Method of and apparatus for controlling the idling speed of an e

Details Method of and apparatus for controlling the idling speed of an e Method of and apparatus for controlling the idling speed of an e

1981-07-24

1983-04-05

Cox, Ronald B.

Internal-combustion engines

Engine speed regulator

Idle speed control

123179L, 123586, 123340, F02D 1110, F02M 1700

Patent

active

043787681

ABSTRACT:
An engine includes a main intake passage having a throttle valve therein. A bypass passage branches off from the main intake passage upstream of the throttle valve and connects again to the main intake passage downstream of the throttle valve. A flow control valve, actuated by a step motor, is arranged in the bypass passage. When the speed difference between the desired idling speed and the actual idling speed is higher than 20 r.p.m., the step motor is rotated in a direction wherein the actual idling speed approaches the desired speed. Contrary to this, when the above-mentioned speed difference is lower than 20 r.p.m., the step motor remains stationary.

REFERENCES:
patent: 3964457 (1976-06-01), Coscia
patent: 4072137 (1978-02-01), Hattori
patent: 4203395 (1980-05-01), Cromas
patent: 4237833 (1980-12-01), Des Lauriers

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