| 摘要 |
PURPOSE: An automatic transmission for a vehicle is provided to improve power transferring efficiency by reducing the drag torque of the inside of the transmission. CONSTITUTION: A first planetary comprises a first sun gear(S1), a first carrier(C1) and a first ring gear(R1). A second planetary gear device comprises a second sun gear(S2), a second carrier(C2) and a second ring gear(R2). A complex planetary gear device is formed by permanently connecting the first carrier to the second ring gear and permanently connecting the second carrier and the first ring gear. A first rotation element of the complex planetary gear device corresponds to the first sun gear. A second rotation element corresponds to the first carrier and the connecting body of the second ring gear. A third rotation element corresponds to the second carrier and the connecting body of the first ring gear. A fourth rotation element corresponds to the second sun gear. |
