| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of vibration in a driving system at its correction releasing time, and also secure respective controllability at starting clutch engaging time and antiskid control time when temporarily and increasingly correcting line pressures to sandwich a pulley so that a belt does not slip. SOLUTION: After respective preset line pressures set according to various conditions of a vehicle are increasingly corrected to a prescribed value up to prescribed time or a prescribed condition, they are respectively and gently reduced by a gentle pressure reduction step quantityΔPL set small as the change gear ratio is large, generation of vibration is restrained by restraining a sudden change in friction between a belt and a pulley. When operating fluid pressure to a starting clutch is quickly increased by increasing the line pressures or at antiskid control time, respective controllability is secured by avoiding vibration of the clutch by cancelling this gentle pressure reduction, or by quickening a return to a speed increase in a driving wheel speed. |
