Patent ID: 7510041
Filing Date: 2009-03-31
Classification: B60K,Y10T

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 an input shaft driven by said powertrain, a first axleshaft driving said first secondary wheel, a second axleshaft driving said second secondary wheel, and a drive mechanism for selectively coupling said input shaft to one or both of said first and second axleshafts, said drive mechanism including a drive component driven by said input shaft and first and second drive units operably disposed between said drive component and said first and second axleshafts, said first drive unit including a first gearset and first and second mode clutches, said first gearset including a first input member driven by said drive component, a first output member driving said first axleshaft and a first reaction member, said first mode clutch is operable to selectively brake rotation of said first reaction member and said second mode clutch is operable to selectively couple said first reaction member for rotation with one of said first input member and said first output member, said second drive unit including a second gearset and third and fourth mode clutches, said second gearset including a second input member driven by said drive component, a second output member driving said second axleshaft and a second reaction member, said third mode clutch is operable to selectively brake rotation of said second reaction member and said fourth mode clutch is operable to selectively couple said second reaction member for rotation with one of said second input member and said second output member; and a control system for controlling actuation of said mode clutches.