基于模糊数学理论 ,研究了柴油机燃油系统的故障诊断方法。根据某自行火炮喷油压力的波形特点 ,分析确定了反映典型故障的特征参数。建立了模式分类标准 ,以此为依据确定柴油机燃油系统的性能状态 ,并给出了诊断实例 Based on fuzzy mathematics theory, the fault diagnosis method of diesel fuel system is studied. According to the waveform characteristics of the injection pressure of a self-propelled gun, the characteristic parameters reflecting typical faults were analyzed and determined. The model classification standard was set up, on the basis of which, the performance status of the diesel fuel system was determined and a diagnosis example