Sensors and actuators (actuators) of the injection system

The crankshaft position sensor is screwed into the cylinder block near the oil filter. It reports the engine speed to the control unit.

The camshaft position sensor for the 1.3 liter engine is screwed into the casing of the camshaft drive chain, and for 1.25 / 1.4 liter engines it is screwed into the cylinder head. It transmits the position of the engine to the control unit.

The throttle valve potentiometer transmits the angular position of the throttle valve to the control unit.

The idle switch provides the control unit with information about the throttle position corresponding to the idle mode.

The coolant temperature sensor is an NTC resistor, i.e. as the temperature rises, the resistance decreases.

The intake air temperature sensor is also an NTC resistor.

The fuel tank ventilation system consists of an activated carbon tank and a solenoid valve. Fuel vapors accumulate in the activated carbon tank, which are formed when the fuel in the tank is heated. When the engine is running, fuel vapors are sucked out of the coal tank and fed into the engine for afterburning.

Lambda probe (oxygen sensor) serves to control the catalyst. It detects the oxygen content in the exhaust gases and sends a corresponding voltage signal to the engine control unit.

The exhaust gas recirculation system directs a certain proportion of the exhaust gases into the intake air stream in accordance with the state of the engine. This reduces the temperature of the exhaust gases and reduces the concentration of nitrogen oxide in the exhaust gases.

The idle air control valve controls the amount of air flowing around the throttle during idle. This achieves a constant idle speed, regardless of whether additional consumers such as power steering or air conditioning compressor are switched on.