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쿠션 폼 패드의 경도 및 히스테리시스 곡선을 통한 자동차 시트 컴포트 개선 방안 연구
정세빈(Sebin Jung),정승태(Sungtae Jeong) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
As time spent in our vehicles increases, requests for automotive seat comfort have also increased. In particular, extended seat use typically causes the seats foam pad to sag or distort. Therefore, this study develop a new seat foam pad by applying different evaluation specifications, such as two different harness specifications and hysteresis loss rate. Based on the new specifications, a new seat foam was verified with three tests ? harness, force-deflection, and compression ? that compared it a sagging, uncomfortable foam pad. Finally, the newly developed foam pad with applied enhanced specifications proved that it offers better performance than the pad originally issued in the vehicle.
시트 쿠션 부 재료 및 구조 변경에 따른 슬림화 가능 범위 연구
김진우(Jinwoo Kim),김선웅(Sunwoong Kim),이명렬(Myoungryoul Lee) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
This study was conducted as part of the technical research and development project, ‘Seat cushion slimming’, of the internal system plastic materials development team of Namyang Research Institute for Hyundai Motor Company. A study on the feasibility of obtaining similar comfort performance compared to the original system was conducted by developing foam pad slimming of a seat with special elastic fabric. As a validation step, verification was carried out on the key parts, not finished seat. The principle test will be carried out by dividing the original and development systems. The test parameters and objective functions were selected for each system and principle test set were organized according to the design of experiment method. Factors related with suspension, elastic fabric, form pad were employed as main test parameters. The static load characteristic, point load characteristic, and bottom feel as the seat quantitative test items were employed as objective functions. This paper contains only the results of the principle test on the original systems, and the principle tests on the development system are currently underway. The main effect on the objective functions of the test parameters and validation verification will be analyzed through principle test results for each system.
이현희(Hyun-Hee Lee),김태경(Tae-Kyung Kim),이광주(Kwangju Lee) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.12
소비자들의 요구 증가로 고급차종에만 적용하던 통풍 시트는 점차 중소형 차종으로 확대 적용되고 있는 추세이다. 팬에서 발생한 유량이 폼 패드, 필터 폼 및 시트 커버 등을 통과하는 과정에서 많은 손실이 발생하기 때문에, 착좌면에 도달하는 유량의 정확한 해석은 쉽지 않다. 또한 유로 형상이 복잡하여 이의 정확한 모델링 없이는 착좌면에 도달하는 정확한 유량의 해석이 힘들다. 본 연구에서는 팬에서 발생한 유동이 통기 매트와 폼 패드를 통과하였을 때의 유량을 해석하였으며, 해석결과와 실험결과를 비교하였다. 해석에서 유동분산판 내부의 돌기 형상을 보다 정확하게 모델링함으로써, 해석결과와 실험결과의 경향을 정확하게 일치시킬 수 있었다. 유량이 통기성 재료인 패드 폼을 통과하는 과정에서 발생한 손실을 실험으로 측정하여 해석결과를 보정함으로써 해석결과와 실험결과를 정확하게 일치시킬 수 있었다. 다음으로 필터 폼과 시트 커버를 통과하여 착좌면에 도달하는 유량을 실험으로 측정하였다. 착좌면에서의 유량이 많지 않아서, 유량 콘을 사용하여 유량을 측정하였다. 팬에서 발생한 유량의 약 35.7%만이 최종적으로 착좌면에 도달하는 것을 확인할 수 있었다. In ventilated seats for cars, air flow is generated by a fan and passed through a foam pad, foam filter, and seat cover. There is a significant loss of air flow in this process, and it is not easy to analyze the amount delivered to the driver. Another difficulty is the geometric complexity of the air flow passage inside the seats. In this paper, the air flow through a foam pad was analyzed. Proper modeling of the bumps in the ventilation mat was found to be important in the analysis. Air flow is lost when it passes through the porous pad foam, which was measured and used to correct the analysis results. The corrected analysis results were in a good agreement with the experimental results. The amount of air flow delivered to a driver was measured using an airflow cone. Only 35.7% of the air flow from the fan was delivered.
통풍시트의 유량 성능에 영향을 미치는 설계요소에 대한 실험적 연구
국승훈(SeungHun Kook),하현필(HyunPeal Ha),조주행(JooHaeng Cho) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
Today’s cars are emphasized not only as a means of transportation, but also as a daily space. Among them, improving comfort is closely linked to comfortable living conditions in cars, and car seats are also evolving to meet these trends. Ventilated automotive seats play a big role in providing comfort conditions for drivers and passengers, so vehicles with ventilated seats are on the rise. This increases the experience of customers’ ventilated seats and increases the performance they demand. In this research project, ventilated seats were divided into three system; blower system, pad system and covering system. Air flow performance was measured by changing major design factors. Based on this, design factors that effect on air flow performance the most are derived and presented in the design guide for strengthening air flow performance.
승용차용 시트 패드와 일체 발포 가능한 통풍 유로 키트의 유동 실험 및 해석에 관한 연구
최석민(Suk-Min Choi),이동진(Dong-Jin Lee),안종록(Jong-Rok An),김기선(Key-Sun Kim) 한국산학기술학회 2024 한국산학기술학회논문지 Vol.25 No.1
This study examined the ventilation flow kit for automotive seats, one of the key components of automotive interior comfort technology. The research focuses on improving the performance of the existing Plenum-type airflow system with a new ventilation flow research model. The new research model simplifies the shape of the airflow path compared to the existing product, reducing air turbulence during flow. Simultaneously, embossing is applied to the lower surface of the airflow path to generate a swirling motion of mixed air inside, achieving a uniform airflow velocity at each ventilation outlet. The existing product and the research model were designed, and fluid dynamics analysis was conducted to validate the performance improvement of the improved research model. Prototypes were also manufactured and subjected to performance evaluation tests. Fluid dynamics analysis showed that the average airflow velocity at the ventilation outlets was 2.88 m/s for the existing product, whereas the research model achieved an average velocity of 6.22 m/s, representing an approximate 116 % improvement in performance compared to the existing product. Furthermore, the uniformity of airflow velocity was enhanced by approximately 195 %. The performance testing results indicated that the existing product exhibited an average airflow velocity of 2.76 m/s, whereas the research model demonstrated an average velocity of 5.41 m/s, resulting in 96.01 % performance improvement.