Idle speed control device and method

Details Idle speed control device and method Idle speed control device and method

1987-08-26

1988-05-31

Cox, Ronald B.

Internal-combustion engines

Engine speed regulator

Idle speed control

36443107, 3644311, F02D 902

Patent

active

047473797

ABSTRACT:
An idle speed control method in which a feedback control for controlling the number of idle revolutions to a predetermined value, a learning control for determining a learning value needed to maintain the number of idle revolutions at the predetermined value, and an opening of the idle speed control valve are carried out. The feedback control is carried out when a predetermined feedback condition is satisfied, the learning control is carried out when a predetermined learning condition is satisfied, and the opening of the idle speed control valve is carried out when the feedback condition is not satisfied. Namely, if the present degree of opening of the idle speed control valve is larger than the learning value, the present degree of opening is maintained, and if the present degree of opening of the idle speed control valve is smaller than the learning value, the degree of opening is increased to the learning value. Also disclosed is a device for carrying out above method.

REFERENCES:
patent: 4344399 (1982-08-01), Matsumura
patent: 4389996 (1983-06-01), Yaegashi
patent: 4545349 (1985-10-01), Ito
patent: 4580535 (1986-04-01), Danno
patent: 4625697 (1986-12-01), Hosaka
patent: 4702210 (1987-10-01), Yasuoka

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