Patent ID: 7473201

Claim:
An electrically variable transmission comprising: an input member to receive power from an engine; an output member; first and second motor/generators; first, second and third differential gear sets each having first, second and third members; said input member being selectively connected with at least one member of said gear sets, and said output member being continuously connected with another member of said gear sets; a first interconnecting member continuously connecting said first member of said first gear set with said first member of said second gear set; a second interconnecting member continuously connecting said second member of said first gear set with said first member of said third gear set; a third interconnecting member continuously connecting said second member of said second gear set with said second member of said third gear set; said first motor/generator being continuously connected with a member of said first gear set; said second motor/generator being continuously connected with a member of the second gear set; a first torque transmitting device selectively connecting a member of said third gear set with a stationary member; a second torque transmitting device selectively connecting a member of said first or third gear set with said stationary member; a third torque transmitting device selectively connecting a member of said second gear set with said input member; a fourth torque transmitting device selectively connecting a member of said first or third gear set with a member of said second gear set; a fifth torque transmitting device selectively connecting a member of said second gear set with said input member; and wherein said first, second, third, fourth and fifth torque transmitting devices are engagable to provide an electrically variable transmission with a continuously variable range of speed ratios, four fixed forward speed ratios and one fixed reverse speed ratio.