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Ventilation system of fuel tank

A ventilation system and fuel tank technology, applied in the direction of valves for ventilation, arrangement combined with internal combustion engine fuel supply, containers, etc., can solve problems such as limiting the freedom of ventilation fixed openings, restricting product development, increasing design difficulty, etc., to achieve The design requirements are simplified, the composition structure is simple, and the effect of increasing the degree of design freedom

Pending Publication Date: 2019-09-10
YAPP AUTOMOTIVE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As mentioned in the background technology above, the fixed port of the ventilation pipeline on the fuel tank needs to be close to the pump port, and generally cannot exceed the range of manual operation, which limits the degree of freedom in the selection of the vent fixed port during design, greatly increasing the design Difficulty, to a certain extent, limits product development
Those skilled in the art have been trying to solve the above problems, but the solutions in the prior art are not ideal

Method used

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  • Ventilation system of fuel tank
  • Ventilation system of fuel tank
  • Ventilation system of fuel tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: see Figure 1-Figure 6 , a fuel tank ventilation system, the ventilation system includes at least one fuel tank fixed interface structure 4 for ventilation fixed on the wall of the fuel tank, a quick-fit female joint 5 and an external male joint 6, the quick-fit female joint 5 is connected to the ventilation pipeline 2 inside the fuel tank 1 and plugged and fixed with the external male joint 6 welded or assembled on the fuel tank 1; the quick-fit female joint 5 is fixed on the inner wall of the fuel tank 1 through the protective cover 3; The welding piece 7 is welded to the fixed interface structure 4 of the fuel tank on the outer wall of the fuel tank to realize the sealing of the entire ventilation system. The protective cover 3 is composed of a welding pit structure at the cover body and the end, and the pits are arranged at end of the cover. The welding surface of the protection cover 3 of this solution is designed with a pitted structure, which is cl...

Embodiment 2

[0023] Example 2: see Figure 1-Figure 6 , as an improvement of the present invention, the cover body a has two openings b to ensure that the fuel is discharged from it in time; the pitted structure c at the end is used for the fuel tank to be welded to it during the blow molding process and to carry out Fixed; at the same time, the ventilation pipeline 2 drawn out from the protective cover 3 has a raised d structure in the tail area of ​​the cover body to prevent the external male connector 6 from being forced out of the protective cover 3 during the assembly process with the quick-connect female connector 5, Such as Figure 4 shown.

Embodiment 3

[0024] Embodiment 3: see Figure 1-Figure 6 , as an improvement of the present invention, the fixed interface structure 4 of the fuel tank is molded during the blow molding process of the fuel tank, and is a concave interface e, and the inner diameter of the fixed interface structure 4 is larger than the outer diameter of the matching joint. The supporting structure is externally connected with male joints 6, and the matching gap tolerance is designed within 0.1 mm. The fixed interface structure 4 of the fuel tank on the fuel tank 1 is formed during the blow molding of the tank body. This structure has a coupling structure that is copied from the external male joint 6. Welding to achieve fixation and sealing. The structure of the externally connected male joint is designed in conjunction with the quick-fit female joint. The outer diameter of the externally connected male joint and the boss f on it cooperate with the inner diameter of the female joint to ensure tightness; the m...

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Abstract

The invention relates to a ventilation system of a fuel tank. The ventilation system comprises at least one fuel tank fixing connector structure (4) which is fixed on the wall of the fuel tank, a quick-mounting female connector (5) and an external male connector (6). The quick-mounting female connector (5) is connected with a ventilation pipe line (2) inside the fuel tank (1) and is inserted and fixed with the external male connector (6) welded or assembled on the fuel tank (1); the quick-mounting female connector (5) is fixed on the inner wall of the fuel tank (1) through a protective cover (3); an external welding part (7) is welded with the fuel tank fixing connector structure (4) on the outer wall of the fuel tank, so that the sealing of the whole ventilation system is realized. According to the technical scheme, a ventilation fixing port is arranged at any effective area of the fuel tank and is not limited by the manual operation range of the pump port, so that the design difficulty of arranging the ventilation fixing port is reduced, and meanwhile, the convenience in assembling and detecting processes is also improved.

Description

technical field [0001] The invention relates to a ventilation structure, in particular to a fuel tank ventilation system, and belongs to the technical field of fuel tank structural components. Background technique [0002] Extrusion blow molding is a common molding method for plastic fuel tanks. One of them is the two-piece extrusion blow molding process. The two-piece extrusion blow molding process will extrude two pieces of blanks during molding. Blow air to preform the boxes on both sides, fix the built-in parts to the inner wall of the box, and finally close the two pieces of blanks to complete the blow molding. [0003] The fuel tank manufactured by the two-piece extrusion blow molding process can significantly reduce the permeation and emission of hydrocarbons. At the same time, it can also integrate different accessories previously arranged on the outer wall of the tank to complete welding at one time, improving production efficiency. For fuel tanks with built-in wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L37/244F16K24/04B60K15/035
CPCF16L37/244F16K24/04B60K15/035B60K2015/03528B60K2015/03542
Inventor 姜林刘亮吕昊朱仁清孙晗禹
Owner YAPP AUTOMOTIVE PARTS
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