Automobile fuel system

Abstract

An automobile fuel system comprises a fuel tank (10), a carbon tank (20) and a liquid collecting box (30). The fuel tank is used for storing fuel and has a vertical direction (H) parallel to the gravity direction during installation. The carbon tank is used for absorbing fuel steam. The liquid collecting box is arranged at the top of the fuel tank in the vertical direction, a labyrinth cavity (32), an air inlet (34) and an air outlet (35) are formed in the liquid collecting box, the air inlet and the air outlet are communicated with the labyrinth cavity, the air inlet is connected with the fuel tank through a pipeline, the air outlet is connected with the carbon tank through a pipeline, and the air inlet is lower than the air outlet in the vertical direction. According to the automobile fuel oil system, fuel oil can be prevented from entering the carbon tank when an automobile shakes, and oil gas can be prevented from being discharged into the atmosphere.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an automobile fuel system. Background Art

[0002] With increasingly stringent emissions regulations, existing gasoline-powered vehicles typically have a charcoal canister connected to the vehicle's fuel system intake pipe. The activated carbon inside the canister absorbs evaporated fuel vapors and returns them to the fuel tank, thereby reducing the amount of evaporated fuel vapor released directly into the atmosphere. Off-road vehicles are specifically designed for driving on off-road (no roads) and harsh roads. In the harsh conditions of outdoor adventures, the vehicle experiences greater vehicle sway, causing significant fuel oscillation in the tank and easily pouring directly into the canister through the intake pipe. The canister, however, is susceptible to failure due to the infiltration of large amounts of liquid gasoline, causing evaporated fuel vapors to be released directly into the atmosphere. Utility Model Content

[0003] The utility model aims to provide an automobile fuel system, which can prevent fuel from entering a carbon canister when the automobile is shaken.

[0004] The utility model provides an automobile fuel system, comprising a fuel tank, a carbon canister, and a liquid collecting box. The fuel tank is used to store fuel and has a vertical orientation parallel to the direction of gravity when installed. The carbon canister is used to absorb fuel vapor. The liquid collecting box is vertically disposed on the top of the fuel tank and defines a labyrinth cavity, an air inlet, and an air outlet respectively connected to the labyrinth cavity. The air inlet is connected to the fuel tank via a pipe, and the air outlet is connected to the carbon canister via a pipe, and the air inlet is vertically lower than the air outlet.

[0005] The automobile fuel system provided by this utility model features a liquid collection box positioned between the fuel tank and the carbon canister. When the vehicle is shaken, fuel and oil vapor enter the liquid collection box through the air inlet. The labyrinthine cavity prevents the fuel from passing through, while the oil vapor enters the carbon canister through the air outlet. Once the vehicle stabilizes, the air inlet is vertically lower than the air outlet, allowing the fuel in the liquid collection box to flow back into the fuel tank under the influence of gravity. This prevents fuel from entering the carbon canister and causing oil vapor to be discharged into the atmosphere during vehicle shaking.

[0006] In another exemplary embodiment of an automotive fuel system, a liquid collection box includes a box body and a cover. The box body is hollow and has an opening formed at its top in a vertical direction. The cover is a flat plate that can be positioned perpendicular to the vertical direction to cover the opening, and the cover and the box body form a labyrinthine cavity. This structure is easy to manufacture.

[0007] In another schematic embodiment of an automobile fuel system, the height of a bottom surface of the labyrinth chamber in the vertical direction gradually increases along a first horizontal direction, the first horizontal direction is perpendicular to the vertical direction, and the air inlet and the air outlet are respectively formed at the rear end and the front end of the liquid collecting box along the first horizontal direction.

[0008] In another exemplary embodiment of the automobile fuel system, the air inlet and the air outlet are staggered along a second horizontal direction that is perpendicular to the vertical direction and the first horizontal direction, thereby further preventing the fuel from passing through the liquid collecting box due to inertia.

