| 摘要 |
An automatic transmission comprising a housing (12); a planetary gear train (14) mounted within the housing; an input drive shaft (16) for providing input drive to the planetary gear train; an output drive shaft (18) connected with an output drive from the planetary gear train; a first clutch (C1) connected between the input drive shaft and a first drive input (22) to the planetary gear train; a second clutch (C2) connected between a first reaction input (28) to the planetary gear train and the housing; a third clutch (C3) connected between a second reaction input (30) to the planetary gear train and the housing; a fourth clutch (C4) connected between a third reaction input (32) to the planetary gear train and the housing; and a fifth clutch (C5) connected between a second drive input (24) to the planetary gear train and the input drive shaft; wherein for first forward gear ratio the first and second clutches are engaged; for second forward gear ratio the first, second and third clutches are engaged; for third forward gear ratio the first, second, third and fourth clutches are engaged; and for fourth forward gear ratio the first, second, third, fourth and fifth clutches are engaged. Allows gear shift by the operation of a single clutch.
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