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A free piston engine generator powered hybrid wheel loader with independent electric drive

Author

Listed:
  • Wang, Feng
  • Lin, Zichang
  • Li, Jiaqi
  • Zhang, Chen
  • Xiao, Jin
  • Xu, Bing

Abstract

Series hybrid powertrain is a practical way for wheel loader electrification. Conventional internal combustion engine (ICE) technique is mature but the efficiency is limited. Free piston engine generator (FPEG) is regarded as a promising technology that can be applied as decarbonized range extenders attributed to its high thermal efficiency and ultimate fuel flexibility. In this study, a FPEG-based series hybrid powertrain is proposed for wheel loaders to reduce fuel consumption. Multiple FPEG units are parallel connected to power the electric powertrain. The optimal unit commitment of the FPEG set is investigated via dynamic programming. A rule-based strategy called discrete power follower (DPF) is proposed. The influence of FPEG unit number on powertrain performances is studied. Energy efficiency comparison between the FPEG-based and the ICE-based series hybrid powertrains is carried out. Results show that the fuel consumption of the proposed FPEG-based series hybrid powertrain is 10.5 % lower than the ICE-based powertrain. The mean efficiency of wheel loader powertrain improves from 31.7 % to 35.1 %.

Suggested Citation

  • Wang, Feng & Lin, Zichang & Li, Jiaqi & Zhang, Chen & Xiao, Jin & Xu, Bing, 2024. "A free piston engine generator powered hybrid wheel loader with independent electric drive," Energy, Elsevier, vol. 286(C).
    • Handle: RePEc:eee:energy:v:286:y:2024:i:c:s0360544223028670
    DOI: 10.1016/j.energy.2023.129473
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    References listed on IDEAS

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