A fuzzy logic ratio control algorithm for a metal belt CVT is suggested considering the on-off characteristics of the ratio control valve and the nonlinear characteristics of the CVT shift dynamics. In the fuzzy logic, variable computation time for the error of the ratio and the rate of the error is suggested depending on the velocity of the rate of the CVT ratio. Experimental results show that a desired speed ratio can be achieved at a steady state by the fuzzy logic in spite of the fluctuating primary pressure. In addition, it was found that a faster response and better robustness can be obtained when compared with those of the PID control. It is expected that the ratio control algorithm suggested in this study can be implemented in a prototype CVT.
Ratio Control of Metal Belt CVT
Sae Technical Papers
SAE 2000 World Congress ; 2000
2000-03-06
Conference paper
English
Ratio Control of Metal Belt CVT
British Library Conference Proceedings | 2000
|Ratio control of metal belt CVT
Automotive engineering | 2000
|Dynamic Response of Metal Belt CVT Vehicle and Electronic Control of Shift Ratio
British Library Conference Proceedings | 1997
|Shifting dynamics of metal pushing V-belt - rapid speed ratio variations
Automotive engineering | 2000
|Theoretical Model of Metal V-Belt Drives During Rapid Ratio Changing
Online Contents | 2001
|