KS ring sets are important components for rebuilding engines. For the intermediate overhauling of engines with liners, we recommend checking whether the pistons are satisfactory for continued operation and replacing the piston rings and cylinder liners. This will ensure good running in of the piston rings with the contact surface of the cylinder liner.

In general, we differentiate between compression rings, scraper rings and oil control rings. All of them have the primary function of sealing the combustion chamber against the crankcase.

The compression rings prevent leakage of combustion gases from the combustion chamber into the crankcase.

Scraper rings combine the function of the compression rings and the oil control rings, i.e. they seal combustion gases from the crank case as well as scraping surplus oil off the cylinder wall.

The function of the oil control rings is to scrape excessive oil from the cylinder wall and to prevent the passage of lubricating oil to the combustion chamber. The objective is to achieve low oil consumption while at the same time providing sufficient lubrication of the sliding parts and minimising the gas blowby.

Another important function of the rings is to dissipate part of the piston heat to the cooled cylinder wall. Most of the heat transfer takes place via the top ring and less via the other rings.

Inertia and gas loads as well as high temperatures impose high technical demands on the piston rings. It is only by an exact adjustment to the respective engine that optimum service life and compliance with the exhaust gas regulations are achieved.