Hyundai Elantra

since 2000-2004 of release

Repair and car operation

Elantr's Hyundai
+ Petrol engines 1,6, 1,8 and 2,0 of l
+ Diesel engine of 2,0 l
+ greasing System
+ cooling System
- Fuel system
   + Fuel system of petrol engines
   - Fuel system of diesel engines
      General information about system of injection of "Common Rail"
      Characteristics of system of injection
      Control injection of fuel
      Main injection of fuel
      Additional injection of fuel
      Reduction of toxicity of the fulfilled gases
      Fuel system Common Rail
      EDC control system
      Management of the 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 switching off
      Glow plugs
      Removal and nozzle installation
      Installation of the fuel pump of a high pressure
      Measuring instrument of a consumption of air (Air flow sensor – AFS)
      The sensor of temperature of cooling liquid (ECT)
      Sensor of provision of a camshaft (CMP)
      Sensor of an angle of rotation of a cranked shaft
      The sensor of pressure of fuel in the accumulator of a high pressure (RPS)
      Sensor of temperature of fuel (FTS)
      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
+ Coupling
+ Mechanical transmission
+ Automatic transmission
+ Power shafts, forward and back axes
+ Suspension bracket
+ Steering
+ Brake system
+ Body
+ air Central air
+ Electric equipment
Electric circuits

EDC control system

The electronic control system of the diesel EDC engine for Common Rail includes three big systems:

  1. Sensors for registration of parameters of an operational mode which transform various material parameters to electric signals.
  2. ECU for generation of target electric signals on the basis of signals from sensors and the set algorithm.
  3. Drives for transformation of target electric signals of ECU to mechanical parameters.

Sensor of frequency of rotation of a cranked shaft

1–constant magnet
3–engine case

4–metal core
6–gear rotor

Position of the piston in the cylinder of the engine is solving in definition of the moment of injection of fuel in the combustion chamber. As pistons through rods are rigidly connected with cranked shaft, the sensor of provision of a cranked shaft hands over to the control unit information concerning position of all pistons. The inductive sensor on angular speed defines frequency of rotation of a cranked shaft, and this important entrance variable is transferred to ECU.

The ferromagnetic rotor with 60 teeths is fixed on cranked to a shaft, thus on a rotor there is no 2 teeth. This interval is located in a certain situation in relation to a cranked shaft and position of the piston in the first cylinder. The sensor represents a constant magnet and a metal core with the inductive coil. When passing about a pole of the sensor of teeths of a rotor in it the sinusoidal tension which amplitude increases with increase in frequency of rotation of a cranked shaft is induced.

Sensor of provision of a camshaft

The camshaft operates inlet and final valves and less frequency of rotation of a cranked shaft rotates with frequency twice. At piston movement to the top dead point the provision of a camshaft specifies, what piston is in a step of compression or a release step.

The sensor of provision of a camshaft works at effect of the Hall. The short-term signal of the sensor reports ECU that the piston of the first cylinder passed to a compression step.

Temperature sensors

3–NTC resistor

Sensors of temperature are established in various places of the engine and intended for measurement of temperature of the cooling liquid, air arriving in the engine, engine oil and fuel coming back in a fuel tank. A basis of each sensor is the resistor which resistance changes depending on temperature with negative temperature factor (NTC). Power failure on the resistor through an analog digitizer (ADC) is transferred to ECU. The characteristic of the sensor is written down in memory of ECU as tension function.

Characteristic of the sensor of temperature (NTC)

Measuring instrument of a consumption of air

1–socket contacts
2–internal connections
3–electronic block
4–an opening for an air admission

5–sensor element
6–an opening for production of air

The system of injection of fuel is intended for exact dispensing of fuel depending on amount of arriving air at various power setting. The proper correlation of air and fuel is necessary for reduction of quantity of harmful substances in the fulfilled gases. It demands use of sensors which precisely register the actual stream of the air arriving in cylinders of the engine during every moment.

Accuracy of the sensor should not depend on pulsations, system of a retsirkulyatsiya of the fulfilled gases and temperature of air arriving in the engine. To these requirements there corresponds a measuring instrument of a consumption of air with a heated-up thin film. The micromechanical measuring system registers a stream of air and its direction.