| 摘要 |
A multiple speed ratio automatic transmission comprising a first gearset (36), a second gearset (30), first and second gear units (44,54), each gear unit having a sun gear (46,56) ring gear (48,58) planet pinions (52,62) meshing with the sun gear and ring gear, and carrier (50,60) rotatably supporting the planet pinions, the sun gear (46) of the first gear unit, carrier (60) of the second gear unit, and first gearset (36) mutually driveably connected, the carrier (50) of the first gear unit, ring gear (58) of the second gear unit, and output shaft mutually driveably connected, first brake means (82,84) for releasably holding the sun gear of the first gear unit, carrier of the second gear unit, and second gearset against rotation, first clutch means (76) for releasably connecting mutually the sun gear of the first gear unit, carrier of the second gear unit, first gearset and the output shaft, second clutch means (32) for releasably connecting the input shaft and first gearset, third clutch means (72) for releasably connecting the ring gear (48) of the first gear unit to the second gearset, and fourth clutch means (74) for releasably connecting the sun gear (56) of the second gear unit to the second gearset. <IMAGE> |
