Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Shift Speed Improvement of a Metal Belt CVT

  • Lee, Heera (Graduate School, Department Dept. of Mechanical Design Engineering, Sungkyunkwan University) ;
  • Kim, Hyunsoo (Department of Mechanical Design Engineering, Sungkyunkwan University)
  • Published : 2001.12.01
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Abstract

This parer presents a CVT line pressure control strategy for the increased shift speed. Firstly, an algorithm to increase the CVT shift speed is suggested based on a modified CVT shift dynamics and shift speed maps are constructed. In addition, simplified dynamic models of the line pressure and the ratio control valve are derived by considering the CVT shift dynamics, and low level control algorithms for the ratio and the line pressure control are proposed. Using the shift speed maps and the simplified dynamic models of the CVT system, shift performance is investigated. It is found from the experimental and simulation results that improved shift speed can be achieved by increasing the lilly pressure.

Keywords

References

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