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本文利用气体动力学原理建立的列车空气制动系统模型，预测了在“过管”条件下主补机不同匹配位置和不同动作时间差时，组合列车常用制动特性。预测结果表明：主补机同步制动时，补机的最佳位置应位于列车的约３／４处；调整补机位置和主补机动作时间差都可以改善列车制动同步性，但通过改变补机位置调整列车制动同步性效果更加理想。本工作的开展对组合列车的运输组织及操纵具有指导意义。
In this paper, the model of train air braking system established by the principle of gas dynamics is used to predict the common braking characteristics of the combined train when different matching positions and different operating time differences of main compensating machine are under the conditions of “overpassing”. The predicted results show that the optimal position of the prime mover should be located at about 3/4 of the train when the prime mover synchronously brakes; the synchronization of the train braking can be improved by adjusting the position of the prime mover and the time difference between the prime mover and the train, Compensate machine position adjustment train braking synchronization effect is more ideal. This work is instructive for the transport organization and operation of the combined train.