Coated piston and a method of making a coated piston
AssigneeFederal-Mogul Corporation
InventorWarran Boyd Lineton
Life of this patent
Estimating the term…
Abstract
A piston for a diesel internal combustion engine including a crown portion at least partially formed of steel and having a combustion surface with a combustion bowl formed therein is provided. The combustion bowl presents a combustion bowl rim area, and a coating including at least one of a noble metal and a refractory metal is applied to substantially only the combustion bowl rim area. The coating is preferably applied in the areas of the combustion bowl rim area that are in line with the sprays of diesel fuel when the piston is in a top dead center position during operation of the engine.
Claims14
A piston for a diesel engine, comprising:
- a crown portion fabricated of steel and presenting a combustion surface having a combustion bowl with a bowl rim area;
- and
- a coating including at least one of a noble metal and a refractory metal selectively applied to at least one portion of said bowl rim area and wherein said coating is substantially only applied to said bowl rim area of said crown portion,
- wherein said at least one coated portion of said bowl rim area is disposed adjacent a portion of said bowl rim area which is not coated with said coating including at least one of a noble metal and a refractory metal.
A piston for a diesel engine, comprising:
- a crown portion fabricated of steel and presenting a combustion surface having a combustion bowl with a bowl rim area;
- and
- a coating including at least one of a noble metal and a refractory metal selectively applied to a plurality of portions of said bowl rim area and wherein said coating is substantially only applied to said bowl rim area of said crown portion, and
- wherein each of said coated portions of said bowl rim area is spaced from another one of said coated portions of said bowl rim area by a portion of said bowl rim area which is not coated with said coating including at least one of a noble metal and a refractory metal.
Dependencies are inferred from the claim text.