| 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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| 07/19/1989 | EP0323956A1 Spark plug provided with a measurement device. |
| 07/18/1989 | US4849946 Piezo-electric transducer comprising several coaxial sensitive elements |
| 07/04/1989 | US4843887 Method and device for measuring pressures in tubular bodies |
| 06/28/1989 | EP0322122A2 Pressure sensor |
| 06/20/1989 | US4840158 Ignition timing control apparatus for an internal combustion engine |
| 06/13/1989 | US4838228 Ignition timing control apparatus |
| 06/06/1989 | US4836015 Method and apparatus for determining the compression ratio of an engine cylinder |
| 05/24/1989 | EP0317163A2 Cylinder pressure sensor for an internal combustion engine |
| 05/17/1989 | EP0316257A2 Piezoelectric sensor |
| 05/05/1989 | WO1989003983A1 Process for determining and evaluating the combustion pressure of an internal combustion engine |
| 05/03/1989 | EP0313884A2 Procedure for detecting and processing a knocking signal during operation of a externally ignited engine with internal combustion |
| 04/20/1989 | WO1989003520A1 Ionisation sensor |
| 04/11/1989 | US4821194 Cylinder combustion monitoring apparatus |
| 03/28/1989 | US4816713 Piezoelectric sensor with FET amplified output |
| 03/28/1989 | CA1251841A1 Stall surge detector |
| 03/08/1989 | EP0219509B1 Spark plugs with a pressure measurement device |
| 03/07/1989 | US4809540 Method and apparatus for testing internal combustion engines |
| 02/23/1989 | DE3727221A1 Sensor for pressure (compressive) force |
| 02/21/1989 | US4805442 Knocking sensor for internal combustion engine |
| 02/07/1989 | US4803671 Sensor for acoustic shockwave pulses |
| 02/07/1989 | US4802454 Device for controlling ignition timing in internal combustion engine |
| 01/24/1989 | US4800500 Method of detecting cylinder pressure in internal combustion engine |
| 01/18/1989 | EP0298966A1 Pressure sensor. |
| 01/11/1989 | CN1030330A Piezoelectric transducer with multiple sensitive coaxial elements |
| 01/04/1989 | EP0297948A1 Piezoelectric transducer comprising several coaxial sensitive elements |
| 12/20/1988 | US4792912 System for estimating thermal stress of pressure parts |
| 12/15/1988 | WO1988009922A1 Knock detection circuit with gated automatic gain control |
| 12/07/1988 | EP0293573A1 Engine knock detecting and control system |
| 12/01/1988 | DE3817354A1 Sensor for the detection of kinetic energy, especially piezoelectric sensor for the detection of dynamic or kinetic energy |
| 11/17/1988 | WO1988008964A1 Detonation detector |
| 11/17/1988 | EP0290470A1 Pressure sensor. |
| 11/10/1988 | DE3714131A1 Pressure sensor for an internal-combustion engine having an increased thermal load capacity |
| 11/01/1988 | US4781059 Method and apparatus for detecting combustion pressure in engine |
| 10/18/1988 | US4777920 System for controlling ignition timing in an internal combustion engine and method therefor |
| 10/04/1988 | US4775816 For sensing a fluid pressure pulse |
| 10/04/1988 | US4774834 Engine Sensors |
| 09/28/1988 | EP0283524A1 Method of and device for measuring pressures in tubular bodies |
| 09/14/1988 | EP0282295A2 Internal Combustion engine control |
| 09/07/1988 | EP0281377A2 Knock detection system |
| 08/30/1988 | US4767960 Cylinder pressure transmitter for an internal combustion engine |
| 08/23/1988 | CA1241088A1 Vibration sensor and the method of and apparatus for manufacture thereof |
| 08/16/1988 | CA1240761A1 Low viscous drag knock sensor |
| 08/09/1988 | US4761993 Method for monitoring the operation of an internal combustion engine |
| 08/09/1988 | US4761992 For an internal combustion engine |
| 08/02/1988 | US4760733 Method of detecting cylinder pressure in internal combustion engine |
| 07/12/1988 | US4756192 Shock wave sensor |
| 06/28/1988 | US4753109 Pressure sensitive element of aluminum oxide, strain-responsive resistors; silicon on sapphire |
| 06/07/1988 | US4750103 System and method for detecting and controlling knocking in an internal combustion engine |
| 06/01/1988 | EP0269606A2 Method of and device for testing an internal-combustion engine |
