Origins of Hydrocarbon and Carbon Monoxide Emissions From Diesel Engines

The paper considers the combustion regimes which lead to the emission of HC and CO in diesel combustion systems. Experimental data are presented to show the effect of a wide range of operating variables on the emission of HC and CO from a range of production automotive diesel engines. Analysis of the data shows that three localised sources account for most of the HC and CO emissions. The measures required to exploit the very low emissions potential of the diesel engine are discussed.