EFFECTS OF LOW AMBIENT TEMPERATURE ON THE EXHAUST EMISSIONS AND FUEL ECONOMY OF 84 AUTOMOBILES IN CHICAGO

This report describes the results of a project in which pairs of tests were conducted in 84 in-use passenger cars, once under low temperature conditions (16 F to 57 F), and again under standard laboratory conditions. Each sequence included the 1975 Federal Test Procedure (exhaust emissions only), the Highway Fuel Economy Test and three short cycle tests. The vehicles were randomly obtained, tested in a 'as-received' condition, and work was performed between January and March 1978. Results show that HC and CO are most sensitive to cold temperature, while NOX is affected only slightly. Fuel economy suffered by an average of 7%, Vehicle fleets from manufacturers which used different control technologies were found to behave considerably differently at low temperatures.

  • Corporate Authors:

    Environmental Protection Agency

    Technology Assessment and Evaluation Branch
    Ann Arbor, MI  United States  48105
  • Authors:
    • Heinmiller, W
  • Publication Date: 1978-10

Media Info

  • Pagination: 25 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00191225
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: 78-3 Tech. Rpt.
  • Files: TRIS
  • Created Date: May 11 1979 12:00AM