Cylinder head for internal combustion engine

A cylinder head of an internal combustion engine configured to cover a plurality of combustion chambers of the engine, comprising:

• a plurality of fastener bosses configured for receiving insertion of fasteners that, in an engaged condition, fasten the cylinder head to a cylinder block of the engine;
• and
• a bottom deck side of the cylinder head disposed near the cylinder block in the engaged condition, wherein
• at least two bosses disposed between two adjacent combustion chambers in an engaged condition comprise boss cutouts formed on the bottom deck side of the two bosses such that a contact pressure balance of sealing forces is shared between fasteners inserted in the two bosses.

A cylinder head of an internal combustion engine configured to cover at least two adjacent combustion chambers of the engine, each of the chambers having an intake valve and an exhaust valve positioned on its side near the adjacent chamber, comprising:

• an outer enclosure;
• a plurality of fastener bosses, each boss being configured for receiving insertion of a fastener that, in an engaged condition, fastens a bottom deck side of the cylinder head to a cylinder block of the engine;
• and
• a cavity formed within the outer enclosure, the cavity being formed generally in a shape of an inverted pyramid having a parallelogram-shaped upper face defining an upper wall of the cavity, and an apex pointing toward the bottom deck side of the cylinder head, wherein a central portion of the upper face of the pyramid is disposed at a position equidistant from centerpoints of each of the valves disposed between the two adjacent chambers.

A cylinder head of an internal combustion engine, comprising:

• an exhaust valve seat configured to engage an exhaust valve of a combustion chamber of the engine and an intake valve seat configured to engage an intake valve of the same combustion chamber;
• and
• a coolant jacket formed in the cylinder head, the coolant jacket comprising
• a coolant outlet disposed on an exhaust side of the cylinder head;
• a first coolant inlet disposed on an exhaust side of the cylinder head and a second coolant inlet disposed on an intake side of the cylinder head;
• an annular exhaust valve seat coolant passage extending along a circumference of the exhaust valve seat;
• and
• an annular intake valve seat coolant passage extending along a circumference of the intake valve seat, wherein
• the coolant outlet, the first and second coolant inlets, the exhaust valve seat coolant passage, and the intake valve seat coolant passage are fluidly coupled.