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자동변속기용 습식 발진클러치의 마찰판 형상에 따른 냉각 순환 유량에 관한 연구
이진수(Jinsoo Lee),홍순석(Soonseok Hong),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Almost automatic transmission based on plantetary gear set use the torque converter as a starting device due to high power density and comfortable, vibration-decoupling torque transmission. But, the most disadvantage of the hydrodynamic starting device is low fuel efficiency. The torque converter in its modern design with lockup clutch and despite more and more improvements requires radial and axial installation space between the engine and the transmission. But, it is impossible to use big size converter because of limit area for starting device. The newly introduced the starting device with multi-plates is able to use to the stepped automatic transmission. This wet start clutch can achieve compact size due to no hydraulic elements, only have multi-plate clutch and damper system. The most innovative design for this starting device is the self-induced cooling concept. The single side plates with radial slots and reliefs in the steel support on the external and internal providing oil flow paths to cooling around the friction material which was heated by high slip speed. To endure extremely slip condition, it needs to optimize the shape of the oil flow path on the friction plates to increase cooling flow rate. This paper describes the optimization of oil path on friction plate by using CFD software to increase oil flow rate through the friction lining.
이진수(Jinsoo Lee),홍순석(Soonseok Hong),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Almost automatic transmission based on planetary gear set use the torque converter as a starting device due to high power density and comfortable, vibration-decoupling torque transmission. But, the most disadvantage of the hydrodynamic starting device is low fuel efficiency. The torque converter in its modern design with lockup clutch and despite more and more improvements requires radial and axial installation space between the engine and the transmission. But, it is impossible to use big size converter because of limit area for starting device. The newly introduced the starting device with multi-plates is able to use to the stepped automatic transmission. This wet start clutch can achieve compact size due to no hydraulic elements, only have multi-plate clutch and damper system. The most innovative design for this starting device is the self-induced cooling concept. The single side plates with radial slots and reliefs in the steel support on the external and internal providing oil flow paths to cooling around the friction material which was heated by high slip speed. This paper describes the design and development of a wet start clutch for RWD automatic transmission.
서준혁(Junhyeok Seo),홍순석(Soonseok hong),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2011 한국자동차공학회 지부 학술대회 논문집 Vol.2011 No.10-1
More than five auxiliary engines such as crankshaft, water pump, fan, air conditioning, power steering pump are equipped with an automobile and as a medium to drive them pulley is used Although the shape of pulley is simple, structure analysis is important when we design a pulley Because if pulleys are equipped in an engine only once, durability should be ensured until a junked car and according to thickness and shape stress of pulleys are affected. So in this study, we suggested optimizating design process and methodology of pulley using structure and fatigue analysis considering decreasing rate of cross section occurring in press process, shape and material thickness of pulley.
하이브리드 변속기용 모터 및 제너레이터 샤프트의 강도해석에 관한 연구
강동명(Dongmyung Kang),홍순석(Soonseok Hong),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
Transmission of power split type hybrid is consisted of motor and generator. Power is transmitted by shan of motor and generator. The alignment of two shafts and structural characteristics causes effect the stability of whole powertrain system. We did benchmarking motor and generator shan applied to power split type hybrid and checked the stress, fatigue, natural frequency through finite element method.
박태준(Taejun Park),홍순석(Soonseok Hong),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2007 한국자동차공학회 Symposium Vol.- No.-
New torque converter clutch works at low speed area for high fuel efficiency. This trend caused heat problem of friction material in lock-up clutch. Heat may cause the damage of friction material. Friction material require cooling flow rate for guarantee of material life. In order to improve cooling, Torque converter adapted the system by introducing the cooling hole in lock-up piston. However cooling hole causes torque drop because the oil flow for cooling lowers the pressure in the clutch piston. Torque converter designers should consider proper flow rate and torque for engine. Therefore the torque and hole size estimation is required for the early stage of torque converter design. Estimation equation was derived based on the physical background such as the centrifugal force, sudden expansion, sudden contraction and Bernoulli’s equation.
동적 거동을 이용한 토크컨버터 댐퍼 충격량 및 강도에 대한 연구
성상현(Sanghyun Sung),홍순석(Soonseok Hong),장재덕(Jaeduk Jang),주인식(Insik Joo),배대성(DaeSeong Bae) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Torque converter in automatic transmission transfers the engine power to transmission by ATF. A Torque converter consists of the hydrodynamic clutch device and the lock-up clutch device. The retaining plate and driven plate are part of the lock-up clutch. Lock-up clutch transfers the engine torque directly to automatic transmission. So it must have resistance and durability. And between retaining plate and driven plate happen impact. To analysis the dynamic Motion of damper system has been carried out using Torque Converter Toolkit made by OPEN API module in DAFUL. This paper is provided torque converter engineer with useful information for stopper impact and stress of damper system.
자동변속기용 습식 발진클러치의 슬립 조건에 따른 드래그 토크 변화에 관한 연구
이진수(Jinsoo Lee),홍순석(Soonseok Hong),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Almost automatic transmission based on planetary gear set use the torque converter as a starting device due to high power density and comfortable, vibration-decoupling torque transmission. But, the most disadvantage of the hydrodynamic starting device is low fuel efficiency. The torque converter in its modern design with lockup clutch and despite more and more improvements requires radial and axial installation space between the engine and the transmission. But, it is impossible to use big size converter because of limit area for starting device. The newly introduced the starting device with multi-plates is able to use to the stepped automatic transmission. This wet start clutch can achieve compact size due to no hydraulic elements, only have multi-plate clutch and damper system. The most innovative design for this starting device is the self-induced cooling concept. The single side plates with radial slots and reliefs in the steel support on the external and internal providing oil flow paths to cooling around the friction material which was heated by high slip speed. The drag torque is frictional resistance between drive plate and driven plate during the clutch does not engaged. Especially, this drag torque affects fuel efficiency at idle condition of engine. This paper describes the drag torque of pressure condition and slip time.
오미애(Miae Oh),홍순석(Soonseok Hong),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Detent Spring is attached on the transmissions, so it will give the same sense of speed change when drivers manipulated the shift lever. This paper was established in spring detent design and product verification process
성상현(Sanghyun Sung),홍순석(Soonseok Hong),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Torque converter in automatic transmission transfers the engine power to transmission by ATF. A Torque converter consists of the hydrodynamic clutch device and the lock-up clutch device. The retaining plate and driven plate are part of the lock-up clutch. Lock-up clutch transfers the engine torque directly to autotransmission. So it must have resistance and durability. In this study, we found the effect from Shape of mechanical stopper on retaining plate. The shpe of mechanical stopper has effect on the stress distribution of lock-up clutch.
유한요소 해석을 이용한 토션 댐퍼의 온도 분포와 열응력에 대한 연구
서중교(Junggyo Seo),홍순석(Soonseok Hong),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
The current automotive market, competition for the development of a hybrid car is accelerating. Due to stricter environmental regulations and development of alternative energy vehicles is required. Hybrid vehicles significantly reduce fuel consumption and harmful gas emissions. In hybrid vehicle system, torsion damper makes the powertrain system stabilized by reducing the fluctuation torque of various engine system when the engine using. Torsion damper structure in the present study sensor wheel and ring gear is manufactured by welding. At this time, the temperature will rise temporarily when combined torsion damper welded. Due to the temperature rise, it is important to design the thermal deformation of the torsion damper internal parts and does not exceed the allowable temperature. In this work, the torsion damper thermal deformation and thermal stress analysis was used for ANSYS.