Effects of Control Parameters on Performance and Emissions of HSDI Diesel Engines: Investigation via Two Zone Modelling Effets des paramètres de contrôle sur les performances et les émissions de moteurs Diesel HSDI: étude au moyen de modélisation à deux zones

摘要: The paper deals with the development and experimental validation of a two zones combustion model of High Speed Direct Injection (HSDI) Diesel engines. The model is aimed to support the engine control design for common-rail Diesel engines with multiple injections, where the large number of control parameters (ie injection timing, injection dwell, rail pressure, etc.) makes the recourse to experiments extremely expensive, in terms of time and money. The modelling approach is based on a semi-empirical two-zone combustion model coupled with an intensive identification analysis, in order to implement a predictive tool for simulating the effects of control strategies on combustion and exhaust emissions. Fuel spray and combustion are simulated by dividing the combustion chamber into two control volumes, accounting for fuel jet and surrounding air. The fuel jet is further divided in two zones to separate liquid and …