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Regulated emissions from a direct-injection spark-ignition methanol engine

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  • Gong, Chang-Ming
  • Huang, Kuo
  • Jia, Jing-Long
  • Su, Yan
  • Gao, Qing
  • Liu, Xun-Jun

Abstract

The effects of injection timing, ignition timing, and injection nozzle parameters on the regulated emissions from a high-compression ratio direct-injection spark-ignition methanol engine were investigated experimentally and its emission characteristics were compared with the diesel counterpart. The experimental results indicated that the injection and ignition timings affect exhaust emissions significantly. Best compromises between the brake thermal efficiency and three emission pollutants at the optimal injection and ignition timings were obtained. The effects of injection nozzle parameters on emissions of methanol engine are significant. The THC (total hydrocarbon compounds) emission using an injector of a 10-hole × 0.30 mm nozzle is lower significantly than those of 7-hole × 0.45 mm nozzle in the overall load range and CO (carbon monoxide) emission is also lower, but NOx (nitrogen oxides) emission is higher at high load. The methanol engine is characterized by smokeless combustion. According to the ECE R49-13 mode test procedure, the brake specific NOx emission from the methanol engine is only nearly half that from the diesel counterpart and 11% lower for the CO emission, but 273% higher for the THC emission.

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  • Gong, Chang-Ming & Huang, Kuo & Jia, Jing-Long & Su, Yan & Gao, Qing & Liu, Xun-Jun, 2011. "Regulated emissions from a direct-injection spark-ignition methanol engine," Energy, Elsevier, vol. 36(5), pages 3379-3387.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:5:p:3379-3387
    DOI: 10.1016/j.energy.2011.03.035
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    15. Meng, Hao & Ji, Changwei & Su, Teng & Yang, Jinxin & Chang, Ke & Xin, Gu & Wang, Shuofeng, 2022. "Analyzing characteristics of knock in a hydrogen-fueled Wankel rotary engine," Energy, Elsevier, vol. 250(C).
    16. Chen, Guisheng & Shen, Yinggang & Zhang, Quanchang & Yao, Mingfa & Zheng, Zunqing & Liu, Haifeng, 2013. "Experimental study on combustion and emission characteristics of a diesel engine fueled with 2,5-dimethylfuran–diesel, n-butanol–diesel and gasoline–diesel blends," Energy, Elsevier, vol. 54(C), pages 333-342.
    17. Gong, Changming & Yi, Lin & Wang, Kang & Huang, Kuo & Liu, Fenghua, 2020. "Numerical modeling of plasma-assisted combustion effects on firing and intermediates in the combustion process of methanol–air mixtures," Energy, Elsevier, vol. 192(C).
    18. Wang, Xin & Ge, Yunshan & Liu, Linlin & Peng, Zihang & Hao, Lijun & Yin, Hang & Ding, Yan & Wang, Junfang, 2015. "Evaluation on toxic reduction and fuel economy of a gasoline direct injection- (GDI-) powered passenger car fueled with methanol–gasoline blends with various substitution ratios," Applied Energy, Elsevier, vol. 157(C), pages 134-143.
    19. Çay, Yusuf & Korkmaz, Ibrahim & Çiçek, Adem & Kara, Fuat, 2013. "Prediction of engine performance and exhaust emissions for gasoline and methanol using artificial neural network," Energy, Elsevier, vol. 50(C), pages 177-186.
    20. Nuthan Prasad, B.S. & Pandey, Jayashish Kumar & Kumar, G.N., 2020. "Impact of changing compression ratio on engine characteristics of an SI engine fueled with equi-volume blend of methanol and gasoline," Energy, Elsevier, vol. 191(C).
    21. Liu, Hui & Wang, Zhi & Long, Yan & Xiang, Shouzhi & Wang, Jianxin & Wagnon, Scott W., 2015. "Methanol-gasoline Dual-fuel Spark Ignition (DFSI) combustion with dual-injection for engine particle number (PN) reduction and fuel economy improvement," Energy, Elsevier, vol. 89(C), pages 1010-1017.
    22. Cheolwoong Park & Taeyoung Kim & Gyubaek Cho & Janghee Lee, 2016. "Combustion and Emission Characteristics According to the Fuel Injection Ratio of an Ultra-Lean LPG Direct Injection Engine," Energies, MDPI, vol. 9(11), pages 1-12, November.
    23. Gong, Changming & Sun, Jingzhen & Liu, Fenghua, 2021. "Numerical research on combustion and emissions behaviors of a medium compression ratio direct-injection twin-spark plug synchronous ignition methanol engine under steady-state lean-burn conditions," Energy, Elsevier, vol. 215(PB).
    24. Gong, Changming & Zhang, Zilei & Sun, Jingzhen & Chen, Yulin & Liu, Fenghua, 2020. "Computational study of nozzle spray-line distribution effects on stratified mixture formation, combustion and emissions of a high compression ratio DISI methanol engine under lean-burn condition," Energy, Elsevier, vol. 205(C).
    25. Li, Yaopeng & Jia, Ming & Chang, Yachao & Liu, Yaodong & Xie, Maozhao & Wang, Tianyou & Zhou, Lei, 2014. "Parametric study and optimization of a RCCI (reactivity controlled compression ignition) engine fueled with methanol and diesel," Energy, Elsevier, vol. 65(C), pages 319-332.

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