| 摘要 |
An 8th-speed power train of an automatic transmission is provided to improve the transmission feel and reduce transmission time while driving a vehicle by including three pinion oil gear sets. An 8th-speed power train of an automatic transmission includes: a first pinion oil gear sets(SPG1) which is connected to an input shaft(2) and a case(1); a second pinion oil gear set(SPG2) which is connected to the first pinion oil gear set, the case and the input shaft; a third pinion oil gear set(SPG3) which is connected to the first pinion oil gear set, the second pinion oil gear set, the input shaft and an output shaft(3).
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