A speed-changing method of bicycle suitable for controlling a gear ratio of a bicycle is provided. The bicycle has a front electronic derailleur, a rear electronic derailleur, a controller, and a controlling switch. The controller stores a gear-ratio table. The speed-changing method of bicycle includes the following steps. The controlling switch is triggered to generate a speed-increasing signal or a laborsaving signal. The controller controls the front and rear electronic derailleurs according to the speed-increasing signal or the laborsaving signal to increase the gear ratio along a speed-increasing path of the gear-ratio table or decrease the gear ratio along a laborsaving path of the gear-ratio table respectively. On the other hand, the front and rear electronic derailleurs are started simultaneously at a first switch point of the speed-increasing path or a second switch point of the laborsaving path, and the first switch point is different from the second switch point.


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    Title :

    SPEED-CHANGING METHOD OF BICYCLE


    Additional title:

    GANGWECHSELVERFAHREN FÜR EIN FAHRRAD
    PROCÉDÉ DE CHANGEMENT DE VITESSE D'UNE BICYCLETTE


    Contributors:

    Publication date :

    2021-03-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer



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