Fuel filter assembly

Abstract

The invention discloses a fuel filter assembly. A filter element assembly is inserted in a shell, an upper end cover and a lower end cover are arranged at the upper end and the lower end of a filter layer of the filter element assembly, the periphery of a central pipe is sleeved with the filter layer, an oil purifying cavity is formed in the center of the central pipe, a framework part of the central pipe comprises a plurality of vertical beams and a plurality of fins, the fins incline downwards from inside to outside in the radial direction, and drainage through grooves are formed in the fins. The framework part of the filter element assembly is provided with the plurality of vertical beams and the plurality of fins, so that enough drainage channel space is ensured while the supporting effect is met, and separated water can be discharged downwards. The fins play a role in guiding the separated water, and therefore the separated water can completely flow into a water collecting cavity, and the water separation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of fuel filters for vehicles, in particular to a fuel filter assembly. Background technique [0002] The fuel filter is connected in series in the engine fuel system, and is used to filter out impurities and water in the fuel, and then provide clean fuel to the fuel delivery pump and high-pressure common rail system, so as to prevent impurities and water from wearing and corroding precision components in the engine fuel system , to make sure the engine is working properly. [0003] The existing fuel filter with a hand pump has the following problems: [0004] (1) The water in the central tube of the filter element assembly is not completely discharged, which affects the water separation efficiency. The draft tube is usually sealed with a seal, the sealing structure is relatively complicated, and the product cost is relatively high. [0005] (2) The seat and base of the check valve are usually snap-fitted ...

AI Technical Summary

Problems solved by technology

[0004] (1) The water in the central tube of the filter element assembly is not completely discharged, which affects the water separation efficiency

The guide tube is usually sealed with a seal, the sealing structure is relatively complicated, and the product cost is relatively high

[0005] (2) The seat and base of the check valve are usually snap-fitted and sealed with seals. The matching structure between the seat and the base is relatively complicated, and the cost of mold opening and product cost are relatively high

[0006] (3) During the air tightness inspection process, non-leakage air bubbles are prone to appear between the shell and the base, and between the shell and the water collection cup, resulting in misjudgment of the water test

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