Pressure-detecting device and method of manufacturing the same
First Claim
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1. A pressure-detecting device comprising:
- a sensing unit outputting signals in accordance with pressure, anda pressure-conveying member having one end disposed in the sensing unit and the other end extending into and through an insertion hole of an engine in such a manner that a combustion pressure is conveyed through the pressure-conveying member to the sensing unit for detecting the combustion pressure;
wherein the pressure-conveying member resonates at a knocking frequency of the engine and the knocking frequency is detected based on the resonance of the pressure-conveying member.
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Abstract
One end of a rod-like pressure-conveying member is disposed in a sensing unit, and the other end extends into and through an insertion hole of an engine. A combustion pressure, to which the other end of the rod-like member is exposed, is conveyed to the sensing unit through the pressure-conveying member for the detection of the combustion pressure. The pressure-conveying member resonates at a knocking frequency fn of the engine and the knocking frequency fn is detected based on the resonance of the pressure-conveying member.
28 Citations
4 Claims
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1. A pressure-detecting device comprising:
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a sensing unit outputting signals in accordance with pressure, and a pressure-conveying member having one end disposed in the sensing unit and the other end extending into and through an insertion hole of an engine in such a manner that a combustion pressure is conveyed through the pressure-conveying member to the sensing unit for detecting the combustion pressure; wherein the pressure-conveying member resonates at a knocking frequency of the engine and the knocking frequency is detected based on the resonance of the pressure-conveying member. - View Dependent Claims (2, 3, 4)
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Specification
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Current AssigneeDENSO Corporation
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Original AssigneeDENSO Corporation
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InventorsToyoda, Inao, Oda, Teruo
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Primary Examiner(s)Allen, Andre J.
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Application NumberUS11/142,430Publication NumberTime in Patent Office656 DaysField of Search737/02, 737/04, 73/351.2, 73/350.3, 73/350.9US Class Current73/702CPC Class CodesG01L 19/0645 using isolation membranes, ...G01L 23/18 by resistance strain gaugesG01L 23/221 for detecting or indicating...G01L 9/006 of metallic strain gauges f...
