Patent ID: 8439787
Filing Date: 2013-05-14
Classification: F16H,Y10T

Abstract:
1. A multi-speed transmission comprising: an input member; an output member; a stationary member; a first intermediate member and a second intermediate member; a planetary gear set having a first member, a second member and a third member; wherein the first member is connected for common rotation with the input member; wherein the input member, the output member, the intermediate members, and the planetary gear set are arranged coaxially with one another to define a first axis of rotation; a first and a second layshaft defining a second axis of rotation and a third axis of rotation, respectively; nine torque-transmitting mechanisms; five sets of intermeshing gears each arranged to transfer torque from a respective one of the intermediate members to a respective one of the layshafts via engagement of different respective ones of the torque-transmitting mechanisms, each set of intermeshing gears being axially spaced from the other sets of intermeshing gears; a set of transfer gears arranged to transfer torque from the layshafts to the output member; wherein the nine torque-transmitting mechanisms are engagable in different combinations to establish up to eight forward speed ratios and at least one reverse speed ratio between the input member and the output member; wherein the nine torque-transmitting mechanisms include a first torque-transmitting mechanism that is selectively engagable to connect the input member for common rotation with the second member of the planetary gear set, and a second torque transmitting mechanism engagable to connect the second member of the planetary gear set to the stationary member; and wherein one of the first and the second torque-transmitting mechanisms is engaged in each of the forward speed ratios.