Carburetor fuel pump, fuel pump, fuel pump assembly, and vehicle

Abstract

The utility model discloses a kind of valve core assembly of oil tank isolation valve, oil tank isolation valve, oil tank assembly and vehicle, the valve core assembly of oil tank isolation valve includes: moving core, sealing element and valve core, valve core is fixedly connected with moving core, to with moving core synchronous motion, sealing element is sleeved in valve core and valve core movable relative to sealing element, to selectively control the pressure relief of oil tank by the way of relative motion. By connecting valve core on moving core, so that valve core can move with moving core, and sealing element is arranged on valve core, moving core can drive sealing element and valve core to move, so that moving core, sealing element and valve core can control different operating conditions of oil tank, so that the volume of valve core assembly can be reduced, assembly steps are simplified, manufacturing difficulty is reduced, cost is saved, control reliability of oil tank different operating conditions can also be improved, the performance of valve core assembly is optimized.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a valve core assembly of a fuel tank isolation valve, a fuel tank isolation valve, a fuel tank assembly, and a vehicle. Background Technology

[0002] Currently, with the development of science and technology, people are paying more and more attention to environmental protection. Carbon emissions have become a key concern for many countries and regions. More and more automotive companies are choosing high-pressure fuel tanks instead of traditional atmospheric fuel tanks. As an indispensable part of the high-pressure fuel tank, the fuel tank isolation valve mainly connects the high-pressure fuel tank and the carbon canister. Through the automatic or passive control of the internal solenoid valve and pressure relief valve, it isolates oil and gas in the fuel tank, preventing oil and gas from continuously entering the carbon canister and reducing the risk of oil and gas pollutants leaking into the atmosphere, resulting in good environmental protection effects.

[0003] In related technologies, the valve core in the fuel tank isolation valve has the functions of opening and closing control, sealing, pressure resistance and corrosion resistance. The valve core in the fuel tank isolation valve includes a pressure relief valve, an air supply valve and a solenoid valve. The three are arranged separately, which not only causes mutual interference, but also leads to a larger size of the fuel tank isolation valve and increases the overall vehicle cost. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a valve core assembly for a fuel tank isolation valve, which integrates a pressure relief valve, a replenishing valve, and a solenoid valve into a single unit. This optimizes the performance of the valve core assembly, reduces the size of the fuel tank isolation valve, and lowers the overall vehicle cost.

[0005] This utility model further proposes an oil tank isolation valve.

[0006] This utility model further proposes a fuel tank assembly.

[0007] This utility model further proposes a vehicle.

[0008] The valve core assembly of the oil tank isolation valve according to this utility model includes: a moving iron core, a sealing element, and a valve core. The valve core is fixedly connected to the moving iron core so as to move synchronously with the moving iron core. The sealing element is sleeved on the valve core and the valve core is movable relative to the sealing element so as to selectively control the pressure relief of the oil tank through relative movement.

[0009] According to the present invention, the valve core assembly of the oil tank isolation valve connects the valve core to the moving iron core, allowing the valve core to move with the moving iron core. Furthermore, a sealing element is provided on the valve core, and the moving iron core can drive the sealing element and the valve core to move. This allows the moving iron core, the sealing element, and the valve core to control different operating conditions of the oil tank, thereby reducing the size of the valve core assembly, simplifying assembly steps, reducing manufacturing difficulty, saving costs, improving the control reliability of the oil tank under different operating conditions, and optimizing the performance of the valve core assembly.

[0010] In some examples of this utility model, the moving iron core is provided with a fixing hole, and the end of the valve core is disposed in the fixing hole and is interference-fitted with the fixing hole.

[0011] In some examples of this utility model, the end of the valve core is welded to the moving iron core.

[0012] In some examples of this utility model, the valve core includes a valve seat and a valve stem, the sealing element is located between the moving iron core and the valve seat, the valve stem is connected to the valve seat, the valve stem is fixedly connected to the moving iron core, and the sealing element is sleeved on the valve stem.

