| 摘要 |
A transmission system having a first clutch for receiving engine drive, a second clutch disposed downstream of the first clutch with respect to a direction of drive transmission, change speed gearing disused between the first clutch and second clutch, a first transmission shaft for transmitting drive from the first clutch to the change speed gearing, a second transmission shaft for transmitting drive in varied speeds from the change speed gearing to the second clutch, a third transmission shaft for transmitting drive from the second clutch to drive wheels, and a third clutch for transmitting drive at a low speed to the first transmission shaft. The first clutch and second clutch are disengageable upon start of a shifting operation of the change speed gearing, and re-engageable upon completion of the shifting operation. To obtain matching between rotating rates of an input line and an output line of the change speed gearing, the third clutch transmits the low speed drive to the first transmission shaft upon disengagement of the first clutch and second clutch, and breaks the drive upon completion of the shifting operation of the change speed gearing. |
