Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
Over the next few decades the automotive industry will be faced with a number of challenging decisions as the world’s supply of oil reduces and the global population increases beyond 7 billion. These factors have driven some researchers to look at blending fossil fuels with alternatives such as crop-produced alcohols (or so-called biofuels). The currently reported study was concerned with the combustion characteristics of ethanol-isooctane blended fuels in a specially designed, single cylinder, spark ignition research engine equipped with full bore overhead optical access. The testing was undertaken using port fuel injection (PFI) and was focused on the behaviour of differing ethanol concentrations under varied internal exhaust gas re-circulation levels (IEGR). Simultaneous high speed imaging and in-cylinder pressure data analysis was used to understand the fundamental influence of varying ethanol content on turbulent flame propagation and subsequent mass burning. The resulting images were analysed looking at the speed of the advancing flame and the shape factor of the burning velocity. The initial evidence suggested that under the moderate speeds and loads tested, poor charge mixture preparation associated with ethanol was leading to fast but unstable burn rates. This could be avoided and combustion improved by using increased valve overlap settings, with the hot residuals entering the intake port aiding the full evaporation of the fuel.
Słowa kluczowe
Wydawca
Czasopismo
Rocznik
Tom
Strony
299--305
Opis fizyczny
Bibliogr. 8 poz., rys.
Twórcy
autor
- Brunel University Department of Mechanical Engineering Uxbridge, UB8 3PH, United Kingdom tel.: +44 1895 274000, fax: +44 1895 232806
autor
- Brunel University Department of Mechanical Engineering Uxbridge, UB8 3PH, United Kingdom tel.: +44 1895 274000, fax: +44 1895 232806
autor
- Brunel University Department of Mechanical Engineering Uxbridge, UB8 3PH, United Kingdom tel.: +44 1895 274000, fax: +44 1895 232806
Bibliografia
- [1] Aleiferis, P. G., et al., An Optical Study of Spray Development and Combustion of Ethanol, Iso-Octane and Gasoline Blends in a DISI Engine, SAE Paper 2008-01-0073, 2008.
- [2] Fleming, D., Chamberlin, S., Tradable Energy Quotas: A Policy Framework for Peak Oil and Climate Change, London: All-Party Parliamentary Group on Peak Oil, and The Lean Economy Connection, 2011.
- [3] Hedegaard, C., Available: http://news.bbc.co.uk/1/hi/programmes/hardtalk/7654563.stm, 2008, last accessed 08/06/2012.
- [4] Kar, K., et al., Measurement of Vapor Pressures and Enthalpies of the Vaporisation of Gasoline and Ethanol Blends and Their Effects on Mixture Preparation in an SI Engine, SAE Paper 2008-01-0317, 2008.
- [5] Karman, D., Ethanol Fuelled Motor Vehicle Emissions: A Literature Review, Air Health Effects Division, Health Canada 2003.
- [6] Pearson, R. J., et al., Extending the Supply of Alcohol Fuels for Energy Security and Carbon Reduction, SAE Paper 2009-01-2764, 2009.
- [7] Varde, K. S., Manoharan, N. K., Charaterization of Exhaust Emissions in an SI Engine Using E85 and Cooled EGR, SAE Paper 2009-01-1952, 2009.
- [8] Wallner, T., Frazee, R., Study of Regulated and Non-Regulated Emissions from Combustion of Gasoline, Alcohol Fuels and their Blends in a DI-SI Engine, SAE Paper 2010-01-1571, 2010.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-8d427002-bae4-4dd6-a541-87810d72878d