Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car

Audi 80/Avant
- Technical specification
   15-inch wheels
   Brake system
   Passive safety
   Four-wheel drive
   Distributive Torsen-differential
   Dynamics of the movement at a dry paving
   Instructions on operation for all-wheel drive cars
   Blocking of differential of the back bridge
   Motor compartment
   Regular servicing
   Organization of a workplace
   Lubricant works
   Oil consumption
   Right choice of engine oil
   Replacement of engine oil and oil filter
   Check of level of working liquid of the power steering
   Check of level of oil of the mechanical transmission
   Check of level of oil in the drive of the back bridge
   Control of the ATF level in the automatic transmission
   Check of level of oil in the main transfer of the automatic transmission
   ATF replacement
   Lubricant of hummock drives, hinges and locks
+ Engines
+ System of production of the fulfilled gases
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
+ Signaling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications

Blocking of differential of the back bridge

The differential of the back bridge on all-wheel drive cars is supplied with blocking of differential, dependent on speed. Blocking gives the chance to both back wheels to rotate with an identical frequency, that is prevents a provorachivaniye of one separate wheel.

All this thought as the device increasing coupling of a wheel with the road if the car got stuck in snow or dirt therefore blocking is automatically turned off at a speed over 25 km/h.

In the standing car blocking of differential joins the switch on the central console. The executing body is the control unit located under a back seat which releases the vacuum pipeline leading to blocking or, on the contrary, closes it at a speed over 25 km/h. Depression proceeds from the inlet pipeline of the engine.

Under a back seat there are also elements of the four-wheel drive; for example, the control unit of blocking of differential (1) and the accelerating switch (2) for anti-blocking system which is built in only on all-wheel drive cars.