Electronic Hydraulic Function

Courtesy of VOLVO CARS CORPORATION

1. Differential electronic module (DEM)
2. Electrical feed pump.
3. Disc pack
4. Bleed valve

The differential electronic module (DEM) communicates with the engine control module and the brake control module (BCM) via CAN. Led by the sensor signals, the differential electronic module (DEM) directs the oil pressure to the clutch plates through the pump mechanism in the pump. The differential electronic module (DEM) controls the pump to achieve the desired working pressure, 0-40 bar. The oil pressure to the clutch plates determines how much torque can be transferred to the rear wheels.