Combination valve assembly for isolating valve and high-pressure oil tank isolating valve

Abstract

The utility model provides a combination valve assembly for isolating valve and high-pressure oil tank isolating valve, the combination valve assembly comprises a shell, a first valve component, a second valve component and a driving component, the shell is provided with a partition plate, and the partition plate is provided with a first channel and a second channel which are used for communicating an upper cavity and a lower cavity; at least one part of the first valve assembly elastically abuts against the partition plate so as to seal the first channel. The second valve assembly is provided with an auxiliary pressure relief hole penetrating through the second sealing face. The lower portion of the first valve assembly is provided with a guide column matched with the auxiliary pressure relief hole in a sliding and sealing mode. The driving assembly can drive at least one part of the first valve assembly to move in the shell so as to control the second channel to be opened, when the second channel is opened, the guide column is disengaged from the auxiliary pressure relief hole so as to open the auxiliary pressure relief hole located in the second channel, and under the condition that the product size is not changed, the overall circulation sectional area is increased, and the circulation capacity is improved; and the pressure drop becomes small, and the requirements for the pressure relief speed under different working conditions can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of isolation valves, and more specifically, to a combined valve assembly for an isolation valve and a high-pressure fuel tank isolation valve. Background Art

[0002] With the increasingly serious pollution of automobile exhaust, the regulations on automobile exhaust emissions that have been promulgated have imposed stricter restrictions on the emissions allowed by vehicles into the atmosphere, but have also promoted the rapid development of automotive hybrid technology. Currently, hybrid vehicle models including plug-in hybrid electric vehicles (PHEVs) and range-extended electric vehicles (REEVs) have gradually become the most acceptable vehicle models for the general public after several years of technological accumulation.

[0003] Hybrid vehicle models not only have good fuel economy but also can switch between engine operation and battery operation, which can well solve the anxiety caused by the unstable mileage of pure electric vehicles. However, in hybrid vehicle models, the switching between the fuel circuit and the electrical circuit may cause the oil and gas vapor inside the fuel tank to be frequently transported to the carbon canister, saturating it or even directly discharging it into the atmosphere. Currently, a fuel tank isolation valve is usually used to strictly control the emission of the oil and gas evaporation gas from the fuel tank to the carbon canister.

[0004] In the prior art, the interior of the housing in the fuel tank isolation valve is divided into upper and lower gas chambers by an intermediate partition. A mechanical valve pressure relief channel is designed in the center of the partition; solenoid valve pressure relief channels are evenly distributed around the central channel. At the same time, the solenoid valve pressure relief channels are sealed with rubber seals of the solenoid valve in the upper gas chamber, and the mechanical valve pressure relief is sealed with rubber seals of the mechanical valve in the lower gas chamber. In this way, the pressure relief channels of the two valves work independently of each other, which means that to meet the requirements of flow resistance, a larger structure is needed to leave enough cross-sectional area of the pressure relief channels to meet the pressure relief speed under different working conditions.

[0005] Therefore, in the prior art, there is a technical problem that the cross-sectional area of the pressure relief channel of the existing isolation valve is small and cannot meet the pressure relief speed under different working conditions. Summary of the Utility Model

[0006] The main purpose of the present utility model is to provide a combined valve assembly for an isolation valve and a high-pressure fuel tank isolation valve to solve the technical problems in the related art, namely, the small cross-sectional area of the pressure relief channel and the inability to meet the pressure relief speed under different working conditions.

[0007] To achieve the above object, according to one aspect of the present utility model, a combined valve assembly for an isolation valve is provided, comprising: a housing having a partition and separated by the partition into an upper cavity and a lower cavity, the partition being provided with a first channel and a second channel for communicating the upper cavity and the lower cavity; a first valve assembly disposed in the upper cavity, at least a part of the first valve assembly elastically pressing against the partition to seal the first channel; a second valve assembly disposed in the lower cavity, one end of the second valve assembly facing the partition having a second sealing surface, the second sealing surface elastically pressing against one side of the partition in the lower cavity to seal the second channel, wherein the second valve assembly is provided with an auxiliary pressure relief hole penetrating through the second sealing surface, the auxiliary pressure relief hole being capable of communicating the upper cavity and the lower cavity, and a guide post slidably and sealingly engaged with the auxiliary pressure relief hole being provided at the lower part of the first valve assembly; a driving assembly disposed in the upper cavity, the driving assembly being connected to the first valve assembly and capable of driving at least a part of the first valve assembly to move in the housing, thereby controlling the opening of the second channel, and when the second channel is opened, the guide post disengages from the auxiliary pressure relief hole.

