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OBD에 기초한 승용차 엔진의 계통별 고장 및 진단 사례 연구
민종식,승삼선,문성준 三陟大學校 2005 論文集 Vol.38 No.-
In this study, we have performed a systematic case study on troubles and diagnoses of passenger car's engine based on OBD. We have acquired 1,242 data in order to analysis accurate troubles' causes and apposite diagnoses. 128 data of them are got using 0BD apparatus, and the others of them are collected on related website. As results, distribution of trouble cases shows had idling(32%), poor acceleration(21%), stop in running(19%), faulty start(11%), inferior fuel economy(9%), and insufficient power in order of magnitude. And in the systematic cases, it is not difficult to detect troubles in a single part. But we know that special apparatus such as multichannel scanner is needed in complicated troubles. Furthermore we think that the survey is continued in various ways for more systematic case study on troubles and diagnoses.
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OBD에 기초한 승용차 엔진의 고장유형 분석과 진단 사례 연구
민종식(Min, Jong-Sik),승삼선(Seung, Sam-Sun) 한국산학기술학회 2006 한국산학기술학회논문지 Vol.7 No.6
본 논문은 OBD(On-Board Diagnostics)를 통해 얻은 데이터(직접 취득 128대, 관련 사이트 획득 데이터 1,114대)를 토대로 승용차 엔진의 고장 유형별 분포를 분석하고, 이를 다시 승용차 엔진의 계통별 및 복잡한 경우의 고장 현상으로 구분하여 그에 따른 대표적인 진단 사례 방안을 제시하고 있다. 그 결과, 고장 유형별 분포는 공회전시 부조가 32%(394대), 가속 불량이 21% (261대), 주행중 시동 꺼짐이 19%(234대), 시동 불량이 11 %(133대), 연비 불량이 9%(116대), 출력 부족이 8%(104대)의 순으로 나타났다. 또한 고장 현상을 입력, 제어, 출력, 기계적인 계통으로 나누어 분석하여본 결과, 계통별 고장현상 및 진단에서는 단순 부품에 의한 고장은 진단하는데 크게 어렵지 않으나 제어 계통에서는 복합적인 문제가 발생되면 OBD와 연계된 전용장비로 해당구간을 취하여 데이터를 얻어 파형을 겹쳐보는 등의 방법을 이용하여 분석함으로써 대표적인 진단사례 방안을 제시할 수 있었다. In this study, we have performed a systematic case study on troubles and diagnoses of passenger car’s engine based on OBD. We have acquired 1,242 data in order to analysis accurate troubles’ causes and apposite diagnoses. 128 data of them are got using OBD apparatus, and the rest of them are collected on related website. As results, distribution on trouble cases shows bad idling(32%), poor acceleration(21 %), stop in running(l9%), faulty start(11%), inferior fuel economy(9%), and insufficient power(8%) in order of magnitude. And in the systematic cases, it is not difficult to detect troubles in a single part. But we know that special apparatus such as multichannel scanner is needed in complicated troubles. Furthermore we think that the survey is continued in various ways for more systematic case study on troubles and diagnoses.
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홈이 있는 내부 원통에서 홈의 깊이가 Taylor Vortex 형성에 미치는 영향
승삼선,민종식,유신오 三陟大學校 産業科學技術硏究所 2003 産業科學技術硏究論文集 Vol.8 No.2
We have used the technique of visualization to study influences on Taylor vortex flow formation in a fluid contained between concentric cylinders with grooved rotating inner cylinders. Where the grooved rotating inner cylinders mean having the different radius ratio compared with another straight part of inner cylinder. And they have different groove's depth in each grooved inner cylinders. Major parameters in these experiments are radius ratio by the shapes of inner cylinder. and angular velocity of inner rotating cylinder. So we found that results of this experimental study as follows. 1) A radius ratio has an effect on width of bands in rotating inner cylinder. In grooved sections. band width is wider than other straight section of inner cylinder. Especially in case of 1G9 and 1G12, groove's depth is related to unifying one wide band in grooved section. 2) In higher angular velocity. strong source flow occurred toward center of grooved section in case of 1G9 and 1G12. So it is guessed that groove's depth plays a important role in the process to promote turbulent Taylor vortex.
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KSAE 대학생 Formula 차량의 롤 케이지 구조 설계 및 제작
강호진(Ho-Jin Kang),조석수(Seok-Swoo CHO),민종식(Jong-Sik MIN),박재성(Jae-Sung PARK),박형도(Hyung-Do PARK),김덕주(Deok-Joo KIM),한창훈(Chang-Hoon HAN),강동웅(Dong-Woong KANG),김종범(Jong-Bum KIM),윤영환(Young-Hwan YOON),이범석(Beom-S 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
The study of this research is to design and manufacture the roll cage frame for Kangwon National University KSAE Student Team in The KSAE Formula 2016 Competition. The objective value of the stress and the displacement at roll cage frame are 305 MPa and 25mm respectively. Structural analysis and structural optimization are performed by ANSYS Workbench 15 and Minitab 17. Structural optimized roll cage has bending stiffness of 23,833N/mm and torsional stiffness of 1,408N·m/deg. The results are compared with the roll cage manufactured by the other university teams. The roll cage for 2016 KNU KSAE student formula team has maximum stress of 146.68MPa and maximum displacement of 7.93mm which accomplish the requirements of the roll cage.
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