Thermodynamic Evaluation of Using Ethanol-Gasoline Blends in Spark Ignition Engine

Yarian Reyes Suarez, Yanoy Morejon Mesa, Abel Hernández Herranz


The present investigation was developed in the Engines Laboratory that belongs to the Faculty of Technical Sciences, in the Agrarian University of the Havana (UNAH). For its development a spark ignition engine, Jacto model, was used. The objective of this investigation was to evaluate thermodynamically the use of blends ethanol-gasoline. To achieve the outlined objective, different percentages of ethanol were added to the gasoline (E-10%; E-15%; E-20%; E-25%), to carry out an incomplete combustion with coefficient of excess of air ∝=0,85 and an complete combustion with coefficient of excess of air ∝=1,5, for the different percentages of ethanol. Among the main results obtained it was evidenced that when using pure gasoline, the necessary air-fuel rate to achieve the combustion, is bigger than when blends are used with ethanol, because ethanol contains oxygen, and that impoverishes the blend and guarantees a better quality in the combustion process. On the other hand, it was verified that for E-10 and E-15 blends, a better environmental and energy behaviour was obtained due to the increment of the octane rating or antiexplosive capacity of the fuel blends used which improves the quality of the combustion, although decreases the energy power during the explosion (detonation).


Combustion; internal energy; fuel blends; air-fuel rate

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ANOJIN, V.; SAJAROV, A.: Manual del tractorista., Ed. Mir, Moscow, Russia, 1970.

GRAVALOS, I.; MOSHOU, D.; GIALAMAS, T.; XYRADAKIS, P.; KATERIS, D.; TSIROPOULOS, Z.: “Performance and emission characteristics of spark ignition engine fuelled with ethanol and methanol gasoline blended fuels”, Alternative fuel, 85, 2011.

GUARIEIRO, L.L.N.; GUARIEIRO, L.L.: Vehicle emissions: What will change with use of biofuel, Ed. InTech, Zhen Fang ed., 357-386 p., 2013, ISBN: 978-953-51-0950-1.

GUREVYCH, A.; SOROKIN, E.: Tractores y automóviles., Ed. Mir, vol. Tomo 2, Moscú, Rusia, 692 p., 1978.

GUTIÉRREZ, S.M.: Mantenimiento de motores térmicos de dos y cuatro tiempos. TMVG0409, Ed. IC Editorial, 2013, ISBN: 84-15670-05-2.

JOVARJ, M.: Motores de automóvil, Ed. Mir, Moscow, Russia, 1982.

KAMBOJ, S.K.; KARIMI, M.N.: “A Study of Spark Ignition Engine Fueled with Methanol and Ethanol Fuel Blends with Iso-Octane”, Int. J. of Thermal & Environmental Engineering, 8(1): 25-31, 2014.

KHEIRALLA, A.; TOLA, E.; BAKHIT, J.: “Performance of ethanol-gasoline blends of up to E35 as alternative Automotive fuels.”, Advances in Bioresearch, 8(5), 2017, ISSN: 0976-4585.

KOZAK, M.: “Ethyl alcohol as a fuel for contemporary internal combustion engines”, Diagnostyka, 20, 2019, ISSN: 1641-6414.

KOZLOV, A.; GRINEV, V.; TERENCHENKO, A.; KORNILOV, G.: “An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine”, Energies, 12(12): 2280, 2019.

KRALOB, C.M.; ANTONOV, V.N.: Estructura, mantenimiento térmico y reparación de automóviles y motocicletas, Ed. Escuela Superior, Moscú, Rusia, 320 p., 1980.

MANTILLA, J.; GALEANO, C.; MUÑOZ, A.: “Mezclas gasolina-etanol en motores de combustión interna en Colombia”, Revista Mutis, 6(1): 41-53, 2016, ISSN: 2256-1498.

PANCRATOV, C.: Motores de Combustión Interna de Automóviles, Tractores y su Explotación, Ed. Escuela Superior, Moscow, Russia, 296 p., 1979.

PIKŪNAS, A.; PUKALSKAS, S.; GRABYS, J.: “Influence of composition of gasoline-ethanol blends on parameters of internal combustion engines”, Journal of KONES Internal Combustion Engines, 10(3-4), 2003.

SUN, P.; LIU, Z.; DONG, W.; YANG, S.: “Comparative Study on the Effects of Ethanol Proportion on the Particle Numbers Emissions in a Combined Injection Engine”, Energies, 12(9): 1788, 2019.

VZOROV, B.A.; ADAMOVICH, A.V.; ARABYAN, A.G.: Tractor Diesels: Handbook [in Russian], Ed. Mashinostroenie, Moscow, Russia, 536 p., 1981.


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