The invention discloses a proportional relay valve and a pneumatic brake-by-wire system. The proportional relay valve comprises a main valve, a standby pressure electromagnetic valve, a pilot electromagnetic valve, an air inlet, an air outlet, an air vent and a pedal air supply port. The main valve comprises a brake cavity and is used for controlling connection or disconnection of an air channel between the air inlet and the air outlet and controlling connection or disconnection of the air outlet and the air outlet according to the air pressure of the brake cavity. The standby pressure electromagnetic valve is used for controlling an air path between the pedal air supply port and the brake cavity to be disconnected in the effective electric control stage and controlling the air path between the pedal air supply port and the brake cavity to be communicated in the failure electric control stage; and the pilot electromagnetic valve is used for controlling a gas circuit between the gas inlet and the brake cavity to be connected or disconnected in the effective electric control stage and controlling the gas circuit between the gas inlet and the brake cavity to be disconnected in the failure electric control stage. According to the technical scheme provided by the embodiment of the invention, the service life of the proportional relay valve is prolonged, and the occurrence probability of accidents caused by failure of the proportional relay valve is reduced.
本发明公开了一种比例继动阀及气压线控制动系统。所述比例继动阀包括主阀、备压电磁阀、先导电磁阀、进气口、出气口、放气口和脚踏板供气口;其中,主阀包括制动腔,主阀用于根据制动腔的气压,控制进气口和出气口之间的气路连通或断开,以及控制出气口与放气口连通或断开;备压电磁阀用于在电控有效阶段,控制脚踏板供气口与制动腔之间的气路断开,并在电控失效阶段,控制脚踏板供气口与制动腔之间的气路连通;先导电磁阀用于在电控有效阶段,控制进气口与制动腔之间的气路连通或断开,并在电控失效阶段,控制进气口与制动腔之间的气路断开。本发明实施例提供的技术方案,延长了比例继动阀寿命,降低了比例继动阀失效导致的事故的发生概率。
Proportional relay valve and pneumatic brake-by-wire system
一种比例继动阀及气压线控制动系统
2021-04-20
Patent
Elektronische Ressource
Chinesisch
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
Proportional valve type brake-by-wire system and control method thereof
Europäisches Patentamt | 2023
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