The Effect of Piston Ring Design Modification on Engine Performance Parameters.

Abstract

The majority of friction in an internal combustion engine occurs between the piston ring pack and the cylinder, which significantly affects the engine's mechanical efficiency. In the piston ring pack, the compression ring is the primary source of friction, particularly at high speeds where boundary lubrication takes place. According to research, altering the cross section of the piston rings can improve engine performance. When typical piston rings are being used, their rectangular cross section generates surface contact with the cylinder liner. The engine's performance weakens as a result of higher friction losses resulting from the friction between the piston ring and the cylinder liner. The difference in pressure at the bottom part of the top ring should be maintained to a minimum so as to avoid friction. Minimizing friction on top rings involves minimizing exposure to high pressure differentials in this field since the compression and combustion processes have an influence on the pressure differential, which will not be altered in the present investigation. This can be made possible by the trapezoidal form of the piston ring. In this present study, we have investigated and compared the engine performance parameters  using conventional and modified trapezoidal piston ring design .