Piston for an internal combustion engine

Abstract

The invention relates to a piston (10) for an internal combustion engine made of an iron-based material, comprising a piston head (11) and a piston skirt (12), said piston head (11) comprising a piston base (13), a peripheral top land (15) and a peripheral annular part (16) comprising annular grooves (17a, 17b, 17c). According to the invention, at least one annular groove (17a, 17b) comprises at least one insert (24, 27) made of an zinc-based material.

Description

technical field [0001] The invention relates to a piston for an internal combustion engine made of an iron-based material, comprising a piston head and a piston skirt, wherein the piston head has a piston crown, a surrounding top land and a surrounding annular groove portion including an annular groove. Background technique [0002] A problem with modern internal combustion engines, especially diesel engines, is that the exhaust gases produced during combustion are corrosive. This problem primarily concerns pistons made of iron-based materials such as steel. The ring grooves of such pistons are subject to further wear due to this corrosive effect. As a result, the ring groove and the piston ring accommodated in the ring groove prematurely lose their sealing function against the combustion space on the top side of the piston. [0003] WO 03 / 025365 A1 discloses a solution for providing an electroless nickel-based anti-corrosion coating for pistons made of iron-based material...

AI Technical Summary

Problems solved by technology

[0002] The problem with modern internal combustion engines, especially diesel engines, is that the exhaust gases from the combustion process are corrosive

The disadvantage is that, during engine operation, this type of protection wears off prematurely in the area of ​​the ring groove and thus loses its anti-corrosion effect

Furthermore, coating such a protective layer with a thickness of more than 3 μm is too costly for mass production

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