酸素および不活性ガス給気による直接噴射式ディーゼル機関の微粒子とNO_xの低減効果

概要

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The effects of intake oxygen and carbon dioxide concentration on both the flame temperature and emission of NO_x and particulates from a direct injection diesel engine are reported. Nitrogen oxide emission from a D. I. diesel engine is correlated with calculated flame temperature, yielding -143 000 cal/mole for the overall activation energy for the processes involved. It is found that when the particulate emission index, EIpe, is plotted against the inverse of flame temperature, the values ln(EIpe) are linear. The slope indicated a positive apparent activation energy for oxygen- and nitrogen-enriched charging. But the correlation of ln(EIpe) with flame temperature for carbon dioxide-enriched charging shows a smaller or negative activation energy than that for oxygen- or nitrogen-enriched charging.
社団法人日本機械学会の論文
1990-11-25