| Patents for G01M 15 - Testing of engines (13,067) |
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| 12/23/1993 | WO1993025811A1 Method of detecting misfire by utilizing variation of rotation of crankshaft |
| 12/23/1993 | WO1993025810A1 Method of detecting misfire by utilizing variation of rotation of crankshaft |
| 12/23/1993 | WO1993025809A1 Misfire detecting method |
| 12/23/1993 | DE4318501A1 Diagnosis appts. for testing combustion conditions of multicylinder IC engine - measures revolution rate for each cylinder and computes state parameter deviations using stored function patterns |
| 12/23/1993 | DE4220286A1 Functional testing of control element in motor vehicle, esp. idling positioning element - varying parameter without adjusting control element and then adjusting element according to resulting change and checking functional relationship |
| 12/16/1993 | DE4319787A1 Misfire detector for IC engine - contains crankshaft revolution rate sensor for generating signals related to ignition periods, and arithmetic units for detecting persistent and intermittent misfires. |
| 12/16/1993 | DE4318282A1 Faulty ignition determination system for IC engine with microcomputer - includes circuit for giving reference duration signals which represent crank angle positions corresp. to ignition cycle of engine, also includes time relationship detector. |
| 12/15/1993 | EP0573569A1 Internal combustion engine mapping apparatus and method |
| 12/14/1993 | US5269178 Engine misfire, knock of roughness detection method and apparatus |
| 12/09/1993 | WO1993024751A2 Misfire detection in an internal combustion engine using exhaust pressure |
| 12/09/1993 | WO1993024747A1 Oxygen sensor monitoring |
| 12/07/1993 | US5268843 Engine misfiring determining device |
| 12/07/1993 | US5267544 Crank angle and cylinder number detecting system and method for internal combustion engine |
| 12/07/1993 | US5267542 Electronic control module |
| 12/07/1993 | US5267472 Method and arrangement for determining the performance loss of a catalyzer |
| 12/07/1993 | US5267439 Method and arrangement for checking the aging condition of a catalyzer |
| 11/30/1993 | US5267164 Method and system for correcting a knock detection period and for detecting knock generated in an automotive engine |
| 11/30/1993 | US5265468 Error detection and display system |
| 11/23/1993 | US5263453 Apparatus for detecting misfire in internal combustion engines for vehicles |
| 11/23/1993 | US5263452 Knocking detector for internal combustion engine |
| 11/23/1993 | US5263365 System for detecting misfires in an internal combustion engine |
| 11/23/1993 | US5263364 Apparatus for detecting misfire in multicylinder internal combustion engines |
| 11/18/1993 | EP0570229A2 Abnormal sound detecting apparatus |
| 11/18/1993 | EP0396665B1 Power measurement apparatus |
| 11/18/1993 | DE4216067A1 Fuel tank ventilation system for car - has control unit to close valve between adsorption filter and manifold if tank partial pressure exceeds threshold |
| 11/18/1993 | DE4216058A1 Correcting position of top dead centre reference marker in IC engine - using pressure variation measurement relating to crankshaft angle without combustion operation at different positions of marker and calculating pressure differences. |
| 11/18/1993 | DE4216044A1 Diagnosis system for IC engine with EGR - has diagnosis unit to establish difference in misfire frequencies between two positions of recirculation control valve |
| 11/18/1993 | DE4215938A1 Misfire detection system for vehicle IC engine - compares wheel irregularity value derived from rotation rate with threshold value and blocks misfire detection if threshold is exceeded. |
| 11/16/1993 | US5261369 Process and device for determining operating characteristics of a combustion engine with independently fed cylinders |
| 11/16/1993 | US5261271 Exhaust backpressure tester |
| 11/11/1993 | WO1993022648A1 Method and device for monitoring an engine |
| 11/11/1993 | DE4313368A1 Measurement of metal constituents in combustion gases - from light emission of gas in plasma flame |
