Abstract
Abstract: One way to achieve better performances from a Diesel engine is the continue improvement of injection process. Over the years, significant efforts have been made to predict the dynamic behaviour of the fuel injection system using computer simulations of the fuel injection system. Simulation can be especially helpful in gaining insight to the dynamic behaviour and interactions that are often not readily apparent from reading theory. The main goal of this thesis was to develop a physical, mathematical, numerical model, and a computer program using a modular approach to investigate the dynamic behaviour of the diesel fuel injection system. First, to different injection systems were investigated, using a special designed program. Different models for the components of injection systems were developed. The performance of the simulation program was evaluated trough comparison of the measured and the computed injection law for both systems. The good results were used to validate the developed program. At the end of the paper, conclusions and a few ideas of future improvements were high lined.
Keywords: Diesel fuel injection system, Injection Law, Injection Rate Measurement, Injection Law Shaping, Simulation, Cavitation inside Injection Nozzles.