Device of controlling the idling speed of an engine

Details Device of controlling the idling speed of an engine Device of controlling the idling speed of an engine

1982-06-11

1983-07-05

Cox, Ronald B.

Internal-combustion engines

Engine speed regulator

Idle speed control

F02D 1110

Patent

active

043912443

ABSTRACT:
An engine comprising a main intake passage having a throttle valve therein. A bypass passage is branched off from the main intake passage located upstream of the throttle valve and is connected to the main intake passage located downstream of the throttle valve. A flow control valve, actuated by a step motor, is arranged in the bypass passage. When the engine is operating in an idling state, the step motor is rotated at a first speed in a rotating direction wherein the engine speed approaches a desired engine speed. When the ignition switch is turned to the OFF position for stopping the engine, the step motor is rotated at a second speed which is lower than the first speed a little while after the flow control valve fully opens the bypass passage.

REFERENCES:
patent: 3960130 (1976-06-01), Peterson
patent: 4106451 (1978-08-01), Hahori
patent: 4186697 (1980-02-01), Vasuda

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