Audi 80/Avant (B4)

Since 1991-1995 of release

Repair and car operation



Audi 80/Avant
+ The description
+ Engines
+ System of release of the fulfilled gases
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and воздухозаборные channels
- Injection system
   + System of injection Mono-Motronic
   + System of injection Digifant
   - System of injection KE-III-Jetronic
      Basic elements
      Operating procedure
      Ljambda-regulation
      Malfunctions and independent diagnostics
      Independent repair
      Visual check
      Check of separate elements
      Search of malfunctions
      Removal of components
      Check of a mode of idling and the analysis of exhaust gases
      The list of malfunctions
   + Systems of injection MPI and MPFI
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Antiblocking system of brakes
+ Wheels and tyres
+ Kuzovnaja electrosystem
+ Ignition system
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications



System of injection KE-III-Jetronic

Multidot injection

The engines equipped with system of injection of gasoline, pull together pure air. In addition to it the injection system doses out fuel for each cylinder. At models it occurs to the 5-cylinder engine constantly (kontinuierlich) and management of the given process is carried out электронно (elektronisch), therefore our system of injection has received name KE-III-Jetronic.

Action principle

The primary form of this system of injection, K-Jetronic, worked purely mechanically by a principle «a lot of inlet air – a lot of fuel». And such simple devices as a regulator of enrichment of a gas mixture at warming up of the engine and the starting valve, in addition provided приспосабливаемость to difficult service conditions. To combine ljambda-regulation (with regulated catalytic neutralizer) with classical system K-Jetronic without additional devices it was impossible.

This circumstance has served as the main reason for the further working out KE-Jetronic. Basic elements of former system remained and have been added by the electronic block of management and a so-called regulator of pressure – in addition influencing fuel dispensing by regulating body with an electromagnetic drive. The pressure regulator is active mainly during engine warming up, however it also carries out the central function at regulation of structure of a gas mixture through ljambda-regulation (regulated каталитический neutralizer).

Together with completely electronic system of ignition «VEZ» (the ignition System is considered in the head) this system of injection represents a full control system of the engine. Though each system is supplied by own block of management, between them there is a data exchange. Besides, as sources of the information for ignition and injection systems the same gauges often serve.

The store of malfunctions which is writing down malfunctions during movement, finishes electronics possibilities. Memory of the store of malfunctions can be interrogated for an establishment of the reason of malfunctions.