Abstract: Systems are provided for cooling a cylinder block via bore bridge cooling passages. In one example, a cylinder block with a bore bridge positioned between a first cylinder and a second cylinder, the cylinder block also including a coolant jacket at least partially surrounding the first cylinder and the second cylinder, has at least one cooling passage positioned within the bore bridge. An inlet of the at least one cooling passage has a larger area than an outlet of the at least one cooling passage and at least a portion of the at least one cooling passage has a non-cylindrical geometry formed by a lost core.

Abstract: Systems are provided for cooling a cylinder block via bore bridge cooling passages. In one example, a cylinder block with a bore bridge positioned between a first cylinder and a second cylinder, the cylinder block also including a coolant jacket at least partially surrounding the first cylinder and the second cylinder, has at least one cooling passage positioned within the bore bridge. An inlet of the at least one cooling passage has a larger area than an outlet of the at least one cooling passage and at least a portion of the at least one cooling passage has a non-cylindrical geometry formed by a lost core.

Abstract: Methods and systems are provided for a water jacket diverter. In one example, the water jacket diverter has a continuous upper rail with a profile including curved and linear portions where the profile of the upper rail is optimized to moderate coolant flow through the water jacket. The water jacket diverter further includes at least one protrusion extending outwards from an outer face of the diverter, the at least one protrusion positioned in front of a coolant inlet.

Abstract: Methods and systems are provided for a water jacket diverter. In one example, the water jacket diverter has a continuous upper rail with a profile including curved and linear portions where the profile of the upper rail is optimized to moderate coolant flow through the water jacket. The water jacket diverter further includes at least one protrusion extending outwards from an outer face of the diverter, the at least one protrusion positioned in front of a coolant inlet.

Abstract: Systems are provided for cooling a cylinder block via bore bridge cooling passages. In one example, a system may include a cylinder block with a first cylinder and a second cylinder adjacent to the first cylinder and a bore bridge positioned between the first cylinder and the second cylinder, the cylinder block further including a coolant jacket at least partially surrounding the first cylinder and the second cylinder. The system may further include a cooling passage positioned within the bore bridge, the cooling passage including an inlet fluidly coupled to the coolant jacket and an outlet positioned at a deck face of the cylinder block, the cooling passage curving from the inlet to the outlet with a curvature greater than zero.

Abstract: An engine is provided with an open deck cylinder block having an open water jacket that surrounds a plurality of cylinders that are joined together in a Siamese design by a cylinder bore bridge. The engine also includes a cylinder head gasket, and a cylinder head. For the purpose of removing excess heat from the cylinder bore bridge, cooling channels are provided that allow coolant to flow from the engine block water jacket, across the cylinder bore bridge, and into a cylinder head coolant passageway. In addition, coolant is prevented from flowing from the water jacket on one side of the cylinders, across the bore bridge, and into the water jacket on the other side of the cylinders.

Abstract: An engine is provided with an open deck cylinder block having an open water jacket that surrounds a plurality of cylinders that are joined together in a Siamese design by a cylinder bore bridge. The engine also includes a cylinder head gasket, and a cylinder head. For the purpose of removing excess heat from the cylinder bore bridge, cooling channels are provided that allow coolant to flow from the engine block water jacket, across the cylinder bore bridge, and into a cylinder head coolant passageway. In addition, coolant is prevented from flowing from the water jacket on one side of the cylinders, across the bore bridge, and into the water jacket on the other side of the cylinders.