| 摘要 |
PROBLEM TO BE SOLVED: To prevent oscillation of a vehicle in the longitudinal direction and to generate optional creep torque by controlling differential pressure between a first oil chamber and a second oil chamber in accordance with signal pressure at a neutral point. SOLUTION: A hydraulic cylinder 30 is partitioned into upper and lower oil chambers 30A, 30B by a piston 31, and torque transmission force of a power roller 20 is decreased by increasing hydraulic pressure of the oil chamber 30A as a second oil chamber while hydraulic pressure of the oil chamber 30B as a first oil chamber is increased. Consequently, the torque transmission force of the power roller 20 is increased, and the torque transmission force is continuously controlled by adjusting differential pressure of the oil chambers 30A, 30B. The hydraulic cylinder 30 is driven in accordance with hydraulic pressure from a control valve 40 furnished with a spool 41 free to slide in the shaft direction. |
