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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.
심재훈(Jaehun Shim),이중희(Jounghee Lee),신웅희(Unghee Shin),전갑배(Gabbae Jeon),임동원(Dongwon Im),이남철(Namcheol Lee),현은재(Eunjae Hyun),이재만(Jaeman Lee),김홍기(Hongki Kim) 한국자동차공학회 2019 한국 자동차공학회논문집 Vol.27 No.4
For many car manufacturers, lightweight and high performance qualities are strongly required. In particular, a variety of regulations(e.g., North America CAFE regulation) have forced global car manufacturers to develop new technologies for such requirements. In this paper, we will present a new carbon-ceramic composite brake to improve brake reliability for competing in the global market. First of all, a benchmark study is conducted for the composite brake system of the global competitors. The new composite brake system was developed by using a variety of development methodologies. Finally, we analyzed the future trend in brake technology and the potential effects when these technologies are applied.
심재훈(Jaehun Shim),신웅희(Unghee Shin),차관형(Gwanhyeong Cha),전갑배(Gabbea Jeon),최재일(Jaeil Choi),한창수(Changsoo Han),김봉수(Bongsoo Kim),이중희(Jounghee Lee),정유돈(Yoodon Jung) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5
Cable puller type EPB(Electric Parking Brake) system was used for the large passenger cars and SUV for a long time. However, it also had the disadvantages such as problem of poor underbody package and difficulty of design. In order to overcome these disadvantages, a novel EPB system to replace cable puller type EPB system was proposed. First, we had changed position of EPB actuator from rear sub-frame to rear wheel because of improvement of underbody package. Second, we had integrated the actuator to rear DIH(Drum In Hat) parking brake while penetrating carrier to set the specific components of EPB system. And then, the superiorities of the developed EPB system to compare with cable puller type EPB system were verified via up and down hill hold test, working noise test and working time test etc. In addition, it could obtain the weight reduction effect of EPB system. Finally, we proposed the supply strategy for the developed EPB system to realize vehicles.
후륜 구동 차량을 위한 전자식 주차 브레이크의 실차 효용성 및 적용 전략에 관한 연구
심재훈(Jaehun Shim),전갑배(Gabbae Jeon),이중희(Jounghee Lee),신웅희(Unghee Shin),김병철(Byongcheol Kim),정유돈(Yoodon Jung) 한국자동차공학회 2019 한국 자동차공학회논문집 Vol.27 No.5
Cable puller type electronic parking brake(EPB) system and caliper integrated type EPB system have been used for passenger cars and SUVs for a long period of time. However, there are many disadvantages, such as poor underbody package and difficulty in rear wheel design. In order to overcome these disadvantages, a novel EPB system to replace the existing type EPB system is proposed in this paper. First, the position of the EPB actuator is changed so as to improve the underbody package and design freedom of the rear wheel chassis module. In this system, the actuator is integrated into the rear drum-in-hat(DIH) parking brake. Second, the superiority of the developed EPB system, as compared to the existing type EPB system, is verified through a variety of tests, such as the hill hold test, working noise test, working time test, etc. It can also reduce the total weight of the EPB system. Finally, we proposed how to apply the developed EPB system to the actual car.
주차 안전성 및 패키지 향상을 위한 엑추에이터 통합형 전동식 파킹 브레이크 시스템 개발에 관한 연구
심재훈(Jaehun Shim),차관형(Gwanhyeong Cha),전갑배(Gabbea Jeon),이중희(Jounghee Lee),최재일(Jaeil Choi),한창수(Changsoo Han),김봉수(Bongsoo Kim),정유돈(Yoodon Jung) 한국자동차공학회 2016 한국자동차공학회 학술대회 및 전시회 Vol.2016 No.11
A novel EPB(electric parking brake) system to replace cable puller type EPB system was proposed. For this system, high performance EPB system integrated actuator was newly developed. The superiorities of the developed EPB system comparing with cable puller type EPB were verified via up and down hill hold test, working noise test and working time test etc. In addition, under body package will be better through these results because parking cable can be removed. Also, it could obtain the reduction effect of vehicle weight. Finally, a developed EPB system is expected to be used for large FR sedan.
