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유민우(Minwoo Ryu),임원식(Wonsik Lim),박윤경(Yunkyung Park),남궁철(Choul Namkoong),김수현(Soohyun Kim) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Due to the increase of concern on envelopment problem, the needs of a eco car is rising. Also, on account of the increase of oil price, the needs of the reduction of the fuel cost is increased. Therefore, necessity of hybrid vehicle that runs with engine and the electric motor is on the rise. Hybrid vehicles have been developed into various ways including serial type, parallel type, power split type. In this research, it subjected a axis vibration phenomenon through the engine fluctuation and hardness of clutch for vibration characteristic analysis.
멀티모드 하이브리드 차량용 건식클러치의 자동화 메카니즘 분석
유민우(Minwoo Ryu),임원식(Wonsik Lim),남궁철(Koongchoul Nam),김수현(Soohyun Kim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Due to the increase of oil price, the needs of the reduction of the fuel cost is rising. Therefore, necessity of hybrid vehicle that runs with engine and the electric motor is on the rise. Hybrid vehicles have been developed into various ways including serial type, parallel type, power split type. In this research, multi mode hybrid power train system, which can implement more than two modes, is used as subject. Especially, automation mechanism of dry type clutch, that exist between engine and power split gear train, is analyzed in detail.
전동식 조향장치의 진동특성 분석을 위한 볼-스크류 시스템의 동역학적 해석 모델 개발
이현섭(Hyunsub Lee),정춘화(Chunhua Zheng),유민우(Minwoo Ryu),임원식(Wonsik Lim),차석원(Sukwon Cha) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Electronic power steering(EPS) uses auxillary power of electric motor when steering wheel is rotated and has several advantages compared to hydraulic power steering. It is lighter than hydraulic power steering and has the effect of fuel saving. It also can make vehicle engine not to generate much heat. However, electronic power steering has a problem with noise, oscillation in ball-screw system. Ball-screw system generates much noise when collision occurs between a ball and a ball saver. In this paper, it figures out the trace of a ball of spiral movment and initial velocity before entering into ball saver. Then, it analyzes how to generate much noise, oscillation and how much to be generated.