Triple clutch multi-speed transmission

摘要

A transmission is disclosed having a planetary gear set with three input torque-transmitting mechanisms, such as friction clutches, to achieve torque flow through the planetary gear set to a countershaft gearing arrangement. The transmission includes an input member, an output member, a planetary gear set, an input clutch assembly having three input clutches and a countershaft gearing arrangement. The countershaft gearing arrangement is operatively connected with the planetary gear set and includes: a pair of co-planar intermeshing gears, first and second countershafts, a first intermediate shaft and a second intermediate shaft concentric with the first intermediate shaft.

主权项

1. A transmission comprising:
an input member; an output member; a planetary gear set having first, second and third members; a clutch assembly having a first, a second and a third torque-transmitting mechanism each selectively engageable to connect the input member with a respective different one of the members of the planetary gear set; a first intermediate shaft connected for common rotation with the first member of said planetary gear set; a second intermediate shaft connected for common rotation with the second member of said planetary gear set, wherein the second intermediate shaft is concentric with the first intermediate shaft; a first countershaft radially offset from the intermediate shafts; a second countershaft radially offset from the intermediate shafts; a first countershaft transfer gear connected for common rotation with the first countershaft and in communication with the output member to transfer torque from the first countershaft to the output member; a second countershaft transfer gear connected for common rotation with the second countershaft and in communication with the output member to transfer torque from the second countershaft to the output member; a pair of co-planar intermeshing gear sets, wherein at least one of the gears of the pair of co-planar intermeshing gear sets is fixed for common rotation with at least one of the intermediate shafts and each of the pair of co-planar intermeshing gear sets include a first gear intermeshing with each of a second and a third gear; and a plurality of synchronizers, wherein at least one of the plurality of synchronizers is selectively engagable to connect at least one of the gears of the plurality of co-planar intermeshing gear sets with at least one of the first and second countershafts for common rotation therewith, thereby transferring torque from the planetary gear set to at least one of the first and second countershaft transfer gears through at least one of the intermediate shafts and at least one of the sets of co-planar intermeshing gear sets.