它由液壓控製，主要零部件有製動盤、分泵、製動鉗
、youguandeng。zhidongpanyonghejingangzhizaobinggudingzaichelunshang
，suichelunzhuandong。fenbenggudingzaizhidongqidedibanshanggudingbudong。zhidongqianshangdelianggemocapianfenbiezhuangzaizhidongpandeliangce。fenbengdehuosaishouyouguanshusonglaideyeyazuoyong
，tuidongmocapianyaxiangzhidongpanfashengmocazhidong
，dongzuoqilai**好象用鉗子鉗住旋轉中的盤子，迫使它停下來一樣。

        zhezhongzhidongqisanrekuai
，zhongliangqing，gouzaojiandan
，tiaozhengfangbian。tebieshigaofuzaishinaigaowenxingnenghao，zhidongxiaoguowending，erqiebupanishuiqinxi，zaidongjiheelielukuangxiaxingche，panshizhidongbigushizhidonggengrongyizaijiaoduandeshijianneilingchetingxia。youxiepanshizhidongqidezhidongpanshanghaikailexuduoxiaokong，jiasutongfengsanretigaozhidongxiaolv。fanguangushizhidongqi，youyusanrexingnengcha
，zaizhidongguochengzhonghui**大量的熱量。製動蹄片和輪鼓在高溫影響下較易發生極為複雜的變形
，容易產生製動衰退和振抖現象，引起製動效率下降。