| 05/18/1988 | CN86107745A Automatic display of electrically measured indicator diagram |
| 05/17/1988 | USRE32667 Gated knock detector for internal-combustion engines |
| 05/17/1988 | US4744244 Cylinder pressure sensor output compensation method for internal combustion engine |
| 04/26/1988 | US4739649 Method of and apparatus for detecting maximum cylinder pressure angle in internal combustion engine |
| 04/12/1988 | US4736620 Magnetostrictive element for measuring knock in engines |
| 04/05/1988 | US4735091 High pressure transducer |
| 03/29/1988 | CA1234618A1 Piezoelectric transducer and pressure sensor using such a transducer |
| 03/24/1988 | WO1988002108A1 Spark plug provided with a measurement device |
| 03/16/1988 | EP0260177A1 Device for detecting irregular combustion fluctuations in a cylinder of an internal-combustion engine with controlled ignition |
| 02/23/1988 | US4727279 Piezoelectric knock sensor |
| 02/10/1988 | EP0255636A1 Acoustic shock wave sensor |
| 01/28/1988 | WO1988000654A1 Knock controller of internal combustion engine |
| 01/20/1988 | EP0252960A1 Gated knock detector for internal-combustion engines. |
| 01/13/1988 | EP0252793A1 Procedure for measuring the atmospheric pressure for an internal combustion motor |
| 01/05/1988 | US4716759 Method of detecting cylinder pressure and cylinder pressure detection device in internal combustion engine |
| 12/29/1987 | CA1230751A1 Engine combustion chamber pressure sensor |
| 12/15/1987 | US4713619 Electronic device for feeding ion pump |
| 12/08/1987 | US4712036 Pressure transducer having a piezoelectric element for pressure measurements at high temperatures particularly for the combustion chamber pressure of internal combustion engines |
| 12/08/1987 | US4711129 Pressure sensor |
| 12/02/1987 | CN87200791U Damping hole buffer for pressure gauge |
| 11/10/1987 | US4704894 Resonating knock sensor |
| 10/21/1987 | EP0241781A1 Operating supervision method for a running internal-combustion engine |
| 10/15/1987 | DE3643956A1 Knock sensor |
| 10/13/1987 | US4699106 Knock control system for internal combustion engines |
| 10/08/1987 | WO1987005998A1 Pressure sensor |
| 10/08/1987 | WO1987005997A1 Pressure sensor |
| 09/30/1987 | EP0041501B1 Piezoelectric transducer for fuel injection engine |
| 09/30/1987 | CN86206594U Shock resisting pressure gauge |
| 09/15/1987 | US4693221 In an internal combustion engine |
| 09/02/1987 | EP0233929A1 Device for monitoring injection of fuel |
| 08/20/1987 | DE3704839A1 Ignition timing control for internal combustion engine |
| 08/18/1987 | US4686861 Gasket type pressure sensor |
| 08/13/1987 | DE3604088A1 Pressure sensor |
| 08/05/1987 | EP0230491A1 Sensor, especially for high-pressure measurements |
| 07/16/1987 | WO1987004219A1 Gated knock detector for internal-combustion engines |
| 07/14/1987 | US4679536 Engine combustion condition detecting system and method |
| 07/14/1987 | US4679488 Integral rotational displacement sensor for an hydraulic motor |
| 07/14/1987 | US4679438 High pressure transducer |
| 07/08/1987 | CN86204260U Integral membrance used in diesel explosive pressure measuring |
| 07/01/1987 | EP0226742A2 Pressure transducer for measuring pressures at high temperatures |
| 06/23/1987 | US4675821 In an engine |
| 06/16/1987 | US4672839 Vibration sensor |
| 05/26/1987 | US4667637 Gated knock detector for internal-combustion engines |
| 05/26/1987 | CA1222317A1 Method of determining engine cylinder compression pressure and power output |
| 05/19/1987 | US4665737 Device for detecting pressure fluctuations in a combustion chamber of internal combustion engine |
| 05/19/1987 | US4665689 Exhaust system for the combustion gases of an internal combustion engine |
| 05/12/1987 | US4664083 Adaptive knock control with variable knock tuning |
| 05/05/1987 | US4662226 Pressure transducer |
| 04/29/1987 | EP0219631A2 Resistive-pressure sensor |
| 04/28/1987 | US4660535 System and method for controlling ignition timing of an internal combustion engine |
| 04/28/1987 | US4660517 Vibration detecting apparatus for multi-rotor rotary piston engines |