Ebd Function; Vdc System; Electro-Hydraulic Control Unit - Alfa Romeo 159 Training Material

BRAKING SYSTEM

6.1.4 EBD function

The EBD is integrated in the ABS for optimising brake distribution with respect to a mechanical brake corrector. The
system measures the slip of the front and rear wheels and adjusts the brake force to ensure that the slip of the rear
wheels is always lower than that of the front wheels. Based on the real grip with the ground, the system can
automatically control rear pressure increases due to changes in vehicle load, road gradient and friction material
efficiency.

6.2 VDC SYSTEM

The VSC EBC430NG system is available for all engine versions. It consists of a 12 valve electro-hydraulic unit and
integrated pressure sensor which a steering angle sensor built into the steering wheel stalk and the longitudinal,
lateral and yaw accelerator sensor built into a unit fitted on the tunnel near the centre of gravity of the car. The main
functions of the system in addition to the ABS functions are:
Hill Holder
HBA
VDC
ASR
MSR

Electro-hydraulic control unit

1. Electro-hydraulic control unit
2. Solenoid valves (12)
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