System and method for controlling engine idling speed applicable

Details System and method for controlling engine idling speed applicable System and method for controlling engine idling speed applicable

1991-07-17

1992-06-16

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Idle speed control

F02D 4116

Patent

active

051217252

ABSTRACT:
In a method and system for controlling an engine idling speed applicable to an internal combustion engine, a pulse duty ratio of a pulse signal supplied to an engine idling control valve is set by adding a basic control value, a proportional constant, and integration constant. The integration constant, set according to a difference between a target engine idling speed and an actual engine revolution speed, is modified as follows; during normal engine idling, the integration constant is set according to which one of the compared values of the target engine idling speed and actual engine revolution speed is greater. However, when an external load is applied to the engine, the integration constant is set by a quantity corresponding to the proportional constant.

REFERENCES:
patent: 4491108 (1985-01-01), Hasegawa et al.
patent: 4562808 (1986-01-01), Tominaga et al.
patent: 4862851 (1989-09-01), Washino et al.
patent: 4883034 (1989-11-01), Yashiki et al.

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