提出在柴油机控制系统模糊规则的设计中 ,确定最少模糊推理规则的原则 ,指出在论域为正负偏差时 ,最小隶属函数个数是 3时仍可满足控制精度要求 ;并建立了柴油机模糊PID控制器的三维模糊数学模型 ,该模型被用于一个 4输入 3输出 (4I3O)柴油机模糊控制器的设计中。 In the design of fuzzy rules of diesel engine control system, the principle of least fuzzy reasoning rule is determined. It is pointed out that when the universe of argument is positive and negative, the control precision can still be satisfied when the minimum membership number is 3. Controller of the three-dimensional fuzzy mathematical model, the model was used in a 4 input 3 output (4I3O) diesel fuzzy controller design.