Research on comprehensive performance test system for proportional relay valve of commercial vehicle EBS

Abstract

The proportional relay valve is one of the core components of EBS. In this regard, high-speed data acquisition system and computer-based control technology were used to design the EBS proportional relay valve comprehensive performance test system. The test items mainly included hysteresis characteristic test, dynamic characteristic test, and sealing test. The open current/pneumatic test was introduced in the hysteresis characteristic. In order to verify the accuracy of the system, a proportional relay valve simulation model based on MATLAB/Simulink was designed. Combined with the measured data, the influences of different control methods on the performance of the proportional relay valve were tested and analysed. The results showed that the dynamic response time under the condition of electronic control was shorter than that under the condition of air control, and the decompression stability was worse under the condition of electronic control. The maximum hysteresis current was 0.23A. The maximum hysteresis pressure was 56.64kPa.