| 摘要 |
PURPOSE:To prevent the deterioration of a continuously variable transmission due to the abnormal temperature rise of working oil by changing the speed change ratio of the continuously variable transmission to the smaller value side when the working oil temperature is over a prescribed temperature or the cooling water temperature is over a prescribed value. CONSTITUTION:A continuously variable transmission 1 is equipped with a water temperature sensor 21 for detecting the cooling water temperature, oil temperature sensor 22 for detecting the working oil temperature, throttle position sensor 23, engine revolution speed sensor 24, car speed sensor 25, input side pulley revolution speed sensor 26, and an output side pulley revolution speed sensor 27 for detecting the revolution speed of an output side pulley 8. The signal supplied from each sensor is input into an electronic controller 30, and controls a CVT 4 by driving a pressure control valve 13 and a flow rate control valve 14. |
