A fuel tank system, a vehicle, and a control method for the fuel tank system.

Abstract

This application provides a fuel tank system, a vehicle, and a control method for the fuel tank system, relating to the field of vehicle technology, for preventing liquid fuel from entering the carbon canister due to overfilling during vehicle refueling. The fuel tank system includes: a fuel tank 101; a fuel pump 102, located within the fuel tank 101, including a fuel level gauge 103; a carbon canister 104, the air inlet of which is connected to the exhaust port of the fuel tank 101 via a pipeline, for adsorbing fuel vapor in the exhaust gas from the fuel tank 101; a shut-off valve 105, located at the exhaust port of the carbon canister 104, for controlling the opening or closing of the exhaust port of the carbon canister 104; and a controller, electrically connected to the fuel level gauge 103 and the shut-off valve 105, configured to: obtain the fuel level in the fuel tank 101 through the fuel level gauge 103; and, after the fuel level in the fuel tank 101 reaches a preset fuel level, control the shut-off valve 105 to close the exhaust port of the carbon canister 104.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more particularly to the field of fuel tank technology, specifically to a fuel tank system, a vehicle, and a control method for the fuel tank system. Background Technology

[0002] Currently, when refueling a vehicle, the gases in the fuel tank are released into the atmosphere through a carbon canister. The carbon canister absorbs fuel vapors from the released gases, preventing them from evaporating into the atmosphere and polluting the environment. However, in existing technology, the amount of fuel dispensed during refueling cannot be precisely controlled, which may lead to overfilling. Overfilling could result in liquid fuel entering the carbon canister, posing a risk of it failing. Summary of the Invention

[0003] This application provides a fuel tank system, a vehicle, and a control method for the fuel tank system to prevent carbon canister failure due to overfilling during vehicle refueling.

[0004] In a first aspect, a fuel tank system is provided, comprising: a fuel tank; a fuel pump disposed within the fuel tank and including a fuel level gauge; a carbon canister, the inlet of which is connected to the exhaust port of the fuel tank via a pipeline for adsorbing fuel vapor in the exhaust gas from the fuel tank; a shut-off valve disposed at the exhaust port of the carbon canister for controlling the opening or closing of the exhaust port of the carbon canister; and a controller electrically connected to the fuel level gauge and the shut-off valve, configured to: obtain the fuel level height in the fuel tank via the fuel level gauge; and control the shut-off valve to close the exhaust port of the carbon canister after the fuel level height in the fuel tank reaches a preset fuel level height.

[0005] Based on the aforementioned technical means, this application can control the shut-off valve to close the vent of the carbon canister after the fuel level in the tank reaches a preset level. With the carbon canister's vent closed, the fuel tank cannot release any gas, leading to increased pressure within the tank and preventing fuel from entering. In other words, once the fuel level in the tank reaches the preset level, refueling is impossible. This achieves precise control over the amount of fuel added to the tank, preventing the carbon canister from failing due to liquid fuel entering it.

[0006] In some embodiments, the controller is further configured to: control the shut-off valve to open the exhaust port of the carbon canister when the oil level in the tank does not reach the preset oil level.

[0007] Based on the aforementioned technical means, this application can control the shut-off valve to open the vent of the carbon canister when the oil level in the tank has not reached the preset oil level. This ensures that the tank can be refueled normally even when it is not full.

[0008] In some embodiments, the controller is further configured to: control the shut-off valve to open the exhaust port of the carbon canister after the carbon canister has been closed for a first preset duration.

[0009] Based on the aforementioned technical means, this application can control the shut-off valve to open the carbon canister's exhaust port after the exhaust port has been closed for a first preset time. This ensures normal venting of the fuel tank and pressure balance inside and outside the fuel tank after refueling.

[0010] In some embodiments, the controller is further configured to: after the exhaust port of the carbon canister is closed, and if the oil level height detected by the oil level gauge does not change within a second preset time period, control the shut-off valve to open the exhaust port of the carbon canister.

[0011] Based on the aforementioned technical means, this application can control the shut-off valve to open the vent of the carbon canister when the oil level in the tank remains unchanged for a second preset time period. This ensures normal venting of the tank and balance of internal and external air pressure after refueling.

