辅助制动系统广泛使用于客车上, 它可使客车下长坡时保持稳定车速, 并减轻或解除行车制动系的负荷, 大大提高客车行驶的安全性。 关键词: 客车; 排气制动; 电涡流缓速器; 工作原理 Abstract:A uxiliary brake system isw idely used in buses1It can keep the speed stable sliding, ligh ten o r remove the load of themain brake system w hen a bus go ing dow n a long slope road1 So, it can no tably imp rove the bus safety great ly1 Key words:Bus; Exhaust brake; Elect romagnet ic retarder; Wo rk ing p rincip le