Audi 100/A6

1990-1997 of release

Repair and car operation

Audi 100/A6
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 3.2. Diesel engines
+ 3.3. Removal and partition of engines
+ 4. Cooling system
+ 5. Heating and ventilation
- 6. Fuel system
   + 6.1.2. Technical characteristics
   + 6.2. Multipoint system of injection of fuel
   - 6.3. System of injection of MPI/MPFI (6-cylinder engines)
      6.3.2. Technical characteristics
      6.3.3. Distinctions of systems of injection
      6.3.4. Sensors
      6.3.5. Idling regulation
      6.3.6. Removal and installation of klapanny nozzles
      6.3.7. Check of klapanny nozzles
      6.3.8. Oxygen sensor
   + 6.4. Power supply system of diesel engines
   6.5. Device of service of heating
   6.6. Diagnostics of malfunctions of system of heating
   6.7. Conditioner: not only "pluses", but also "minuses"
   6.8. Rules of service of the conditioner
+ 7. Exhaust system
+ 8. Systems of start, ignition
+ 9. Transmission
+ 10. Brake system
+ 11. Suspension brackets, steering
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice


6.3.5. Idling regulation


The LFR (Leerlauffullungs-regelung) valve of system of regulation of filling is attached to an inlet collector and regulates a consumption of air at work in an idling mode bypassing a butterfly valve. Thanks to it frequency of rotation of the cranked shaft, remaining a constant irrespective of is reached, whether such consumers of energy, as the pump of the amplifier of the steering mechanism or central air compressor are included. Management of the LFR valve is carried out by the electronic control unit of system of injection.

The inlet collector is executed so that soaked-up air with the help a zaslonok goes on long or on a short way. At frequency of rotation of a cranked shaft below about 4000 rpm of a zaslonka are closed, soaked-up air moves on a long way thereof the engine torque raises. At frequency of rotation of a shaft over 4000 rpm of a zaslonka open, soaked-up air goes on a short way thanks to what the capacity raises. The control unit of system of injection operates movement a zaslonok by means of the vacuum valve which turns on the membrane mechanism of a drive of a shaft a zaslonok.

The system of a retsirkulyatsiya of the fulfilled gases consists of mechanical and electric valves and serves for reduction of quantity of NOX in the fulfilled gases to the catalyst.

The electronic control unit is in the right niche for feet under plastic facing.

At works with systems of injection it is necessary to pay attention to faultless purity. Before demontazhy the corresponding details are necessary for clearing gasoline. The system is under a high pressure. Therefore before replacement of details for pressure decline in system it is necessary to turn on slowly топливопровод between the fuel pump and the filter. Previously to enclose under топливопровод a rag.

The high pressure decreases itself (without an otvorachivaniye топливопровода) in some hours after an engine stop.