[0008] Further, the first valve assembly includes: an armature; a first sealing valve connected to the armature; a first spring, one end of the first spring abutting against the driving assembly and the other end of the first spring abutting against the first sealing valve, thereby pressing the first sealing valve against the partition.

[0009] Further, an armature sealing surface is provided at one end of the armature close to the partition, the guide post is located on the armature sealing surface and protrudes from the armature sealing surface, and when the guide post is slidably and sealingly engaged with the auxiliary pressure relief hole, the armature sealing surface abuts against the second sealing surface.

[0010] Further, the armature sealing surface is annular, and the outer diameter of the armature sealing surface is smaller than the inner diameter of the second channel.

[0011] Further, the first sealing valve is in a cylindrical shape with an opening, the opening being located on the side away from the partition, and a first rubber sealing portion is provided on the side of the first sealing valve close to the partition, and the first rubber sealing portion presses against the partition under the driving force of the spring force of the first spring and seals the first channel.

[0012] Further, the second valve assembly includes: a second sealing valve, which is in a cylindrical shape with one end open, and the opening is located on the side away from the partition plate. A second rubber sealing portion is provided at one end of the second sealing valve close to the partition plate. The second rubber sealing portion has the second sealing surface, and an auxiliary pressure relief hole is provided on the second sealing portion; a second spring, which passes through the opening of the second sealing valve and is located inside the second sealing valve. One end of the second spring abuts against the housing, and the other end of the second spring abuts against the inner side of the end of the second sealing valve away from the opening.

[0013] Further, there are multiple second channels, and the first channel is a circular hole located at the center of the multiple second channels.

[0014] Further, the driving assembly includes a coil protection shell, a coil skeleton arranged inside the coil protection shell, an enameled wire coil wound around the coil skeleton, a pin connected to the automotive ECU, a diode respectively connecting the enameled wire coil and the pin, and a fixed iron core inserted into the enameled wire coil.

[0015] Further, the housing includes an upper housing, a middle housing, and a lower housing. The upper housing is connected to the middle housing to form the upper cavity, and the lower housing is connected to the middle housing to form the lower cavity. The middle housing is provided with a first opening for communicating with the gas in the fuel tank, and the lower housing is provided with a second opening for communicating with the gas in the carbon canister.

[0016] According to another aspect of the present invention, a high-pressure fuel tank isolation valve is provided, which includes the combined valve assembly for the isolation valve described in any one of the foregoing items.

[0017] By applying the combined valve assembly for the isolation valve and the high-pressure fuel tank isolation valve provided by the present invention, by providing an auxiliary pressure relief hole on the second valve assembly, when the driving assembly drives the first valve assembly to open the first channel, the guide post can be simultaneously driven to disengage from the auxiliary pressure relief hole, so as to open the auxiliary pressure relief hole located in the second channel. Without changing the product size, the overall flow cross-sectional area is enlarged, the flow capacity is enhanced, and the pressure drop is reduced, which can meet the requirements for the pressure relief speed under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 The structural schematic diagram of the combined valve assembly for the isolation valve according to the present invention is shown;

[0020] Figure 2 shows a schematic structural view of a first valve assembly according to the present utility model;

[0021] Figure 3 shows a top view of a partition plate according to the present utility model;

[0022] Figure 4 shows a schematic structural view of a second valve assembly according to the present utility model;

[0023] Figure 5 shows a schematic structural view of a combined valve assembly for an isolation valve in an energized state according to the present utility model;

[0024] Figure 6 shows a schematic structural view of an isolation valve according to the present utility model in a state where the fuel tank self-relieves pressure.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 10, housing; 11, partition plate; 111, first channel; 112, second channel; 12, upper cavity; 13, lower cavity; 20, first valve assembly; 21, guide post; 22, armature; 221, armature sealing surface; 23, first sealing valve; 231, first rubber sealing part; 24, first spring; 30, second valve assembly; 31, auxiliary pressure relief hole; 32, second sealing valve; 321, second rubber sealing part; 33, second spring; 40, drive assembly. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present utility model and its application or use. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] It should be noted that the terms used here are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used here, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0030] In order to solve the technical problems existing in the prior art, such as the small cross-sectional area of the pressure relief channel and the inability to meet the pressure relief speed under different working conditions, the present invention provides a combined valve assembly for an isolation valve and a high-pressure fuel tank isolation valve.

