Patent ID: 8801566
Filing Date: 2014-08-12
Classification: F16H

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