Patent ID: 7473199

Claim:
An electrically variable transmission comprising: an input member to receive power from an engine; an output member; first and second motor/generators; first and second differential gear sets each having first, second and third members; said input member being either continuously or selectively connected with at least one member of said gear sets but not both; 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 planetary gear set, or selectively connected via a dog clutch with a member of said first or second gear set; said second motor/generator being continuously connected with a member of said first or second gear set; a first torque transmitting device selectively connecting a member of said first gear set with said input member or with a member of said second gear set; a second torque transmitting device selectively connecting a member of said second gear set with a member of said first gear set; a third torque transmitting device selectively connecting a member of said first gear set with a member of said second gear set or with said input member; a fourth torque transmitting device selectively connecting a member of said first gear set with a stationary member; a fifth torque transmitting device selectively connecting a member of said second gear set with said stationary member; and wherein said first, second, third, fourth and fifth torque transmitting devices are engagable to provide the electrically variable transmission with a continuously variable range of speed ratios and at least four fixed forward speed ratios.