| 摘要 |
PROBLEM TO BE SOLVED: To prevent surge shock of a connecting device for high speed stage in the shifting control in which the connecting device for high speed stage is once connected in selecting from P, N range to D-range. SOLUTION: An oil pressure command value for operating an input clutch for 5-th speed is increased with a fixed gradient from the starting point oil pressure value after pre-charging, and the starting point oil pressure value is lowered when the rotational frequency of an engine is in the low range and oil temperature is high. Thus, even if the completion timing of charging the input clutch with hydraulic oil fluctuates, the difference between the actual value of oil pressure and the oil pressure command value is held down to the minimum so as to prevent the occurrence of surge shock at the completion of charging. Since the gradient of increasing the oil pressure command value is fixed, the difference between the actual value of oil pressure and the oil pressure command value can be prevented from being enleraged. |
