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비도로용 디젤엔진의 분사시기 및 인젝터 변경에 따른 배출가스 특성 연구
김훈명(Hoon Myung Kim),강정호(Jeong Ho Kang),한다혜(Da Hye Han),정학섭(Hak Sup Jung),표수강(Su Kang Pyo),안중규(Jueng Kyu Ahn) 한국연소학회 2014 한국연소학회지 Vol.19 No.2
Environmental regulations are being reinforced for the solution of environmental pollution, that are global issues. Exhaust gas regulations of off-road engines also demand stepwise reduction emission from beginning of Tier 4 interim(2013). Characteristically, Tier 4 regulation apply the NRTC mode which is a transient cycle. And technical studies using NRTC mode are uncommon. In this study, for satisfy the Tier 4 final regulation on the NRTC mode, experimental study was conducted using a 3.4 L off-road engine. Fuel injection timing and injector hole number are chosen as parameters for investigation of combustion and exhaust gas characteristics on off-road diesel engine.
56kW Off-road 디젤엔진의 Tier 4 Final NOx 배기규제를 만족시키기 위한 SCR De-NOx 성능 향상에 관한 수치해석 연구
안태현(Tae Hyun An),고건영(Gun Yung Go),김만영(Man Young Kim),김홍석(Hongsuk Kim),강정호(Jeong-Ho Kang),정학섭(Hak Sup Jung) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Diesel engine is being used widely in many industrial fields, as it provides merits in the aspects of higher thermal efficiency and less CO₂ emission. Due to environmental problems caused by toxic exhaust emissions occurred from diesel engines, however, the regulations on off-road diesel engines are being strengthened from Tier 4 interim to Tier 4 final, and it is impossible to meet the emission regulations without post-processing technology such as SCR. Therefore, this study has been conducted to improve De-NOx performance of SCR catalyst during non-road transient cycle mode. In this study, the characteristic of the emission gases with LOT curve, DOC/DPF, and ANR was analyzed. Finally, it can be found that above-mentioned various parameters significantly affect the De-NOx performance of SCR catalyst, then optimization of these parameters to meet the Tier 4 Final emission regulation are required.