| 摘要 |
PROBLEM TO BE SOLVED: To surely disconnect a high-speed clutch even if oil pressure discharge quantity from a pressurizing pump is small immediately before and after starting after switching a manual selector valve 32a to a range R for reversing. SOLUTION: The manual selector valve 32a is provided with an upstream side discharge port 70 communicated with a high-speed clutch oil pressure chamber attached to the high-speed clutch and a downstream side discharge port 71 communicated with an oil reservoir 30. In the condition wherein the manual selector valve 32a is switched to the range R, both the ports 70 and 71 are communicated with each other to discharge the oil pressure inside the high-speed clutch oil chamber to disconnect the high-speed clutch. With this structure, the high-speed clutch is surely disconnected to prevent driving force applying in the travelling direction even in a short time. COPYRIGHT: (C)2005,JPO&NCIPI |
