According to the present invention, an electric parking brake device holds a parking brake in a braking state by a rotation-linear motion conversion mechanism that converts rotation of an electric motor into motion in a linear direction, and releases the parking brake by the rotation-linear motion conversion mechanism. In the case of releasing the parking brake, the electric motor is driven in accordance with pulse width modulation (PWM) control, and when a predetermined time has elapsed after start of the PWM control, the electric motor is changed to drive in accordance with the ON/OFF control. In the ON/OFF control, a change in which a drive current of the electric motor is decreased in stepwise manner is detected, and thus torque drop of the rotation-linear motion conversion mechanism is detected.

    본 발명에 따른 전동 파킹 브레이크 장치는, 전동 모터의 회전을 직선 방향의 운동으로 변환하는 회전-직동 변환 기구에 의해, 파킹 브레이크를 제동 상태로 유지하며, 또한 상기 회전-직동 변환 기구에 의해 해제한다. 파킹 브레이크를 해제하는 경우에, 전동 모터를 PWM 제어로 구동하고, PWM 제어의 개시로부터 소정 시간 경과하면 온/오프 제어에 의한 구동으로 변경한다. 온/오프 제어에서, 전동 모터의 구동 전류가 스텝형으로 저하되는 변화를 검출함으로써, 회전-직동 변환 기구의 토크 빠짐을 검출할 수 있다.


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    Titel :

    ELECTRIC PARKING BRAKE SYSTEM AND METHOD FOR RELEASING THE SAME


    Weitere Titelangaben:

    전동 파킹 브레이크 장치 및 그 해제 방법


    Beteiligte:
    TAKEI OSAMU (Autor:in)

    Erscheinungsdatum :

    2016-02-15


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen



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