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本文结合二冲程废气涡轮增压柴油机建立了对柴油机工作过程进行数学模拟的微分方程式，确定了各热力系统的数学模型：缸内的燃烧率是利用实测的示功图算出的放热率用插值法进行计算的。缸内的瞬时传热率计算采用了Ｇ．Ｗｏｓｃｈｎｉ提出的经验公式和数据。扫气过程采用了分层扫气模型并考虑了短路的影响。排气管内的过程是用容积法计算的。增压器的配合运行是利用特性曲线在准稳定的基础上用插值法进行计算的。在数值计算中采用了ＰＣＭ法（预校法）和Ｗｅｇｓｔｉｅｎ法结合使用的方法。
In this paper, differential equations of mathematical modeling of diesel engine working process are established based on two-stroke turbocharged diesel engine. The mathematical model of each thermodynamic system is established. The combustion rate in the cylinder is calculated by using the measured dynamometer. Law to calculate. The instantaneous heat transfer rate in the cylinder is calculated using G. Woschni’s empirical formula and data. The scavenging process uses a stratified scavenging model and takes into account the effects of short circuits. The process inside the exhaust pipe is calculated by the volumetric method. Turbocharger with the operation of the curve is based on the use of quasi-stable interpolation method to calculate. In the numerical calculation using the PCM method (pre-school method) and Wegstien method used in combination.