Study on urea deposits risk of after-treatment system based on deposits boundary method

Kai Lu, Shuzhan Bai, Zhicheng Zang and Guoxiang Li

Energy, 2023, vol. 267, issue C

Abstract: The majority of previous technical solutions improved the exhaust ATS's anti-deposits by innovating the nozzle's spray atomization performance or optimizing the mixing chamber's structural design. These methods are difficult to meet product development needs due to the escalation of emission laws and harsh operating conditions. This paper proposes a deposits control method based on the deposits boundary of the ATS structure. The engine bench test was used to test the deposition of the ATS at four different rotational speeds with exhaust flow rate, temperature, and urea injection volumes. The test results were plotted as a deposits boundary map to form three deposition risk regions: high, medium and low. The middle line of the medium risk region was used as the deposits control strategy value, which is used for the urea injection of the entire ATS. Under WHTC cycle and WHSC cycle conditions, urea consumption with deposits boundary control strategy was reduced by 11.2% and 15.3%, respectively, compared to the consumption without deposits boundary control strategy. Based on this deposits boundary, the engine can evaluate the quantity of urea injection under each working situation within the deposits risk range, allowing it to achieve emission regulations and avoid ATS deposits failures.

Keywords: SCR; Urea; Deposits; NOx; ATS (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S036054422300018X
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:267:y:2023:i:c:s036054422300018x

DOI: 10.1016/j.energy.2023.126624

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 ().