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Experimental study on the cyclic variations of ethanol/diesel reactivity controlled compression ignition (RCCI) combustion in a heavy-duty diesel engine

Author

Listed:
  • Pan, Suozhu
  • Cai, Kai
  • Cai, Min
  • Du, Chenbo
  • Li, Xin
  • Han, Weiqiang
  • Wang, Xin
  • Liu, Daming
  • Wei, Jiangjun
  • Fang, Jia
  • Bao, Xiuchao

Abstract

The current work was performed to study the cyclic variations of ethanol/diesel reactivity controlled compression ignition (RCCI) combustion on a heavy-duty diesel engine. The effects of diesel injection timing and premixed ratio (PR) on the cyclic variations were researched. Several parameters such as the maximum in-cylinder pressure (Pmax), the maximum heat release rate (HRRmax), the maximum pressure rise rate (PRRmax) and the indicated mean effective pressure (IMEP) were employed to evaluate the cyclic variations by using the coefficient of variation (COV) of each parameter. The results show that the cyclic variations of ethanol/diesel RCCI combustion are sensitive to the diesel injection timing and PR. with advance of diesel injection timing, the COVs of all parameters decrease at first and then increase, the frequency distribution of all parameters firstly becomes more concentrated and then gets more dispersed, the distribution ranges of the crank angle of Pmax, HRRmax, PRRmax are narrowed firstly and then widened. With increment of PR, the COVs of all parameters firstly decrease and then increase, the frequency distribution of all parameters firstly becomes more concentrated and then gets more dispersed. The results of this work reveal that diesel injection timing and PR should be optimized to achieve smaller cyclic variation and more smooth operation of ethanol/diesel RCCI engine.

Suggested Citation

  • Pan, Suozhu & Cai, Kai & Cai, Min & Du, Chenbo & Li, Xin & Han, Weiqiang & Wang, Xin & Liu, Daming & Wei, Jiangjun & Fang, Jia & Bao, Xiuchao, 2021. "Experimental study on the cyclic variations of ethanol/diesel reactivity controlled compression ignition (RCCI) combustion in a heavy-duty diesel engine," Energy, Elsevier, vol. 237(C).
    • Handle: RePEc:eee:energy:v:237:y:2021:i:c:s0360544221018624
    DOI: 10.1016/j.energy.2021.121614
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    References listed on IDEAS

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