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



Ljambda-regulation

Plug connections to a ljambda-probe:

1 – ljambda-probe heating;
2 – a ljambda-probe signal.

Katalitichesky neutralizer can is correct work only in the event that the factor of surplus of air l is probably closer to 1 that corresponds to a parity of fuel/air 14,7/1. That it was carried out in practice, the system of injection KE-III-Jetronic is supplied by so-called ljambda-regulation.

Thus the ljambda-probe measures quantity of oxygen in the fulfilled gases – comparative size for structure of a mix of fuel/air. If the indicator deviates from ideal, the management block gives the commission to a pressure regulator in the proof-reader of structure of a gas mixture immediately to change mix structure. Regulation works (any way-kolebatelno because only in this case каталитический neutralizer copes with almost full transformation of harmful substances) in a range from l = 0,8 to l = 1,2.

The ljambda-probe transmits a signal only after the temperatures exceeding 350С, therefore it электрически is warmed (in addition to temperature of the fulfilled gases). Until then while it will not reach the working temperature, the system is lagged behind noncontrollable and is guided by the set average factor. In the same way regulation occurs, if enrichment of a gas mixture in the conditions of full loading is activated.