Apparatus and method for engine idle speed control

Details Apparatus and method for engine idle speed control Apparatus and method for engine idle speed control

1988-02-29

1989-01-03

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Idle speed control

290 40R, F02D 4116

Patent

active

047948981

ABSTRACT:
In a battery charging system for an automobile, the conduction rate of a switching circuit which controls field current of the generator is detected, while engine speed is also detected. Since the conduction rate represents the actual amount of electricity generated by the generator, the conduction rate as well as engine speed is used to determine optimal engine idle speed. To this end desired conduction rate values for various engine speeds within idle speed range are prestored in a memory, and a desired conduction rate is read out using detected engine speed so that a detected conduction rate will be compared with the desired conduction rate. Using the result of comparisonn, idle speed is either increased or decreased so that the actual conduction rate approaches the desired conduction rate. In one embodiment, the generator is disabled when the actual conduction rate is greater than the desired conduction rate in order to prevent engine stall.

REFERENCES:
patent: 2804552 (1957-08-01), McFarland
patent: 2809300 (1957-10-01), McFarland
patent: 4510903 (1985-04-01), Sakakiyama
patent: 4553516 (1985-11-01), Hasegawa

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