Toroidal traction drive transmission

摘要

A continuously variable transmission includes a gearbox with a forward mode and a reverse mode. The gearbox includes a plurality of gear members and further includes at least two torque transmitting devices such as, a clutch and a brake that are selectively employed to engage various combinations of the gear members such that a particular combination is associated with one of the forward mode and the reverse mode.

主权项

1. A transmission for a motor vehicle, the transmission comprising:
an input member; an output member; a variator having an input coupled to the input member and an output; a first transfer gear set having a first gear coupled to the output of the variator and a second gear; a planetary gear set having a sun gear, a planet gear carrier member and a ring gear, wherein the ring gear of the planetary gear set is coupled to the second gear of the first transfer gear set; a friction brake configured to selectively couple the planet gear carrier member of the planetary gear set to a stationary member; a second transfer gear set having a first gear coupled to the sun gear of the planetary gear set and a second gear in mesh with the first gear of the second transfer gear set; and a friction clutch selectively engageable to interconnect the ring gear of the planetary gear set with the sun member of the planetary gear set, and wherein a plurality of forward speeds are established between the input member and the output member through manipulation of the variator.