| 摘要 |
A gear train of an automatic transmission for vehicle is provided to increase the efficiency of controlling oil pressure by shifting gears with two friction members. In a gear train of an automatic transmission for vehicle, a first planet gear set(PG1) outputs rotation power which is inputted directly and indirectly through three input paths from an input shaft by combining six rotation elements. A second planet gear set(PG2) is composed of four stepped planet gear set(SPG4) having three actuating elements. The second planet gear set deceleration output to one ration element of the first planet gear set by decelerating the rotation power inputted through the input path from the input shaft. A plurality of friction members is composed of clutches(C1,C2,C3) and brakes(B1,B2,B3).
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