Methods and systems are provided for selectively re-cooling intake air downstream of a charge air cooler. In one example, a system may include a cylinder head defining a plurality of cylinders, the cylinder head including a plurality of inlet ports each fluidically coupled to a respective cylinder, a refrigerant supply, and a refrigerant passage surrounding each inlet port and fluidically coupled to the refrigerant supply, the refrigerant passage shaped to correspond to an outer profile of each inlet port.

Methods and systems are provided for selectively re-cooling intake air downstream of a charge air cooler. In one example, a system may include a cylinder head defining a plurality of cylinders, the cylinder head including a plurality of inlet ports each fluidically coupled to a respective cylinder, a refrigerant supply, and a refrigerant passage surrounding each inlet port and fluidically coupled to the refrigerant supply, the refrigerant passage shaped to correspond to an outer profile of each inlet port.

Methods and systems are provided for selectively re-cooling intake air downstream of a charge air cooler. In one example, a system may include a cylinder head defining a plurality of cylinders, the cylinder head including a plurality of inlet ports each fluidically coupled to a respective cylinder, a refrigerant supply, and a refrigerant passage surrounding each inlet port and fluidically coupled to the refrigerant supply, the refrigerant passage shaped to correspond to an outer profile of each inlet port.

An engine having an integrated heat exchanger includes a cylinder head defining combustion chambers; an intercooler embedded at an intake side in the cylinder head and cooling intake gas by using a coolant; an EGR cooler embedded in the cylinder head and cooling exhaust gas, which is discharged from an exhaust side of the combustion chambers and recirculates to the intake side of the combustion chambers through an EGR passageway formed in the cylinder head; and an EGR distribution tube formed at an upper side in the cylinder head, supplied with the exhaust gas passing through the EGR cooler, and having distribution holes through which the exhaust gas is distributed into intake ports connected with the combustion chambers.

An engine having an integrated heat exchanger includes a cylinder head defining combustion chambers; an intercooler embedded at an intake side in the cylinder head and cooling intake gas by using a coolant; an EGR cooler embedded in the cylinder head and cooling exhaust gas, which is discharged from an exhaust side of the combustion chambers and recirculates to the intake side of the combustion chambers through an EGR passageway formed in the cylinder head; and an EGR distribution tube formed at an upper side in the cylinder head, supplied with the exhaust gas passing through the EGR cooler, and having distribution holes through which the exhaust gas is distributed into intake ports connected with the combustion chambers.

A cylinder head assembly for an internal combustion engine includes a cast cylinder head, a turbocharger housing integrally cast with the cylinder head, and a water jacket cast into the integrally cast turbocharger housing and configured to receive a flow of coolant for cooling the integrally cast turbocharger housing. The assembly can also include a wastegate housing integrally cast with the cylinder head and the turbocharger housing, and a water jacket cast into the integrally cast wastegate housing. The water jacket is configured to receive a flow of coolant for cooling the integrally cast turbocharger housing and the integrally cast wastegate housing.

A cylinder head assembly for an internal combustion engine includes a cast cylinder head, a turbocharger housing integrally cast with the cylinder head, and a water jacket cast into the integrally cast turbocharger housing and configured to receive a flow of coolant for cooling the integrally cast turbocharger housing. The assembly can also include a wastegate housing integrally cast with the cylinder head and the turbocharger housing, and a water jacket cast into the integrally cast wastegate housing. The water jacket is configured to receive a flow of coolant for cooling the integrally cast turbocharger housing and the integrally cast wastegate housing.

An apparatus and method are presented for repairing damage to the boundary wall between an engine coolant passage and a fuel injector bore in a cylinder head. The method involves removing the fuel injector from the fuel injector bore adjoining the damaged boundary wall and inserting a purpose-built sealant injector tool into the fuel injector bore. The sealant injector tool is dimensionally equivalent to the fuel injector in critical regions so that it conforms to the interior surface of the fuel injector bore. Sealant is injected into the sealant injector tool at high pressure until the sealant flows into the crack between the fuel injector bore and the coolant passage after which the sealant injector tool is removed and the fuel injector reinstalled.

An engine cylinder head includes an internal metal structure formed from a metal material, at least a portion of which includes a thermal coating and an external polymer composite structure formed from a polymer composite material, wherein the external polymer composite structure at least partially surrounds the internal metal structure.

A water jacket for a cylinder block may include a first main body formed inside the cylinder block at a first side thereof, and a second main body formed at a second side thereof, and in which coolant flows, a first sub-body formed at an upper portion of the first main body, and a second sub-body formed at an upper portion of the second main body, each of the first and second sub-bodies being connected to an inside of a cylinder head to flow a coolant into an upper portion of the cylinder block and the cylinder head, a first insert member disposed between the first main body and the first sub-body to partition the first main body and the first sub-body, and a second insert member disposed between the second main body and the second sub-body to partition the second main body and the second sub-body.