Manufacturing method of fuel injector penetrating cylinder sealing structure

The utility model discloses a cylinder penetrating sealing structure of a fuel injector, which relates to the technical field of fuel injectors of engines. The structure includes a fuel injector connector, a high-pressure fuel pipe nut, a high-pressure fuel pipe, and a cylinder head cover. The fuel injector connector penetrates the cylinder head cover wall and is connected to one end of the high-pressure fuel pipe. The high-pressure fuel pipe nut is sleeved on the fuel injector. Where the outer wall of the high-pressure oil pipe nut is connected to the cylinder head cover, the outer wall of the injector connector is provided with an annular groove, a sealing ring is arranged in the annular groove, and the high-pressure oil pipe An inner ring light hole adapted to the outer wall of the injector connector is arranged in the nut. In the utility model, the inner ring light hole and the sealing ring on the injector joint play a sealing role, and prevent the oil and gas inside the cylinder head cover from leaking through the threaded gap between the high-pressure oil pipe nut and the injector joint. This kind of sealing structure is simple, easy to assemble, and high sealing reliability

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