Patent ID: 8197382
Filing Date: 2012-06-12
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 plurality of interconnecting members each continuously interconnecting one of the first, second, and third members of the planetary gear sets with another one of the first members, second members, and third members of the planetary gear sets and a stationary member; a first torque transmitting mechanism selectively engageable to interconnect the second member of the fourth planetary gear set with the stationary element; a second torque transmitting mechanism selectively engageable to interconnect the second member of the fourth planetary gear set with the second member of the first planetary gear set; a third torque transmitting mechanism selectively engageable to interconnect the second member of the fourth planetary gear set with the third member of the second planetary gear set; a fourth torque transmitting mechanism selectively engageable to interconnect at least one of the first member of the fourth planetary gear set and the input member with the third member of the second planetary gear set; and a fifth torque transmitting mechanism selectively engageable to interconnect at least one of the second member of the third planetary gear set and the output member with the second member of the first planetary gear set, and wherein the torque transmitting mechanisms 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.