Piston for an internal combustion engine

摘要

A piston for an internal combustion engine comprises at least one cooling channel located only in the areas of at least one inflow and at least one outflow at a low level comparatively removed from the base of the piston and at a constant higher level closer to the piston base, said cooling channel comprising steep inclines between the areas located at the low and at the high level.

主权项

1. A piston for an internal combustion engine, comprising a plurality of ring grooves including an upper-most ring groove which extends about an axis, at least one annular cooling channel which is circumferentially continuous about the axis and has an inflow area and an outflow area and including a pair of higher main areas that each extend between the inflow and outflow areas, the annular cooling channel including two pairs of inclined transitions, a first pair of the inclined transitions connecting the higher main areas to a single inflow opening in the inflow area, and a second pair of the inclined transitions connecting the higher main areas to a single outflow opening in the outflow area such that no higher main areas are located axially above the inflow and outflow areas, the inflow and outflow areas being disposed at a lower level below that of the upper-most ring groove, and wherein the higher main areas do not deviate axially from a horizontal center plane and wherein at least the majority of the cross section of the higher main areas is disposed at a higher level that is at or above the upper-most ring groove and wherein the annular cooling channel includes inclined slopes that join the lower inflow and outflow areas with the higher main areas, and wherein at least the majority of the cross section of the higher main areas of the cooling channel includes a lower edge substantially at the same level as a lower edge of the upper-most ring groove.