| 摘要 |
PROBLEM TO BE SOLVED: To realize smooth gear change in a transmission including a hydraulic infinite variable-speed drive which changes the speed of motivity input from an engine, a main transmission, and a sub-transmission.SOLUTION: A sub-transmission 60 includes a hydraulic clutch and is constituted to change speed by an actuator. The actuator is controlled by a control unit 100, which is connected to travel speed detection means 13. The control unit 100 switches a sub-transmission 60 when a travel speed reaches a set speed in acceleration or deceleration. |
