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A Study on the Combustion and Exhaust Emission Characteristics with the Variations of Mixing and Air-fuel Ratio of Bio-ethanol - Gasoline in a SI Engine
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 Title & Authors
A Study on the Combustion and Exhaust Emission Characteristics with the Variations of Mixing and Air-fuel Ratio of Bio-ethanol - Gasoline in a SI Engine
Yoon, Seunghyun; Ha, Sungyong;
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 Abstract
The combustion and exhaust emission characteristics in a spark ignition (SI) engine with various test fuels (bioethanol - gasoline blends) and air-fuel ratio were investigated in this research. To investigate the influence of the excess air ratio and ethanol blends on the combustion characteristics such as the cylinder pressure, rate of heat release (ROHR), and fuel consumption rate were analyzed. In addition, the reduction effects of exhaust emissions such as carbon monoxide (CO), unburned hydrocarbon (HC), and oxides of nitrogen (NOx) were compared with those of neat gasoline fuel under the various excess-air ratios. The results showed that the peak combustion pressures and the ROHR of bioethanol fuel cases were slightly higher than those of gasoline fuel at all test ranges and fuel ratio. As compared with gasoline fuel (G100) at each given excess air ratio, BSFC of bio-ethanol was increased. The CO, HC, NOx emissions of bio-ethanol blends were lower than those of gasoline fuel under overall experimental conditions.
 Keywords
Bioethanol;Alternative fuel;Combustion characteristics;Exhaust emission;Gasoline engine;
 Language
Korean
 Cited by
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