car electric fuel pump

Abstract

The invention discloses an electric fuel pump for an automobile. The electric fuel pump for the automobile comprises a pump case, a pump head component, a back cover component, an electric motor component installed inside the pump case, and a pump body component. The pump head component comprises a pump cover made of a plastic material, an anode insertion piece and a cathode insertion piece that are fixed on the pump cover. The anode insertion piece and the cathode insertion piece run through the upper end face and the lower end face of the pump cover, wherein a sealing ring is fixedly sleeved on the lower-half periphery of the connected portion among the anode insertion piece, the cathode insertion piece and the pump cover, with the lower end of the sealing ring being away from the lower end face of the pump cover by a certain distance. The anode insertion piece, the cathode insertion piece, the sealing ring and the pump cover are integrally injection molded. With the electric fuel pump for the automobile, the problem of leaking the fuel inside the fuel pump from the surfaces of the anode insertion piece and the cathode insertion piece can be thoroughly solved, thereby ensuring the safety of driving.

Description

【Technical field】 [0001] The invention relates to an improvement of an automobile electric fuel pump. 【Background technique】 [0002] The function of the automobile electric fuel pump is to deliver the fuel stored in the fuel tank to the fuel pipeline of the injector. There are two installation methods for automobile electric fuel pumps: built-in fuel tank and external fuel tank. For automobile electric fuel pumps with external fuel tanks, oil leakage prevention is a very critical technical issue. Although many solutions have been adopted, but It is unavoidable that when the vehicle is running normally, the pump cover made of plastic material will soften due to the increase of oil temperature. Leakage; In addition, when the vehicle is running for a long time, the fuel pipeline will be blocked and the pressure will increase, and the internal pressure of the fuel pump will increase instantaneously, which will also cause oil to leak from the surface of the insert. Although th...

AI Technical Summary

Problems solved by technology

There are two installation methods for automobile electric fuel pumps: built-in fuel tank and external fuel tank. For automobile electric fuel pumps with external fuel tanks, oil leakage prevention is a very critical technical issue. Although many solutions have been adopted, but It is unavoidable that when the vehicle is running normally, the pump cover made of plastic material will soften due to the increase of oil temperature. Leakage; In addition, when the vehicle is running for a long time, the fuel pipeline will be blocked and the pressure will increase, which will cause the internal pressure of the fuel pump to increase instantaneously and cause oil to leak from the surface of the insert

Although the above-mentioned oil leakage is small, it is extremely detrimental to driving safety

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