Considering the influence of temperature rise during the process of friction on the hydrodynamic lubrication of piston ring/cylinder liner,a transient thermal hydrodynamic lubrication (TTHL) model was developed combined with Reynolds equation,film thickness equation,radial force equation,energy equation of oil film as well as heat flux continuity equation.Multigrid method and column by column scanning method were used for the calculation of pressure and temperature,respectively,and the effects of texture parameters on the TTHL were investigated.The results show that the temperature rise caused by friction has a obvious effect on the minimum oil film thickness and the maximum oil film pressure,indicating that the influence of temperature rise must be taken into account in the dynamic lubrication analysis of the piston ring/cylinder liner.The density and depth of textured surface have minor influence on the variation tendencies of the minimum oil film thickness,the maximum oil film pressure and the maximum oil film temperature,but a significant effect on their values.During the process of work stroke,smaller textured surface density and depth correspond to smaller maximum oil film pressure and maximum oil film temperature,and larger minimum oil film thickness.The research shows that in a certain range,the smaller textured surface density and depth has better fuel economy,otherwise,it has better lubricating reliability.