Patent ID: 7238135
Filing Date: 2007-07-03
Classification: F16H

Abstract:
1. A powertrain having a three-mode continuously variable transmission with a direct low mode and two split path high modes comprising: input means for delivering power to said continuously variable transmission; a transmission housing; output means for delivering power from said continuously variable transmission; a continuously variable unit having an input member continuously interconnected with said input means and an output member; a first planetary gear arrangement having a first member continuously interconnected with said output member, a second member, and a third member; a second planetary gear arrangement having a first member continuously interconnected with said second member of said first planetary gear arrangement, a second member continuously interconnected with said output means, and a third member; a first torque transmitting mechanism for selectively interconnecting said third member of said second planetary gear arrangement with said transmission housing; a second torque transmitting mechanism operable to interconnect two of said members of said first planetary gear arrangement; a third torque transmitting mechanism operable to continuously interconnect said third member of said first planetary gear arrangement with said transmission housing; a fourth torque transmitting mechanism operable to selectively interconnect said input means and said third member of said second planetary gear arrangement; and said torque transmitting mechanisms being operable in combinations of two to establish three forward modes and one reverse mode between input means and said output means.