改革开放以来城乡经济得到了极大的发展,汽车运输业的竞争也日益激烈。我公司为适应竞争,购进大量轻型液压制动车辆,现有的700多辆客、货营运汽车中约500辆为轻型液压制动车。在营运中,这些车因制动系统发生的故障所引发的交通事故连续不断。尤其是1993年8月,连续发生三起客车下长坡液压制动失灵, Since the reform and opening up, urban and rural economy has made tremendous development, and the competition in the automobile transportation industry has also become increasingly fierce. In order to meet the competition, our company purchased a large number of light hydraulic brake vehicles. About 500 of the existing over 700 passenger and freight operated vehicles are light hydraulic brake trucks. In operation, these cars caused by continuous braking system failure caused by continuous traffic accidents. In particular, in August 1993, three consecutive bus failures caused by hydraulic braking under the long slope,