ONE-PIECE PISTON FEATURING ADDITIVE MACHINING PRODUCED COMBUSTION BOWL RIM AND COOLING GALLERY
First Claim
1. A piston for an internal combustion engine, comprising:
- a crown portion and a skirt portion formed from a first material;
a combustion surface disposed along the crown portion, wherein at least a portion of the combustion surface is formed from a second material by an additive machining process; and
a heat affected zone defined by a first edge along the first material and a second edge along the second material, wherein the first edge has a shape following the shape of the second edge.
7 Assignments
0 Petitions
Accused Products
Abstract
A piston capable of withstanding high temperatures and extreme conditions of a combustion chamber of an internal combustion engine and manufactured with reduced costs is provided. The method of manufacturing the piston includes casting or forging the bulk of the piston as a single-piece with an open cooling gallery from an economical first material, such as steel, cast iron, or aluminum. The method further includes forming a portion of a combustion bowl surface, which is a small area of the piston directly exposed to the combustion chamber, from a second material by additive machining. The second material has a higher thermal conductivity and higher resistance to oxidation, erosion, and oil coking, compared to the first material. The additive machining process is efficient and creates little waste, which further reduces production costs.
-
Citations
3 Claims
-
1. A piston for an internal combustion engine, comprising:
-
a crown portion and a skirt portion formed from a first material; a combustion surface disposed along the crown portion, wherein at least a portion of the combustion surface is formed from a second material by an additive machining process; and a heat affected zone defined by a first edge along the first material and a second edge along the second material, wherein the first edge has a shape following the shape of the second edge. - View Dependent Claims (2, 3)
-
Specification