Fuel system and vehicle
By introducing a refueling shut-off valve and overturn valve control path into the fuel system, combined with the carbon tank adsorbing fuel steam, the problem of fuel steam escape in the fuel tank is solved, and the cleanliness and cost-effectiveness of vehicle exhaust emissions are achieved.
Patent Information
- Application Number
- CN202422320742.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-23
AI Technical Summary
Fuel steam in the fuel tank is prone to escape, resulting in vehicle emissions not meeting the standards.
A fuel system is designed, including a fuel tank, a refueling shutoff valve, a turnover valve, a liquid collector and a carbon tank. The refueling shutoff valve and a turnover valve control the opening and closing of the passage at different liquid heights, and combined with the charcoal tank to absorb fuel steam, oil and gas separation and return flow, and avoid fuel steam escaping.
Effectively avoid oil and gas escape in the fuel tank, ensure vehicle exhaust gas emission performance, simple structure and low cost.
Smart Images
Figure CN223089418U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vehicle components, and particularly relates to a fuel system and a vehicle. Background Art
[0002] Fuel in a fuel tank is liable to evaporate and form fuel vapor filling the interior of the fuel tank. When most of the fuel in the fuel tank is consumed due to the combustion of the engine, there is a large volume of fuel vapor in the fuel tank; during the process of adding fuel to the fuel tank or when the fuel tank shakes, the fuel vapor in the fuel tank will escape, resulting in the vehicle emissions not meeting the standards. Content of the Utility Model
[0003] In view of the technical problem that fuel vapor in a fuel tank in the prior art is prone to escape, the utility model provides a fuel system and a vehicle.
[0004] To solve the above problems, an embodiment of the utility model provides a fuel system, including a fuel tank, a refueling cut-off valve, a roll-over valve, a liquid collector, and a carbon canister; a refueling hole and a fuel storage space communicating with the refueling hole are provided on the fuel tank, and both the refueling cut-off valve and the roll-over valve are installed on the fuel tank and extend into the fuel storage space;
[0005] A first opening of the liquid collector communicates with the refueling cut-off valve and the roll-over valve, and a second opening of the liquid collector communicates with the refueling hole and an adsorption port of the carbon canister;
[0006] The refueling cut-off valve is used to close the passage between the refueling cut-off valve and the first opening when the liquid level in the fuel storage space is higher than a first preset height; the roll-over valve is used to close the passage between the roll-over valve and the first opening when the liquid level in the fuel storage space is higher than a second preset height; wherein, the first preset height is less than the second preset height.
[0007] Optionally, the fuel system further includes a first vapor pipe and a second vapor pipe, opposite ends of the first vapor pipe communicate with the refueling cut-off valve and the first opening of the liquid collector respectively, and opposite ends of the second vapor pipe communicate with the roll-over valve and the first opening of the liquid collector respectively.
[0008] Optionally, the fuel system further includes a first exhaust pipe, a second exhaust pipe, an intake pipe, and a three-way joint, and the first exhaust pipe, the second exhaust pipe, and the intake pipe communicate with three interfaces of the three-way joint respectively;
[0009] One end of the first exhaust pipe away from the three-way joint communicates with the second opening of the liquid collector, one end of the second exhaust pipe away from the three-way joint communicates with the fuel filling hole, and one end of the intake pipe away from the three-way joint communicates with the adsorption port of the carbon canister.
[0010] Optionally, the inner diameter of the first exhaust pipe is greater than or equal to 11 mm.
[0011] Optionally, the inner diameter of the second exhaust pipe is greater than or equal to 11 mm.
[0012] Optionally, the fuel system further includes an air pipe and a filter; opposite ends of the air pipe communicate with the filter and the air interface of the carbon canister respectively.
[0013] Optionally, the fuel system further includes an outlet pipe and an engine, and opposite ends of the outlet pipe communicate with the intake port of the engine and the desorption port of the carbon canister respectively.
[0014] Optionally, the fuel system further includes a solenoid valve installed on the outlet pipe, and the solenoid valve is used to control the on-off of the outlet pipe.
[0015] Optionally, the fuel system further includes a fuel pump and a fuel supply pipe; opposite ends of the fuel supply pipe communicate with the fuel storage space and the fuel inlet of the engine respectively; the fuel pump is connected to the fuel supply pipe and is used to input the fuel in the fuel storage space into the fuel inlet of the engine through the fuel supply pipe.
