Abstract :
It has become necessary to optimize cylinder liner and piston ring surface finish design in order to achieve
lesser friction, greater durability and decreased oil consumption in internal combustion engines. The frictional losses
taking place at the engine liner-piston ring interface affects the efficiency of the engine.The effectiveness of the
lubrication affects the coefficient of friction and the resulting wear between sliding surfaces. Retention of lubricant
during sliding of surfaces is one of the major problems encountered in liner ring interface. One of the methods to
achieve good lubrication is by making oil pockets on the surface of the sliding components. This study focuses on
the influence of oil pocket distribution on the effectiveness of lubrication in the liner ring interface. Oil pockets were
made on two sets of ring samples with two different coatings. To analyze the wear behavior, reciprocating wear tests
were performed on liner-ring samples at different experimental conditions. Three basic parameters such as load,
temperature and frequency were varied for the analysis. It was observed that the coefficient of friction as well as
wear was found to be comparatively low in the case coated ring with dimples.
Keyword :
Cylinder Liner, Piston ring, Dimples, Lubrication, Base Oil.