| 摘要 |
A continuously-variable ratio automotive transmission, especially of the toroidal race rolling-traction type, in which mechanism comprising a clutch, a brake and two epicyclics-a reversing train and a mixing train-is interposed between the ratio-varying unit and the output member of the transmission as a whole. By operation of the clutch and the brake the elements within the mechanism may be arranged in two different combinations whereby the transmission may operate in first and second "regimes", one or other of which will offer efficient transmission throughout the entire operating range of the source of automotive power. The invention lies in a particular choice of the two different combinations resulting firstly in a transmission notably short in axial length. Secondly in the feature that in the regime including the reverse and lower forward speeds of the output member, power is transmitted to it from the variator through the full gearing of the two epicyclic trains, the planet carrier of the reversing train then being locked by a connected braking arm which lies parallel to the transmission axis and reaches its point of anchorage by passing through the middle of an annular gear which constitutes the output member. |
