Patent ID: 9587726
Date: 2017-03-07
CPC Classifications: F16H,Y10T

Claim:
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 disposed between the continuously variable speed change route and the reverse route and at least one of the input shaft or the output shaft to selectively connect and disconnect both of the continuously variable speed change route and the reverse route to/from the input shaft or the output shaft so as to allow and interrupt torque transmission therebetween.