BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car

BMW E39
+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Cooling systems, heating
- Power supply system and release
   + Power supply system
   + System of injection of the petrol engine
   - Power supply system of the diesel engine
      Turbocompressor
      System of recirculation of the fulfilled gases (EGR system)
      Device of heating of the fuel filter
      Removal of air from fuel system
      Check, removal and installation of the fuel locking valve
      Removal and installation of nozzles
      Check and adjustment of the moment of the beginning of injection
      Removal and installation of the inlet pipeline
   + System of production of the fulfilled gases
+ Engine electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment
+ System of onboard diagnostics

System of recirculation of the fulfilled gases (EGR system)

The fuel system of the diesel engine is equipped with system of the recirculation of the fulfilled gases (EGR system) allowing to reduce the content of oxides of nitrogen (N0x), dangerous to the environment, in the fulfilled gases. For this purpose a part of the fulfilled gases moves back in engine combustion chambers that it reduces temperature of combustion and, as a result, content of harmful substances.

The system is run by the DDE block which regulates amount of injectable fuel and processes signals of the sensor of the accelerator pedal, sensor of speed, the sensor of atmospheric pressure and temperature of cooling liquid. The control unit via the vacuum valve regulates a vacuum impulse to the EGR valve and watches the correct dosage of recirculation of the fulfilled gases. The EGR valve is in a final collector. At a low temperature of cooling liquid and need of increase in engine capacity, the fulfilled gases are not regenerated. The system of recirculation of the fulfilled gases does not demand leaving.