The air necessary for fuel combustion is sucked in through the air filter and compressed by the turbocharger, refer to Section Turbocharger.
The engine control device evaluates the signals from various sensors, calculates the amount of fuel injected and the injection timing based on the information received, and transmits the appropriate commands to the executive bodies. In this case, the control unit is coordinated with other vehicle systems, for example, with the transmission control system, air conditioning or vehicle blocking.
Pedal position sensor located on the gas pedal support. The position of the pedal is reported to the engine control unit via a potentiometer. The gas cable drive to the high-pressure fuel pump is not used, therefore there is a term "electronic gas pedal".
Air mass meter with built-in intake air temperature sensor measures the amount of intake air.
crankshaft pulse sensor measures the number of revolutions of the engine.
Injector Needle Displacement Sensor on one of the injectors determines the start of injection and regulates the injection process depending on the load and engine speed.
Boost pressure sensor measures the air pressure in the intake manifold. Its signals are used to limit the amount of injected fuel if the boost pressure control or the air quantity meter fail.
Exhaust gas recirculation system EGR, depending on the operating state of the engine, supplies a certain amount of exhaust gas to the engine intake duct through a controlled valve. Thus, the combustion temperature of the fuel is reduced. The lower this temperature, the lower the concentration of toxic substances in the exhaust gases.
Clutch pedal switch serves to eliminate shocks that occur when changing the mode and jerks when the clutch is engaged.
brake pedal switch serves to reset the engine speed to idle if the gas pedal position sensor is out of order and the driver brakes the car.
Due to the good starting characteristics of the direct injection engine preheat required mainly at temperatures below 0°C. Glow plugs are switched on from the control device via a relay.