(一)前言我国东风型内燃机车的电阻制动装置于1965年10月在1223号机车上试验成功以来,发挥了一定的制动效能。但根据不少机务段反映,使用效率很低,司机一般不愿用。原因主要有三条:(1)操作不方便;(2)能用的速度范围太窄,速度稍高就没法用;(3)“劲”太小,顶不住,即制动功率太小。 (A) Preface China’s Dongfeng diesel locomotive resistance braking device in October 1965 in the 1223 locomotive test success, has played a certain braking efficiency. However, according to many depots reflect the use of low efficiency, the driver generally do not want to use. There are three main reasons: (1) inconvenient to operate; (2) the speed range can be used too narrow, the speed is not high; (3) “Jin” is too small, could not stand, that is, the braking power is too small .