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http://dx.doi.org/10.3795/KSME-B.2015.39.7.609

Effect of Engine Operating Conditions on Combustion and Exhaust Emission Characteristics of a Gasoline Direct Injection(GDI) Engine Fueled with Bio-ethanol  

Yoon, Seung Hyun (Division of Automotive Engineering, Yeungnam College of Science&Technology)
Park, Su Han (School of Mechanical Engineering, Chonnam Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.39, no.7, 2015 , pp. 609-615 More about this Journal
Abstract
In this study, the combustion and exhaust emission characteristics in a gasoline direct injection engine with variations of the bio-ethanol-gasoline blending ratio and the excess air factor were investigated. To investigate the effects of the excess air factor and the bio-ethanol blends with gasoline, combustion characteristics such as the in-cylinder combustion pressure, rate of heat release (ROHR), and the fuel consumption rate were analyzed. The reduction of exhaust emissions such as carbon monoxide (CO), unburned hydrocarbon (HC), and nitrogen oxides ($NO_x$) were compared with those of gasoline fuel with various excess air factors. The results showed that the peak combustion pressure and ROHR of bio-ethanol blends were slightly higher and were increased as bio-ethanol blending ratio is increased. Brake specific fuel consumption increased for a higher bio-ethanol blending ratio. The exhaust emissions decreased as the bio-ethanol blending ratio increased under all experimental conditions. The exhaust emissions of bio-ethanol fuels were lower than those of gasoline.
Keywords
Bio-ethanol; Alternative Fuel; Combustion Characteristics; Exhaust Emission; Gasoline Direct Injection Engine; Excess Air Factor;
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Times Cited By KSCI : 3  (Citation Analysis)
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