[0031] As Figures 1 to 6 shown, the first embodiment of the present invention provides a combined valve assembly for an isolation valve, including a housing 10, a first valve assembly 20, a second valve assembly 30, and a driving assembly 40, wherein the housing 10 provides an accommodation space for the first valve assembly 20, the second valve assembly 30, and the driving assembly 40. The housing 10 has a partition 11 and is separated by the partition 11 into an upper cavity 12 and a lower cavity 13. The partition 11 is provided with a first channel 111 and a second channel 112 for communicating the upper cavity 12 and the lower cavity 13.

[0032] Among them, the first valve assembly 20 is disposed in the upper cavity 12, at least a part of the first valve assembly 20 elastically presses against the partition plate 11 to seal the first channel 111. The second valve assembly 30 is disposed in the lower cavity 13. One end of the second valve assembly 30 facing the partition plate 11 has a second sealing surface, and the second sealing surface elastically presses against one side of the partition plate 11 in the lower cavity 13 to seal the second channel. The second valve assembly 30 is provided with an auxiliary pressure relief hole 31 penetrating through the second sealing surface. The auxiliary pressure relief hole 31 can communicate the upper cavity 12 and the lower cavity 13 with gas. A guide post 21 that is slidably and sealingly matched with the auxiliary pressure relief hole 31 is disposed at the lower part of the first valve assembly 20. The driving assembly 40 is disposed in the upper cavity 12. The driving assembly 40 is connected to the first valve assembly 20 and can drive at least a part of the first valve assembly 20 to move in the housing 10, so as to control the opening of the second channel 112. When the second channel 112 is opened, the guide post 21 disengages from the auxiliary pressure relief hole 31, and the auxiliary pressure relief hole 31 plays a role of auxiliary pressure relief.

[0033] Applying the combined valve assembly for an isolation valve provided by the present utility model, by providing the auxiliary pressure relief hole 31 on the second valve assembly 30, when the driving assembly 40 drives the first valve assembly 20 to open the first channel 111, the guide post 21 can be simultaneously driven to disengage from the auxiliary pressure relief hole 31, so as to open the auxiliary pressure relief hole 31 in the second channel 112. Without changing the product size, the overall flow cross-sectional area is increased, the flow capacity is enhanced, and the pressure drop is reduced, which can meet the requirements for the pressure relief speed under different working conditions.

[0034] Further, the first valve assembly 20 includes an armature 22, a first sealing valve 23, and a first spring 24. Among them, the first sealing valve 23 is connected to the armature 22. One end of the first spring 24 abuts against the driving assembly 40, and the other end of the first spring 24 abuts against the first sealing valve 23, so as to press the first sealing valve 23 against the partition plate 11. With such an arrangement, a continuous elastic force is provided to the first sealing valve 23 by the first spring 24. The structure is simple, the installation is convenient, and it is beneficial to reduce the manufacturing cost of the product.

[0035] Specifically, an armature sealing surface 221 is provided at one end of the armature 22 close to the partition plate 11. The guide post 21 is located on the armature sealing surface 221 and protrudes from the armature sealing surface 221. Preferably, the guide post 21 can be disposed, for example, at the central position of the armature sealing surface 221. After the guide post 21 is slidably and sealingly engaged with the auxiliary pressure relief hole 31, the armature sealing surface 221 can abut against the second sealing surface.

[0036] Among them, the armature sealing surface 221 is annular, and the outer diameter of the armature sealing surface 221 is smaller than the inner diameter of the second channel 112, so that the armature sealing surface 221 can pass through the second channel 112 and abut against the second sealing surface. When the driving assembly 40 is not working, due to the elastic force of the first spring 24, the armature sealing surface 221 will always abut against the second sealing surface, and jointly with the second sealing surface, seal the second channel 112.

[0037] For the convenience of installation and assembly, the first sealing valve 23 is in a cylindrical structure with an opening at one end. An accommodation space is formed inside the cylindrical structure. The opening is located on the side away from the partition 11. A part of the armature 22 passes through the opening and enters the accommodation space. A first rubber sealing portion 231 is provided on the side of the first sealing valve 23 close to the partition 11. The first spring 24 is sleeved outside the first sealing valve 23. The first rubber sealing portion 231 is pressed against the partition 11 under the driving of the spring force of the first spring 24 and seals the first channel 111. With such a structural arrangement, by providing the first rubber sealing portion 231, the airtightness of the first channel 111 can be ensured, and at the same time, it can buffer the movement of the first sealing valve 23.

[0038] Further, the second valve assembly 30 includes a second sealing valve 32 and a second spring 33. Among them, the second sealing valve 32 is in a cylindrical shape with an opening at one end. The opening is located on the side away from the partition 11. A second rubber sealing portion 321 is provided at the end of the second sealing valve 32 close to the partition 11. The second rubber sealing portion 321 has the second sealing surface, and the auxiliary pressure relief hole 31 is provided on the second sealing portion; the second spring 33 passes through the opening of the second sealing valve 32 and is located inside the second sealing valve 32. One end of the second spring 33 abuts against the housing 10, and the other end of the second spring 33 abuts against the inner side of the end of the second sealing valve 32 away from the opening.

