Method and apparatus for controlling the solenoid current of a s

Details Method and apparatus for controlling the solenoid current of a s Method and apparatus for controlling the solenoid current of a s

1986-10-20

1988-05-24

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123353, 123361, 123585, F02D 4116

Patent

active

047458992

ABSTRACT:
A method and apparatus are provided for controlling the solenoid current of a solenoid valve which controls the amount of suction air in an internal combustion engine. The actual solenoid current flowing through the solenoid is detected and a solenoid current control valve is calculated as a function of engine operating conditions. A corrected solenoid current control value is determined as a function of the solenoid current control value and a pulse duration signal is determined as a function of the corrected solenoid current control value. A feedback control term is calculated as a function of the actual solenoid current and the corrected solenoid current control value. Further, a temperature corresponding to the solenoid temperature is detected and a temperature correction value is generated corresponding thereto. A pulse duration output signal is calculated for controlling the operation of said solenoid as a function of the pulse duration signal, the feedback control term, and the temperature compensation value.

REFERENCES:
patent: 4134373 (1979-01-01), Kibler et al.
patent: 4378766 (1983-04-01), Yamazoe et al.
patent: 4446410 (1984-05-01), Yagura et al.
patent: 4580536 (1986-04-01), Takao et al.
patent: 4638784 (1987-01-01), Ikeda
Patent Abstracts of Japan, vol. 9, No. 142, Jun. 18, 1985; (JP-A-60-22050).

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