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토크 컨버터 사양에 따른 차량 연비 및 동력성능에 대한 연구
홍명철(Myungchul Hong),이웅철(Woongchul Lee),이륙(Lee Ryuk),이흥규(Heungkyu Lee) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
Torque converter of automatic transmission transmits the power from engine to vehicle with its fluid parts and lock up clutch. In order to enhance vehicle performance, torque converter has to be multiplied, but in this case power loss by fluid parts necessarily occurs. On the other hand, to improve the fuel efficiency, the vehicle must be operated in a direct state using the lock up clutch of the torque converter. Therefore it is necessary to study the types of torque converter such as torsion spring stiffness, lock up rpm, inertia of engine side and transmission side to improve fuel efficiency and vehicle performance. This study will propose optimized torque converter for fuel efficiency and vehicle performance of passenger car and SUV vehicles with analysis and test of torsional vibration model of driveline.
홍명철(Myungchul Hong),이흥규(Heungkyu Lee),이륙(Ryuk Lee),황현수(Hyunsoo Hwang),김태준,김홍민(Hongmin Kim) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
Although oil pump is essential part to produces oil flow to the transmission components, over-design of the oil pump causes power loss in automatic transmission. By using optimized oil pump displacement with 2 pump system which has mechanical oil pump and electric oil pump can reduce power loss of automatic transmission. This paper introduces development process of 2 pump system and proposes how to increase the transmission efficiency with 2pump system in automatic transmission.