SCUFFING FAILURE ANALYSIS AND EXPERIMENTAL SIMULATION OF PISTON RING-CYLINDER LINER

The scuffing failure phenomenon of piston ring-cylinder liner is studi ed theoretically and experimentally The load and bulk temperature when scuffing failure occurs are measured under different engine speed, lu bricant, and environmental temperature in a bench test. Based on the e xperimental results, the asperity capacity when scuffing occurs is eva luated. Surface contact temperature is determined with the measured bu lk temperature and the surface flash temperature calculated by Blok th eory. The scuffing failure threshold of piston ring-cylinder liner is established by using specific oil film thickness.