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The Influence of Fuel Composition on Pollutant Emission of Premixed Spark Ignition Engines in Presence of EGR
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Abstract
A fuel matrix consisting of twelve gasolines was tested in presence of Exhaust Gas Recirculation (EGR). The fuels have different percentages of aromatics (20÷35% vol.), olefins (5÷15% vol.) and oxygen (0÷2% wgt). Four different oxygenated compounds (MTBE, ETBE, TAME, DIPE) were chosen as additives.
Tests were carried out on a MPI premixed spark ignition engine at steady operating conditions (2000 rpm, 2 bar BMEP, 13.5% EGR) and stoichiometric air/fuel ratio. Regulated and unregulated pollutants were measured upstream the catalytic converter. Cyclic variation of Indicated Mean Effective Pressure (IMEP) in presence of EGR was also evaluated.
The adoption of EGR increases PAH and aldehydes emissions, and decreases benzene emissions of unoxygenated fuels. Conversion efficiencies of CO and of total HC are lowered by EGR. An increase of aromatics content in an unoxygenated fuel leads to higher engine out NOx emission. This effect is reduced if MTBE is added. In presence of EGR, the addition of oxygenated compounds as MTBE, ETBE, TAME, DIPE reduces 1-3 butadiene emission but it can increase aldehydes.
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Diana, S., Giglio, V., Iorio, B., and Police, G., "The Influence of Fuel Composition on Pollutant Emission of Premixed Spark Ignition Engines in Presence of EGR," SAE Technical Paper 982621, 1998, https://doi.org/10.4271/982621.Also In
References
- US Auto/Oil Air Quality Improvement Research Program II SAE Publication
- US Auto/Oil Air Quality Improvement Research Program III SAE Publication
- European Programme on Emissions, Fuels, and Engine Technologies ACEA & Europia July 1995
- “Effect of Fuel Qualities and Related Vehicle Technologies on European Vehicle Emissions” Report of European Auto-Oil Programme Technical Group 1 European Commission February 1994
- Le Jeune A. McDonald C.R. Lee R.G. “NOx Aromatics Effects in Catalyst-Equipped Gasoline Vehicles” SAE Paper 941869
- Goodfellow C.L. Gorse R.A. Jr Hawkins M.J. McArragher J.S. “European Programme on Emissions, Fuels, and Engine Technologies (EPEFE) - Gasoline Aromatics/E100 Study” SAE Paper 961072
- McDonald C.R. Morgan T.D.B. Graupner O. Wilkinson E. “The Independent Effects of Fuel Aromatic Content and Mid-Range Volatility on Tailpipe Emissions from Current Technology European Vehicle Fleets” SAE Paper 962026
- Graupner J.O. Lange W.W. Kostka J. König A. “Interaction Between Gasoline Properties and Engine Management System and Effects on 3-Way Catalyst Efficiency” SAE Paper 972839
- Heywood J.B. “Internal Combustion Engines Fundamentals” McGraw Hill International Editions 1988
- International Agency for Research on Cancer Monographs 46 “Diesel and Gasoline Engine Exhausts and Some Nitroarenes” 1989