[0013] In some examples of this utility model, the sealing element is provided with a pressure relief hole. When the sealing element is in contact with the valve seat, the valve seat closes one end of the pressure relief hole. When the sealing element is separated from the valve seat, the one end of the pressure relief hole opens.

[0014] In some examples of this utility model, the moving iron core includes: an iron core body and a connecting rod, the connecting rod being connected to one end of the iron core body near the valve core, and the valve stem being fixedly connected to the connecting rod.

[0015] In some examples of this utility model, the sealing element includes a sleeve portion and a sealing portion, wherein the sleeve portion is sleeved on the valve core and the sealing portion is disposed on the outer periphery of the sleeve portion.

[0016] In some examples of this utility model, the valve core assembly of the tank isolation valve further includes a pressure relief elastic element, which is disposed between the moving iron core and the sealing element to provide elastic pressure to the sealing element.

[0017] In some examples of this utility model, the valve core assembly of the tank isolation valve further includes a sealing ring, which is disposed at the end of the moving iron core away from the valve core.

[0018] The oil tank isolation valve according to this utility model includes: a valve body, an electromagnetic coil assembly, and a valve core assembly of the oil tank isolation valve described above. The valve body is provided with an oil tank interface and a carbon canister interface. The electromagnetic coil assembly is disposed inside the valve body. The valve core assembly is disposed inside the valve body and selectively controls the on / off connection between the oil tank interface and the carbon canister interface. The moving iron core is magnetically induced by the energized electromagnetic coil assembly.

[0019] In some examples of this utility model, the tank isolation valve further includes: an air-replenishing elastic element disposed between the electromagnetic coil assembly and the seal to provide elastic pressure to the seal.

[0020] In some examples of this utility model, the outer surface of the valve housing is provided with an oil tank snap-fit ​​portion for snapping with the oil tank.

[0021] In some examples of this utility model, there are multiple oil tank snap-fit ​​parts, and the multiple oil tank snap-fit ​​parts are distributed at intervals on the outer surface of the valve housing.

[0022] The fuel tank assembly according to this utility model includes: a fuel tank, a carbon canister and the above-mentioned fuel tank isolation valve, wherein the fuel tank interface is connected to the fuel tank and the carbon canister interface is connected to the carbon canister.

[0023] The vehicle according to this utility model includes: the fuel tank assembly described above.

[0024] Compared with the prior art, this utility model adopts a method of connecting the valve core to the moving iron core, so that the valve core can move with the moving iron core. Moreover, a sealing element is set on the valve core, and the moving iron core can drive the sealing element and the valve core to move. This allows the moving iron core, the sealing element and the valve core to control different operating conditions of the oil tank, thereby reducing the size of the valve core assembly, simplifying the assembly steps, reducing manufacturing difficulty and saving costs. It can also improve the control reliability of the oil tank under different operating conditions and optimize the performance of the valve core assembly.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the tank isolation valve according to an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the tank isolation valve according to an embodiment of the present utility model; Figure 3This is an exploded view of the oil tank isolation valve according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the valve core assembly according to an embodiment of the present utility model; Figure 5 This is a cross-sectional view of the valve core assembly according to an embodiment of the present utility model; Figure 6 This is a structural diagram of the fuel tank under depressurization conditions; Figure 7 This is a schematic diagram of the fuel tank refueling operation. Figure 8 This is a structural diagram of the fuel tank during refueling.

[0027] Figure label: 1000, fuel tank isolation valve; 100. Valve core assembly; 10. Moving iron core; 11. Fixing hole; 12. Iron core body; 13. Connecting rod; 20. Sealing element; 21. Sleeve part; 22. Sealing part; 23. Pressure relief hole; 30. Valve core; 31. Valve seat; 32. Valve stem; 40. Pressure relief elastic element; 50. Sealing ring; 200, Valve housing; 210, Oil tank interface; 220, Carbon canister interface; 230, Oil tank snap-fit ​​part; 300, Electromagnetic coil assembly; 400, Air replenishment elastic element. Detailed Implementation

[0028] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0029] The following is for reference. Figures 1-8 This invention describes a valve core assembly 100 of a fuel tank isolation valve 1000 according to an embodiment of the present invention. The valve core assembly 100 of the fuel tank isolation valve 1000 is used in a fuel tank assembly, for example, in vehicles, aircraft, construction machinery, and agricultural machinery.

