The purpose of this study is to explore methods of controlling the nitrogen oxide emissions from internal combustion engines. From computer calculations, the delayed mixing stratified charge engine concept was selected. In the delayed mixing stratified charge engine concept, combustion is initiated and completed in a fuel-rich region, then air is mixed into those rich products. A study of existing engines shows that some operational stratified charge engines limit nitrogen oxide emissions in a manner similar to the delayed mixing concept. A single cylinder engine was modified to include an air injection valve. When air was injected after rich combustion, the nitrogen oxide emissions were lower, the hydrocarbon emissions were lower, the carbon monoxide emissions were about the same and the efficiencies were lower than for homogeneous operation at the same overall fuel-air ratio.

  • Corporate Authors:

    University of Wisconsin, Madison

    Department of Mechanical Engineering and Statistics
    Madison, WI  United States  53706

    Environmental Protection Agency

    Emission Control Technology Division, 2565 Plymounth Road
    Ann Arbor, MI  United States  48105
  • Authors:
    • Evers, L W
    • Myers, P S
    • Uyehara, O A
  • Publication Date: 1976-7

Media Info

  • Pagination: 267 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00166292
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: EPA/460/3-76/022
  • Contract Numbers: EPA-R-803858-01-0
  • Files: TRIS
  • Created Date: Sep 20 1978 12:00AM