故障现象一辆东风莲花中型客车,在下长坡连续使用行车制动时,突然出现制动失灵的故障。故障诊断该车仪表盘上有一个双指针气压表,黄色指针指示前储气筒气压,白色指针指示后储气筒气压。排空前储气筒中的压缩空气,起动发动机,当黄色指针上升到 Failure phenomenon A Dongfeng Lotus medium-sized passenger car, in the continuous use of traffic under the long brakes, the sudden failure of the brake failure. Troubleshooting The car dashboard has a double-pointer barometer, the yellow pointer indicates the pressure of the former reservoir, and the white pointer indicates the pressure of the reservoir. Empty the compressed air in the accumulator, start the engine, and raise the yellow indicator