Method and apparatus for controlling the idling speed of an engi

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

1981-07-27

1984-10-16

Cox, Ronald B.

Internal-combustion engines

Engine speed regulator

Idle speed control

123340, 123585, F02D 1110

Patent

active

044768281

ABSTRACT:
An engine has 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 stepper motor, is arranged in the bypass passage. When the idling speed of the engine is increased beyond a predetermined upper limit of the engine speed, the stepper motor is rotated in a rotating direction wherein the flow area of the flow control valve is reduced. Contrary to this, when the idling speed of the engine is reduced below a predetermined lower limit of the engine speed, the stepper motor is rotated in a direction wherein the flow area of the flow control valve is increased.

REFERENCES:
patent: 3960130 (1976-06-01), Peterson
patent: 3964457 (1976-06-01), Coscia
patent: 4237833 (1980-12-01), Des Lauriers

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