Cylinder head having bore locations arranged for tight packaging of gas exchange and fuel system components

An engine system comprising:

• an engine housing including a cylinder block and a cylinder head forming a combustion cylinder;
• a piston movable in the combustion cylinder between a bottom dead center position and a top dead center position to increase in-cylinder pressure to an autoignition threshold for air and an injected liquid fuel;
• a fuel injector including a nozzle tip within the combustion cylinder, and spray outlets formed in the nozzle tip;
• the cylinder head including an upper surface, a lower surface forming a fire deck, and having formed therein an injector bore defining an injector bore center axis, and four gas exchange openings in the fire deck;
• the four gas exchange openings are arranged at twelve o'clock, three o'clock, six o'clock, and nine o'clock positions, respectively, circumferentially around the injector bore center axis when viewed from above the cylinder head;
• the cylinder head further having formed therein a bolt bore defining a bolt bore center axis, positioned angularly between the twelve o'clock position and the three o'clock position, circumferentially around the injector bore center axis, and a glow plug bore positioned angularly between the three o'clock position and the six o'clock position, circumferentially around the center axis;
• a clamp coupled to the fuel injector;
• and
• a bolt within the bolt bore and extending through the clamp to clamp the fuel injector to the cylinder head within the injector bore.

A cylinder head comprising:

• a cylinder head casting including an upper surface, a lower surface forming a fire deck, and having formed therein an injector bore defining an injector bore center axis and extending through the cylinder head casting between the upper surface and the lower surface, and four gas exchange openings in the fire deck;
• the cylinder head casting further having formed therein a bolt bore defining a bolt bore center axis parallel to the injector bore center axis;
• the four gas exchange openings are arranged at twelve o'clock, three o'clock, six o'clock, and nine o'clock positions, respectively, circumferentially around the injector bore center axis when viewed from above the cylinder head casting;
• and
• the bolt bore being positioned angularly between the twelve o'clock position and the three o'clock position, circumferentially around the injector bore center axis, and closer to the twelve o'clock position than to the three o'clock position.