A1 Method and device for forming a simulated signal referring to the exhaust temperature, the exhaust probe temperature or the catalytic converter temperature |
| 05/11/1995 | DE4337793A1 Method and device for assessing the functional condition of a catalytic converter |
| 05/10/1995 | EP0652357A1 Determining the efficacy of a catalytic converter |
| 05/09/1995 | US5412943 Apparatus and method for introducing secondary air for cleaning exhaust emissions from internal combustion engine |
| 05/09/1995 | US5412942 Catalytic converter deterioration detecting system for engine |
| 05/09/1995 | US5412941 Device for determining deterioration of a catalytic converter for an engine |
| 04/27/1995 | DE4336091A1 Device for monitoring an electric heating element in a catalytic converter of a motor vehicle |
| 04/18/1995 | US5408215 Catalyst monitoring using a hydrocarbon sensor |
| 04/18/1995 | US5406789 Air-fuel ratio control system for internal combustion engines |
| 04/18/1995 | US5406788 Method and apparatus for monitoring a system for delivering secondary air to the exhaust gas internal combustion engine |
| 04/11/1995 | US5404718 Engine control system |
| 04/06/1995 | DE4434875A1 Verfahren zur Beurteilung des Überwachungszustandes bei der Diagnose eines Motors Method for assessing the monitoring state in the diagnosis of an engine |
| 03/30/1995 | DE4332946A1 Meßvorrichtung zur Füllstandsbestimmung eines Mediums und Verfahren zur Steuerung des Motors Measuring device to determine level of a medium and method for controlling the motor |
| 03/29/1995 | EP0645533A1 Engine air/fuel ratio control system |
| 03/28/1995 | US5400592 Diagnostic apparatus for catalytic converter of an internal combustion engine |
| 03/28/1995 | US5400591 Means for preventing exhaust emission from being deteriorated in case of trouble of secondary air supply system |
| 03/21/1995 | US5398501 Air-fuel ratio control system for internal combustion engines |
| 03/16/1995 | DE4330997A1 Method for monitoring the light-off performance of a catalytic converter system in a motor vehicle |
| 03/14/1995 | US5396794 Engine catalyst aging system and method for aging catalyst |
| 03/14/1995 | US5396766 Abnormality-detecting device for internal combustion engines |
| 03/08/1995 | EP0641920A1 Malfunction diagnosis apparatus for internal combustion engine |
| 03/07/1995 | US5394744 Fault detection using averaging filter with variable response time |
| 03/07/1995 | US5394691 Air-fuel ratio control system for internal combustion engines having a plurality of cylinder groups |
| 03/01/1995 | EP0595939B1 Catalytic converter efficiency monitoring |
| 03/01/1995 | EP0536158B1 Process for protection of catalysts |
| 02/23/1995 | DE4426788A1 Method for taking into account the actual degree of conversion of an exhaust emission control device |
| 02/21/1995 | US5390491 Ignition timing control system for internal combustion engine |
| 02/21/1995 | US5390490 In an internal combustion engine |
| 02/15/1995 | EP0638709A1 Exhaust device for internal combustion engines |
| 02/09/1995 | DE4405706A1 Exhaust system for IC engine - has protective system of opening with fusible cut-out in exhaust pipe |
| 02/07/1995 | US5386695 Air-fuel ratio control system for internal combustion engines, having catalytic converter deterioration-detecting function |
| 02/07/1995 | US5386693 Engine air/fuel control system with catalytic converter monitoring |
| 02/07/1995 | CA2022702C Method and apparatus for detecting soot concentration in particulate trap |
| 02/01/1995 | EP0636955A1 Control unit for vehicle and total control system therefor |
| 02/01/1995 | EP0636771A1 Method of and apparatus for monitoring operation of a catalyst |
| 02/01/1995 | EP0636770A1 Exhaust gas cleaning device for an internal combustion engine |
| 01/31/1995 | US5385134 System for monitoring leakage into exhaust lines |
| 01/31/1995 | US5385016 Air/fuel control system responsive to duo upstream EGO sensors with converter monitoring |
| 01/26/1995 | DE4323243A1 Demand-oriented heating method for a catalytic converter in the exhaust gas system of an internal combustion engine |
| 01/18/1995 | EP0634567A1 Adaptation of a method to detect the catalytic efficiency of catalytic converters with different efficiencies |
| 01/17/1995 | US5381658 Diagnostic apparatus for use in an exhaust system of an internal combustion engine |
| 01/17/1995 | US5381657 Catalyst deterioration-detecting system for internal combustion engines |
| 01/17/1995 | US5381656 Engine air/fuel control system with catalytic converter monitoring |
