Sensor

Details Sensor Sensor

1984-04-10

1985-10-29

Frankfort, Charles

Measuring and testing

Vehicle drive train

Rear end

G01M 1900

Patent

active

045494304

ABSTRACT:
A conductor (5) which varies its resistance value under the influence of pressure is introduced into the combustion chamber of the engine. In one embodiment the conductor is a wire (5), a coil, a meander pattern or the like; preferably, one part (5a) of the wire arrangement is shielded from the pressure. The shielded (5a) and the unshielded (5b) parts of the wire arrangement then form the branches of a bridge circuit. The sensor is preferably disposed in the breathing room (11) of a spark plug or for a Diesel engine, combined with an electric conductor (21, 44) serving to provide pre-glowing in a glow plug. Combustion pressures are thus sensed for controlling and/or regulating injection systems and/or ignition systems without requiring additional bores.

REFERENCES:
patent: 1609688 (1926-12-01), Briggs
patent: 1861021 (1932-05-01), Martin
patent: 1897811 (1933-02-01), Martin
patent: 2163518 (1939-06-01), Postlethwaite
patent: 2879450 (1959-03-01), Baker
patent: 4036050 (1977-07-01), Dooley et al.
patent: 4227403 (1980-10-01), Dooley et al.
patent: 4232545 (1980-11-01), Dobler et al.
patent: 4345555 (1982-08-01), Oshima et al.
patent: 4380973 (1983-04-01), Steinke
Machine Design, Heft 42-"Carbon Resistor Forms Throw-Away Transducer", One Page 147, vol. 42, Nov. 1970.

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