In a conventional application, there are three rings per piston. The top ring is called the compression ring. Its purpose is to seal the combustion gas pressure, transfer heat from the piston to the ...

SAE Transactions, Vol. 96, Section 7: FUELS AND LUBRICANTS (1987), pp. 240-257 (18 pages) Extensive measurements of oil film temperature and mainly of friction losses have been performed on an ...

Tribological evaluation of the interaction between a piston ring and the cylinder liner is a key step toward understanding engine tribology. This kind of test helps automotive manufacturers to comply ...

Few processes in assembling an engine are as tedious as filing piston rings. It requires patience and precision, carefully fitting the top and middle rings to each bore. It's not something for an ...

Piston ring grooves serve a larger purpose than simply supporting the rings. They impact combustion sealing, oil control, friction, and many more engine attributes. Wiseco is a world leader in piston ...