| 摘要 |
PURPOSE: The gear train of an auto transmission for vehicles is provided to control the operation of three friction members in each change gear step by mixing four simple planetary gear sets with four clutches and two brakes. CONSTITUTION: A clutch means comprises first, second, third, and fourth planetary gear sets(PG1-PG4) and four clutches(C1-C4). A break means comprises two brakes(B1,B2). The first planetary gear set is arranged in an engine. The second, third, and fourth planetary gear sets are successively arranged. An input shaft(IS) forms the turbine shaft of a torque converter. One operation element of the first planetary gear set is connected to one operation element of a second planetary gear set through a first power transfer member. The other operation element of the second planetary gear set is connected to one operation element of a third planetary gear set through a second power transfer member. The other operation element of the third planetary gear set is connected to one operation element of a fourth planetary gear set through a third power transfer member. |
