CALCULATED NITRIC OXIDE EMISSIONS OF AN UNTHROTTLED SPARK IGNITED, STRATIFIED CHARGE INTERNAL COMBUSTION ENGINE

This paper presents a theoretical study of nitric oxide emissions from an unthrottled stratified charge, spark ignition engine. A three-region (generally rich, stoichiometric, and lean) combustion model was used, and the effects of the following variables were studied: 1. Excess air number of the rich mixture. 2. Percentage of the total fuel in the rich-mixture region. 3. Percentage of fuel burned stoichometrically. 4. Exhaust gas recirculation, percentage and distribution. Comparisons are made to both experimental results from a throttled engine and calculated results for an unthrottled engine with a homogeneous mixture. For illustrative purposes, an application of the model to a particular geometrical form of charge distribution is analyzed.

  • Corporate Authors:

    Society of Automotive Engineers

    485 Lexington Avenue
    New York, NY  USA  10017
  • Authors:
    • TABACZYNSKI, R J
    • Klomp, E D
  • Publication Date: 1974-10

Media Info

  • Pagination: 11 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00084060
  • Record Type: Publication
  • Report/Paper Numbers: SAE Paper No. 741171
  • Files: TRIS
  • Created Date: Apr 22 1975 12:00AM