Engine idling speed control signal generator

Details Engine idling speed control signal generator Engine idling speed control signal generator

1978-07-13

1980-03-04

Myracle, Jerry W.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

123102, G01K 1300

Patent

active

041910516

ABSTRACT:
The idle speed of an engine is controlled in response to a control signal derived from the voltage across a thermistor responsive to the temperature of the engine cooling water. The thermistor voltage level varies exponentially with temperature changes. An engine idle speed control signal generator circuit includes a network of resistors, diodes and a transistor which produces an output control signal whose maximum level is limited to a value corresponding to a desired maximum idle speed, and whose minimum level is maintained above a value corresponding to the minimum desired idling speed. The circuit also adjusts the level of the output control signal to compensate for varying engine loads and faults in the circuit.

REFERENCES:
patent: 2965091 (1960-12-01), Munyan
patent: 3964457 (1976-06-01), Coscia

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