[0030] like Figures 1-5 As shown, the valve core assembly 100 of the oil tank isolation valve 1000 according to the present invention includes: a moving iron core 10, a sealing element 20 and a valve core 30. The valve core 30 is fixedly connected to the moving iron core 10, so that it can move synchronously with the moving iron core 10. The sealing element 20 is sleeved on the valve core 30 and the valve core 30 is movable relative to the sealing element 20, so that the pressure relief of the oil tank can be selectively controlled by relative movement.

[0031] It is understandable that the moving iron core 10, the seal 20, and the valve core 30 constitute the main structure of the valve core assembly 100 of the oil tank isolation valve. The moving iron core 10 can move under the action of magnetic force. The valve core 30 is fixedly connected to the lower end of the moving iron core 10, so that the valve core 30 can move with the up and down movement of the moving iron core 10. The seal 20 is sleeved on the outer periphery of the valve core 30, and the seal 20 can also move with the movement of the moving iron core 10. When the gas pressure in the oil tank is too high, the moving iron core 10 drives the valve core 30 to move downward. This allows both the moving iron core 10 and the valve core 30 to move relative to the seal 20, venting excess fuel vapor from the tank and thus depressurizing it. Furthermore, the moving iron core 10 can drive the valve core 30 and the seal 20 upwards, allowing for the replenishment of air or fuel to the tank. The connection between the moving iron core 10, the seal 20, and the valve core 30 simplifies the assembly steps of the valve core assembly 100, reducing the number of control points under different operating conditions and improving the reliability of control under these conditions.

[0032] Therefore, by connecting the valve core 30 to the moving iron core 10, the valve core 30 can move with the moving iron core 10. Moreover, the valve core 30 is provided with a sealing element 20. The moving iron core 10 can drive the sealing element 20 and the valve core 30 to move. This allows the moving iron core 10, the sealing element 20 and the valve core 30 to control different operating conditions of the oil tank. This reduces the size of the valve core assembly 100, simplifies the assembly steps, reduces manufacturing difficulty, saves costs, improves the control reliability of the oil tank under different operating conditions, and optimizes the performance of the valve core assembly 100.

[0033] One option is, such as Figure 5 As shown, the moving iron core 10 is provided with a fixing hole 11, the end of the valve core 30 is provided in the fixing hole 11, and the end of the valve core 30 is interference-fitted with the fixing hole 11.

[0034] It is understandable that a fixing hole 11 is provided at the lower end of the moving iron core 10. The fixing hole 11 is located on the central axis of the moving iron core 10, and the upper end of the valve core 30 is installed in the fixing hole 11. This not only facilitates the installation and disassembly of the valve core 30 and the moving iron core 10, but also ensures the balance of the moving iron core 10 and the valve core 30 during movement. Moreover, the size of the upper end of the valve core 30 is larger than the diameter of the fixing hole 11, which allows for an interference fit between the valve core 30 and the moving iron core 10. This makes the connection between the valve core 30 and the moving iron core 10 more secure, with no relative sliding. It also eliminates the need for other fixing parts outside the valve core 30 and the moving iron core 10, and ensures the coaxiality between the valve core 30 and the moving iron core 10. This ensures the positioning accuracy of the moving valve core 30 and the valve core 30, as well as the uniform load transmission between the valve core 30 and the moving iron core 10, thereby optimizing the performance of the valve core assembly 100.

[0035] Alternatively, the end of the valve core 30 is welded to the moving iron core 10, that is, the upper end of the valve core 30 and the lower end of the moving iron core 10 are welded together. This can ensure the connection strength between the valve core 30 and the moving iron core 10, thereby ensuring the positioning accuracy of the moving valve core 30 and the uniform load transmission between the valve core 30 and the moving iron core 10, and thus optimizing the performance of the valve core assembly 100.

