Idling-engine-speed control method and controller therefor

Details Idling-engine-speed control method and controller therefor Idling-engine-speed control method and controller therefor

1998-11-13

2000-08-29

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Idle speed control

12333924, F02D 4106, F02D 4116

Patent

active

06109238&

ABSTRACT:
An idling-engine-speed control method and apparatus capable of stabilizing an engine speed before completion of warming-up even if cooling water temperatures greatly change compared to the voltage change of water temperature sensor outputs under the transition state in which the cooling-water temperature of an engine changes from a low temperature to a high temperature. A simulated water temperature setting device for generating a simulated cooling water temperature WTm operating so as to keep a holding start water temperature WT.sub.ks when a cooling water temperature WT exceeds the holding start water temperature WT.sub.ks and converge to the cooling water temperature WT in accordance with a predetermined change rate when the cooling water temperature WT exceeds a warming-up completed water temperature WT.sub.ke is used to determine the target engine speed under idling in accordance with the simulated cooling water temperature.

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