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박창선(Changsun Park),차용훈(Yonghoon Cha),성백섭(Backsub Sung),이석신(Seokshin Lee),배광석(Kwangsuk Bae),최귀현(Kuy syun Choi),김정주(JungjJoo Kim),김남표(Nampyo Kim),박성호(Sungho Park) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Die casting which is extensively known as a necessary technology for lightweight spare parts of automobiles has three central elements of casting equipment, casting technology and die and has had much attention as a technology with the highest coefficient of expansion with increased need of high-quality and high-precision. Therefore, a regulator of LPI automobile receives high internal pressure and works as a central part of the basic fuel supply system according to quality of performance. To produce high-quality casting goods, we need to identify causes of defects and theoretical analyses on physical phenomena occurring in manufacturing. As a result of comparing Types of casting design, it was found that the number of overflow affected flow, flow speed and solidification temperature.
탑승객 열 쾌적성 향상을 위한 외기 도입량 제어 공기 분배 장치 개발
박창선(Changsun Park),김주훈(Joohun Kim),이동원(Dongwon Lee),이대웅(Daewoong Lee),강양보(Yangbo Kang) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
In this paper, the effects of outdoor air (ram air) flowing into interior through an air handing unit (AHU) was studied. The passengers felt thermal discomfort when vehicle was driving at high speed at winter due to cold ram air into cabin. The amount of ram air that varies depending on the driving speed of the vehicles is controlled to improve the thermal discomfort and cabin ventilation of the occupants, and to prevent fogging of the windshield. The air pressure to the AHU against each driving speed of the vehicle was measured, and the opening angle of the intake door at the AHU and the feedback voltage of the servo motor were measured. Ram air control is changed the intake door mechanism installed in the AHU’s blower to select the fresh air, and developed a control logic to control the amount of ram air into the occupants. As the results, current AHU increase the inflow of ram air by more than 60% when the vehicle runs at high speed, while the developed AHU controls the amount of ram air to about 10% regardless of the vehicle speed.