Influence of high and low pressure EGR and VGT control on in-cylinder pressure diagrams and rate of heat release in an automotive turbocharged diesel engine

► Experimental comparison of HP and LP EGR in six part load operating conditions. ► Simultaneous application of HP and LP EGR and VGT opening degree control. ► Variations of EGR fraction, intake pressure and mass flow rate in the tested modes. ► Influence of EGR and VGT control on in-cylinder pressure and heat release curves. ► Pressure diagrams and ROHR effects on engine fuel consumption, NOx and soot emissions.