In the non-turbocharged engine (1.8 D) this system includes:
- a thermal switch with a vacuum servomotor located on the thermostat housing, which switches off the exhaust gas recirculation when the engine coolant temperature is below 60°C;
- vacuum control valve located on the fuel pump;
- vacuum limiting valve;
- an exhaust gas recirculation valve located on the engine intake manifold that, under the action of a vacuum, opens or closes the connection between the exhaust manifold and the intake manifold. In a turbocharged engine (1.8 TD), the exhaust gas recirculation system is controlled by an electronic control device and includes;
- coolant temperature sensor located on the thermostat housing;
- electromagnetic vacuum valve located on the left front side of the engine compartment, this valve is exposed to the vacuum generated by the vacuum pump, the electromagnetic valve receives a voltage signal from the electronic control unit and makes it possible to supply vacuum to the exhaust gas recirculation valve servomotor;
- under the influence of vacuum, the diaphragm of the exhaust gas recirculation valve servomotor causes it to open, allowing exhaust gases to flow from the exhaust manifold into the intake manifold.
