Modeling and experimental investigation of wear and roughness for honed cylinder liner during running-in process

The tribological property of piston ring and cylinder liner has a great influence on exhaust emissions and service performance of internal combustion engines. To explore the effects of surface topography on tribological property of coated piston ring and honed cylinder liner, the hydrodynamic contact model, asperity contact model and wear model during running-in process are established. Considering the non-Gaussian propert y of rough surfaces into the contact models, the influences of surface parameters on contact pressure are investigated. Due to the influence of operational condition on lubrication performance, the degradation rate of oi l is taken into the wear model. Based on this, the change characteristics of the wear process, coefficient of friction and roughness are investigated. To veri f y the validity of the proposed models, the tribological test is conducted. The results show that the numerical results are in good agreement with the experimental results, and reasonable surface parameters can improve the anti-wear performance of the system during running-in process.

Automated summary

The tribological property of piston ring and cylinder liner plays a significant role in the exhaust emissions and service performance of internal combustion engines. This study investigates the effects of surface topography on the tribological property of coated piston ring and honed cylinder liner. The established contact and wear models, considering the non-Gaussian property of rough surfaces and the degradation rate of oil, provide insights into the change characteristics of the wear process, coefficient of friction, and roughness. The tribological test confirms the validity of the proposed models and demonstrates that reasonable surface parameters can enhance the anti-wear performance of the system during the running-in process.