Embedded oil inlet-return injector assembly of diesel engine cylinder cover

Abstract

The invention relates to an embedded oil inlet-return injector assembly of a diesel engine cylinder cover. The embedded oil inlet-return injector assembly consists of an oil injector (3), a high pressure oil receiving pipe (2) and a washer (4), wherein an axial platform (P) is machined on the circumferential surface of a cylindrical platform on the upper section of the oil injector (3), a radial screw hole (M) which is arranged on the axial platform (P) is assembled with a spiral pipe head (L) on the front end of the high-pressure oil receiving pipe (2), the washer (4) is arranged on the junction of the radial screw hole (M), a three-way connector (10) and a three-way washer (11) are arranged on the rear end of the high-pressure oil receiving pipe (2), a connector nut (1) is sleeved on the rear end of a high-pressure oil receiving pipe (1) to be connected with an oil pipe, a sealing groove (C) is arranged on the cylindrical platform on the upper end of the three-way connector (10), a sealing ring (Q) is sleeved on the cylindrical platform on the upper end of the three-way connector (10), an oil return passage is arranged inside the three-way connector (10), and the sealing ring (Q) is embedded in the oil return passage. The embedded oil inlet-return injector assembly is simple in structure, convenient to install and good in matching performance and can be widely applied to a fuel injection system of a diesel engine.

Description

Technical field [0001] The invention involves the supporting components of diesel engines, especially the fuel injector. Background technique [0002] The injector is a key supporting part of the diesel engine. When installing and using it, it must be connected to the high -pressure oil, and fix the injector with a pressure block. The connection between the current injector and the high -pressure oil is mostly cone surface.Postering the back end to apply axial force for squeezing to play a combination of sealing. The injector block and the upper end of the injector are contacted and coordinated.High cone surface processing accuracy, high manufacturing costs, connecting vertical coordination with high -pressure oil, under the influence of radial force, the injector will tilt, resulting in sealing failure, leakage of high -pressure oil, spraying the fuel to the falling point of the combustion chamberIf you do not reach the set position, it will directly affect the performance of di...

AI Technical Summary

Problems solved by technology

[0002] The fuel injector is a key supporting part of the diesel engine. It should be connected with the high-pressure oil pipe when installing and using, and the fuel injector should be fixed with a pressure block. Axial force is applied to the rear end of the connecting pipe to squeeze, which plays a role of sealing and bonding. The fuel injector pressure block and the upper surface of the fuel injector are in line contact and fit, and the fuel injector is fixed by applying force in the axial direction. This connection method requires more High machining accuracy of the conical surface, high manufacturing cost, and vertical cooperation with the high-pressure oil nozzle, under the action of radial force, the injector will tilt, resulting in seal failure, high-pressure oil leakage, and fuel injection to the landing point of the combustion chamber Failure to reach the set position will directly affect the performance of the diesel engine

Severe high-pressure oil leaks can also dilute the lubricating oil and cause damage to the internal combustion engine

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