Patent ID: 8585520

Claim:
A transmission comprising: an input member; an output member; a stationary member; first and second planetary gearsets, each of said first and second gearsets having respective first, second, and third members; a single motor/generator having a rotor that is operatively connected to one of the members of the planetary gearsets for rotation therewith; and a plurality of torque transmitting devices, each of said torque transmitting devices being selectively engageable to operatively interconnect a respective one of the members of the first or second planetary gearsets to another of the members of the first or second planetary gearsets, the input member, the output member, or the stationary member; wherein the torque transmitting devices are engageable in various combinations to provide a plurality of fixed speed ratio modes in which the value of the speed ratio between the input member and the output member is independent of the speed of the rotor; and wherein the torque transmitting devices are engageable in at least one combination to provide an electrically variable mode of operation in which the speed ratio between the input member and the output member is dependent on the speed of the rotor; wherein the first member of the first planetary gearset is operatively connected to the first member of the second planetary gearset for unitary rotation; wherein the second member of the first planetary gearset is operatively connected to the third member of the second planetary gearset and the output member for unitary rotation; wherein the rotor is operatively connected to the first member of the first planetary gearset and the first member of the second planetary gearset for unitary rotation; wherein the plurality of torque transmitting devices includes first, second, third, and fourth torque transmitting devices; wherein the first torque transmitting device is configured to selectively couple the input member to the third member of the first planetary gearset for unitary rotation; wherein the second torque transmitting device is configured to selectively couple the first member of the first planetary gearset, the first member of the second planetary gearset, and the rotor to the stationary member; wherein the third torque transmitting device is configured to selectively couple the first member of the first planetary gearset, the first member of the second planetary gearset, and the rotor to the second member of the second planetary gearset for unitary rotation; and wherein the fourth torque transmitting device is configured to selectively couple the second member of the second planetary gearset to the stationary member.