| 摘要 |
A continuously variable transmission for vehicular use including a torque converter, a CVT (continuously variable transmission mechanism), and a rotation transmission mechanism of a variable ratio having at least reverse and forward low speed ranges of large reduction ratios and a forward high speed range of small reduction ratio and which is equipped with a planetary gear mechanism. A torque transmission passage from the output shaft of the torque converter to the output shaft of the vehicular continuously variable transmission is divided into two torque transmission passages through the CVT and to the rotation transmission mechanism of variable ratio so that, in at least one of the speed positions of large reduction ratios, the torque transmission passage through the CVT is disconnected from the output shaft of the vehicular continuously variable transmission so as to not apply a large torque to the CVT in that case, whereas, in the speed position of small reduction ratio, the torque through the CVT and the torque through the rotation transmission mechanism of variable ratio are applied to the output shaft of the vehicular continuously variable transmission. Accordingly, the torque borne by the CVT is reduced so that it does not exceed the engine torque.
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