【摘要】 根据气缸排气过程的特定情况及16V280ZJA型柴油机的工作循环模拟计算结果，指出在缸内排气过程中采用容积法的某些不足：未考虑缸内气体功能的影响、缸内气体流动与管内稳定流动的差别及排气模型气体流通进口截面的选择对计算流量的影响。考虑到这些因素，作者对气缸简图及排气模型进行一些修正，把气体动能对排气流量的影响考虑进去并重新选择气体流通进口截面，建立了一个新的排气模型。更多还原

【Abstract】 Specific conditions during cylinder exhaust and operating cycle simulation calculation results of 16V280ZJA diesel engines show the Volum Method being used for cylinder exhaust simulation calculation has some disadvantages: neglect-ing the influence of the difference between incylinder gas and in-pipe steady flow, incylinder gas kinelic energy and the choice of a gas flow iulet section in the exhaust model on calculation flow.Therefore,the authors modified the .Cylinder schematic and ex-haust model,considering the influence of gas kinetic energy on exhaust flow and choosing a gas flow inlet section again, and fi-nally set up a new exhaust model.更多还原