| 摘要 |
An automatic transmission has eight rotatable shafts (1 to 8), four planetary gear sets (RS1 to RS4), and seven shift elements (B1, B2, B3, C1, C2, C3, C4) for shifting several forward gears and one reverse gear. The first shaft (1) is the drive shaft (AN) of the transmission. A second element (ST3) of the third planetary gear set (RS3) forms the output shaft (AB) of the transmission. As the third shaft (3), a second element (ST1) of the first planetary gear set (RS1) and a third element (HO2) of the second planetary gear set (RS2) are constantly connected to each other. A first element (SO1) of the first planetary gear set (RS1) forms the fourth shaft (4), a third element (HO3) of the third planetary gear set (RS3) forms the fifth shaft (5). As the sixth shaft (6), a third element (HO1) of the first planetary gear set (RS1), a second element (ST2) of the second planetary gear set (RS2) and a first element (SO3) of the third planetary gear set (RS3) are constantly connected. A first element (SO2) of the second planetary gear set (RS2) forms the seventh shaft (7). A first brake (B1) is arranged in the power flow between the third shaft (3) and the housing (GG). A second brake (B2) is arranged in the power flow between the fourth shaft (4) and the housing (GG). A third brake (B3) is arranged in the power flow between the fifth shaft (5) and the housing (GG). A first clutch (C1) is arranged in the power flow between the first and seventh shafts (1, 7). A second clutch (C2) is arranged in the power flow between the first and third shafts (1, 3). A third clutch (C3) is constantly connected to the eighth shaft (8). A fourth clutch is in the power flow between the first and fourth shafts (1, 4). |
