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MTZ worldwide
Published in: MTZ worldwide 7-8/2015

01-06-2015 | Cover Story

Octane requirements of modern downsized boosted gasoline engines

Authors: Prof. Roger Cracknell, Dr. Wolfgang Warnecke, Jan-Hendrik Redmann, Dr. Tor Kit Goh

Published in: MTZ worldwide | Issue 7-8/2015

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Excerpt

Over the past 15 years, Shell has published the results of various studies which show that for modern downsized gasoline engines, a high research octane number (RON) increases engine efficiency in the regions of the operating range where combustion is limited by engine knock. However for a given level of RON there is no advantage to having a fuel with a high motor octane number (MON), and there can even be a disadvantage. This can be explained from an analysis of the chemical kinetics of gasoline autoignition in the specific temperature and pressure regimes of a modern downsized boosted engine. In the following Shell summarises findings from three recent collaborative projects which support this emerging understanding. …
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Literature
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Davies, T.; Cracknell, R.; Lovett, G.; Cruff, L.; Fowler, J.: Fuel Effects in a Boosted DISI Engine. SAE Technical Paper 2011-01-1985
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Andrae, J. C. G.; Head, R. A.: HCCI experiments with gasoline surrogate fuels modeled by a semidetailed chemical kinetic model. In: Combust. Flame 156 (2009), No. 4, pp. 842–851CrossRef
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Leppard, W.: The Chemical Origin of Fuel Octane Sensitivity. SAE Technical Paper 902137 (1990)
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Kalghatgi, G. T.: Fuel Anti-Knock Quality — Part II. Vehicle Studies — How Relevant is Motor Octane Number (MON) in Modern Engines? }SAE Technical Paper 2001-01-3585 (2001)
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Metadata
Title
Octane requirements of modern downsized boosted gasoline engines
Authors
Prof. Roger Cracknell
Dr. Wolfgang Warnecke
Jan-Hendrik Redmann
Dr. Tor Kit Goh
Publication date
01-06-2015
Publisher
Vieweg Verlag
Published in
MTZ worldwide / Issue 7-8/2015
Electronic ISSN: 2192-9114
DOI
https://doi.org/10.1007/s38313-015-0023-9

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