| 摘要 |
PURPOSE:To maintain the proper idle rotation even at the fault of the control valve, by providing means for correcting the anbormality of the pressure in the pressure operating chamber of an actuator for driving the control valve of the suction air to the engine. CONSTITUTION:The solenoid valves 11, 12 are arranged in the atmospheric conduit 9 and the negative pressure conduit 10 conducting to the pressure operating chamber 7 of an actuator 5 for driving the throttle valve 3 of a suction pipe section 2, to control the valves 11, 12 by means of a computer 13 for receiving each information D1-D4 from an idle detector 14, water temperature sensor 15, air condutioner drive switch 16 and an engine rotation detector 17. Furthermore a correction conduit 21 conducting to the atmosphere is provided in the operating chamber 7 independently from the conduit 9 and a solenoid valve 22 is arranged, while a pressure detector 23 is provided on the actuator 5 and its information is provided to the computer 13. When the abnormality is detected from the information D5, the valve 22 is opened to conduct the operating chamber 7 to the atmosphere thus to correct the valve 3. |
