Auxiliary support and high-pressure plastic fuel tank provided with same
By designing an auxiliary bracket with a hollow polyhedral structure and laying it in an area where the high-pressure plastic fuel tank has no reinforced structure, the problem of high-pressure deformation and fuel shaking noise is solved, and the effect of improving the fuel tank stiffness and reducing noise is achieved.
Patent Information
- Application Number
- CN202421466476.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-06-25
AI Technical Summary
After long-term sealing, high-pressure plastic fuel tanks may be deformed due to increased internal pressure, and the fuel shaking and noise problems are serious, and the prior art is difficult to effectively solve these problems.
An auxiliary bracket is designed, adopting a hollow polyhedral structure, with reinforcement ribs and fixed connections, connected to the surface of the fuel tank, strengthening the strength of the bracket itself, and fixed to the oil tank wall through a specific connection method, and is arranged in an area where no reinforcement structure is installed to improve the rigidity of the fuel tank and act as a waveproof board on the surface of the fuel tank.
Through the design of the auxiliary bracket, the strength of the fuel tank under high pressure is effectively improved, deformation is reduced, and noise is significantly reduced by preventing fuel shaking.
Smart Images
Figure CN222891893U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to an auxiliary bracket for strengthening a fuel tank structure and reducing fuel sloshing noise. The bracket is connected to a plastic high-pressure fuel tank and belongs to the technical field of fuel systems. Background Art
[0002] When the high-pressure plastic fuel tank of a hybrid vehicle is sealed for a long time (not using fuel, only using electricity), the internal pressure will continue to increase with the temperature. According to the working capacity of the isolation valve, the pressure can reach more than 30kPa. At this time, the deformation problem of the fuel tank is particularly obvious. However, from a safety perspective, the OEM has strict requirements on the deformation size. At present, the widely used anti-deformation strategy for plastic fuel tanks is to arrange the fuel tank with a built-in reinforcement structure (built-in pillars or kiss-off). However, considering the cost and the size of the internal space of the fuel tank, the built-in pillars or kiss-offs will be arranged in a limited and dispersed manner. At this time, the area without the built-in reinforcement structure is generally reinforced with the surface reinforcement ribs of the fuel tank, such as Figure 1 The reinforcement ribs are local parts of the fuel tank that form a specific shape structure according to the mold shape. Since the reinforcement ribs are still made of the same material and wall thickness as the fuel tank, their anti-deformation effect is limited.
[0003] In hybrid vehicles, the engine is not working in electric drive mode, and the noise generated by the engine is no longer there. At this time, the noise of oil sloshing inside the fuel tank or the noise of oil hitting the inner wall of the fuel tank will be very obvious. The OEM has strict requirements on the noise level, so the need to reduce the noise of high-pressure fuel tanks is particularly urgent. Summary of the invention
[0004] The present invention aims at the technical problems existing in the prior art and provides an auxiliary bracket. By arranging the auxiliary bracket in the area where the reinforcement structure or reinforcement member is not arranged on the fuel tank, the problem of insufficient strength and large deformation under high pressure in these positions of the fuel tank is solved. The auxiliary bracket also acts as a wave-breaking plate on the surface of the fuel tank, which can prevent the fuel from sloshing and reduce the noise generated.
[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: an auxiliary bracket, the auxiliary bracket includes a bracket body, the bracket body is set as a hollow polyhedron structure, the bracket body is provided with reinforcing ribs and fixed connectors, and is connected to the surface of the oil tank. The auxiliary bracket itself is provided with reinforcing ribs and other structures to increase its own strength.
[0006] As an improvement of the present invention, the fixed connection member is configured as one or more of pits, through holes, slots, and grooves. The connection and limiting methods of the auxiliary bracket and the oil tank wall include but are not limited to: 1. melting and bonding with the oil tank wall through the pits, 2. connecting and limiting through the through holes set by the auxiliary bracket through the oil tank wall, 3. structural limiting of the groove of the bracket and the protrusion of the oil tank wall, 4. The slot structure of the bracket wraps the oil tank wall for structural connection and limiting.
