Opel Omega

since 1993-1999 of release

Repair and car operation

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. Diesel engine in volume 2,0 liters
   - 5.3. Diesel V6 2,5-liter engine
      5.3.1. Principle of operation of the diesel engine
      5.3.2. Turbokompressor
      5.3.3. System of a retsirkulyatsiya 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. Air removal from a power supply system
      5.3.8. Fuel pump of a high pressure (TNVD)
      5.3.9. Nozzles
      5.3.10. Check / adjustment of the beginning of 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. Ignition system
+ 8. Coupling
+ 9. Transmissions
+ 10. Main transfer, semi-axes
+ 11. Brake system
+ 12. Suspension bracket and steering
+ 13. Body
+ 14. Body electric equipment

5.3.2. Turbokompressor


The diesel OMEGA engine is equipped with a turbokompressor. In a turbokompressor both turbine wheels are located on one shaft, but in cases independent from each other. Turbine wheels are put in action by exhaust gases. Wheels rotate a shaft with a speed to 120 000 rpm. As an exhaust and soaking-up rotor are on one shaft, fresh air is pumped in cylinders with constant speed of rotation.

Owing to high volume efficiency (efficiency) the capacity gain in such engines makes to 100 %. The increase in capacity is influenced by pressure of pressurization which in engines of cars lies in limits from 0,4 to 0,8 bar (pressure in tires about 1,8 bar). If pressure of pressurization exceeds the value established by the manufacturer, perepuskny the valve in this case opens, and pressure decreases.

Along with engine capacity existence of a turbokompressor raises also a torque that first of all well influences smoothness of operation of the engine. Unlike petrol engines because of pressurization in diesel engines it is not required to lower a compression as and on low turns injected fuel completely is developed.

Turbokompressor is an element which should work with high precision. Therefore to repair it it is recommended only to the expert. As a rule, in case of malfunction of a turbokompressor it is replaced in a set.