Engine rotation speed control system

Details Engine rotation speed control system Engine rotation speed control system

1983-01-20

1984-06-26

Cuchlinski, Jr., William A.

Internal-combustion engines

Engine speed regulator

Idle speed control

123340, 123361, 123376, F02M 300

Patent

active

044559780

ABSTRACT:
An engine rotation speed control system which comprises an actuator for prescribing the recovery position of a throttle valve, a recovery position sensor for detecting that the throttle valve is returned to the recovery position, an idle speed control unit for controlling the engine to a predetermined idling speed, and a negative pressure restricting unit for controlling the throttle actuator such that reduction in intake negative pressure to below a predetermined negative pressure is prevented. When the throttle valve returns to the recovery position with the engine speed in excess of an upper limit of the idling speed, the actuator is controlled by the negative pressure restricting unit. When the engine speed falls below the upper limit, the idle speed control unit is actuated. Upon engine starting, the actuator is set such that the opening degree of the throttle valve suitable for the engine starting is obtained before the starter starts operating.

REFERENCES:
patent: 3525017 (1970-08-01), Rosenberg et al.
patent: 3964457 (1976-06-01), Coscia
patent: 4212272 (1980-07-01), Hawk
patent: 4242994 (1981-01-01), Keely
patent: 4245599 (1981-01-01), Des Lauriers
patent: 4291656 (1981-09-01), Miyagi et al.

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