Patent ID: 7479080
Filing Date: 2009-01-20
Classification: B60K,F16H,Y02T

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 and second differential gear sets each having first, second and third members; said input member being continuously connected with a member of said first gear set, and said output member being continuously connected with a member of said second gear set; an interconnecting member continuously connecting said first member of said first gear set with said first member of said second gear set; a brake selectively connecting a member of said first or second gear set with a stationary member for enabling series hybrid reverse operation in the electrically variable transmission; 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 another member of said first or second gear set; wherein said first, second and third motor/generators are operable in a coordinated fashion to provide said electrically variable transmission with a continuously variable range of speed ratios between said input member and said output member.