Fuel system and vehicle

Abstract

The utility model discloses a fuel oil system and a vehicle. The fuel oil system comprises a fuel oil tank; the oil filling pipe is connected with the fuel tank; the adsorption pipe is connected with the fuel tank, and the lowest point is arranged between the two ends of the adsorption pipe; the accumulated oil recovery device is respectively connected with the oil filling pipe and the adsorption pipe, and the accumulated oil recovery device is positioned at the downstream of the lowest point of the adsorption pipe along the flowing direction of the oil steam. Therefore, when the fuel tank is used for refueling, by arranging the fuel system, fuel accumulated at the lowest point in the adsorption pipe can be firstly introduced into the accumulated oil recovery device and then flows back to the fuel tank through the refueling pipe connected with the accumulated oil recovery device, so that the problems of failure of a carbon tank and gun jumping during refueling are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a fuel system and a vehicle. Background Art

[0002] In the related art, when designing the fuel system of a vehicle, it is necessary to avoid the lowest point in the refueling exhaust pipe of the refueling pipe, because some oil will usually be stored at the lowest point, causing the refueling gun to jump out of the gun prematurely and the carbon canister to fail during the next refueling. Therefore, in order to avoid the lowest point in the refueling exhaust pipe, traditional vehicles on the market usually adopt a structural form in which the adsorption pipe and the ventilation pipe always have an upward trend. However, due to obstruction from the frame longitudinal beam or the body, if the adsorption pipe and the ventilation pipe are still to be kept in an upward direction, the frame needs to be punched and piped, which makes the process more complicated and the pipeline installation more difficult. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a fuel system, which can first introduce the fuel accumulated at the lowest point in the adsorption tube into the oil accumulation recovery device when refueling the fuel tank, and then flow back to the fuel tank through the refueling pipe connected to the oil accumulation recovery device, thereby solving the problems of carbon canister failure and refueling gun jumping.

[0004] The utility model further provides a vehicle.

[0005] According to the first aspect of the utility model, the fuel system includes: a fuel tank; a refueling pipe, which is connected to the fuel tank; an adsorption tube, which is connected to the fuel tank and has a lowest point between its two ends; an accumulated oil recovery device, which is respectively connected to the refueling pipe and the adsorption tube, and is located downstream of the lowest point of the adsorption tube along the flow direction of oil vapor.

[0006] Therefore, when the fuel tank is refueled, by setting up the fuel system, the fuel accumulated at the lowest point in the adsorption tube can be first introduced into the oil recovery device, and then flowed back to the fuel tank through the refueling pipe connected to the oil recovery device, thereby solving the problems of carbon canister failure and refueling gun jumping.

[0007] In some examples of the present utility model, the adsorption tube includes a first adsorption tube section and a second adsorption tube section, the first adsorption tube section is connected to the fuel tank, and the accumulated oil recovery device also includes: a shell, the shell is respectively connected to the first adsorption tube section and the second adsorption tube section; a first pipeline, the first pipeline is respectively connected to the shell and the refueling pipe.

[0008] In some examples of the present invention, the first pipeline is connected to the bottom of the shell, the first adsorption pipe section is connected to the outer peripheral wall of the shell, and the second adsorption pipe section is connected to the top of the shell.

[0009] In some examples of the present invention, the shell includes: an upper shell portion, the top of which is connected to the second adsorption pipe segment; a middle shell portion, the middle shell portion is connected to the upper shell portion, and the outer peripheral wall of the middle shell portion is connected to the first adsorption pipe segment; a lower shell portion, the lower shell portion is connected to the middle shell portion, and the bottom of the lower shell portion is connected to the first pipeline, and the cross-sectional area of ​​the upper shell portion and the cross-sectional area of ​​the lower shell portion decrease in the direction away from the middle shell portion.

[0010] In some examples of the present invention, a first joint is formed on the top of the upper shell portion, a second joint is formed on the outer wall of the middle shell portion, and a third joint is formed on the bottom of the lower shell portion. The first joint and the third joint are both straight pipe joints, and the second joint is a bent pipe joint.

