Patent ID: 8485930

Claim:
A transmission in combination with an engine having a rotatable engine output member; the transmission comprising: an input member; wherein the input member is connected for rotation with the rotatable engine output member; an output member; a planetary gear set having a first member, a second member, and a third member; a first electric motor/generator having a first rotor connected for rotation with the first member of the planetary gear set; a second electric motor/generator having a second rotor connected for rotation with the second member of the planetary gear set; a first set of intermeshing gears having a first gear ratio; a second set of intermeshing gears having a second gear ratio different than the first gear ratio; a first torque-transmitting mechanism selectively engageable to establish torque flow between the planetary gear set and the input member through the first set of intermeshing gears; a second torque-transmitting mechanism selectively engageable to establish torque flow between the planetary gear set and the input member through the second set of intermeshing gears; a first input shaft; wherein the first torque-transmitting mechanism is selectively engageable to connect the input member for common rotation with the first input shaft; a second input shaft concentric with the first input shaft; wherein the second torque-transmitting mechanism is selectively engageable to connect the input member for common rotation with the second input shaft; and wherein the first and second torque-transmitting mechanisms are both disengaged to disconnect the engine from the transmission and the first and second motor/generators are operated as motors to establish at least one electric-only operating mode.