A fuel tank with a structure to reduce fuel sloshing noise

Abstract

This invention relates to a fuel tank with a structure for reducing fuel sloshing noise. The fuel tank includes a tank body, and at least one noise-reducing component is provided within the tank body. The noise-reducing component includes a connecting structure and a functional structure. The connecting structure is fixed to the lower surface of the inner wall of the fuel tank, and the functional component faces the direction of liquid movement. This noise-reducing structure can be reasonably adjusted and arranged according to the direction of fuel movement and the liquid level at which noise occurs, thereby achieving better noise reduction.

Description

Technical Field

[0001] This invention relates to a fuel tank, specifically a fuel tank with a structure to reduce fuel sloshing noise, belonging to the technical field of fuel tank noise reduction structure components. Background Technology

[0002] In hybrid electric vehicles (plug-in hybrids, range-extended electric vehicles, etc.), the engine does not operate in electric drive mode, so it produces no noise. However, the noise from fuel sloshing within the fuel tank is more easily perceived. As people's demands for comfort increase, addressing the issue of fuel sloshing noise within the high-pressure fuel tank has become a key focus in fuel tank design.

[0003] Currently, there are two common solutions on the market. The first is to enhance the decoupling structure at the contact point between the fuel tank and the vehicle body. For example, adding shock-absorbing pads between the fuel tank and the vehicle floor, as well as between the fuel tank straps and the fixed crossbeams, blocks noise in the noise propagation path using decoupling components like shock-absorbing pads. The second is to add a baffle inside the fuel tank to block violent sloshing of the oil, thereby reducing noise at the source of the noise. Summary of the Invention

[0004] This invention addresses the technical problems existing in the prior art by providing a fuel tank with a structure to reduce fuel sloshing noise. The technical solution is ingeniously designed and compact in structure. The solution arranges a noise reduction component in a suitable position inside the fuel tank. One side of the component is connected to the fuel tank, and the other side adopts a honeycomb structure or is equipped with energy-absorbing material and faces the direction of liquid level movement. The honeycomb structure disperses the waves of the fuel or the energy-absorbing material absorbs the wave energy to achieve the noise reduction effect.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a fuel tank with a structure for reducing fuel sloshing noise. The fuel tank includes a fuel tank body, and at least one noise-reducing component is provided inside the fuel tank body. The noise-reducing component includes a connecting structure and a functional structure. The connecting structure is fixed to the lower surface of the inner wall of the fuel tank, and the orientation of the functional component is arranged according to the direction of liquid movement, preferably with the functional component facing the direction of liquid movement. This component can effectively disperse and absorb fuel sloshing energy, thereby reducing fuel sloshing noise.

[0006] As an improvement of the present invention, the functional structure is set as a snap-on or baffle assembly structure to wrap / fix / adhere a material block, the material block being a fluororubber sponge (FKM sponge) or a neoprene sponge (CR sponge); this material block is fuel-resistant and can buffer / absorb the energy of oil movement, such as using fluororubber sponge (FKM sponge) or neoprene sponge (CR sponge).

[0007] As an improvement of the present invention, the functional structure is configured such that the functional surface is a hexagonal honeycomb structure with a side length of 8-20mm. This structure can break up the waves of oil movement and reduce its impact energy.

[0008] As an improvement of the present invention, the connection structure is configured as a welding / riveting structure, which is fixed to the inner wall of the oil tank by setting a pitted structure, or by a connection groove structure that is welded to the inside of the oil tank and then assembled with the support, or by a buckle structure that is assembled with the opening of the oil tank after drilling holes.

[0009] As an improvement of this invention, the noise reduction component is arranged near the stepped structure with shape changes on the upper surface of the fuel tank. When the fuel level in the tank is low, the fuel sloshing noise mainly comes from the fuel moving and hitting the fuel tank surface below the step. At this time, arranging a noise reduction structure below the step will effectively reduce the noise of the fuel hitting the inner wall. When the fuel level in the tank is high, the fuel sloshing noise mainly comes from the fuel hitting the side and top of the step, so the noise reduction structure also needs to be arranged in the corresponding position.

[0010] As an improvement of the present invention, the orientation angle α of the functional surface of the noise reduction structure is adjusted according to the actual movement direction of the oil in the tank. α is set to 0-90° so that the functional surface is perpendicular to it, thereby achieving the purpose of optimal buffering or absorbing oil waves. This includes, but is not limited to, the following three orientations. The height H of the connecting structure determines the position of the functional structure relative to the inner surface of the tank. It can be adjusted according to the liquid level height where the noise problem is severe. By adjusting H, the functional surface is made as close as possible to the liquid level where the problem is severe.

[0011] Compared with the prior art, the present invention has the following advantages: 1) The present invention proposes a fuel tank with a noise reduction structure. The noise reduction principle of the structure is to disperse the moving oil through honeycomb or to absorb the moving oil through the material. The noise reduction structure can effectively reduce the noise generated by the oil hitting the upper surface of the fuel tank by absorbing the energy of the oil through the material. 2) The noise reduction structure can be reasonably adjusted and arranged according to the direction of oil movement and the liquid level height where the noise occurs, so as to achieve the purpose of better noise reduction. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 , 3 Two design diagrams for the functional structure are shown;

[0014] Figure 4-6 Three design diagrams for the connection structure;

[0015] Figure 7 This is a schematic diagram showing the orientation of the noise reduction structure.