[0036] In addition, such as Figure 4 and Figure 5 As shown, the valve core 30 includes a valve seat 31 and a valve stem 32. A sealing element 20 is located between the moving iron core 10 and the valve seat 31. The valve stem 32 is connected to the valve seat 31 and is fixedly connected to the moving iron core 10. The sealing element 20 is sleeved on the valve stem 32.

[0037] In other words, the valve seat 31 and the valve stem 32 constitute the main structure of the valve core 30. The valve seat 31 is located at the lower end of the valve stem 32, and the valve stem 32 is located in the middle of the valve seat 31. This ensures the dynamic balance of the valve core 30, thereby ensuring the coaxiality of the movement of the valve core 30 and the moving iron core 10. The upper end of the valve stem 32 is connected to the moving iron core 10, so that the valve core 30 and the moving iron core 10 are connected as a whole, which facilitates the moving iron core 10 to drive the valve core 30 to move up and down. The sealing element 20 is sleeved on the outer periphery of the valve stem 32, and the sealing element 20 is located between the moving iron core 10 and the valve seat 31. This allows the moving iron core 10 to drive the sealing element 20 to cope with different working conditions of the oil tank, thereby meeting the needs of oil tank depressurization, air replenishment, or oil filling.

[0038] In addition, such as Figure 5 As shown, the seal 20 is provided with a pressure relief hole 23. When the seal 20 is in contact with the valve seat 31, the valve seat 31 closes one end of the pressure relief hole 23. When the seal 20 is separated from the valve seat 31, one end of the pressure relief hole 23 opens.

[0039] It is understandable that a pressure relief hole 23 is provided in the middle of the seal 20. When the fuel tank needs to be depressurized, the seal 20 and the valve seat 31 form a certain distance in the vertical direction, and the excess fuel vapor in the fuel tank is discharged from the pressure relief hole 23, thereby depressurizing the fuel tank. When the fuel tank needs to be refilled with air or fuel, the seal 20 contacts the valve seat 31, and the pressure relief hole 23 is closed, thereby refilling the fuel tank with air or fuel.

[0040] In addition, such as Figure 4 and Figure 5 As shown, the moving iron core 10 includes: an iron core body 12 and a connecting rod 13. The connecting rod 13 is connected to one end of the iron core body 12 near the valve core 30, and the valve stem 32 is fixedly connected to the connecting rod 13.

[0041] In other words, the iron core body 12 and the connecting rod 13 constitute the main structure of the moving iron core 10. The iron core body 12 is located at the upper end of the connecting rod 13, and the connecting rod 13 is located in the middle of the iron core body 12. This can ensure the dynamic balance of the moving iron core 10, thereby ensuring the coaxiality of the movement of the valve core 30 and the moving iron core 10. The lower end of the connecting rod 13 is provided with a fixing hole 11, and the upper end of the valve stem 32 is provided with a fixing hole 11. This can connect the connecting rod 13 and the valve stem 32 into a whole, thereby making the connection between the valve core 30 and the moving iron core 10 more firm and without relative sliding. This can ensure the positioning accuracy of the moving valve core 30 and the valve core 30, as well as ensure the uniform transmission of load between the valve core 30 and the moving iron core 10, thereby optimizing the performance of the valve core assembly 100.

[0042] In addition, such as Figure 4 and Figure 5 As shown, the sealing element 20 includes a sleeve portion 21 and a sealing portion 22. The sleeve portion 21 is sleeved on the valve core 30, and the sealing portion 22 is disposed on the outer periphery of the sleeve portion 21.

[0043] It is understandable that the sleeve portion 21 and the sealing portion 22 constitute the main structure of the sealing element 20. The sleeve portion 21 is sleeved on the outer periphery of the valve stem 32, so that the sealing element 20 can be set on the valve core 30. Thus, the sealing element 20 can move with the movement of the valve core 30 and the moving iron core 10. The sealing portion 22 is set at the lower end of the sleeve portion 21 and extends along the outer periphery of the sleeve portion 21. This can ensure the sealing area of ​​the sealing portion 22, so that the oil tank can be depressurized, replenished with air, and refilled. It can also reduce the control points in the process of depressurizing, replenishing with air, or refilling the oil tank, thereby improving the control reliability of depressurizing, replenishing with air, or refilling the oil tank.

