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Inter-cycle variability of in-cylinder pressure parameters in an ethanol fumigated common rail diesel engine

Bodisco, Timothy and Brown, Richard J 2013, Inter-cycle variability of in-cylinder pressure parameters in an ethanol fumigated common rail diesel engine, Energy, vol. 52, pp. 55-65, doi: 10.1016/j.energy.2012.12.032.

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Title Inter-cycle variability of in-cylinder pressure parameters in an ethanol fumigated common rail diesel engine
Author(s) Bodisco, TimothyORCID iD for Bodisco, Timothy orcid.org/0000-0002-5163-4762
Brown, Richard J
Journal name Energy
Volume number 52
Start page 55
End page 65
Total pages 11
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2013-04
ISSN 0360-5442
Keyword(s) Inter-cycle variability
Ethanol fumigation
In-cylinder pressure
Diesel engine
Summary The effects of ethanol fumigation on the inter-cycle variability of key in-cylinder pressure parameters in a modern common rail diesel engine have been investigated. Specifically, maximum rate of pressure rise, peak pressure, peak pressure timing and ignition delay were investigated. A new methodology for investigating the start of combustion was also proposed and demonstrated—which is particularly useful with noisy in-cylinder pressure data as it can have a significant effect on the calculation of an accurate net rate of heat release indicator diagram. Inter-cycle variability has been traditionally investigated using the coefficient of variation. However, deeper insight into engine operation is given by presenting the results as kernel density estimates; hence, allowing investigation of otherwise unnoticed phenomena, including: multi-modal and skewed behaviour. This study has found that operation of a common rail diesel engine with high ethanol substitutions (>20% at full load, >30% at three quarter load) results in a significant reduction in ignition delay. Further, this study also concluded that if the engine is operated with absolute air to fuel ratios (mole basis) less than 80, the inter-cycle variability is substantially increased compared to normal operation.
Language eng
DOI 10.1016/j.energy.2012.12.032
Field of Research 090599 Civil Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2013, Elsevier Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30082235

Document type: Journal Article
Collection: School of Engineering
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