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Model soot이 Pt/CeO₂ 촉매와 tight contact한 상태에서의 O₂에 의한 산화특성 연구
송창훈(Changhoon Song),이동일(Dongil Lee),김태수(Taesoo Kim),송순호(Soonho Song),전광민(Kwang Min Chun) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
The catalytic behaviors of Pt/CeO₂ have been studied for soot oxidation by O₂. Oxidation of soot (carbon black) is studied using a flow reactor system simulating the condition of diesel exhaust. In this study, the temperature programmed oxidation (TPO) scheme is used. And soot oxidation rate is evaluated by monitoring both CO and CO₂ concentrations. Pt/CeO₂ catalyst shows promising performance to accelerate the soot-O₂ reaction. Under tight contact condition with catalyst, soot oxidation reaction occurred more actively. The maximum soot oxidation temperature is decreased by about 150℃. The main reason that causes the increase of soot oxidation activity is the active oxygen from cerium oxide.
디젤엔진의 환기시스템에서 오일이송량 저감에 관한 실험적 연구
김정선(Jungsun Kim),송창훈(Changhoon Song) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
This paper is Experimental Study on Reduction of Oil Carryover in Diesel Breather system. The Influence of design factor is demonstrated and the understanding of correlation between oil carryover and blow-by. When an engine is running, blow-by gases flow through the unavoidable clearance gaps between the pistons and the cylinder wall into the crankcase. If The Blow-by isn't vented, this case many bad effects such as LOC, corrosion by that and crank case explosion by rising pressure. Current emissions legislation demands that blow by gases are returned to the air intake system. But Oil carryover into blow by gases is pollution of Intake system. So Oil carryover depend on the quantity of Blow by. It is a following experiment to reduce oil carryover method, 1. Oil carryover by Crank case pressure control in rated power, 2. Baffle plate tuning for reduction of oil carryover in Rated power, 3. Baffle plate and PCV system compounding Test, 4. Influence of oil carry over in Max. blow-by, and 5. General Durability Test. The Experimental Result is following, Optimization of Crank case pressure, Select of Oil separator, and the select of Baffle plate.<br/> This study will show experimental result to possibilities for the optimal design and Automotive part. And the experimental results presented optimization of diesel crankcase ventilation system.
NO와 O₂ 조건 하에서 Pt/CeO₂ 촉매의 soot 산화특성에 관한 실험적 연구
정진우(Jinwoo Jung),송창훈(Changhoon Song),송순호(Soonho Song),전광민(Kwang Min Chun) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Details of their reaction kinetics remain unresolved. Among others, the soot oxidation rate over catalyst is particularly important in the evaluation of the performance of the catalysts and the efficient control of CPF regeneration. The activation energy of the oxidation reaction with the catalyst is reduced in the presence of NO+O₂ also, the maximum soot oxidation temperature is decreased by about 120℃. The main reason that causes the increase of soot oxidation activity is the NO₂ from NO which is oxidized by platinum. NO₂ oxidizes soot with much lower activation energy than O₂ and the NO to NO₂ conversion takes place many times (recycling) while NO molecule passes through platinum
커먼레일 디젤엔진에서 오일 공기혼입의 영향성에 대한 실험적 연구
김정선(Jungsun Kim),송창훈(Changhoon Song),김종혁(Jonghyuk Kim),민병두(Byeongdu Min) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Today's modern engines are designed for higher Power and Engine speed, thus optimized concerning the dimensions of engine bearings in terms of low friction and sufficient bearing oil pressure. Oil aeration is the process by which air is circulated through, mixed with or dissolved in a liquid or substance. Oil aeration measuring methods are only capable to determine the share of dissolved (free) gas in the Common-Rail Direct Injection Diesel Engine Oil(Lubricant). The effects of oil Aeration on engine drive causes malfunctions of several components. The high oil aeration can cause hydraulic lash adjuster malfunction and connecting rod bearing failure. A successful optimization of the oil circulation concerning the oil aeration presupposes a safe and reproducible measuring procedure. This paper results of recent research and development work concerning the occurrence of oil aeration within the lubricant system of New Development Engine.
Common rail 디젤엔진에서 오일소모 기여도 분석 및 오일소모 저감에 관한 실험적 연구
김정선(Jungsun Kim),송창훈(Changhoon Song),김재진(Jaejin Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper is Analysis of LOC Contribution and Reduction of LOC in a Common-rail Direct Injection Diesel Engine. The determination of lube oil consumption in a modern combustion engine is extremely important, as strict regulations call for reduction of hazardous exhaust emissions. The focus of Engine research and development is on Reducing the LOC. but The influence of LOC is To much parameter. The study was done to reval the trend of LOC with Bore Honing Quality, Piston ring modification and Compounding of Piston-Piston ring. It is a following experiment to analysis of LOC Contribution, 1. Influence of LOC by Engine running Effect, 2. Influence of LOC by Engine running Condition, 3. Influence of LOC by Cylinder Bore Honing Quality, 4. Influence of LOC by Piston ringpack compounding, 5. Influence of LOC by Piston ring modification This study will show Test result to possibilities for the optimal design and Automotive part.