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공진형(Jinhyung Kong),김정윤(Jungyun Kim),임원식(Wonsik Lim),박영일(Yeong Il Park),이장무(Jang Moo Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Semi spherical CVT(SS-CVT) is a traction type CVT, which transmits power by frictional force between a spherical shaped variator and an output disk. In this study, the design of variator was modified in order to cancel the thrust forces generated by bevel gears. In addition, the mathematical model for analyzing dynamics of the modified SS-CVT was developed. Since two dimensional friction behavior is occurred on a contact point between a variator and a disk, the assumption of perfect rolling is not correct Hence the dynamic and continuous friction model called LuGre model was considered, and the procedure of solving governing equations was presented.