Experimental Investigation of Different Hydrous Ethanol-Gasoline Blends on a Flex-Fuel Engine

2010 ◽  
Author(s):  
Tadeu C. Cordeiro de Melo ◽  
Guilherme Bastos Machado ◽  
Edimilson Jesus de Oliveira ◽  
Carlos Rodrigues Pereira Belchior ◽  
Marcelo Jose Colaco ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Flex Fuel ◽  
Hydrous Ethanol

Investigating the Effects of Engine Operating Conditions on the Cyclic Variability of a Commercial Flex-Fuel Engine

2019 ◽  
Author(s):  
Fazal Um Min Allah ◽  
Caio Henrique Rufino ◽  
Waldyr Luiz Ribeiro Gallo ◽  
Clayton Barcelos Zabeu
Keyword(s):  
Spark Ignition ◽  
Operating Conditions ◽  
Spark Ignition Engine ◽  
Cylinder Pressure ◽  
Cyclic Variability ◽  
Indicated Mean Effective Pressure ◽  
Mass Fractions ◽  
Cyclic Variations ◽  
Flex Fuel ◽  
Hydrous Ethanol

Abstract The flex-fuel engines are quite capable of running on gasohol and hydrous ethanol. However, the in-cylinder cyclic variations, which are inherently present in spark-ignition (SI) engines, affect the performance of these engines. Therefore, a comprehensive analysis is required to evaluate the effects of in-cylinder cyclic variations of a flex-fuel engine. The experiments were carried out by using Brazilian commercial Gasohol E27 (mixture of 27% anhydrous ethanol in gasoline) and hydrous ethanol E95h (5% water by volume in ethanol) as fuels for a commercial flex-fuel spark ignition engine. A comparison between the cyclic variations of gasohol and hydrous ethanol is presented in this paper. Moreover, the effects of engine operating parameters (i.e., engine speed, engine load and relative air fuel ratio) on cyclic variations are also investigated. The acquired data of in-cylinder pressure and combustion durations are evaluated by carrying out a statistical analysis. The coefficient of variation for indicated mean effective pressure (IMEP) did not exceed the limit of 5% for all tested conditions. Higher cyclic variability of maximum in-cylinder pressure is observed for gasohol fuel and higher engine speeds. The variability of in-cylinder combustion is also evaluated with the help of different combustion stages, which are characterized by corresponding crank positions of 10%, 50% and 90% mass fractions burned.

An Experimental Investigation of Reactivity-Controlled Compression Ignition Combustion in a Single-Cylinder Diesel Engine Using Hydrous Ethanol

2014 ◽  
Vol 137 (3) ◽  
Author(s):  
Wei Fang ◽  
Junhua Fang ◽  
David B. Kittelson ◽  
William F. Northrop
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Thermal Efficiency ◽  
Alternative Fuels ◽  
Compression Ignition ◽  
Reactivity Controlled Compression Ignition ◽  
Single Cylinder ◽  
Diesel Injection ◽  
Soot Emissions ◽  
Hydrous Ethanol

Dual-fuel reactivity-controlled compression ignition (RCCI) combustion using port injection of a less reactive fuel and early-cycle direct injection (DI) of a more reactive fuel has been shown to yield both high thermal efficiency and low NOX and soot emissions over a wide engine operating range. Conventional and alternative fuels such as gasoline, natural gas, and E85 as the lower reactivity fuel in RCCI have been studied by many researchers; however, published experimental investigations of hydrous ethanol use in RCCI are scarce. Making greater use of hydrous ethanol in internal combustion engines has the potential to dramatically improve the economics and life cycle carbon dioxide emissions of using bioethanol. In this work, an experimental investigation was conducted using 150 proof hydrous ethanol as the low reactivity fuel and commercially available diesel as the high reactivity fuel in an RCCI combustion mode at various load conditions. A modified single-cylinder diesel engine was used for the experiments. Based on previous studies on RCCI combustion by other researchers, early-cycle split-injection strategy of diesel fuel was used to create an in-cylinder fuel reactivity distribution to maintain high thermal efficiency and low NOX and soot emissions. At each load condition, timing and mass fraction of the first diesel injection was held constant, while timing of the second diesel injection was swept over a range where stable combustion could be maintained. Since hydrous ethanol is highly resistant to auto-ignition and has large heat of vaporization, intake air heating was needed to obtain stable operations of the engine. The study shows that 150 proof hydrous ethanol can be used as the low reactivity fuel in RCCI through 8.6 bar indicated mean effective pressure (IMEP) and with ethanol energy fraction up to 75% while achieving simultaneously low levels of NOX and soot emissions. With increasing engine load, less intake heating is needed and exhaust gas recirculation (EGR) is required to maintain low NOX emissions.

An Experimental Investigation on Aldehyde and Methane Emissions from Hydrous Ethanol and Gasoline Fueled SI Engine

2020 ◽  
Author(s):  
Maris Gailis ◽  
Vilnis Pirs ◽  
Marcis Jansons ◽  
Gints Birzietis ◽  
Ilmars Dukulis
Keyword(s):  
Experimental Investigation ◽  
Methane Emissions ◽  
Si Engine ◽  
Hydrous Ethanol

Hydrous ethanol–gasoline blends – Combustion and emission investigations on a Flex-Fuel engine

Fuel ◽  
2012 ◽  
Vol 97 ◽  
pp. 796-804 ◽  
Author(s):  
Tadeu C. Cordeiro de Melo ◽  
Guilherme B. Machado ◽  
Carlos R.P. Belchior ◽  
Marcelo J. Colaço ◽  
José E.M. Barros ◽  
...  
Keyword(s):  
Flex Fuel ◽  
Hydrous Ethanol

