Investigation into the effects of waviness present on the cam surface profile of an engine camshaft
The results of an investigation into the effects of wavy surface topography on the wear and oil retention characteristics of the bearing surface of an automobile camshaft are presented. The cam surfaces were traced in the pre-worn and worn conditions, using a Talysurf 5 measurement instrument which has been developed to enable both two and three-dimensional measurements. Examples are presented showing the effects of waviness on surface performance when under wear. It is shown that similar oil retention values can be achieved in a surface with waviness removed. Also, the unwavy topography presents an improved area of contact which, it is suggested, would give a more even wear pattern. ?? 1989.