[0012] In some embodiments, the fuel tank vent includes a first vent and a second vent; the fuel tank system further includes: a fuel filler valve, which is disposed on the fuel tank and communicates with the first vent; the fuel filler valve closes when fuel enters the fuel filler valve and reaches the closing height; and a vent valve, which is disposed on the fuel tank and communicates with the second vent; the vent valve is positioned at a height higher than that of the fuel filler valve.

[0013] In a second aspect, a vehicle is provided that includes the fuel tank system described in the first aspect above.

[0014] Thirdly, a control method for an oil tank system is provided, wherein the oil level in the oil tank is obtained by an oil level gauge; when the oil level in the oil tank is greater than or equal to a preset oil level, a shut-off valve is controlled to close the exhaust port of the carbon canister.

[0015] In some embodiments, if the oil level in the tank does not reach the preset oil level, the control shut-off valve opens the exhaust port of the carbon canister.

[0016] In some embodiments, after the exhaust port of the carbon canister has been closed for a first preset duration, the control shut-off valve opens the exhaust port of the carbon canister.

[0017] In some embodiments, after the exhaust port of the carbon canister is closed, if the oil level height detected by the oil level gauge does not change within a second preset time period, the control shut-off valve opens the exhaust port of the carbon canister.

[0018] Fourthly, this application provides a controller, comprising: one or more processors; one or more memories; wherein the one or more memories are used to store computer program code, the computer program code including computer instructions, and when the one or more processors execute the computer instructions, the controller executes the control method for the fuel tank system provided in the second aspect and possible implementations.

[0019] Fifthly, this application provides a computer-readable storage medium including computer instructions that, when executed on a computer, cause the computer to perform the control method for the fuel tank system provided in the second aspect and possible implementations.

[0020] In a sixth aspect, embodiments of the present invention provide a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement the control method for the fuel tank system provided in the second aspect and possible implementations.

[0021] Therefore, the above-mentioned technical features of this application have the following beneficial effects:

[0022] (1) Once the fuel level in the tank reaches the preset level, the control shut-off valve closes the vent of the carbon canister. With the vent closed, the fuel tank cannot release gas, causing an increase in pressure and preventing fuel from entering. In other words, once the fuel level in the tank reaches the preset level, fuel cannot be added. This achieves precise control over the amount of fuel added, preventing the carbon canister from failing due to liquid fuel entering it.

[0023] (2) When the oil level in the tank does not reach the preset oil level, the control shut-off valve opens the vent of the carbon canister. This ensures that the tank can be refilled normally even when it is not full.

[0024] (3) After the carbon canister's exhaust port is closed for a first preset time, the control shut-off valve opens the carbon canister's exhaust port. This ensures that the fuel tank is properly vented and that the internal and external air pressure of the fuel tank is balanced after refueling.

[0025] (4) If the oil level in the tank does not change within the second preset time period, the control shut-off valve opens the vent of the carbon canister. This ensures that the tank is properly vented and the internal and external air pressure is balanced after refueling.

[0026] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the controller's processor, or it may be packaged separately from the controller's processor; this application does not impose any limitations on this.

[0027] The beneficial effects described in aspects two through six of this application can be referred to the analysis of the beneficial effects of aspect one, and will not be repeated here.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a fuel tank system provided in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of a partial relationship of a fuel tank system provided in an embodiment of this application;

[0031] Figure 3 A flowchart illustrating a control method for a fuel tank system provided in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the hardware structure of a controller provided in an embodiment of this application. Detailed Implementation

[0033] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0035] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0036] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0037] Currently, when refueling a vehicle, the gases in the fuel tank are released into the atmosphere through a carbon canister. The carbon canister absorbs fuel vapors from the released gases, preventing them from evaporating into the atmosphere and polluting the environment. However, in existing technology, the amount of fuel dispensed during refueling cannot be precisely controlled, which may lead to overfilling. Overfilling could result in liquid fuel entering the carbon canister, posing a risk of it failing.

[0038] Based on this, embodiments of this application provide a fuel tank system and its control method. This fuel tank system can monitor the fuel level in the tank. Once the fuel level reaches a preset level, it controls a shut-off valve to close the vent of the carbon canister. With the shut-off valve closed, the fuel tank cannot release gas, preventing further refueling and avoiding liquid gasoline entering the carbon canister and causing it to fail.

[0039] See Figure 1 As shown, the oil tank system provided in this application embodiment may include: oil tank 101, oil pump 102, oil level gauge 103, carbon canister 104, and shut-off valve 105.

