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WO/1992/001915A1 |
In the pressure sensor (11) proposed, the pressure is transmitted through a diaphragm (14) and a punch (18) to a piezo-resistive sensor element (19). Since no precise mechanical alignment is necessary between the diaphragm (14) and the p...
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WO/1992/001913A1 |
In the pressure sensor (11) proposed, the receiver (19), comprising a piezo-resistive thick-film resistance or a piezo-electric material, and the electronic components (23) of an electronic processing circuit are located on the substrate...
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WO/1992/001916A1 |
In the pressure sensor (11) disclosed, a sensor element (19) made of piezo-resistive material is located in a housing (10). The resistive films (23, 25) of this piezo-resistive sensor element (19) are compressed in the direction of the c...
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WO/1992/001912A1 |
In the pressure sensor proposed, the pressure is transmitted through a diaphragm (14) and a punch (18) to a piezo-resistive sensor element (19). The sensor element (19) is printed on the substrate of a hybrid circuit (22) and comprises s...
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WO/1991/019966A1 |
A combustion pressure sensor (11, 12, 13, 14) and heat flow sensor (21) integrated design is useful for determining physical parameters of the combustion process in an engine.
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WO/1991/018198A1 |
A cylinder head gasket to seal the gap between the engine block and the cylinder head of a multi-cylinder internal combustion engine having a sealing plate with several combustion chamber apertures, combustion chamber seals around their ...
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WO/1991/014929A1 |
In the pressure sensor (11) described, the sensor assembly (19), which is made of at least one piezo-electric material (21) and includes at least one contact disc (22, 23), and the electronic components (33) of an electrical processing c...
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WO/1991/014163A1 |
A circuit arrangement for detecting knocking in an internal combustion engine comprises a knock sensor connected to an evaluation circuit through a filter which separates the knock frequency. To obtain a simple circuit arrangement, a mix...
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WO/1991/013333A1 |
To measure the variation in a variable internal pressure in the cylinder of a piston-type internal combustion engine using measurement sensors in interaction with the outside of the cylinders, an acceleration, velocity or displacement si...
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WO/1991/012511A1 |
An internal combustion engine compression monitoring system characterized in that it includes: at least one spark plug (1) provided with a narrow hole (2) connecting the inner and the outer ends of the spark plug, the spark plug being li...
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WO/1991/005160A1 |
Disclosed is an apparatus for controlling the occurrence of engine knocking which includes a knocking sensor for detecting engine knocking; representative value detection means for detecting a representative value effective for knocking ...
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WO/1990/015243A1 |
In a process for detecting and evaluating knock signals in the individual cylinders of an internal combustion engine, the signals from a pressure sensor arranged in a combustion chamber of the cylinder of interest are converted, after am...
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WO/1990/007051A1 |
An engine crankshaft speed signal comprising pulses produced by a toothed wheel (17) and a sensor (41) is monitored to develop instantaneous power output vector signals, one for each engine cylinder (12-15). Engine knock is detected by c...
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WO/1990/005841A1 |
An engine management system is described which uses as a control parameter a signal which quantitatively represents the value of the pressure within a cylinder averaged over a combustion cycle. The signal representing the mean cylinder p...
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WO/1990/004093A1 |
A device for recognizing spark failures in an internal combustion engine has a sensor (15) for measuring the exhaust gas pressure and means (16, 17, 18) for recording the measurement value of the sensor during each cycle. Each exhaust ga...
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WO/1990/002932A1 |
A method and apparatus is provided for measuring detonation in an internal combustion engine (14). Vibration sensors (12) located on the engine (14) send signals through a filter (34) which is tuned to the cavity resonance frequency (f) ...
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WO/1990/000680A1 |
It is desirable for regulating purposes to detect the variations in pressure inside the working chamber (14) of fuel injection pumps (10) without removing the filler cap (20) and opening the fuel circuit. In order to measure the pressure...
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WO/1989/011087A1 |
In order to detect knocking in internal combustion engines, a signal relating to a property of the combustion of the fuel (e.g. the ionisation current) is detected in the cylinders of the engine. The signal is filtered to select those po...
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WO/1989/011031A1 |
An internal combustion engine (11) having a luminosity probe (18) and an arrangement for measuring certain parameters such as IMEP, combustion chamber pressure, heat release and the like by measuring luminosity in the chamber (16) and ad...
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WO/1989/011088A1 |
A knocking signal detection circuit includes threshold device (104) which has a threshold level which is raised when background noise and/or the level of knocking signals increases. The knocking signals are supplied to an amplifier (102)...
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WO/1989/009384A1 |
A pressure transducer (11) comprises a membrane (14) fastened by means of welded joints to the front face of the housing (10) facing the combustion chamber of an internal combustion engine. The pressure acting on the membrane (14) is tra...
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WO/1989/007241A1 |
Device for measuring a pulsating variable by fixed-angle double sampling with weak filtering. The pulsating variable is filtered and/or attenuated so as to obtain a virtually sinusoidal curve. The signal so obtained is sampled twice per ...
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WO/1989/003983A1 |
Conventional methods for determining the combustion pressure of an internal combustion engine are very costly and the sensors used must meet stringent requirements. The process described differs from this in that the combustion pressure ...
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WO/1989/003520A1 |
A cylinder head gasket is described which also serves as an electrode of an ionisation sensor. The gasket (16) has an electrically conductive surface portion (16c) which is electrically insulated from the cylinder head (14) and from the ...
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WO/1988/009922A1 |
A knock detection circuit includes an audio transducer (2) converting audio signals indicative of engine combustion into output signal voltage including a portion representing background noise and a portion representing detonation. An ac...