[0039] Specifically, multiple second channels 112 can be provided. Preferably, four or five second channels 112 are provided. The first channel 111 is arranged at the center of the multiple second channels 112, and its shape can be circular or square. The four or five second channels 112 are evenly distributed around the first channel 111.

[0040] Meanwhile, for the convenience of positioning, the first channel 111 extends from the partition 11 towards the lower cavity 13 with a first support rib, and the second channel 112 extends from the partition 11 towards the lower cavity 13 with a second support rib, thereby providing a guiding channel through the first support rib and the second support rib. Preferably, reinforcing ribs are further provided on the first support rib to further improve the structural strength of the first support rib.

[0041] In another embodiment of the present invention, the driving assembly 40 includes a coil protection shell, a coil skeleton disposed within the coil protection shell, an enameled wire coil wound around the coil skeleton, a pin connected to the automotive ECU, a diode respectively connecting the enameled wire coil and the pin, and a fixed iron core inserted into the enameled wire coil.

[0042] For the convenience of installation and assembly of the housing 10, the housing 10 includes an upper housing 10, a middle housing 10, and a lower housing 10. The upper housing 10 is connected to the middle housing 10 to form the upper cavity 12, the lower housing 10 is connected to the middle housing 10 to form the lower cavity 13. The middle housing 10 is provided with a first opening for communicating with the gas in the fuel tank, and the lower housing 10 is provided with a second opening for communicating with the gas in the carbon canister.

[0043] The second embodiment of the present invention provides an isolation valve, which includes the combined valve assembly in the above embodiment.

[0044] During the use of the isolation valve of the present invention, there are three working conditions in total: the normal normally closed working condition, the pressure relief working condition where the coil in the driving assembly 40 is powered on, and the pressure relief working condition of the second valve assembly 30 under the condition of high fuel tank pressure.

[0045] Under normal working conditions, the coil in the driving assembly 40 is powered off. The first sealing valve 23 in the first valve assembly 20 seals the first channel 111 in the housing 10 under the spring force of the first spring 24, and the second sealing valve 32 in the second valve assembly 30 seals the second channel 112 in the housing 10.

[0046] As Figure 5 shown, during the engine operation and refueling working conditions, the vehicle ECU powers on the driving assembly 40 through the connector. Under the electromagnetic force of the driving assembly 40, the first valve assembly 20 moves upward. During the upward movement of the first sealing valve 23, the first channel 111 is opened. Meanwhile, during the upward movement of the armature 22, the guiding column 21 disengages from the auxiliary pressure relief hole 31, partially opening the second channel 112, increasing the pressure relief area, and enabling the pressure inside the fuel tank to be quickly released.

[0047] As Figure 6As shown, the pressure relief condition of the second valve assembly 30 under high pressure conditions inside the fuel tank is when the vehicle is parked for a long time or under high and low temperature conditions in extreme weather. The gasoline in the fuel tank continuously volatilizes under external conditions such as temperature, causing the pressure inside the fuel tank to rise. When the pressure rises to a certain limit, the gas pressure acts on the upper surface of the second sealing valve 32 in the second valve assembly 30, overcoming the elastic force of the second spring 33, and pushing the second sealing valve 32 downward, thereby opening the second channel 112 to complete pressure relief. When the second valve assembly 30 is opened under the fuel tank pressure condition, the auxiliary pressure relief hole 31 in the center is not opened, and the rubber part on the upper surface of the second valve assembly 30 always fits tightly with the sealing surface on the lower surface of the armature 22.

[0048] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0049] 1. Effectively solve the technical problems in the prior art that the cross-sectional area of the pressure relief channel is small and the pressure relief speed cannot meet different working conditions;

[0050] 2. The structure is simple and the assembly is convenient, which is beneficial to reducing the processing and manufacturing cost of the product.

[0051] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0052] For the convenience of description, spatial relative terms such as "above...", "above...", "on the upper surface of...", "above" can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure of the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures" afterwards. Thus, the exemplary term "above..." can include both "above..." and "below...". The device can also

[0053] be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here.

[0054] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional declaration, the above terms have no special meaning, so it should not be construed as a limitation on the protection scope of the present utility model.

