The paper discusses an EPA project the objectives of which are to: 1) define on-road emissions from heavy-duty diesel vehicles (HDDVs); 2) assess agreement between engine and chassis dynamometers and on-road emission factors; 3) evaluate current conversion factors for dynamometer data and develop appropriate ones if needed; and 4) develop a model emissions model. The experimental approach involves on-road tests that develop the model data necessary to model the emissions as a function of speed, load, grade, and acceleration. These data are fitted to routes representing transurban interstate travel, terminal entry/exit, and urban delivery. A final test sequence utilizes a certification cycle that has been adapted to suit actual truck operational capability to develop data for direct comparison with the dynamometer data.

  • Corporate Authors:

    Acurex Environmental Corporation

    555 Clyde Avenue, P.O. Box 7044
    Mountain View, CA  United States  94039
  • Authors:
    • Harris, D B
    • King, F G
    • BROWN, E
  • Publication Date: 1995


  • English

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00726785
  • Record Type: Publication
  • Report/Paper Numbers: EPA-600-A-95-138
  • Files: TRIS
  • Created Date: Oct 19 1996 12:00AM