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Modeling of piston trajectory-based HCCI combustion enabled by a free piston engine

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  • Zhang, Chen
  • Li, Ke
  • Sun, Zongxuan

Abstract

Previously, the authors have designed and implemented an active motion control “virtual crankshaft” for a free piston engine, which enables precise piston tracking of desired trajectories. With this mechanism, the volume of the combustion chamber can be regulated, and therefore the pressure, temperature and species concentrations of in-cylinder gas can be adjusted in real-time which affect the combustion process directly. This new degree of freedom enables us to conduct piston trajectory-based combustion control. In this paper, a model of the free piston engine running homogeneous charge compression ignition combustion under various piston trajectories is presented. The various piston trajectories have the ability to change the compression ratio and accommodate different piston motion patterns between the top dead center and the bottom dead center. Six reaction mechanisms are employed in the model in order to demonstrate the multi-fuel combustion ability of the free piston engine, and to describe the chemical kinetics of different fuels under various piston trajectories. Analysis of the simulation results is then presented which reveals the piston trajectory effects on the combustion in terms of in-cylinder gas temperature trace, indicated output work, heat loss and radical species accumulation process.

Suggested Citation

  • Zhang, Chen & Li, Ke & Sun, Zongxuan, 2015. "Modeling of piston trajectory-based HCCI combustion enabled by a free piston engine," Applied Energy, Elsevier, vol. 139(C), pages 313-326.
    • Handle: RePEc:eee:appene:v:139:y:2015:i:c:p:313-326
    DOI: 10.1016/j.apenergy.2014.11.007
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    Citations

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    Cited by:

    1. Peng Sun & Chi Zhang & Jinhua Chen & Fei Zhao & Youyong Liao & Guilin Yang & Chinyin Chen, 2017. "Hybrid System Modeling and Full Cycle Operation Analysis of a Two-Stroke Free-Piston Linear Generator," Energies, MDPI, vol. 10(2), pages 1-23, February.
    2. Zhang, Yan & Yang, Binbin & Ji, Deliang & Hou, Xiaochen & Zhao, Bo & Zhang, Tiezhu, 2023. "Integrated simulation and performance analysis of Confined Piston Linear Generator (CPLG)," Energy, Elsevier, vol. 282(C).
    3. Zhang, Chen & Sun, Zongxuan, 2017. "Trajectory-based combustion control for renewable fuels in free piston engines," Applied Energy, Elsevier, vol. 187(C), pages 72-83.
    4. Zhang, Chen & Sun, Zongxuan, 2016. "Using variable piston trajectory to reduce engine-out emissions," Applied Energy, Elsevier, vol. 170(C), pages 403-414.
    5. Xuezhen Wang & Feixue Chen & Renfeng Zhu & Guilin Yang & Chi Zhang, 2018. "A Review of the Design and Control of Free-Piston Linear Generator," Energies, MDPI, vol. 11(8), pages 1-21, August.
    6. Wang, Qian & Wu, Fan & Zhao, Yan & Bai, Jin & Huang, Rong, 2019. "Study on combustion characteristics and ignition limits extending of micro free-piston engines," Energy, Elsevier, vol. 179(C), pages 805-814.
    7. Geng, Heming & Wang, Yang & Zhen, Xudong & Liu, Yu & Li, Zhiyong, 2018. "Study on adaptive behavior and mechanism of compression ratio (or piston motion profile) for combustion parameters in hydraulic free piston engine," Applied Energy, Elsevier, vol. 211(C), pages 921-928.
    8. Ayodeji Sowale & Athanasios J. Kolios, 2018. "Thermodynamic Performance of Heat Exchangers in a Free Piston Stirling Engine," Energies, MDPI, vol. 11(3), pages 1-20, February.
    9. Jia, Boru & Smallbone, Andrew & Feng, Huihua & Tian, Guohong & Zuo, Zhengxing & Roskilly, A.P., 2016. "A fast response free-piston engine generator numerical model for control applications," Applied Energy, Elsevier, vol. 162(C), pages 321-329.
    10. Fukang Ma & Shuanlu Zhang & Zhenfeng Zhao & Yifang Wang, 2021. "Research on the Operating Characteristics of Hydraulic Free-Piston Engines: A Systematic Review and Meta-Analysis," Energies, MDPI, vol. 14(12), pages 1-23, June.
    11. Zhao, Xiaohuan & Liu, Fang & Wang, Chunhua, 2022. "Effects of different piston combustion chamber heights on heat transfer and energy conversion performance enhancement of a heavy-duty truck diesel engine," Energy, Elsevier, vol. 249(C).
    12. Tripathi, Abhinav & Zhang, Chen & Sun, Zongxuan, 2018. "A multizone model of the combustion chamber dynamics in a controlled trajectory rapid compression and expansion machine (CT-RCEM)," Applied Energy, Elsevier, vol. 231(C), pages 179-193.
    13. Ayodeji Sowale & Edward J. Anthony & Athanasios John Kolios, 2018. "Optimisation of a Quasi-Steady Model of a Free-Piston Stirling Engine," Energies, MDPI, vol. 12(1), pages 1-17, December.
    14. Zhang, Shuanlu & Zhao, Zhenfeng & Zhao, Changlu & Zhang, Fujun & Wang, Shan, 2017. "Cold starting characteristics analysis of hydraulic free piston engine," Energy, Elsevier, vol. 119(C), pages 879-886.
    15. Wu, Zhong & Zhang, Hongguang & Liu, Zhongliang & Hou, Xiaochen & Li, Jian & Yang, Fubin & Zhang, Jian, 2021. "Experimental study on the performance of single-piston free-piston expander—linear generator," Energy, Elsevier, vol. 221(C).
    16. Chi Zhang & Feixue Chen & Long Li & Zhaoping Xu & Liang Liu & Guilin Yang & Hongyuan Lian & Yingzhong Tian, 2018. "A Free-Piston Linear Generator Control Strategy for Improving Output Power," Energies, MDPI, vol. 11(1), pages 1-21, January.

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