Carbon canister and automobile fuel system arrangement structure
By designing a carbon canister that includes a circulation pipe connection, the problem in the prior art that the high ventilation resistance of the carbon canister causes excessive pressure in the fuel tank is solved, the efficiency of gas discharge when filling fuel is improved, and the refueling gun is prevented from jumping in advance. Gun situation.
Patent Information
- Application Number
- CN202421057727.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-15
AI Technical Summary
In the existing automobile fuel system, the ventilation resistance of the charcoal tank is too large, which causes the fuel vapor and air in the fuel tank to be discharged in time when filling the fuel, resulting in excessive pressure in the fuel tank, and the refueling gun jumps off the gun in advance.
Design a carbon canister, including an adsorption port, a desorption port, a ventilation port and a circulation port on the shell. Both ends of the circulation pipe are connected to the carbon canister and the refueling pipe respectively. Through the circulation pipe, the amount of air in the carbon canister is reduced under the action of negative pressure. The ventilation resistance of fuel vapor and air increases the speed of gas passing through the carbon canister.
It effectively reduces the ventilation resistance of fuel vapor and air in the carbon canister, speeds up the speed of gas passing through the carbon canister, avoids excessive air pressure in the fuel tank, and thus avoids the situation of the gun jumping in advance when filling fuel.
Smart Images
Figure CN222376604U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automobiles, and in particular relates to a charcoal canister and an automobile fuel system arrangement structure. Background Art
[0002] In the prior art, the automobile fuel system includes a charcoal canister, a filling pipe, a fuel tank assembly, a fuel pump, and connecting pipes, etc. When refueling, the fuel flows out of the refueling gun, enters the fuel tank through the filling pipe and the ICV valve, and the gas inside the fuel tank enters the charcoal canister through the adsorption pipe through the FLVV / GVV valve. The fuel vapor is completely adsorbed by the adsorption of the activated carbon in the charcoal canister, and the clean air is discharged through the ash filter through the ventilation pipe. During the refueling process, the upper end of the filling pipe forms a negative pressure under the action of suction. Since the two ends of the circulation pipe are respectively connected to the upper end of the filling pipe and the adsorption pipe, part of the fuel vapor in the adsorption pipe enters the upper end of the filling pipe through the circulation pipe due to the suction of the filling pipe mouth, and then enters the fuel tank, so as to reduce the emission of fuel vapor.
[0003] During the refueling process, the fuel gun sometimes jumps out prematurely, causing trouble for refueling the fuel tank. In addition to the design of the fuel pipe direction, another reason that affects the premature jump of the fuel gun is that the ventilation resistance of the charcoal canister is too large, resulting in the fuel vapor and air in the fuel tank not being discharged in time during the refueling process, causing the pressure in the fuel tank to be too high, which in turn causes the fuel gun to jump out prematurely. Summary of the invention
[0004] The utility model aims to provide a layout structure of an automobile fuel system, so as to overcome the defect in the prior art that the ventilation resistance of a carbon canister is large when the fuel tank is filled with fuel.
[0005] The utility model is realized by adopting the following technical scheme: a carbon canister comprises a carbon canister body, wherein the carbon canister body comprises a shell, an adsorption port, a desorption port and a vent are sequentially mounted on the shell, and a circulation port is also mounted on the shell.
[0006] Furthermore, the adsorption port, the desorption port and the vent are all installed at the front end of the shell, and the circulation port is installed at the rear end of the shell.
[0007] Furthermore, an activated carbon cavity is provided in the shell, and the activated carbon cavity is filled with activated carbon. The shell installs a pressure plate on the rear side of the activated carbon cavity, and the pressure plate is provided with perforations. Non-woven fabric is installed on the front side of the pressure plate, and the circulation port is connected to the rear end of the activated carbon cavity; the circulation port and the adsorption port are respectively on both sides of the activated carbon cavity.
[0008] Furthermore, a partition is installed in the activated carbon cavity, the adsorption port and the desorption port are on one side of the partition, the vent is on the other side of the partition, there is a gap between the rear end of the partition and the rear end of the activated carbon cavity, pressure plates are respectively installed on both sides of the partition, and non-woven fabrics are installed on the front sides of the pressure plates on both sides.
[0009] Furthermore, a spring is installed between the pressure plate and the rear end of the activated carbon chamber.
[0010] A vehicle fuel system layout structure includes a refueling pipe connected to a fuel tank, and also includes the above-mentioned charcoal canister, wherein the fuel tank is connected to an adsorption port of a charcoal canister body through an adsorption pipe, the circulation port is connected to one end of a circulation pipe, and the other end of the circulation pipe is connected to the upper part of the refueling pipe.
