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Title:
IDLE CONTROLLER OF ENGINE
Document Type and Number:
Japanese Patent JPS60111037
Kind Code:
A
Abstract:

PURPOSE: To quickly concentrate an idling speed to a desired speed when an external load is activated, by performing control of the idling speed with an air fuel ratio fixed to a point of rich mixture during the recovery period to the desired revolution speed when the external load is activated.

CONSTITUTION: When idling speed control is shifted to feedback control, a desired revolution speed is set according to an engine temperature and a load switch to extract a difference RPM between the desired revolution speed and an actual revolution speed. When an external load is activated, anticipated compensation of the quantity of air sucked is performed and it is discriminated whether the difference ΔRPM of a revolution number is within a safety range indicated by +-β or not. If the difference is out of the safety range the air fuel ratio is fixed to the rich level and feedback control of the air fuel ratio is interrupted. As aforementioned, the feedback control of air fuel ratio is interrupted with air fuel mixture rich in case the difference between revolution numbers is great, the air fuel ratio is restrained from getting lean in company with an anticipated increase of intake air when an external load is thrown and temporary drop in revolution number due to lack of output may be prevented.


Inventors:
Nishimori, Takayoshi
Kawazoe, Satoru
Application Number:
JP1983000218519
Publication Date:
June 17, 1985
Filing Date:
November 18, 1983
Export Citation:
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Assignee:
MAZDA MOTOR CORP
International Classes:
F02D41/14; F02D41/00; F02D41/08; F02D41/16; (IPC1-7): F02D41/14; F02D41/16
Domestic Patent References:
JP57123951B
JPS54159526A
JPS5669438A