[0016] Optionally, the fuel filling cut-off valve includes a first valve body having a first internal space and a first valve core installed in the first internal space. The first valve body is installed on the fuel tank, and the first internal space communicates with the fuel storage space; the first valve core is used to close the passage between the first internal space and the first opening when the liquid level in the fuel storage space is higher than a first preset height.
[0017] Optionally, the rollover valve includes a second valve body having a second internal space and a second valve core installed in the second internal space. The second valve body is installed on the fuel tank, and the second internal space communicates with the fuel storage space;
[0018] The second valve core is used to close the passage between the second internal space and the first opening when the liquid level in the fuel storage space is higher than a second preset height.
[0019] Another embodiment of the present invention further provides a vehicle, including the above-mentioned fuel system.
[0020] In the present utility model, when the vehicle is running, the fuel in the fuel storage space sways, causing some fuel with a small amount to enter the liquid collector through the fuel filling cut-off valve and / or the roll-over valve; when the temperature of the fuel in the fuel storage space rises due to an abnormality in the engine exhaust system, some of the oil and gas in the fuel storage space will also flow into the liquid collector through the fuel filling cut-off valve and / or the roll-over valve for temporary storage; the liquid collector can separate the oil and gas into gas and liquid, the liquid can flow back into the fuel storage space through the fuel filling cut-off valve and / or the roll-over valve, and the gas can flow into the engine through the carbon canister. The carbon canister can absorb gases such as carbon dioxide and sulfur dioxide in the gas, thus ensuring the cleanliness of the gas output to the environment. This fuel system can avoid the accident of oil and gas escaping from the fuel tank and ensure the exhaust emission performance of the vehicle. In addition, the structure of this fuel system is simple and the manufacturing cost is low. Brief Description of the Drawings
[0021] The present utility model will be further described below with reference to the drawings and embodiments.
[0022] Figure 1 It is a schematic diagram of a fuel system provided by an embodiment of the present utility model.
[0023] The reference numerals in the specification are as follows:
[0024] 1. Fuel tank; 11. Fuel filling hole; 12. Fuel storage space; 2. Fuel filling cut-off valve; 3. Roll-over valve; 4. Liquid collector; 5. Carbon canister; 6. Filter; 7. Engine; 8. Solenoid valve; 9. Fuel pump; 101. First steam pipe; 102. Second steam pipe; 103. First exhaust pipe; 104. Second exhaust pipe; 105. Intake pipe; 106. Three-way joint; 107. Atmosphere pipe; 108. Outlet pipe; 109. Fuel supply pipe. Detailed Description of the Embodiment
[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0026] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "middle", etc. is the orientation or positional relationship based on the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.
[0027] As Figure 1As shown in the figure, a fuel system provided by the first embodiment of the present utility model includes a fuel tank 1, a refueling cut-off valve 2, a roll-over valve 3, a liquid collector 4, and a carbon canister 5; a refueling hole 11 and an oil storage space 12 communicating with the refueling hole 11 are provided on the fuel tank 1, and the refueling cut-off valve 2 and the roll-over valve 3 are both installed on the fuel tank 1 and extend into the oil storage space 12; it can be understood that both the refueling cut-off valve 2 and the roll-over valve 3 can be welded to the inner wall of the top of the oil storage space 12.
[0028] The first opening of the liquid collector 4 communicates with the refueling cut-off valve 2 and the roll-over valve 3, and the second opening of the liquid collector 4 communicates with the refueling hole 11 and the adsorption port of the carbon canister 5; it can be understood that the first opening of the liquid collector 4 can communicate with the oil storage space 12 through the refueling cut-off valve 2, or can communicate with the oil storage space 12 through the roll-over valve 3.
[0029] The refueling cut-off valve 2 is used to close the passage between the refueling cut-off valve 2 and the first opening when the liquid level in the oil storage space 12 is higher than a first preset height; the roll-over valve 3 is used to close the passage between the roll-over valve 3 and the first opening when the liquid level in the oil storage space 12 is higher than a second preset height; wherein, the first preset height is less than the second preset height. It can be understood that both the first preset height and the second preset height can be set according to actual needs. It should be noted that the specific structures of the refueling cut-off valve 2 and the roll-over valve 3 are well known to those skilled in the art of the present technology, and will not be elaborated here.
