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Implementation of Oxy-Fuel Combustion (OFC) Technology in a Gasoline Direct Injection (GDI) Engine Fueled with
Xiang Li1, Yiqiang Pei2, Dayou Li1
1School of Computer Science and Technology, University of Bedfordshire, Luton LU1 3JU, U.K.
Oxy-fuel combustion in gasoline engines using ethanol blends shows promise for carbon neutrality. Increasing ethanol content and oxygen levels impacts combustion timing and fuel efficiency, offering insights for emission reduction strategies.
Area of Science:
- Combustion science and engineering
- Automotive emissions control
- Renewable energy integration
Background:
- Global warming necessitates carbon neutrality, driving research into carbon capture and storage (CCS).
- Oxy-fuel combustion (OFC) is a key technology for eliminating carbon dioxide (CO2) emissions.
- Gasoline direct injection (GDI) engines are common, and their adaptation to OFC with alternative fuels is crucial.
Purpose of the Study:
- To investigate the implementation of OFC in a GDI engine using gasoline-ethanol blends (E0, E25, E50).
- To analyze the effects of varying oxygen mass fraction (OMF) and intake temperature (TI) on combustion characteristics and efficiency.
- To evaluate the potential of OFC with ethanol blends for reducing CO2 emissions in internal combustion engines.
Main Methods:
- Experimental study of OFC in a GDI engine using E0, E25, and E50 fuels.
- Systematic variation of oxygen mass fraction (23.3% to 29%) and intake temperature (298 K to 358 K).
- Measurement and analysis of combustion parameters: CA50, ignition delay (θF), combustion duration (θC), heat release rate (HRR), brake-specific fuel consumption (BSFC E), and brake-specific oxygen consumption (BSOC).
Main Results:
- Increased ethanol fraction delayed CA50 and extended ignition delay (θF) and combustion duration (θC).
- Higher OMF improved equivalent brake-specific fuel consumption (BSFC E) by up to 2.12% but increased brake-specific oxygen consumption (BSOC).
- OMF had minimal impact on θF, θC, and HRR, while increased intake temperature advanced key combustion events (CA50, peak cylinder pressure) and reduced durations.
Conclusions:
- OFC with gasoline-ethanol blends is feasible in GDI engines, offering a pathway for CO2 emission reduction.
- Fuel blend composition and OMF significantly influence combustion phasing and efficiency metrics.
- Optimizing OMF and intake temperature can enhance the performance and effectiveness of OFC for CCS applications.
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