Audi A4

since 1994 release

Repair and operation of the car

A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
- Brakes
   Independent work on brake system
   So the brake system works
   Check of brakes
   Brake fluid
   Check of level of brake fluid
   Check of brake system on tightness and existence of damages
   Replacement of brake fluid
   Disk brakes
   Measurement of thickness of overlays of forward disk brakes
   Check of a condition of brake disks
   Replacement of overlays of disk brakes
   Back disk brakes
   Measurement of overlays of back disk brakes
   Emergency brake
   Check of idling of the lever of the emergency brake
   Main brake cylinder
   Brake amplifier
   Check of the brake amplifier
   Works on hydraulics of brake system
   Pumping of brake system
   The help at malfunctions
   ABS and EDS
   What does ABS?
   Function of separate knots
   Electronic system of distribution of brake effort (EBV)
   Violations in work of ABS system
   Electronic blocking of differential (EDS)
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

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 number of turns controls delay of each back wheel and compares sizes of a lobby and a back axis. If when braking distinction between number of turns of lobbies and back wheels too big, 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.