本文介绍了柴油机循环模拟的用途及其分类,讨论了模拟柴油机燃烧过程的两种模型——喷注混合燃烧模型及油滴燃烧模型。对用于排气管过程计算的容积法和特征线法作了比较,并给出了实例。循环模拟中常碰到的一些其他问题,比如气体的热力性质、空气运动、传热等,本文也作了简要的分析。 In this paper, the purpose and classification of diesel engine cycle simulation are introduced. Two models for simulating the combustion process of diesel engine are discussed-jet mixed combustion model and oil droplet combustion model. A comparison of the volumetric method and the characteristic method for calculating the exhaust pipe process is given, and an example is given. Some other problems often encountered in the cycle simulation, such as the thermal properties of the gas, air movement, heat transfer, etc., this article also made a brief analysis.