고급차의 제동 신뢰성 향상을 위한 카본 세라믹 복합재의 제동 특성 제어 및 향후 기술 진화 트랜드 예측에 관한 연구
심재훈(Jaehun Shim),전갑배(Gabbae Jeon),이중희(Jounghee Lee),박병준(ByeongJoon Park),임동원(Dongwon Im),현은재(Eunjae Hyun),정광기(Kwangki Jung),김기정(Kijeong Kim),김홍기(Hongki Kim) 한국자동차공학회 2016 한국 자동차공학회논문집 Vol.24 No.6
The luxury car industry has grown 10.5 % every year from 2010 to 2014. For this reason, it is very important for automotive companies to improve profitability and brand value. High-performance brake systems have become an absolute necessity because of the increase in engine power and customer preference among other factors. Also, competing automotive companies actively reinforce domestic production in order to maintain quality and infrastructure for luxury cars. In this regard, we demonstrated new carbon ceramic brakes to improve brake reliability for luxury cars and to improve the competitiveness of automotive companies. Finally, we propose the next-generation braking technologyby predicting technological evolution trends.
차량 표준화를 위한 복합재 제동시스템의 냉각성능 향상에 관한 연구
심재훈(Jaehun Shim),이중희(Jounghee Lee),신웅희(Unghee Shin),황세라(Sera Hwang),임원석(Wonseok Yim),김병철(Byongcheol Kim),임동원(Dongwon Im),이남철(Namcheol Lee),현은재(Eunjae Hyun),김홍기(Hongki Kim) 한국자동차공학회 2021 한국 자동차공학회논문집 Vol.29 No.6
A composite material has an excellent mechanical property and a lightweight effect. Therefore, it was recently applied to various automobile systems such as body and chassis structures. However, it has a disadvantage in its thermal property due to its low density and thermal capacity. Furthermore, the composite material is very difficult to apply to the brake system because the brake size should be larger in a restricted space in the vehicle to fulfill the thermal performance. In this paper, we proposed a new composite brake to overcome these problems. To obtain ideal final results, we used a sequential design process that included root cause analysis, contradiction analysis, and substance-field analysis. Finally, we found two important design factors for a composite brake. First, we tried to increase the heat conductivity by controlling the amount of SiC for effective heat emission. To do so, we developed a new method of manufacturing the composite material. Second, we optimized the structure of the vent shape to improve the air flow. We designed the two-step spiral vent to overcome the disadvantage of the one-step straight vent. We improved the heat conductivity by up to 34 % and produced a unique vent structure compared to the previous model. As a result, the cooling performance of the composite brake improved by up to 7 %. The developed manufacturing method is expected to contribute to improved development efficiency that leads to cost reduction. Furthermore, improved brake performance solves problems related to vehicle standardization and NVH.
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.
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.
물질-장 모델 분석을 이용한 카본 세라믹 복합재의 체결 구조 개발 및 마찰/마모 특성 제어에 관한 연구
심재훈(Jaehun Shim),전갑배(Gabbae Jeon),심상현(Sanghyun Shim),김윤철(Yooncheol Kim),임동원(DongWon Im),현은재(Eunjae Hyun),정광기(KwangKi Jung),김기정(Kijeong Kim),김홍기(Hongki Kim) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
Needs of high performance brake system have strongly required for a long time because of increase of engine power and customer’s favorites etc. To solve these problems, a novel brake system was proposed using carbon ceramic composite. Also, a novel coupling structure between carbon ceramic composite and HAT was proposed using the substance-field model analysis and pugh matrix. The superiorities of developed brake system were verified via SiC, Si, C control, endurance, friction and fade analysis.