Study of Mechanism Producing Multi-Stage Heat Release in Supercharged HCCI Using Blended Fuel

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  • 混合燃料を用いた過給HCCI における多段熱発生機構の研究
  • 混合燃料を用いた過給HCCIにおける多段熱発生機構の研究 : FTIRによる中間生成物測定,筒内分光測定,素反応数値計算を用いた反応解析
  • コンゴウ ネンリョウ オ モチイタ カキュウHCCI ニ オケル タダン ネッパツセイ キコウ ノ ケンキュウ : FTIR ニ ヨル チュウカン セイセイブツ ソクテイ,ツツ ナイ ブンコウ ソクテイ,ソハンノウ スウチ ケイサン オ モチイタ ハンノウ カイセキ
  • -Reaction Analyses by FTIR Method, In-cylinder Spectroscopy and Chemical Kinetic Simulation-
  • ―FTIR による中間生成物測定，筒内分光測定，素反応数値計算を用いた反応解析―

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This study investigated the mechanism producing the multi-stage heat release behavior of a supercharged HCCI engine operated on blended fuels of DME and methane. These aspects were investigated by making spectroscopic measurements of in-cylinder gas, FTIR analysis of intermediate products and by conducting chemical kinetic analyses. The results revealed that the DME is mainly consumed during cool flame and accumulate HCHO. In addition, in the first-stage heat release of the main combustion, HCHO is consumed and CO is produced. Meanwhile, methane is not appreciably consumed in the first-stage heat release of the main combustion and consumed just prior to the second-stage heat release. That explains why the heat release of the hot flame occurred in two distinct stages.

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