根据内燃机性能计算、活塞环油膜有限差分计算及内燃机受热零件温度场有限元计算等多种模型间热边界条件的耦合关系 ,建立了内燃机零部件及整机散热量预测的耦合模型。以现有内燃机的试验数据为基础 ,调整耦合模型的计算边界条件 ,从而外推进一步强化后内燃机的整机散热量 According to the calculation of the internal combustion engine performance, the finite difference calculation of the piston ring oil film and the finite element calculation of the temperature field of the heated part of the internal combustion engine, the coupling model of the thermal boundary conditions between the internal combustion engine parts and the whole machine is established. Based on the experimental data of the existing internal combustion engine, the calculation boundary conditions of the coupled model are adjusted so as to extrapolate the whole heat dissipation of the internal combustion engine