[0044] In addition, such as Figures 2-5 As shown, the valve core assembly 100 of the oil tank isolation valve also includes a pressure relief elastic element 40, which is disposed between the moving iron core 10 and the sealing element 20, thereby providing elastic pressure to the sealing element 20.

[0045] In other words, the pressure relief elastic element 40 is disposed on the outer periphery of the sleeve portion 21. The upper end of the pressure relief elastic element 40 abuts against the lower surface of the connecting rod 13, and the lower end of the pressure relief elastic element 40 abuts against the upper surface of the sealing portion 22. This allows the pressure relief elastic element 40 to be positioned between the moving iron core 10 and the sealing element 20, thereby providing elastic pressure to the sealing element 20. When the oil tank needs to cope with different operating conditions, the sealing element 20 overcomes the pressure of the pressure relief elastic element 40, thus meeting the needs of pressure relief, air replenishment, or oil filling of the oil tank. The pressure relief elastic element 40 can be a coil spring.

[0046] In addition, such as Figures 3-5As shown, the valve core assembly 100 of the oil tank isolation valve also includes a sealing ring 50, which is disposed at the end of the moving iron core 10 away from the valve core 30.

[0047] It is understandable that the sealing ring 50 is set at the upper end of the moving iron core 10. When the moving iron core 10 needs to move, other components provide a certain power to the moving iron core 10. The sealing ring 50 can prevent the moving iron core 10 from colliding with other components, thereby ensuring the movement stability of the moving iron core 10, preventing damage to the moving iron core 10, and thus extending the service life of the moving iron core 10.

[0048] like Figures 1-5 As shown, the oil tank isolation valve 1000 according to this utility model includes: a valve body 200, an electromagnetic coil assembly 300, and a valve core assembly 100 of the oil tank isolation valve 1000 in the above embodiments. By connecting the valve core 30 to the moving iron core 10, the valve core 30 can move with the moving iron core 10. Moreover, a sealing element 20 is provided on the valve core 30. The moving iron core 10 can drive the sealing element 20 and the valve core 30 to move. In this way, the moving iron core 10, the sealing element 20, and the valve core 30 can control the depressurization, air replenishment, or oil filling of the oil tank. This can reduce the volume of the valve core assembly 100, simplify the assembly steps, reduce the manufacturing difficulty, save costs, improve the control reliability of oil tank depressurization, air replenishment, or oil filling, and optimize the performance of the valve core assembly 100.

[0049] The valve housing 200 is provided with an oil tank interface 210 and a carbon canister interface 220. The central axes of the oil tank interface 210 and the carbon canister interface 220 are perpendicular, which allows the oil tank interface 210 and the carbon canister interface 220 to be relatively separated and operate independently. The electromagnetic coil assembly 300 and the valve core assembly 100 are disposed inside the valve housing 200, which protects the electromagnetic coil assembly 300 and the valve core assembly 100, thereby extending their service life and ensuring the electromagnetic coil... The performance of component 300 and valve core assembly 100: Valve core assembly 100 selectively controls the on / off connection between oil tank interface 210 and carbon canister interface 220, thus satisfying the oil tank for depressurization, air replenishment, or refueling. The moving iron core 10 magnetically induces the energized electromagnetic coil assembly 300, which is located above the moving iron core 10. When the moving iron core 10 needs to move upward, the electromagnetic coil assembly 300 is energized to generate magnetic induction, thereby satisfying the refueling condition of the oil tank and ensuring the reliability of the oil tank.

[0050] In addition, such as Figures 1-3 As shown, the tank isolation valve 1000 also includes an air-replenishing elastic element 400, which is disposed between the electromagnetic coil assembly 300 and the seal 20, thereby providing elastic pressure to the seal 20.

