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dc.contributor.authorSomers, Kieran P.
dc.contributor.authorCracknell, Roger F.
dc.contributor.authorCurran, Henry J.
dc.identifier.citationSomers, Kieran P., Cracknell, Roger F., & Curran, Henry J. (2019). A chemical kinetic interpretation of the octane appetite of modern gasoline engines. Proceedings of the Combustion Institute, 37(4), 4857-4864. doi:
dc.description.abstractFuel anti-knock quality is a critical property with respect to the effective design of next-generation spark-ignition engines which aim to have increased efficiency, and lower emissions. Increasing evidence in the literature supports the fact that the current regulatory measures of fuel anti-knock quality, the research octane number (RON), and motor octane number (MON), are becoming decreasingly relevant to commercial engines. Extrapolation and interpolation of the RON/MON scales to the thermodynamic conditions of modern engines is potentially valuable for the synergistic design of fuels and engines with greater efficiency. The K-value approach, which linearly weights the RON/MON scales based on the thermodynamic history of an engine, offers a convenient experimental method to do so, although complementary theoretical interpretations of K-value measurements are lacking in the literature. This work uses a phenomenological engine model with a detailed chemical kinetic model to predict and interpret known trends in the K-value with respect to engine intake temperature, pressure, and engine speed. The modelling results support experimental trends which show that the K-value increases with increasing intake temperature and engine speed, and decreases with increasing intake pressure. A chemical kinetic interpretation of trends in the K-value based on fundamental ignition behaviour is presented. The results show that combined experimental/theoretical approaches, which employ a knowledge of fundamental fuel data (gas phase kinetics, ignition delay times), can provide a reliable means to assess trends in the real-world performance of commercial fuels under the operating conditions of modern engines. (C) 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved.en_IE
dc.description.sponsorshipFunding from the European Commission Marie Curie Transfer of Knowledge Scheme (FP7) pursuant to Contract PIAP-GA-2013-610897 GENFUEL is greatly acknowledged. KPS would like to thank Dr. Ultan Burke and Dr. Colin Banyon for fruitful discussions on the topic.en_IE
dc.relation.ispartofProceedings Of The Combustion Instituteen
dc.titleA chemical kinetic interpretation of the octane appetite of modern gasoline enginesen_IE
dc.contributor.funderSeventh Framework Programmeen_IE
dc.local.contactHenry Curran, Dept Of Chemistry, Room 215, Arts/Science Building, Nui Galway. 3856 Email:
dcterms.projectinfo:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/610897/EU/Addressing Fundamental Challenges in the Design of new generation fuels./GENFUELen_IE

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