| 摘要 |
PURPOSE:To easily execute complicated speed change control with the optimum line pressure suitable for a travel condition adjusted by making constitution in which line pressure is controlled with a solenoid valve, and a gear ratio is governed with a speed change control actuator and a gear ratio detection lever. CONSTITUTION:Line pressure is adjusted by providing a constant pressure valve 60 extracting constant pressure with the line pressure adjusted, and a solenoid valve 54 outputting signal pressure with the constant pressure, supplied from the constant pressure valve 60, oil-draingly controlled, and inputting the signal pressure of the solenoid valve 54 in one end side of a regulator valve 50. A speed change control valve 70 has a spool 72 and a port-attached sleeve 71 slidably inserted in the outside of the spool 72, and constitution is made in which the spool 72 is operated in an axis direction with a speed change control actuator 75 and the sleeve 71 is actuated in the axis direction with a gear ratio detection lever 76 interlockingly moving with the axis direction displacement of a driving side or driven side pulley. |
