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Effects of Ethanol Addition in RON 95 Gasoline on GDI Stratified Combustion
Technical Paper
2011-24-0055
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The aim of this work is to study the effect of ethanol/gasoline blends on stratified operation in a single-cylinder GDI engine and to build up a large database that will be used to improve engine simulation codes. The effects of three different fuel blends are compared: a reference RON 95 fuel without oxygenates, E20 with 20% in volume of ethanol added to the RON 95 fuel, and E85 corresponding to 85% of ethanol added to the RON 95 fuel. The engine was equipped with a centrally-mounted piezoelectric injector. A wide range of engine speed and load operating conditions were studied: from 1000 to 4000 rpm and from 1.5 to 9 bar IMEP. Injection strategies were optimized using up to three injections per working cycle. It was shown that multi-injection is necessary to improve stratified combustion stability and to limit particulate emissions. Main effects of ethanol addition in gasoline are increasing laminar flame speed, lowering adiabatic flame temperature and elevating the latent heat value of the fuel. It was shown that ethanol addition leads to limited particulate emissions. It also has a positive effect on exhaust NOx emission reduction. For higher loads, exhaust CO emissions are reduced with ethanol addition. Ethanol addition in gasoline significantly improves combustion robustness to spark advance, start of injection timing and spark plug penetration in the combustion chamber. However, when decreasing load and engine speed, ethanol has a negative effect on the indicated efficiency. This is probably due to enhanced wall heat transfers with ethanol blends since a longer spray penetration may lead to combustion closer to the walls of the combustion chamber. The penalty on the lower heating value-corrected fuel specific consumption reached 19% with E85 vs. E0 at 1000 rpm / 2 bar IMEP. In the upper speed and load zone, at 3500 rpm / 8 bar IMEP, a 5% gain was observed.
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de Francqueville, L., "Effects of Ethanol Addition in RON 95 Gasoline on GDI Stratified Combustion," SAE Technical Paper 2011-24-0055, 2011, https://doi.org/10.4271/2011-24-0055.Data Sets - Support Documents
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References
- Matsumoto, A. Moore, W. Lai, M. Zheng, Y. et al. “Spray Characterization of Ethanol Gasoline Blends and Comparison to a CFD Model for a Gasoline Direct Injector,” SAE Int. J. Engines 3 1 402 425 2010 10.4271/2010-01-0601
- Szybist, J. Foster, M. Moore, W. Confer, K. et al. “Investigation of Knock Limited Compression Ratio of Ethanol Gasoline Blends,” SAE Technical Paper 2010-01-0619 2010 10.4271/2010-01-0619
- Wallner, T. Miers, S. “Combustion Behavior of Gasoline and Gasoline/Ethanol Blends in a Modern Direct-Injection 4-Cylinder Engine,” SAE Technical Paper 2008-01-0077 2008 10.4271/2008-01-0077
- Gülder, Ö.L. “Burning Velocities of Ethanol-Isooctane Blends” Comb. and Flame 56 261 268 1984
- Beeckmann, J. Röhl, O. Peters, N. “Experimental and Numerical Investigation of Iso-Octane, Methanol and Ethanol Regarding Laminar Burning Velocity at Elevated Pressure and Temperature,” SAE Technical Paper 2009-01-1774 2009 10.4271/2009-01-1774
- Cairns, A. Todd, A. Aleiferis, P. Fraser, N. et al. “A Study of Alcohol Blended Fuels in an Unthrottled Single Cylinder Spark Ignition Engine,” SAE Technical Paper 2010-01-0618 2010 10.4271/2010-01-0618