[0040] In some embodiments, the fuel tank 101 includes a vent and is a container for holding fuel, and can be divided into open fuel tanks and closed fuel tanks.

[0041] In some embodiments, the oil pump 102 is mounted on the oil tank 101. The oil pump 102 operates by having an electric motor drive an impeller to draw fuel from the oil tank.

[0042] In some embodiments, the oil level gauge 103 is placed on the oil pump 102 to monitor the oil level in the oil tank 101. The oil level gauge 103 works by changing the position of the float in the gauge as the oil volume changes; the sliding rheostat linked to the float also changes accordingly. Under a fixed negative pressure, the output current changes accordingly, and the current value reflects the oil level in the tank.

[0043] In some embodiments, the air inlet of the carbon canister 104 is connected to the exhaust port of the fuel tank 101 via a pipeline, for adsorbing fuel vapor discharged from the fuel tank 101. The working principle of the carbon canister 104 is to utilize the adsorption properties of activated carbon to adsorb excess fuel vapor in the fuel tank.

[0044] In some embodiments, a shut-off valve 105 is disposed at the exhaust port of the carbon canister 104 to control the opening or closing of the exhaust port of the carbon canister. The shut-off valve 105 works by relying on the valve stem pressure to make the valve disc sealing surface and the valve seat sealing surface fit tightly together, thereby preventing the flow of media.

[0045] In some embodiments, the shut-off valve 105 is closed when the circuit is connected and open when the circuit is disconnected.

[0046] Optional, see Figure 1 As shown, the fuel tank system provided in this application embodiment may further include: a fuel filling limit valve 106 and a vent valve 107.

[0047] In some embodiments, the fuel tank 101 includes a first vent and a second vent.

[0048] In some embodiments, the refueling limit valve 106 is disposed on the oil tank 101 and communicates with the first vent of the oil tank 101. It is also used to shut off when the oil level in the oil tank 101 reaches a second preset value. The working principle of the refueling limit valve 106 is as follows: during the refueling process, as the oil in the oil tank rises, when the oil reaches the oil hole, the oil flows into the outer shell through the oil hole. After the oil enters, the float rises rapidly under the action of buoyancy, and drives the sealing door to rise together until the vent is closed. When the vent is closed, the refueling is completed.

[0049] In some embodiments, the vent valve 107 is disposed on the oil tank 101 and communicates with the second vent of the oil tank 101; the vent valve 107 is disposed at a height higher than the refueling limit valve 106 in the oil tank.

[0050] See Figure 2 As shown, the oil tank system also includes a controller 108, which is electrically connected to the oil level gauge 103 and the shut-off valve 105 respectively. The controller 108 can obtain the current oil level in the oil tank 101 through the oil level gauge, and can also control the shut-off valve 105 to open or close the exhaust port of the carbon canister 104.

[0051] In some embodiments, controller 108 refers to a device that can generate operation control signals according to instruction opcodes and timing signals, instructing the fuel tank system to execute control commands. Exemplarily, controller 108 can be a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Controller 108 can also be other devices with processing functions, such as circuits, devices, or software modules; this application embodiment does not impose any limitations on this.

[0052] In some embodiments, the controller 108 is configured to: obtain the oil level in the oil tank 101 through the oil level gauge 103; and control the shut-off valve 105 to close the exhaust port of the carbon canister 104 after the oil level in the oil tank 101 reaches the preset oil level.

[0053] Based on the aforementioned technical means, this application can control the shut-off valve to close the vent of the carbon canister after the fuel level in the tank reaches a preset level. With the carbon canister's vent closed, the fuel tank cannot release any gas, leading to increased pressure within the tank and preventing fuel from entering. In other words, once the fuel level in the tank reaches the preset level, refueling is impossible. This achieves precise control over the amount of fuel added to the tank, preventing the carbon canister from failing due to liquid fuel entering it.

[0054] In some embodiments, the controller 108 is further configured to control the shut-off valve 105 to open the exhaust port of the carbon canister 104 after the exhaust port of the carbon canister 104 has been closed for a first preset duration.

[0055] Based on the aforementioned technical means, this application can control the shut-off valve to open the vent of the carbon canister when the oil level in the tank has not reached the preset oil level. This ensures that the tank can be refueled normally even when it is not full.

