Audi 80/Avant (B4)

Audi 80/Avant
The description
System of release of the fulfilled gases
Cooling system
Fuel tank and the fuel pump
The air filter and intake 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
      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
Transmission and transmission
Suspension bracket and steering
Brake system
Antiblocking system of brakes
Wheels and tyres
body electrosystem
Ignition system
Signalling devices
Devices and auxiliary devices
Heating and ventilation
Body elements
Search of malfunctions


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.