全面地介绍了ТЭП70型客运内燃机车的风动系统的工作过程及管路图，其中包括制动系统、压缩空气准备系统和自动装置供风管路系统。详细讲述了电力制动和空气制动的相互作用及各种制动阀的作用。最后指出风动系统的功能是否正常大多数情况下取决于压缩空气的准备质量，即其清洁和干燥程度。为此在ТЭП70型内燃机车上安装了自动再生不加热短循环的一级吸附装置，以确保其风动系统的工作。 This paper introduces the working process and piping diagram of pneumatic system of ТЭП70 passenger diesel locomotive, including brake system, compressed air preparation system and automatic device for air supply system. Detailed description of the power brake and air brake interaction and the role of a variety of brake valve. Finally, it is pointed out that the function of the air moving system is normal. In most cases, it depends on the preparation quality of compressed air, that is, the degree of cleaning and drying. To this end, the ТЭП70 diesel locomotive is equipped with an automatic regenerative first-stage adsorption unit without heating short cycle to ensure the operation of its pneumatic system.