Patent ID: 7458911

Claim:
A drive system for use in a drivetrain of a motor vehicle, said drive system comprising: an input member; a pair of output members drivingly coupled to said input member; a differential gear assembly operatively disposed between said pair of output members to allow different speeds of rotation therebetween; a friction clutch assembly for selectively engaging and disengaging said input member with one of said output members, said clutch assembly comprising at least one first clutch member coupled to rotate with one of said output members and at least one second clutch member coupled to rotate with said input member; a fluid clutch actuator for selectively frictionally and variably loading said clutch assembly, said clutch actuator being selectively controlled in response to a difference in speed between said pair of output members to limit the relative rotation between said input member and one of said output members thereby limiting the speed differential between said output members; a power transmission functionally separate from said friction clutch assembly and said fluid clutch actuator, said power transmission including a fluid pump therein; and a fluid accumulator selectively communicating with said fluid clutch actuator for loading said friction clutch assembly, said fluid accumulator is selectively charged by said fluid pump; said fluid pump being a common source of pressurized fluid for said fluid clutch actuator and said power transmission of said motor vehicle, said fluid clutch actuator being actuated by fluid pressure generated by said fluid pump.