Open AccessUpgrade of relay valve of SD type braking system for urban rail vehicles
Author(s) -
Fan Chen
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1237/4/042080
Subject(s) - automotive engineering , relay , brake , upgrade , piston (optics) , urban rail transit , dynamic braking , urban rail , braking system , engineering , computer science , transport engineering , physics , power (physics) , optics , quantum mechanics , wavefront , operating system
Based on the structure and principle of the seven-stages relay valve of the SD type brake system of the existing urban rail vehicle, it is simply modified to double increase the number of stages of the braking force by each additional solenoid valve and piston-diaphragm. Therefore, the adjustment of the braking force is finer and more suitable for the precise positioning and parking of urban rail transit vehicles.