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플라즈마 버너를 이용한 강제재생방식 시스템 재생제어에 관한 연구 DPF
윤병규(Byoungkyu Yun),김홍석(Hongsuk Kim),홍순철(Sunchul Hong),정용일(Youngil Jeong) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
To meet stringent diesel particulate matter regulations, diesel particulate filter(DPF) system are essential aftertreatment technology. Passive type DPF system is not able to regenerate at all driving condition especially for low load driving conditions. Therefore, this system is necessary to forcibly burn the particulate held in the DPF, followed by active regeneration. This study carried out a estimation of field application of active type DPF system with a plasma assisted burner. Vehicle tests are performed to verify active type DPF system durability for the winter. This study optimizes fuel injection rate to prevent fuel penalty. Also, high filtration efficiency was presented through engine bench test, after 20,000㎞ driving test.
바나듐 기반의 urea-SCR과 DOC가 결합된 Heavy-Duty 디젤 배기가스 후처리 시스템의 SCR De-NOx 성능 향상에 관한 수치적 연구
윤병규(Byoungkyu Yun),김종민(Chongmin Kim),김만영(Man Young Kim),조규백(Gyubaek Cho),김홍석(Hongsuk Kim),정용일(Youngil Jeong),박윤범(Yun Beom Park) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
During the past few years emission regulations have become more stringent as a result of increased environmental issue and energy saving. To meet stringent diesel emission regulations, the diesel exhaust gas aftertreatment systems such as LNT(Lean NOx Trap), LNC(Lean NOx Catalyst) and SCR(Selective Catalytic Reduction) were developed. Especially, it is well known that the urea-SCR system for diesel engine aftertreatment is very effective system for reduction of NOx in diesel exhaust gas. Also, DOC which can meet regulations of exhaust gas induces fast SCR reaction through NO oxidation. In this study, therefore, numerical experiments were carried out to estimate the SCR De-NOx performance in DOC plus SCR systems. After validating the present approach by comparing the present results with the experimental results, such various parameters as space velocity, H₂O concentration, NO₂/NOx ratio and relative volume of DOC are explored to increase the SCR De-NOx performance.