Smokemeters or opacity meters give a gross or optical indication of particle number density in diesel engine exhaust emissions; however, due to the small size of typical diesel exhaust particulates, it is difficult to collect size distributed samples except for the largest sizes. The inertial impactor used to obtain the data reported in this paper collected the majority of the particulates on a back-up filter with no inherent size differentiation. Because wear particles are larger in size, it is possible to obtain a visual idea of the particle size distribution from a ferrogram slide by means of optical microscope analysis. In all of the particle studies reported, it was necessary to work with the scanning electron microscope to obtain magnifications necessary to achieve physical characterization, and for even greater resolution, in the case of exhaust particulates, it was necessary to use the transmission electron microscope.

  • Supplemental Notes:
    • For Meeting held June 15, 1977.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Scofield, G L
  • Publication Date: 1977

Media Info

  • Features: References;
  • Pagination: 20 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00184646
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: n 780426 Preprint
  • Files: TRIS
  • Created Date: Dec 29 1978 12:00AM