Idling speed controlling system for an internal combustion engin

Details Idling speed controlling system for an internal combustion engin Idling speed controlling system for an internal combustion engin

1981-03-26

1983-03-01

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123585, F02D 902

Patent

active

043752080

ABSTRACT:
A system for controlling the idling engine speed (output) of an internal combustion engine (controlled device) in an automotive vehicle in either open-loop or feedback control mode is disclosed. In the open-loop control mode, the control operation is based on the cooling water temperature of the engine, in the feedback control mode, the control operation being based on the deviation of an actual engine speed from the reference (input) engine speed. In some conventional systems, there is provided a time delay between the transfer of control from open-loop control to feedback control. However, according to the present invention there is provided a means for supplying instantaneously an additional intake air flow quantity to the engine in addition to the intake air quantity required in the feedback control mode at the instant when the control mode is transferred from the open-loop to feedback control. Consequently, the engine speed gradually settles at the reference engine speed without unfavorable hunting and overshooting so that an engine stalling due to lowered reference engine speed can be prevented.

REFERENCES:
patent: 4291656 (1981-09-01), Miyagi et al.
patent: 4305360 (1981-12-01), Meyer et al.

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