Patent ID: 7371201
Filing Date: 2008-05-13
Classification: B60K,F16H,Y02T,Y10S

Abstract:
1. 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 one of said first, second and third members of said gear sets, and said output member being continuously connected with another of said first, second and third members 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 second gear set; said first motor/generator being continuously connected with one of said first, second and third members of said first or second gear set; said second motor/generator being continuously connected with one of said first, second and third members of said second or third gear set; said third motor/generator being continuously connected with one of said first, second and third members of said first 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 said input member and said output member; wherein said input member is not directly continuously connected with said motor/generators.