The invention provides a tractor trailer brake hydraulic system which comprises an oil pump, a trailer brake oil cylinder and a foot brake valve, a one-way valve is arranged on an outlet oil path of the oil pump, a brake main path and a first pressure relief branch path are arranged at an outlet of the one-way valve, a brake branch path and a release branch path are arranged at the outlet end of the brake main path, and the brake branch path is connected with the trailer brake oil cylinder; a brake release valve is arranged on the release branch; the first pressure relief branch is connected with a pilot control valve, and an outlet of the pilot control valve is connected with an overflow valve; the outlet end of the foot brake valve is connected with one end of a valve element of the pilot control valve. According to the invention, the parking brake of the trailer is realized through the trailer brake oil cylinder; oil liquid enters a trailer brake oil cylinder through the one-way valve, the brake main path and the brake branch path, and brake release is achieved. The pilot control valve is controlled to be closed through the foot brake valve, and temporary braking of the trailer is achieved. The tractor trailer is braked immediately after parking and released immediately after running, and operation convenience and timeliness are improved.

    本发明提供了一种拖拉机拖车制动液压系统,包括油泵、拖车制动油缸、脚制动阀,油泵的出口油路上设有单向阀,单向阀的出口设有制动主路和第一泄压分路,制动主路的出口端设有制动支路和释放支路,制动支路连接拖车制动油缸;释放支路上设有制动释放阀;第一泄压分路连接有先导控制阀,先导控制阀的出口连接有溢流阀;脚制动阀的出口端连接先导控制阀的阀芯一端。采用本发明,通过拖车制动油缸实现拖车驻车制动;油液通过单向阀、制动主路和制动支路进入拖车制动油缸,实现制动解除;通过脚制动阀控制先导控制阀关闭,实现拖车的临时制动;拖拉机拖车停车即制动,行车即解除,提高操作便捷性和及时性。


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    Title :

    Brake hydraulic system of tractor trailer


    Additional title:

    拖拉机拖车制动液压系统


    Contributors:
    LI DEFANG (author) / TAN HONGYANG (author) / FAN PENGBO (author) / HUANG LILI (author) / SUN WENYONG (author) / LIU YONGJIAN (author) / SUN SIYU (author) / WANG HUSHENG (author) / LI HUIQIANG (author) / LI HAO (author)

    Publication date :

    2024-07-19


    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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