Control Strategy of Ratio Changing System for a Metal V-Belt CVT Adopting Primary Pressure Regulation

압력제어 방식 금속 벨트 CVT 변속비 제어 전략

  • 최득환 (계명대학교 기계자동차공학부) ;
  • 김현수 (성균관대학교 기계공학부)
  • Published : 2002.05.01


In this paper, the control strategy of ratio changing system for a metal belt CVT adopting primary pressure regulation is developed, and the shirting performance of pressure regulating type CVT with the suggested control strategy is investigated. The control strategy suggested in this study is composed of 2 feedback loop, one is speed ratio feedback and the other is primary pressure feedback. The pressure feedback is adopted to ensure prohibiting a belt slip during transient period in a fast downshift mode. Simulation results show that the system with suggested control strategy gives appropriate response time and tracking Performance for upshift and also gives a proper primary pressure which can prohibit the belt slip. In addition, it is fecund that the given system has an acceptable servo property in tracking the target speed ratio and robustness for the disturbance of line pressure.


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