Piston for an internal combustion engine.

摘要

A piston (1) for an internal combustion engine has a piston-ring groove (2) which is strengthened with a composite layer (3) based on porous metal which is embedded around the piston-ring groove (2). The porous metal contains at least 10% Cr, and the volumetric ratio of the porous metal is between 8 to 70%, so that even when the engine is operated under high heat loads, no crack will be initiated in the piston (1).