为了对列车实施制动,制动管减压是分阶段进行的。但是,有时某一辆车的控制阀会作用不良,不是移动到要求的常用制动位,而是进入紧急制动位。其结果是,不仅这一辆车要发生意外的紧急制动,而且,由于意外紧急作用向前后两个方向的传播,其它车辆也要发生紧急制动。由此而带来的问题是要求尽快地查找出有故障的控制阀。通常的方法是,关闭列车的一只折角塞门,将列车分成两半,对前半部列车再充气,检查是否还会出现意外紧急制动。如果前半部没有问题,则将后半部再分成两半来试验,直至找到有故障的控制阀。显然这是 In order to brake the train, brake pipe decompression is carried out in phases. However, sometimes a vehicle control valve will not work well, not to move to the required common brake position, but to enter the emergency brake position. As a result, not only does this car have an accidental emergency brake, but also other vehicles need to have an emergency brake because of the unexpected emergency effect of being transmitted in both directions. The problem that arises from this is that it is required to find the faulty control valve as soon as possible. The usual method is to close the berth of a train, split the train in half, re-inflate the first half of the train, and check for accidental emergency braking. If there is no problem in the first half, then test the second half in half until you find the faulty control valve. Obviously this is