[0011] Furthermore, the desorption port of the carbon canister body is connected to a desorption pipe, and the desorption pipe is connected to the engine.
[0012] Furthermore, the vent of the carbon canister body is connected to a vent pipe, and the vent pipe is connected to an ash filter.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The utility model connects the two ends of the circulation pipe to the charcoal canister and the filling pipe respectively, which changes the situation in the prior art that the two ends of the circulation pipe are connected to the adsorption pipe and the filling pipe respectively. When the fuel tank is filled with fuel, the upper part of the filling pipe forms a negative pressure under the suction effect, and acts on the charcoal canister through the circulation pipe. The circulation pipe can effectively reduce the ventilation resistance of the fuel vapor and air in the charcoal canister when passing through the activated carbon cavity under the action of negative pressure, effectively speeding up the speed of the gas entering the vent through the charcoal canister, so that the gas in the fuel tank is discharged as soon as possible, avoiding the situation that the gas pressure in the fuel tank is too high during the process of filling the fuel, and thus effectively avoiding the situation that the gun jumps prematurely when filling the fuel. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional diagram of the carbon canister of the utility model;
[0016] Figure 2 This is a partial cross-sectional view of the carbon canister of the utility model.
[0017] Figure 3 It is a schematic diagram of the layout structure of the automobile fuel system in the prior art;
[0018] Figure 4 It is a schematic diagram of the layout structure of the automobile fuel system in the utility model.
[0019] In the figure: 1. Carbon canister body; 2. Shell; 3. Adsorption port; 4. Desorption port; 5. Vent port; 6. Circulation port; 7. Activated carbon chamber; 8. Pressure plate; 9. Non-woven fabric; 10. Spring; 11. Fuel pipe; 12. Fuel tank; 13. Adsorption tube; 14. Circulation pipe; 15. Desorption tube; 16. Engine; 17. Vent pipe; 18. Ash filter; 19. Partition plate; 20. Gap; 21. Fuel supply pipe. DETAILED DESCRIPTION
[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0021] A carbon canister comprises a carbon canister body 1, wherein the carbon canister body 1 comprises a shell 2, on which an adsorption port 3, a desorption port 4, a vent 5 and a circulation port 6 are sequentially mounted, wherein the circulation port 6 and the adsorption port 3 are respectively located on both sides of an activated carbon cavity 7 in the shell 2, further, the adsorption port 3, the desorption port 4 and the vent 5 are sequentially mounted at the front end of the shell 2, and the circulation port 6 is mounted at the rear end of the shell 2.
[0022] An activated carbon chamber 7 is provided in the shell 2, and the activated carbon chamber 7 is filled with activated carbon. A pressing plate 8 is installed on the rear side of the activated carbon chamber 7 of the shell 2, and a perforation is provided on the pressing plate 8. A non-woven fabric 9 is installed on the front side of the pressing plate 8. The circulation port 6 is connected to the rear end of the activated carbon chamber 7, and a spring 10 is installed between the pressing plate 8 and the rear end of the activated carbon chamber 7.
[0023] A partition 19 is installed in the activated carbon chamber 7, the adsorption port 3 and the desorption port 4 are on one side of the partition 19, and the vent 5 is on the other side of the partition 19. A gap 20 is provided between the rear end of the partition 19 and the rear end of the activated carbon chamber 7, and the gap 20 ensures that air and fuel vapor can flow from one side of the partition 19 to the other side. Pressing plates 8 are respectively installed on both sides of the partition 19, and springs 10 are installed between the pressing plates on both sides and the rear end of the activated carbon chamber 7. Non-woven fabrics are installed on the front sides of the pressing plates 8 on both sides. The partition 19 divides the activated carbon chamber 7 into two chambers, and the two chambers are connected through the gap 20. The adsorption port 3 and the desorption port 4 are in one chamber, and the vent 5 is in the other chamber.
