Provided is an electric power-assist device which can be used to retrofit and convert an existing bicycle to a power assisted bicycle with ease, and enables proper power assist control in response to the pedaling force, without major modifications to the bicycle. The device comprises an electric motor 58 connected to a crankshaft 24 or a crankarm 28 of a bicycle 10; a rotational angle sensor 130 for detecting a crank rotational angle of the crankshaft; an acceleration sensor 134 for detecting an acceleration level in a traveling direction of the bicycle; and a control unit 150 for controlling the electric motor 58, wherein the control unit comprises: a pedaling force estimator 152 for estimating a pedaling force based on an acceleration level measured at a predetermined crank rotational angle; and a motor drive controller 158 for controlling the electric motor 58 based on the estimated pedaling force.


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    Title :

    VEHICLE HOOD


    Additional title:

    FAHRZEUGHAUBE
    CAPOT DE VÉHICULE


    Contributors:

    Publication date :

    2023-08-16


    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 / B62J Fahrrad- oder Motorradsättel oder -sitze , CYCLE SADDLES OR SEATS



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