Patent ID: 9091330
Filing Date: 2015-07-28
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; three interconnecting members each continuously interconnecting a member of one of the first, second, third and fourth planetary gear sets with another member of one of the first, second, third and fourth planetary gear sets; and eight torque transmitting mechanisms wherein three of the eight torque transmitting mechanisms are each selectively engageable to interconnect at least one of the first, second and third members of one of the first, second, third, and fourth planetary gear sets with at least one other of the first, second, third members of one of the first, second, third, and fourth planetary gear sets and wherein five of the eight torque transmitting mechanisms are each selectively engageable to interconnect at least one of the first, second and third members of one of the first, second, third, and fourth planetary gear sets with a stationary member, and wherein the eight torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member, a first and a second of the eight torque transmitting mechanisms are each selectively engageable to interconnect one of the first, second, and third members of one of the first, second, third, and fourth planetary gear sets with the input member.