[0016] Figure 8 , 9 A diagram showing the location of the noise reduction components;

[0017] In the diagram: 1. Noise reduction component, 2. Connection structure, 3. Functional structure, 4. Assembly structure, 5. Material block, 6. Snap-fit ​​structure, 7. Honeycomb structure, 8. Inner wall of the tank, 9. Welded support, 10. Slot structure, 11. Outer welded cover plate, 12. Rivet, 13. Opening surface of the tank, 14. Upper side of the step, 15. Side of the step, 16. Lower side of the step, 17. High liquid level, 18. Low liquid level. Detailed implementation method:

[0018] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0019] Example 1: See Figure 1 A fuel tank with a structure to reduce fuel sloshing noise. The fuel tank includes a fuel tank body, and at least one noise reduction component 1 for reducing noise is provided inside the fuel tank body. The noise reduction component includes a connecting structure 2 and a functional structure 3. The connecting structure is fixed to the lower surface of the inner wall 8 of the fuel tank, and the functional component faces the direction of liquid movement.

[0020] See Figure 2 , Figure 3 In this scheme, the functional structure is set as a snap-on or baffle assembly structure to wrap / fix / adhere the material block 5. The material block 5 is a fluororubber sponge (FKM sponge) or a neoprene sponge (CR sponge). This material block is fuel-resistant and can buffer / absorb the energy of oil movement. For example, fluororubber sponge (FKM sponge) or neoprene sponge (CR sponge) can be selected.

[0021] Functional structure 3 is configured with a hexagonal honeycomb structure with a side length of 8-20mm. This structure can break up the waves of oil movement and reduce its impact energy.

[0022] See Figures 4-6 The connection structure 2 is configured as a welding / riveting structure, which is fixed to the inner wall of the oil tank by setting a pitted structure, or by a connection groove structure that is then assembled with a welded support inside the oil tank, or by a snap-fit ​​structure that is assembled with the opening of the oil tank after drilling holes.

[0023] See Figure 8 , 9 The noise reduction components are positioned near the stepped structure on the upper surface of the fuel tank where the shape changes. For example... Figure 8When the fuel level in the tank is low (18), the fuel sloshing noise mainly comes from the fuel moving and hitting the tank surface on the lower side (16) of the step. Placing a noise reduction structure on the lower side of the step will effectively reduce the noise from the fuel hitting the inner wall. When the fuel level is high (17), the fuel sloshing noise mainly comes from the fuel hitting the side (15) and upper side (14) of the step, so noise reduction structures also need to be placed in the corresponding positions.

[0024] See Figure 7 The orientation angle 'a' of the functional surface of the noise reduction structure is adjusted according to the actual movement direction of the oil in the tank. 'a' is set to 0-90° to make the functional surface perpendicular to it, thereby achieving the best purpose of buffering or absorbing oil waves. This includes, but is not limited to, the following three orientations. The height H of the connecting structure determines the position of the functional structure relative to the inner surface of the tank. It can be adjusted according to the liquid level height where the noise problem is severe. By adjusting H, the functional surface can be made as close as possible to the liquid level where the problem is severe.

[0025] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A fuel tank with a structure for reducing fuel sloshing noise, characterized in that, The fuel tank includes a fuel tank body, and at least one noise reduction component for reducing noise is provided inside the fuel tank body. The noise reduction component includes a connecting structure and a functional structure. The connecting structure is fixed to the lower surface of the inner wall of the fuel tank, and the orientation of the functional component is arranged according to the direction of liquid movement.

2. A fuel tank with a structure for reducing fuel sloshing noise according to claim 1, characterized in that, The functional structure is set as a snap-on or baffle assembly structure to wrap, fix or stick to the material block, which is fluororubber sponge or neoprene sponge.

3. A fuel tank with a structure for reducing fuel sloshing noise according to claim 1, characterized in that, The functional structure is set to a hexagonal honeycomb structure with a side length of 8-20mm for the functional surface.

4. A fuel tank with a structure for reducing fuel sloshing noise according to claim 2 or 3, characterized in that, The connection structure is configured as a welding / riveting structure, or a connection groove structure with a built-in welded support in the fuel tank and then assembled with the support, or a snap-fit ​​structure with the fuel tank opening after drilling holes in the fuel tank.

5. A fuel tank with a structure for reducing fuel sloshing noise according to claim 1, characterized in that, The noise reduction components are positioned near the stepped structure on the upper surface of the fuel tank where the shape changes.

6. A fuel tank with a structure for reducing fuel sloshing noise according to claim 1 or 3, characterized in that, The functional surface of the noise reduction structure is oriented at an angle 'a' according to the actual direction of oil movement in the tank, and 'a' is set to 0-90°.

7. A fuel tank with a structure for reducing fuel sloshing noise according to claim 1 or 3, characterized in that, The functional components are facing the direction of liquid movement.

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