Patent ID: 7717817
Filing Date: 2010-05-18
Classification: B60K,F16H,Y02T

Abstract:
1. 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 not being continuously connected with any member of said gear sets, and said output member being continuously connected with a member of said gear sets; said first motor/generator being alternately connected with two of a member of the first gear set, a member of the second gear set, and said input member via a dog clutch; said second motor/generator being continuously connected with a member of said first or second gear set; first, second, third and fourth torque transmitting devices for selectively interconnecting said members of said first and second gear sets with said input member or with other members of said differential gear sets, said first, second, third and fourth torque transmitting devices being engageable to provide an electrically variable transmission with a continuously variable range of speed ratios and at least one fixed forward speed ratio between said input member and said output member.