STEPPED AUTOMATIC TRANSMISSION AND VEHICLE WITH THE SAME

摘要

[Problem] To provide a stepped automatic transmission that allows smooth transmission and high fuel efficiency for the vehicle in which it is used. [Means for Resolution] A transmission 31 includes a centrifugal clutch 55, a first pair of shift gears 86, an hydraulic clutch 66, and a second pair of shift gears 90. The centrifugal clutch 55 includes an input side clutch member 56 that rotates with an input shaft 52 and an output side clutch member 57. The first pair of shift gears 86 includes a first gear 58 that rotates with the output side clutch member 57 and a second gear 63. The hydraulic clutch 66 includes an input side clutch member 67 that rotates according to the rotation of the output side clutch member 57 and an output side clutch member 68. The second pair of shift gears 90 includes a third gear 69 that rotates with the output side clutch member 68, and a fourth gear 76. The second pair of shift gears 90 has a gear ratio smaller than that of the first pair of shift gears 86.