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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

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posted 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.

Funding

EPSRC (grant number: EP/F031351/1) and the Royal Academy of Engineering

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

International Journal of Engine Research

Pages

146808741773288 - 146808741773288

Citation

SOGBESAN, 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.

Publisher

SAGE © IMechE

Version

  • AM (Accepted Manuscript)

Publisher statement

This 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/

Acceptance date

2017-08-30

Publication date

2017

Notes

This 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

ISSN

1468-0874

eISSN

2041-3149

Language

  • en

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