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

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

Energy, 2020, vol. 202, issue C

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.

Keywords: RCCI; Particle emissions; Influencing factors; In-cylinder process; Out-of-cylinder process (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544220308148
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:202:y:2020:i:c:s0360544220308148

DOI: 10.1016/j.energy.2020.117707

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().