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복합재 제동시스템의 NVH 악화 특성 저감을 위한 이상해결책 개발에 관한 연구
심재훈(Jaehun Shim),이중희(Jounghee Lee),신웅희(Unghee Shin),황세라(Sera Hwang),임원석(Wonseok Yim),고영은(Youngeun Ko),김병철(Byongcheol Kim),임동원(Dongwon Im),현은재(Eunjae Hyun),이재만(Jaeman Lee) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
A variety of composites materials such as chassis system and body structure are applied to car industry. However, it is very difficult to apply composite materials to brake system because of NVH problem of composite material. In this paper, we present new solution to improve it. To achieve this goal, we used development method such as RCA (Root Cause Analysis), PCA (Problem Chain Analysis) and CA (Contradiction Analysis). We could find main causes of NVH problem through RCA and define new relationships among main causes through PCA and CA. And we can find IFR (Ideal Final Result) through interaction between PCA and CA. Finally, we could get effective results to reduce NVH characteristics.
카본 세라믹 복합재를 이용한 제동시스템 개발 및 성능향상에 관한 연구
심재훈(Jaehun Shim),이중희(Jounghee Lee),신웅희(Unghee Shin),전갑배(Gabbae Jeon),김병철(Byongcheol Kim),김봉수(Bongsoo Kim),김윤철(Yooncheol Kim),임동원(DongWon Im),현은재(Eunjae Hyun),정광기(KwangKi Jung),김기정(Kijeong Kim),김홍기(Hon 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
Luxury car industry recently increased to 10.5% per every year. For this reason, it is very important issue for motor company to improve profitability and value of brand. Therefore, needs of high performance brake system have strongly required because of increase of engine power and customer’s favorites etc. Also, competitive motor companies actively reinforce domestic production in order to maintain quality and infra for luxury car. In this situation, we will show you the new carbon ceramic brake to improve brake reliability for luxury car and to compete competitors. Finally, we will propose future braking technology through technology evolution trend prediction.
복합재 디스크의 온도 저감을 위한 열전도도 증대 및 유동구조 최적화에 관한 연구
심재훈(Jaehun Shim),이중희(Jounghee Lee),신웅희(Unghee Shin),황세라(Sera Hwang),임원석(Wonseok Yim),김병철(Byongcheol Kim),고영은(Youngeun Ko),임동원(Dongwon Im),현은재(Eunjae Hyun),이재만(Jaeman Lee) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
Composite material has excellent mechanical property and lightweight effect. Therefore, it has been recently applied to a variety of systems of automobile such as body and chassis structures. However, there is a disadvantage of thermal property due to low density and thermal capacity. Furthermore, it is very difficult to apply composite material to brake system. In this paper, we will propose a new composite brake to overcome these problems. First, we try to increase heat conductivity for effectiveness of heat emission. To do so, manufacturing method of composite material is newly developed. Second, we optimize structure of vent shape to improve the air flow. We improve heat conductivity up to 34% and get unique vent structure compared to the competitor. Finally, cooling performance of composite brake is improved up to 7%. These results will contribute to improve brake performance such as NVH problem.