| 摘要 |
PROBLEM TO BE SOLVED: To prevent double engagement of a transmission even if a spool has become immovable by impeding supply of oil pressure enable engaging with a new engaging element. SOLUTION: By a spool S of a first valve device 22 being moved to a position where it should be moved to by signal oil pressure P3, P1 supplied to the first valve device 22, the signal oil pressure P3 is supplied to an engaging element B1 and the signal oil pressure P1 is supplied also to a second valve device 23, and when the spool S of the first valve device 22 does not move by the signal oil pressure P1, P3, it is made a switchover means composed of the first and second valve devices 22, 23 discharging the signal oil pressure P1, P3. |