| 11/02/1993 | US5258930 Piston ring wear diagnostic device and procedure therefor |
| 11/02/1993 | US5257533 Misfire detection device for an internal combustion engine |
| 10/28/1993 | WO1993021508A1 Process and device for detecting combustion irregularities in an engine particularly at medium and high speed |
| 10/28/1993 | DE4213640A1 Detecting soot particle emissions of diesel engines, esp. for motor vehicle - measuring quantity of soot collected in soot filter during engine test operation with preset motor power, speed, torque and load. |
| 10/26/1993 | US5257190 Interactive dynamic realtime management system for powered vehicles |
| 10/26/1993 | US5255560 Apparatus and process for measuring the irregular running of an internal combustion engine and application of the process |
| 10/26/1993 | US5255515 Method and arrangement for obtaining an evaluation value for the performance loss of a catalytic converter |
| 10/21/1993 | DE4212973A1 Housing sealing cover for vehicle crankshaft - has sensor for determining speed or angle and ring for sealing lip functioning as pulse transmitter for sensor |
| 10/19/1993 | US5255209 Method for determining the combustion chamber pressure in a cylinder of an internal-combustion engine with a pressure sensor |
| 10/14/1993 | WO1993020427A1 Error correction in measures of speed, acceleration, misfire detection and roughness |
| 10/12/1993 | US5252828 Mobile exhaust tracking system |
| 10/07/1993 | DE4211116A1 On-board detection of state of IC engine exhaust catalyser - increasing lean-rich cycle until exhaust gas probe signal indicates noticeable change to determine oxygen@ storage capacity |
| 10/06/1993 | EP0563347A1 Process for adapting mechanical tolerances of a pick-up wheel. |
| 10/06/1993 | EP0563066A1 Diagnostic device for detecting defective combustion in an internal combustion engine |
| 10/06/1993 | EP0481975B1 Process and device for lambda value control |
| 10/05/1993 | US5249459 Diagnostic process for checking actuators for the control of internal combustion engines |
| 09/30/1993 | DE4207403A1 Cylinder head seal for internal combustion engine - contains sealing support as temp. sensitive element between combustion chamber openings |
| 09/23/1993 | DE4306479A1 Cylinder identification device e.g. for multicylinder IC engine - over-writes second shift-register sequence with corrected version when difference between sequences is ascribed to misfiring |
| 09/23/1993 | DE4208292A1 Exhaust flange seal for internal combustion engine - contains ion current sensor with two electrodes protruding into combustion gas aperture. |
| 09/22/1993 | EP0560921A1 Process for recognizing abnormal combustion in a cylinder of an internal combustion engine. |
| 09/22/1993 | EP0560793A1 Method of detecting irregular combustion in an engine cylinder |
| 09/21/1993 | US5245866 Device for detecting occurrence of misfiring in multicylinder engine |
| 09/21/1993 | US5245865 Device for determining misfiring cylinder of multicylinder engine |
| 09/16/1993 | DE4207506A1 IC engine misfire detection appts. - integrates sensor of physical or chemical characteristic which changes with misfiring into sealing element |
| 09/14/1993 | US5243851 Portable in-field engine tester |
| 09/07/1993 | US5241855 Method and apparatus for inferring engine torque |
| 09/07/1993 | US5241853 Exhaust fume sampling apparatus for a two-stroke gasoline engine with a closed loop engine control unit |
| 09/02/1993 | WO1993017233A1 Method and device for judging misfire of internal combustion engine |
| 09/01/1993 | CN2141561Y Multi-function ingine tester |
| 08/31/1993 | US5241480 Method and apparatus for detecting combustion conditions in multicylinder internal combustion engine based upon engine speed evaluation |
| 08/31/1993 | US5239971 Trouble diagnosis device for exhaust gas recirculation system |
| 08/31/1993 | US5239858 Method and apparatus for the automated testing of vehicle fuel evaporation control systems |
