| 摘要 |
PURPOSE:To make gearshifting between first and second gear speeds controllable even in case of a second gear speed range as well as to make a shift shock relievable, by setting up plural on-off valves in each specified spot, and specifying each of on-off conditions. CONSTITUTION:An on-off valve 22 is set up between a line pressure port 2a of a manual valve 2 and a line pressure port 7a of a second lock valve 7. And, an on-off valve 23 is set up also in a line pressure oil passage connecting a line pressure port 2b of the manual valve 2 to a line pressure port 10a of a throttle backup valve 10. And, the on-off valve 22 is operated with governor pressure and line pressure, performing a changeover of line pressure distribution from the valve 2 to the valve 7 and discharge to a drain. On the other hand, the on-off valve 23 is operated with the governor pressure and low and reverse brake pressure, performing the changeover of the line pressure distribution from the line pressure port 2b to the pine pressure port 10a and the discharge to the drain likewise. |
