Effects of mixture enleanment in combustion and emission parameters using a flex-fuel engine with ethanol and gasoline

Roso, Vinícius Rückert; Santos, Nathália Duarte Souza Alvarenga; Álvarez, Carlos Eduardo Castilla; Filho, Fernando Antônio Rodrigues; Pujatti, Fabrício José Pacheco; Valle, Ramón Molina

doi:10.1016/j.applthermaleng.2019.03.012

Cited by 56 publications

(21 citation statements)

References 57 publications

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“…Besides that, bioethanol has a higher flame speed compared to gasoline fuel will assist in completing combustion, which induces lower CO emission [42] [25]. The results were also concordant with findings of the previous researcher, which utilised bioethanol and gasoline blends [43]…”

Section: Carbon Monoxidesupporting

confidence: 90%

Effects of Lean Combustion on Bioethanol-Gasoline Blends using Turbocharged Spark Ignition Engine

Mamat

Alias

et al. 2021

IJAME

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Liquid alternative fuels have been utilised as engine fuel since the 19th century. For several alternative fuels, bioethanol is well-known as the most suited friendly, alternative-product based and renewable for use in spark-ignition (SI) engines. In addition, it is well known that bioethanol has higher evaporation of heat, research octane number and flammability of temperature; therefore, it has a greater influence on performance and lower emission. In this study, the effect of gasoline fuel RON95 (G) was blended into bioethanol fuel (E10, E20 and E30) to investigate the engine combustion, performance and emission. The engine used was 1.8L Mitsubishi, four-cylinder, four-stroke, multipoint port injection and turbocharger SI. The engine speed used was 1000-3000 rpm at 10-40% load with wide-open throttle (WOT). The results showed that bioethanol addition to gasoline increases the brake torque at a higher load. The mass fraction burn (MFB) and coefficient of variation (COV) blend fuel and main fuel are comparable to each other. The brake specific fuel consumption (BSFC) significantly increases when engine speed increases. The emission of nitrogen oxide (NOx), carbon monoxide (CO), and hydrocarbon (HC) emissions reduced dramatically compared to gasoline fuel. Indeed, bioethanol-gasoline fuel allows the engine utilised in low proportion to increase engine performance and lower engine emission.

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Section: Carbon Monoxidesupporting

confidence: 90%

Effects of Lean Combustion on Bioethanol-Gasoline Blends using Turbocharged Spark Ignition Engine

Mamat

Alias

et al. 2021

IJAME

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“…Nevertheless, Roso et al [18] in more recent results obtained significant reductions in NO x emissions of an engine using prechambers with 2.2% of the main chamber volume when compared to the same conventional engine. The temperature and consequent NO x reduction in this study were associated with the mixture impoverishment [5], which can be enhanced with an effective prechamber.…”

Section: Introductionmentioning

confidence: 71%

“…These actions motivate the industries to search for new technologies focused on the use of natural resources, reducing the contamination levels [1]. Although the use of prechamber system is not a current technology in the automotive sector, its use is projected as a potential alternative to reduce fuel consumption and exhaust gas emissions though the burning of lean air-fuel mixtures [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

The influence of volume variation in a homogeneous prechamber ignition system in combustion characteristics and exhaust emissions

Sandoval

Álvarez

Roso

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Research on prechamber ignition systems has become increasingly frequent as they promote significant reductions in engineout emissions with low cost of implementation. In these systems, the combustion starts in an auxiliary chamber and flows through the interconnecting holes, in form of jets, to the main chamber, where it ignites the air-fuel mixture contained therein. Besides the air-fuel ratio, the geometry of the prechamber presents fundamental parameters that influence combustion characteristics and, consequently, the exhaust emissions. This paper aims to evaluate the effects of prechamber volume variation in combustion and emissions of a commercial engine equipped with a homogeneous charge prechamber ignition system. For this, three volumes were considered in stationary tests of a multi-cylinder engine operating under stoichiometric conditions in 1500 rpm and 3.3 bar of IMEP. The results indicated that the increase in volume within the limits considered present increase in the energy released and, hence, in the burning speed, reducing the combustion duration. Comparing to the baseline spark plug system, the prechamber with 3.8% of the main combustion chamber volume presented the best configuration among the evaluated volumes, with an increase in the evolution of pressure traces and reductions in around 13% in unburned hydrocarbons (HC) and nitrogen oxides (NO x) engine-out emissions.

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“…Ethanol has favorable properties compared with gasoline (but also has drawbacks) [6][7][8][9][10]. Its higher octane number enables higher compression rates in combustion, leading to higher efficiency and power.…”

Section: Introductionmentioning

confidence: 99%

Life Cycle and Exergoenvironmental Analyses of Ethanol: Performance of a Flex-Fuel Spark-Ignition Engine at Wide-Open Throttle Conditions

2022

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The growth in the number of vehicles circulating has led to a proportional increase in polluting gas emissions. Bioenergy can be used to help meet these increasing energy demands and mitigate environmental impacts. This work verified the effect of the content of ethanol on the exergy and exergoenvironmental analyses of a spark-ignition engine. Different gasoline–ethanol mixtures were tested along with hydrous ethanol (4.6% water by volume). The thermodynamic data refer to wide-open throttle conditions and variable engine speeds. The life cycle assessment methodology quantified the environmental impacts associated with equipment and fuel using the Eco-indicator 99 method. Pollutants emitted during combustion were measured and included in the environmental assessment (nitrogen oxides, carbon monoxide, and dioxide). Hydrous ethanol at 1500 rpm presented the highest energy efficiency. The effects of the environmental impact rate of pollutant formation and exergy efficiency were significantly higher than the environmental impact rate of fuel. The lowest specific environmental impact of the product (brake power) was 24.39 mPt/MJ, obtained with the fuel blend with 50% ethanol at 2500 rpm. The combined evaluation of the exergoenvironmental factor and the relative difference in environmental impact indicated the optimization priorities and where improvements should be directed.

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Effects of mixture enleanment in combustion and emission parameters using a flex-fuel engine with ethanol and gasoline

Cited by 56 publications

References 57 publications

Effects of Lean Combustion on Bioethanol-Gasoline Blends using Turbocharged Spark Ignition Engine

Effects of Lean Combustion on Bioethanol-Gasoline Blends using Turbocharged Spark Ignition Engine

The influence of volume variation in a homogeneous prechamber ignition system in combustion characteristics and exhaust emissions

Life Cycle and Exergoenvironmental Analyses of Ethanol: Performance of a Flex-Fuel Spark-Ignition Engine at Wide-Open Throttle Conditions

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