Patent ID: 8808135

Claim:
A drive train connected with an engine in a motor vehicle, the drive train comprising: a launch device having a pump and a launch planetary gear set having a first, a second, and a third member, wherein one of the first, second, and third members of the launch planetary gear set is connected with the engine and another of the first, second, and third members is connected with the pump; a transmission input member connected for common rotation with yet another of the first, second, and third members of the launch planetary gear set; a transmission output member; first, second, third, and fourth planetary gear sets each having a first, a second, and a third member, wherein the second member of the first planetary gear set is connected with the second member of the second planetary gear set, the third member of the first planetary gear set is connected with the third member of the second planetary gear set and the first member of the third planetary gear set, the second member of the third planetary gear set is connected with the second member of the fourth planetary gear set, the third member of the third planetary gear set is connected with the third member of the fourth planetary gear set, and the transmission output member is connected for common rotation with the second member of the third planetary gear set and the second member of the fourth planetary gear set; six torque transmitting mechanisms each selectively engageable to interconnect one of the first members, second members, and third members of the first, second, third, and fourth planetary gear sets with at least one other of the first members, second members, and third members, of the first, second, third, and fourth planetary gear sets and a stationary member, and wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to produce a plurality of forward speed ratios between the transmission input member and the transmission output member.