| Patents for G01L 23 - Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid (3,845) |
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| 02/02/1994 | EP0581067A1 Spark plug with built-in pressure sensor |
| 01/19/1994 | EP0579226A2 Force transducer and pressure detecting circuit using the same |
| 01/04/1994 | US5276625 System for detecting and adjusting for variation in cylinder pressure in internal combustion engine |
| 01/04/1994 | US5275053 Fiber optic pressure sensor systems |
| 12/21/1993 | US5271265 Process and device for sensing and evaluating knocking combustion during operation of an internal combustion engine |
| 12/14/1993 | US5269178 Engine misfire, knock of roughness detection method and apparatus |
| 11/24/1993 | CN1022864C On-line analyzer for vapour pressure of gasoline |
| 11/23/1993 | US5263452 Knocking detector for internal combustion engine |
| 11/16/1993 | USRE34441 Pressure 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 | WO1993020424A1 Method and device for detecting knocking in an internal-combustion engine |
| 10/14/1993 | DE4211645A1 Verfahren und Vorrichtung zur Erkennung des Klopfens einer Brennkraftmaschine Method and apparatus for detecting knocking in an internal combustion engine |
| 10/05/1993 | US5249468 Pressure sensor for detecting the pressure in the combustion chamber 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 | DE4308666A1 Pressure sensor e.g. for vehicle engine combustion chamber - contains movable structure acting on piezoelectric transducer which is in series with dielectric having capacitance of opposite temp. characteristic wrt transducer |
| 09/22/1993 | EP0561397A2 A pressure sensor |
| 09/16/1993 | DE4207495A1 Arrangement for detecting abnormal combustion knocking or misfiring in IC engines - contains expansion measurement element mounted on seal flange between cylinder head and block |
| 09/08/1993 | EP0559112A2 Procedure and device for measuring the power of piston combustion engines |
| 08/31/1993 | US5239869 Acceleration detector |
| 08/17/1993 | US5235953 Ignition timing control system for internal combustion engines |
| 08/11/1993 | EP0554289A1 Mounting a sensor in a combustion chamber. |
| 08/05/1993 | WO1993015384A1 Device for detecting knocking in an internal combustion engine |
| 08/05/1993 | DE4303228A1 Pressure sensor, esp. for detecting liquid pressure - has hollow main body with divided pressure chamber, detection chamber sealed by metal membrane and filled with pressure transfer liquid |
| 08/04/1993 | EP0423130B1 Method and apparatus for measuring detonation in an internal combustion engine |
| 08/04/1993 | EP0394234B1 Method of detecting knocking in internal combustion engines |
| 07/29/1993 | DE4201567A1 Einrichtung zur erkennung des klopfens einer brennkraftmaschine Means for detecting knocking in an internal combustion engine |
| 07/27/1993 | US5230316 Method and apparatus for detecting knock in an internal combustion engine |
| 07/27/1993 | US5230238 Knock sensing apparatus |
| 07/22/1993 | WO1993014387A1 Determining top dead centre |
| 07/21/1993 | EP0551538A1 Charge amplifier |
| 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 | US5228333 Pressure and heat-flow sensor for the combustion chamber of internal combustion engines |
| 07/13/1993 | US5226325 Acceleration detector with radial arm diaphragm |
| 07/07/1993 | EP0550411A2 Knock control system for internal combustion engine |
| 07/07/1993 | EP0549676A1 Spark-ignition engine |
| 06/30/1993 | EP0549346A2 Piezoelectric fluid pressure sensor |
| 06/23/1993 | EP0548043A2 Pressure sensor |
| 06/22/1993 | US5220821 Method of detecting knock in internal combustion engines |
| 06/15/1993 | US5218870 Vibration sensor including a reduced capacity lower portion for maintaining airtightness and enhancing reliability |
| 06/01/1993 | CA1318725C Piezoelectric sensor |
| 05/27/1993 | WO1993010430A1 Silicon chip for use in a force-detection sensor |
| 05/19/1993 | DE4137624A1 Silizium-chip zur verwendung in einem kraftsensor Silicon chip for use in a force sensor |
| 04/28/1993 | EP0539071A2 Knock processing circuit |
| 04/27/1993 | US5206809 Heat measuring system for detecting knock in internal combustion engine |
| 04/27/1993 | US5205258 For an internal combustion engine |
| 04/13/1993 | US5201292 Apparatus and method for detecting vibration patterns |
| 04/08/1993 | DE4132842A1 Glow plug with sensor element enabling physical parameter measurement - has off-centre heating rod pressed into bore in plug body parallel to sensor element bore |
| 04/06/1993 | US5199303 Pressure sensor for determination of pressure in the combustion chamber of an internal combustion engine |
| 03/23/1993 | US5195365 Device for detecting combustion pressure of an internal combustion engine |
| 03/23/1993 | US5195359 Apparatus for detecting operating condition of internal-combustion engine |
| 03/05/1993 | CA2050609A1 Fiber-optic strain gauge manometer |
| 03/03/1993 | EP0529786A2 Apparatus and method for detecting vibration patterns |
| 03/01/1993 | CA2073230A1 Apparatus and method for detecting vibration patterns |
