| 摘要 |
PURPOSE:To reduce the deviation of control due to the fluctuation of suction vacuum by a method wherein a revolution speed control means is driven and controlled by the output pressure of a pressure control valve controlled in accordance with the operating condition of the engine through an actuator. CONSTITUTION:The operating rod of the vacuum actuator 4 is connected to the throttle valve 2 of a carburettor 1 in a form not bothering valve opening operation effected by an accelerating pedal while the vacuum port of the actuator is connected to the third port 14 of the pressure control valve 10. The pressure control valve 10 is provided with first and second ports 12, 13, on which an atmospheric pressure and a suction vacuum are imposed respectively, and capable of controlling the vacuum pressure by the source pressures of the atmospheric pressure and the suction vacuum in accordance with the energizing force of an exciting coil controlled by a computer 5. The computer 5 controls the exciting coil by an engine revolution synchronizing pulse, the ON signal of an airconditioning switch or the like in accordance with the output of a water temperature sensor 6 upon starting the engine. |
