| 摘要 |
In order to shorten considerable time lag, which allows racing of an engine and lowers the transmission output torque peak, an accumulator back-up pressure acting on an accumulator for a start-up friction element is increased momentarily to quickly move a servo piston after a manual selector valve has been shifted from N range position to D range, for example, until the friction element is brought into the intial engagement stage. Subsequently, the accumulated back-up pressure is lowered to soften the frictional engagement. |
