Knock sensor

Details Knock sensor Knock sensor

1997-12-15

1999-10-12

Williams, Hezron

Measuring and testing

Engine detonation

Specific type of detonation sensor

310321, 73 35, G01L 110

Patent

active

059658045

ABSTRACT:
A knock sensor employs a piezoelectric element and includes a ring-shaped weight which has a chamfered surface portion formed at an inner peripheral edge of the weight. The knock sensor basically comprises a housing which includes a disc-shaped flange portion and a cylinder portion covered with an insulating tube. A lower lead plate, the piezoelectric element, an upper lead plate, an insulating sheet, a weight, a disc spring, and a nut are stacked on the flange portion and disposed around the cylinder portion in the order of mention. The nut is tightly screwed to the external thread portion of the cylinder portion to fixedly sandwich the stacked parts with the flange portion of the housing.

REFERENCES:
patent: 4225802 (1980-09-01), Suzuki et al.
patent: 4379404 (1983-04-01), Hamisch et al.
patent: 4944179 (1990-07-01), Komurasaki
patent: 5635629 (1997-06-01), Imai et al.

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