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HF를 장착한 차량 구동계의 비틀림 진동 해석에 관한 연구
허만대(Mandae Hur),이성구(Sungkoo Lee) 한국자동차공학회 2007 한국자동차공학회 Symposium Vol.- No.-
Torque fluctuation of engine generate gear rattle noise of transmission and many researches have been studied to decrease rattle noise by adjusting SMF with clutch damper system. Optimization of stiffness and inertia at clutch system can't decrease perfectly rattle noise problem because natural frequency of driveline with SMF exist in driving range. So, we need to develop new damper, HF that improve damping performance by increasing inertia and decreasing stiffness. In this paper, we established torsion model about powertrain system including HF and we predict torsion vibration behavior on the idle, drive and engine start mode through performing simulation. Also, we measure torsion vibration through vehicle vibration test and validate simulation model by comparing vehicle test data. We proposed improvement action of rattle noise as studying vibration parameters of HF.
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.