Development of an engine simulation program and its application to stratified charge SI engines Online publication date: Mon, 18-Aug-2003
by H. Zhao, P. Calnan, N. Ladommatos, T. Ma,
International Journal of Vehicle Design (IJVD), Vol. 22, No. 3/4, 1999
Abstract: The paper presents the development of an engine simulation program and its application to the analysis of a spark ignition (SI) engine with stratified charge. The engine simulation program has been developed to predict engine combustion, auto-ignition, performance and emissions. Full NOx formation is included in the model with a refined method to calculate the equilibrium burnt gas composition. To predict the onset of knocking combustion, an auto-ignition model involving 31 different chemical reactions is included. The thermodynamic and auto-ignition models are coupled through cylinder pressure and unburned gas temperature. The inclusion of a geometry sub-model permits the modelling of SI engines with complicated cylinder head geometry. The model was then applied to a SI engine with stratified fuel or diluent. The effects of the charge stratification on engines combustion, performance and emissions are discussed.
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