Multi-function engine sensor

Details Multi-function engine sensor Multi-function engine sensor

1979-11-23

1981-11-10

Ciarlante, Anthony V.

Measuring and testing

Engine detonation

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

73346, 73347, G01N 2520

Patent

active

042991170

ABSTRACT:
A multi-function sensor for internal combustion piston engines is disclosed comprised of a sensor plug extending into an engine cooling system passage adjacent the engine cylinder and providing output signals corresponding to the engine coolant temperature, as well as pressure signals created by combustion within the engine cylinders. The sensor plug comprises a threaded cylinder having an internal open ended bore, closed off with a thin metallic sealing disc on which is bonded a piezoelectric crystal layer detecting acoustical pressure waves transmitted into the water jacket from the engine cylinders upon ignition. A disc of thermistor material is bonded atop the piezoelectric crystal to provide electrical signals corresponding to coolant temperature.

REFERENCES:
patent: 2403774 (1946-07-01), Whitty et al.
patent: 2727389 (1955-12-01), Rose et al.
patent: 3439356 (1969-04-01), Kinzer
patent: 3732728 (1973-05-01), Fitzpatrick
patent: 4033180 (1977-07-01), Massa

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