An apparatus for ratio control of a continuously variable transmission includes a driver commanded ratio unit outputting a signal defining a commanded ratio. A clamp control portion is in communication with the driver commanded ratio unit. The clamp control portion includes: a ratio limits and override ring selecting a ratio matching the commanded ratio from an executable functions having stored ratio code data; a screening monitor continuously receiving output from the executable functions and using an input from a vehicle speed signal to compute minimum and maximum ratio limits for the ratio selected by the ratio limits and override ring; and a ratio control execution ring in communication with the screening monitor. The ratio control execution ring calculates a range of pressures allowed for operation of both primary and secondary pulleys of the continuously variable transmission.


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    Title :

    Method and apparatus for ratio control for a continuously variable transmission



    Publication date :

    2019-06-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F16H Getriebe , GEARING / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion



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    Ratio changing the continuously variable transmission

    Mahoney,J.E. / Maguire,J.M. / Bai,S. et al. | Automotive engineering | 2004


    Ratio changing the continuously variable transmission

    Mahoney,J.E. / Maguire,J.M. / Bai,S. et al. | Automotive engineering | 2004



    Ratio Changing the Continuously Variable Transmission

    Mahoney, J. E. / Society of Automotive Engineers | British Library Conference Proceedings | 2004