Piston for an internal combustion engine
AssigneeMan Truck & Bus AG
InventorsThomas Malischewski, Jens Dietrich, Daniel Zülow
Life of this patent
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Abstract
The present disclosure relates to a piston for an internal combustion engine. The piston comprises a cover which at least partially covers a piston basehead of the piston. A heat-isolating air gap is formed between the cover and the piston basehead, which is fluidically connected to a combustion chamber and/or an upper side of the cover facing away from the heat-isolating air gap. The fluidic connection permits a fluid exchange to take place between the heat-isolating air gap and the combustion chamber. In this way, a pressure gradient can be reduced between the combustion chamber and the heat-isolating air gap. As a result, the cover is/can be kept thin without being deformed during combustion.
Claims19
A piston for an internal combustion engine comprising:
- a piston crown for a piston-side delimitation of a combustion chamber of the internal combustion engine;
- and
- a cover which at least partially covers the piston crown, wherein, directly between the cover and the piston crown, there is formed a thermally insulating gap which has a fluidic connection to the combustion chamber and/or to a top side, averted from the thermally insulating gap, of the cover,
- wherein:
- the piston crown has a piston depression, and the cover is at least partially arranged in the piston depression and/or adapted to the piston depression;
- the piston depression is in the form of an omega-shaped depression and/or a stepped depression, and the cover at least partially has an omega-shaped and/or a stepped cross section;
- and
- the fluidic connection is formed at least partially by an annular gap between an inner circumferential edge of the cover and a central elevation of the piston depression.
Dependencies are inferred from the claim text.