| 摘要 |
The described system and method provide a continuously variable full range transmission having inputs for receiving rotational power from a primary power source and a secondary power source such as a hydraulic variator. A first planetary gear group contains first and second planetary gear sets, and the inputs for receiving rotational power are linked to one or more of the first planetary gear set and the second planetary gear set. A second planetary gear group includes a third planetary gear set and a fourth planetary gear set, with a nested clutch assembly having first and second selectable clutches being provided to link the first planetary gear group to the second planetary gear group. Activation of the first clutch fixes the continuously variable transmission in a first speed range, while activation of the second clutch fixes the continuously variable transmission in a second speed range.
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