[0055] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A combined valve assembly for an isolation valve, characterized in that, Comprising: A housing (10), the housing (10) having a partition (11) and being separated by the partition (11) into an upper cavity (12) and a lower cavity (13), and a first passage (111) and a second passage (112) for communicating the upper cavity (12) and the lower cavity (13) being provided on the partition (11); A first valve assembly (20), the first valve assembly (20) being disposed in the upper cavity (12), and at least a part of the first valve assembly (20) being elastically pressed against the partition (11) to seal the first passage (111); A second valve assembly (30), the second valve assembly (30) being disposed in the lower cavity (13), one end of the second valve assembly (30) facing the partition (11) having a second sealing surface, the second sealing surface being elastically pressed against one side of the partition (11) located in the lower cavity (13) to seal the second passage, wherein an auxiliary pressure relief hole (31) penetrating the second sealing surface is provided on the second valve assembly (30), the auxiliary pressure relief hole (31) being capable of communicating the upper cavity (12) and the lower cavity (13), and a guide post (21) slidably and sealingly engaged with the auxiliary pressure relief hole (31) being provided at the lower part of the first valve assembly (20); A driving assembly (40), the driving assembly (40) being disposed in the upper cavity (12), the driving assembly (40) being connected to the first valve assembly (20) and capable of driving at least a part of the first valve assembly (20) to move in the housing (10), thereby controlling the opening of the second passage (112), and when the second passage (112) is opened, the guide post (21) disengages from the auxiliary pressure relief hole (31).

2. The combined valve assembly for an isolation valve according to claim 1, wherein, The first valve assembly (20) includes: An armature (22); A first sealing valve (23), the first sealing valve (23) being connected to the armature (22); A first spring (24), one end of the first spring (24) abutting against the driving assembly (40), and the other end of the first spring (24) abutting against the first sealing valve (23), thereby pressing the first sealing valve (23) against the partition (11).

3. The combined valve assembly for an isolation valve according to claim 2, wherein, An armature sealing surface (221) is provided at one end of the armature (22) close to the partition (11), the guide post (21) is located on the armature sealing surface (221) and protrudes from the armature sealing surface (221), and when the guide post (21) is slidably sealed with the auxiliary pressure relief hole (31), the armature sealing surface (221) abuts against the second sealing surface.

4. The combined valve assembly for an isolation valve according to claim 3, characterized in that, The armature sealing surface (221) is annular, and the outer diameter of the armature sealing surface (221) is smaller than the inner diameter of the second passage (112).

5. The combined valve assembly for an isolation valve according to claim 2, wherein, The first sealing valve (23) is in a cylindrical shape with an opening on the side away from the partition plate (11). A first rubber sealing portion (231) is provided on the side of the first sealing valve (23) close to the partition plate (11). The first rubber sealing portion (231) is pressed against the partition plate (11) under the spring force of the first spring (24) to seal the first passage (111).

6. The combined valve assembly for an isolation valve according to claim 1, wherein, The second valve assembly (30) includes: A second sealing valve (32), which is in a cylindrical shape with one end open, and the opening is on the side away from the partition plate (11). A second rubber sealing portion (321) is provided at the end of the second sealing valve (32) close to the partition plate (11). The second rubber sealing portion (321) has the second sealing surface, and the auxiliary pressure relief hole (31) is provided on the second sealing surface; A second spring (33), which passes through the opening of the second sealing valve (32) and is located inside the second sealing valve (32). One end of the second spring (33) abuts against the housing (10), and the other end of the second spring (33) abuts against the inner side of the end of the second sealing valve (32) away from the opening.

7. The combined valve assembly for an isolation valve according to claim 1, characterized in that, There are a plurality of the second passages (112), and the first passage (111) is a circular hole located at the center of the plurality of second passages (112).

8. The combined valve assembly for an isolation valve according to claim 1, characterized in that, The driving assembly (40) includes a coil protection shell, a coil skeleton arranged in the coil protection shell, an enameled wire coil wound around the coil skeleton, a pin connected to the automotive ECU, a diode respectively connecting the enameled wire coil and the pin, and a fixed iron core inserted into the enameled wire coil.

9. The combined valve assembly for an isolation valve according to claim 1, characterized in that, The housing (10) includes an upper housing, a middle housing and a lower housing. The upper housing is connected to the middle housing to form the upper cavity (12), and the lower housing is connected to the middle housing to form the lower cavity (13). The middle housing is provided with a first opening for communicating with the gas in the fuel tank, and the lower housing is provided with a second opening for communicating with the gas in the carbon canister.

10. A high-pressure fuel tank isolation valve, characterized in that, A combined valve assembly for an isolation valve according to any one of claims 1 to 9.

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