Manufacturing method of oiler through-cylinder sealing structure

1. The utility model relates to the technical field of fuel injectors of engines, in particular to a cylinder penetrating seal structure of the fuel injector.

Background technique:

2. The fuel injector of the engine is generally installed outside or inside the cylinder head cover. For the engine with the injector arranged inside the cylinder head cover, when the high-pressure fuel pipe is directly connected to the injector joint, it is necessary to design the sealing structure of the injector (or high-pressure fuel pipe) penetrating the cylinder head cover to ensure the cylinder The oil and gas inside the cover will not leak out.

3. At present, the traditional high-pressure oil pipe is directly connected to the injector joint. This arrangement has the problem that the oil and gas inside the cylinder head cover will leak through the threaded gap between the high-pressure oil pipe nut and the injector joint. Moreover, if sealant is applied to the thread of the high-pressure oil pipe nut or the injector joint to block the thread gap, the efficiency of applying the sealant is low, the process requirements are high, and the consistency of the application is difficult to control. At the same time, there is a risk that excess residual glue will fall into the cylinder head cover and block the engine oil passage.

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