Opel Omega

since 1993-1999 release

Repair and operation of the car

Opel Omega
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Repair of engines
+ 4. Heating system and ventilation
- 5. Fuel, exhaust systems
   + 5.1. Petrol engines
   + 5.2. 2,0 liters diesel engine
   - 5.3. Diesel V6 engine of 2,5 liters
      5.3.1. Principle of operation of the diesel engine
      5.3.2. Turbocompressor
      5.3.3. System of recirculation of the fulfilled gases (EGR system)
      5.3.4. Device of preheat of diesel engines
      5.3.5. System prednakala/glow plugs
      5.3.6. Relay of system of preheat
      5.3.7. Removal of air from a power supply system
      5.3.8. Fuel Pump of High Pressure (FPHP)
      5.3.9. Nozzles
      5.3.10. Check / adjustment began giving of TNVD
      5.3.11. Inlet collector
      5.3.12. Main malfunctions of diesel system of injection
      5.3.13. System of production of the fulfilled gases of diesel engines
+ 6. System of start of the engine
+ 7. System of ignition
+ 8. Coupling
+ 9. Transmissions
+ 10. Main transfer, half shafts
+ 11. Brake system
+ 12. Suspension bracket and steering
+ 13. Body
+ 14. Body electric equipment


5.3.3. System of recirculation of the fulfilled gases (EGR system)


The diesel fuel system is supplied with system of recirculation of the fulfilled gases (EGR) for reduction of content of nitrogen oxides (Nox) in the fulfilled gases. A part of exhaust gases comes back in the engine to reduce temperature of combustion and thanks to it to reduce harmful impurity in exhaust gases.

The system is regulated by the DDE monitor at the increased amount of injectable fuel, on a signal from the sensor of the accelerator pedal, the sensor of speed, the sensor of atmospheric pressure and the sensor of temperature of cooling liquid. The monitor by means of the vacuum adjusting valve operated by the EGR valve correctly doses the fulfilled gas. The EGR valve is on an inlet collector. At the lowered temperature of cooling liquid or if load of the engine is high, the fulfilled gases do not come back. The system of recirculation of the fulfilled gases does not demand frequent service.