Throttle valve control system and the method therefor

Details Throttle valve control system and the method therefor Throttle valve control system and the method therefor

1991-03-28

1992-02-18

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

123353, F02D 700

Patent

active

050884611

ABSTRACT:
In the throttle valve control system for controlling a throttle valve by an actuator driven on the basis of PWM command signals generated according to accel pedal stroke and feed-backed throttle sensor signals, the throttle sensor signal obtained when the throttle valve is full closed is stored; the throttle sensor signal obtained when a full-close PWM command signal is applied to the actuator is detected; the full-close PWM command signal is corrected so that the stored throttle sensor signal matches the detected throttle sensor signal; and PWM command signals are generated on the basis of the corrected full-close PWM command signal. Therefore, it is possible to obtain a full-close PWM command signal whose pulse width accurately matches the actual throttle valve full-close position, irrespective of error or offset due to dispersion of the throttle sensor characteristic or A-D conversion characteristic of the control system.

REFERENCES:
patent: 3722614 (1973-03-01), Sakakibara et al.
patent: 4245599 (1981-01-01), Des Lauriers
patent: 4297978 (1981-11-01), Matsui
patent: 4359124 (1982-11-01), Ninoyu et al.
patent: 4389990 (1983-06-01), Murray
patent: 4953530 (1990-09-01), Manaka et al.
patent: 4969431 (1990-11-01), Wataya

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