Patent ID: 8277356
Filing Date: 2012-10-02
Classification: F16H

Abstract:
1. A transmission comprising: an input member; an output member; first, second, third and fourth planetary gear sets each having first, second and third members; a first interconnecting member continuously interconnecting the third member of the first planetary gear set with the third member of the second planetary gear set and the first member of the fourth planetary gear set; a first torque transmitting device selectively engageable to interconnect the first member of the second planetary gear set with at least one of the second member of the first planetary gear set and the input member; a second torque transmitting device selectively engageable to interconnect at least one of the third member of the second planetary gear set, the third member of the first planetary gear set, and the first member of the fourth planetary gear set with the second member of the third planetary gear set; a third torque transmitting device selectively engageable to interconnect the first member of the second planetary gear set with a stationary member; a fourth torque transmitting device selectively engageable to interconnect the second member of the third planetary gear set with the stationary member; and a fifth torque transmitting device selectively engageable to interconnect the third member of the fourth planetary gear set with the stationary member, and wherein the torque transmitting devices are selectively engageable in combinations of at least two to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member.