A canister vent atmospheric connection tube assembly and vehicle

Abstract

The present application relates to the technical field of vehicle fuel system, in particular to a carbon canister atmosphere connection pipe assembly and a vehicle. The carbon canister atmosphere connection pipe assembly comprises an inlet end connecting pipe, a stop valve and an outlet end connecting pipe. The inlet end connecting pipe comprises a first hose, a nylon pipe and a second hose connected in sequence, and the first hose is used for connecting with a fuel system breather pipe; the inlet pipe of the stop valve is connected with the second hose; and the outlet end connecting pipe is connected with the outlet pipe of the stop valve. The problems that the whole assembly needs to be replaced when the pipeline or connecting piece is damaged in the prior art, and the faulty components cannot be replaced alone, which significantly increases the maintenance cost of the vehicle owner, can be solved.

Description

Technical Field

[0001] This invention relates to the field of vehicle fuel system technology, specifically to a charcoal canister vent connection pipe assembly and a vehicle. Background Technology

[0002] The carbon canister is connected to the atmosphere via a breather. When the fuel vapor pressure in the fuel tank changes, it automatically adjusts the internal pressure to prevent the carbon canister from failing to properly adsorb or release vapor due to pressure imbalance. This maintains gas exchange between the carbon canister and the outside environment, preventing structural damage or malfunction caused by abnormal pressure and ensuring the long-term stable operation of the fuel evaporation control system.

[0003] The main function of the automotive carbon canister vent connection pipe assembly is to maintain the pressure balance between the inside of the carbon canister and the outside environment, preventing pressure differences from affecting the normal operation of the carbon canister.

[0004] In existing technology, the atmospheric connection pipe for automotive carbon canisters uses a single nylon tube with quick-connect fittings at the ends. When the pipe or connector is damaged due to external factors (such as collision, aging, or vibration fatigue), the entire assembly must be replaced, and the faulty component cannot be replaced individually. For example, if only one quick-connect fitting becomes loose and leaks air, a high-value assembly needs to be scrapped, significantly increasing the owner's repair costs. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a carbon canister vent connection pipe assembly and vehicle, which solves the problem that existing automotive carbon canister vent connection pipes use a single nylon tube with quick-connect fittings at the ends, resulting in the need to replace the entire assembly when the pipe or connector is damaged, rather than replacing the faulty component individually, which significantly increases the owner's maintenance costs.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: On one hand, this utility model provides a charcoal canister vent connection pipe assembly, comprising: The inlet end connecting pipe includes a first hose, a nylon tube, and a second hose connected in sequence, wherein the first hose is used to connect to the fuel system vent pipe; The shut-off valve has its inlet pipe connected to the second flexible hose; The outlet end connecting pipe is connected to the outlet pipe of the shut-off valve.

[0007] The first hose, nylon hose, and second hose are connected sequentially to form the inlet end connection pipe. If any of the first hose, nylon hose, or second hose is damaged by collision, aging, or vibration fatigue, the corresponding damaged hose can be replaced individually. This avoids the need to replace the entire inlet end connection pipe, thus avoiding the high cost of replacing integrated parts. Additionally, a shut-off valve is installed within the charcoal canister vent connection pipe assembly to control the flow of gas, providing pressure conditions for fuel tank system diagnostics. When it is necessary to maintain pressure in the fuel tank system for diagnostics, the shut-off valve is closed, allowing for pressure diagnostics of the fuel tank system.

[0008] In some alternative solutions, both ends of the nylon tube are provided with rigid plugs, and the ends of the first and second flexible tubes are sleeved on the outside of the rigid plugs and are interference-fitted with the rigid plugs.

[0009] Because the first and second hoses have a certain degree of elasticity, when the nylon tube is damaged by collision, aging, vibration fatigue, the first and second hoses can be pulled out from the rigid plugs at both ends of the nylon tube. After replacing the nylon tube, the first and second hoses can be connected to the rigid plugs at both ends of the nylon tube by interference fit. This ensures the stability of the connection and improves construction efficiency.

