内燃机循环燃料能量“质-量”历程分析及应用

In order to reveal the source of energy quality loss and quantity dissipation during the whole cycle of converting chemical energy of internal combustion engine fuel into mechanical energy through thermodynamic energy of working medium, this paper started from the P-V and T-S diagrams of the cycle process, used the first law of thermodynamics and the second law of thermodynamics to obtain the enthalpy change of circulating working medium, and builded the "mass-quantity" process of circulating fuel energy of internal combustion engine. The main factors that affect the power performance of internal combustion engine are combustion work and ex-haust loss. Through the comparative analysis of lean combustion and natural aspirated internal combustion engine, the intuitionistic and feasibility of analyzing the energy flow direction of working medium through the "quality-quantity" course of fuel energy in in-ternal combustion engine cycle is verified, which provides a new intuitive way to analyze the thermal efficiency of internal combustion engine from the root.