Valve control apparatus for an automobile

Details Valve control apparatus for an automobile Valve control apparatus for an automobile

1996-03-06

1998-10-06

Sircus, Brian

Electricity: motive power systems

Switched reluctance motor commutation control

318439, 318489, 318599, H02K 2300

Patent

active

058181784

ABSTRACT:
In a valve control apparatus for an automobile, an H-bridge type chopper main circuit 4 is operated by a control signal PWM from a microcomputer 1 to thereby drive a motor 9 for controlling a throttle valve 10. The power element current from the chopper main circuit 4 is detected by a shunt resistor 5 in the form of a voltage, and the detected voltage is amplified by an amplifier 6 and then taken into the microcomputer 1 through a sample hold circuit 12 and an A/D converter. The sample hold circuit 12 is operated in synchronism with the control signal PWM from the microcomputer 1. Further, the A/D converter is also operated in synchronism with the control signal PWM from the microcomputer 1. The motor 9 is controlled by a throttle valve opening angle command and a throttle valve opening angle signal, and further the motor 9 is controlled by a detected motor current.

REFERENCES:
patent: 5157956 (1992-10-01), Isaji et al.
patent: 5202813 (1993-04-01), Uota et al.
patent: 5231344 (1993-07-01), Marumoto et al.
patent: 5581452 (1996-12-01), Yamamoto

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