| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure capable of preventing occurrence of any gross slip at a traction part when an engine is started/stopped even if any pre-load spring having a large elasticity is not used, by rapidly raising the hydraulic pressure in a hydraulic chamber of a pressing device when the engine is started, and gradually dropping the hydraulic pressure in the hydraulic chamber when the engine is stopped. <P>SOLUTION: When the engine is started from a stop state, the control value of a hydraulic pressure to be introduced in a hydraulic chamber of a pressing device via a hydraulic pressure regulating valve for the pressing device is set to the maximum value. Thus, pressurized oil can be smoothly fed into the hydraulic chamber. Further, while executing the operation of stopping the engine, the opening of the hydraulic pressure regulating valve for the pressing device is regulated to an opening for regulating a hydraulic pressure to be introduced into the hydraulic chamber, i.e. a surface pressure at each traction part, to the necessary minimum value. Thus, pressurized oil is gradually and gently discharged from the hydraulic chamber. <P>COPYRIGHT: (C)2012,JPO&INPIT |
