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Spark-based Advanced Ignition Control for Future Diluted Gasoline Engines

Zheng, Ming; Chen, Guangyun; Tjong, Jimi; Li, Liguang; Yu, Shui; Yu, Xiao; Yang, Zhenyi


To meet the mandatory CO2 emissions regulations in the future, current gasoline engines require significant work for efficiency improvement. One critical part of combustion optimization is to improve the spark ignition process, especially for the engines that utilize charge dilution concept incorporated with strong cylinder flow. Such high efficiency combustion process requires the ignition systems to effectively ignite the mixture and secure the flame kernel until developing to self-sustainable propagation. In this paper, the extent of spark stretching and the ability to withhold from restrike in high-speed flow are investigated for various sparking strategies. A thick plasma channel that is generated by boosted glow current is less prone to be blown off by the strong flow, consequently, the restrike frequency is lowered. In comparison with a low current long lasting spark generated by the dual-coil continuous discharge strategy, the boosted current strategy can lead to a faster flame kernel growth. Single-cylinder engine experiments indicate that the combustion phasing controllability and the stability of lean/diluted engine operation can be improved by using the boosted current ignition strategies with conventional spark plug. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000088316
Veröffentlicht am 08.06.2019
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Kolbenmaschinen (IFKM)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2018
Sprache Englisch
Identifikator ISBN: 978-3-8169-3449-3
KITopen-ID: 1000088316
Erschienen in Ignition Systems for Gasoline Engines : 4th International Conference, December 6 - 7, 2018, Berlin, Germany. Ed.: M. Günther
Verlag expert-Verlag
Seiten 1-25
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