| 摘要 |
PROBLEM TO BE SOLVED: To prevent a clutch 7 for low speed from being unnecessarily disengaged due to the displacement of the spool 35a of a selector valve 25 for a high-speed clutch when the mode is changed between a low-speed mode and a high-speed mode. SOLUTION: A source oil pressure introduction port 36 is not allowed to communicate with a drain port 37 regardless of the axial position of a spool 35a. For this purpose, the distance V between the end surfaces of the source oil pressure introduction port 36 and the drain port 37 is made larger than the distance W between the lands 45a, 45b of the spool 35a (V>W). COPYRIGHT: (C)2008,JPO&INPIT |
