US 11,655,776 B1
Cylinder block casting slab core cast geometry for sawcut entrance enhancement
Ronald John Petrus, Lake Orion, MI (US); Richard M. Nichols, III, Macomb, MI (US); Brian C. Leuenhagen, Clarkston, MI (US); William A. Berry, Davison, MI (US); Qigui Wang, Rochester Hills, MI (US); and James T. Singer, Defiance, OH (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Mar. 25, 2022, as Appl. No. 17/704,535.
Int. Cl. F02F 1/16 (2006.01); B22C 9/10 (2006.01)
CPC F02F 1/16 (2013.01) [B22C 9/10 (2013.01); F02F 2200/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An automobile vehicle engine, comprising:
multiple water jackets individually formed in a cast engine block proximate to successive ones of multiple cylinder bores;
multiple cast-in place transition regions individually formed during a casting operation of the cast engine block at entrances to individual ones of the multiple water jackets;
multiple sawcuts having individual ones of the multiple sawcuts opening into individual ones of the multiple cast-in place transition regions; and
a curved region of the multiple cast-in place transition regions which opens into one of the multiple water jackets, the curved region formed during casting at a junction of individual ones of the multiple water jackets and individual ones of the cast-in place transition regions,
wherein the multiple cast-in place transition regions define a semi-circular shaped slot extending through the curved region.