[0011] In some examples of the present invention, the first pipeline includes a plurality of first sub-pipe segments connected in sequence, and in a direction away from the shell, two adjacent first sub-pipe segments are bent.

[0012] In some examples of the present invention, the accumulated oil recovery device further includes a filter screen, which is disposed in the shell and between the first adsorption pipe section and the second adsorption pipe section.

[0013] In some examples of the present invention, the accumulated oil recovery device further includes a float, which is disposed in the shell and located at an interface where the first pipeline is connected to the shell to selectively block the interface.

[0014] In some examples of the present invention, the accumulated oil recovery device further includes a one-way valve, and the one-way valve is arranged in the first pipeline to prevent the oil in the filling pipe from flowing toward the housing.

[0015] A vehicle according to a second aspect of the utility model comprises: the above-mentioned fuel system.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1It is a structural schematic diagram of a fuel system according to an embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of an accumulated oil recovery device according to an embodiment of the utility model.

[0020] Reference numerals:

[0021] 100. Fuel system;

[0022] 1. fuel tank; 2. refueling pipe; 3. adsorption pipe; 31. first adsorption pipe section; 32. second adsorption pipe section;

[0023] 4. oil recovery device; 41. shell; 411. upper shell; 4111. first joint; 412. middle shell;

[0024] 4121, second joint; 413, lower shell; 4131, third joint; 42, first pipeline;

[0025] 421. First sub-pipe section; 5. Carbon canister. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0027] Reference below Figure 1-Figure 2 The fuel system 100 according to the embodiment of the utility model is described. When refueling the fuel tank 1, the fuel accumulated at the lowest point in the adsorption tube 3 can be first introduced into the oil recovery device 4, and then flowed back to the fuel tank 1 through the refueling pipe 2 connected to the oil recovery device 4, thereby solving the problems of carbon canister 5 failure and refueling gun jumping.

[0028] Combination Figure 1 and Figure 2 As shown, the fuel system 100 according to the embodiment of the first aspect of the utility model includes a fuel tank 1, a filling pipe 2, an adsorption pipe 3 and an accumulated oil recovery device 4, the filling pipe 2 is connected to the fuel tank 1, the adsorption pipe 3 is connected to the fuel tank 1, the adsorption pipe 3 has a lowest point between its two ends, the accumulated oil recovery device 4 is respectively connected to the filling pipe 2 and the adsorption pipe 3, and along the flow direction of the oil vapor, the accumulated oil recovery device 4 is located downstream of the lowest point of the adsorption pipe 3.

[0029] Specifically, the fuel tank 1 is mainly used to provide storage space for fuel; the refueling pipe 2 is connected to the fuel tank 1, so that the user can easily refill the fuel in the fuel tank 1 through the refueling pipe 2; the adsorption tube 3 is connected to the fuel tank 1, and is mainly used to discharge the oil vapor in the fuel tank 1, so as to ensure the actual capacity of the fuel tank 1.

[0030] The adsorption tube 3 extends outward from the shell 41 of the fuel tank 1. In the process of avoiding the longitudinal beam of the frame or the body structure, it cannot be guaranteed to always move upward, so a lowest point is formed between the two sections of the adsorption tube 3. Along the flow direction of the oil vapor, the accumulated oil recovery device 4 is connected to the downstream of the lowest point of the adsorption tube 3, and at the same time, the accumulated oil recovery device 4 is connected to the refueling pipe 2. In this way, when refueling the fuel tank 1, as the oil in the fuel tank 1 increases, the oil vapor is gradually squeezed into the adsorption tube 3, and the oil vapor in the adsorption tube 3 pushes the oil accumulated at the lowest point in the adsorption tube 3 to flow to the downstream accumulated oil recovery device 4. After the accumulated oil reaches the accumulated oil recovery device 4, the accumulated oil flows into the refueling pipe 2 connected to the accumulated oil recovery device 4, and finally flows back to the fuel tank 1, thereby avoiding the risk of the accumulated oil directly flowing into the carbon canister 5 (for example, one end of the adsorption tube 3 is connected to the fuel tank 1, and the other end is usually connected to the carbon canister 5) and causing its failure, and also avoiding the risk of the refueling gun jumping prematurely due to the increase of air pressure in the adsorption tube 3.

