NITROGEN OXIDE CONTROL WITH THE DELAYED-MIXING, STRATIFIED-CHARGE ENGINE CONCEPT

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

• TRT Terms: Air quality management; Carbon monoxide; Computer programming; Computer programs; Design; Diameter; Exhaust gases; Fuel air mixtures; Homogeneity; Hydrocarbons; Information processing; Internal combustion engines; Mathematical models; Mixing; Nitric oxide; Nitrogen oxides; Numerical analysis; Performance evaluations; Process control; Stratified charge engines; Vehicle power plants
• Uncontrolled Terms: Air fuel ratio; Design criteria; Experimental design
• Old TRIS Terms: Automobile engines; Homogenizing; Mixing procedures; Test engines
• Subject Areas: Design; Highways; Safety and Human Factors; Vehicles and Equipment;

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