| 摘要 |
A multistage transmission with eight forward and one reverse gear, including an input and output shafts, planetary gearsets, gear stages, shift elements and shafts. The input shaft couples the carrier of gearset (P1) and, via clutch (15), can couple shaft (5) that couples the sun gear of gearset (P3) and, via clutch (58), can couple shaft (8) connected to the ring gear of gearset (P2). The ring gear of gearset (P1) couples shaft (6) connected to the sun gear of gearset (P2). Shaft (3) couples the sun and ring gears of respective gearsets (P1, P3) and can couple, via brake (03), the housing. The carrier of gearset (P2) couples shaft (4) gear stage (S1) which couples the output shaft. The carrier of gearset (P3) couples shaft (7) gear stage (S2) which couples the output shaft. Clutch (56) can couple shafts (5, 6). |
| 主权项 |
1. A multi-stage automatic transmission for a motor vehicle, the transmission comprising:
an input first shaft (1) and an output second shaft (2) first, second and third planetary gear sets (P1, P2, P3), and each of the first, the second and the third planetary gear sets comprising a sun gear, a ring gear and a carrier; first and second spur gear stages (S1, S2) being connected to a countershaft, which is disposed parallel to a longitudinal axis of the first, the second and the third planetary gear sets (P1, P2, P3) and serving as the output second shaft (2) of the transmission, the first and second spur gear stages (S1, S2) being disposed inside a housing (G) of the transmission, at least third, fourth, fifth, sixth, seventh, eight and ninth rotatable shafts (3, 4, 5, 6, 7, 8, 9); at least five shift elements (03, 15, 39, 56, 58) comprising a brake (03) and first, second, third and fourth clutches (15, 39, 56, 58) whose selective engagement results in different transmission ratios between the input first shaft (1) and the output second shaft (2) so that eight forward gears and one reverse gear are implementable; the input first shaft (1) being connected to the carrier the first planetary gear set (P1), the input first shaft (1), by engagement of the first clutch (15), being releasably connected to the fifth shaft (5) that is connected to the sun gear of the third planetary gear set (P3), and the fifth shaft (5), by engagement of the second clutch (58), being releasably connectable to the eighth shaft (8) that is connected to the ring gear of the second planetary gear set (P2), the sixth shaft (6) being 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 third shaft (3) being connected to the sun gear of the first planetary gear set (P1), the third shaft (3) being releasably connectable, via engagement of the third clutch (39), to the ninth shaft (9) which is connected to the ring gear of the third planetary gear set (P3), and the third shaft (3) being connectable, via engagement of the brake (03), to the housing (G); the carrier of the second planetary gear set (P2) being connected to the fourth shaft (4) which is connected to a first spur gear (ST1) of the first spur gear stage (S1), and a second spur gear (ST2) of the first spur gear stage (S1) being connected to the output second shaft (2); the carrier of the third planetary gear set (P3) being connected to the seventh shaft (7) which is connected to a first spur gear (ST3) of the second spur gear stage (S2), and a second spur gear (ST4) of the second spur gear stage (S2) being connected to the output second shaft (2), and the fourth clutch (56) releasably connecting the fifth shaft (5) to the sixth shaft (6). |