| 02/24/1993 | EP0528657A2 Improved fiber optic pressure sensor systems |
| 02/23/1993 | US5188080 Knocking control system for internal combustion engine |
| 02/22/1993 | CA2068033A1 Fiberoptic pressure sensor systems |
| 02/16/1993 | US5187674 For determining fuel gas pressure |
| 02/16/1993 | US5186145 Knocking control apparatus for internal combustion engine |
| 02/04/1993 | WO1993002341A1 Knock sensor |
| 01/21/1993 | DE4223649A1 Knock detector for vehicle IC engine - digitises and filters knock sensor signal using two digital filters with centre frequency shifting depending on resonance frequency components |
| 01/21/1993 | DE4123786A1 Klopfsensor Knock Sensor |
| 01/19/1993 | US5180983 Ignition plug for an internal combustion engine provided with an ionization current detector electrode |
| 01/19/1993 | US5179857 Monitoring system for cyclically operating machines |
| 01/13/1993 | EP0448603A4 System for monitoring and controlling engine performance |
| 01/05/1993 | US5176032 Method and apparatus for processing electrical signals and a stress wave sensor |
| 12/30/1992 | EP0520380A1 Gasket with encased load sensor |
| 12/16/1992 | EP0517774A1 Process and device for measuring the variation in internal pressure in the cylinder of a piston engine. |
| 12/10/1992 | WO1992021950A1 Pinking detection process |
| 12/03/1992 | DE4117807A1 Verfahren zur klopferkennung Method for knock detection |
| 11/12/1992 | WO1992019947A1 Process and device for detecting knocking combustion in an internal combustion engine |
| 11/04/1992 | EP0511762A2 Piezoelectric sensor |
| 10/29/1992 | DE4113290A1 Verfahren und vorrichtung zur erkennung einer klopfenden verbrennung in einer brennkraftmaschine Method and apparatus for detection of knocking combustion in an internal combustion engine |
| 10/28/1992 | EP0510515A1 Device for temporarily holding pressure sensor in place within spark plug attaching hole of cylinder head |
| 10/28/1992 | EP0400060B1 Device for measuring pressure |
| 10/22/1992 | DE4112309A1 Sensor for pressure pulses e.g. in IC engine combustion chamber - compensates for dependent variations in transfer liq. chamber vol. by varying chamber capacity |
| 10/22/1992 | DE4103327A1 Selected cylinder pressure measurer for IC engine - uses glass fibre between cylinder head and engine block to detect pressure fluctuations via micro-curvature losses |
| 10/15/1992 | WO1992010733A3 Engine misfire, knock or roughness detection method and apparatus |
| 10/14/1992 | EP0508739A2 Device for detecting a change in internal pressure of a cylinder |
| 09/29/1992 | US5150606 Acceleration detector |
| 09/17/1992 | WO1992015851A1 Pressure sensor for determining the pressure in the combustion chamber of an internal combustion engine |
| 09/15/1992 | US5146777 Device for detecting pinking, cylinder by cylinder, in a multi-cylinder otto engine |
| 09/10/1992 | DE4206809A1 Knocking detector for IC engine - has digital frequency analyser supplied by vibration signals picked up from sensor for engine and=or cylinder internal pressure vibration |
| 09/03/1992 | DE4106102A1 Druckgeber zur druckerfassung im brennraum von brennkraftmaschinen Pressure transducer for sensing pressure in the combustion chamber of internal combustion engines |
| 08/25/1992 | US5140962 Knock sensing apparatus for an internal combustion engine |
| 08/13/1992 | DE4104179A1 Sensor for measuring high frequency sound waves in solids in IC engine - has piezoelectric element in housing with three small supporting feet, one of which feeds in sound |
| 08/05/1992 | EP0252960B1 Gated knock detector for internal-combustion engines |
| 08/04/1992 | US5134980 Knock generation control system for engines |
| 07/29/1992 | EP0495935A1 Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine. |
| 07/22/1992 | EP0383797B1 Process for determining and evaluating the combustion pressure of an internal combustion engine |
| 07/21/1992 | US5131368 Ignition timing control apparatus of internal-combustion engine |
| 07/15/1992 | EP0494423A2 System for detecting combustion state in internal combustion engine |
| 07/15/1992 | EP0494279A1 Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine |
| 07/15/1992 | CN1062788A Electronic control circuit of electric contact pressure gauge |
| 07/08/1992 | EP0493546A1 Pressure sensor for determination of the pressure in the combustion space of an internal-combustion engine. |
| 07/08/1992 | EP0493541A1 Pressure sensor for determination of the pressure in a combustion chamber of an internal-combustion engine |
| 07/02/1992 | DE4041621A1 Evaluation circuit for piezo-resistive pressure sensor - has resistive bridge contg. two piezo-resistive arms, operational amplifier all fitting on single hybrid |
| 07/01/1992 | EP0492467A2 Knocking control apparatus for internal combustion engine |
| 06/30/1992 | US5126617 Cylinder pressure sensor for an internal combustion engine |
| 06/25/1992 | WO1992010733A2 Engine misfire, knock or roughness detection method and apparatus |
| 06/25/1992 | CA2099613A1 Engine misfire, knock or roughness detection method and apparatus |