[0031] In addition, compared with the traditional design of punching holes in the adsorption tube 3 on the frame to avoid the lowest point in the middle of the exhaust pipe, the embodiment in this case can solve the problem by simply adding an oil recovery device 4, so that the overall manufacturing process is simpler and the pipeline installation is also simpler.

[0032] In particular, along the flow direction of the oil vapor, the oil recovery device 4 is located downstream of the lowest point of the adsorption tube 3. It can be understood that the oil recovery device 4 is arranged on the extension path of the adsorption tube 3. At this time, the oil recovery device 4 is spatially located at a higher position than the lowest point of the adsorption tube 3, and along the gas flow direction in which the oil vapor is squeezed by the increase of fuel in the fuel tank to flow toward the adsorption tube 3, the oil recovery device 4 is located downstream of the lowest point of the adsorption tube 3 (that is, the oil vapor flows to the oil recovery device 4 only after passing the lowest point of the adsorption tube 3).

[0033] Therefore, when the fuel tank 1 is refueled, by setting up the fuel system 100, the fuel accumulated at the lowest point in the adsorption tube 3 can be first introduced into the oil recovery device 4, and then flowed back to the fuel tank 1 through the refueling pipe 2 connected to the oil recovery device 4, thereby solving the problem of failure of the carbon canister 5 and the gun jumping during refueling.

[0034] According to some optional embodiments of the present invention, Figure 1 and Figure 2 As shown, the adsorption tube 3 includes a first adsorption tube section 31 and a second adsorption tube section 32, the first adsorption tube section 31 is connected to the fuel tank 1, and the accumulated oil recovery device 4 also includes a shell 41 and a first pipeline 42, the shell 41 is respectively connected to the first adsorption tube section 31 and the second adsorption tube section 32, and the first pipeline 42 is respectively connected to the shell 41 and the refueling pipe 2.

[0035] For example, the shell 41 of the accumulated oil recovery device 4 is connected to the fuel tank 1 through the first adsorption pipe section 31, and the shell 41 is connected to the carbon canister 5 through the second adsorption pipe section 32. The first pipeline 42 on the accumulated oil recovery device 4 is connected between the shell 41 and the filling pipe 2. In this way, the accumulated oil flowing to the accumulated oil recovery device 4 can flow back to the filling pipe 2 through the first pipeline 42 and finally flow into the fuel tank 1, thereby reducing the loss of oil, avoiding the problem of premature gun jumping caused by the increase in gas pressure between the accumulated oil in the adsorption pipe 3 and the fuel in the fuel tank 1, and preventing the risk of failure caused by the accumulated oil being pushed to the carbon canister 5 along the adsorption pipe 3.

[0036] Specifically, Figure 1 and Figure 2 As shown, the first pipe 42 is connected to the bottom of the shell 41, the first adsorption pipe section 31 is connected to the outer peripheral wall of the shell 41, and the second adsorption pipe section 32 is connected to the top of the shell 41. It can be understood that the accumulated oil at the lowest point in the adsorption tube 3 enters the outer peripheral wall of the shell 41 of the accumulated oil recovery device 4 along the first adsorption pipe section 31, and the first pipe 42 is connected to the bottom of the shell 41, so that the accumulated oil can flow smoothly into the first pipe 42 under the gravity of the accumulated oil itself; the second adsorption pipe section 32 is connected to the top of the shell 41, so that the gas in the first adsorption pipe section 31 does not interfere with the smooth flow of the gas to the second adsorption pipe 3 connected to the top of the accumulated oil recovery device 4, so as to achieve the effect of normal discharge of the gas in the adsorption pipe 3 on the one hand, and on the other hand, it can also prevent the accumulated oil in the first adsorption pipe section 31 from flowing upward (the accumulated oil flowing into the accumulated oil recovery device 4 cannot flow upward under its own gravity) to the first adsorption pipe section 31, which may cause the risk of failure of the carbon canister 5.