[0051] In other words, the upper end of the air-replenishing elastic element 400 abuts against the electromagnetic coil assembly 300, and the lower end of the air-replenishing elastic element 400 abuts against the sealing element 20. This allows the air-replenishing elastic element 400 to provide elastic pressure to the sealing element 20, thereby maintaining the motion balance of the valve core assembly 100 and buffering and damping the sealing element 20, thus ensuring the reliability of the oil tank air replenishment control. The air-replenishing elastic element 400 can be a helical spring.

[0052] In addition, such as Figure 1 and Figure 3 As shown, the outer surface of the valve housing 200 is provided with a fuel tank snap-fit ​​part 230, which can be used to snap-fit ​​with the fuel tank. This configuration can eliminate the need for bolt fixing between the valve housing 200 and the fuel tank, improve the assembly efficiency between the valve housing 200 and the fuel tank, thereby ensuring the space utilization of the vehicle and saving labor costs.

[0053] In particular, such as Figure 1 and Figure 3 As shown, there are multiple oil tank snap-fit ​​parts 230, which are distributed at intervals on the outer surface of the valve body 200. This arrangement facilitates the connection between the valve body 200 and the oil tank through the oil tank snap-fit ​​parts 230. The connection between the multiple oil tank snap-fit ​​parts 230 and the oil tank is more stable, thereby ensuring the performance of the oil tank isolation valve 1000.

[0054] The fuel tank assembly of this utility model includes: a fuel tank, a carbon canister, and a fuel tank isolation valve 1000 as described in the above embodiment. A fuel tank interface 210 is connected to the fuel tank, and a carbon canister interface 220 is connected to the carbon canister. This arrangement allows the fuel tank isolation valve 1000 to connect both the fuel tank and the carbon canister.

[0055] Specifically, the fuel tank has functions for depressurization, air replenishment, and refueling: The first type is the pressure relief condition, such as... Figure 6 As shown, when the gas pressure in the fuel tank is greater than the pressure in the carbon canister and exceeds the limit, the fuel tank pressure is set to 28 kPa to 34 kPa. The fuel vapor in the fuel tank overcomes the resistance of the pressure relief elastic element 40, pushes the valve core 30 downward, opens the pressure relief hole 23, connects the fuel tank and the carbon canister, and allows excess fuel vapor to enter the carbon canister. The adsorption particles in the carbon canister adsorb the excess fuel vapor, thereby preventing fuel vapor from being emitted to the outside.

[0056] The second type is the air replenishment mode, such as... Figure 7 As shown, when the gas pressure in the oil tank is less than the pressure in the carbon canister and exceeds the limit, the oil tank pressure is set to -9 kPa to -14 kPa. The air pressure from the carbon canister pushes the sealing element 20 to move upward against the pressure of the air replenishing elastic element 400, and the oil tank and the carbon canister are connected. The air in the carbon canister enters the oil tank, thereby preventing the oil tank from collapsing inward due to excessive negative pressure.

[0057] The third type is refueling operation, such as... Figure 8 As shown, in order to prevent oil and gas leakage during refueling and to ensure smooth refueling, the oil and gas in the tank must be vented to the carbon canister before refueling. When the electromagnetic coil assembly 300 is energized, the moving iron core 10 receives magnetic force and moves upward. At this time, the sealing component 20 also moves upward, and the tank and carbon canister are connected. Excess oil and gas enter the carbon canister from the tank.

[0058] The vehicle according to this utility model includes: the fuel tank assembly of the above embodiments. By connecting the valve core 30 to the moving iron core 10, the valve core 30 can move with the moving iron core 10. Furthermore, a sealing element 20 is provided on the valve core 30. The moving iron core 10 can drive the sealing element 20 and the valve core 30 to move. This allows the moving iron core 10, the sealing element 20, and the valve core 30 to control different operating conditions of the fuel tank, thereby reducing the volume of the valve core assembly 100, simplifying assembly steps, reducing manufacturing difficulty, saving costs, improving the control reliability of the fuel tank under different operating conditions, and optimizing the performance of the valve core assembly 100.

[0059] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 utility model and simplifying the description, and are not intended to 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 utility model.

