FlexFuel Strategy for 2-Wheeler

Xavier, Érika Fialho Morais; Bepu, Ariel; Leder, Martin; Arens, Walter

doi:10.4271/2013-32-9003

Cited by 2 publications

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“…The trend of increasing commercialization of flex-fuel vehicles in the Brazilian market allows a certain freedom in the choice of fuel [21]. This is beneficial because it guarantees for the consumer greater security due to fuel price instabilities, which may occur due to international economic crisis or offspring's lack of production, affecting the oil and ethanol prices, respectively.…”

Section: Introductionmentioning

confidence: 99%

An evaluation of combustion aspects with different compression ratios, fuel types and injection systems in a single-cylinder research engine

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et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The growing commercialization of flex-fuel vehicles in Brazil demands the optimization of internal combustion engines for the operation with ethanol (E100) and gasohol (E22), in an attempt to reduce the fuel consumption and minimize the pollutant emissions into the atmosphere. In this sense, this work proposes the study of different volumetric compression ratios in a single-cylinder research engine in order to conclude about its fuel conversion efficiency and, in particular, a more detailed combustion investigation for two of the most common Brazilian fuels. Dynamometric bench tests were performed for distinct compression ratios, injection systems and fuel types, which demanded a specific piston design to meet the requirements for each combustion chamber configuration. The use of ethanol was the most suitable when compared to gasohol, especially at high load conditions, in which was observed a knock tendency for E22 but not for E100, due to its improved physicochemical properties, resulting in enhanced combustion aspects. The proposed methodology proved effective in allowing fuel conversion efficiency gains for the tested fuels, injection systems and piston designs when compared to the engine baseline operation, with up to 6.1% improvement when using the most appropriate compression ratio. Finally, the ethanol direct injection confirmed the potential of this Brazilian biofuel as one of the most promising renewable options for internal combustion engines in current and future sustainable energy directives. Keywords Compression ratio • Internal combustion engine • Fuel conversion efficiency • Ethanol • Flex-fuel Abbreviations ABDC After bottom dead center APMAX Angle of maximum pressure (°) ATDC After top dead center BBDC Before bottom dead center BMEP Brake mean effective pressure (bar) BTDC Before top dead center CA Crank angle CO 2 Carbon dioxide COV Covariance (%) CR Compression ratio DI Direct injection E100

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Section: Introductionmentioning

confidence: 99%

An evaluation of combustion aspects with different compression ratios, fuel types and injection systems in a single-cylinder research engine

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Costa

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…I G U R E 8 Various calibrating parameters of EMS based on fuel recognition module in FFE77,78 T A B L E 2 Effect of ethanol share on combustion, performance and emission characteristics in flexi-fuel engine L E 3 Influence of engine design variables and operating parameters on combustion, performance and emission characteristics of FFE λ = 1.05) and BSEC (afterλ = 1.15)BP, BSFC (before λ = 1.05) and BSEC (upto λ = and HRR diminishes with increased λ due to a lower burning rate with advanced spark timing.…”

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Critical review on recent progress of ethanol fuelled flex‐fuel engine characteristics

Azhaganathan

Ashok

2022

Intl J of Energy Research

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Summary Ethanol‐powered spark ignition (SI) engines have the potential to mitigate the twin crisis of fossil fuel depletion and exhaust emissions. However, the successful promotion of ethanol is hindered due to the restriction of fuel blend diversity and design features in the conventional SI engine. The fuel flexibility can be overcome by the use of flex‐fuel engine (FFE) technology with appropriate changes in engine design features for a wide range of ethanol blends. The understanding of FFE based on various technical aspects has greater potential in the automotive sector. Therefore, this review paper provides a holistic approach to critically analyze the various technical aspects of FFE. In this work, the application of ethanol blends on FFE output characteristics is reviewed critically considering the effects of engine operating conditions and parameters. Further, the impact of ethanol blends on material compatibility, cold starting characteristics, and unregulated emissions are analyzed. The outcome of the study shows that combustion and performance characteristics such as cylinder pressure(CP), heat release rate (HRR), and brake thermal efficiency (BTE) are improved in FFE operation due to the clean‐burning characteristics of ethanol blends. Also, carbon monoxide(CO) and hydrocarbon (HC) emissions decreased without any significant improvement in nitrogen oxides (NOx) emissions with a wide range of ethanol shares in FFE. Finally, this study summarizes the present status of research in FFE and creates a route towards the direction of multidisciplinary research need in the future that supports the application of different types of biofuels in FFE.

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FlexFuel Strategy for 2-Wheeler

Cited by 2 publications

References 0 publications

An evaluation of combustion aspects with different compression ratios, fuel types and injection systems in a single-cylinder research engine

An evaluation of combustion aspects with different compression ratios, fuel types and injection systems in a single-cylinder research engine

Critical review on recent progress of ethanol fuelled flex‐fuel engine characteristics

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