Patent ID: 7353927

Claim:
A torque-coupling assembly comprising: a rotatable torque-coupling case; at least one output shaft drivingly operatively connected to said torque-coupling case; a friction clutch assembly for selectively engaging and disengaging said torque-coupling case and said at least one output shaft; a hydraulic pump for generating a hydraulic fluid pressure to frictionally load said clutch assembly; a fluid control passage through which a hydraulic fluid is discharged from said torque-coupling case; and a variable pressure-control valve assembly including a spool valve disposed in said fluid control passage and an electro-magnetic actuator for producing a variable axial electro-magnetic force acting against said spool valve so as to selectively adjust the position of said spool valve in said fluid control passage in order to selectively control the flow rate of said hydraulic fluid in said fluid control passage; said electro-magnetic actuator including an electro-magnetic coil assembly and an armature axially movable relative thereto; said armature is disposed radially inwardly of said electro-magnetic coil assembly.