Research on Self-ignition Close to Idling Engine Speed in Gasoline Engine

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  • Nakajima Susumu
    （株）本田技術研究所四輪R&D センター第3 技術開発室 第2 ブロック
  • Tamura Tomoyuki
    （株）本田技術研究所四輪R&D センター第3 技術開発室 第2 ブロック

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Other Title
  • ガソリンエンジンのアイドル回転近傍での自着火に関する研究
  • ガソリンエンジン ノ アイドル カイテン キンボウ デ ノ ジチャッカ ニ カンスル ケンキュウ

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Abstract

The research discussed in this paper studied the abnormal combustion which caused a noise of self-ignition. The cause is because the upper part of a piston is impacted to the sleeve on the thrust side, when delayed self-ignition occurs. When engine conditions are low rotation, high load, and high temperature, a noise of self-ignition is generated. On the condition, in order to avoid a knock, delayed ignition timing is required. As a result, the probability that delayed self-ignition will be generated increases. Finally, the probability that a low rotation self-noise of ignition will be generated also increases.

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