斜めスキッシュ形燃焼室のノック抑制機構　　燃焼後半の火炎加速によるノック抑制

DOI Web Site Web Site 被引用文献4件 参考文献9件

書誌事項

タイトル別名
  • Mechanism of Knock-Suppression by the Slant-Shaped Squish Combustion Chamber. Knock-Suppression by Flame Acceleration in the Latter Half of Combustion.
  • ナナメ スキッシュケイ ネンショウシツ ノ ノック ヨクセイ キコウ ネンショウ コウハン ノ カエン カソク ニ ヨル ノック ヨクセイ

この論文をさがす

抄録

The slant-shaped squish chamber recently developed by our company improves charging efficiency and raises compression ratio of its gasoline-engines. We clarified its knock suppression mechanism using rapid compression-and-expansion machine, autoignition simulation, and 3-dimensional turbulent flame propagation simulation. The results indicate the following: 1. Timing of flame acceleration is a key of knock suppression, that is, optimum timing of flame acceleration exists in the latter half of combustion, because expansion stroke suppresses the temperature rise in the end gas. This universal mechanism improves knock-limited ignition timing and compression ratio of the above engines. 2. A cause of the flame acceleration in the slant-shaped squish chamber is strengthened turbulence occurring in front of the flame and in reverse squish flow which separates at the squish lip. 3. The reverse squish flow, which is well known to be induced by the suction due to the larger expansion ratio of squish region than the other region of combustion chamber, is enhanced by the thermal expansion of burning mixture.

収録刊行物

被引用文献 (4)*注記

もっと見る

参考文献 (9)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