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  • Summary & Details

Analysis of High-frequency Combustion Noise Generation Mechanism in Pre-chamber Jet Combustion Gasoline Engine (Third Report)

副室ジェット燃焼エンジンの高周波燃焼騒音発生メカニズム解析(第3報)

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Category(J)論文

Translation

Category(E)Paper
Author(J)1) 鳥居 建史, 2) 新谷 祐輔, 3) 木村 範孝, 4) 小林 広樹, 5) 小西 敬三
Author(E)1) Kenji Torii, 2) Yusuke Shintani, 3) Noritaka Kimura, 4) Hiroki Kobayashi, 5) Keizo Konishi
Affiliation(J)1) 本田技研工業, 2) 本田技術研究所, 3) 本田技術研究所, 4) 本田技術研究所, 5) 本田技術研究所
Abstract(J)副室ジェット燃焼エンジンにおける7kHz以上の高周波筒内圧力振動の増大原因を解明した.実稼働時の筒内圧特性解析とCFDによる燃焼反応速度及び火炎分布の解析結果から,その主原因は,燃焼反応速度が著しく上昇することに加え,ジェット火炎ごとの燃焼反応速度がばらつくことによって火炎分布が非対称化する点にあることがわかった.

Translation

Abstract(E)This paper compares the characteristics of in-cylinder pressure measured in actual engines for various combustion modes and the characteristics of flame distribution and fuel reaction rate due to flame propagation calculated by CFD for those same modes, based on previous research. Results show that the significant increase in high-frequency in-cylinder pressure oscillation in pre-chamber jet combustion is due to two factors: a high in-cylinder pressure rise rate that is 2 to 3 times higher than in conventional spark ignition combustion, and an asymmetrical flame distribution caused by differences in fuel reaction rate of jet flames ejected from multiple nozzles of the pre-chamber.

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