Cylinder head
AssigneeIsuzu Motors Limited
InventorMakoto Iida
Life of this patent
Estimating the term…
Abstract
A cooling water pipe is deformed so as to have outlet openings respectively placed in a position around a fuel injection nozzle and in a position between ports, and the cooling water pipe is inserted to be placed inside the cylinder head. Thereby, the position around the fuel injection nozzle and the position between the ports can be simultaneously and efficiently cooled, and the structure becomes simpler and the production becomes easier. In order to deform the cooling water pipe, for example, the cooling water pipe is bent first, and subsequently bulge forming by hydraulic pressure is performed. Preferably, the cooling water pipe is made of aluminum. Thereby, the cooling water pipe becomes easier to melt into when the cylinder head is cast.
Claims15
A cylinder head comprising:
- at least two ports, including at least one intake port and at least one exhaust port;
- at least one fuel injection nozzle;
- and
- at least one cooling water pipe having a plurality of outlet openings;
- wherein the cylinder head at least partially defines a water jacket at least partially surrounding the at least two ports and the at least one fuel injection nozzle, and the at least one cooling water pipe is arranged inside the water jacket such that the plurality of outlet openings are respectively placed in a position around the at least one fuel injection nozzle and in a position between at least two of the at least two ports.
A cylinder head comprising:
- four ports arranged such that each of the ports is in each corner of a square;
- at least one fuel injection nozzle placed in an approximate middle position of the four ports;
- and
- at least one cooling water pipe having a plurality of outlet openings respectively placed in a position around a fuel injection nozzle and in a position between the ports:
- wherein the cylinder head at least partially defines a water jacket at least partially surrounding the four ports and the at least one fuel injection nozzle, and the at least one cooling water piper is arranged inside the water jacket and the cooling water pipe comprises one section extending from one side of the cylinder head to a position near the fuel injection nozzle through a position between two ports among the four ports, and another section extending from another side of the cylinder head to a position near the fuel injection nozzle through a position between another two ports among the four ports,
- the one section has one inlet opening for introducing cooling water at its end located in the one side of the cylinder head, and has one first outlet opening for discharging the cooling water to the position around the fuel injection nozzle and one second outlet opening for discharging the cooling water to the position between the ports at its end located near the fuel injection nozzle, and
- the another section has another inlet opening for introducing the cooling water at its end located in the another side of the cylinder head, and has another first outlet opening for discharging the cooling water to the position around the fuel injection nozzle and another second outlet opening for discharging the cooling water to the position between the ports at its end located near the fuel injection nozzle.
Dependencies are inferred from the claim text.