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김창대(Changdae Kim),김석재(Seokjae Kim),여권구(Gyunkoo Yeo),류명석(Myungseok Lyu) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To meet future U.S. & European NOx emission standards, it is essential to develop catalyst technology that will reduce NOx emission in addition to the other three pollutants(HC, CO, Paticulate). Two materials that attracted great attention as De-NOx catalysts are the ZSM-5 and BaO contained the commercial DOC. The manufactured several catalysts showed the NOx conversion of about 20-28% but the temperature window of those was narrow as 300~400°C. In case of a general diesel passenger car, engine outlet gas temperature is lower than 250°C under ECE mode. Finally, a new low temperature lean NOx catalyst will be described. In this paper, the possibility of the ZSM-5 and BaO contained the commercial DOC under diesel engine conditions as the 4-way catalyst was investigated
김창대(Changdae Kim),권충일(Choongil Kwon),김석재(Seokjae Kim),여권구(Gwonkoo Yeo) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_1
To meet future EURO-III, IV emission standards, it is essential to develop catalyst technology that will reduce diesel engine exhaust gases. In this study, deactivation of diesel oxidation catalyst used in fleet vehicle test was mainly investigated To conform the surface characterization of catalyst, BET, IC & CO chemisorption were used.<br/> The causes of deactivation of a diesel catalyst were several but the main factors were sulfur poisoning, carbon coking & Pt sintering among them. Therefore, the LOT of an endurance sample was increased higher than thai of a fresh Especially, the change of pore diameter & volume by sulfur was observed.
서정민(Jungmin Seo),김석재(Seokjae Kim),김홍집(Hongjip Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
To develop a new Cordierite filter for DPF material, many technical engine controls were considered. Though it has some problems to adapt to the DPF, it has been developed in the world due to its merits such as low cost and fast heat up. In this study, I investigated some new engine control managements to overcome its de-merits and performed feasibility test on engine bench. I confirmed the same level of soot mass limit to SiC and AT using multi step regeneration only, also some additional technique such as oxygen control, exhaust gas flow control, temperature modeling control at inner DPF, accurate DPF inlet temperature control and application of accurate temperature sensor help to increase the performance.