[0056] In some embodiments, the controller 108 is further configured to: after the exhaust port of the carbon canister 104 is closed, and if the oil level height detected by the oil level gauge 103 does not change within a second preset time period, control the shut-off valve 105 to open the exhaust port of the carbon canister 104.

[0057] Based on the aforementioned technical means, this application can control the shut-off valve to open the carbon canister's exhaust port after the exhaust port has been closed for a first preset time. This ensures normal venting of the fuel tank and pressure balance inside and outside the fuel tank after refueling.

[0058] Based on the above fuel tank system, such as Figure 3 As shown in the figure, this application provides a control method for a fuel tank system, which includes the following steps:

[0059] S101. Obtain the oil level in the tank using an oil level gauge.

[0060] S102. After the oil level in the tank reaches the preset oil level, control the shut-off valve to close the exhaust port of the carbon canister.

[0061] The preset oil level can be the highest oil level in the tank, and this application embodiment does not impose any restrictions on it.

[0062] For example, the preset oil level is 220mm. When the oil level gauge shows that the current oil level in the tank is 220mm, meaning the oil level in the tank has reached the preset level, the control shut-off valve closes the exhaust port of the carbon canister.

[0063] As can be seen from the above, in the method provided in this application embodiment, when the oil level in the tank reaches the preset oil level, the control shut-off valve is closed, preventing the tank from venting and causing the pressure inside the tank to increase, thus preventing oil from entering the tank. This avoids liquid fuel entering the carbon canister and causing it to fail.

[0064] S103. If the oil level in the tank does not reach the preset oil level, control the shut-off valve to open the exhaust port of the carbon canister.

[0065] For example, the preset oil level is 220mm. If the oil level gauge shows that the current oil level in the tank is 200mm, meaning the current oil level in the tank has not reached the preset oil level, then the control shut-off valve opens the vent of the carbon canister.

[0066] As can be seen from the above, in the method provided in this application embodiment, when the oil level in the tank does not reach the preset oil level, the control shut-off valve opens the vent of the carbon canister. This ensures that refueling can proceed normally even when the oil level in the tank does not reach the preset oil level.

[0067] In some embodiments, after the exhaust port of the carbon canister has been closed for a first preset duration, the control shut-off valve opens the exhaust port of the carbon canister.

[0068] The first preset duration can be determined based on the reaction time of the gas station staff, and this application embodiment does not impose any restrictions on it.

[0069] For example, when the first preset duration is 30 seconds, the shut-off valve is controlled to open the exhaust port of the carbon canister 30 seconds after it closes the exhaust port of the carbon canister.

[0070] As can be seen from the above, in the method provided in this application embodiment, the control shut-off valve opens the carbon canister's exhaust port after a first preset time period of closure. The first preset time of closure ensures that the operator has sufficient time to stop refueling. Opening the carbon canister's exhaust port after refueling ensures that the fuel tank can normally vent after refueling, and that the air pressure inside and outside the fuel tank remains stable.

[0071] In some embodiments, after the exhaust port of the carbon canister is closed, if the oil level height detected by the oil level gauge does not change within a second preset time period, the control shut-off valve opens the exhaust port of the carbon canister.

[0072] For example, if the second preset duration is 60 seconds, and the oil level detected by the oil level gauge does not change within 60 seconds while the exhaust port of the carbon canister is closed, then the control shut-off valve opens the exhaust port of the carbon canister.

[0073] As can be seen from the above, in the method provided in this application embodiment, if the oil level does not change within the second preset time period when the exhaust port of the carbon canister is closed, the control shut-off valve opens the exhaust port of the carbon canister. If the oil level does not change within the second preset time period, refueling can be considered complete; this ensures that the fuel tank can normally vent after refueling, further ensuring stable air pressure inside and outside the fuel tank.

[0074] As can be seen, the above mainly describes the solutions provided by the embodiments of this application from a methodological perspective. To achieve the above functions, the embodiments of this application provide corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the modules and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0075] This application also provides a vehicle including the above-described fuel tank system.

[0076] This application also provides a hardware structure diagram of a controller, such as... Figure 4 As shown, the controller 108 includes a processor 111, and optionally, a memory 112 and a communication interface 113 connected to the processor 111. The processor 111, memory 112, and communication interface 113 are connected via a bus 114.

