Effect of ethanol on knock in spark ignition gasoline engines

Kenjiro Nakama*, Jin Kusaka, Yasuhiro Daisho

*この研究の対応する著者

研究成果: Article査読

25 被引用数 (Scopus)

抄録

This study examines the effects of ethanol content on engine performances and the knock characteristics in spark ignition gasoline engine under various compression ratio conditions by cylinder pressure analysis, visualization and numerical simulation. The results confirm that increasing the ethanol content provides for greater engine torque and thermal efficiency as a result of the improvement of knock tolerance. It was also confirmed that increasing the compression ratio together with increasing ethanol content is effective to overcome the shortcomings of poor fuel economy caused by the low calorific value of ethanol. Further, the results of one dimensional flame propagation simulation show that ethanol content increase laminar burning velocity. Moreover, the results of visualization by using a bore scope demonstrate that ethanol affects the increase of initial flame propagation speed and thus helps suppress knock.

本文言語English
ページ(範囲)1366-1380
ページ数15
ジャーナルSAE International Journal of Engines
1
1
出版ステータスPublished - 2009 4 1

ASJC Scopus subject areas

  • 自動車工学
  • 燃料技術

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