| 摘要 |
A planetary transmission for selectively shifting among six forward speeds and two reverse speeds includes a single planet carrier carrying four planet gear sets and clutchable to a drive shaft. First and second planet gear sets mesh respectively with first and second sun gears secured to the drive shaft and with encircling brake-associated first and second ring gears. A third planet gear set meshes with a centrally apertured third sun gear and with an encircling brake-associated third ring gear. A fourth planet gear set meshes with the third planet gear set and with a fourth sun gear secured to a driven shaft which extends through the central aperture of the third sun gear and which is clutchable to the third sun gear.
|
