An actual slip amount (S) of a torque converter is calculated by subtracting an actual input shaft rotational speed (Nr) of an automatic transmission from an engine rotational speed (Ne), which is the rotational speed of a crankshaft. Then, an engine rotational speed for display (Nd) is calculated by adding a slip amount adjusted for display (Sp), which is obtained by applying a predetermined correction process to the actual slip amount (S) to the actual input shaft rotational speed (Nr). The above described correction process may be a first-order-lag filter processing, for example. Thus, even when the actual slip amount (S) temporarily increases or decreases, a temporary increase or decrease in the engine rotational speed for display (Nd) may be suppressed. In other words, fluctuation or variation in the engine rotational speed for display (Nd) is suppressed. Further, Further, it is possible to provide the driver with a visually excellent direct-feeling display of engine speed Nd without impairing the drivability.


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    Title :

    ROTATIONAL SPEED DISPLAY DEVICE


    Additional title:

    DREHZAHLANZEIGEVORRICHTUNG
    DISPOSITIF D'AFFICHAGE DE VITESSE DE ROTATION


    Contributors:

    Publication date :

    2019-03-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F16H Getriebe , GEARING



    ROTATIONAL SPEED DISPLAY DEVICE

    YAMAMOTO YOSHINORI | European Patent Office | 2017

    Free access

    ROTATIONAL SPEED DISPLAY DEVICE

    YAMAMOTO YOSHINORI | European Patent Office | 2018

    Free access

    Rotational speed display device

    YAMAMOTO YOSHINORI | European Patent Office | 2019

    Free access

    ROTATIONAL SPEED DISPLAY DEVICE

    YAMAMOTO YOSHINORI | European Patent Office | 2018

    Free access

    ROTATIONAL SPEED DISPLAY DEVICE

    YAMAMOTO YOSHINORI | European Patent Office | 2017

    Free access