Knock sensor

Details Knock sensor Knock sensor

1984-10-25

1987-04-28

Levy, Stewart J.

Measuring and testing

Engine detonation

Combustion signal compared to reference signal varied by a...

310329, G01L 2322

Patent

active

046604103

ABSTRACT:
A knock sensor has a substrate having a projection at the center of one surface thereof and a bore at the center thereof, a vibrating plate having a bore at the center thereof and having a plate rigidifying projection means at the center portion of one surface thereof, the central portion being welded to the projection on the substrate, a piezoelectric ceramic element having a bore in the center thereof and electrodes on opposite faces thereof and secured to the other surface of the vibrating plate, and a terminal having a lead projection extending through the bore in the substrate, the bore in the vibrating plate and the bore in the piezoelectric ceramic element and connected to the electrode on the face of the piezoelectric ceramic element which faces away from the vibrating plate.

REFERENCES:
patent: 3453457 (1969-07-01), Hayer et al.
patent: 4254354 (1981-03-01), Keem
patent: 4371804 (1983-02-01), Peng et al.
patent: 4374472 (1983-02-01), Nishimura
patent: 4473768 (1984-09-01), Kerr et al.
patent: 4497198 (1985-02-01), Takahashi et al.

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