Pressure-detecting device and method of manufacturing the same

Details Pressure-detecting device and method of manufacturing the same Pressure-detecting device and method of manufacturing the same

2007-03-20

2007-03-20

Allen, Andre J. (Department: 2855)

Measuring and testing

Fluid pressure gauge

Vibration type

C073S704000, C073S035030, C073S035090

Reexamination Certificate

active

11142430

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 fnof the engine and the knocking frequency fnis detected based on the resonance of the pressure-conveying member.

REFERENCES:
patent: 4337643 (1982-07-01), Yamaguchi et al.
patent: 4637245 (1987-01-01), Iwata et al.
patent: 2006/0090544 (2006-05-01), Yorita et al.
patent: A-5-34231 (1993-02-01), None
patent: A-2004-334692 (2004-11-01), None

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