[0009] In another exemplary embodiment of the automotive fuel system, the liquid collection box further includes a first partition and a second partition. The first partition is disposed parallel to the vertical direction in the labyrinth cavity, on one side of the air inlet along the first horizontal direction, with both ends of the first partition connected to the inner surface of the labyrinth cavity in the vertical direction, one end of the first partition connected to the inner surface of the labyrinth cavity in the second horizontal direction, and the other end of the first partition in the second horizontal direction and the inner surface of the labyrinth cavity enclose a first ventilation gap. The second partition is disposed parallel to the vertical direction in the labyrinth cavity, on one side of the first ventilation gap along the first horizontal direction, with both ends of the second partition connected to the inner surface of the labyrinth cavity in the vertical direction, one end of the second partition connected to the inner surface of the labyrinth cavity in the second horizontal direction, the second partition and the first partition respectively connected to the inner surface of the labyrinth cavity on different sides of the second horizontal direction, and the other end of the second partition in the second horizontal direction and the inner surface of the labyrinth cavity enclose a second ventilation gap.

[0010] In another exemplary embodiment of an automotive fuel system, the liquid collection box further includes an inner pipe and a third partition. The inner pipe is disposed within the labyrinth cavity and connected to the gas outlet at one end. The third partition is disposed within the labyrinth cavity parallel to the vertical direction, connected to the other end of the inner pipe, and covers a portion of the inner pipe near the bottom of the port along the vertical direction.

[0011] In another exemplary embodiment of an automotive fuel system, the automotive fuel system further includes a mounting bracket secured to the vertical top of the fuel tank. The mounting bracket has a plurality of snap-fit ​​holes formed therein. The liquid collection box has a surface formed with a plurality of snaps that are correspondingly inserted into the snap-fit ​​holes and secured therein, thereby facilitating installation of the liquid collection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following drawings are only used to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0013] Figure 1 The figure is a structural diagram of an exemplary embodiment of an automobile fuel system.

[0014] Figure 2 2 is a cross-sectional view of a schematic embodiment of a liquid collecting box.

[0015] Figure 3 This is a schematic diagram of the partial decomposition structure of the automobile fuel system.

[0016] Figure 4 Schematic diagram of the local structure of the liquid collecting box.

[0017] Figure 5 This is a schematic diagram of the partial structure of the automobile fuel system.

[0018] Description of labels

[0019] 10 Fuel tank

[0020] 20 carbon canister

[0021] 30 Liquid collection box

[0022] 31 Box

[0023] 311 buckle

[0024] 32 Labyrinth Cavity

[0025] 33 Cover

[0026] 34 Air Inlet

[0027] 35 air outlet

[0028] 36 First partition

[0029] 361 First ventilation gap

[0030] 37 Second partition

[0031] 371 Second ventilation gap

[0032] 38 inner pipe

[0033] 39 Third partition

[0034] 40 Mounting bracket

[0035] 42 card holes

[0036] H vertical direction

[0037] X first horizontal direction

[0038] Y Second horizontal direction. DETAILED DESCRIPTION

[0039] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings. The same reference numerals in the figures represent components with the same structure or similar structures but the same functions.

[0040] In this document, “illustrative” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “illustrative” should not be interpreted as a more preferred or more advantageous technical solution.

[0041] Figure 1 This is a schematic diagram of a schematic implementation of an automobile fuel system. Figure 1 The automobile fuel system includes a fuel tank 10, a carbon canister 20, and a liquid collecting box 30. The fuel tank 10 is used to store fuel and has a vertical direction H parallel to the direction of gravity when installed. The carbon canister 20 is used to absorb fuel vapor.

[0042] Figure 2 : is a cross-sectional view of a schematic embodiment of a liquid collecting box. Figure 1 and Figure 2 The liquid collecting box 30 is arranged at the top of the fuel tank 10 along the vertical direction H. The liquid collecting box 30 is formed with a labyrinth cavity 32 and an air inlet 34 and an air outlet 35 respectively connected to the labyrinth cavity 32. The air inlet 34 is connected to the fuel tank 10 through a pipeline, and the air outlet 35 is connected to the carbon canister 20 through a pipeline, and the air inlet 34 is lower than the air outlet 35 in the vertical direction H.

[0043] The automobile fuel system provided by this utility model features a liquid collection box 30 disposed between the fuel tank 10 and the carbon canister 20. When the vehicle is shaken, fuel and fuel vapor enter the liquid collection box 30 through the air inlet 34. The fuel is prevented from passing through the labyrinth chamber 32, while fuel vapor can enter the carbon canister 20 through the air outlet 35. Once the vehicle stabilizes, the fuel in the liquid collection box 30 flows back into the fuel tank 10 under the influence of gravity, as the air inlet 34 is lower than the air outlet 35 in the vertical direction H. This prevents fuel from entering the carbon canister and causing fuel vapor to be discharged into the atmosphere during vehicle shaking.

