Title: Development of an engine simulation program and its application to stratified charge SI engines

Authors: H. Zhao, P. Calnan, N. Ladommatos, T. Ma,

Addresses: Dept. of Mechanical Engineering, Brunel University, Uxbridge UB8 3PH, England, UK. Dept. of Mechanical Engineering, Brunel University, Uxbridge UB8 3PH, England, UK. Dept. of Mechanical Engineering, Brunel University, Uxbridge UB8 3PH, England, UK. Ford Motor Company, UK

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 NO_x 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.

Keywords: modelling; SI engine; stratified charge; engine simulation program.

DOI: 10.1504/IJVD.1999.001864

International Journal of Vehicle Design, 1999 Vol.22 No.3/4, pp.159-194

Published online: 18 Aug 2003 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article