Study on the Combustion Characteristics of Ethanol Fuel for Various Engine Speed Conditions in a Turbo-Charged SI Engine

Seung Hyun Yoon; Suhan Park

doi:10.15231/jksc.2025.30.4.032

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2025 Vol.30, Issue 4 Preview Page Next Page

Research Article

Study on the Combustion Characteristics of Ethanol Fuel for Various Engine Speed Conditions in a Turbo-Charged SI Engine Turbo-charged SI기관에서 에탄올 연료의 다양한 엔진회전수 조건에서의 연소 특성에 관한 연구

31 December 2025. pp. 32-37

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Abstract

In this experimental research, the combustion and exhaust emission characteristics of a turbo-charged spark ignition (SI) engine operating on various test fuels (bioethanol - gasoline blends) were investigated. The study analyzed the key combustion characteristics, including brake torque, exhaust gas temperature, and fuel consumption rate, to determine the influence of the ethanol blends. Furthermore, the reduction effects on exhaust emissions, specifically carbon monoxide, unburned hydrocarbons, and nitrogen oxides, were compared against those of neat gasoline. The results showed that the brake torque produced by the ethanol-blended fuels was slightly higher than that of neat gasoline. However, brake specific fuel consumption increased with higher ethanol blending ratio due to the lower heating value of ethanol. Overall, ethanol-blended fuels exhibited lower exhaust emissions than neat gasoline across all experimental conditions. The E100 reduced NO_x emissions by an average of approximately 10% compared to the G100.

Keywords

Bio-ethanol

Alternative fuel

Oxygenated fuel

Combustion characteristics

Exhaust emission

Excess air ratio

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Information

Publisher :The Korean Society of Combustion
Publisher(Ko) :한국연소학회
Journal Title :Journal of the Korean Society of Combustion
Journal Title(Ko) :한국연소학회지
Volume : 30
No :4
Pages :32-37
Received Date : 2025-11-07
Revised Date : 2025-11-15
Accepted Date : 2025-11-15
DOI :https://doi.org/10.15231/jksc.2025.30.4.032

Journal of the Korean Society of Combustion ISSN:1226-0959(Print) 2466-2089(Online) 한국연소학회지

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