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- 저자 : 윤정훈(Junghoon Yun) (검색결과 2 건)
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차량용 공조시스템에서 중량저감을 위하여 1.2t 두께를 갖는 AHS 개발
윤정훈(Junghoon Yun),이동원(Dongwon Lee),이대웅(Daewoong Lee),강성호(Sungho Kang),왕윤호(Yoonho Wang) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5
The development trend of vehicles has increasingly been focusing on reducing fuel consumption and emissions. Recent automotive industry has big challenge to improve the fuel economy and to meet the GHG (Green House Gas) regulations. The GHG regulations required to reduce emission about 30% by next 10 years. To meet the regulations, one of the solution is weight down in the vehicle components not only chassis parts but also cabin parts. So, development of 1.2 thickness thin AHS (Air Handling System) case to meet those requirements was tried. First we experienced in proto tooling base on the CAE analysis. The 3D AHS CAD modeling was designed considering stiffness and stress analysis by CAE, which is using mold flow program. After then AHS mold for mass production was developed with optimized gate, rib thickness, draft angle, and shape of surface. Finally, 1.2 thickness AHS case was developed successfully and meet to engineering specification and design criteria. In addition, tooling technologies and CAE analysis for 1.2 thickness AHS case was set-up.
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자동차 공조 시스템에서 중량 저감을 위하여 1.2t 두께를 갖는 AHU의 개발
이대웅(Daewoong Lee),윤정훈(Junghoon Yun) 한국자동차공학회 2019 한국 자동차공학회논문집 Vol.27 No.9
Recent trends in vehicle development have gradually been focused on fuel consumption and tailpipe emission. The greenhouse gas(GHG) regulations require a reduction in emission of roughly 30 % for the next 10 years. As a result, the automotive industry has a major challenge to enhance the fuel economy each year. In order to improve fuel economy, one of the solutions is to reduce the weight of the vehicle not only in the chassis parts, but also in the cabin components. Therefore, an attempt has been made to meet those requirements by developing an air handling unit(AHU) housing with a thickness of 1.2. For successful tooling, CAE analysis to implement an AHU housing with a thickness of 1.2 has been performed, taking into account both dynamic stiffness and injection mold flow analysis. Meanwhile, AHU housing mold for mass production was developed as optimized, taking into account the gate number, filling time, injection pressure and temperature, clamping force, volumetric shrinkage and deformation, and the mass product of AHU. Subsequently, the product made from mold met the engineering specification and design criteria through a radiated sound experiment. In this study, an AHU with a thickness of 1.2 was successfully developed by optimizing the mold structure and injection molding conditions, and attained the same dynamic stiffness and radiation sound as the current AHU housing with a thickness of 1.7 while reducing the weight by approximately 20 %.
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