RAILWAY VEHICLE BRAKE PRESSURE CONTROL DEVICE, AND CONTROL METHOD THEREFOR

The present invention relates to an apparatus for controlling a brake pressure of a railway vehicle, including: a microcomputer controller and a brake pressure regulation mechanism, where the brake pressure regulation mechanism includes a deflation valve, a holding valve, and a pressure sensor configured to feed back a brake pressure to the microcomputer controller; and a holding solenoid valve and a deflation solenoid valve that are controlled by the microcomputer controller, where a main air supply is connected to air inlets of the holding solenoid valve, the deflation solenoid valve, and the holding valve respectively, an air outlet of the holding solenoid valve is connected to first pressure ports of the deflation valve and the holding valve, an air outlet of the deflation solenoid valve is connected to second pressure ports of the deflation valve and the holding valve, a deflation port of the deflation valve is in communication with the atmosphere, and pressure output ports of the deflation valve and the holding valve are connected to a brake pipe. The deflation valve and the holding valve are driven through the holding solenoid valve and the deflation solenoid valve, to perform inflation, deflation, and pressure holding for the brake pressure, and implement closed-loop control. The present invention has the features of high control accuracy, a rapid response, and being free from impact of performance changes or degradation of valves.