本文根据直喷式四冲程柴油机缸内工作过程特点，利用充排法将柴油机分成若干个控制容积，推导出描述柴油机工作过程的数学模型。基于P．(1)方法建立了瞬时摩擦模型。
在对云内动力股份有限公司生产的4100QB柴油发动机试验的基础上，结合建立的柴油机数学模型，并引入模块化建模思想，建立了基于Simulink的柴油机零维仿真模型。对模型进行了仿真，仿真结果与试验结果较为吻合。论证了仿真模型的正确性以及利用Simulink进行柴油机建模与仿真的有效性。(Based on the 4100QB diesel engine of Kunming Yannei Power Co.LTD and the mathematic models,introduced modularity modeling idea,a zero-dimension simulation
model of diesel engine based on software Simulink is built and raiL The simulated results are accorded witll the tested data and it proves that the model is accurate and modeling and simulation using software Simulink is valid in diesel engine.)