Abstract
This study investigated the spray and combustion characteristics of a direct injection spark ignition type system based on the changes in the temperature of the blended fuel (with bio-ethanol and gasoline). The test was performed in a chamber with a constant volume. The diameter and width of the chamber were 86 mm and 39 mm, respectively. The bio-ethanol test fuel was blended at volume ratios of 0 %, 10 %, 20 % and 100 %. The temperature of the fuel was set as −7, 25 and 35 °C. The fuel injection pressure and ambient pressure were set as 4.5 and 0.5 MPa, respectively. The shape and characteristics of the spray were investigated through a spray experiment. The increase in the fuel temperature changed its density and viscosity; this in turn increased spray penetration and spray area and increased the bio-ethanol blending ratio. The combustion visualization and experimental analysis indicated that the decrease in the fuel temperature and the increase in the bio-ethanol blending ratio led to the high viscosity and low heating value. This resulted in an increase in the ignition delay and a decrease in the rate of heat release. It is necessary to adjust the spray strategy and ignition timing to adopt bio-ethanol blended fuel as an alternative fuel.
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Recommended by Associate Editor Jeong Park
Gi-Young Park received his B.S. in Mechanical Engineering in 2010 from Soonchunhyang University and will receive his M.S. in automotive engineering in 2012 from Kookmin University. He is a ABD Researcher at green power laboratory and his main research interest is in internal combustion engines.
Seang-Wock Lee received his B.S. and M.S. in Mechanical Engineering in 1996 and 1998 from Kookmin University, and then the Ph.D. in 2003 from Waseda University. He is a Professor at Kookmin University in Seoul, Korea. His research interests are in thermal dynamics, internal combustion engines and alternative fuel engines.
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Park, GY., Kang, SH. & Lee, SW. An experimental study on spray and combustion characteristics based on fuel temperature of direct injection bio-ethanol-gasoline blending fuel. J Mech Sci Technol 30, 5239–5246 (2016). https://doi.org/10.1007/s12206-016-1042-4
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DOI: https://doi.org/10.1007/s12206-016-1042-4