| 摘要 |
A planetary gear train of an automatic may include an input shaft, an output shaft, a first planetary gear set having a first, second and third rotation elements, the first selectively connected to the input shaft, a second planetary gear set having a fourth, fifth and sixth rotation elements, the fourth directly connected to the second rotation element and the fifth directly connected to the input shaft, a compound planetary gear set having seventh, eighth, ninth and tenth rotation elements, the seventh selectively receiving the speed of the input shaft from the fifth, the eighth selectively receiving increased speed from the sixth, the ninth directly connected to the output shaft, and the tenth selectively connected to the input shaft, eight rotation members consisting of at least one of the rotation elements and six friction members.
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