Apparatus for controlling the number of idle rotations of an int

Details Apparatus for controlling the number of idle rotations of an int Apparatus for controlling the number of idle rotations of an int

1990-02-09

1990-12-11

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123585, F02M 345, F02M 300, F02D 4116

Patent

active

049762389

ABSTRACT:
An apparatus controls the number of idle rotations of an internal combustion engine for a vehicle so that the number of engine revolutions becomes a target number of idle rotations, the apparatus starting the controlling of the number of idle rotations when each and every one of a plurality of first conditions is satisfied, the first conditions including the opening degree of an air inlet throttle valve of the internal combustion engine, the vehicle speed, and the number of engine revolutions. A control arrangement is provided for starting the controlling of the number of idle rotations so that the number of engine revolutions becomes a target number of idle rotations irrespective of the absence of satisfaction of each of the first conditions, the control arrangement starting the controlling of the number of idle rotations in response to satisfaction of each of the following second conditions: the opening degree of the air inlet throttle valve is an idle opening degree, and the number of engine revolutions drops below a value slightly above the target number of idle rotations after the controlling of the number of idle rotations stops due to the absence of satisfaction of one of the first conditions.

REFERENCES:
patent: 4237833 (1980-12-01), Des Lauriers
patent: 4344399 (1982-08-01), Matsumura et al.
patent: 4402289 (1983-09-01), Ikeura
patent: 4406261 (1983-09-01), Ikeura
patent: 4406262 (1983-09-01), Ikeura
patent: 4506641 (1985-03-01), Hasegawa

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