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Study on influencing factors of particle emissions from a RCCI engine with variation of premixing ratio and total cycle energy

Author

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  • Han, Weiqiang
  • Lu, Yao
  • Jin, Chao
  • Tian, Xiaocong
  • Peng, Yiqiang
  • Pan, Suozhu
  • Liu, Haifeng
  • Zhang, Peng
  • Zhong, Yingzi

Abstract

Relevant researches have shown that the prolonged Ignition Delay (ID) is always directly related to the reduction in accumulation mode particle (AMP) and the increase in nucleation mode particle (NMP) emission of Reactivity Controlled Compression Ignition (RCCI) engines. However, seemingly opposite results were discovered in our recent experiments. It appears that ID has no decisive effect on particulate emissions in RCCI engines. To study other main factors which together determine particulate emissions, further detailed experiments were carried out in the RCCI engine with variation of premixing ratio (Rp) and total cycle energy (Etotal). The results show that the formation of engine particles should be divided into in-cylinder and out-of-cylinder processes. Soot agglomerates are mainly formed during in-cylinder process, while the complex materials, finally collected by the particle analyzer, are mainly formed during out-of-cylinder process. Besides, the influencing factors in both in-cylinder and out-of-cylinder processes together determine the formation of particles, such as the maximum combustion temperature (Tmax), one in-cylinder impact factor, the exhaust gas temperature and the volatile organic fraction (VOF) concentration, two out-of-cylinder impact factors that conspire to produce a decrease in NMP emission and an increase in AMP emission.

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  • Han, Weiqiang & Lu, Yao & Jin, Chao & Tian, Xiaocong & Peng, Yiqiang & Pan, Suozhu & Liu, Haifeng & Zhang, Peng & Zhong, Yingzi, 2020. "Study on influencing factors of particle emissions from a RCCI engine with variation of premixing ratio and total cycle energy," Energy, Elsevier, vol. 202(C).
    • Handle: RePEc:eee:energy:v:202:y:2020:i:c:s0360544220308148
    DOI: 10.1016/j.energy.2020.117707
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    References listed on IDEAS

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    Cited by:

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    3. 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).
    4. Aydın, Hüseyin, 2021. "An innovative research on variable compression ratio in RCCI strategy on a power generator diesel engine using CNG-safflower biodiesel," Energy, Elsevier, vol. 231(C).
    5. Shirvani, Sasan & Shirvani, Saeid & Shamekhi, Amir H. & Reitz, Rolf & Salehi, Fatemeh, 2021. "Meeting EURO6 emission regulations by multi-objective optimization of the injection strategy of two direct injectors in a DDFS engine," Energy, Elsevier, vol. 229(C).
    6. Zhong, Yingzi & Han, Weiqiang & Jin, Chao & Tian, Xiaocong & Liu, Haifeng, 2022. "Study on effects of the hydroxyl group position and carbon chain length on combustion and emission characteristics of Reactivity Controlled Compression Ignition (RCCI) engine fueled with low-carbon st," Energy, Elsevier, vol. 239(PC).

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