[0060] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A valve core assembly (100) of a tank isolation valve (1000), characterized in that, include: Moving iron core (10); Seal (20); The valve core (30) is fixedly connected to the moving iron core (10) so as to move synchronously with the moving iron core (10). The sealing element (20) is sleeved on the valve core (30) and the valve core (30) is movable relative to the sealing element (20) so as to selectively control the pressure relief of the oil tank through relative movement.

2. The valve core assembly (100) of the tank isolation valve (1000) according to claim 1, characterized in that, The moving iron core (10) is provided with a fixing hole (11), and the end of the valve core (30) is provided in the fixing hole (11) and is interference-fitted with the fixing hole (11).

3. The valve core assembly (100) of the tank isolation valve (1000) according to claim 1, characterized in that, The end of the valve core (30) is welded to the moving iron core (10).

4. The valve core assembly (100) of the tank isolation valve (1000) according to claim 1, characterized in that, The valve core (30) includes: Valve seat (31), the seal (20) is located between the moving iron core (10) and the valve seat (31); The valve stem (32) is connected to the valve seat (31), the valve stem (32) is fixedly connected to the moving iron core (10), and the sealing element (20) is sleeved on the valve stem (32).

5. The valve core assembly (100) of the tank isolation valve (1000) according to claim 4, characterized in that, The sealing element (20) is provided with a pressure relief hole (23). When the sealing element (20) is in contact with the valve seat (31), the valve seat (31) closes one end of the pressure relief hole (23). When the sealing element (20) is separated from the valve seat (31), the one end of the pressure relief hole (23) opens.

6. The valve core assembly (100) of the tank isolation valve (1000) according to claim 1, characterized in that, The moving iron core (10) includes: Iron core body (12); A connecting rod (13) is connected to one end of the iron core body (12) near the valve core (30), and the valve stem (32) is fixedly connected to the connecting rod (13).

7. The valve core assembly (100) of the tank isolation valve (1000) according to claim 1, characterized in that, The seal (20) includes: The sleeve (21) is sleeved on the valve core (30). A sealing part (22) is disposed on the outer periphery of the sleeve part (21).

8. The valve core assembly (100) of the tank isolation valve (1000) according to claim 1, characterized in that, Also includes: A pressure relief elastic element (40) is disposed between the moving iron core (10) and the seal (20) to provide elastic pressure to the seal (20).

9. The valve core assembly (100) of the tank isolation valve (1000) according to claim 1, characterized in that, Also includes: A sealing ring (50) is disposed at the end of the moving iron core (10) away from the valve core (30).

10. A tank isolation valve (1000), characterized in that, include: Valve housing (200), the valve housing (200) is provided with oil tank interface (210) and carbon canister interface (220); An electromagnetic coil assembly (300) is disposed within the valve housing (200); The valve core assembly (100) of the tank isolation valve (1000) according to any one of claims 1-9, the valve core assembly (100) is disposed in the valve housing (200) and selectively controls the on / off connection between the tank interface (210) and the carbon canister interface (220), the moving iron core (10) magnetically inducing the energized electromagnetic coil assembly (300).

11. The tank isolation valve (1000) according to claim 10, characterized in that, Also includes: An air-replenishing elastic element (400) is disposed between the electromagnetic coil assembly (300) and the seal (20) to provide elastic pressure to the seal (20).

12. The tank isolation valve (1000) according to claim 10, characterized in that, The outer surface of the valve housing (200) is provided with an oil tank snap-fit ​​part (230) for snapping with the oil tank.

13. The tank isolation valve (1000) according to claim 12, characterized in that, There are multiple oil tank snap-fit ​​parts (230), and the multiple oil tank snap-fit ​​parts (230) are distributed at intervals on the outer surface of the valve body (200).

14. A fuel tank assembly, characterized in that, include: tank; Carbon canister; The tank isolation valve (1000) according to any one of claims 10-13, wherein the tank interface (210) is connected to the tank and the carbon canister interface (220) is connected to the carbon canister.

15. A vehicle, characterized in that, include: The fuel tank assembly as claimed in claim 14.

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