[0037] Furthermore, if Figure 1 and Figure 2 As shown, the shell 41 includes an upper shell portion 411, a middle shell portion 412 and a lower shell portion 413. The top of the upper shell portion 411 is connected to the second adsorption pipe segment 32, the middle shell portion 412 is connected to the upper shell portion 411, the outer peripheral wall of the middle shell portion 412 is connected to the first adsorption pipe segment 31, the lower shell portion 413 is connected to the middle shell portion 412, and the bottom of the lower shell portion 413 is connected to the first pipeline 42. The cross-sectional areas of the upper shell portion 411 and the lower shell portion 413 decrease in the direction away from the middle shell portion 412.

[0038] For example, the shell 41 is formed with an upper shell portion 411, a middle shell portion 412 and a lower shell portion 413 in sequence in the up and down directions, and the upper shell portion 411, the middle shell portion 412 and the lower shell portion 413 are connected in sequence from top to bottom, the second adsorption pipe section 32 is interconnected with the top of the upper shell portion 411, the first adsorption pipe section 31 is interconnected with the outer peripheral wall of the middle shell portion 412, and the first pipeline 42 is interconnected with the bottom of the lower shell portion 413, so that the accumulated oil can flow smoothly into the first pipeline 42 under the action of gravity, and the accumulated oil can be prevented from continuing to flow upward into the undesired second adsorption pipe section 32, thereby improving the rationality of its spatial layout.

[0039] In addition, the cross-sectional areas of the upper shell portion 411 and the lower shell portion 413 tend to gradually decrease in the direction away from the middle shell portion 412. This can, on the one hand, have the effect of gathering the accumulated oil at the lower shell portion 413, thereby increasing the rate at which the accumulated oil flows to the first pipeline 42; on the other hand, it can also have the effect of gradually guiding the gas in the adsorption tube 3 to be gathered in the second adsorption tube section 32, thereby increasing the flow rate of the gas.

[0040] Specifically, Figure 1 and Figure 2 As shown, a first joint 4111 is formed at the top of the upper shell portion 411, a second joint 4121 is formed at the outer peripheral wall of the middle shell portion 412, and a third joint 4131 is formed at the bottom of the lower shell portion 413. The first joint 4111 and the third joint 4131 are both straight pipe joints, and the second joint 4121 is a curved pipe joint.

[0041] It can be understood that a first joint 4111 connected to the second adsorption pipe segment 32 is formed on the top of the upper shell portion 411, a second joint 4121 connected to the first adsorption pipe segment 31 is formed on the outer wall of the middle shell portion 412, and a third joint 4131 connected to the first pipeline 42 is formed on the bottom of the lower shell portion 413. This makes it easy to connect the three to their corresponding pipelines respectively, thereby simplifying the installation of the pipelines.

[0042] In addition, the first joint 4111 and the third joint 4131 are both straight pipe joints, which are conducive to the smooth discharge of the gas and accumulated oil in the oil recovery device 4, respectively, and avoid obstruction caused by the curved guide path; the second joint 4121 is a curved pipe joint, which can change the original path extension direction of the first adsorption pipe section 31, so that the first adsorption pipe section 31 can be more smoothly connected to the outer peripheral wall of the middle shell part 412.

[0043] Furthermore, if Figure 1 and Figure 2As shown, the first pipeline 42 includes a plurality of first sub-pipe segments 421 connected in sequence, and in the direction away from the housing 41, two adjacent first sub-pipe segments 421 are bent. In the direction from the housing 41 toward the fuel pipe 2, the plurality of first sub-pipe segments 421 are connected to each other, and the extension direction is continuously changed until they are connected to the fuel pipe 2 in a suitable orientation, so that the outer contour of the fuel pipe 2 can be better matched, thereby improving the connection stability between the first pipeline 42 and the fuel pipe 2 and the smoothness of the flow of the accumulated oil in the first pipeline 42.

