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Hydraulic Clutch System의 Mission Profile 및 내구시험모수 결정에 관한 연구
이상천(Sangcheon Lee),허만대(Mandae Hur),이춘곤(Chungon Lee),김재영(Jaeyoung Kim),강지우(Jiwoo Kang),이홍범(Hongbum Lee),소윤섭(Yoonsub So),이종형(Jonghyung Lee),민병길(Byunggil Min),이재열(Jaeyul Lee) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.5
One of reliability measurements of vehicle is estimated by driving mileage but the reliability of component, such as an hydraulic clutch system, is defined from the number of successful operational cycle. Relationship between these reliability measurement variables(mileage and cycle) should be examined first of all in the reliability estimation of components. Relationship between mileage and cycles is commonly known as linear function. However, the gradient depends on the operational environmental condition. Therefore, estimation of mission profile variable should be done with correlation analysis at the same time. In this paper, we derive mission profile variable of an hydraulic clutch system by field vehicle test and suggest the determination process of durability test parameters of CMC(Clutch Master Cylinder) with mission profile variable.
이명섭(Myungsub Lee),이재천(Jaecheon Lee),허만대(Mandea Hur),김재영(Jaeyoung Kim),이홍범(Hongbum Lee),소윤섭(YoonSub So) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This study presents the design and manufacture of Vacuum Clutch Booster(NCS). Since engine torque tends to be increased, manual vehicle clutch load is growing. The objective of this study is to reduce clutch pedal load by using clutch vacuum booster. First, the principle of performance about Vacuum Booster was addressed to keep studying and analytic of booster and to get the parameter of booster’s improvement. Second modeling using MATLAB and calcuate a result. Third manufacture of NCS and then dynamic tests was carried. Compare dynamic test with MATLAB Simulation. In the middle part of the simulation was not able to get a good result because of vacuum ratio and Reaction DISC part(parameter K). As a result, A decrease of 3.62kgf pedal load compared with unused booster was achieved. Furthermore, The additional dynamic’s Modeling of Vacuum Booster program by MATLAB make up to for the clutch control part.