3211 圧縮自着火過程における冷炎中間生成物の測定及び解析(S44-1 エンジンの新しい計測技術とモデリング(1),S44 エンジンの新しい計測技術とモデリング)

概要

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Our previous exhaust gas analysis for cool ignition composition on hot ignition suppressed conditions in HCCI with dimethyl ether fuel was successful to validate the existing detailed oxidation model by detecting HCHO, CO and CO_2. However, formic acid (HCOOH) and methyl formate (HCOOCH_3), which are additionally included in the recent version of the model, were not detected because of the poor sensitivity of the Q-pole mass analyzer. In this study, an FT-IR spectrometer has been adopted to enhance the detectable species. It was confirmed that HCOOH and HCOOCH_3 are produced in cool ignition stages of dimethyl ether compression with the yield depending on equivalence ratio, which is in good agreement with the recent model. It is discussed that HCOOH/HCHO branching ratio in decomposition of QOOH species affects the activity of chain reaction system. HCOOCH_3 is formed via RO_2+RO_2 reaction, the rate of which secondarily affects the chain activity.
社団法人日本機械学会の論文
2005-09-18