The invention discloses a vehicle power-assisted brake device capable of reducing pedal travel. The vehicle power-assisted brake device comprises a brake master cylinder, a hydraulic distribution cylinder body, a power piston, a slide valve and a feedback piston, a main cylinder piston is arranged in the brake main cylinder, the slide valve is mounted in the power piston, and one end of the slide valve extends out of the power piston and can be connected with a brake pedal of an automobile; the power piston is installed in the hydraulic distribution cylinder body and divides an inner cavity of the hydraulic distribution cylinder body into a pre-filling cavity and a boosting cavity. A stroke piston is axially arranged in the pre-filling cavity, the diameter of the stroke piston is larger than that of the main cylinder piston, and the stroke piston can move front and back along with the power piston. The stroke piston is additionally arranged, the piston size of the portion, located on the pre-charging end side, of the power piston is actually increased, the power piston moves by the same distance, and more brake fluid can be discharged. Therefore, under the condition that the liquid demand of the calipers is the same, the pedal stroke of the scheme is shorter.

    本发明公开了一种减小踏板行程的车辆助力制动装置,包括制动主缸、液压分配缸体、动力活塞、滑阀和反馈活塞;所述制动主缸内设主缸活塞,所述滑阀安装在动力活塞内,一端伸出动力活塞外可与汽车的制动踏板联接;所述动力活塞安装在液压分配缸体内,将液压分配缸体的内腔分隔成预充腔和助力腔前后两个腔室;在所述预充腔内轴向设置行程活塞,所述行程活塞的直径大于主缸活塞的直径,所述行程活塞可随动力活塞前后移动。增设行程活塞,实际上增大了动力活塞位于预充端侧部分的活塞体积,使动力活塞移动相同的距离,可排出更多的制动液。因此在卡钳需液量要求一样的情况下,本方案的踏板行程更短。


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    Title :

    Vehicle power-assisted braking device capable of reducing pedal travel


    Additional title:

    一种减小踏板行程的车辆助力制动装置


    Contributors:
    LIU PEI (author) / WEN ZUOLI (author) / LAN KEZHI (author) / JIA XIANPENG (author)

    Publication date :

    2024-04-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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



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