Audi A4

Since 1994 of release

Repair and car operation



Audi А4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ Exhaust system
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
- Injection system
   + System of injection Motronic
   - System of injection MPI and MPFI
      Additional functions
      Knots of system of injection
      Functioning
      Adjustment by means of a ljambda-probe
      Infringements in work and self-diagnostics
      The self-help
      The visual control
      Check of knots
      Dismantle of separate details
      Cable throttle заслонки
      Inlet collector
      Idling adjustment
      Check of the fulfilled gases
      The help at malfunctions
+ Coupling
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics



Adjustment by means of a ljambda-probe

The catalyst can work effectively only in that case when the relative quantity of air l (лямбда) as much as possible comes nearer to 1. That it to receive, the system of ignition/injection MPI/MPFI is supplied by so-called ljambda-adjustment. Thus the ljambda-probe measures in the fulfilled gas quantity of oxygen – comparative size for definition of structure of a toplivno-air mix. If the measured size deviates from ideal the management block spends additional adjustment. Adjustment functions in a range from l=0,8 to l=1,2.

The ljambda-probe gives a suitable signal for use only at temperatures from above 350 С. Quickly to reach this temperature, the probe is warmed up by an electric way. Before the necessary temperature is reached, the system is not regulated and guided on the set average size l.

Six-cylinder model Audi with a drive on all wheels has two catalyticи converters and two ljambda-probes.