The invention discloses a parking relay valve and a parking braking system, and belongs to the technical field of vehicle braking equipment.The parking relay valve comprises a valve shell, a main piston and a supply piston, the valve shell is provided with a parking cavity, a control cavity and a pop-up function cavity which are distributed in sequence, the main piston comprises a piston rod and a piston block, and the piston rod is arranged in the control cavity and the pop-up function cavity in a penetrating mode; the piston block is arranged in the control cavity, a main spring acting on the piston block is arranged in the control cavity, the parking cavity is provided with a first port connected with a PB system, the control cavity is divided into a PB braking sub-cavity and a PB control sub-cavity by the piston block, and an ejection sliding block arranged on the piston rod in a sleeving mode and an ejection spring acting on the ejection sliding block are arranged in the ejection function cavity. The pop-up sliding block can drive the main piston to move synchronously, and the pop-up functional cavity is divided into an environment pressure sub-cavity and a pop-up control sub-cavity by the pop-up sliding block. Automatic braking is achieved through the pop-up function cavity when the pressure of the braking loop is reduced to a certain degree, the vehicle can stop moving in time, and the safety of the vehicle in the running process is improved.
本发明公开了驻车继动阀及驻车制动系统,属于车辆制动设备技术领域,驻车继动阀包括阀壳、主活塞和供给活塞,阀壳设有依次分布的驻车腔、控制腔和弹出功能腔,主活塞包括活塞杆和活塞块,活塞杆穿设于控制腔和弹出功能腔中,活塞块设于控制腔中,控制腔中设有作用于活塞块的主弹簧,驻车腔设有与PB系统连接的第一端口,控制腔被活塞块分隔为PB制动分腔和PB控制分腔,弹出功能腔中设有套设于活塞杆上的弹出滑块和作用于弹出滑块的弹出弹簧,弹出滑块可带动主活塞同步移动,弹出功能腔被弹出滑块分隔为环境压力分腔和弹出控制分腔。通过弹出功能腔在制动回路压力减小到一定程度时实现自动制动,使车辆可以及时停止运动,提高车辆行驶时的安全性。
Parking relay valve and parking brake system
驻车继动阀及驻车制动系统
2023-01-17
Patent
Electronic Resource
Chinese
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |