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한철희,전문수,Han, Cheolheui,Chon, Munsoo 한국교통대학교 융복합기술연구소 2013 융ㆍ복합기술연구소 논문집 Vol.3 No.1
Unsteady fluid dynamics analysis of flow characteristics inside a Metal DPF system is done using a commercial CAE software, CFD-ACE+. The time profiles of both temperature and pressure of exhaust gas are given as initial conditions. It was found that the position of connecting pipes and the numbering of exhaust gases did not affect the flow uniformity. The presence of a DPF resulted in the significant flow nonuniformity effect on the flow characteristics at the inlet of the DPF. Present results can be applied to the selection of optimal geometry that produces uniform flow characteristics inside a DPF system.
박정권,김현철,정수진,전문수,Park, JungKwon,Kim, Hyunchul,Jeong, SooJin,Chon, MunSoo 한국교통대학교 융복합기술연구소 2013 융ㆍ복합기술연구소 논문집 Vol.3 No.1
The next generation alternative fuel of diesel, DME (Dimethyl Ether) discharges particulate matter hardly due to chemical structural as oxygen-fuel so it has the eco-friendly property. Despite these advantages, the DME has the technical difficulties to apply to the diesel engine because of a low calorific value, viscosity and compressibility effects. From this point of view, we performed experimental studies on improved reliability of DME common-rail vehicle and lubricity enhancement of DME fuel for empirical distribution of eco-friendly DME fuel. Also we analyzed solubility of lubrication enhancer according to a drop in temperature, try to secure reliability about core parts of DME vehicle by applying lubrication enhancer in the DME common-rail vehicle.
한철희(Cheolheui Han),마상진(Sangjin Ma),전문수(Munsoo Chon),김현철(Hyunchul Kim),최정황(Jeonghwang Choi) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Unsteady fluid dynamics analysis of flows inside a metal DPF is done using a commercial CAE software, CFD-ACE+. The time profiles of both temperature and pressure of exhaust gas are selected as time and boundary conditions. The porosity or permeability of the DPF was obtained by obtaining the pressure drop data from experimental tests. It was found that the flow uniformity is significantly affected by the curvatures of parts that connect the exhaust manifold and the connecting pipes. In future, the optimization of the geometry can be done using the design of experiments.
강은정(Eunjeong Kang),권석주(Seokjoo Kwon),전문수(Munsoo Chon),서영호(Youngho Seo) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
The purpose of this study is the analysis of the characteristics of fuel economy due to driving mode conditions changes in HEV and PHEV compare with the existing internal combustion engine vehicle. These were applied representative driving mode such as FTP-75, HWFET, US06 and SC03 mode in order to the evaluation of fuel economy. In conducted driving test mode, the fuel economy of HEV, PHEV of power type is better than internal combustion engine vehicles. However In the HWFET, US-06 mode belonging to the high-speed driving mode, the fuel economy gap of HEV, PHEV of the power type are more significantly it dropped because power type is concentrated in the low speed. Also In the SC03 mode, the fuel economy of all HEV, PHEV are seen falling trend significantly.
디젤 엔진용 Metal DPF의 재생평형온도(BPT) 특성에 관한 연구
김충희(Chunghui Kim),김현철(Hyunchul Kim),이기수(Geesoo Lee),최정황(Jeonghwang Choi),전문수(Munsoo Chon) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In this study, a sample of the metal diesel particulate filter (MDPF) was fabricated, which was mounted on a 2.9 L mid-sized diesel engine to evaluate and analyze BPT and thus consider its application to actual diesel engine vehicles. The exhaust gas temperature on the front end of MDPF was changed at one hour interval from 20 ℃ to 30 ℃, and the resulting differential pressure and back pressure characteristics of the filter were analyzed. The international sample and D and K type samples were used for the evaluation, which were classified according to the filter structure. The BPT of the filter were 362 ℃ for the international sample, 350 ℃ for the D type sample, and 336 ℃ for the K type sample. Considering the actual vehicle temperature frequency for each section in prior studies, the results satisfied the regeneration condition in all sections other than the crowded downtown sections.
미립화와 환경 1 : 주행 부하에 따른 실제도로 주행 배출가스 특성 평가
옥선일 ( Seonil Oak ),장지환 ( Jihwan Jang ),이종태 ( Jongtae Lee ),박성욱 ( Sungwook Park ),전문수 ( Munsoo Chon ) 한국액체미립화학회 2015 한국액체미립화학회 학술강연회 논문집 Vol.2015 No.-
Despite of recently strengthened vehicle emission regulations, NOx emissions are not decreased in urban areas because of discrepancies between certification emission test modes and real driving conditions. Thus, researches on RDE-LDV(Real-driving Emission-Light-duty Vehicle) have been conducted actively using PEMS(Portable Emissions Measurement Systems). Emission characteristics were analyzed for averaged NOx emissions per unit driving distance from Driving load. Finally, to utilize the test procedure of RDE-LDV in this study, the representative and repeatability should be considered.