| 摘要 |
The transmission with nine forward and one reverse gear includes four planetary gearsets, eight shafts and six shifting elements, the sun gear of gearset (P1) couples shaft (4) which can couple brake (04) to the housing. The input shaft can couple, via clutch (13), shaft (03) which is couples the carrier of gearset (P1) and the ring gear of gearset (P4) and can couple, via brake (03), the housing. The input shaft can couple, via clutch (16), shaft (6) which couples the ring gears of gearsets (P2, P3) and can couple, via clutch (17), shaft (7) which couples the sun gear of gearset (P2) and the ring gear of gearset (P1). Shaft (8) couples the carriers of gearsets (P2, P4). Shaft (5) couples the sun gears of gearsets (P3, P4) and can couple, via brake (05), the housing. The output shaft couples the carrier of gearset (P3). |
| 主权项 |
1. A multi-stage automatic transmission of a planetary design for a motor vehicle, the transmission comprising:
a drive input shaft (1) and a drive output shaft (2); first, second, third and fourth planetary gearsets (P1, P2, P3, P4) being arranged within a housing (G), each of the first planetary gearset (P1), the second planetary gearset (P2), the third planetary gearset (P3) and the fourth planetary gearset (P4) comprises a sun gear, a ring gear and a carrier; third, fourth, fifth, sixth, seventh and eighth rotating shafts (3, 4, 5, 6, 7, 8); six shifting elements (03, 04, 05, 13, 16, 17) comprising first, second and third brakes (03, 04, 05) and first, second and third clutches (13, 16, 17), selective engagement of the first brake, the second brake, the third brake, the first clutch, the second clutch and the third clutch produces various transmission ratios between the drive input shaft (1) and the drive output shaft (2) such that nine forward gears and one reverse gear can be implemented; the sun gear of the first planetary gearset (P1) is connected to the fourth shaft (4) which is connectable by the second brake (04) to the housing (G) of the transmission; the drive input shaft (1) is detachably connectable by the first clutch (13) to the third shaft (3) which is connected to the carrier of the first planetary gearset (P1) and to the ring gear of the fourth planetary gearset (P4), and the third shaft (3) being connectable, by the first brake (03), to the housing (G) of the transmission; the drive input shaft (1) being detachably connected by the second clutch (16) to the sixth shaft (6) which is connected to the ring gear of the second planetary gearset (P2) and to the ring gear of the third planetary gearset (P3), the drive input shaft (1) being detachably connectable by the third clutch (17) to the seventh shaft (7) which is connected to the sun gear of the second planetary gearset (P2) and to the ring gear of the first planetary gearset (P1); the eighth shaft (8) being connected to the carrier of the second planetary gearset (P2) and to the carrier of the fourth planetary gearset (P4); the fifth shaft (5) being connected to the sun gear of the third planetary gearset (P3) and to the sun gear of the fourth planetary gearset (P4) and being connectable by a third brake (05) to the housing (C); and the drive output shaft (2) of the transmission is connected to the carrier of the third planetary gearset (P3). |
