Piston for internal combustion engine has piston head side regions of gudgeon-pin hub reinforced radially inward, and oil outflow borings directed to these regions

摘要

The piston (1) has an annular cooling channel (5) with oil inflow borings (17) and oil outflow borings (18) directed towards the gudgeon-pin hub (10) to cool it. The piston head side regions (12) of the gudgeon-pin hub are reinforced radially inward, and the oil outflow borings are directed towards these regions.