Piston for an internal combustion engine with a shaft
AssigneeMahle International GmbH
InventorsCedric Dobua, Zeynep Kara
Life of this patent
Estimating the term…
Abstract
A piston for an internal combustion engine may include a shaft. A dual-layer coating with an inner layer and an outer layer may be applied to the shaft. The inner layer may include organic binders and solid lubricants. The inner layer may also include hard material particles of at least one of tungsten disulphide (WS2), tungsten carbide (WC), silicon carbide (SiC), and aluminium oxide (Al2O3). The outer layer may include inorganic binders, may be air-hardening, and may have a lower wear resistance than the inner layer.
Claims20
A piston for an internal combustion engine, comprising a shaft, wherein:
- a dual-layer coating with an inner layer and an outer layer is applied to the shaft;
- the inner layer includes organic binders and solid lubricants;
- the inner layer includes hard material particles of at least one of tungsten disulphide (WS2), tungsten carbide (WC), silicon carbide (SiC), and aluminium oxide (Al2O3);
- and
- the outer layer includes inorganic binders, is air-hardening and has a lower wear resistance than the inner layer.
An internal combustion engine comprising at least one piston having a shaft, wherein:
- a dual-layer coating with an inner layer and an outer layer is applied to the shaft the inner layer includes organic binders and solid lubricants;
- the inner layer includes hard material particles of at least one of tungsten disulphide (WS2), tungsten carbide (WC), silicon carbide (SiC), and aluminium oxide (Al2O2);
- and
- the outer layer includes inorganic binders, is air-hardening, and has a lower wear resistance than the inner layer.
A method for applying a coating to a shaft of a piston comprising:
- applying an inner layer to the shaft;
- applying an outer layer to the shaft in liquid form via one of spraying, brushing, and pad printing;
- and
- hardening the outer layer via air;
- wherein the inner layer includes organic binders and solid lubricants;
- wherein the inner layer includes hard material particles of at least one of tungsten disulphide (WS2), tungsten carbide (WC), silicon carbide (SiC), and aluminium oxide (Al2O3), and
- wherein the outer layer includes inorganic binders, is air-hardening, and has a lower wear resistance than the inner layer.
Dependencies are inferred from the claim text.