Emission data were developed from a sample of resident vehicles in Leadville, Colo. at a nominal elevation of 10,000 ft. above sea level. Emissions-concentration sampling was performed on each vehicle in the sample at loaded and unloaded engine operating conditions. Concentration data were then converted to mass data using equations developed from keymode and mass emissions testing of vehicles operating in the Denver area. Mass emissions data were then combined with mass data developed from vehicles operating in a metropolitan area situated near sea level (Chicago) to define the emissions versus altitude relationships for exhaust hydrocarbons (HC), CO, and NOx. Both mass CO emissions and CO emissions at idle were found to be lower from 1967 and older model-year vehicles operating in the Leadville area than from a similar sample of vehicles operating in the Denver area. A minimum HC/CO idle emission standard appears to be impractical for statewide application. /GMRL/

  • Corporate Authors:

    Slocum Publishing Company Incorporated

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Sorrels, D E
    • Liljedahl, D R
    • Terry, J L
  • Publication Date: 1974-10

Media Info

  • Pagination: 12 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00096080
  • Record Type: Publication
  • Report/Paper Numbers: SAE Paper No. 741033
  • Files: TRIS
  • Created Date: Aug 13 1975 12:00AM