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 ...

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 ...

When I first started working for HOT ROD magazine more than 30 years ago, nearly all American domestic production cars used a thick, 5/64-5/64-3/16-inch piston-ring package. The top, usually ...

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 ...