| 摘要 |
PURPOSE: A planetary gear train of an automatic transmission for a vehicle is provided to simplify a hydraulic control system by using six friction members. CONSTITUTION: A planetary gear train of an automatic transmission for a vehicle comprises an input shaft(IS), an output shaft(OS), first and second planetary gear sets(PG1,PG2), a compound planetary gear set(CPG), eight rotation members(TM1-TM8), and six friction members(C1-C4,B1,B2). The input shaft receives rotation power from an engine. The output shaft outputs the rotation power. The first planetary gear set comprises three rotation elements. The second planetary gear set comprises three rotation elements. The compound planetary gear set comprises four rotation members. The rotation members connect two or more rotation members. Each friction member is composed of a clutch and a brake. The clutch is inserted between the selected rotation member and the input shaft. The brake is inserted between the selected rotation member and a transmission housing. [Reference numerals] (AA) Input; (BB) Output
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