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전자클러치 마찰재 성능개선 주요인자에 대한 실험적 연구
이헌상(Hunsang Lee),윤길상(Kilsang Yoon),허헌(Heon Hur) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
This study presents key elements to increase friction lining performance by analyzing friction lining component and experimental result about the effect to increase frictional force of friction lining. Experiments were conducted by evaluating friction coefficient. All the result shows that 1) Key elements of friction lining component ingredient to increase friction coefficient. 2) Melamine resin increase heat-resisting property so the friction coefficient reduction was small at high temperature condition. Moreover, friction lining fade property was improved.
자동차 에어컨 시스템에서 이중관 열교환기가 성능에 미치는 영향에 관한 실험적 연구
강민웅(Minwoong Kang),윤길상(Kilsang Yoon),이대웅(Daewoong Lee) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
Mobile air –conditioning system efficiency become more important to improve fuel efficiency and reduce green housegas emissions, so internal heat exchanger(IHX) applications become necessary for R134a refrigerant air-conditioning system as well as anR1234yfrefrigerant air-conditioner. In this study, R134arefrigerant air-conditioning system was investigated with three different type of coaxial IHX. The experimental results showed three different types of IHX havethe similar cooling capacity, but spiral type IHX shows slightly better coefficient of performance(COP) than other type of coaxial type IHXs. Type 3 IHX increas COP about 0.5~1.5% and 0.9~1.0% than Type 1 IHX and Type 2 IHX respectively.