[0030] Specifically, during the process of adding fuel into the oil storage space 12 through the refueling hole 11, the oil and gas in the oil storage space 12 will flow back to the refueling hole 11 through the refueling cut-off valve 2 and the carbon canister 5. When the fuel liquid level in the oil storage space 12 is greater than the first preset height, the refueling cut-off valve 2 is in a closed state (the roll-over valve 3 is in a conducting state), and the gas in the oil storage space 12 will not enter the intake hole through the refueling cut-off valve 2 and the liquid collector 4, and the air pressures in the oil storage space 12 and the refueling hole 11 will rise, and the fueling gun will automatically close due to the rise of the fuel pressure in the fuel tank 1, and the fueling gun stops adding fuel into the fuel tank 1.
[0031] When a part of the fuel in the oil storage space 12 is consumed and the liquid level height in the oil storage space 12 is lower than the first preset height, the refueling cut-off valve 2 is in a conducting state, so as to ensure the normal fueling volume of the fuel tank 1 for the next time.
[0032] Further, when the vehicle is driving normally, the roll - over valve 3 is in a conducting state, and the fuel filling cut - off valve 2 can be in a conducting state or a closed state; when an accident such as a roll - over occurs to the vehicle, the oil in the oil storage space 12 is higher than the second preset height, the roll - over valve 3 is in a closed state, and the fuel filling cut - off valve 2 is also in a closed state, thus avoiding the accident of oil leakage from the fuel tank 1 due to accidents such as roll - overs.
[0033] During driving, the fuel in the oil storage space 12 shakes, causing some fuel with a small amount to enter the liquid collector 4 through the fuel filling cut - off valve 2 and / or the roll - over valve 3; when the temperature of the oil in the oil storage space 12 rises due to an abnormality in the exhaust system of the engine 7, some oil and gas in the oil storage space 12 also flow into the liquid collector 4 through the fuel filling cut - off valve 2 and / or the roll - over valve 3 for temporary storage; the liquid collector 4 can separate the oil and gas into gas and liquid. The liquid can flow back to the oil storage space 12 through the fuel filling cut - off valve 2 and / or the roll - over valve 3, and the gas can flow into the engine 7 through the carbon canister. The carbon canister 5 can absorb gases such as carbon dioxide and sulfur dioxide in the gas, thus ensuring the cleanliness of the gas output to the environment. This fuel system can avoid the accident of oil and gas escaping from the fuel tank 1 and ensure the exhaust emission performance of the vehicle. In addition, the structure of this fuel system is simple and the manufacturing cost is low.
[0034] In one embodiment, as Figure 1 shown, the fuel system further includes a first steam pipe 101 and a second steam pipe 102. The opposite ends of the first steam pipe 101 are respectively connected to the fuel filling cut - off valve 2 and the first opening of the liquid collector 4, and the opposite ends of the second steam pipe 102 are respectively connected to the roll - over valve 3 and the first opening of the liquid collector 4. It can be understood that when the fuel filling cut - off valve 2 is in a closed state, the first steam pipe 101 is not connected to the oil storage space 12; when the fuel filling cut - off valve 2 is in a conducting state, the first steam pipe 101 is connected to the oil storage space 12. When the roll - over valve 3 is in a closed state, the second steam pipe 102 is not connected to the oil storage space 12; when the roll - over valve 3 is in a conducting state, the second steam pipe 102 is connected to the oil storage space 12. In this embodiment, the first steam pipe 101 facilitates the connection between the liquid collector 4 and the fuel filling cut - off valve 2; the design of the second steam pipe 102 facilitates the connection between the liquid collector 4 and the roll - over valve 3.
[0035] In one embodiment, as Figure 1As shown, the fuel system further includes a first exhaust pipe 103, a second exhaust pipe 104, an intake pipe 105, and a tee joint 106. The first exhaust pipe 103, the second exhaust pipe 104, and the intake pipe 105 are respectively connected to three interfaces of the tee joint 106. Understandably, the first exhaust pipe 103, the second exhaust pipe 104, and the intake pipe 105 are respectively connected to the first interface, the second interface, and the third interface of the tee joint 106.
