Piezoelectric engine-knock sensor

Details Piezoelectric engine-knock sensor Piezoelectric engine-knock sensor

1981-02-23

1983-04-12

Gill, James J.

Measuring and testing

Engine detonation

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

73651, 310329, G01L 2322

Patent

active

043794041

ABSTRACT:
A metallic reed clamped against a piezoelectric element, and free to oscillate at its other end, generates electrical signals in a piezoelectric element which is held between clamp surfaces in fixed relation to an engine part which transmits engine knock vibrations to the sensor assembly. The reed is oriented perpendicular to the vibratory motions of the engine part on which it is mounted, so that vibrations of the reed will be excited thereby, and these will deform the piezoelectric element to generate signals. The entire assembly can be enclosed in a transverse bore in the head of a cylinder head screw.

REFERENCES:
patent: 2722614 (1955-11-01), Fryklund
patent: 3336529 (1967-08-01), Tygart
patent: 4305013 (1981-12-01), Baier et al.

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