Patent ID: 7473200

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 and with said first member of said third gear set; a second interconnecting member continuously connecting said second member of said first 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 first gear set with a stationary member; a second torque transmitting device selectively connecting a member of said second 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 the third gear set with a said input member; 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.