An Experimental Investigation of Reactivity-Controlled Compression Ignition Combustion in a Single-Cylinder Diesel Engine Using Hydrous Ethanol

2013 ◽  
Author(s):  
Wei Fang ◽  
David B. Kittelson ◽  
William F. Northrop ◽  
Junhua Fang
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Thermal Efficiency ◽  
Compression Ignition ◽  
Reactivity Controlled Compression Ignition ◽  
Engine Load ◽  
Single Cylinder ◽  
Diesel Injection ◽  
Soot Emissions ◽  
Hydrous Ethanol

Dual-fuel reactivity-controlled compression ignition (RCCI) combustion using port injection of a less reactive fuel and early-cycle direct injection of a more reactive fuel has been shown to yield both high thermal efficiency and low NOX and soot emissions over a wide engine operating range. Conventional and alternative fuels such as gasoline, natural gas and E85 as the lower reactivity fuel in RCCI have been studied by many researchers; however, published experimental investigations of hydrous ethanol use in RCCI are scarce. Making greater use of hydrous ethanol in internal combustion engines has the potential to dramatically improve the economics and life cycle carbon dioxide emissions of using bio-ethanol. In this work, an experimental investigation was conducted using 150 proof hydrous ethanol as the low reactivity fuel and commercially-available diesel as the high reactivity fuel in an RCCI combustion mode at various load conditions. A modified single-cylinder diesel engine was used for the experiments. Based on previous studies on RCCI combustion by other researchers, early-cycle split-injection strategy of diesel fuel was used to create an in-cylinder fuel reactivity distribution to maintain high thermal efficiency and low NOX and soot emissions. At each load condition, timing and mass fraction of the first diesel injection was held constant, while timing of the second diesel injection was swept over a range where stable combustion could be maintained. Since hydrous ethanol is highly resistant to auto-ignition and has large heat of vaporization, intake air heating was needed to obtain stable operations of the engine. The study shows that 150 proof hydrous ethanol can be used as the low reactivity fuel in RCCI through 8.6 bar IMEP and with ethanol energy fraction up to 75% while achieving simultaneously low levels of NOX and soot emissions. With increasing engine load, less intake heating is needed and EGR is required to maintain low NOX emissions. Future work will look at stability of hydrous ethanol RCCI at higher engine load.

Computer Simulation of a Flex-Fuel Engine Running on Different Gasoline-Hydrous Ethanol Blends

2012 ◽  
Author(s):  
Tadeu Cavalcante Cordeiro de Melo ◽  
Guilherme Bastos Machado ◽  
Carlos Rodrigues Pereira Belchior ◽  
Marcelo Jose Colaco ◽  
Jose Eduardo Mautone Barros ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Flex Fuel ◽  
Ethanol Blends ◽  
Hydrous Ethanol

Experimental investigation of a compression ignition engine operating on B7 direct injected and hydrous ethanol fumigation

Energy ◽  
2018 ◽  
Vol 165 ◽  
pp. 106-117 ◽  
Author(s):  
Giovani Dambros Telli ◽  
Carlos Roberto Altafini ◽  
Josimar Souza Rosa ◽  
Carlos Alberto Costa
Keyword(s):  
Experimental Investigation ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Hydrous Ethanol

Experimental investigation of hydrous ethanol/air flame front instabilities at elevated temperature and pressures

Fuel ◽  
2021 ◽  
Vol 287 ◽  
pp. 119555
Author(s):  
Luis Fernando Marcondes Gárzon Lama ◽  
Loreto Pizzuti ◽  
Julien Sotton ◽  
Cristiane A. Martins
Keyword(s):  
Experimental Investigation ◽  
Elevated Temperature ◽  
Flame Front ◽  
Hydrous Ethanol

GDI flex fuel engine: Influence of different fuels on the performance

2020 ◽  
pp. 146808742097035
Author(s):  
Guilherme Bastos Machado ◽  
Tadeu C. Cordeiro de Melo ◽  
Katia Moniz da Silva
Keyword(s):  
Fossil Fuels ◽  
Combustion Engine ◽  
Direct Injection ◽  
Engine Performance ◽  
Gasoline Direct Injection ◽  
Low Carbon ◽  
High Efficient ◽  
Flex Fuel ◽  
Hydrous Ethanol ◽  
And Control

The internal combustion engine has been the main source of automotive propulsion for more than 100 years, but nowadays is facing challenges to significantly increase efficiency and reduce pollutants in the path to a low carbon mobility world. In this scenario, several developments have been implemented in the last years and new researches are being developed aiming high efficient and low emission vehicles. More stringent specifications for the fossil fuels and their blends with biofuels can play an important role to reduce carbon footprint of these new engines. In Brazil, since the 1970’s ethanol is widely used for spark ignited engines, either pure or blended in the gasoline (Brazilian gasoline). Brazilian flex fuel vehicles, which can run on hydrous ethanol, Brazilian gasoline or any mixture of these fuels, were released in 2000’s and represent nowadays over 90% of national light duty vehicles production. More recently, gasoline direct injection (GDI) technology was released at Brazilian flex fuel engines. Regarding fuel market, imported gasoline increased its share in recent years and although the compliance with the Brazilian specification, some properties may have significant differences compared to the ones of the average gasoline produced in Brazil. Results of performance, fuel consumption and combustion parameters of a GDI flex fuel engine running on hydrous ethanol and two different gasolines, one imported and other produced in Brazil, are shown in this paper. It is commented that flexibility to use gasoline and ethanol should be accompanied with more sophisticated engine hardware and control software to better explore the potential of the different fuels, and that different types of gasolines can affect many engine performance parameters, although this can be minimized adopting more tight fuels specifications. It is concluded that flex fuel engine designs and calibrations could be improved to obtain optimized performance with different fuels.

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