EFI filter

Abstract

The invention discloses an electric spraying filter. An oil inlet pipe and an oil outlet pipe are arranged on a filter shell; a filter element is fixed in the filter shell between the oil inlet pipe and the oil outlet pipe through upper and lower filter element end covers; a center pipe is fixed in the filter element between the upper and lower filter element end cover; an upper electric conducting rod and a lower electric conducting rod are respectively inserted from the oil inlet pipe and the oil outlet pipe; the upper electric conducting rod is contacted with the center pipe; the center pipe is connected with the lower filter element end cover; the lower filter element end cover is connected with the lower electric conducting rod; and the upper electric conducting rod and the lower electric conducting rod form an electric conducting circuit through the center pipe and the lower filter element end cover. The filter is simple in structure and low in manufacturing cost, and reliably guarantees outputting of electrostatic charges to prevent accidents caused by aggregation of the charges.

Description

Technical field [0001] The invention relates to an automobile filter, in particular to a swirling electric fuel injection gasoline filter with a conductive structure. Background technique [0002] Friction electrification is a ubiquitous physical phenomenon, which also occurs in the fuel system. The ionizable impurities and other ions in the fuel carry positive and negative charges. Pipe materials have different affinities for positive and negative charges. Those with higher affinity are attracted and adsorbed by the inner wall of the pipe. When the fuel is in a static state, the positive and negative ions form an even layer (the amount of charge is equal), which gathers near the interface between the pipe and the pipe, and clings to the solid surface (inner layer). The ions are called the fixed layer; the outer layer is The movable layer is called the active layer or diffusion layer. When the fuel flows, the pairs of ions are separated, and the charged particles of the diffusi...

AI Technical Summary

Problems solved by technology

For the filter, the diameter of the filter part of the filter is much larger than the diameter of its inlet and outlet parts, the speed of the fuel in the filter changes greatly, and due to the influence of the structure, the internal collision of the fuel will occur, and at the same time The contact area between the fuel and the outside increases, which will cause a sharp separation of charges. The opposite charges of the fixed layer accumulate inside the filter. If the material of the filter is not conductive and cannot dissipate the charges in time, the left opposite charges will generate an electric field If the potential difference that exceeds the potential difference that the substance where the charge accumulates can withstand, it will be broken down and spark discharge will occur, resulting in accidental combustion of fuel

[0005] At present, most EFI gasoline filter housings are made of metal materials such as steel and aluminum, and very few high-end cars use conductive plastic housings. Due to strict control over the price of conductive plastics and the composition of conductive materials, the price is relatively expensive

Although the filter with a metal shell is relatively cheap, the mold investment cost is large, the manufacturing process is relatively complicated, and the weight is heavier than plastic

In addition, the traditional plastic shell EFI gasoline filter structure, such as figure 1 The gasoline flow direction shown, when entering the filter, part of the fuel is directly sprayed to the end cover, returning to the backflow, causing turbulent flow and increasing pressure loss

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