| 摘要 |
The multi-speed transmission comprises four planetary gear sets (P1, P2, P3, P4), eight rotatable shafts (1, 2, 3, 4, 5, 6, 7, 8) and six shifting elements (03, 04, 37, 57, 58, 68), whereas the sun gear of the first planetary gear set (P1) is connected to the seventh shaft (7), which is connectable to the third shaft (3) through a first coupling (37), which is connected to the sun gear of the second planetary gear set (P2) and the bar of the third planetary gear set (P3), and is attachable to the housing (G) through a first brake (03), whereas the seventh shaft (7) is also connectable to the fifth shaft (5) through a second coupling (57), which is connected to the ring gear of the third planetary gear set (P3), and is connectable to the eighth shaft (8) connected to the bar of the second planetary gear set (P2) through a third coupling (58), which is, through a fourth coupling (68), connectable to the sixth shaft (6) connected to the sun gear of the third planetary gear set (P3) and the sun gear of the fourth planetary gear set (P4), whereas the input shaft (1) is connected to the bar of the first planetary gear set (P1) and the ring gear of the second planetary gear set (P2) and whereas the fourth shaft (4) connected to the ring gear of the fourth planetary gear set (P4) is attachable to the housing (G) through a second brake (04) and the output shaft (2) is connected to the ring gear of the first planetary gear set (P1) and the bar of the fourth planetary gear set (P4). |
| 主权项 |
1. Multi-speed transmission in planetary design, in particular an automatic transmission for a motor vehicle, comprising an input shaft (1), an output shaft (2) and four planetary gear sets (P1, P2, P3, P4), which are arranged in a housing (G), a total of eight rotatable shafts (1, 2, 3, 4, 5, 6, 7, 8) along with six shifting elements (03, 04, 37, 57, 58, 68), comprising brakes (03, 04) and couplings (37, 57, 58, 68), whose selective intervening brings about different transmission ratio relationships between the input shaft (1) and the output shaft (2), such that at least eleven forward gears and one reverse gear are able to be realized, whereas the sun gear of the first planetary gear set (P1) is connected to the seventh shaft (7), which is detachably connectable to the third shaft (3) through a first coupling (37), which is connected to the sun gear of the second planetary gear set (P2) and the bar of the third planetary gear set (P3), and is attachable to the housing (G) through a first brake (03), whereas the seventh shaft (7) is also detachably connectable to the fifth shaft (5) through a second coupling (57), which is connected to the ring gear of the third planetary gear set (P3), and is detachably connectable to the eighth shaft (8) connected to the bar of the second planetary gear set (P2) through a third coupling (58), which is, through a fourth coupling (68), detachably connectable to the sixth shaft (6) connected to the sun gear of the third planetary gear set (P3) and the sun gear of the fourth planetary gear set (P4), whereas the input shaft (1) is connected to the bar of the first planetary gear set (P1) and the ring gear of the second planetary gear set (P2) and whereas the fourth shaft (4) connected to the ring gear of the fourth planetary gear set (P4) is attachable to the housing (G) through a second brake (04) and the output shaft (2) is connected to the ring gear of the first planetary gear set (P1) and the bar of the fourth planetary gear set (P4). |
