DSC unit

The DSC unit consists of the DSC control unit and a hydraulic unit. The DSC control unit activates the hydraulic unit via valve coils.

Fig 1: Identifying DSC Control And Hydraulic Unit

Courtesy of BMW OF NORTH AMERICA, INC.

The DSC unit contains a brake pressure sensor. This brake pressure sensor registers the braking pressure applied by the brake pedal and the brake booster. The brake pressure sensor has a measuring range from 0 to 250 bar. Its zero point is only synchronized during driving.

The new concept of the DSC unit enables more exact control. 2 x 3 pump elements with ø 6.5 mm work in the pump motor. This concept results in significantly improved pressure dynamics. It means that the brake pedal pulses to a lesser degree during ABS control. It also leads to higher control quality with Hill Descent Control (HDC).

Fig 2: DSC Volumetric Flow Waveform

Courtesy of BMW OF NORTH AMERICA, INC.

The power distribution box at the junction box electronics (JBE) supplies the DSC unit with voltage. Once terminal 30 for the return-flow pump, once terminal 30 for the solenoid valves. The DSC control unit receives terminal 30F.