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.
New York, NY United States 10017
- TABACZYNSKI, R J
- Klomp, E D
- Publication Date: 1974-10
- Pagination: 11 p.
- TRT Terms: Exhaust gases; Internal combustion engines; Nitric oxide; Pollutants; Stratified charge engines
- Subject Areas: Highways; Safety and Human Factors;
- Accession Number: 00084060
- Record Type: Publication
- Report/Paper Numbers: SAE Paper No. 741171
- Files: TRIS
- Created Date: Apr 22 1975 12:00AM