通过电子控制空气悬架(ECA S) 系统在JT6120HD 低地板城市客车上的应用, 介绍ECA S 系统的特点、结构原理及使用方法等。 关键词: ECA S 系统; 城市客车; 应用 Abstract:A ccording to the service of electronic control air suspension (ECA S) system in JT6120HD low floor city bus, th is paper introduces the functions, structure features and app lication w ays of the ECA S system1 Key words: ECA S system; City bus; App lication