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토크컨버터 슬립 제어 록업 클러치 차압 불안정 요소에 관한 연구
이웅철(Woong-Chul Lee),김진문(Jin-Moon Kim),장재덕(Jae-Duk Jang),주인식(In-Sik Joo) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Torque converter in automatic transmission transfers the engine power to transmission by ATF. Lock-up clutch of torque converter in automatic transmission has been recently designed with a significant purpose of achieving a more fuel economy. To reduce more fuel consumption, the slip is generated between a friction facing and a front cover for torque converter lock up clutch. This paper discussed unstable factors of differential pressure for torque converter lock-up clutch with slip control and seal ring type. Cycle time of torque converter products is delayed due to unstable of differential pressure for slip control lock-up clutch. Therefore, It is very important that the torque converter engineers search for unstable factors of differential pressure and try to find a solution.
해석 및 시험을 통한 토크 컨버터 러그 용접 강도에 관한 연구
이웅철(Woong-Chul Lee),홍순석(Soon-Seok Hong),장재덕(Jae-Duk Jang),주인식(In-Sik Joo) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Torque converter in automatic transmission transfers the engine power to transmission by ATF. It is connected on engine and have to withstand against high engine torque. Generally lug on torque converter is welded on front cover and is bolted to the drive plate of engine. Because of high engine torque, welding durability of lug is important. This paper discussed welding durability of lug through the static structural analysis and test. The static structural models of the lug and welding bead are developed by interfacing the finite element model. The static structural analysis of the lug is investigated by modeling the front cover assembly using Pro-E and analyzing with ANSYS. This paper is provided torque converter engineer with useful information for durability design.
이웅철(Woong-Chul Lee),홍순석(Soon-Seok Hong),장재덕(Jae-Duk Jang),주인식(In-Sik Joo) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Torque converter in automatic transmission transfers the engine power to transmission by ATF. Hub pump drive of torque converter in automatic transmission drives oil-pump by physical connection and expands when it is highly heated and rotated. Because of interference between oil pump bush and torque converter it is important that hub pump drive’s thermal expansion rate. This paper discussed static thermal expansion rate of hub pump drive for torque converter with high temperature. The static structural model of the hub pump drive is developed by interfacing the finite element model. The static thermal expansion analysis of the hub pump drive is investigated by the impeller assembly of torque converter and modeling using ANSYS. This paper is provided torque converter engineer with useful information for optimum hub pump drive design.
리엑터의 Slot 각 변화에 따른 토크 컨버터의 성능 특성
박태준(Tae-Jun Park),이웅철(Woong-Chul Lee),장재덕(Jae-Duk Jang),주인식(In-Sik Joo) 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
This paper discussed the application of a slotted reactor blade to enhance performance characteristic of a torque converter. In order to estimate performance characteristics of torque converter by slot angle of reactor, several slotted reactor blades were newly generated with different slot angles. Using three-dimensional CFD program, CFD-ACE®, torque converters with these reactors were analyzed. The analysis results show that a torque converter with slotted reactor gets more flat capacity factor and optimal slot angle of reactor exists.
슬롯을 갖는 토크 컨버터 리엑터의 성능 특성에 관한 연구
박태준(Tae-Jun Park),이웅철(Woong-Chul Lee),장재덕(Jae-Duk Jang),주인식(In-Sik Joo) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper discussed the application of a slotted reactor blade to enhance performance characteristic of a torque converter. In order to estimate performance characteristics of torque converter by slot angle of reactor, several slotted reactor blades were newly generated with different slot angles. Using three-dimensional CFD program, CFD-ACE®, torque converters with these reactors were analyzed. The analysis results show that a torque converter with slotted reactor gets more flat capacity factor and optimal slot angle of reactor exists. Also, CF and Tr decrement at stall in a torque converter with holed reactor are less than those in a torque converter with slotted reactor.
급성 감염후 사구체 신염이 동반된 성인 Henoch-Schonlein 자반증 1례
문경민 ( Kyoung Min Moon ),강주형 ( Joo Hyung Kang ),김동규 ( Dong Gyu Kim ),이웅철 ( Woong Chul Lee ),문유리 ( Yu Ri Moon ),주종은 ( Jong Eun Joo ),김용일 ( Yong Il Kim ),양승오 ( Seoung Oh Yang ),이영숙 ( Young Sook Lee ) 대한신장학회 2008 Kidney Research and Clinical Practice Vol.27 No.4
Henoch-Schonlein purpura (HSP) is a small-vessel vasculitis that are predominantly observed in children, affecting their skin, joints, gut and kidneys. The renal prognosis of HS nephritis is known to be worse in adults than in children. It is defined by tissue deposition of IgA. In most HSP patients, serum complement levels are usually normal. However, some authors reported abnormalities of serum complement levels in children-onset HSP. The authors report here a rare adult-onset case of HSP combined with post-infectious glomerulonephritis, especially hypocomplementemia and subepithelial `hump`-like electron dense deposits.