Patent ID: 7806220
Filing Date: 2010-10-05
Classification: B60K,B60W,F16H

Abstract:
1. A motor vehicle, comprising: a powertrain operable for generating drive torque; a primary driveline for transmitting drive torque from said powertrain to first and second primary wheels; a secondary driveline for selectively transmitting drive torque from said powertrain to first and second secondary wheels, said secondary driveline including a rotary input member driven by said powertrain, a first rotary output member driving said first secondary wheel, a second rotary output member driving said second secondary wheel and a drive mechanism coupling said input member to said first and second output members, said drive mechanism including a differential assembly, a planetary gear assembly, first and second clutches and a brake, said differential assembly having an input component driven by said input member, a first output component driving said first output member and a second output component driving said second output member, said planetary gear assembly having first, second, third and fourth elements with said first element coupled to said first output member, said first clutch is operable for selectively coupling said second element of said planetary gear assembly to one of said input component and said second output component of said differential assembly, said second clutch is operable for selectively coupling said third element of said planetary gear assembly to the same one of said input component and said second output component of said differential assembly, and said brake is operable for selectively braking rotation of said fourth element of said planetary gear assembly; and a control system for controlling actuation of said first and second clutches and said brake.