[0010] In some alternative embodiments, the rigid plug includes an outermost protruding section, a central binding section, and a connecting section that connects to the nylon tube. The outer contour of the binding section is cylindrical, and the maximum diameter of the protruding section is larger than the diameter of the binding section.

[0011] The outer contour of the binding section is cylindrical, which facilitates binding. Since the maximum diameter of the protruding section is larger than the diameter of the binding section, the stability of the connection between the first hose and the second hose and the nylon tube can be guaranteed.

[0012] In some alternative designs, the outermost contour of the protrusion is trumpet-shaped.

[0013] The outermost end of the protruding section has a trumpet-shaped outer contour, which makes it convenient to fit the first and second hoses onto the outside of the rigid plug.

[0014] In some alternative solutions, an annular stop is provided between the binding section and the connecting section.

[0015] When the first and second hoses are fitted onto the rigid plug, they will abut against the annular stop after being fully fitted onto the binding section. This prevents damage to the connection between the rigid plug and the nylon tube.

[0016] In some alternative solutions, the first and second hoses are fitted onto the outside of the binding section of the rigid plug, and a clamp is fitted on the outside.

[0017] The first and second hoses, which are fitted onto the outside of the binding section of the rigid plug, are further secured with clamps, which makes the connection between the first and second hoses and the rigid plug more secure.

[0018] In some alternative designs, the ends of the first and second hoses are marked with clamps.

[0019] Setting clamp markings at the ends clearly indicates the clamp's location and improves the accuracy of binding.

[0020] In some alternative embodiments, the shut-off valve includes a valve body and a mounting bracket connected thereto, the mounting bracket having two spaced-apart mounting holes, one of which is an elongated hole.

[0021] One of the mounting holes can be made into an oblong hole, which can be adapted to manufacturing tolerances and facilitates the installation of the gate valve.

[0022] In some alternative designs, both the inlet and outlet ends of the valve body are provided with protrusions.

[0023] On the other hand, this utility model also provides a vehicle including the charcoal canister atmospheric connection pipe assembly described in any of the above claims.

[0024] Compared with existing technologies, the advantages of this invention are as follows: In this solution, the first hose, nylon hose, and second hose are connected sequentially. The first hose is connected to the fuel system vent pipe, the inlet pipe of the shut-off valve is connected to the second hose, and the outlet end connection pipe is connected to the outlet pipe of the shut-off valve. When any of the first hose, nylon hose, or second hose is damaged by collision, aging, or vibration fatigue, the corresponding damaged first hose, nylon hose, or second hose can be replaced individually. There is no need to replace the entire inlet end connection pipe, avoiding the high cost of replacing integrated parts. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the charcoal canister vent connection pipe assembly in an embodiment of the present invention; Figure 2 This is a schematic diagram of the nylon tube structure in an embodiment of the present invention; Figure 3 This is a schematic diagram of the shut-off valve in an embodiment of the present invention; Figure 4This is a schematic diagram of the structure of the first flexible tube in an embodiment of the present invention; In the diagram: 1. Inlet connecting pipe; 11. First flexible hose; 12. Nylon hose; 13. Second flexible hose; 14. Rigid plug; 141. Protruding section; 142. Binding section; 143. Connecting section; 144. Annular stop block; 15. Clamp marking; 2. Gate valve; 21. Valve body; 22. Mounting bracket; 23. Mounting hole; 24. Protrusion; 25. Cylindrical section; 3. Outlet connecting pipe; 4. Clamp. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] In automotive fuel evaporation control systems, the charcoal canister atmospheric connection pipe assembly is a key component for achieving fuel vapor adsorption and emission. Its core function is to connect the charcoal canister to the atmosphere, ensuring fuel vapor emission and preventing environmental pollution. In existing technologies, such connection pipe assemblies generally adopt an integrated, monolithic structure design, leading to the following technical problems: high maintenance costs and difficulty in disassembly. When the pipes or connectors are damaged due to external factors (such as collisions, aging, vibration fatigue), the entire assembly must be replaced, making it impossible to replace the faulty component individually.

