| 摘要 |
CONSTITUTION:To set the throttle actuator position in optimum after running and prevent an abnormal increase or drop of engine revolutions by varying the throttle actuator return speed during the warming up in response to the engine temperature just before running. CONSTITUTION:A throttle valve aperture control device detects the number of engine revolutions and the temperature of the engine cooling water by means of a water temperature sensor 9 and a revolution sensor 10 incorporating a distributor, and controls a throttle valve with a motor driven throttle actuator 7 so as to obtain the number of revolutions corresponding to the temperature. An idle detection switch IDSW20 to detect manually whether the throttle valve is opened or not is incorporated into the actuator 7. The cooling water temperature Tw, number of revolutions N, switches IDSW, STSW, THSW, NSW, and intake negative pressure Vc are fed as input signals to a control module 12 composed of an arithmetic processing unit MPU, memory unit ROM, input/outputs LSI, multiplexer MPX, and analog digital converter AD. |
