LEAN COMBUSTION AND THE MISFIRE LIMIT IN SPARK IGNITION ENGINES
A study was undertaken to understand what causes very lean mixtures to misfire in engines. Results showed that leaner operation was possible with improved mixture preparation, increased airflow, decreased nitrogen (N2) dilution, increased compression ratio, increased mixture temperature, decreased engine speed, more central spark location, and multiple spark plugs. The dominant factors responsible for these effects were mixture homogeneity, charge dilution, and charge temperature. In most cases, at the lean limit the combustion duration (in crank angle degrees) reached a limiting value. The significance of these findings together with the exhaust emission and fuel consumption results are presented and discussed.
New York, NY USA 10017
- Quader, A A
- Publication Date: 1974-10
- Pagination: 20 p.
- TRT Terms: Automotive engineering; Combustion; Energy; Fuel air mixtures; Fuel consumption; Pollutants; Spark ignition engines; Spark plugs
- Subject Areas: Energy; Highways; Safety and Human Factors;
- Accession Number: 00084975
- Record Type: Publication
- Report/Paper Numbers: SAE Paper #741055
- Files: TRIS
- Created Date: May 1 1975 12:00AM