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
   - Systems of injection MPI and MPFI
      Operating procedure
      Ljambda-regulation
      Malfunctions and independent diagnostics
      Independent repair
      Visual check
      Check of separate elements
      Removal of elements
      Trosovyj drive of "gas"
      Check of a mode of idling and the analysis of exhaust gases
      The list of malfunctions
+ 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

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 fuel/air parity 14,7:1. That it was carried out in practice, systems of injection MPI/MPFI are supplied by so-called ljambda-regulation. Thus the ljambda-probe measures quantity of oxygen in the fulfilled gases – comparable size for structure of a mix of fuel/air. If the indicator deviates from ideal, the management block regulates mix structure.

Regulation works in a range from l = 0,8 to l = 1,2, and fluctuations of this value are welcomed, because only in this case каталитический neutralizer copes with almost full transformation of harmful substances.

The ljambda-probe transmits a signal only after the temperatures exceeding 350С. That this temperature range was reached as soon as possible, the probe is warmed электрически. Until then while the probe will not reach the working temperature, the system is lagged behind noncontrollable and is guided on the set average factor.

As you have already guessed: 6-cylinder Audi it is supplied by two catalyticи neutralizers and also two ljambda-probes.