[0044] Optionally, the accumulated oil recovery device 4 further includes a filter screen, which is disposed in the housing 41 and is located between the first adsorption pipe section 31 and the second adsorption pipe section 32. It is understandable that the gas flowing into the housing 41 from the first adsorption pipe section 31 must pass through the filter screen before continuing to flow upward to the second adsorption pipe section 32 connected to the housing 41, so that the gas can be further filtered to prevent impurities or oil particles attached to the gas from eventually entering the carbon canister 5 along the second adsorption pipe section 32, thereby improving the service life and oil resistance of the carbon canister 5.

[0045] Alternatively, the accumulated oil recovery device 4 further includes a float, which is disposed in the shell 41 and is located at the interface where the first pipeline 42 and the shell 41 are connected, so as to selectively block the interface. When oil drips in the shell 41, the float will float due to the buoyancy of the oil to achieve the effect of opening the interface, and the oil will flow downward along the interface where the shell 41 and the first pipeline 42 are connected; when the oil runs out, the float will block the interface again due to its own gravity, thereby ensuring that the gas in the shell 41 can flow smoothly from the first adsorption pipe section 31 through the shell 41 and then be discharged into the second adsorption pipe section 32.

[0046] In particular, the accumulated oil recovery device 4 further includes a one-way valve, which is arranged in the first pipeline 42 to prevent the oil in the filling pipe 2 from flowing to the housing 41. In other words, the one-way valve only allows the fluid to pass in one direction, and the oil in the housing 41 can smoothly flow into the filling pipe 2 along the first pipeline 42 through the one-way valve, while the oil in the filling pipe 2 cannot flow into the housing 41 through the first pipeline 42 due to the obstruction of the one-way valve, thereby avoiding the oil backflow phenomenon in the first pipeline 42.

[0047] Specifically, Figure 1 and Figure 2As shown, the lowest point of the first pipeline 42 is located at the connection between the first pipeline 42 and the fuel pipe 2. It can be understood that the lowest point of the first pipeline 42 is the connection between the first pipeline 42 and the fuel pipe 2, and the highest point of the first pipeline 42 is the connection between the first pipeline 42 and the bottom of the shell 41, so that the accumulated oil flowing into the shell 41 can be smoothly flowed from the bottom of the shell 41 through the first pipeline 42 into the fuel pipe 2 under the action of its own gravity, avoiding the phenomenon of backflow of the accumulated oil at the connection between the first pipeline 42 and the fuel pipe 2, thereby increasing the probability that the accumulated oil can smoothly and stably flow into the fuel pipe 2.

[0048] Furthermore, if Figure 1 and Figure 2 As shown, the inner diameters of the first adsorption pipe section 31 and the second adsorption pipe section 32 are both larger than the inner diameter of the first pipeline 42. Among them, the inner diameter of the first adsorption pipe section 31 is larger than the inner diameter of the first pipeline 42, so that the flow cross-sectional area of ​​the accumulated oil from the shell 41 to the refueling pipe 2 can be reduced, thereby accelerating the flow rate of the accumulated oil. In addition, the inner diameter of the second adsorption pipe section 32 is larger than the inner diameter of the first pipeline 42, so that the gas flowing into the second adsorption pipe section 32 can flow more smoothly and slowly, avoiding the problem that the inner diameter of the second adsorption pipe section 32 is too small, the gas cannot be discharged in time, and the pressure increases sharply, which easily causes the refueling gun to jump out early.

[0049] Specifically, Figure 1 and Figure 2 As shown, the lowest point of the adsorption tube 3 is lower than the top of the fuel tank 1, and the shell 41 is higher than the top of the fuel tank 1. It can be understood that the lowest point of the adsorption tube 3 is lower than the top of the fuel tank 1, so that the vehicle body structure near the fuel tank 1 can be avoided; the shell 41 is higher than the top of the fuel tank 1, so that the accumulated oil recovery device 4 can be located at the upper end of the first adsorption tube section 31 and the fuel tank 1, so that the accumulated oil at the lowest point in the adsorption tube 3 can be used by gravity to finally flow back into the fuel tank 1 in the shell 41.

