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기계식 연료펌프를 사용하는 혼소엔진에서 노즐특성에 따른 경유 분사특성 측정
조승환 ( S. H. Cho ),유승헌 ( S. H. Yoo ),이범호 ( B. H. Lee ),김동현 ( D. H. Kim ),이대엽 ( D. H. Lee ) 한국분무공학회 2012 한국액체미립화학회지 Vol.17 No.2
The characteristics of spray behavior and injected amount were studied with two types of nozzles for using in a compression ignition engine with dual fuel technology for construction machines. A penetration length of spray tends to shorten due to a decrease of injected amount of a diesel fuel with dual fuel engine application. In order to ignite the gaseous fuel premixed with air during intake process, a diesel fuel, which was compression ignited, needs to penetrate somehow similar depth compared with the case of a diesel fuel-only-injection. In this work, a nozzle with reduced hole diameter and increased number of holes was tested and demonstrated that, compared to diesel 100% case, its penetration lengths are comparable to 74% and 79%, respectively, of those of 100% and 50% supply of a diesel fuel with the baseline nozzle that has four holes and 30.4% increased diameter. This will presumably enhancement the combustion in a dual fuel engine. A design suggestion was also made in this work to achieve similar penetration length of spray with diesel 100% case to prevent combustion from being deteriorated in a dual fuel engine.