Pressure-detecting device and method of manufacturing the same
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United States of America Patent
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Mar 20, 2007
Grant Date -
Dec 15, 2005
app pub date -
Jun 2, 2005
filing date -
Jun 11, 2004
priority date (Note) -
In Force
status (Latency Note)
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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 f.sub.n of the engine and the knocking frequency f.sub.n is detected based on the resonance of the pressure-conveying member.
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