Optimization of the Intake System on Diesel Engines Featuring a High Pressure Injection System

Combustion in Diesel engines is controlled by the interaction between fuel jet and mean and turbulent flow field. Therefore, the use of novel fuel injection strategies should be always integrated with the optimisation of the mean and turbulent flow field within the cylinder. While in the last years injection system technology has evolved at an impressive rate, establishing new standards, the development of design criteria for intake ports, ducts and plenums is not keeping the same pace. The authors believe that a substantial work should be carried out in this field. For this purpose numerical simulation should play a fundamental role to cut development time, as well as to gain a better understanding of the complex thermo-fluid-dynamics phenomena occurring within the engines.This paper reviews the fundamentals of the experimental and theoretical work carried out at DIMEC-University of Modena and Reggio for supporting the development of more efficient HSDI Diesel engines.