Patent ID: 7503866
Filing Date: 2009-03-17
Classification: B60K

Abstract:
1. A motor vehicle, comprising: a powertrain operable for generating drive torque; and a driveline for selectively transmitting drive torque from said powertrain to first and second wheels, said driveline including an input shaft driven by said powertrain, a first axleshaft driving said first wheel, a second axleshaft driving said second 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 transfer shaft driven by said input shaft and first and second drive units, said first drive unit including a first planetary gearset, a first mode clutch and a first overrunning clutch, said first planetary gearset is operably disposed between said transfer shaft and said first axleshaft, said first mode clutch is operably associated with said first planetary gearset to establish variable speed drive connections between said transfer shaft and said first axleshaft, and said first overrunning clutch is operable to selectively lock-up said first planetary gearset to establish a direct drive connection between said transfer shaft and said first axleshaft, said second drive unit including a second planetary gearset, a second mode clutch and a second overrunning clutch, said second planetary gearset is operably disposed between said transfer shaft and said second axleshaft, said second mode clutch is operably associated with said second planetary gearset to establish variable speed drive connections between said transfer shaft and said second axleshaft, and said second overrunning clutch is operable to selectively lock-up said second planetary gearset to establish a direct drive connection between said transfer shaft and said second axleshaft.