Measurement of diesel exhaust particle size distributions.

D. F. Dolan, D. B. Kittelson, K. T. Whitby

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


A technique is described for determining particle size distributions of diesel engines exhaust smoke using an electrical analyzer. Diesel smoke is a highly concentrated aerosol. As such, it is a dynamic undergoing rapid changes as a result of condensation and coagulation processes. Consequently, great care must be taken to prevent falsification when sampling this system. A dilution probe has been developed which rapidly dilutes an exhaust sample with clean air, effectively freezing condensation and coagulation processes. The diluted exhaust is collected in a teflon holding bag and subsequently analyzed. An electrical aerosol analyzer is used to determine the particle size distribution in the 0.0075 to 0.6MUm diameter size range. The data allow total aerosol volume concentrations and (assuming unity particle density) mass concentration to be determined as well. The exhaust from a turbocharged four-cycle direct injection diesel engine operating under a variety of conditions was sampled and analyzed using this system. Aerosol size distributions and concentrations are presented and discussed. (A)

Original languageEnglish (US)
Journal[No source information available]
Issue number75 -WA/APC-5
StatePublished - Jan 1 1975
EventUnknown conference -
Duration: Nov 30 1975Dec 5 1975


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