Potentials of Air-EGR Dilution for Improving Performance of a High Compression Ratio Spark-Ignition Engine Fueled with Methanol

The effects of air and exhaust gas recirculation (EGR) dilution of a spark ignition engine fueled with methanol under different loads were studied by experiment in this paper. Such as ignition delay, combustion center (CA50), IMEP, break thermal efficiency (BTE) and other parameters were investigate...

Full description

Saved in:
Bibliographic Details
Published inInternational journal of automotive technology Vol. 24; no. 4; pp. 1061 - 1073
Main Authors Lai, Kaichang, Chen, Hong, Du, Jiakun, Zhan, Wenfeng, Li, Yuhuai, Xie, Fangxi
Format Journal Article
LanguageEnglish
Published Seoul The Korean Society of Automotive Engineers 01.08.2023
Springer Nature B.V
한국자동차공학회
Subjects
Automotive Engineering
Combustion
Compression ratio
Dilution
Emissions
Energy consumption
Engineering
Exhaust gases
Methanol
Nitrogen oxides
Spark ignition
Thermodynamic efficiency
자동차공학
Break special fuel consumption
NOx emissions
Lean burn
Air and EGR dilution
Methanol
Online AccessGet full text

Cover

More Information
Summary:The effects of air and exhaust gas recirculation (EGR) dilution of a spark ignition engine fueled with methanol under different loads were studied by experiment in this paper. Such as ignition delay, combustion center (CA50), IMEP, break thermal efficiency (BTE) and other parameters were investigated to assess the combustion performance. And discussed in depth the balance between NOx emissions and economic performance represented by brake specific fuel consumption (BSFC). The results showed that combustion progress such as ignition delay, combustion duration and CA50 were more sensitive on the changes of EGR, introducing EGR under the same dilution rate prolonged combustion process. Air-EGR dilution showed the best improvement of IMEP and break thermal efficiency, except the optimal area, increasing EGR rate will decreased IMEP and BTE. Air-EGR dilution strategy showed the best improvement on BSFC than air dilution than EGR dilution. Under light load and high load, when the lowest BSFC was obtained, NOx emissions were less than 0.5 g/kWh with air-EGR dilution strategy.
ISSN:1229-9138
1976-3832
DOI:10.1007/s12239-023-0087-5