Shaped core for main bearing oil feed groove

A product comprising a casting having a surface defining a main bearing feed groove and a surface defining at least one oil feed groove, the surface defining the main bearing feed groove and the surface defining the at least one oil feed groove intersecting so that a smooth flow path is defined through the main bearing feed groove and into the at least one oil feed groove;

• wherein the at least one oil feed groove comprises a first oil feed groove and a second oil feed groove intersecting the main bearing feed groove;
• wherein the casting includes a first arc shaped surface and a second arc shaped surface in part defining a cavity in the casting, further comprising a bearing having a cylindrical outer surface engaging the first arc shaped surface and the second arc shaped surface of the casting;
• wherein the cavity includes the first oil feed groove and the second oil feed groove and a mouth portion communicating with the first oil feed groove and the second oil feed groove and the main bearing feed groove, wherein the first oil feed groove is defined at least in part by a first concave surface in the casting, and the second oil feed groove is defined at least in part by a second concave surface in the casting, wherein the first oil feed groove is spaced a distance D1 from the first concave surface to the cylindrical outer surface of the bearing, wherein the second oil feed groove is spaced a distance D2 from the second concave surface of a cylindrical bearing;
• a first convex surface intersecting the surface defining the main bearing feed groove and the surface defining the at least one oil feed groove so that the smooth flow path is defined through the main bearing feed groove and into the at least one oil feed groove;
• and wherein the casting includes a second convex surface intersecting the surface defining the second oil feed groove and the surface defining the main bearing feed groove.

A method comprising:

• placing a casting core in a casting mold and pouring molten metal into the casting mold;
• allowing the molten metal to cool to form a solidified metal and to form at least a portion of a casting;
• removing the casting core to leave a cavity in the solidified metal configured to receive a bearing;
• forming a main bearing feed groove in the solidified metal communicating with the cavity in the solidified metal, wherein the main bearing feed groove is defined by a main bearing feed groove surface and the cavity in the solidified metal is defined in part by at least a first convex surface intersecting an oil feed groove surface and the main bearing feed groove surface;
• the method producing a product comprising:
• an engine block comprising the casting having the surface defining the main bearing feed groove and the surface defining at least one oil feed groove, the first convex surface intersecting the surface defining the main bearing feed groove and surface defining the at least one oil feed groove so that a smooth flow path is defined through the main bearing feed groove and into the at least one oil feed groove;
• wherein the surface defining the at least one oil feed groove comprises a first surface defining a first oil feed groove and a second surface defining a second oil feed groove;
• and wherein the casting includes a second convex surface intersecting the second surface defining the second oil feed groove and the surface defining the main bearing feed groove.

A product comprising:

• an engine block comprising a casting having a surface defining a main bearing feed groove and a surface defining at least one oil feed groove, a first convex surface intersecting the surface defining the main bearing feed groove and the surface defining the at least one oil feed groove, wherein the surface defining the at least one oil feed groove comprises a surface defining a first oil feed groove and a surface defining a second oil feed groove;
• and wherein the casting includes a second convex surface intersecting the surface defining the second oil feed groove and the surface defining the main bearing feed groove;
• a first concave surface defining the first oil feed groove and a second concave surface defining the second oil feed groove;
• wherein the surface defining the first oil feed groove and the surface defining the second oil feed groove are asymmetrical;
• wherein the first convex surface has a first radius and the second convex surface has a second radius different than the first convex surface;
• wherein the casting includes a first arc shaped surface and a second arc shaped surface in part defining a cavity in the casting, further comprising a bearing having a cylindrical outer surface engaging the first arc shaped surface and the second arc shaped surface of the casting.