Effect of Thermodynamic Irreversbility of Internal Combustion Engines on Power Output and Thermal Efficiency

On the basis of the model of thermal resistance loss between working substance and heat reservoirs, further given consideration to cooling medium taking heat quantity and heat transfer loss in internal combustion engines thermodynamic process, correspondent mathematic models are set up. Formulas of power output and thermal efficiency of internal combustion engines are derived by considering the above irreversible factors, and the contrast of calculating results and experiment data is presented.