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地质勘探用内燃机，是钻探工作的主要动力机械，它担负着繁重的生产任务。由于负载经常变化，迁孔时经常拆装，加上维护不周，很容易发生故障。现将工作中所发现的几个问题及解决办法叙述如后。（一）内燃机在工作过程中，如果负载稳定，维护周全，它发出的音响、温度，机油压力等应该是正常的。但有时工人说“柴油机没有劲”，引擎冒烟浓黑，甚至冒出火花，这一般来说是由于以下原因：
The internal combustion engine for geological exploration is the main power machine for drilling work. It is responsible for the heavy production tasks. Due to the frequent changes in the load, the frequent removal and relocation of the holes, combined with poor maintenance, are prone to failure. Several problems and solutions found in the work are described later. (1) During the working process of the internal combustion engine, if the load is stable and well-maintained, the sound, temperature, and oil pressure that it emits should be normal. However, sometimes workers say that “diesel is not strong”, the engine smokes dark and even emits sparks. This is generally due to the following reasons: