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JP6902431B2 |
To reduce the ingress of noise into the output of a piezoelectric element.A pressure detection device 20 comprises: a piezoelectric element 33 detecting change of pressure via a diaphragm head 32, etc.; a positive path (second pressurizi...
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JP6893184B2 |
To suppress the surge voltage applied from a signal output side from being conveyed to an input side while maintaining the filtering characteristics of the signal.An output circuit 63 comprises: a resistor 634 for output that is connecte...
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JP2021071331A |
To provide a pressure sensor in which a sensor element is connected to a holding member capable of directly receiving a combustion pressure and which suppresses the occurrence of an output error of the sensor element.In a pressure sensor...
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JP2021060331A |
To provide a cylinder internal pressure sensor capable of preventing a thermal degradation of a sensor element, while securing a detection sensitivity of pressure.A cylinder internal pressure sensor includes: a membrane covering an openi...
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JP6855367B2 |
To provide an in-cylinder pressure sensor that can improve pressure detection accuracy.An in-cylinder pressure sensor comprises: a cylindrical body which extends in an axial direction from the anterior end to the posterior end; a diaphra...
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JP2021050729A |
To prevent the ignition timing from being excessively retarded.A first learned neural network and a second learned neural network are stored. The first learned neural network estimates a value representing the knocking intensity, which i...
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JP2021050728A |
To prevent the ignition timing from being excessively retarded.An ignition timing control device includes multiple bandpass filters (37a-37e) to pass only respective different frequency bands of an output value of a knocking sensor (18),...
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JP6853418B2 |
A pressure transmitter is disclosed. In an embodiment a pressure transmitter includes a housing including a housing wall, a sensor element arranged inside the housing, a ceramic substrate acting as a carrier of the sensor element and of ...
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JP6845764B2 |
To provide a combustion pressure sensor that has a small thermal influence and a high measurement performance.A combustion pressure sensor 5 is attached to an attachment hole 4H communicating with a combustion chamber of an internal comb...
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JP6845731B2 |
To provide a pressure detection device capable of highly accurate pressure measurement by preventing pre-injection due to a fuel gas leak under a cryogenic environment.A pressure detection device comprises a gas seal section which is ins...
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JP6845756B2 |
To suppress overlapping of external noise on an output from a detection element and suppress change in a weight given to the detection element.A pressure detection device 20 includes: a cylindrical end-side housing (first and second end-...
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JP2021025927A |
To provide a pressure sensor capable of accurately detecting pressure under high temperature environment.A pressure sensor comprises a metal diaphragm which is deformable with pressure, a strain gage in which a resistance part is formed ...
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JP6827866B2 |
To achieve reduction in noise in a voltage signal with a falling of sensitivity with respect to a charge signal suppressed, when the charge signal from an output element is integrated by an integration circuit to output the integrated ch...
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JP6825040B2 |
To prevent a diaphragm pressure sensor from being broken due to pressure impact.A diaphragm pressure sensor for capturing a combustion chamber pressure of an internal combustion engine is provided with, on the front side of a sensor hous...
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JP6824011B2 |
A piezoelectric pressure sensor includes a membrane for capturing a force; a piezoelectric transducer having a front face onto which the force is applied from the membrane and generates electric polarization charges; and an electrode tha...
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JP2021009118A |
To provide a cylinder inner pressure sensor that is able to improve the strength of a cap portion.A cylinder inner pressure sensor comprises: a cap portion comprising a cylindrical first part having on an outer peripheral surface thereof...
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JP6817058B2 |
To apply a preload to a plurality of piezoelectric elements in a pressure detector equipped with the plurality of piezoelectric elements while suppressing an increase in device size.A base 314 of a pedestal member 31 arranged on the rear...
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JP6807902B2 |
[Problem] To enhance detection precision even when a pressure wave including transverse wave oscillation is received. [Solution] A pressure sensor 1 is provided with a diaphragm 2, a pressure transmission rod 3 having an element installa...
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JP6806448B2 |
A pressure sensor for measuring pressures in combustion chambers of internal combustion engines includes a sensor housing with a longitudinal axis and an interior space, a measuring element in the interior space, and a rotation-symmetric...
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JP6798874B2 |
To suppress the fluctuation of a preload applied to a plurality of piezoelectric elements attributable to a crack in an insulating member in a pressure detector equipped with a plurality of piezoelectric elements.A first groove 364 to a ...
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JP2020190470A |
To prevent sensitivity of object detection from relying on a distance between a tip part of a blowing port of a fluid such as air and the like and an object, and thereby eliminating a possibility that the object might contact with the ti...
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JP2020183880A |
To provide a pressure sensor in which detection accuracy and detection sensitivity of pressure are improved.A pressure sensor includes a displacement member configured to be displaced in an axial direction, a cylindrical housing includin...
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JP6784158B2 |
To provide a strain detection sensor with which it is easy to improve detection sensitivity.A strain detection sensor 1 includes a pair of input displacement units 2, a plurality of output displacement units 3 and a displacement amount d...
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JP6782115B2 |
A pressure sensor includes an evaluation unit and a sensor assembly, which includes a sensor and an electrode arrangement. The sensor generates signals under the action of a pressure profile, and the electrode arrangement transmits the s...
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JP2020180893A |
To provide a pressure sensor with which it is possible to improve the accuracy of detecting pressure and a glow plug with this pressure sensor.The pressure sensor comprises: a diaphragm including a first tube part for connecting to the r...
