A vehicle includes an engine with an associated engine-speed sensor, and wheels each having a respective wheel-speed sensor. The vehicle also includes a continuously variable transmission (CVT) coupled to the engine and configured to operate at variable input-to-output ratios. At least one controller is programmed to reduce the operating ratio of the CVT in response to the engine-speed sensor indicating the engine is operating at idle speed and the wheel-speed sensor indicating the velocity is approximately zero. This provides less noise, vibration and harshness in the vehicle due to the reduced ratio that is possible during conditions in which a vehicle launch in that reduced ratio may not be acceptable.


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    Titel :

    Continuously variable transmission (CVT) ratio control


    Beteiligte:
    JIANG HONG (Autor:in) / DAI ZHENGYU (Autor:in) / CHEN WEITIAN (Autor:in) / SARGENT TIMOTHY L (Autor:in) / XU YANG (Autor:in)

    Erscheinungsdatum :

    2018-07-31


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    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 / F16H Getriebe , GEARING



    Ratio changing the continuously variable transmission

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


    Ratio Changing the Continuously Variable Transmission

    Mahoney, J. E. / Maguire, J. M. / Bai, S. et al. | British Library Conference Proceedings | 2004


    Ratio Changing the Continuously Variable Transmission

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


    Ratio changing the continuously variable transmission

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


    Ratio Changing the Continuously Variable Transmission

    Maguire, Joel M. / Mahoney, John E. / Bai, Shushan | SAE Technical Papers | 2004