Coolant jacket core (16) for producing a cylinder crank housing (10) with a narrow ridge width, comprises at least an integral base core (20), which comprises at least two adjacently arranged core body in hollow cylindrical section form, and a bar core (18), which interconnects the opposite radial…

The cylinder head comprises an exhaust manifold (22), and a cooling circuit (40) fitted to inner side of the cylinder head by liquid coolant. The cooling circuit comprises a concave cooling chamber (52) laid between walls of the exhaust manifold to collect gas trapped in the cooling circuit, an…

In a method of manufacturing a cylinder head having a partition plate for an intake port, there is prepared a partition plate having an intake-side distal end and a cylinder-side distal end. The partition plate is located in a core to form the intake port and molten metal is supplied to a periphery…

A partition plate (tumble plate) for an intake port is previously placed in an intake port molding sand core (port core) for forming an intake port of a cylinder head, and cast-in as the cylinder head is cast-molded, to partition the intake port into a plurality of ports. The partition plate is…

A partition plate (100) (cast-in object plate member) is preliminarily set in an intake-port forming sand core (200), by which an intake port (14) of a cylinder head (10) is molded, and cast in during cast molding of the cylinder head for partitioning the intake port. The partition plate has both…

The cylinder head of an internal combustion engine is medium-cooled, each cylinder having an annular cooling medium chamber encompassing the cylinder, and cooling medium channels (6a,6b). The cylinder head in the direction from the combustion chamber plate (2) to an upper cylinder head cover side…