Automobile fuel tank

Abstract

The invention discloses an automobile fuel tank which is low in cost. An upper tank body and a lower tank body are connected firmly and stably. The occupied vehicle interior space is small after a fuel pump and a turning-over valve are installed. The fuel tank comprises the upper tank body and the lower tank body arranged on the lower side of the upper tank body. The upper tank body and the lower tank body are made of metal materials respectively. An upper tank-closing ring edge is arranged on the portion, along the edge of the lower side, of the upper tank body. A lower tank-closing ring edge is arranged on the portion, along the edge of the upper side, of the upper tank body. The upper tank-closing ring edge and the lower tank-closing ring edge are matched and welded together in a rolling mode. The upper tank body is a concave casing with the front end and the rear end being protruding faces and the middle portion being a sunken face. The sunken face of the upper tank body is provided with a fuel pump installing flange and a turning-over valve installing flange. The upper tank body is further provided with an oil filling pipe and a ventilation pipe. The cost of the fuel tank is far smaller than that of a plastic fuel tank. The upper tank body and the lower tank body are connected firmly and stably, and influence of vibration is small; due to the sunken face, the tail portion of the installed fuel pump and the tail portion of the turning-over valve are prevented from protruding or protruding excessively.

Description

technical field [0001] The invention belongs to the field of automobile fuel systems, and in particular relates to an automobile fuel tank. Background technique [0002] The automobile fuel tank is a device for storing fuel in the automobile and is an important part of the automobile fuel system. Traditional plastic fuel tanks are popular in the world's automobile industry due to their light weight, strong anti-corrosion ability, easy shape, high safety, and long service life. However, the manufacturing cost of plastic fuel tanks is high, and it is difficult to meet the requirements of zero penetration of the fuel system promulgated by California, and plastic fuel tanks are more harmful to the environment during the raw material manufacturing process and waste disposal process. [0003] With the improvement of sheet metal forming technology and metal surface anti-corrosion treatment technology, the manufacturing technology of metal fuel tanks is also improving. More and mor...

AI Technical Summary

Problems solved by technology

However, in order to supplement the space at the fuel pump with air and make the fuel discharge smoothly, the existing metal fuel tanks have a full structure; however, when the fuel pump and the dump valve are installed on the fuel tank, the fuel pump and the The dump valve protrudes from the surface of the fuel tank, which not only takes up space in the car, but also makes the fuel pump and the dump valve easy to vibrate and unstable

In addition, the metal fuel tank is generally mainly composed of the upper tank and the lower tank. When the motor drive, fuel pump, dump valve and other hydraulic components are installed on the fuel tank, the upper and lower parts of the fuel tank will be shaken due to vibration. It leads to stress dispersion and high local stress at the connection, which leads to fatigue cracks at the connection between the upper tank and the lower tank, and the cracks spread to the surroundings, making the connection between the upper and lower parts of the tank unstable, and finally weakening the sealing of the fuel tank

Images