[0036] One end of the first exhaust pipe 103 away from the tee joint 106 is connected to the second opening of the liquid collector 4. One end of the second exhaust pipe 104 away from the tee joint 106 is connected to the fuel filling hole 11. One end of the intake pipe 105 away from the tee joint 106 is connected to the adsorption port of the carbon canister 5.
[0037] Specifically, the gas in the liquid collector 4 can flow into the fuel filling hole 11 through the first exhaust pipe 103, the tee joint 106, and the second exhaust pipe 104. The gas in the liquid collector 4 can also flow into the carbon canister 5 through the first exhaust pipe 103 and the intake pipe 105. In this embodiment, the structure of the fuel system is simple and the manufacturing cost is low.
[0038] In one embodiment, the inner diameter of the first exhaust pipe 103 is greater than or equal to 11 mm (for example, 12 mm, 13 mm, 14 mm, etc.). The inner diameter of the second exhaust pipe 104 is greater than or equal to 11 mm (for example, 12 mm, 13 mm, 14 mm, etc.). Understandably, the inner diameters of the first exhaust pipe 103 and the second exhaust pipe 104 are relatively low, thus ensuring the smoothness of the oil and gas in the oil storage space 12 flowing into the fuel filling hole 11 through the first exhaust pipe 103 and the second exhaust pipe 104, and further ensuring the smoothness of refueling of the fuel tank 1.
[0039] In one embodiment, the inner diameter of the intake pipe 105 is 4 mm to 8 mm (for example, 5 mm, 6 mm, 7 mm, etc.).
[0040] In one embodiment, as Figure 1 As shown, the fuel system further includes an air pipe 107 and a filter 6. Opposite ends of the air pipe 107 are respectively connected to the filter 6 and the air interface of the carbon canister 5. Understandably, external gas can flow into the carbon canister 5 through the filter 6 and the air pipe 107, and the filter 6 can ensure the cleanliness of the external gas flowing into the carbon canister 5.
[0041] In one embodiment, as Figure 1As shown, the fuel system further includes an outlet pipe 108 and an engine 7. The opposite ends of the outlet pipe 108 are respectively connected to the intake port of the engine 7 and the desorption port of the carbon canister 5. Preferably, the fuel system further includes a solenoid valve 8 installed on the outlet pipe 108, and the solenoid valve 8 is used to control the on-off of the outlet pipe 108.
[0042] Specifically, when the engine management system detects that its relevant conditions are met, it controls the solenoid valve 8 to conduct. The intake system of the engine 7 will generate a negative pressure in the carbon canister 5 through the outlet pipe 108. The carbon canister 5 will suck in external air through the atmosphere pipe 107 and the filter 6, thereby realizing the regeneration of the working ability of the carbon powder in the carbon canister 5 and preventing oil and gas from leaking into the external environment.
[0043] In one embodiment, as Figure 1 shown, the fuel system further includes a fuel pump 9 and a fuel supply pipe 109. The opposite ends of the fuel supply pipe 109 are respectively connected to the oil storage space 12 and the fuel inlet of the engine 7; the fuel pump 9 is connected to the fuel supply pipe 109 and is used to input the fuel in the oil storage space 12 into the fuel inlet of the engine 7 through the fuel supply pipe 109. It can be understood that the fuel pump 9 can extract the fuel in the oil storage space 12 and input it into the engine 7 through the fuel supply pipe 109 for combustion.
[0044] In one embodiment, as Figure 1 shown, the fuel pump 9 is installed in the oil storage space 12. The inlet of the fuel pump 9 is connected to the oil storage space 12, and the outlet of the fuel supply pump is connected to one end of the fuel supply pipe 109 away from the engine 7. In this embodiment, the fuel pump 9 is integrated inside the fuel tank 1, avoiding the intrusion of the external environment on the fuel pump 9, prolonging the service life of the fuel pump 9, and improving the integration degree of the fuel tank 1.
