Pin bosses of a piston for an internal combustion engine
AssigneeMahle International GmbH
InventorEberhard Fezer
Life of this patent
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Abstract
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).
Claims4
A pin boss of a piston for an internal combustion engine, comprising:
- a pin bore for mounting a piston pin, said pin bore being configured in the form of a circular cylinder, which has a zenith-side ovality in a region of a center of the bore, wherein the zenith-side ovality of the pin bore increases radially outward and radially inward, proceeding from the center of the bore, and a nadir-side ovality increases radially inward, proceeding from the center of the bore.
Dependencies are inferred from the claim text.