Fuel tank

Abstract

The invention provides a fuel tank which comprises a barrel body (2) and an internal separator (1) positioned in the barrel body (2), wherein the internal separator (1) is provided with a main body part (8) and a connecting part (9), the periphery of the main body part (8) is bent to form the connecting part, and the barrel body (2) is fixedly connected with the connecting part (9) in a press-fitting manner. As the barrel body of the fuel tank provided by the invention is fixedly connected with the internal separator in the press-fitting manner, the internal separator can be firmly fixed on the barrel body, the phenomenon that the internal separator falls off in the use process of the fuel tank is avoided, the internal separator is guaranteed to powerfully support a fuel tank assembly, and the rigidity and strength of the fuel tank assembly are accordingly improved. The fuel tank assembly part with the structural characteristics, which undergoes a 12000 km real vehicle reliability test, indicates that the phenomena of deformation and cracking of the fuel tank, generated by the fuel tank assembly due to external force impact are effectively restrained, and the potential safety hazard is eliminated.

Description

technical field [0001] The invention relates to a fuel tank. Background technique [0002] In order to effectively reduce vehicle weight, improve fuel economy, and meet the requirements of the National IV engine common rail system for fuel quality and container cleanliness, aluminum alloy metal fuel tanks are increasingly used in trucks. [0003] The traditional aluminum alloy inner partition is fixed on the fuel tank barrel by welding. However, because the aluminum alloy material has the characteristics of good thermal conductivity, large heat capacity and linear expansion coefficient, low melting point and low high-temperature strength, it is affected by the ambient temperature, humidity and the welding level of the operator during welding. Defects such as material oxidation, porosity, and burn-through appear. Due to the existence of welding defects, the fuel tank is prone to the phenomenon of inner partition falling off during use, which seriously affects the rigidity a...

AI Technical Summary

Problems solved by technology

However, because the aluminum alloy material has the characteristics of good thermal conductivity, large heat capacity and linear expansion coefficient, low melting point and low high-temperature strength, it is affected by the ambient temperature, humidity and the welding level of the operator during welding. Defects such as material oxidation, pores, burn-through, etc.

Due to welding defects, the inner partition of the fuel tank is prone to fall off during use, which seriously affects the rigidity and strength of the aluminum alloy fuel tank assembly

Especially when the fuel tank assembly is impacted by an external force, because the fuel tank loses its internal support, it is very prone to failures such as deformation and cracking of the fuel tank, resulting in a great potential safety hazard

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