Evaluation of transient responces of differential pressure valve used for railroad vehicle utilizing pneumatically controllable leveling rod

Abstract

It is crucial to grasp dynamic characteristics of leveling valves (LV) and differential pressure valves (DPV) used for railroad vehicles when discussing the dynamic motion property of the vehicle, in particular the running safety. From this viewpoint, it is desirable to evaluate the LV and DPV responses while they are actually mounted on the vehicle. However, the test method which able to evaluate such responses have not been established yet. In this paper, the author proposes a stationary test method to evaluate in-situ responses of LV and DPV by utilizing “pneumatically controllable leveling rod.”