FORMATION OF HYDROCARBONS AND OXIDES OF NITROGEN IN AUTOMOBILE ENGINES

The basic mechanisms responsible for the production of nitrogen oxide and hydrocarbon emissions from automotive spark-ignition engines are reviewed. It is shown how the formation of nitric oxide is rate controlled in the high-temperature burned gases inside the engine cylinder. A mathematical model which predicts nitric oxide emissions for given engine design and operating variables is then described. In contrast, the hydrocarbons are formed when the flame quenches at the cylinder head and piston walls. The magnitude of these quench layers and crevices and the boundary layer aerodynamics by which the hydrocarbon-rich gases exit the cylinder are discussed. /Author/

  • Availability:
  • Supplemental Notes:
    • Presented at the Symposium on Science in the Control of Smog, Calif. Inst. of Tech., Pasadena, Calif., Nov. 1971.
  • Corporate Authors:

    American Chemical Society

    1155 16th Street, NW
    Washington, DC  United States  20036
  • Authors:
    • Heywood, J B
    • Keck, J C
  • Publication Date: 1973-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00099585
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Report/Paper Numbers: HS-012 704
  • Files: HSL, TRIS
  • Created Date: Nov 5 1975 12:00AM