POWER TRANSMISSION UNIT FOR VEHICLE

摘要

A power transmission unit for a vehicle including a first clutch device that selectively allows a torque transmitting route from an input shaft to an output shaft via a first gear train to transmit torque therethrough, a dog clutch that switches the torque transmitting route from the input shaft to the output shaft between a continuously variable speed change route in which the torque is transmitted through a continuously variable transmission and a reverse route in which the torque is transmitted through a second gear train, and a second clutch device that connects and disconnects both of the continuously variable speed change route and the reverse route to/from at least any one of the input shaft and the output shaft.

主权项

1. A power transmission unit for a vehicle, comprising:
a continuously variable transmission that is adapted to alter a speed ratio continuously, and that is disposed between an input shaft to which a torque of a prime mover is inputted and an output shaft rotated by the torque transmitted from the input shaft; a first gear train that transmits the torque when propelling the vehicle in the forward direction; and a second gear train that transmits the torque to propel the vehicle backwardly by rotating the output shaft in an opposite direction to a rotational direction of the input shaft when propelling the vehicle in the backward direction and that is arranged parallel to the first gear train; a first clutch device that selectively allows a torque transmitting route from the input shaft to the output shaft via the first gear train to transmit the torque therethrough; a dog clutch that switches the torque transmitting route from the input shaft to the output shaft between a continuously variable speed change route in which the torque is transmitted through the continuously variable transmission and a reverse route in which the torque is transmitted through the second gear train; and a second clutch device that connects and disconnects both of the continuously variable speed change route and the reverse route to/from at least any one of the input shaft and the output shaft.