| 摘要 |
A multiple-speed automatic transmission includes an input, output, a first gear unit drivable connected to the input and including a component rotating at the speed of the input and a first gear unit output, the first gear unit producing a gear ratio of a speed of the input and a speed of a first gear unit output, the gear ratio being greater than unity, and a Ravigneaux gear unit for producing multiple ratios of the speed of the input and a speed of the output, the Ravigneaux gear unit being driveably connected to first, second, third, fourth, fifth and sixth rotating members and the output. A first clutch connects the first gear unit output and the first rotating member; a second clutch connects the first gear unit output and the second rotating member; a third clutch connects the third rotating member and one of the input and the rotating component, a fourth clutch connects the fourth rotating member and one of the input and the component; a first brake holds the fifth rotating member against rotation; and a second brake holds the sixth rotating member against rotation.
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