Diesel Ultrafine/Fine Particle Emissions in Numbers: Statistical Modeling and Evaluation of Engine Operating Variables

This work aims to develop statistical models for ultrafine/fine particle number emission rates from a diesel bus, to evaluate the explanatory power of engine operating variables. Emissions were recorded by using on-board instrumentation in two types of real-world driving conditions: a freeway commuting route and a within-city-limits bus route, with stop and go due to intersections and bus stops. To reduce the risk of drawing spurious conclusions, three replications of the experiment were performed and linear models were estimated using the robust-to-outliers quantile regression method. The set of explanatory covariates examined includes engine speed, engine load percentage, fuel to air ratio, injection pressure, boost pressure and exhaust temperature; statistical models were corrected for variations in ambient temperature.

  • Record URL:
  • Supplemental Notes:
    • This research was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
  • Corporate Authors:

    Cornell University

    School of Civil and Environmental Engineering
    Ithaca, NY  United States  14853

    University Transportation Research Center

    City College of New York
    Marshak Hall, Suite 910, 160 Convent Avenue
    New York, NY  United States  10031
  • Authors:
    • Kamarianakis, Yiannis
    • Gao, Huaizhu Oliver
  • Publication Date: 2009-12-10


  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Figures; References; Tables;
  • Pagination: 51p

Subject/Index Terms

Filing Info

  • Accession Number: 01152931
  • Record Type: Publication
  • Report/Paper Numbers: Report No. 49777-33-19
  • Files: UTC, TRIS
  • Created Date: Mar 22 2010 11:37AM