Potential of HCCI concepts for DI diesel engines
by A. Wimmer, H. Eichlseder, M. Klell, G. Figer
International Journal of Vehicle Design (IJVD), Vol. 41, No. 1/2/3/4, 2006

Abstract: Several alternative combustion processes are being studied as options for reducing the emissions of nitrogen oxide (NO_x) and soot of direct injection (DI) diesel engines. Such processes are characterised by adequate combustion control that helps to avoid areas of high local flame temperatures, which lead to NO_x formation, and fuel rich combustion areas which promote soot formation. In most cases, this will be achieved by a complete or partial charge homogenisation prior to combustion. Four processes of alternative combustion control have been applied to a single-cylinder research engine and compared to conventional diesel combustion. By means of adequate measurement techniques and engine cycle simulation, the combustion processes were subjected to an exact thermodynamic analysis in terms of mixture formation, combustion and wall heat transfer and assessed for their potential relating to emissions, efficiency and load limits.

Online publication date: Thu, 04-May-2006

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