- Caton, J. “A Thermodynamic Evaluation of the Use of Alcohol Fuels in a Spark-Ignition Engine,” SAE Int. J. Fuels Lubr. 2 2 1 19 2010 10.4271/2009-01-2621
- Gallo, W. Milanez, L. “Exergetic Analysis of Ethanol and Gasoline Fueled Engines,” SAE Technical Paper 920809 1992 10.4271/920809
- Kneifel, A. Buri, S. Velji, A. Spicher, U. et al. “Investigations on Supercharging Stratified Part Load in a Spray-Guided DI SI Engine,” SAE Int. J. Engines 1 1 171 176 2009 10.4271/2008-01-0143
- Fischer, J. et al. “Methods for the Development of the Spray-Guided BMW DI Combustion System” 7 th Int. Symp. on Combustion Diagnostics 18 19 May 2006 Baden-Baden, Germany
- Altenschmidt, F. “The analysis of the ignition process on SI-engines with DI in stratified mode” 7 th Int. Symp. on Combustion Diagnostics 18 19 May 2006 Baden-Baden, Germany
- Solomon, A.S. Anderson, R.W. Najt, P.M. Zhao, F. “Direct Fuel Injection for Gasoline Engines,” SAE International Warrendale, PA 978-0-76800-536-3 1999
- Drake, M.C. et al. “Stratified-charge combustion: modeling and imaging of a spray-guided DISI engine” Proc. of Comb. Institute 30 2005 2683 2961
- Cruff, L. Kaiser, M. Krause, S. Harris, R. et al. “EBDI® - Application of a Fully Flexible High BMEP Downsized Spark Ignited Engine,” SAE Technical Paper 2010-01-0587 2010 10.4271/2010-01-0587
- Fansler, T. D. Drake, M.C. “Designer diagnostics for developing DI gasoline engines” Invited keynote lecture, Second International Conf. on Optical and laser Diagnostics (ICOLAD 2005) 12 14 sept. 2005
- Tischy, M. et al. “Investigation of injection concepts to optimize the combustion process for spray-guided GDI methods using optical techniques” 7 th Int. Symp. on Combustion Diagnostics 18 19 May 2006 Baden-Baden, Germany
- Kar, K. Cheng, W. “Speciated Engine-Out Organic Gas Emissions from a PFI-SI Engine Operating on Ethanol/Gasoline Mixtures,” SAE Int. J. Fuels Lubr. 2 2 91 101 2010 10.4271/2009-01-2673
- Woschni, G. “A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine,” SAE Technical Paper 670931 1967 10.4271/670931
- Weberbauer, F. Rauscher, M. Kulzer, A. Knopf, M. Bargende, M. “Split of Losses for New Combustion Concepts” Generally Applicate MTZ 2 2005 66
- www.lmsintl.com/imagine
- Martinot, S. Beard, P. Roesler, J. Garo, A. “Comparison and Coupling of Homogeneous Reactor and Flamelet Library Soot Modeling Approaches for Diesel Combustion,” SAE Technical Paper 2001-01-3684 2001 10.4271/2001-01-3684
- Gautam, M. et al. “Combustion characteristics of higher alcohol/gasoline blends” Proc. Inst. Mech. Engrs 214 2000
- Nabi, M. Ogawa, H. Miyamoto, N. “Nature of Fundamental Parameters Related to Engine Combustion for a Wide Range of Oxygenated Fuels,” SAE Technical Paper 2002-01-2853 2002 10.4271/2002-01-2853
- Espey, C. Dec, J.E. Litzinger, T.A. “Planar Laser Rayleigh Scattering for Quantitative Vapor-Fuel Imaging in a Diesel Jet” Combustion and Flame 109 1997 65 86
- Tea, G. Bruneaux, G. Kashdan, J.T. Schulz, C. “Unburned Gas Temperature Measurements in a surrogate Diesel Jet via Two-Color Toluene-LIF Imaging” Proc. Comb. Inst. 2010
- Di Lella, Angela de Hemptinne, Jean-Charles Bruneaux, Gilles “Use of a predictive equation of state to investigate biofuel vaporisation behaviour” Poster communication; 19th International Congress of Chemical and Process Chemical Engineering CHISA 2010 Prague Czech Republic 28 August 1 September 2010