http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
환원제 분사 조건 변화에 따른 LNT 촉매의 De-NOx 특성
고상철(SangChul Ko),오광철(KwangChul Oh),서충길(ChoongKil Seo),김덕진(Deokjin Kim),염경민(Kyoungmin Yeom),이춘범(Chunbeom Lee) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Nitrogen oxides act as a precursor to other toxic pollutants, such as nitric acid, which causes acid rain. For these reasons, they are subject to environmental regulations for motor vehicles. Lean-burn engines to meet these regulations are needed to reduce the amount of emitted nitrogen oxides. Therefore other types of catalytic converters are needed to reduce these types of emissions. One of these is the Lean NOx Trap (LNT) or NOx absorber catalytic converter. The LNT is operated periodically, by switching the engine from lean-burn operation to rich operation. The purpose of this paper is to understand the LNT catalyst characteristics with gasoline reductant. LNT catalyst used in the experiment is mounted on BMW Lean GDi vehicles. The experiment results of using LPG gas burner, this LNT catalyst is effected by the exhaust gas temperature, O₂ concentration in exhaust gas and the amount of reductant injection. This LNT catalyst, oxygen concentration of 2%, 4% and 6% of which 6% of the NOx storage capacity is higher and high NOx conversion rate at 350℃. NOx conversion characteristics vary with the cycle time and injection, the shorter lean period(15sec) when the high NOx conversion.