Synchronizing disconnect device

摘要

A transmission includes an input member, an output member, a set of four planetary gear sets each having first, second, and third members, a plurality of torque transmitting mechanisms each selectively engageable to interconnect at least one of the first, second, and third members with at least one other of the first, second, third members and a stationary member, and a synchronizer assembly that selectively connects and disconnects one member of one of the planetary gear sets.

主权项

1. A transmission comprising:
an input member; an output member; first, second, third and fourth planetary gear sets concentrically disposed about the input member, each planetary gear set having first, second and third members; six torque transmitting mechanisms each selectively engageable to interconnect at least one of the first, second, and third members with at least one other of the first, second, third members and a stationary member; a synchronizer assembly that selectively connects and disconnects one member of one of the planetary gear sets, the synchronizer assembly including a synchronizer piston that actuates the synchronizer assembly, the synchronizer assembly further including a synchronizer sleeve, a synchronizer cone, and a synchronizer hub coupled to the synchronizer sleeve and the synchronizer cone, the synchronizer piston applying a force to the synchronizer sleeve such that the synchronizer cone engages with a hub associated with the one member of one of the planetary gear sets to synchronize speeds, and wherein the six torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least ten forward speed ratios and at least one reverse speed ratio between the input member and the output member.