Speed sensing

Details Speed sensing Speed sensing

1976-02-04

1978-01-03

Rolinec, Rudolph V.

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

123 32EA, 73204, 73506, 324175, G01P 346

Patent

active

040669610

ABSTRACT:
Diesel engine speed is sensed by a thermistor which is disposed within an air inlet of the engine manifold so that the resistance of the thermistor varies in accordance with the temperature of the air within the inlet and thus in accordance with the speed of the engine. The thermistor is connected in a transistor circuit which derives, in response to the change in resistance of the thermistor, an electric signal having a frequency which varies in accordance with engine speed.

REFERENCES:
patent: 2943614 (1960-07-01), Bosch et al.
patent: 3059480 (1962-10-01), Carpenter
patent: 3312966 (1967-04-01), Schaller
patent: 3574475 (1971-04-01), Wolff
patent: 3747577 (1973-07-01), Mauch et al.
patent: 3776208 (1973-12-01), Stumpp
patent: 3796199 (1974-03-01), Knapp
patent: 3797480 (1974-03-01), Williams
patent: 3933039 (1976-01-01), Mayer

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