| 摘要 |
PROBLEM TO BE SOLVED: To smoothly perform the switching of a direct connecting mode and a power circulating mode while effectively utilizing a speed change ratio width of a continuously variable transmission, by setting deceleration ratio of a reduction gear to a prescribed relation relating to the speed change ratio width of the continuously variable transmission. SOLUTION: A continuously variable transmission 2 and a reduction gear 3 are respectively connected to a unit input shaft 1, a planet gear mechanism 5, comprising a sun gear 5a, carrier 5b and a ring gear 5c connected to a unit output shaft 7, is connected to an output shaft 4 of this continuously variable transmission 2 and an output shaft 6 of the reduction gear 3. A power circulating mode clutch 8 is interposed from the unit input shaft 1 to the halfway of the reduction gear 3, a direct connecting mode clutch 9 is interposed from the sun gear 5a to the halfway of the unit output shaft 7, and deceleration ratio Ig of the reduction gear 5a is set to Ig=λ<1/2> or Ig<=λ<1/2> relating to a speed change ratio widthλof the continuously variable transmission 2. In this way, the switching of a direct connecting mode and a power circulating mode can be smoothly performed.
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