Piston rings

In addition to the task of sealing off the combustion chamber, piston rings also have the function of dissipating the heat that arises in the piston to the cylinder surface and that of controlling the oil balance. As temperature, pressures, and rotational speeds continue to rise, piston rings are subjected to ever increasing loads. Concepts for lower wear and friction, better sealing, and greater break resistance are in demand. MAHLE is therefore continuously developing new coatings and ring design variants.