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

Disk brakes

Together with everyone a wheel in an air stream the steel disk freely rotates. So-called supports sedloobrazno cover disks. When pressing a brake pedal pistons press brake slips to disks – there is a braking.

Disk brakes are constantly cooled with a counter flow of air. To the six-cylinder engine of 2,8 l there is an additional cooling of forward disk brakes: on perimeter of a brake disk big dredging which reject air settle down and thus strengthen cooling.

Disk brakes during wet weather

At an incessant rain barefaced brake disks intensively pour down therefore the brake effect is shown with delay in a fraction of a second. Moisture between brake disks and slips has to evaporate in the beginning. In the winter this phenomenon arises with a special force as the salt layer which settled on brake disks and slips when braking has to be erased in the beginning.