[0030] like Figure 1 As shown, based on the above problems, the utility model provides a charcoal canister vent connection pipe assembly, including: an inlet end connection pipe 1, a shut-off valve 2, and an outlet end connection pipe 3. The inlet end connection pipe 1 includes a first flexible hose 11, a nylon hose 12, and a second flexible hose 13 connected in sequence. The first flexible hose 11 is used to connect to the fuel system vent pipe; the inlet pipe of the shut-off valve 2 is connected to the second flexible hose 13; and the outlet end connection pipe 3 is connected to the outlet pipe of the shut-off valve 2.

[0031] When using this charcoal canister vent connection assembly, connect the first hose 11, nylon hose 12, and second hose 13 sequentially. Connect the first hose 11 to the fuel system vent pipe, i.e., to the charcoal canister assembly. Connect the inlet pipe of the shut-off valve 2 to the second hose 13, and connect the outlet end connection pipe 3 to the outlet pipe of the shut-off valve 2. If any of the first hose 11, nylon hose 12, or second hose 13 is damaged by collision, aging, or vibration fatigue, the corresponding damaged first hose 11, nylon hose 12, or second hose 13 can be replaced individually. There is no need to replace the entire inlet end connection pipe 1, avoiding the high cost of replacing integrated parts.

[0032] Additionally, a shut-off valve 2 is installed within the charcoal canister vent connection assembly to control the opening and closing of the gas inlet and outlet pipes, providing pressure conditions for fuel tank system diagnostics. When it is necessary to maintain pressure in the fuel tank system for diagnostics, shut-off valve 2 is closed to perform pressure diagnostics on the fuel tank system.

[0033] In addition, the two ends of the nylon tube 12 are connected by a first flexible hose 11 and a second flexible hose 13, which makes it easier to adjust the position and facilitates installation.

[0034] like Figure 2 As shown, in some optional embodiments, both ends of the nylon tube 12 are provided with rigid plugs 14, and the ends of the first flexible tube 11 and the second flexible tube 13 are sleeved on the outside of the rigid plugs 14 and are interference-fitted with the rigid plugs 14.

[0035] In this embodiment, rigid plugs 14 are provided at both ends of the nylon tube 12. Since the first flexible tube 11 and the second flexible tube 13 have a certain elasticity, when the nylon tube 12 is damaged by collision, aging, vibration fatigue, the first flexible tube 11 and the second flexible tube 13 can be pulled out from the rigid plugs 14 at both ends of the nylon tube 12. After replacing the nylon tube 12, the first flexible tube 11 and the second flexible tube 13 can be connected to the rigid plugs 14 at both ends of the nylon tube 12 by interference fit.

[0036] If the first hose 11 or the second hose 13 is damaged, simply remove the damaged first hose 11 or second hose 13 from the rigid plug 14 at the end of the nylon tube 12 and replace it. Alternatively, if the connection between the first hose 11 or second hose 13 and the rigid plug 14 is damaged, one end of the first hose 11 or second hose 13 can be cut off. If the length still meets the usage requirements, the cut first hose 11 or second hose 13 can continue to be used to save costs.

[0037] In some alternative embodiments, the rigid plug 14 includes an outermost protrusion 141, a middle binding section 142, and a connecting section 143 connected to the nylon tube 12. The outer contour of the binding section 142 is cylindrical, and the maximum diameter of the protrusion 141 is larger than the diameter of the binding section 142.

[0038] In this embodiment, the connecting section 143 is connected to the nylon tube 12. The end of the first hose 11 or the second hose 13 is sleeved on the outermost protruding section 141 and the binding section 142 located in the middle, and is bound on the binding section 142. The outer contour of the binding section 142 is cylindrical, which facilitates binding. Since the maximum diameter of the protruding section 141 is larger than the diameter of the binding section 142, the stability of the connection between the first hose 11 and the second hose 13 and the nylon tube 12 can be guaranteed.

