东风型(包括东风3)内燃机车问世以来,电路设计几经改进,使电路趋于完善合理。但经过十余年的运用实践证明,电路也还存在一些不合理和不完善的地方,因而影响了该型内燃机车的运用可靠性。本文就东风型内燃机车电路设计方面的几个问题进行了讨论,并提出了改进设想,以供参考。 Dongfeng (including Dongfeng 3) diesel locomotive since the advent of the circuit design has been improved to make the circuit tends to improve and reasonable. However, after more than ten years of practice, it has been proved that there are still some unreasonable and imperfect circuits in the circuit, thus affecting the reliability of the application of the diesel locomotive. In this paper, several issues about the circuit design of DFM locomotive are discussed and some suggestions for improvement are put forward for reference.