| 摘要 |
<p>A four-speed automatic transmission (10) for a vehicle includes a transmission housing (12), an input member (14), an output member (16), three planetary gearsets (20) for changing a ratio of torque between the input member and the output member, a plurality of clutch assemblies (22, 24, 26) to selectively couple the input member to predetermined gears of the planetary gearsets, a plurality of brake assemblies (28, 30, 32) to selectively couple predetermined gears of the planetary gearsets (20) to the transmission housing, and a structure for allowing the output member and a planetary carrier from one of the planetary gearsets and an annulus gear of another of the planetary gearsets (20) to rotate simultaneously.</p> |
