A throttle valve control device for an automobile engine

摘要

A throttle valve control device for an automotive engine is disclosed which comprises, in addition to an actuator for driving the throttle valve, an electromagnetic clutch for disconnectably connecting the actuator to the throttle valve, and control means for driving the actuator and the electromagnetic clutch, an interrupter circuit which, being inserted between the electromagnetic clutch and the driver circuit thereof, interrupts the supply of the driving current to the electromagnetic clutch when the following two conditions are satisfied simultaneously: (1) the brake of the automobile is operated by the operator, and (2) the automobile is running at a speed not less than a predetermined level, e.g. 5 km/h. Thus, even if failures occur in the fail detector or the clutch driver circuit in the control means, the automobile can be safely decelerated and stopped by the operator who operates the brake pedal. On the other hand, the automobile can be started uphill by the operation of the brake and the acceleration pedal thereof.