| 摘要 |
Nine-speed multi-stage transmission with four planetary gear sets, rotatable shafts and six shift elements. Sun of first set is connected to fifth shaft which is couplable, via third brake, to housing and is connectable, via first clutch, to drive shaft which is connectable, via second clutch, to seventh shaft which is connected to ring of third set and carrier of second set. Drive shaft is connectable to eighth shaft, via third clutch, connected to carrier of first set and sun of second set. Sixth shaft is connected to ring of second set and carrier of fourth set. Fourth shaft is connected to ring of first set and sun of fourth set and is couplable, via second brake, to housing. Third shaft is connected to sun of third set and is couplable, via first brake, to housing. Output shaft is connected to carrier of third set and ring of fourth set. |
| 主权项 |
1. A multi-stage transmission of a planetary design comprising:
a drive shaft (1), an output shaft (2), first, second, third and fourth planetary gear sets (P1, P2, P3, P4) disposed within a housing each of the first, second, third, and fourth planetary gear sets including a sun gear, a ring gear, and a carrier (G), third, fourth, fifth, sixth, seventh and eighth rotatable shafts (3, 4, 5, 6, 7, 8), six shift elements (03, 04, 05, 14, 17, 18), comprising brakes (03, 04, 05) and clutches (14, 17, 18), whose selective engagement producing different transmission ratios between the drive shaft (1) and the output shaft (2) so that nine forward gears and one reverse gear are implementable, wherein the sun gear of the first planetary gear set (P1) is connected to the fifth shaft (5), the fifth shaft (5) can be coupled, via a third brake (05), to the housing (G), the fifth shaft (5) can be detachably connected, via a first clutch (15), to the drive shaft (1), the drive shaft (1) can be detachably connected, via a second clutch (17), to the seventh shaft (7), the seventh shaft which is connected to both the ring gear of the third planetary gear set (P3) and the carrier of the second planetary gear set (P2), the drive shaft (1) can be detachably connected, via a third clutch (18), to the eighth shaft (8), the eighth shaft (8) is connected to both the carrier of the first planetary gear set (P1) and the sun gear of the second planetary gear set (P2), the sixth shaft (6) is connected to both the ring gear of the second planetary gear set (P2) and the carrier of the fourth planetary gear set (P4), the fourth shaft (4) is connected to both the ring gear of the first planetary gear set (P1) and the sun gear of the fourth planetary gear set (P4), and the fourth shaft (4) can be coupled, via a second brake (04), to the housing (G), the third shaft (3) is connected to the sun gear of the third planetary gear set (P3) and can be coupled, via a first brake (03), to the housing (G), and the output shaft (2) is connected to both the carrier of the third planetary gear set (P3) and the ring gear of the fourth planetary gear set (P4). |
