超高EGR・低酸素濃度雰囲気ディーゼル燃焼の燃料噴射および圧縮比に対する依存性(熱工学,内燃機関,動力など)

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This paper investigates the effects of the injection timing, injection pressure, and compression ratio on low oxygen diesel combustion with ultra-high EGR. The resuts showed while increases in ignition delays by advanced or retarded injection timings can effectively reduce smoke emissions, advanced injection timings have the advantages over retarded injection timings for maintaining thermal efficiency and preventing misfiring. To establish smokeless combustion it is essential that ignition occurs after the end of fuel injection. Although the smoke emissions decrease with increasing injection pressure in the oxygen content range 10-21%, the oxygen content that realizes smokeless emissions is lower than 10% regardless of injection pressure. Reductions in compression ratios are effective to increase ignition delay, to reduce the in-cylinder temperature, and to expand the smokeless range for EGR and IMEP while the thermal efficiency deteriorates with excessively low compression rations.
社団法人日本機械学会の論文
2006-02-25