LEMON Manuals: Even more car manuals for everyone
Home >> Land Rover >> 2017 >> Discovery Sport SE >> Repair and Diagnosis >> Drivelines & Axles >> Driveshaft & Universal Joints >> Four-Wheel Drive Systems - Vehicles With: Active Driveline -- Discovery Sport/L550 >> Four-Wheel Drive Systems - Vehicles With: Active Driveline >> Description And Operation >> Four-Wheel Drive >> Operation >> All Wheel Drive (AWD) Valve Block

All Wheel Drive (AWD) Valve Block

The four pressure control valves located in the AWD valve block are solenoid operated and controlled by the AWDCM. The valves are marked P1 for the right side clutch, P2 for the left side clutch, P3 to connect the PTU and P4 to disconnect the PTU.

The solenoids are PWM controlled by the AWDCM.

The pressure control valves are used to electronically reduce the pressure supplied to the PTU synchronizer and the RDU clutches to give precise control.

When the solenoid coil is de-energized, the pressure control valve is closed by spring force and no pressure is applied to the synchronizer or the clutches. Any fluid pressure remaining in the system is decayed back to the AWD valve block fluid reservoir.

When a current is applied to the solenoid coil, the pressure control valve spool will begin to move to connect the pressure inlet from the pump to the synchronizer or clutch. The pressure applied is controlled by the pump output and the current applied to the solenoid coil. As the coil current signal increases or reduces the pressure applied to the synchronizer or clutch will change with respect to the signal. When the coil current is at its maximum, the full pressure will be applied.

The AWDCM can control each solenoid individually and simultaneously, giving infinite control over the operation of the synchronizer and the RDU clutch operation.

scientia non olet · About LEMON Manuals