[0039] In some alternative embodiments, the outermost contour of the protrusion 141 is trumpet-shaped.

[0040] In this embodiment, since the first flexible tube 11 and the second flexible tube 13 are connected to the rigid plug 14 by an interference fit, in order to facilitate the fitting of the first flexible tube 11 and the second flexible tube 13 onto the outside of the rigid plug 14, the outer contour of the outermost end of the protruding section 141 is flared, that is, the outer contour diameter of the protruding section 141 gradually increases from the outermost end to the binding section 142, and the outer contour diameter transitions to the binding section 142 at the point of maximum diameter. The use of a rounded transition prevents damage to the first flexible tube 11 and the second flexible tube 13 after they are fitted onto the binding section 142 due to the abrupt transition between the binding section 142 and the protruding section 141.

[0041] Preferably, an annular stop 144 is provided between the binding section 142 and the connecting section 143.

[0042] In this example, an annular stop 144 is provided between the binding section 142 and the connecting section 143. When the first hose 11 and the second hose 13 are put on the rigid plug 14, they are put on from the protruding section 141 to the binding section 142 in sequence. After being completely put on the binding section 142, they will abut against the annular stop 144. This can avoid damage to the connection between the rigid plug 14 and the nylon tube 12.

[0043] In some alternative embodiments, the first hose 11 and the second hose 13 are fitted onto the outside of the binding section 142 of the rigid plug 14, and a clamp 4 is fitted onto the outside.

[0044] In this embodiment, a clamp 4 is used to further secure the first flexible tube 11 and the second flexible tube 13, which are sleeved on the outside of the binding section 142 of the rigid plug 14. This makes the connection between the first flexible tube 11 and the second flexible tube 13 and the rigid plug 14 more secure. Of course, in other embodiments, other forms of binding and fixing can also be used, such as cable ties.

[0045] like Figure 1 and Figure 4 As shown, in a preferred embodiment, the ends of the first hose 11 and the second hose 13 are provided with clamp markings 15.

[0046] In this embodiment, clamp markings 15 are provided at the ends of the first hose 11 and the second hose 13 to clearly indicate the position of the clamp 4 and improve the accuracy of binding.

[0047] like Figure 3 As shown, preferably, the shut-off valve 2 includes a valve body 21 and a mounting bracket 22 connected thereto. The mounting bracket 22 has two mounting holes 23 spaced apart, and one of the mounting holes 23 is an elongated hole.

[0048] In this example, the shut-off valve 2 is mounted via a mounting bracket 22 connected to its valve body 21. During installation, the shut-off valve 2 can be installed by using bolts through two spaced mounting holes 23. Furthermore, one of the mounting holes 23 is an elongated hole to accommodate manufacturing tolerances and facilitate the installation of the shut-off valve 2.

[0049] In some alternative embodiments, both the inlet and outlet ends of the valve body 21 are provided with protrusions 24.

[0050] In this example, the structure of the protrusion 24 is consistent with that of the protrusion 141 in the rigid plug 14, and the effect achieved is also consistent with that of the protrusion 141, which will not be described in detail here.

[0051] In addition, the outlet end connecting pipe 3 is also a flexible hose with a certain degree of elasticity. Both the inlet and outlet ends of the valve body 21 are provided with protrusions 24, which can make the connection between the outlet end connecting pipe 3 and the outlet pipe, as well as the connection between the inlet pipe and the second flexible hose 13, tighter and reduce the possibility of detachment.

[0052] In addition, the inlet pipe and outlet pipe of the valve body 21 are both provided with cylindrical sections 25 on the inner side of the protrusion 24. The outlet end connecting pipe 3 and the second hose 13 are sleeved on the outer side of the cylindrical section 25 and fixed with clamps 4 to further avoid the possibility of the outlet end connecting pipe 3 and the second hose 13 coming apart. The other end of the outlet end connecting pipe 3 is connected to the atmosphere.

