In recent years a great deal of attention has been paid to the study of lubrication and wear of piston rings and cylinder liners. On one hand there is the more theoretical approach :limed at an understanding of the piston ring geometry, oil film thickness, etc. . On the other hand, cylinder liners taken out of service have been examined in an attempt to identify the wear mechanisms . Although the three main mechanisms of scuffing, abrasion, and currosive wear have been identified it was necessary to take liners removed from service and cut pieces from them for examination using optical and electron optical techniques. A wide range of sensors are now available to monitor the condition of I.-ylinder bores during service to help the uperator to detect potential trouble before it can develop too far.This work suggests that scuffing is a frequent short term occurrence. TE 99 通用摩擦磨損試驗機(jī)