[0077] Processor 111 can be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Processor 111 can also be any other device with processing capabilities, such as a circuit, device, or software module. Processor 111 can also include multiple CPUs, and processor 111 can be a single-core processor or a multi-core processor. Here, "processor" can refer to one or more devices, circuits, or processing cores used to process data (e.g., computer program instructions).

[0078] The memory 112 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or it may be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. This application embodiment does not impose any limitations on this. The memory 112 may exist independently or may be integrated with the processor 111. The memory 112 may contain computer program code. The processor 111 is used to execute the computer program code stored in the memory 112, thereby implementing the control method provided in this application embodiment.

[0079] The communication interface 113 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.). The communication interface 113 can be a module, circuit, transceiver, or any device capable of communication.

[0080] Bus 114 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Bus 114 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0081] This application also provides a computer-readable storage medium including computer-executable instructions that, when run on a computer, cause the computer to perform any of the control methods provided in the above embodiments.

[0082] This application also provides a computer program product containing computer execution instructions, which, when run on a computer, causes the computer to execute any of the control methods provided in the above embodiments.

[0083] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, it can be implemented, in whole or in part, as a computer program product. This computer program product includes one or more computer-executable instructions. When these computer-executable instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. Computer-executable instructions can be stored in or transmitted from one computer-readable storage medium to another. For example, computer-executable instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. A computer-readable storage medium can be any available medium that a computer can access, or it can contain one or more data storage devices such as servers or data centers that can be integrated with that medium. Available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks (SSDs)).

[0084] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, the disclosure, and the appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results. Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined by the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

[0085] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fuel tank system, characterized in that, The fuel tank system includes: tank; An oil pump, located inside the oil tank, includes an oil level gauge; the current value output by the oil level gauge is used to reflect the oil level height in the oil tank. A carbon canister, the air inlet of which is connected to the exhaust outlet of the fuel tank via a pipeline, is used to adsorb fuel vapor in the exhaust gas from the fuel tank. A shut-off valve is provided at the exhaust port of the carbon canister and is used to control the opening or closing of the exhaust port of the carbon canister. The controller, which is electrically connected to the oil level gauge and the shut-off valve, is configured to: obtain the oil level height in the oil tank through the oil level gauge; and control the shut-off valve to close the exhaust port of the carbon canister after the oil level height in the oil tank reaches a preset oil level height. The controller is further configured to: after the exhaust port of the carbon canister is closed, and if the oil level height detected by the oil level gauge does not change within a second preset time period, control the shut-off valve to open the exhaust port of the carbon canister. The oil tank has a first exhaust port and a second exhaust port. The fuel tank system further includes: a fuel filling limit valve, which is disposed on the fuel tank and communicates with the first vent; the fuel filling limit valve closes when fuel enters the fuel filling limit valve and reaches the closing height; and a vent valve, which is disposed on the fuel tank and communicates with the second vent; the vent valve is set at a height higher than that of the fuel filling limit valve.

2. The fuel tank system according to claim 1, characterized in that, The controller is further configured to: control the shut-off valve to open the exhaust port of the carbon canister when the oil level in the oil tank does not reach the preset oil level.

3. The fuel tank system according to claim 1, characterized in that, The controller is further configured to: after the closure duration of the exhaust port of the carbon canister reaches a first preset duration, control the shut-off valve to open the exhaust port of the carbon canister.

4. A vehicle, characterized in that, Includes the fuel tank system as described in any one of claims 1 to 3.

5. A control method for a fuel tank system as described in any one of claims 1-3, characterized in that, The method includes: The oil level in the tank is obtained through the oil level gauge; the current value output by the oil level gauge is used to reflect the oil level in the tank. When the oil level in the tank is greater than or equal to the preset oil level, the shut-off valve is controlled to close the exhaust port of the carbon canister. After the exhaust port of the carbon canister is closed, if the oil level detected by the oil level gauge does not change within a second preset time period, the shut-off valve is controlled to open the exhaust port of the carbon canister.

6. The method according to claim 5, characterized in that, The method further includes: If the oil level in the tank does not reach the preset oil level, the shut-off valve is controlled to open the exhaust port of the carbon canister.

7. The method according to claim 5, characterized in that, The method further includes: After the exhaust port of the carbon canister has been closed for a first preset time, the shut-off valve is controlled to open the exhaust port of the carbon canister.

8. A computer-readable storage medium, characterized in that, When the computer-executable instructions stored in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device is capable of performing the method as described in any one of claims 5 to 7.

Images