| 摘要 |
A multistage transmission with eight forward and one reverse gear, including 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) which couples, via clutch (59), shaft (9) which couples the sun gear of gearset (P3) and, via clutch (58), can couple shaft (8) and 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 (G). The carrier of gearset (P2) couples shaft (4), gear stage (S1) and the output shaft. The carrier of gearset (P3) couples shaft (7), gear stage (S2) and the output shaft. The clutch (56) couples shafts (5, 6) to block gearset (P2). |
| 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 and third planetary gear sets (P1, P2, P3), 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 shaft (2) of the transmission, and the first and second spur gear stages (S1, S2) disposed inside a housing (G), at least third, fourth, fifth, sixth, seventh, eighth, and ninth rotatable shafts (3, 4, 5, 6, 7, 8, 9); at least five shift elements (03, 15, 56, 58, 59,) comprising a brake (03) and first, second, third and fourth clutches (15, 58, 59, 56) 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 input drive shaft (1) is connected to the carrier of the first planetary gear set (P1) and, by engagement of the first clutch (15), the input drive shaft (1) being releasably connected to the fifth shaft (5), the fifth shaft, by engagement of the third clutch (59), being connected to the ninth shaft (9) which 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) which is connected to the ring gear of the second planetary gear set (P2); the ring gear of the first planetary gear set (P1) being connected to the sixth shaft (6) which also connected to the sun gear of the second planetary gear set (P2); the third shaft (3) is connected to 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) is connectable, via engagement of the brake (03), to the housing (G) of the transmission; 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 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) the second spur gear stage (S2) being connected to the output shaft (2); and the fourth clutch (56) releasably connecting the fifth shaft (5) to the sixth shaft (6) such that, when the fourth clutch (56) and the second clutch (58) are engaged, the second planetary gear set (P2) is blocked by the coupling of the sun gear of the second planetary gear (P2) set to the ring gear of the second planetary gear set (P2). |