[0044] In an exemplary embodiment, referring to Figure 2 The height of a bottom surface of the labyrinth chamber 32 in the vertical direction H gradually increases along a first horizontal direction X, and the first horizontal direction X is perpendicular to the vertical direction H. The air inlet 34 and the air outlet 35 are respectively formed at the rear end and the front end of the liquid collecting box 30 along the first horizontal direction X.

[0045] Figure 3 This is a partial decomposition diagram of the automobile fuel system. Figure 2 and Figure 3The liquid collection box 30 includes a box body 31 and a cover 33. The box body 31 is hollow and has an opening formed at the top along the vertical direction H. The cover 33 is a flat plate that can cover the opening perpendicular to the vertical direction H. The cover 33 and the box body 31 enclose a labyrinthine cavity 32. This structure facilitates processing and manufacturing.

[0046] Figure 4 This is a partial structural diagram of the liquid collecting box. Figure 4 The cover 33 is hidden in the figure to facilitate viewing of the internal structure of the liquid collecting box 30. The air inlet 34 and the air outlet 35 are staggered along a second horizontal direction Y, which is perpendicular to the vertical direction H and the first horizontal direction X. This further prevents fuel from passing through the liquid collecting box 30 due to inertia.

[0047] In an exemplary embodiment, referring to Figure 4 The liquid collecting box 30 further includes a first partition 36 and a second partition 37. The first partition 36 is disposed in the labyrinth chamber 32 parallel to the vertical direction H. The first partition 36 is located on one side of the air inlet 34 along the first horizontal direction X. Both ends of the first partition 36 in the vertical direction H are connected to the inner surface of the labyrinth chamber 32. One end of the first partition 36 in the second horizontal direction Y is connected to the inner surface of the labyrinth chamber 32. The other end of the first partition 36 in the second horizontal direction Y forms a first ventilation gap 361 with the inner surface of the labyrinth chamber 32.

[0048] The second baffle 37 is disposed within the labyrinth chamber 32 parallel to the vertical direction H. The second baffle 37 is located on one side of the first vent gap 361 along the first horizontal direction X. Both ends of the second baffle 37 in the vertical direction H are connected to the inner surface of the labyrinth chamber 32. One end of the second baffle 37 in the second horizontal direction Y is connected to the inner surface of the labyrinth chamber 32. The second baffle 37 and the first baffle 36 are connected to the inner surface of the labyrinth chamber 32 on different sides in the second horizontal direction Y. The other end of the second baffle 37 in the second horizontal direction Y forms a second vent gap 371 with the inner surface of the labyrinth chamber 32. The first baffle 36 and the second baffle 37 prevent fuel from approaching the gas outlet 35, while allowing fuel vapor to be discharged from the gas outlet 35 into the carbon canister 20 through the first vent gap 361 and the second vent gap 371.

[0049] In an exemplary embodiment, referring to Figure 4The liquid collecting box 30 further includes an inner pipe 38 and a third partition 39. The inner pipe 38 is disposed within the labyrinth chamber 32 and connected to the gas outlet 35 at one end. The third partition 39 is disposed within the labyrinth chamber 32 parallel to the vertical direction H. The third partition 39 connects to the other end of the inner pipe 38 and covers a portion of the inner pipe 38 near the bottom along the vertical direction H. The inner pipe 38 and the third partition 39 further prevent fuel from approaching the gas outlet 35, allowing fuel vapor to be discharged from the gas outlet 35 into the carbon canister 20 through a portion of the inner pipe 38 near the top.

[0050] Figure 5 This is a partial structural diagram of the automobile fuel system. Figure 2 、 Figure 3 and Figure 5 The automobile fuel system also includes a mounting bracket 40, which is fixed to the top of the fuel tank 10 along the vertical direction H. The mounting bracket 40 is formed with a plurality of engaging holes 42. The surface of the liquid collection box 30 is formed with a plurality of clips 311, which are correspondingly inserted into the engaging holes 42 and secured thereto. This facilitates installation of the liquid collection box 30.

