Piston with a cooling gallery

A piston for an internal combustion engine, comprising:

• a first interior surface, the first interior surface defining at least a portion of a cooling gallery of the piston;
• a first annular surface defining at least a portion of an annular passageway of the piston that allows for fluid communication between an outer surface of the piston and an entrance to the cooling gallery defined by the annular passageway;
• and
• a first deflector located along the first interior surface and extending to the entrance to the annular passageway;
• the deflector configured to extend into the cooling gallery to generally limit fluid flow from the cooling gallery to the outer surface of the piston.

A method of assembling a piston, comprising:

• providing a piston crown having a crown annular surface and a crown interior surface;
• providing a piston skirt including a skirt annular surface and a skirt interior surface;
• welding the piston crown to the piston skirt, wherein the crown interior surface cooperates with the skirt interior surface to define a cooling gallery and a cooling gallery surface within the piston;
• and
• abutting the crown annular surface and the skirt annular surface with a predetermined force, wherein the predetermined force generally maintains the crown annular surface and skirt annular surface in abutment, thereby generally limiting fluid flow from the cooling gallery to an outer surface of the piston, wherein abutting the crown annular surface and the skirt annular surface with the predetermined force includes compressing the piston crown and the piston skirt against each other before a weld between the piston crown and piston skirt is hardened.

A piston for an internal combustion engine, comprising:

• a piston crown including a crown annular surface and a crown interior surface;
• and
• a piston skirt including a skirt annular surface and a skirt interior surface, the crown interior surface cooperating with the skirt interior surface to define a cooling gallery and a cooling gallery surface within the piston;
• wherein the crown annular surface and the skirt annular surface are abutted against each other with a predetermined force, thereby generally maintaining the crown annular surface and skirt annular surface in abutment and generally limiting fluid flow from the cooling gallery to an outer surface of the piston;
• wherein at least one of the crown annular surface and the skirt annular surface extend away from the outer surface of the piston and into the cooling gallery to form a deflector along the cooling gallery surface adjacent the annular passageway for limiting fluid flow from the cooling gallery to the outer surface of the piston.