Radiator for exhaust gas recirculation
The Euro 5 limits are not exceeded thanks to the combination of cooled exhaust gas recirculation (EGR) and charging with intercooling.
The effect of exhaust gas recirculation is mainly due to the fact that the exhaust gas has a greater heat capacity and lower oxygen content than air. This reduces the combustion temperatures in the cylinder. Temperatures reduced even further by cooling of the exhaust gas and the charge air.
Since the formation of NOx depends exponentially on these temperatures, a combination of cooled exhaust gas recirculation and charging with intercooling enables the limits of the Euro 5 standard to be met. Efficient intercooling and exhaust gas cooling have a positive influence on both NOx formation in the combustion chamber and fuel consumption.
