抄録
The poppet-type Brake Pressure Control valve (BPC valve) was proposed in the first report for use in hydraulic control systems for the friction brake of railway rolling stock. In this study, a simplified transfer function of the valve is determined to analyze the effects and choose the parameters for the valve. In order to shorten the trial-and-error process to determine the best valve parameters, mathematical simulations are performed. The validity of the mathematical model and effectiveness of actual orifices is studied experimentally. Simulations of pressure response and stability of the valve in the presence of disturbances are confirmed experimentally. The performance of the actual brake system is studied using a caliper brake device from the Shinkansen railway. The results show that the performance of brake pressure control can be improved by the hydraulic system with the developed BPC valve.
