Knocking detection device

Details Knocking detection device Knocking detection device

1982-04-13

1984-04-03

Gill, James J.

Measuring and testing

Engine detonation

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

73714, 92103M, G01L 2322

Patent

active

044400144

ABSTRACT:
An engine knocking detection device has a diaphragm to be disposed in contact with the engine cooling water so as to resonate with pulsations of the pressure of the cooling water caused by engine knockings, and output elements responsive to the vibration of the diaphragm to produce an electrical output signal to be utilized for the control of engine spark timing. The water-contacting surface of the diaphragm is coated with a layer of a hydrophilic material operative to prevent attachment or adhesion of air bubbles to the water-contacting surface of the diaphragm whereby the sensitivity of the diaphragm to the water pressure pulsation is improved.

REFERENCES:
patent: 2230273 (1941-02-01), Smith
patent: 4299117 (1981-11-01), Andrews et al.

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