本文通过内燃机各受热件温度场及热流有限元计算、内燃机性能计算、活塞环油膜有限差分计算等多种模型的相互耦合 ,建立了内燃机整机散热量计算模型 ;利用该模型预测了内燃机各受热件喷涂不同厚度隔热陶瓷情况下整机的散热量及零件间散热量分配 ,研究了隔热对内燃机整机散热量的影响 ,得到了一些有关内燃机整机散热量分布及不同隔热方案对整机散热影响的结论 In this paper, by calculating the temperature field of heat engine and finite element calculation of heat flow, calculation of internal combustion engine performance, finite difference calculation of piston ring oil film and other models, the heat dissipation calculation model of the whole engine is established. By using this model, Piece of different thickness of insulating ceramic case of heat dissipation and heat distribution between the parts, study the heat insulation on the internal combustion engine heat dissipation, obtained some of the internal combustion engine heat dissipation distribution and different insulation programs The cooling effect of the whole conclusion