Title: Axial fuel stratification of a homogeneous charge compression ignition (HCCI) engine

Authors: P.G. Aleiferis, A.G. Charalambides, Y. Hardalupas, A.M.K.P. Taylor, Y. Urata

Addresses: Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK. ' Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2BX, UK. ' Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2BX, UK. ' Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2BX, UK. ' Honda R&D Co., Ltd., Tochigi R&D Centre, Tochigi 321-3393, Japan

Abstract: Homogeneous charge compression ignition (HCCI) combustion is a method of internal engine combustion that incorporates principles from both spark ignition (SI) and compression ignition (CI) engines. The advantages of HCCI combustion are low NOx and soot emissions and high volumetric efficiency. Knocking at high loads is among the disadvantages of HCCI and fuel stratification can offer the possibility of reducing the knocking effect. In this study, infrared (IR) absorption was used to quantify the charge stratification in the engine, and pressure traces and fast camera images were acquired to investigate any variations between a strongly and a weakly stratified mixture.

Keywords: homogeneous charge compression ignition; HCCI; fuel stratification; n-heptane; infrared absorption; optical techniques; fast camera images; auto-ignition front development; pressure traces; knocking; high loads; nitrogen oxides reduction; soot reduction; emissions reduction.

DOI: 10.1504/IJVD.2007.013218

International Journal of Vehicle Design, 2007 Vol.44 No.1/2, pp.41 - 61

Published online: 12 Apr 2007 *

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