변속기 이중 주축에서 오일 홀 위치 및 형상에 따른 유량 분배 설계기 (Design of Oil Hole Shapes and Locations in the Dual Main Shaft of Transmission for the Optimized Flow Distribution)

서지정보

· 발행기관 : 한국자동차공학회
· 수록지 정보 : 한국자동차공학회 논문집 / 29권 / 3호 / 219 ~ 227페이지
· 저자명 : 고정현, 장시열

초록

The dual main shaft of the transmission is an important component that must always be operated in the center of the automatic transmission under heavy, multi-functional conditions. Cooling and lubricating the contact parts inside the transmission are among the main roles of the dual main shaft to distribute the automatic transmission fluid(ATF) evenly to each part of the transmission system, and the distribution of ATF must match the required lowest flow rate. Failure to supply adequate flow rates to each contacting module will lead to reduced durability of the transmission due to insufficient lubricant supply. Moreover, over-estimated supply wastes more oil pump power, thus resulting in reduced fuel efficiency. Therefore, it is necessary that flow rates from each oil hole in the dual shaft system of the transmission are computed in advance. In this study, optimized flow rates are provided, depending on the shapes of the oil hole inside the dual shaft system with the help of CFD software(FLUENT). The shape design methods that can optimize distribution through oil holes are shown, and computational results are compared according to the design methods in the dual shaft structure of the transmission.

영어초록

The dual main shaft of the transmission is an important component that must always be operated in the center of the automatic transmission under heavy, multi-functional conditions. Cooling and lubricating the contact parts inside the transmission are among the main roles of the dual main shaft to distribute the automatic transmission fluid(ATF) evenly to each part of the transmission system, and the distribution of ATF must match the required lowest flow rate. Failure to supply adequate flow rates to each contacting module will lead to reduced durability of the transmission due to insufficient lubricant supply. Moreover, over-estimated supply wastes more oil pump power, thus resulting in reduced fuel efficiency. Therefore, it is necessary that flow rates from each oil hole in the dual shaft system of the transmission are computed in advance. In this study, optimized flow rates are provided, depending on the shapes of the oil hole inside the dual shaft system with the help of CFD software(FLUENT). The shape design methods that can optimize distribution through oil holes are shown, and computational results are compared according to the design methods in the dual shaft structure of the transmission.

참고자료

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