Properties of Exhaust Particles from Modern PowertrainTechnologies

Authors

Priv.-Doz. Dr. R. Vogt, Dipl.-Ing. V. Scheer, Dr. U. Kirchner, Dipl.-Ing. M. Bergmann, Ford Research Centre, Aachen

Year

2007

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 639

Summary

In recent years it has become quite clear that exhaust particles may consist of two types of particles, the soot particles with a number count maximum at 40-90 nm, and 10-20 nm sized particle droplets, so called nucleation mode particles. The chemical and physical properties of exhaust particles, including modern diesel technology with diesel particle filter, and advanced DI gasoline are described. The origin of nucleation particles and their chemical composition is presented. The important factor of fuel sulfur for nucleation particle formation in light duty diesel exhaust is shown, while for heavy-duty diesel engines organic compounds play a more important role. Nucleation particles are shown to be volatile droplets, with no solid cores.

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