[0051] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0052] The series of detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation scheme or changes that do not depart from the technical spirit of the present invention, such as the combination, division or repetition of features, should be included in the scope of protection of the present invention.

Claims

1. Automobile fuel system, characterized in that, include: A fuel tank (10) for storing fuel, wherein the fuel tank (10) has a vertical direction (H) parallel to the direction of gravity when installed; a carbon canister (20) for absorbing fuel vapor; and A liquid collecting box (30) is provided on the top of the fuel tank (10) along the vertical direction (H), the liquid collecting box (30) is formed with a labyrinth cavity (32) and an air inlet (34) and an air outlet (35) respectively connected to the labyrinth cavity (32), the air inlet (34) is connected to the fuel tank (10) through a pipeline, the air outlet (35) is connected to the carbon canister (20) through a pipeline, and the air inlet (34) is lower than the air outlet (35) in the vertical direction (H).

2. The automobile fuel system according to claim 1, wherein: The liquid collecting box (30) comprises: a box body (31) which is hollow and has an opening formed at the top along the vertical direction (H); and A cover body (33) is in the shape of a flat plate. The cover body (33) can cover the opening perpendicular to the vertical direction (H), and the cover body (33) and the box body (31) enclose the labyrinth cavity (32).

3. The automobile fuel system according to claim 1, wherein: The height of a bottom surface of the labyrinth chamber (32) in the vertical direction (H) gradually increases along a first horizontal direction (X), and the first horizontal direction (X) is perpendicular to the vertical direction (H). The air inlet (34) and the air outlet (35) are respectively formed at the rear end and the front end of the liquid collecting box (30) along the first horizontal direction (X).

4. The automobile fuel system according to claim 3, wherein: The air inlet (34) and the air outlet (35) are staggered along a second horizontal direction (Y), and the second horizontal direction (Y) is perpendicular to the vertical direction (H) and the first horizontal direction (X).

5. The automobile fuel system according to claim 4, characterized in that: The liquid collection box (30) further includes: a first baffle (36) arranged in the labyrinth chamber (32) parallel to the vertical direction (H), the first baffle (36) being on one side of the air inlet (34) along the first horizontal direction (X), the first baffle (36) having two ends in the vertical direction (H) connected to the inner surface of the labyrinth chamber (32), one end in the second horizontal direction (Y) connected to the inner surface of the labyrinth chamber (32), and the other end in the second horizontal direction (Y) forming a first ventilation gap (361) with the inner surface of the labyrinth chamber (32); and A second partition (37) is arranged in the labyrinth cavity (32) parallel to the vertical direction (H), the second partition (37) is on one side of the first ventilation gap (361) along the first horizontal direction (X), the two ends of the second partition (37) in the vertical direction (H) are connected to the inner surface of the labyrinth cavity (32), one end of the second partition (37) in the second horizontal direction (Y) is connected to the inner surface of the labyrinth cavity (32), the second partition (37) and the first partition (36) are respectively connected to the inner surface of the labyrinth cavity (32) on different sides in the second horizontal direction (Y), and the other end of the second partition (37) in the second horizontal direction (Y) and the inner surface of the labyrinth cavity (32) form a second ventilation gap (371).

6. The automobile fuel system according to claim 5, wherein: The liquid collection box (30) further includes: an inner pipe (38) disposed in the labyrinth cavity (32) and having one end connected to the air outlet (35); and A third partition (39) is arranged in the labyrinth chamber (32) parallel to the vertical direction (H), the third partition (39) is connected to the other end of the inner pipe (38), and the third partition (39) covers a portion of the port of the inner pipe (38) close to the bottom along the vertical direction (H).

7. The automobile fuel system according to claim 1, wherein: The automobile fuel system further comprises a mounting frame (40) fixed to the top of the fuel tank (10) along the vertical direction (H), and a plurality of snap-fit ​​holes (42) are formed on the mounting frame (40); a plurality of snap-fit ​​buckles (311) are formed on the surface of the liquid collecting box (30), and the snap-fit ​​buckles (311) are inserted into the plurality of snap-fit ​​holes (42) in a one-to-one correspondence and are snap-fitted and fixed.

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