| 摘要 |
<p>PURPOSE: A gear train of an auto transmission for vehicles is provided to form frontward 9 speeds and backward 1 speed by mixing three simple planetary gear sets by using fourth clutches and three brakes. CONSTITUTION: A first planetary gear set(PG1) is composed of a first sun gear(S1), a first planetary carrier(PC1), and a first ring gear(R1). A second planet gear set(PG2) is composed of a second sun gear(S2), a second planet carrier(PC2), and a second ring gear(R2). A third planetary gear set(PG3) is composed of a third sun gear(S3), a third planetary carrier(PC3), and a third ring gear(R3). A plurality of clutches(C1-C4) selectively and variably interlinks each rotation element of the first, second, and third planetary gear sets. A friction member is comprises of a plurality of brakes(B1-B3) which are variably connected with transmission housing(H).</p> |
