Hubkolbenmaschine

摘要

The invention relates to a reciprocating piston engine with at least one cylinder whose cylinder liner (2) is provided with at least one groove-shaped oil pocket (8) in the area of the running surface (4) of said liner (2), whereby the running surface (4) is assigned to the piston (6). The oil pocket (8) is laterally defined by material areas which are provided with an enhanced resistance to wear capacity when compared with the base material of the cylinder liner (2) outside thereof. In order to obtain higher operational reliability, the material areas which respectively and laterally define one oil pocket (8) are configured as a filling (11) for a groove (10) whose depth (d) corresponds at least to the maximum wear and tear thickness of the cylinder liner (2).