Gas injection valve with lubricating mechanism

Abstract

The invention relates to a gas injection valve, in particular to the gas injection valve with a lubricating mechanism. The gas injection valve comprises a valve body, a valve rod mounted in the valve body, a valve plate and a moving armature coaxial with the valve rod, and an electromagnetic coil, wherein the valve rod is of a columnar structure; a valve rod sleeve is arranged between the valve rod and the valve body and is fixedly connected with the valve body; an oil storage tank with an annular structure is arranged between the outer surface of the valve rod sleeve and the valve body; an oil way communicated with an inner cavity of the valve rod sleeve is arranged in the oil storage tank; an oil filling port communicated with the oil storage tank is formed in the valve body. The gas injection valve is of a double-valve gas inlet structure formed integrally, and the lubricating mechanism is arranged between the valve rod and the valve body; the valve rod is small in frictional resistance, long in service life, large in gas injection flow, high in response speed and easy to assemble.

Description

technical field [0001] The invention relates to a gas injection valve, in particular to a gas injection valve with a lubricating mechanism. Background technique [0002] Injection volume, response time, and life are important parameters to measure the quality of gas injection valves. Due to the low density of gas, the diameter of the valve required when the injection flow rate is large is also large, but the large gas working pressure acts on the gas injection valve. On the valve, it will hinder the opening and closing movement of the valve and restrict the response time. Therefore, high-speed electromagnetic gas injection valves driven by electromagnetics can generally only adapt to smaller flow requirements and lower gas pressure conditions, and cannot meet high-speed quantitative injection under larger flow and higher pressure requirements. [0003] The EGR valve produced by Delphi Company in the United States adopts balanced double valve intake, the diameters of the two...

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Problems solved by technology

[0005] Due to the moving parts in the valve stem, there is sliding friction between the valve stem and the valve body of the above-mentioned various gas injection valves. Due to the lack of a reasonable lubrication structure, the sliding friction between the valve stem and the valve body not only increases the The movement resistance prolongs the response time, and it is easy to cause excessive wear of the valve stem, which affects the service life

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