| 摘要 |
Pin bosses of a piston for an internal combustion engine each have a pin bore for supporting a piston pin. In order to reduce the tangential stresses in the zenith area of the pin bores, and thus to extend the service life of the piston, the inner areas of the pin bores as viewed in the direction of the bore axis have areas on both sides of the zenith that have a greater distance from the bore axis than the zenith of the pin bore, and the outer areas of the pin bores, as viewed in the direction of the bore axis, are transversely oval relative to the piston axis. |
| 主权项 |
1. Pin bosses (1) of a piston (2) for an internal combustion engine, each pin boss having a pin bore (3) with bore axis (13), for mounting a piston pin (14), the pin bore having an inner region extending toward an inside surface of the pin boss and an outer region extending toward an outside surface of the pin boss,
wherein
the inner regions (16) of the pin bores (3), seen in the direction of the bore axis (13), have regions (11, 12) on both sides of the zenith (4), which have a greater distance from the bore axis (13) than the zenith (4) and an equator that lies between the zenith and a nadir of the pin bore (3),the zenith (4) of the pin bore (3) has a lesser distance from the bore axis (13) in the inner region (16) of the pin bores (3) than the nadir (5) of the pin bores (3) in said inner region,the outer regions (17) of the pin bores (3), seen in the direction of the bore axis (13), are configured to be longer in a horizontal direction than in a vertical direction, with regard to the vertical piston axis (7),the inner regions (16) of the pin bores (3) make a constant transition into the outer regions (17) of the pin bores (3) andthe nadir (5) of the inner regions (16) of the pin bores (3), seen in the direction of the bore axis (13), is configured to be longitudinally oval in the direction of the piston axis (7). |