[0007] As an improvement of the utility model, the bracket body is embedded in the fuel tank. Except for the cross section parallel to the fuel tank, the other surfaces of the bracket body are connected and fixed to the fuel tank. The bracket body is in a straight line or arc shape, or a combination of a straight line and an arc. It is set according to actual needs. The auxiliary bracket can be connected to the reinforcement structure or reinforcement member in a straight line connection, an arc connection or other various directions. Different connection trends can enhance different areas and areas of the fuel tank.
[0008] As an improvement of the present utility model, the auxiliary support material can be a single thermoplastic or thermosetting high-strength engineering plastic, such as PE, POM, PA, etc.; or a mixed material, such as HDPE+GF30, etc.; or a composite reinforced material. When it is composed of multiple materials, the multiple materials are cross-arranged internally and / or the multiple materials are bonded, welded, and encapsulated and / or the multiple material structures are assembled with each other and / or the multiple material structures are wrapped with each other and / or the connecting surfaces of multiple materials are connected with each other after chemical reaction.
[0009] A high-pressure plastic fuel tank provided with an auxiliary bracket, the fuel tank comprising a tank body, an auxiliary bracket provided on the tank body, and at least one auxiliary bracket. The auxiliary bracket is arranged at a position away from a reinforcement structure of the fuel tank and / or between two reinforcement structures. (Generally arranged in an area with relatively large deformation, and no reinforcement structure is provided in the area, so that the entire fuel tank is not easily deformed.)
[0010] Compared with the prior art, the present invention has the following advantages. The present application proposes a high-pressure plastic fuel tank with an auxiliary bracket. The auxiliary bracket itself is provided with a structure and adopts high-strength materials to improve its own strength. The bracket is effectively connected to the tank wall through the structure. The bracket is arranged between the built-in reinforcement structure or reinforcement member, or arranged at a position far away from the reinforcement structure or reinforcement member to improve the rigidity of the fuel tank. The bracket is connected to the reinforcement structure or reinforcement member in various ways to achieve the purpose of strengthening different fuel tank positions. The bracket is perpendicular or nearly perpendicular to the direction of movement of the car, and its depth is lower than the liquid level, which prevents or alleviates fuel sloshing and reduces noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the overall structure of the plastic fuel tank of this application;
[0012] Figure 2 — Figure 6 Schematic diagram of the overall structure of plastic fuel tanks with different structures;
[0013] Figure 7 , Figure 8 is a schematic diagram of the auxiliary support structure;
[0014] Fig. 9 , Fig.10 It is a schematic diagram of another embodiment of a plastic fuel tank.
[0015] In the figure: 1. auxiliary bracket, 2. box body, 3. fuel tank reinforcement frame structure, 4. outer surface of the fuel tank, 5. fuel tank KISS-OFF structure, 6. built-in column, 7. reinforcing ribs, 8. pitting, 9. through hole, 10. groove, 11. slot, 12. bracket body, 13. oil level, 14. auxiliary bracket depth is lower than the oil level, 15. inner surface of the fuel tank. DETAILED DESCRIPTION
[0016] In order to deepen the understanding of the present invention, the present embodiment is described in detail below with reference to the accompanying drawings.
