Ethanol-Powered Combustion Experimental Study in a Rapid Compression Machine

Sánchez, Fernando Zegarra; Braga, Carlos Valois Maciel; Braga, Leonardo C.; Braga, Sergio Leal; Dias, Flávio G.; Turkovics, Franck; Souza, Renata N. C. De

doi:10.4271/2013-36-0313

Cited by 10 publications

(3 citation statements)

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“…In addition, injection pressure in injector nozzle of ED95 fuel must be higher to achieve the same amount of energy. The results also show that n-butanol, with a 10% share in the mixture, can be used as auto-ignition improver for ethanol in compression ignition systems [16][17][18][19].…”

Section: Introductionmentioning

confidence: 78%

Reactivity-controlled compression ignition (RCCI) with double direct injection of diesel and hydrous ethanol

Teixeira

Braga

Sánchez

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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Oil is still a relevant component in the global energy matrix. However, price fluctuations, irregular production and possible shortage of oil are factors that negatively affect the world economy. Moreover, it is universal unanimity that the exploitation of oil and its derivatives causes setbacks to the environment and diminishes the population life quality. Therefore, there are studies to find natural energy sources to replace petroleum products to reduce the harmful effects caused by fossil fuels. In this work, sugarcane ethanol, widely used to supply passenger cars in Brazil, was the fuel chosen as a possible candidate for diesel replacement, even partially. To conduct the study, a reactive charge compression ignition engine fueled with diesel and ethanol was used to compare two directed injection modes: ethanol and diesel (ED) strategy (ethanol and diesel injected before top dead center (TDC)) and diesel and ethanol (DE) strategy (diesel injected before TDC and ethanol injected after TDC). In all tests in which ethanol was injected, increased ignition delay was observed. The highest efficiency was achieved using the ED injection strategy, but detonations and pressure peaks appeared. Test results also show that, using DE injection strategy, it was possible to increase the amount of ethanol injected, since no pressure peaks nor detonations appeared; however, it presented lower efficiency compared to the ED injection strategy.

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Section: Introductionmentioning

confidence: 78%

Reactivity-controlled compression ignition (RCCI) with double direct injection of diesel and hydrous ethanol

Teixeira

Braga

Sánchez

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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“…Bioethanol is the best alternative fuel for Otto engines, while biodiesel is used for diesel engines [3][4][5][6]. Recently, some studies have considered the utilization of alcohols (methanol, ethanol, butanol and others) in diesel engines through total or partial substitution of diesel oil [7][8][9][10][11][12][13][14][15][16]. Using this fuel in a compression ignition (CI) engine is a challenge due to the lower cetane number, lubricity and viscosity, among other factors [17,18].…”

Section: Introductionmentioning

confidence: 99%

Study of effects of ignition improvers on ethanol compression ignition in the rapid compression machine

Sánchez

Martins

Braga

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The world recognizes that the main source of energy used in transportation is diesel fuel because it is more economical and is also more efficient. For this reason, various sectors of transport and fuel production are developing new technologies aiming at the replacement of traditional fossil fuels by other renewable sources. In the current market, it is possible to find systems that run on blends of diesel and other renewable fuels and test systems that run on mixtures of ethanol and some other substance to reduce auto-ignition. To be able to use ethanol in compression ignition (CI) engines where diesel fuel is typically used, the poor flammability of ethanol under compression ignition conditions is the major problem to be overcome. The techniques used in trials with CI engines to correct this problem are preheating the air in the intake manifold, increasing the compression ratio or the addition of an ignition improver for ethanol. In this study, different tests were carried out in a rapid compression machine using ignition improvers derived from polyethylene glycol. Tests were conducted for different instants for the start of injection of the mixtures and different compression ratios.

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“…Nowadays, some studies have considered the utilization of alcohol in a diesel vehicle. The use of this fuel in a compression ignition (CI) engine is a challenge due to the lower cetane number, lubricity and viscosity, among other factors [5]. Attempts for using alcohol fuel in a compression ignition engine typically involve major modifications to the basic diesel engine such as the increase in the volume of fuel injected by changing the injection timing and the fuel injection pressure.…”

Section: Introductionmentioning

confidence: 99%

Ignition Delay of Reactivity Controlled Compression Ignition (Rcci) for the Mixture of Diesel Fuel and Ethanol in a Rapid Compression Machine

Loaiza¹,

Sánchez²,

Souza³

et al. 2015

Anais Do XXIII Simpósio Internacional De Engenharia Automotiva

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The power generation, used to promote comfort, mobility and others continually grows. To solve this growing demand, efforts have been directed towards the development of new energy sources, preferably renewable, and better ways of energy conversion by increasing the processes efficiencies. A good example of this is the gradual shift from conventional and highly inefficient vehicles, being replaced by hybrids or purely electrics. But even with gradual migration for more efficient energy use, we will continue depending of traditional fuels therefore it is necessary to develop more efficient and less polluting ways to use these sources. Thus, this work aims to study alternative ways of converting energy contained in fuels used in internal combustion engines by use of combustion mode RCCI, two fluids with different cetane numbers are introduced into the combustion chamber at different times with the purpose of burning the fuel with lower cetane number. Therefore, for combustion mode RCCI, the SOI of fuel with lower enthalpy of vaporization and the start of combustion must be determined to determine the ignition delay. The results show the ignition delays for the different techniques of injection of fuels with compression ratios of 16:1 and 20:1.

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Ethanol-Powered Combustion Experimental Study in a Rapid Compression Machine

Cited by 10 publications

References 0 publications

Reactivity-controlled compression ignition (RCCI) with double direct injection of diesel and hydrous ethanol

Reactivity-controlled compression ignition (RCCI) with double direct injection of diesel and hydrous ethanol

Study of effects of ignition improvers on ethanol compression ignition in the rapid compression machine

Ignition Delay of Reactivity Controlled Compression Ignition (Rcci) for the Mixture of Diesel Fuel and Ethanol in a Rapid Compression Machine

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