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Chemical kinetics of octane sensitivity in a spark-ignition engine

机译：火花点火发动机中辛烷值敏感性的化学动力学

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摘要

This paper uses a chemical kinetic modeling approach to study the influences of fuel molecular structure on Octane Sensitivity (OS) in Spark Ignition (SI) engines. Octane Sensitivity has the potential to identify fuels that can be used in next-generation high compression, turbocharged SI engines to avoid unwanted knocking conditions and extend the range of operating conditions that can be used in such engines. While the concept of octane numbers of different fuels has been familiar for many years, the variations of their values and their role in determining Octane Sensitivity have not been addressed previously in terms of the basic structures of the fuel molecules. In particular, the importance of electron delocalization on low temperature hydrocarbon reactivity and its role in determining OS in engine fuel is described here for the first time. The role of electron delocalization on fuel reactivity and Octane Sensitivity is illustrated for a very wide range of engine fuel types, including n-alkane, 1-olefin, n-alcohol, and n-alkyl benzenes, and the unifying features of these fuels and their common trends, using existing detailed chemical kinetic reaction mechanisms that have been collected and unified to produce an overall model with unprecedented capabilities. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：本文使用化学动力学建模方法来研究火花点火（SI）发动机中燃料分子结构对辛烷值（OS）的影响。辛烷值敏感度有潜力确定可用于下一代高压缩涡轮增压SI发动机的燃料，以避免不必要的爆震情况，并扩大可在此类发动机中使用的工作条件范围。尽管不同燃料的辛烷值概念多年来已经为人所熟悉，但是它们的值的变化及其在确定辛烷值敏感性中的作用以前并未根据燃料分子的基本结构来解决。特别是，本文首次描述了电子离域对低温烃反应性的重要性及其在确定发动机燃料中OS方面的作用。说明了电子离域对燃料反应性和辛烷值敏感性的作用，适用于多种发动机燃料，包括正构烷烃，1-烯烃，正构醇和正烷基苯，以及这些燃料的统一特征和它们的共同趋势，是利用现有的详细化学动力学反应机理进行收集和统一，以产生具有空前能力的整体模型。 （C）2016年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

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