| 摘要 |
PURPOSE:To speed up the rise of the operating oil temperature and reduce a power loss at the time of starting by stopping flowing of an operating oil into an oil cooler when the temperature of the operating oil of an automatic speed change gear is below a setpoint. CONSTITUTION:Operating oil is sucked up from an oil reservoir 1 by an oil pump 2 and discharged to an oil path 11 so as to be fed to an escape valve 51, the second escape valve 52, a direct-coupled clutch control device 6 and a torque coverter 3. An oil temperature sensor 81 is mounted in an oil flowing path 13 to an oil cooler 4, and when the temperatue of the operating oil is lower than a setpoint, a solenoid valve 83 is operated to flow the operating oil into the oil reservoir 1 through an oil path 16. |
