Patent ID: 7371202

Claim:
An electrically variable transmission comprising: an input member to receive power from an engine; an output member; first, second and third motor/generators; first, second and third 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; 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 second member of said second gear set; a third interconnecting member continuously connecting said third member of said second gear set with said first 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 said third gear set; said third motor/generator being continuously connected with a member of said second or third gear set; wherein said first, second and third motor/generators are operable in a coordinated fashion to provide an electrically variable transmission with a continuously variable range of speed ratios between the input member and the output member.