[0045] In one embodiment, the fuel filling cut-off valve 2 includes a first valve body (not shown in the figure) provided with a first internal space and a first valve core (not shown in the figure) installed in the first internal space. The first valve body is installed on the fuel tank 1, and the first internal space is connected to the oil storage space 12; the first valve core is used to close the passage between the first internal space and the first opening when the liquid level in the oil storage space 12 is higher than the first preset height; it can be understood that the first valve body can be installed in the oil storage space 12, and the fuel in the oil storage space 12 can enter the first internal space.
[0046] Specifically, when the liquid level of the fuel in the oil storage space 12 is higher than the first preset height, due to buoyancy and other reasons, the first valve core causes the fuel filling cut-off valve 2 to be in a closed state. At this time, the passage between the first internal space and the first opening is in a closed state, and the oil and gas, fuel, etc. in the oil storage space 12 cannot flow into the liquid collector 4 through the fuel filling cut-off valve 2.
[0047] The rollover valve 3 includes a second valve body (not shown in the figure) provided with a second internal space and a second valve core (not shown in the figure) installed in the second internal space. The second valve body is installed on the fuel tank 1, and the second internal space communicates with the oil storage space 12; the second valve core is used to close the passage between the second internal space and the first opening when the liquid level in the oil storage space 12 is higher than the second preset height. It can be understood that the second valve body can be installed in the oil storage space 12, and the fuel in the oil storage space 12 can enter the second internal space.
[0048] Specifically, when the liquid level of the fuel in the oil storage space 12 is higher than the second preset height, due to buoyancy and other reasons, the second valve core causes the rollover valve 3 to be in a closed state. At this time, the passage between the second internal space and the first opening is in a closed state, and the oil and gas, fuel, etc. in the oil storage space 12 cannot flow into the liquid collector 4 through the rollover valve 3.
[0049] In summary, the working principle of this fuel system is as follows:
[0050] During the process of adding fuel into the oil storage space 12 through the fuel filling hole 11, the oil and gas in the oil storage space 12 will flow back to the fuel filling hole 11 through the fuel filling cut-off valve 2 and the carbon canister. When the liquid level of the fuel in the oil storage space is higher than the first preset height, the first valve core controls the fuel filling cut-off valve 2 to be in a closed state (the rollover valve 3 is in a conducting state), and the gas in the oil storage space 12 will not enter the intake hole through the fuel filling cut-off valve 2 and the liquid collector 4. The air pressures in the oil storage space 12 and the fuel filling hole 11 will rise, and the fuel gun will automatically close due to the rising air pressure in the fuel filling hole 11, and the fuel gun will stop adding fuel into the fuel tank 1.
[0051] When a part of the fuel in the oil storage space 12 is consumed and the liquid level of the fuel in the oil storage space 12 is lower than the first preset height, due to the action of gravity, the first valve core will automatically descend to make the fuel filling cut-off valve 2 in a conducting state, so as to ensure the normal fuel filling amount for the next time of the fuel tank 1.
[0052] When the engine 7 does not start and the temperature in the fuel storage space 12 rises, the oil and gas in the fuel storage space 12 will enter the liquid-gas separator 4 through the refueling cut-off valve 2 and / or the rollover valve 3. The liquid-gas separator 4 can separate the oil and gas into gas and liquid. The liquid can flow back to the fuel storage space 12 through the refueling cut-off valve 2 and / or the rollover valve 3, and the gas can be discharged into the engine 7 through the charcoal canister. When the engine 7 does not start and the temperature in the fuel storage space 12 drops, the outside air flows into the charcoal canister 5 through the filter 6 and the atmosphere pipe 107. The gas in the charcoal canister 5 enters the fuel storage space 12 through the intake pipe 105, the tee joint 106, the first exhaust pipe 103, the liquid-gas separator 4, the first vapor pipe 101 and the refueling cut-off valve 2, so as to supplement the negative pressure in the fuel storage space 12.
