Patent ID: 6551208
Filing Date: 2003-04-22
Classification: B60K,F16H,Y02T,Y10S

Abstract:
An electrically-variable transmission comprising:a transmission input shaft; a first planetary gear set having first, second, and third members, said first member being continuously interconnected with said input shaft; a first electrical power unit continuously interconnected with said second member of said first planetary gear set; a second planetary gear set having first, second, and third members with said first member being continuously interconnected with said third member of said first planetary gear set; a second electrical power unit continuously interconnected with said second member of said second planetary gear set; a third planetary gear set having three members, said first member being continuously interconnected with both said third member of said first planetary gear set and with said first member of said second planetary gear set, said second member of said third planetary gear set being continuously interconnected with a transmission output shaft; a first torque transmitting mechanism selectively interconnecting said first electrical power unit and said third member of said second planetary gear set for common rotation; a second torque transmitting mechanism selectively interconnecting said third member of said second planetary gear set with a stationary member; a third torque transmitting mechanism selectively interconnecting said second electrical power unit with said third member of said third planetary gear set for common rotation; a fourth torque transmitting mechanism selectively interconnecting said third member of said third planetary gear set with said stationary member; and said torque transmitting mechanisms being operated in combinations of two to establish three modes of power transmission between said input shaft and said output shaft.