| 摘要 |
A transmission includes a first simple planetary gear set having first, second, and third elements, the first element of the first gear set receiving rotational mot ion input to the transmission, and a second simple planetary gear set having first, second, a nd third elements, the first element of the second gear set outputting rotational motion from the transmission and the second element of the second gear set being connected to th e third element of the first gear set. The elements of the first gear set include a sun gear, a first carrier, and a first ring gear, and the elements of the second gear set include a second sun gear, a second carrier, and a second ring gear. A first clutch selectively c ouples the second element of the first gear set to the first element of the second gear set . A second clutch selectively couples two elements selected from the group consisting of th e first, second, and third elements of the first gear set and the second element of the s econd gear set. A third clutch selectively couples the first element of the first gear set to the third element of the second gear set. A first brake selectively brakes the secon d element of the second gear set, and a second brake selectively brakes the third element of the second gear set.
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