The parking brake drive-by-wire system of the unmanned vehicle comprises a brake oil way composed of an oil pump, an energy accumulator and a negative brake pair, a liquid filling electromagnetic valve is connected between the oil pump and the energy accumulator, and a negative brake releasing electromagnetic valve is connected between the energy accumulator and the negative brake pair; a first energy accumulator pressure detection switch and a second energy accumulator pressure detection switch are sequentially connected between the liquid filling electromagnetic valve and the energy accumulator. And a brake valve pressure detection switch is connected between the energy accumulator and the negative brake release electromagnetic valve. The invention further provides a control method for parking braking of the unmanned vehicle. The brake-by-wire parking brake control mode of negative brake and pressure switch detection is adopted, closed-loop detection is conducted on the brake state when the brake-by-wire device breaks down, and therefore a series of safety problems caused by friction plate damage due to the fact that the whole vehicle runs with brake due to the brake fault or no feedback due to brake failure are avoided.

    本发明公开了一种无人驾驶车辆驻车制动线控系统,包括由油泵、蓄能器和负制动副构成的制动油路,所述油泵和蓄能器之间连接有充液电磁阀,蓄能器和负制动副之间连接有负制动解除电磁阀;所述充液电磁阀和蓄能器之间依次连接蓄能器压力检测开关一、蓄能器压力检测开关二;所述蓄能器和负制动解除电磁阀之间连接有制动阀压力检测开关。同时还提供一种无人驾驶车辆驻车制动的控制方法。本申请采用负式制动及压力开关检测的线控驻车制动控制方式,实现线控制动装置故障时对制动状态进行闭环检测,从而避免因制动故障导致整车带着制动行驶造成摩擦片损坏或者因制动失效而无反馈造成的一系列安全问题。


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    Titel :

    Unmanned vehicle parking brake drive-by-wire system and control method


    Weitere Titelangaben:

    一种无人驾驶车辆驻车制动线控系统及控制方法


    Beteiligte:
    JIN SHIZHUO (Autor:in) / ZHAO FEI (Autor:in) / LI LIMING (Autor:in) / GAO XINYING (Autor:in) / WU YANFEI (Autor:in)

    Erscheinungsdatum :

    2023-01-06


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



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