[0017] Example 1: See Figure 7 , Figure 8 , an auxiliary bracket, the auxiliary bracket 1 includes a bracket body 12, the bracket body is set as a hollow polyhedron structure, the bracket body is provided with reinforcing ribs 7 and fixed connectors, and is connected to the surface of the fuel tank. The auxiliary bracket itself is provided with reinforcing ribs and other structures to increase its own strength, the fixed connector is used to be fixedly connected to the fuel tank body, the fixed connector is set as one or more of pits 8, through holes 9, slots 11, and grooves 10. The connection and limiting methods of the auxiliary bracket and the fuel tank wall are as follows: 1. Bonding with the fuel tank wall through pit melting, 2. Connection and limiting through the fuel tank wall passing through the through holes set in the auxiliary bracket, 3. The grooves of the bracket and the protrusions of the fuel tank wall are limited by structure, 4. The slot structure of the bracket wraps the fuel tank wall for structural connection and limiting. One or more combinations of the above methods can be used. Example 2: See ... Figure 7 , Figure 8As an improvement of the utility model, the bracket body is embedded in the fuel tank. Except for the cross section parallel to the fuel tank, the other surfaces of the bracket body are connected and fixed to the fuel tank. The bracket body is in a straight line or arc shape or S shape or a combination of a straight line and an arc. It is set according to actual needs. The auxiliary bracket connection reinforcement structure or reinforcement member can be connected in a straight line or an arc connection or in various other ways. Different connection trends can strengthen different areas and areas of the fuel tank. The auxiliary support material can be a single thermoplastic or thermosetting high-strength engineering plastic, such as PE, POM, PA, etc.; or a mixed material, such as HDPE+GF30, etc.; or a composite reinforced material. When it is composed of multiple materials, the structures of the multiple materials are cross-arranged with each other and / or the multiple materials are bonded, welded, and encapsulated and / or the structures of the multiple materials are assembled with each other and / or the structures of the multiple materials are wrapped with each other and / or the connecting surfaces of the multiple materials are connected with each other after chemical reaction.
[0018] Example 3: See Figure 1 A high-pressure plastic fuel tank with an auxiliary bracket is provided. The fuel tank includes a box 2, and an auxiliary bracket 1 is provided on the box body. The number of the auxiliary bracket is at least one. The auxiliary bracket is arranged at a position away from the reinforcement structure of the fuel tank and / or between two reinforcement structures. (Generally arranged in an area with relatively large deformation, and no reinforcement structure is provided in this area, so that the entire fuel tank is not easy to deform.
[0019] Figure 1 It is a high-pressure plastic fuel tank with an auxiliary bracket. The auxiliary bracket 1 is arranged at a position far away from the fuel tank reinforcement structure or reinforcement member, generally arranged in an area with large deformation. Another auxiliary bracket 1 is arranged between two reinforcement structures 3, connecting the two so that the stiffness of the entire area is increased.
[0020] The reinforcement structure or reinforcement member can be a combination of two or more built-in columns, or a combination of two or more kiss-offs, or a combination of two or more built-in columns and kiss-offs. The auxiliary bracket is arranged between these combinations, such as Figure 2-4 .
[0021] The auxiliary bracket can be connected to the reinforcement structure or reinforcement member in a straight line, an arc or other various ways. Different connection directions can enhance different areas and areas of the fuel tank, such as Figure 5-6 .
[0022] When the auxiliary bracket is arranged on the fuel tank in a direction perpendicular or nearly perpendicular to the direction of the vehicle's movement, it can effectively prevent or alleviate the sloshing of the oil. When the auxiliary bracket is arranged at a depth lower than the maximum height of the oil on the surface of the fuel tank, the effect of reducing sloshing noise is most obvious. Figure 9-10 .
[0023] It should be noted that the above embodiments are not intended to limit the protection scope of the present invention, and equivalent changes or substitutions made on the basis of the above technical solutions all fall within the protection scope of the claims of the present invention.
Claims
1. An auxiliary bracket, characterized in that: The auxiliary bracket comprises a bracket body, which is arranged as a hollow polyhedron structure. The bracket body is provided with reinforcing ribs and fixing connectors and is connected to the surface of the oil tank.
2. The auxiliary bracket according to claim 1, characterized in that: The fixed connection member is configured as one or more of pits, through holes, slots, and grooves.
3. The auxiliary bracket according to claim 1, characterized in that: The bracket body is embedded in the fuel tank.
4. The auxiliary bracket according to claim 1, characterized in that: The support body is in a straight line or arc shape, or a combination of a straight line and an arc shape.
5. A high-pressure plastic fuel tank provided with an auxiliary bracket, characterized in that: The fuel tank comprises a tank body, on which the auxiliary bracket according to any one of claims 1 to 4 is arranged, and the number of the auxiliary bracket is at least one.
6. The high-pressure plastic fuel tank provided with an auxiliary bracket according to claim 5, characterized in that: The auxiliary bracket is arranged at a position far away from the fuel tank reinforcement structure and / or between two reinforcement structures.