| 01/10/1995 | US5379587 Apparatus for judging deterioration of catalyst of internal combustion engine |
| 01/03/1995 | US5377484 Device for detecting deterioration of a catalytic converter for an engine |
| 12/22/1994 | DE4319924A1 Method for monitoring the function of a catalytic converter |
| 12/20/1994 | US5373733 Exhaust filter backpressure indicator |
| 12/13/1994 | US5372036 Exhaust leak detection |
| 12/08/1994 | WO1994028292A1 Catalyst effectiveness checking process |
| 11/30/1994 | EP0626507A1 System for diagnosing deterioration of catalyst |
| 11/30/1994 | EP0626506A1 Methode for monitoring catalyst efficiency |
| 11/15/1994 | US5365216 Catalyst monitoring using ego sensors |
| 11/15/1994 | US5363647 Dual-sensor type air fuel ratio control system for internal combustion engine and catalytic converter diagnosis apparatus for the same |
| 11/15/1994 | US5363646 Engine air/fuel control system with catalytic converter monitoring |
| 11/08/1994 | US5363091 Catalyst monitoring using ego sensors |
| 11/01/1994 | US5359853 Device for detecting deterioration of a catalytic converter for an engine |
| 10/25/1994 | US5357754 Catalyst deterioration-detecting device for internal combustion engines |
| 10/25/1994 | US5357753 Catalyst monitor for a Y pipe exhaust configuration |
| 10/25/1994 | US5357751 Air/fuel control system providing catalytic monitoring |
| 10/25/1994 | US5357750 Method for detecting deterioration of catalyst and measuring conversion efficiency thereof with an air/fuel ratio sensor |
| 10/18/1994 | US5355671 Method and apparatus for monitoring the function of a catalytic converter |
| 10/13/1994 | DE4412191A1 Diagnostic device for an exhaust purification system |
| 10/12/1994 | EP0619420A1 An air/fuel control system providing monitoring of activity of a catalytic converter |
| 10/11/1994 | US5353592 Engine air/fuel control with monitoring |
| 10/04/1994 | US5351526 Apparatus for monitoring leakage into exhaust lines |
| 10/04/1994 | US5351484 Light-off catalyst monitor |
| 09/29/1994 | WO1994021902A1 Process and device for monitoring the operation of a catalytic converter |
| 09/29/1994 | WO1994021901A1 Process for checking the conversion capability of a catalyst |
| 09/29/1994 | DE4309854A1 Method and device for controlling the secondary air feed for an internal combustion engine |
| 09/29/1994 | DE4307916C1 Temperature monitoring device with energy supplied by a thermocouple |
| 09/22/1994 | DE4408648A1 Test method for a secondary air feed of an exhaust system |
| 09/22/1994 | DE4308180A1 Method for the heating of an exhaust catalytic converter in motor vehicles |
| 09/15/1994 | WO1994020738A1 Method of determining the efficiency of a catalytic converter |
| 09/15/1994 | WO1994020737A1 Heated catalytic converter efficiency monitoring method |
| 09/15/1994 | DE4404449A1 Diagnostic device for a catalytic converter of an internal combustion engine |
| 09/07/1994 | EP0614004A1 Air-fuel ratio control system for internal combustion engines having a plurality of cylinder groups |
| 08/30/1994 | US5342783 Method for detecting a reaction zone in a catalytic converter |
| 08/30/1994 | US5341642 System for diagnosing engine exhaust gas purifying device and system for diagnosing sensor |
| 08/24/1994 | EP0611415A1 Method for monitoring the efficiency of a catalytic converter for treating exhaust gases from an internal combustion engine. |
| 08/23/1994 | US5339628 Method for monitoring the catalytic activity of a catalytic converter in the exhaust gas system of an internal combustion engine |
| 08/23/1994 | US5339627 Method and apparatus for regulating and testing |
| 08/18/1994 | DE4402850A1 System for monitoring and controlling internal combustion engines and their exhaust gas emissions, using gas sensors |
| 08/18/1994 | DE4304144A1 Exhaust gas converter device for an internal combustion engine |
| 08/16/1994 | US5337558 Engine exhaust purification system |
| 08/16/1994 | US5337556 Detecting device and method for engine catalyst deterioration |
| 08/16/1994 | US5337555 Failure detection system for air-fuel ratio control system |
| 08/10/1994 | EP0609527A1 Method for examining the performance of exhaust gas catalyzer |
| 08/09/1994 | US5335538 Method and arrangement for determining the storage capacity of a catalytic converter |
| 08/04/1994 | WO1994017291A1 Exhaust gas cleaning device for an internal combustion engine |
| 08/02/1994 | US5333446 Diagnostic system for a secondary air supplier in an engine |
| 07/21/1994 | WO1994016205A1 Exhaust filter backpressure indicator |