Patent ID: 11859576
Assignee: PROGRESS RAIL LOCOMOTIVE INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A cylinder head comprising:
a cylinder head casting including a top deck surface, a fire deck having a lower fire deck surface, and a middle deck, and the cylinder head casting having formed therein a coolant cavity extending around an exhaust conduit and an intake conduit each extending through the fire deck, and an injector bore;
the injector bore including a cylindrical upper bore section formed by an injector well extending downwardly from the top deck surface to the coolant cavity, a sleeve tip hole extending through the fire deck, and a cylindrical middle bore section extending upwardly from the sleeve tip hole and terminating at an upward facing middle deck surface, and the cylindrical middle bore section being formed by a cylindrical surface extending from an upward facing fire deck surface to the upward facing middle deck surface;
the upper bore section, the middle bore section, and the sleeve tip hole, are arranged coaxially about a bore center axis; and
the upward facing middle deck surface extends circumferentially and discontinuously around the bore center axis, and a plurality of coolant feed openings are each formed in part by discontinuities in the upward facing middle deck surface and fluidly connect the middle bore section to the coolant cavity,
wherein the plurality of coolant feed openings include open-channel coolant feed openings,
wherein the cylinder head casting further includes at least one closed-channel coolant feed opening fluidly connected to the middle bore section at a location axially between the upward facing middle deck surface and the sleeve tip hole,
wherein the open-channel coolant feed openings are four in number, and the at least one closed-channel coolant feed opening fluidly connects to the middle bore section at a location circumferentially between two of the open-channel coolant feed openings around the bore center axis.