Study about the link between injection strategy and knock onset in an optically accessible multi-cylinder GDI engine

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• 作者：G. Marseglia^a ; ^b ; M. Costa^a ; F. Catapano^a ; ^{f.catapano@im.cnr.it} ; P. Sementa^a ; B.M. Vaglieco^a
• 关键词：Gasoline direct injection ; Optical engine ; Flame propagation ; Abnormal combustion ; Knock ; Split injection
• 刊名：Energy Conversion and Management
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：134
• 期：Complete
• 页码：1-19
• 全文大小：7611 K
• 卷排序：134

文摘

Knock in an optically accessible GDI engine is experimentally and numerically analysed. Gasoline injection is considered in representative single and double events. In cylinder pressure cycles and high temporal and spatial resolution combustion images are collected. Flame front propagation is un-axisymmetric and concavity is affected by injection strategy. Double injection may be a measure for knock reduction and pollutants control.