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JP6778539B2 |
A piezoelectric pressure sensor includes a sensor housing that accommodates a membrane, a piezoelectric sensor, a charge pick-off and a pre-stressing assembly. The membrane captures a pressure profile, and polarization charges are genera...
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JP6779137B2 |
Provided is a combustion pressure sensor that detects combustion pressure inside a combustion chamber of an internal-combustion engine, said combustion pressure sensor provided with a sensor body that has: a cylindrical housing that can ...
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JP6778537B2 |
A pressure sensor includes a sensor assembly and an evaluation unit. The sensor assembly includes a sensor and an electrode arrangement. The sensor generates signals under the action of a pressure profile, and the electrode arrangement t...
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JP6778538B2 |
A piezoelectric pressure sensor includes a sensor housing enclosing a membrane, a piezoelectric sensor, an electrode arrangement and a pre-stressing body. The membrane captures a pressure profile causing polarization charges generated on...
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JP2020173184A |
To store combustion pressure data in memory even when the storage capacity of a measured data storage unit is small.A combustion pressure measuring device 60 for measuring the combustion pressure of an internal combustion engine 100 comp...
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JP6764770B2 |
To reduce errors of output values that are attributed to thermal expansion of a pressure reception unit receiving pressure.A pressure detection device, which detects combustion pressure in a combustion chamber in an internal combustion, ...
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JP2020159284A |
To enhance piezoelectric detection accuracy, and to improve misfire detection accuracy.A combustion abnormality detection device includes a charge amplifier 210 for outputting a voltage signal in correspondence with an electrical charge ...
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JP2020143671A |
To estimate an output value of a pressure sensor from an output value of a knocking sensor.A knocking detection device includes a knocking sensor (18) for detecting vibration of an engine body (1), and a pressure sensor (19) for detectin...
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JP6752730B2 |
Featured are systems and methods for measuring differential and absolute pressure of a flowing fluid/gas in a fluid system. In such a method the fluid system is configured with first and second pressure taps that are spaced from each so ...
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JP2020122776A |
To provide a cylinder internal pressure sensor capable of suppressing damage and breakage of a joint section joining a heat receiving plate.A cylinder internal pressure sensor includes: a cylindrical casing; a membrane that is joined to ...
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JP6733752B1 |
To estimate an output value of a pressure sensor from an output value of a knocking sensor. A knocking sensor (18) for detecting vibration of an engine body (1) and a pressure sensor (19) for detecting pressure in a combustion chamber (5...
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JP6724704B2 |
To provide a piezoelectric sensor unit capable of simplifying the structure and reducing the number of components while sufficiently securing the load performance and the piezoelectric conversion performance of the piezoelectric sensor, ...
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JP6721445B2 |
To suppress the progression of a gas flowing into a gap between a pressure detector and an object to which the pressure detector is mounted.A pressure detector 20 comprises: a cylindrical first tip-side housing 311; a diaphragm head 32 p...
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JP2020106512A |
To provide an in-cylinder pressure sensor which can be improved in detection accuracy of pressure.The in-cylinder pressure sensor comprises a cylindrical casing extending in an axial direction from a front end side to a rear end side, a ...
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JP2020101160A |
To enhance accuracy of a failure diagnosis of a cylinder internal pressure sensor.An abnormality diagnostic device 100 for a cylinder internal pressure sensor includes a cylinder internal pressure sensor SW6 and a control section (ECU 10...
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JP6716501B2 |
To provide an in-cylinder pressure sensor capable of preventing drop of a heat receiving part.The in-cylinder pressure sensor comprises: a cylindrical housing extending in the axial direction from the front end to the trailing end; a dia...
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JP6714698B2 |
A pressure sensor for an internal combustion engine, which includes: a body containing a pressure-measuring membrane and a device for attaching to the cylinder head of the engine; and an end piece which extends substantially in an axial ...
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JP2020085865A |
To provide a pressure detection device with small sensitivity variations.A pressure detection device 20 includes: a cylindrical housing 21; a diaphragm 22 that has a pressure receiving surface 221 for receiving pressure from the outside ...
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JP6696449B2 |
To provide a pressure sensor having a cantilever structure with which it is possible to detect pressure and the occurrence of abnormal combustion.Provided is the pressure sensor consisting of a sensor chip 40, equipped with a diaphragm 1...
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JP6686673B2 |
A strain sensor is provided which includes a strain sensor, a first housing, a second housing joined to the first housing, and a pressure measuring mechanism firmly retained between the first housing and the second housing. The pressure ...
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JP6681972B2 |
A capacitive pressure sensor for an internal combustion engine is provided having a housing having a bottom surface, variable capacitor and circuitry. The variable capacitor is formed by a stationary electrode and an elastically bendable...
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JP2020056610A |
To provide a pressure detector having small thermal effects.The pressure detector comprises: a pressure detection element 41 for detecting a change of pressure of a pressure medium; a cylindrical housing 311 for accommodating the pressur...
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JP6673777B2 |
To provide a pressure sensor capable of suppressing reduction of a detection accuracy of a pressure even if an elastic member elastically connecting a displacement member and a housing is exposed to a combustion gas.A pressure sensor inc...
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JP6667087B2 |
To provide a valve with a pressure measurement device that can correctly measure a pressure in a cylinder even when the pressure in the cylinder is comparatively high, as causing a function as the valve to retain.A valve, which is provid...
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JP6667722B2 |
A pressure sensor includes: a housing having a tubular shape, and including a front end including an opening; a diaphragm that is disposed to close the opening, and is structured to deform depending on a pressure exerted on a front side ...
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