Int J Engine Research DOI 10.11770123456789123456_AAM.pdf (3.17 MB)
Effects of intake-port throttling on combustion behaviour in diesel low-temperature combustion
journal contributionposted on 2017-12-14, 08:56 authored by Oluwasujibomi Sogbesan, Colin GarnerColin Garner, Martin H. Davy
This article describes the effects of intake-port throttling on diesel low-temperature combustion at a low and medium load condition. These conditions were known for their characteristically high hydrocarbon emissions predominantly from over-mixed and under-mixed mixture zones, respectively. The investigation was carried out to supplement current findings in the literature with valuable information on the formation of high hydrocarbon emissions with increasing swirl levels generated by intake-port throttling. This was achieved through the use of cycle-resolved high hydrocarbon measurements in addition to cycle averaged emissions and in-cylinder pressure-derived metrics. While there was negligible overall effect at the moderately dilute low-load conditions, increasing swirl has been shown to be beneficial to premixing efficacy under highly dilute conditions with extended ignition delay. This potential advantage was found to be nullified by the swirl-induced confinement of fuel and combustion products to the central region of the cylinder leading to poor late cycle burn rates and increased smoke emissions. High hydrocarbon emissions from the squish and head quench regions were reduced by an increase in swirl ratio.
EPSRC (grant number: EP/F031351/1) and the Royal Academy of Engineering
- Mechanical, Electrical and Manufacturing Engineering
Published inInternational Journal of Engine Research
Pages146808741773288 - 146808741773288
CitationSOGBESAN, O., GARNER, C.P. and DAVY, M.H., 2017. Effects of intake-port throttling on combustion behaviour in diesel low-temperature combustion. International Journal of Engine Research, 19 (8), pp.827-838.
PublisherSAGE © IMechE
- AM (Accepted Manuscript)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by-nc/4.0/
NotesThis article was published in the International Journal of Engine Research [SAGE © IMechE] and the definitive version is available at: https://doi.org/10.1177/1468087417732881