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Sequenced combustion characteristics, emission and thermal efficiency in gasoline homogeneous charge induced ignition

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  • Chao, Yu
  • Zhi, Wang
  • Jianxin, Wang

Abstract

In this study, the concept of Homogeneous Charge Induced Ignition (HCII) is employed using port-injection of the high-volatile fuel (gasoline) to prepare in-cylinder homogeneous charge and direct injection of the high-ignitable fuel (diesel) near the top dead center (TDC) to control the start of combustion. The experiment was conducted on a single cylinder research engine with compression ratio of 16.7. The engine was operated at an engine speed of 1600rpm for the IMEP from 0.3 to 0.8MPa while the EGR was varied between 0% and 35%. Three different sequential heat release modes with HCII are studied, i.e., slow single-stage combustion (SSC), two-stage combustion (TSC) and fast single-stage combustion (FSC). The FSC mode is close to constant-volume combustion and the TSC mode is close to constant-pressure combustion. The FSC mode has high pressure rise rate and low thermal efficiency due to heat transfer. The TSC mode features high thermal efficiency and smoother pressure rise rate whereas the SSC mode should be avoided due to its high emissions of HC and CO and low thermal efficiency. TSC can be utilized for high load operation under the restricted conditions of peak in-cylinder pressure and combustion noise. NOx and soot emissions can be reduced significantly by using EGR for TSC. Heat release contribution of gasoline and diesel in dual-fuel combustion was distinguished by specially designed experiment. It is found that the first-stage heat release is from the local mixture of diesel and gasoline, and the second-stage heat release is from the premixed gasoline. As the diesel–gasoline ratio increases from 10% to 30%, the contribution of the first-stage combustion to the total heat release increases from 25% to 50% approximately in which the contribution from gasoline increases from 15% to 20%.

Suggested Citation

  • Chao, Yu & Zhi, Wang & Jianxin, Wang, 2014. "Sequenced combustion characteristics, emission and thermal efficiency in gasoline homogeneous charge induced ignition," Applied Energy, Elsevier, vol. 124(C), pages 343-353.
    • Handle: RePEc:eee:appene:v:124:y:2014:i:c:p:343-353
    DOI: 10.1016/j.apenergy.2014.03.021
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    References listed on IDEAS

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    1. Wu, Horng-Wen & Wang, Ren-Hung & Ou, Dung-Je & Chen, Ying-Chuan & Chen, Teng-yu, 2011. "Reduction of smoke and nitrogen oxides of a partial HCCI engine using premixed gasoline and ethanol with air," Applied Energy, Elsevier, vol. 88(11), pages 3882-3890.
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    5. Ma, Shuaiying & Zheng, Zunqing & Liu, Haifeng & Zhang, Quanchang & Yao, Mingfa, 2013. "Experimental investigation of the effects of diesel injection strategy on gasoline/diesel dual-fuel combustion," Applied Energy, Elsevier, vol. 109(C), pages 202-212.
    6. Yang, Binbin & Yao, Mingfa & Cheng, Wai K. & Li, Yu & Zheng, Zunqing & Li, Shanju, 2014. "Experimental and numerical study on different dual-fuel combustion modes fuelled with gasoline and diesel," Applied Energy, Elsevier, vol. 113(C), pages 722-733.
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    Cited by:

    1. Wei Tian & Hongchuan Zhang & Lenian Wang & Zhiqiang Han & Wenbin Yu, 2020. "Effect of Premixed n-Butanol Ratio on the Initial Stage of Combustion in a Light-Duty Butanol/Diesel Dual-Fuel Engine," Energies, MDPI, vol. 13(17), pages 1-10, August.
    2. Li, Jing & Yu, Xiao & Xie, Jingcheng & Yang, Wenming, 2020. "Mitigation of high pressure rise rate by varying IVC timing and EGR rate in an RCCI engine with high premixed fuel ratio," Energy, Elsevier, vol. 192(C).
    3. Li, Jing & Ling, Xiang & Liu, Deng & Yang, Wenming & Zhou, Dezhi, 2018. "Numerical study on double injection techniques in a gasoline and biodiesel fueled RCCI (reactivity controlled compression ignition) engine," Applied Energy, Elsevier, vol. 211(C), pages 382-392.
    4. Yang, Hongqiang & Wang, Zhi & Shuai, Shijin & Wang, Jianxin & Xu, Hongming & Wang, Buyu, 2015. "Temporally and spatially distributed combustion in low-octane gasoline multiple premixed compression ignition mode," Applied Energy, Elsevier, vol. 150(C), pages 150-160.
    5. Li, Jing & Yang, Wenming & Zhou, Dezhi, 2017. "Review on the management of RCCI engines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 69(C), pages 65-79.
    6. Zhao, Wenbin & Mi, Shijie & Wu, Haoqing & Zhang, Yaoyuan & Zhang, Qiankun & He, Zhuoyao & Qian, Yong & Lu, Xingcai, 2022. "Towards a comprehensive understanding of mode transition between biodiesel-biobutanol dual-fuel ICCI low temperature combustion and conventional CI combustion – Part Ⅰ: Characteristics from medium to ," Energy, Elsevier, vol. 246(C).
    7. Yang, Bo & Xi, Chengxun & Wei, Xing & Zeng, Ke & Lai, Ming-Chia, 2015. "Parametric investigation of natural gas port injection and diesel pilot injection on the combustion and emissions of a turbocharged common rail dual-fuel engine at low load," Applied Energy, Elsevier, vol. 143(C), pages 130-137.

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