Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Ballooning Phenomenon of Torque Converter Torus Size for Automatic Transmissions

자동변속기용 토크컨버터 토러스 사이즈에 따른 팽창 현상

  • Jang, Jaeduk (Department of Mechanical Engineering, Myongji University) ;
  • Lee, Woongcheol (Technology and Innovation Management, Hanyang University) ;
  • Sung, Dukhwan (Department of Automobile, Suwon Science College)
  • 장재덕 (명지대학교 기계공학과) ;
  • 이웅철 (한양대학교 기술경영전문대학원) ;
  • 성덕환 (수원과학대학교 자동차과)
  • Received : 2016.03.28
  • Accepted : 2016.09.28
  • Published : 2016.11.01
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Abstract

The torque converter is deformed according to the rotating speed and control pressure when engine power is transferred to the transmission. This deformation, which is called ballooning phenomenon, occurs mainly at the outer side by the centrifugal force of the automatic transmission fluid (ATF) and the control pressure from the valve body. Although the torque converter is slightly deformed when rotating, the ballooning phenomenon affects fluid performance, efficiency and durability. Thus, expansion characteristics analysis is important in determining torus size, control pressure and structure. In this paper, an analysis equation and FEM model was developed to investigate the expansion characteristics. Using this model, structural analysis was performed to investigate the relationships between deformation and the torus diameter. The results were confirmed by comparing with the test results.

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References

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