利用发动机的部分气缸作为压气机用，让它生产运输机械本身所需的压流空气。这种转换系统在国外的汽车上已有使用。本文论述了将这一系统用到内燃机车柴油机上的可能性。介绍了供тэм7型调车内燃机车装用的2—2л49型柴油机用的试验型转换系统，它可使该车少用一台空气压缩机。作者认为这种系统是经济的，是可行的。 Part of the engine cylinder is used as a compressor, allowing it to produce the compressed air required by the transport machinery itself. This conversion system has been used in foreign cars. This article discusses the possibility of using this system for diesel locomotives. The pilot conversion system for the 2-2л49 diesel engine used for the тэм7 shunting diesel locomotive is introduced, which makes it possible to use only one air compressor for the car. The author believes that such a system is economical and feasible.