Cylinder-to-cylinder mixture ratio distributions were measured for both the injected and carbureted versions of the AVCO-Lycoming 0-320 engine to determine the effects of non-uniform distribution of the exhaust emissions of carbon monoxide, hydrocarbons, and oxides of nitrogen. Data for both normal and leanout conditions were obtained. An experimental Turbulent Flow Manifold for the carbureted engine was tested as a potential means for improved cylinder-to-cylinder distribution. Results showed improvements for the low power operating modes but deterioration for the high power modes. An analysis based on test results predicts that the EPA emission requirements can be met, for this engine, by improving mixture distribution and leaning both the taxi-out and approach modes. Improvements in fuel economy are also predicted.
Influence of mixture distribution on emissions from an aircraft piston engine
Einfluss der verschiedenen Gemischverteilungen in den Emissionen von Flugzeugkolbentriebwerken
US Government Reports ; Okt ; 1-83
1980
83 Seiten
Report
English
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