本文提出了一种改进的EPISO(发动机用算子分割压力隐式算法)算法—EPISOC,该方法特别适合用于内燃机燃烧的计算。EPISOC算法省掉了作为EPISO算法关键内容之一的块调整,而采用一个标量校正步代替。EPISOC通过与柴油雾化的离散液滴模型与阿累尼乌斯动能与涡破裂模型的杂交模型的结合。可模拟柴油机燃烧过程。本文通过一个应用实例对该计算结果与KIVA经典模拟的结果以及实验结果进行了对比。 In this paper, we propose an improved EPISO (Engine Operator Partitioned Pressure Implicit Algorithm) algorithm, EPISOC, which is especially suitable for the calculation of internal combustion engine combustion. The EPISOC algorithm eliminates the need for block tuning as one of the key aspects of the EPISO algorithm, instead of using a scalar calibration step. EPISOC is combined with a hybrid model of discrete droplet model with diesel atomization and Arrhenius kinetic and vortex rupture model. Diesel combustion process can be simulated. In this paper, an example is given to compare the calculation results with the KIVA classical simulation results and the experimental results.