| 摘要 |
A continuously variable transmission includes a belt type continuously variable transmission device A and a forward and reverse movement change-over device 4 having a planetary gear mechanism 40, a reverse rotation brake 50 and a direct coupled clutch 60, and that selectively fastens the reverse rotation brake and the direct coupled clutch to perform forward and reverse movement change-over. An operating piston 62 of the direct coupled clutch is arranged in a stationary cylinder fixed to a transmission case so that an axial pressure of the operating piston of the direct coupled clutch is transmitted to the transmission case 5a via a bearing 16 that rotatably supports a pulley shaft 10 of the continuously variable transmission device. A hydraulic pressure adjustment unit SLU 72 for controlling a supply pressure to the direct coupled clutch 60 to a minimum hydraulic pressure that does not cause any slip in the direct coupled clutch in accordance with a change of input torque is provided.
|
