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봉선우(Seonwoo Bong),배석정(Sukjung Bae),허형석(Hyungseok Heo),심정민(Jeongmin Shim) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5
It is necessary to reduce power consumption of pump parts that use engine power as driving source in order to increase fuel efficiency. On this account, development of oil pumps which has excellent mechanical efficiency, minimizes internal flow rate loss and can be driven with relatively low torque, are being actively pursued. In this study, structural analysis for the rotor and vane was carried out at 40 bar, which is operating pressure of the CVT. Also, the effect of the vane thickness and total length of the vane on structural performance was analyzed according to each model.
봉선우(Seonwoo Bong),이헌균(Heonkyun Lee),허형석(Hyungseok Heo),강대준(Deajun Kang),진상곤(Sanggon Jin) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5
The efficiency of water pump for automobile is being greatly increased due to many research activity. Especially, research on the inlet/outlet angle, height of the impeller, the volute shape, and the discharge port diameter, are actively pursued. In the study, the performance for changed inlet/outlet angle of impeller was analyzed. Also, the performance for changed height of impeller was analyzed. The performance analysis was performed according to the shape of the volute. The discharge port was analyzed by changing the discharge port diameter. As a result, a model with changed impeller outlet height, changed impeller inlet angle, changed volute shape, and changed discharge port diameter was constructed and analyzed.
습식 DCT용 유압제어 핵심부품의 형상이 누설 유량에 미치는 영향
봉선우(SeonWoo Bong),이헌균(HeonKyun Lee),윤권덕(GweonDuk Yoon),이동헌(DongHeon Lee),이재경(JaeKyung Lee) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
Recently, Dual Clutch Transmission(DCT) with high efficient of the manual transmission and convenience of the automatic transmission has been researched and developed. DCT is divided into dry and wet depending on whether the oil is used or not. Wet DCT have to use hydraulic pressure to deliver the clutch’s large torque without loss. Therefore, It is necessary to develop a solenoid-type control valve capavle of high pressure control at level of 60bar. In this study, the effect of spool and flange geometry affecting leakage has been investigated using computational fluid analysis. Also, prototypes were fabricated to evaluate leakage according to clearance.
GDI 인젝터 노즐 설계 변수에 따른 비정상 유동 특성
봉선우(SeonWoo Bong),이헌균(HeonKyun Lee),윤권덕(GweonDuk Yoon) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
Recently, studies on the dynamic behavior of injector nozzles are actively underway, and studies on the flow characteristics in the nozzles have been actively conducted through the CFD due to the improved computer function. In this study, flow characteristics according to injector nozzle design parameters were analyzed by using commercial analysis program. In order to investigate cavitation and the behavior of air and liquid in the nozzle due to the sudden pressure change inside nozzle, multiphase flow analysis using VOF was used. In addition, UDF function was used to control the force acting on the ball that changes with time and the moving distance of the ball. Remeshing was performed periodically using the dynamic mesh function.
수학적 모델링을 활용한 Shock Absorber의 설계 변수에 따른 성능 분석
봉선우(SeonWoo Bong),이헌균(HeonKyun Lee),김영범(YeongBum Kim) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
Recently, suspension is being actively developed to improve performance and safety of the vehicle. The function of suspension is to damp the vibration transmitted from the road surface to vehicle body. In this study, 1-D code program using mathematical model was developed for investigating damping characteristic according to design parameters. As design variables, the disc thickness and the number of orifice holes were selected, and the effect of each parameters on the damping force was examined by 1-D code.