Patent ID: 7507174

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 continuously or 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; said first motor/generator being continuously connected with a member of said first or third gear set, or selectively connected via a dog clutch with a member of said first, second or third gear set; said second motor/generator being continuously connected with a member of the second or third gear set; a first torque transmitting device selectively connecting a member of said first or second gear set with another member of said second gear set; a second torque transmitting device selectively connecting a member of said first gear set with a member of said second gear set; a third torque transmitting device selectively connecting a member of said second gear set with another member of said first gear set; a fourth torque transmitting device selectively connecting a member of the third gear set with another member of said first or third gear set; a fifth torque transmitting device selectively connecting a member of said third gear set with a member of said first or second gear set; a sixth torque transmitting device selectively connecting a member of said second gear set with a stationary member; a seventh torque transmitting device selectively connecting a member of said third gear set with said stationary member; and wherein said first, second, third, fourth, fifth, sixth and seventh torque transmitting devices are engagable to provide an electrically variable transmission with a continuously variable range of speed ratios and up to six fixed forward speed ratios.