[0053] During driving, the fuel in the fuel storage space 12 shakes, causing some fuel to enter the liquid-gas separator 4 through the refueling cut-off valve 2 and / or the rollover valve 3 with a small amount of fuel carried. When the vehicle is driving smoothly or after parking, the oil and gas in the liquid-gas separator 4 will return to the fuel storage space 12 through the refueling cut-off valve 2 and / or the rollover valve 3. When the temperature of the oil in the fuel storage space 12 rises due to an abnormality in the exhaust system of the engine 7, some of the oil and gas in the fuel storage space 12 will also flow into the liquid-gas separator 4 through the refueling cut-off valve 2 and / or the rollover valve 3 for temporary storage. When the engine 7 management system detects that its relevant conditions are met, it controls the solenoid valve 8 to conduct. The intake system of the engine 7 will generate a negative pressure in the charcoal canister 5 through the outlet pipe 108. The charcoal canister 5 will suck in outside air through the atmosphere pipe 107 and the filter 6, thereby realizing the regeneration of the working ability of the charcoal powder in the charcoal canister 5 and preventing oil and gas from leaking into the external environment.
[0054] Another embodiment of the present invention further provides a vehicle, including the above fuel system.
[0055] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A fuel system, characterized in that, It includes a fuel tank, a refueling cut-off valve, a roll-over valve, a liquid collector, and a carbon canister; a refueling hole and a storage space communicating with the refueling hole are provided on the fuel tank, and the refueling cut-off valve and the roll-over valve are both installed on the fuel tank and extend into the storage space; The first opening of the liquid collector communicates with the refueling cut-off valve and the roll-over valve, and the second opening of the liquid collector communicates with the refueling hole and the adsorption port of the carbon canister; The refueling cut-off valve is used to close the passage between the refueling cut-off valve and the first opening when the liquid level in the storage space is higher than a first preset height; the roll-over valve is used to close the passage between the roll-over valve and the first opening when the liquid level in the storage space is higher than a second preset height; wherein, the first preset height is less than the second preset height.
2. The fuel system according to claim 1, characterized in that, The fuel system further includes a first vapor pipe and a second vapor pipe, and the opposite ends of the first vapor pipe communicate with the refueling cut-off valve and the first opening of the liquid collector respectively, and the opposite ends of the second vapor pipe communicate with the roll-over valve and the first opening of the liquid collector respectively.
3. The fuel system according to claim 1, characterized in that, The fuel system further includes a first exhaust pipe, a second exhaust pipe, an intake pipe, and a tee joint, and the first exhaust pipe, the second exhaust pipe, and the intake pipe communicate with three interfaces of the tee joint respectively; One end of the first exhaust pipe away from the tee joint communicates with the second opening of the liquid collector, one end of the second exhaust pipe away from the tee joint communicates with the refueling hole, and one end of the intake pipe away from the tee joint communicates with the adsorption port of the carbon canister.
4. The fuel system according to claim 3, characterized in that, The inner diameter of the first exhaust pipe is greater than or equal to 11 mm; and / or The inner diameter of the second exhaust pipe is greater than or equal to 11 mm.
5. The fuel system according to claim 1, wherein The fuel system further includes an air pipe and a filter; the opposite ends of the air pipe communicate with the filter and the air interface of the carbon canister respectively.
6. The fuel system according to claim 1, characterized in that The fuel system further includes an outlet pipe and an engine, and the opposite ends of the outlet pipe communicate with the intake port of the engine and the desorption port of the carbon canister respectively.
7. The fuel system according to claim 6, characterized in that, The fuel system further includes a solenoid valve installed on the outlet pipe, and the solenoid valve is used to control the on-off of the outlet pipe.
8. The fuel system according to claim 6, wherein The fuel system further includes a fuel pump and a fuel supply pipe, and the opposite ends of the fuel supply pipe communicate with the storage space and the fuel inlet of the engine respectively; the fuel pump is connected to the fuel supply pipe and is used to input the fuel in the storage space into the fuel inlet of the engine through the fuel supply pipe.
9. The fuel system according to claim 1, characterized in that, The refueling cut-off valve includes a first valve body having a first internal space and a first valve core installed in the first internal space, the first valve body is installed on the fuel tank, and the first internal space communicates with the storage space; the first valve core is used to close the passage between the first internal space and the first opening when the liquid level in the storage space is higher than a first preset height; and / or The roll-over valve includes a second valve body having a second internal space and a second valve core installed in the second internal space, the second valve body is installed on the fuel tank, and the second internal space communicates with the storage space; The second spool valve is configured to close the passage between the second internal space and the first opening when the liquid level in the oil storage space is higher than a second preset height.
10. A vehicle, characterized in that, A fuel system comprising the fuel system according to any one of claims 1 to 9.