Patent ID: 7225766

Claim:
A cooling jacket for an internal combustion engine having a cylinder bank including a plurality of longitudinally aligned cylinders centered on spaced parallel axes and having upper and lower ends, the cooling jacket comprising: upper and lower jacket walls extending outward from the upper and lower ends of the cylinders and intake and exhaust side jacket walls between the upper and lower walls and enclosing opposite charge inlet and exhaust outlet sides of the cylinders; the walls defining two inlet flow galleries extending along the intake and exhaust sides of the cylinder bank and communicating with the upper ends of the cylinders, two outlet flow galleries extending along the intake and exhaust sides of the cylinders and communicating with the lower ends of the cylinders, and pairs of side flow slots extending between the upper and lower galleries and around the intake and exhaust sides of each of the cylinders; the side flow slots being separated along longitudinal edges from the slots of adjacent cylinders; whereby cooling fluid introduced to the top of the cylinders through the inlet flow galleries is divided and directed down through the side flow slots of the several cylinders and collected into the outlet flow galleries for discharge to a heat exchanger.