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Manual Transmission Clutch Pre damper 최적화 및 실험적 검증
김영권(Youngkwon kim),길민철(Minchul kil) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5
Recently strong Requirement of high fuel efficiency and low emission regulation bring about the engine downsized and turbocharger implemented in small and compact vehicles. It inevitably makes the isolation of torsional vibration phenomenon in driveline worse and difficult due to the high amplitude of engine excitation. Therefore Manual transmission applications incrementally adopt new strategy of the wide angle pre-damper and CPA or change the strategy from SMF to DMF in even small-size for the efficient damping on torsional vibration at idle or drive mode. When it comes to apply the SMF application, various clutch damper characteristic library test is necessary as the main factor to reduce the torsional vibration, in particular, in case of idle tuning, 2<SUP>nd</SUP> stage pre damper characteristics between cold and hot condition make the tuning more complicated and hard to optimize and lead to more various samples tests. As a result, in order to optimize best characteristic values of pre-damper and reduce variants in idle tuning activity, it is necessarily required to set up theoretical explanation on pre damper filtration and develop efficient test method throughout the verified correlation between Amesim modeling and realistic tests torsional behavior.
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Imported CVT 적용 P/T NVH 개발 사례 연구
백승목(Seungmok Baek),길민철(Minchul Kil),이석환(Seokhwan Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
All the automotive makers make efforts to meet the customer’s desire which is being varying very fast. But the limitation for development period and cost makes it very difficult that automotive makers cannot have enough time and chance to get perfect launch. Recently customer’s concerns about fuel-efficiency is growing, so a imported CVT is considered and applied to a new developed vehicle. CVT noise was issued during the process integrating the imported CVT with a new vehicle. To meet customer’s high demand for quiet vehicle, we uses many techniques to reduce CVT noise.. In this study, Imported CVT will be introduced about its major characteristics. Also experimental and CAE analysis method is introduced and can be proved to improve CVT noise
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