[0053] In this example, the first hose 11, the second hose 13, and the outlet end connecting pipe 3 are all made of rubber, which has good elasticity and is convenient to connect with the rigid plug 14 and the inlet and outlet pipes of the valve body 21.

[0054] Secondly, the present invention also provides a vehicle comprising the charcoal canister vent connection pipe assembly of any of the above-mentioned embodiments.

[0055] In this embodiment, when using the charcoal canister vent connection assembly, the first hose 11, nylon hose 12, and second hose 13 are connected sequentially. The first hose 11 is connected to the fuel system vent pipe, i.e., to the charcoal canister assembly. The inlet pipe of the shut-off valve 2 is connected to the second hose 13, and the outlet end connection pipe 3 is connected to the outlet pipe of the shut-off valve 2. When any of the first hose 11, nylon hose 12, or second hose 13 is damaged by collision, aging, or vibration fatigue, the corresponding damaged first hose 11, nylon hose 12, or second hose 13 can be replaced individually. There is no need to replace the entire inlet end connection pipe 1, avoiding the high cost of replacing integrated parts.

[0056] The charcoal canister vent connection pipe assembly used in the vehicle has the same structure and corresponding technical effect as the charcoal canister vent connection pipe assembly in the above embodiments. Other preferred embodiments will not be described in detail here.

[0057] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0058] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0059] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A charcoal canister venting air connection pipe assembly, characterized in that, include: The inlet end connecting pipe (1) includes a first hose (11), a nylon tube (12) and a second hose (13) connected in sequence. The first hose (11) is used to connect to the fuel system vent pipe. The shut-off valve (2) has its inlet pipe connected to the second flexible hose (13); The outlet end connecting pipe (3) is connected to the outlet pipe of the shut-off valve (2).

2. The charcoal canister vent connection pipe assembly as described in claim 1, characterized in that: Both ends of the nylon tube (12) are provided with rigid plugs (14), and the ends of the first flexible tube (11) and the second flexible tube (13) are sleeved on the outside of the rigid plugs (14) and are interference-fitted with the rigid plugs (14).

3. The charcoal canister vent connection pipe assembly as described in claim 2, characterized in that: The rigid plug (14) includes an outermost protruding section (141), a middle binding section (142), and a connecting section (143) connected to the nylon tube (12). The outer contour of the binding section (142) is cylindrical, and the maximum diameter of the protruding section (141) is greater than the diameter of the binding section (142).

4. The charcoal canister vent connection pipe assembly as described in claim 3, characterized in that: The outermost contour of the protruding segment (141) is trumpet-shaped.

5. The charcoal canister vent connection pipe assembly as described in claim 3, characterized in that: An annular stop (144) is provided between the binding section (142) and the connecting section (143).

6. The charcoal canister vent connection pipe assembly as described in claim 3, characterized in that: The first hose (11) and the second hose (13) are fitted onto the outside of the binding section (142) of the rigid plug (14), and a clamp (4) is fitted on the outside.

7. The charcoal canister vent connection pipe assembly as described in any one of claims 1-4, characterized in that, The ends of the first hose (11) and the second hose (13) are marked with clamps (15).

8. The charcoal canister vent connection pipe assembly as described in claim 1, characterized in that: The shut-off valve (2) includes a valve body (21) and a mounting bracket (22) connected thereto. The mounting bracket (22) has two mounting holes (23) spaced apart, and one of the mounting holes (23) is an elongated hole.

9. The charcoal canister vent connection pipe assembly as described in claim 8, characterized in that: The valve body (21) has protrusions (24) at the ends of both the inlet pipe and the outlet pipe.

10. A vehicle, characterized in that: Includes the charcoal canister vent connection pipe assembly as described in any one of claims 1-9.

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