Patent ID: 7625307

Claim:
An electrically variable transmission comprising: an input member to receive power from an engine; an output member, said transmission having no more than one output member; first, second and third motor/generators; first and second differential gear sets each having first, second and third members; said input member being continuously connected with a member of said gear sets, and said output member being continuously connected with another member of said gear sets; an interconnecting member continuously connecting said first member of said first gear set with said first member of said second gear set, said transmission having no more than one interconnecting member between said first gar set and said second 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 said second gear set; said third motor/generator being continuously connected with a member of said first or second gear set; wherein none of said first, second and third motor/generators are directly connected with said input member; wherein none of said first, second, and third motor/generators are directly connected with said output member; and wherein said first, second and third motor/generators are operable to provide an electrically variable transmission with a continuously variable range of speed ratios between said input member and said output member.