| 摘要 |
A multi-stage transmission having eight forward and one reverse gear including planetary gears, shafts, and shift elements. The sun gear of gearset (P1) couples the third shaft (3) and the ring gear of gearset (P3), and can couple the housing via brake (03). The input shaft couples the carrier of gearset (P1) and can couple, via clutch (15), shaft (5), which couples the sun gear of gearset (P3) and can couple, via clutch (57), shaft (7) that couples the ring gear of gearset (P3). Shaft (6) couples the ring and sun gears of respective gearsets (P1, P2). Shaft (8) couples the carrier and the sun gear of respective gearsets (P3, P4). Shaft (4) couples the carrier of gearset (P4) and can couple, via brake (04), the housing. The output shaft couples the ring gear of gearset (P4) and the carrier of gearset (P2). Clutch (56) detachably connects shafts (5, 6). |
| 主权项 |
1. A multi-stage automatic transmission for a motor vehicle, the transmission comprising:
an input shaft (1) and an output shaft (2); first, second, third and fourth planetary gear sets (P1, P2, P3, P4) being disposed in a housing (G), and each of the first, the second, the third and the fourth planetary gear sets comprising a sun gear, a ring gear and a carrier; at least third, fourth, fifth, sixth, seventh and eighth rotatable shafts (3, 4, 5, 6, 7, 8); at least five shift elements (03, 04, 15, 56, 57) comprising first and second brakes (03, 04) and first, second, third and fourth clutches (15, 56, 57, 58) whose selective engagement results in different transmission ratios between the input shaft (1) and the output shaft (2) so that eight forward gears and one reverse gear are implementable; the third shaft (3) being connected to both the sun gear of the first planetary gear set (P1) and the ring gear of the third planetary gear set (P3), and the third shaft (3) being couplable by the first brake (03) to the housing (G); the input drive shaft (1) being connected to the carrier of the first planetary gear set (P1), the input drive shaft (1) being detachably connectable by the first clutch (15) to the fifth shaft (5), the fifth shaft (5) being connected to the sun gear of the third planetary gear set (P3), the fifth shaft (5) being detachably connectable by the second clutch (57) to the seventh shaft (7), and the seventh shaft (7) being connected to the ring gear of the second planetary gear set (P2); the sixth shaft (6) being is connected to both the ring gear of the first planetary gear set (P1) and the sun gear of the second planetary gear set (P2); the eighth shaft (8) being connected to the carrier of the third planetary gear set (P3) and the sun gear of the fourth planetary gear set (P4), the fourth shaft (4) being connected to the carrier of the fourth planetary gear set (P4) being couplable by the second brake (04) to the housing (G); the output shaft (2) being connected to the ring gear of the fourth planetary gear set (P4) and to the carrier of the second planetary gear set (P2); and the third clutch (56) detachably connecting the fifth shaft (5) to the sixth shaft (6). |
