Engine piston and a process for making an engine piston
AssigneesMahle Metal Leve S/A, Mahle International GmbH
InventorsPaulo R. Vieira De Morais, Antonio E. Meirelles Tomanik, Denys Flores
Life of this patent
Estimating the term…
Abstract
A piston for an internal combustion engine may include a substantially circular body composed of an aluminum containing base material defining a top portion having at least one cavity. At least one coating layer may be disposed on at least one area defined by at least one of the top portion and the at least one cavity. The at least one coating layer may include at least one chemical compound derived from a chemical reaction between the base material of the body and the at least one coating layer in response to friction generated by a dragging movement of a non-consumable rotary pin with the at least one coating layer.
Claims20
A piston for an internal combustion engine, comprising:
- a substantially circular body composed of an aluminum containing base material defining a top portion having at least one cavity, and at least one coating layer disposed on at least one area defined by at least one of the top portion and the at least one cavity, wherein the at least one coating layer includes at least one chemical compound derived from a chemical reaction between the base material of the body and the at least one coating layer in response to friction generated by a dragging movement of a non-consumable rotary pin on the at least one coating layer.
A process for producing an engine piston of an internal combustion engine, comprising:
- providing a substantially circular body composed of an aluminum base material defining a top portion,
- applying a coating layer onto at least one area defined by the top portion, and
- forming at least one chemical compound in the coating layer via a chemical reaction between the base material and the coating layer, wherein the chemical reaction is activated by friction generated from dragging a non-consumable rotary pin on the coating layer.
A piston for an internal combustion engine, comprising:
- a body composed of an aluminum base material, the body including a top portion having an upper surface and an annular cavity;
- at least one coating layer disposed at least partially on the upper surface and the cavity of the top portion, the at least one coating layer composed of at least one of pure copper, oxidized copper, aluminum, alumina, boron carbonitride and carbon nanotubes;
- wherein the at least one coating layer includes a dispersion of at least two chemical compounds derived from a chemical reaction between the aluminum base material and the at least one coating layer in response to friction generated via a relative dragging movement of a non-consumable rotary pin on the at least one coating layer, wherein the at least two chemical compounds respectively include at least one of Al2Cu(s), Al2O3, Cu° and Cr2O3.
Dependencies are inferred from the claim text.