Patent ID: 8721488
Filing Date: 2014-05-13
Classification: F16H

Abstract:
1. A transmission comprising: an input member, an output member; a first and a second planetary gear set each having a first, a second, and a third member, wherein each of the first, second, and third members is included in one of a first rotary member, a second rotary member, a third rotary member, and a fourth rotary member, and wherein two of the members of the first planetary gear set are continuously separately connected with two of the members of the second planetary gear set to form two of the first, second, third, and fourth rotary members; a third and a fourth planetary gear set each having a first, a second, and a third member, wherein each of the first, second, and third members is included in one of a fifth rotary member, a sixth rotary member, a seventh rotary member, and an eighth rotary member, and wherein two of the members of the third planetary gear set are continuously separately connected with two of the members of the fourth planetary gear set to form two of the fifth, sixth, seventh, and eighth rotary members; a first coplanar gear set having a first member meshed with a second member, wherein the first member is continuously connected with the third rotary member and the second member of the first co-planar gear set is continuously connected with the eighth rotary member; a second co-planar gear set having a first member meshed with a second member, wherein the first member is continuously connected with the first rotary member and the second member of the second co-planar gear set is separately selectively connectable with the fifth and seventh rotary members; and six torque transmitting devices each selectively engageable to connect at least one of the first, second, third, fourth, fifth, sixth, seventh, and eighth rotary members with at least one other of a stationary member, the first and second members of the first and second co-planar gear sets, and the first, second, third, fourth, fifth, sixth, seventh, and eight rotary members, and wherein the torque transmitting devices 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.