| 摘要 |
An off-highway vehicle has a continuously-variable-ratio transmission (15) of the rolling traction type. In order to produce forward reverse and geared neutral, an epicyclic gear (12) sums the output of the transmission (10), taken via epicyclic gear (13) which steps the output down, with the input (1) to the transmission. Depending on their relative speeds, the output (14) produces forward, reverse or geared neutral. Epicyclic gear (13) only acts as a step down when its carrier for the planets (13b) is locked. The carrier can be released in order to declutch the transmission. The arrangement offers the advantage of compactness and of a true neutral.
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