The Influence of Additives on the Size Distribution and Composition of Particles Produced by Diesel Engines

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Abstract
Measurements with different diesel engines and fuel additives permit a characterisation of the aerosol of a diesel engine under the influence of fuel additives. Combined with chemical analysis and gravimetry a clear picture of the size range and composition of the emitted particles is oblained. Emission factors computed by gravimetry and coulometry correlate well. A correlation is found between the minimum additive concentration needed to induce exhaust particles consisting of additive products, and the elemental carbon emission factor of the engines. It provides informalion for optimising the exhaust cleaning system.