| 摘要 |
PROBLEM TO BE SOLVED: To decrease the number of valves and simplify control while enabling the hydraulic pressure of a hydraulic servo of a frictional engagement element to be gradually discharged at a time of shifting a reverse range to a range other than the reverse range, and enabling the hydraulic pressure to be promptly discharged at a time of shifting a predetermined gear position to another gear position.SOLUTION: If a reverse range is shifted to a range other than the reverse range and a hydraulic pressure of a hydraulic servo 70 of a second brake B2 is discharged, then a check valve 54 is kept closed by delaying the discharge of a reverse range pressure supplied from an oil path e1 to an oil chamber 54c while a selection lever is located in the reverse range using a second orifice 62, and the hydraulic pressure is discharged while delaying the discharge by a first orifice 61. If the hydraulic pressure of the hydraulic servo 70 of the second brake B2 is discharged at a time of shifting a predetermined gear position to another gear position in a D range, then a hydraulic pressure is applied from a switching valve 51 to open the check valve 54 and discharged via oil passages d1 and d2. |
