Gasket for fuel injector of internal combustion engine

Abstract

The invention discloses an oil injector sealing gasket of an internal combustion engine. One to three ring-shaped bulges are formed on the lower surface of the oil injector sealing gasket; the lower surface of the oil injector sealing gasket is in contact with a gas cylinder cover; one to three ring-shaped grooves are formed in the plane of the gas cylinder cover, and mutually matched with the ring-shaped bulges on the oil injector sealing gasket; the upper surface of the oil injector sealing gasket is arch-shaped and in contact with an oil injector. The oil injector sealing gasket has the advantages of being simple in structure and convenient to machine; the sealing effect and the reliability are excellent; the oil injector has a positioning function, so that the assembly and work reliability can be guaranteed.

Description

technical field [0001] The invention belongs to a component inside an internal combustion engine, in particular to a sealing gasket of an internal combustion engine fuel injector. Background technique [0002] As one of the core components of the fuel supply system of the internal combustion engine, the fuel injector is directly installed on the cylinder head to provide fuel injection for the cylinder. When the internal combustion engine is working, the combustion of fuel in the cylinder produces high-pressure gas up to 600°C and a maximum of 18MPa. The sealing between the injector and the cylinder head is guaranteed by a fuel injector gasket, and the working reliability of the gasket directly affects the working performance and reliability of the whole machine. [0003] The existing gasket structure is generally a ring structure, such as figure 1 , the material is generally copper material with a thickness of 1 to 5mm, and there is a little compression. The upper and lower...

AI Technical Summary

Problems solved by technology

[0004] 1. The inner hole of the fuel injector gasket is generally 1-2mm larger than the diameter of the fuel injector. There is a certain radial gap between the fuel injector and the inner hole of the fuel injector gasket. The center of the injector is not centered, which may easily cause uneven sealing pressure in the circumferential direction of the injector gasket, and there is a risk of gas leakage

Especially in the secondary assembly, it is difficult to ensure complete alignment with the original sealing surface, and the sealing risk is further increased

[0005] 2. Since the upper and lower ends of the fuel injector gasket are plane structures, the sealing plane structure is easy to enter soot particles and other impurities when the internal combustion engine works for a long time, or when the pressure of the fuel injector is insufficient due to engine vibration and other reasons, The flat sealing effect is easy to fail, the engine power decreases, the fuel consumption increases, and the maintenance cost increases

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