| 08/24/1993 | US5239473 Method and system for detecting the misfire of an internal combustion engine utilizing angular velocity fluctuations |
| 08/24/1993 | US5237862 Adaptive method of cylinder misfire detection in an internal combustion engine |
| 08/17/1993 | US5237504 Method of and apparatus for detecting misfire |
| 08/17/1993 | US5237278 Ignition signal sampling device for an ignition system, especially for an internal combustion engine |
| 08/17/1993 | US5236330 Measuring the oxygen content in the combustion products gas stream |
| 08/05/1993 | WO1993014900A1 Method for optimization of lateral surface profile of piston and of minimal gap between the piston and cylinder at the cold condition of the engine |
| 08/04/1993 | EP0553472A2 Process and appliance for testing an apparatus which comprises at least one microprocessor |
| 08/03/1993 | US5231869 Method and arrangement for determining misfires in an internal combustion engine |
| 07/28/1993 | EP0553031A1 Procedure for misfire detection in an internal combustion engine |
| 07/28/1993 | CN1074760A No Load engine dynamic performance testing and measurement method and devices thereof |
| 07/21/1993 | EP0551764A2 Method and apparatus for misfire and rough road detection |
| 07/20/1993 | US5229945 Apparatus for detecting and calculating the indicated mean effective pressure for a multi-cylinder engine during real time |
| 07/20/1993 | CA1320354C Method of and apparatus for determining the engine power of an automotive vehicle |
| 07/07/1993 | CN2137786Y Program automatic controlling instrument for cold-pulling of automobile engine |
| 06/29/1993 | US5222392 Control system with misfire detection function for internal combustion engine |
| 06/24/1993 | WO1993012332A1 Method for diagnosing an engine using computer based models |
| 06/24/1993 | DE4243339A1 Monitoring system for engine exhaust gas purification arrangement - contains fuel-air or oxygen conc. sensors upstream and downstream of catalyser, filter and correlation function system |
| 06/23/1993 | EP0547936A1 Method and device for generating non contaminated air gust by high enthalpy |
| 06/23/1993 | CN2136980Y Portable test instrument for engine of vehicle |
| 06/19/1993 | CA2085438A1 Method and installation for generating a high mass flow of unpolluted high enthalpy air |
| 06/17/1993 | DE4140925A1 IC engine RPM maintaining device for exhaust emission testing - has mobile operating control acting directly on accelerator pedal to maintain constant required RPM |
| 06/16/1993 | CN2136468Y Air valve tightness tester |
| 06/15/1993 | US5219398 Control device for internal combustion engine |
| 06/15/1993 | US5219227 Method and apparatus for determining burned gas temperature, trapped mass and NOx emissions in an internal combustion engine |
| 06/15/1993 | US5218860 Automatic motor testing method and apparatus |
| 06/15/1993 | US5218857 Exhaust-gas analyzer |
| 06/09/1993 | EP0545122A1 Positive pressure canister purge system integrity confirmation |
| 06/08/1993 | US5216991 Internal combustion engine controller |
| 06/08/1993 | US5216915 Misfire diagnosis apparatus for an internal combustion engine |
| 06/08/1993 | US5216881 Arrangement for determining the engine speed and an additional operating characteristic variable of an internal combustion engine by means of a sensor |
| 06/03/1993 | CA2082684A1 Positive pressure canister purge system integrity confirmation |
| 06/01/1993 | US5214958 Misfiring detecting apparatus for an internal combustion device |
| 06/01/1993 | US5214915 Method and arrangement for simulating the dynamic performance of an exhaust gas catalyzer |
| 05/27/1993 | DE4239803A1 Ionisation current detector for IC engine ignition monitor - measures ionisation current through ignition coils during combustion of gas mixture |
| 05/27/1993 | DE4238807A1 IC engine exhaust gas catalyser monitoring system - uses cross-correlation function for signals from oxygen@ sensors inserted in exhaust line before and after catalyser |
| 05/25/1993 | US5213251 Method for fabricating a wear-resistant magnet-containing component and resulting article |