[0050] The vehicle according to the second embodiment of the utility model includes the fuel system 100 of the above embodiment, so that the vehicle with the fuel system 100 can solve the problem of carbon canister 5 failure and refueling gun jumping caused by oil accumulation at the lowest point in the adsorption tube 3 when refueling the fuel tank 1.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fuel system (100), characterized in that: include: Fuel tank (1); A refueling pipe (2), the refueling pipe (2) being connected to the fuel tank (1); An adsorption tube (3), the adsorption tube (3) being connected to the fuel tank (1), the adsorption tube (3) having a lowest point between its two ends; An oil accumulation recovery device (4), the oil accumulation recovery device (4) is connected to the refueling pipe (2) and the adsorption pipe (3) respectively, and along the flow direction of the oil vapor, the oil accumulation recovery device (4) is located downstream of the lowest point of the adsorption pipe (3).

2. The fuel system (100) according to claim 1, characterized in that: The adsorption pipe (3) comprises a first adsorption pipe section (31) and a second adsorption pipe section (32); the first adsorption pipe section (31) is connected to the fuel tank (1); and the accumulated oil recovery device (4) further comprises: A shell (41), wherein the shell (41) is connected to the first adsorption pipe section (31) and the second adsorption pipe section (32) respectively; A first pipeline (42), wherein the first pipeline (42) is connected to the housing (41) and the refueling pipe (2) respectively.

3. The fuel system (100) according to claim 2, characterized in that: The first pipeline (42) is connected to the bottom of the shell (41), the first adsorption pipe section (31) is connected to the outer peripheral wall of the shell (41), and the second adsorption pipe section (32) is connected to the top of the shell (41).

4. The fuel system (100) according to claim 3, characterized in that: The housing (41) comprises: An upper shell portion (411), the top of the upper shell portion (411) being connected to the second adsorption pipe section (32); A middle shell portion (412), the middle shell portion (412) being connected to the upper shell portion (411), and an outer peripheral wall of the middle shell portion (412) being connected to the first adsorption tube segment (31); A lower shell portion (413), the lower shell portion (413) is connected to the middle shell portion (412), the bottom of the lower shell portion (413) is connected to the first pipeline (42), and the cross-sectional area of ​​the upper shell portion (411) and the cross-sectional area of ​​the lower shell portion (413) decrease in a direction away from the middle shell portion (412).

5. The fuel system (100) according to claim 4, characterized in that: A first joint (4111) is formed at the top of the upper shell portion (411), a second joint (4121) is formed on the outer peripheral wall of the middle shell portion (412), and a third joint (4131) is formed at the bottom of the lower shell portion (413); the first joint (4111) and the third joint (4131) are both straight pipe joints, and the second joint (4121) is a curved pipe joint.

6. The fuel system (100) according to claim 2, characterized in that: The first pipeline (42) comprises a plurality of first sub-pipe segments (421) connected in sequence, and in a direction away from the housing (41), two adjacent first sub-pipe segments (421) are bent.

7. The fuel system (100) according to claim 2, characterized in that: The accumulated oil recovery device (4) further comprises a filter screen, which is arranged in the housing (41) and located between the first adsorption pipe section (31) and the second adsorption pipe section (32).

8. The fuel system (100) according to claim 2, characterized in that: The accumulated oil recovery device (4) further comprises a float, which is arranged in the housing (41) and located at the interface where the first pipeline (42) and the housing (41) are connected, so as to selectively block the interface.

9. The fuel system (100) according to claim 2, characterized in that: The accumulated oil recovery device (4) further comprises a one-way valve, which is arranged on the first pipeline (42) to prevent the oil in the filling pipe (2) from flowing toward the housing (41).

10. A vehicle, characterized in that: include: The fuel system (100) according to any one of claims 1 to 9.

Images