Hyundai Elantra
Petrol engines 1,6, 1,8 and 2,0 l
The diesel engine of 2,0 l
Greasing system
Cooling system
- Fuel system
    Fuel system of petrol engines
   - Fuel system of diesel engines
      The general data on injection system Common Rail
      Characteristics of system of injection
      Control injection of fuel
      The main injection of fuel
      Additional injection of fuel
      Reduction of toxicity of the fulfilled gases
      Fuel system Common Rail
      Control system EDC
      Management of a maximum quantity of air arriving in the engine
      The active shock-absorber reducing fluctuations of frequency of rotation of a cranked shaft of the engine
      Engine deenergizing
      Candles накаливания
      Removal and atomizer installation
      Installation of the fuel pump of a high pressure
      Measuring instrument of the expense of air (Air flow sensor – AFS)
      The gauge of temperature of a cooling liquid (ECT)
      The gauge of position of a camshaft (CMP)
      The gauge of an angle of rotation of a cranked shaft
      The gauge of pressure of fuel in the high pressure accumulator (RPS)
      The gauge of temperature of fuel (FTS)
      The valve of adjustment of pressure
      Search and elimination of malfunctions
Monitoring systems and decrease in toxicity of the fulfilled gases
Ignition system
System of preliminary heating of the diesel engine
Mechanical transmission
Automatic transmission
Power shafts, forward and back axes
Suspension bracket
Brake system
Air central air
The electric equipment
Electric schemes

Reduction of toxicity of the fulfilled gases

Formation of a fuel mix and combustion process

– Pressure of injection;
– Injection time;
– Aerosol distribution (number of a spray, a profile of a sprayed stream, a direction of a sprayed stream);
– The moment of injection of fuel;
– Air movement;
– Quantity of air.

These factors influence allocation by the engine of harmful substances and the fuel expense. Heats of combustion and high levels of concentration of oxygen lead to increase in formation NOx. Soot allocation increases at reduction of quantity of air and insufficient formation of a fuel mix.

Criteria of the engine

The configuration of the chamber of combustion and the air inlet channel can positively influence reduction of issue of the fulfilled gases. If air moving to the combustion chamber is carefully co-ordinated with fuel jets and sprays that promotes effective mixing of air and fuel, full combustion впрыснутого fuel is reached. Besides, positive effects of homogenization of a mix of air and the fulfilled gas cooled in path EGR are reached. Use of four valves on the cylinder and турбокомпрессора with the turbine of variable geometry (VTG) also promotes reduction of toxicity of the fulfilled gases and increase of specific capacity.

The moment of injection of fuel

Reduction of temperature of combustion and delay of process of injection of fuel lead to reduction of maintenance NOx in the fulfilled gases. However, if these parametres are considerably reduced, maintenance HC in the fulfilled gases and the fuel expense, also as well as soot allocation increases at high loadings by the engine.

If the moment of injection of fuel deviates only on 1 (a cranked shaft) from optimum value, maintenance NOx can increase on 5 %, in view of that the deviation on 2 (a cranked shaft) towards an advancing of the moment of injection can lead to pressure increase in cylinders of the engine to 10 bar, and a deviation on 2 (a cranked shaft) towards delay can increase on 20 temperature of the fulfilled gases. Such high sensitivity demands limiting accuracy at adjustment of the moment of injection of fuel.

Fuel dispersion

Melkodispersnoe dispersion of fuel promotes effective mixing of air and fuel. It brings the considerable contribution to reduction of allocation of soot and HC. The High pressure of injection and an optimum geometrical configuration of an aperture of a spray lead to good dispersion of fuel.

For an exception of occurrence of a visible exit of soot the quantity of injected fuel should be limited according to quantity of air arriving in the engine. It demands giving of superfluous air, at least, on 10... 40 % (X =1,1... 1,4). After closing of a needle of a spray the fuel which has remained in an aperture of a spray, evaporates and leads to increase in allocation HC. It means that such harmful volumes should be shown to a minimum.