筒内直接噴射式天然ガス機関の燃焼改善と排気特性に関する研究 : 吸気絞りと排気再循環(EGR)の効果 : 熱工学,内燃機関,動力など

元データ 2001-07-25 社団法人日本機械学会

概要

A natural gas direct injection test engine equipped with a newly developed natural gas injector was built. The high THC emission at part-load condition and the high NO_x emission at high-load condition are left as the problems for a direct injection natural gas engine. The THC reduction and combustion improvement by throttling and the NO_x reduction by EGR were investigated. The following results were obtained : (1) The combustion at light- and medium-load conditions is improved by throttling. It is possible to improve the thermal efficiency at light-load condition in spite of pumping loss by throttling. The concentration of THC emission is greatly decreased in this condition ; (2) The great NO_x reduction can be obtained without combustion deterioration by appropriate EGR at high-load condition ; and (3) It is possible to decrease both THC and NO_x emissions by both throttling and EGR at part-load condition.

著者

後藤 雄一 (独)交通安全環境研究所
佐藤 由雄 (独)交通安全環境研究所
佐藤 由雄 交通安全環境研究所
後藤 雄一 交通安全環境研究所環境エネルギー部
後藤 雄一 交通安全環境研
佐藤 由雄 交通安全環境研
後藤 雄一 (独)交通安全環境研究所環境研究領域
佐藤 由雄 独立行政法人 交通安全環境研究所

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