| 摘要 |
Pin bosses (1) are proposed for the piston (2) of an internal combustion engine, having in each case one pin bore (3) which has a zenith-side ovality in the region (15) of the bore center (7), wherein the zenith-side ovality of the pin bore (3) increases starting from the bore center (7) radially to the outside and radially to the inside, and the nadir-side ovality increases starting from the bore center (7) radially to the inside. As a result, the shape of the pin bore (3) is adapted to every load-dependent deformation of the piston pin. As a result of this, in addition, the lubrication of the piston pin is improved in the region of the bore center (7).
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