Electronic system of distribution of brake effort (EBV)
Audi A4 does without traditional regulator of brake effort for back wheels. Instead of mechanical or hydraulic control pressure uses the hydraulic ABS module for electronic distribution of brake effort (Elektronische Bremskraft-Verteilung). It is carried out by the ABS control unit.
The control unit by means of the sensor of speed controls delay of each back wheel and compares sizes of a forward and back axis. If when braking distinction between the speed of forward and back wheels too big, then pressure upon brakes of back wheels decreases by means of electromagnetic valves in the hydraulic module. In such a way excessive braking of a back axis is not allowed, Audi remains in a track.
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