Patent ID: 6620071
Filing Date: 2003-09-16
Classification: B60K

Abstract:
A power takeoff unit for a four-wheel drive vehicle, comprising:a planetary center differential having an axis of rotation operably connected to an input shaft, said center differential including at least three nested gear components for operably interconnecting said input shaft with both a planetary final drive and a rear drive transfer mechanism such that input torque to said power takeoff unit is split to the planetary final drive and the rear drive transfer mechanism in a predetermined ratio; and a biasing clutch aligned on said axis of rotation, said biasing clutch having an actuation mechanism and frictionally engagable members, wherein one of said frictionally engagable members is connected to at least one of said nested gear components of said planetary center differential or a front differential final drive carrier of the planetary final drive in a manner such that the torque split is controlled by a torque level established between the frictionally engagable members of said biasing clutch.