Abstract:In order to realize the simulation calculation of the dynamic load wear of heavy vehicle diesel engine cylinder piston ring,the dynamic load work condition characteristic and its effect on wear of diesel engine were analyzed,based on the wear sample surface topography SEM analysis on the steady load and dynamic load condition,the simplification dynamic load abrasion mechanism for cylinder piston ring was suggested.According to the method of response surface fitting and the wear test data,the predictor formula for the coefficient of wear in the Archard wear model was created based on the loading work condition parameters and the topography characteristic parameters.The wear calculating model was validated by two group dynamic load wear test data.The results show that the calculation error of surface roughness is 59%,the calculation error of wear extent degree is 739%,the wear calculating model is precise and can be used for cylinder piston ring wear simulation calculation in vehicle engine.