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WO/1988/008964A1 |
A detonation detector (10) which can be secured directly or indirectly to an internal combustion engine has an injection moulded housing (30). In order to isolate the seismic mass (19) and the piezoelectric element (16) from parasitic me...
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WO/1988/002108A1 |
In a spark plug (11), the longitudinal bore (12) has an eccentric configuration in the housing (10). In this way a portion of housing is obtained with a thicker wall (20) in which is arranged a sensor (25) determining the movements cause...
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WO/1988/000654A1 |
A device in which knock information of an engine is detected by a knock sensor, knock signal components are selectively produced from the knock information through a frequency filter, a reference voltage of knock detection is made from t...
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WO/1987/005997A1 |
The housing (10) of a pressure sensor (11) contains a shouldered longitudinal through-hole (14) which has, on the end facing the pressure medium, a section (16) with a larger diameter. From this side an insulating part (20) with a printe...
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WO/1987/005998A1 |
In a pressure sensor (11), a blind hole (15) is provided in the housing (10), the base of said hole serving as a pressure diaphragm (16). Located in the blind hole (15) is a measurement element (17) with a spherical cap (35) for uniform ...
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WO/1987/004219A1 |
A system for use with an internal combustion engine which reduces, or eliminates, engine knock and attendant engine damage. An audio transducer (10) is placed on an engine cylinder to convert audio signals occuring within the combustion ...
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WO/1987/001416A1 |
An arrangement for monitoring injection of fuel in an internal combustion engine, especially a compression ignition engine, in which fuel is injected into the or each cylinder via a fuel injector, comprises a polymeric piezoelectric pres...
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WO/1986/006477A1 |
A spark plug (11) in which the longitudinal bore (12) is located eccentrically in the housing (10). This results in a housing section (20) with a thicker wall, in which a pressure sensor (31) is located in a bore (24). The sensor is dire...
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WO/1985/003127A1 |
A diesel fuel injection system (10) having a piezoelectric pressure sensor (12) for generating a reference fuel injection timing signal. The sensor has two piezoelectric pressure transducers (50) mounted in diametrically opposed relation...
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WO/1982/003685A1 |
Method for detecting irregular combustion phenomena in an engine, method wherein a sensor senses a characteristic parameter of the combustions cycle, for example the pressure, the luminosity in the combustion chamber, the noise, etc. The...
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WO/1982/000520A1 |
The sensor for measuring the pressure of a medium comprises a wire (5) the resistance of which varies in accordance with the pressure. The wire (5) is placed within the medium in a coil or pleated form or the like. Preferably a portion (...
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WO/1982/000352A1 |
Analog signal processing circuit (10) for detecting engine knock. A sensor (11) mechanically resonant at characteristic engine knock frequencies provides an analog signal (12) related to engine knock and engine background noise. An envel...
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WO/1981/002630A1 |
A throttle control device for automobiles using internal combustion engines is mounted adjacent the accelerator pedal (21) and is connected to the engine intake vacuum by a hose (19). The vacuum operates a diaphragm (8) in the device to ...
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WO/1981/002323A1 |
Method for generating a reference signal in a knock detector connected to an internal combustion engine (1), the output signal of which represents the degree of knocking in the engine (1). For the purpose of obtaining a simple reference ...
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WO/1981/001613A1 |
A system for sensing and monitoring the injection of fuel into a fuel injection type engine, such as a diesel engine, including a piezoelectric transducer (20, 50, 60) comprising a piezoelectric collar mounted on the fuel line to sense t...
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WO/1981/001171A1 |
Method of avoiding abnormal combustion, so-called knocking, in an internal combustion engine (1, 10) preferably an Otto-type engine, in which engine a transducer (2, 30) is arranged for sensing a parameter dependent on the engine combust...
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WO/1980/002179A1 |
Device which adjusts the combustion of engines during their operations in transitional phases, accelerations, decelerations and changes in the transmission ratios by reduction or suppression of the gas flow through the nozzles of the car...
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JP7460073B2 |
A high pressure hydraulic system comprising:- a hydraulic chamber (34) containing pressurized fluid,- a wall (50) which encloses at least one part of the hydraulic chamber (34) and comprising an integral diaphragm (120),- a piezoelectric...
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JP2024512892A |
Fault detector for detecting the occurrence of sudden pressure increases in electrical devices. The fault detector has a chamber having an interior, a diaphragm in sealing engagement with the chamber, and an opening providing fluid commu...
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JP7429513B2 |
To provide a pressure detection device which allows for suppression of decrease in the accuracy of attachment thereof to a measurement object.The pressure detection device comprises: a diaphragm head 32 provided at the distal end of a pi...
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JP7404963B2 |
To provide a tube type collision detection sensor capable of omitting a useless space while performing quality management.A tube type collision detection sensor includes: a tube part 10 having a hollow part 11; and a pressure sensor part...
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JP2023535141A |
The present invention relates to a pre-chamber spark plug (1) suitable for use in a combustion chamber (12) of an internal combustion engine, said pre-chamber spark plug being adapted in intended use through at least one opening (3) to t...
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JP2023102906A |
To effectively blow away sediments.A sensor adapter 1 has a housing 11 internally formed with a flow path 12 through which gas inside a cylinder flows in communication with the cylinder of an internal combustion engine. The housing has a...
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JP7306921B2 |
To suppress sensitivity variations in pressure in manufacturing a pressure detector including a piezoelectric element.A temporary assembly is formed by assembling a constitution member of a second structure including a diaphragm head 32 ...
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JP2023093099A |
To provide a pressure detector formed by storing a piezoelectric element inserted between electrodes in a housing, the piezoelectric element being prevented from breaking.The pressure detector includes: a piezoelectric element 41 for gen...
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