Patent ID: 8771120

Claim:
A control system for controlling an axle clutch, the control system comprising: a pressurized fluid source; a solenoid in downstream fluid communication with the pressurized fluid source; a valve assembly having a valve movably disposed within a valve body, the valve body having an inlet port in downstream fluid communication with the solenoid and an outlet port in upstream fluid communication with the axle clutch, wherein the valve is moveable between at least two positions and wherein the outlet port is in communication with the inlet port when the valve is in the first position and wherein the outlet port is not in communication with the inlet port when the valve is in the second position; and a control device configured to move the valve to at least one of the first and second positions, a wheel speed sensor configured to detect a speed of a wheel coupled to the axle clutch; and wherein the axle clutch is engaged by a hydraulic fluid flow from the pressurized fluid source when the solenoid is in an open mode and the valve is in the first position and the solenoid modulates a pressure of the hydraulic fluid flow to control a slip of the axle clutch according to the speed signal detected by the wheel speed sensor.