[0024] The adsorption port 3 of the utility model is connected to one end of the adsorption tube 13, and the other end of the adsorption tube 13 is connected to the fuel tank 12. The fuel vapor and air in the fuel tank 12 enter the carbon canister body 1 through the adsorption tube 13. When the fuel vapor passes through the activated carbon chamber 7, it will be adsorbed by the activated carbon in the activated carbon chamber 7. After passing through the activated carbon chamber 7, the air enters the vent 5. The vent 5 is connected to the ash filter 18 through the vent pipe 17. The air is discharged from the carbon canister after being filtered by the ash filter 18 or the air enters the carbon canister after passing through the ash filter 18. The desorption port 4 is connected to the desorption tube 15, and the fuel in the carbon canister body 1 is transported to the engine 16 through the desorption tube 15. The circulation port 6 is connected to the circulation tube 14, and the other end of the circulation tube 14 is connected to the upper part of the refueling pipe 11.
[0025] The pressing plate 8 of the utility model compresses the activated carbon particles in the activated carbon chamber 7 through the spring 10, and the circulation port 6 is connected to the rear end of the activated carbon chamber 7, so that the circulation pipe 14 is connected to the rear end of the activated carbon chamber 7. The non-woven fabric 9 is a breathable material that allows air or fuel vapor to pass through. It can prevent the activated carbon from passing through while ensuring air permeability, thereby preventing the activated carbon from entering the space between the pressing plate 8 and the rear end of the activated carbon chamber 7. At the same time, the perforations on the pressing plate 8 also ensure that air or fuel vapor can pass through.
[0026] A vehicle fuel system layout structure includes a refueling pipe 11, wherein the refueling pipe 11 is connected to a fuel tank 12, and also includes the above-mentioned charcoal canister, wherein the fuel tank 12 is connected to an adsorption port 3 of a charcoal canister body 1 through an adsorption pipe 13, the circulation port 6 is connected to one end of a circulation pipe 14, and the other end of the circulation pipe 14 is connected to the upper part of the refueling pipe 11.
[0027] The utility model connects the two ends of the circulation pipe 14 to the charcoal canister and the filling pipe 11 respectively. When the fuel tank 12 is filled with fuel through the filling pipe 11, the upper part of the filling pipe 11 forms a negative pressure under the action of suction, and acts on the charcoal canister through the circulation pipe 14. The circulation pipe 14 can effectively reduce the ventilation resistance of the fuel vapor and air in the charcoal canister when passing through the activated carbon chamber 7 under the action of negative pressure, and effectively accelerates the speed of the gas entering the vent 5 through the activated carbon chamber 7 in the charcoal canister, so that the air in the fuel tank 12 can be discharged as soon as possible, avoiding the situation that the air in the fuel tank 12 is not discharged in time and the air pressure is too high during the process of filling the fuel tank 12, thereby effectively avoiding the situation that the gun jumps prematurely when filling the fuel. When the circulation pipe 14 acts on the activated carbon chamber 7 through the negative pressure, the air and fuel vapor passing through the non-woven fabric 9 and the pressure plate 8 will be partially sucked into the filling pipe 11 by the circulation pipe 14.
[0028] The desorption port 4 of the canister body 1 is connected to the desorption pipe 15 , the desorption pipe 15 is connected to the engine 16 , the vent port 5 of the canister body 1 is connected to the vent pipe 17 , the vent pipe 17 is connected to the ash filter 18 ; the fuel tank 12 is connected to the engine 16 via the fuel supply pipe 21 .
Claims
1. A carbon canister, comprising a carbon canister body (1), wherein the carbon canister body (1) comprises a shell (2), an adsorption port (3), a desorption port (4) and a vent (5) are sequentially mounted on the shell (2), wherein: A circulation port (6) is also installed on the housing (2).
2. A carbon canister according to claim 1, characterized in that: The adsorption port (3), the desorption port (4) and the vent port (5) are all installed at the front end of the shell (2), and the circulation port (6) is installed at the rear end of the shell (2).
3. A carbon canister according to claim 1, characterized in that: An activated carbon chamber (7) is provided in the shell (2), and the activated carbon chamber (7) is filled with activated carbon. A pressing plate (8) is installed on the rear side of the activated carbon chamber (7) of the shell (2), and a perforation is provided on the pressing plate (8). A non-woven fabric (9) is installed on the front side of the pressing plate (8). The circulation port (6) is connected to the rear end of the activated carbon chamber (7); and the circulation port (6) and the adsorption port (3) are respectively located on both sides of the activated carbon chamber (7).
4. A carbon canister according to claim 3, characterized in that: A partition (19) is installed in the activated carbon chamber (7), the adsorption port (3) and the desorption port (4) are located on one side of the partition (19), the vent (5) is located on the other side of the partition (19), a gap (20) is provided between the rear end of the partition (19) and the rear end of the activated carbon chamber (7), pressing plates (8) are respectively installed on both sides of the partition (19), and non-woven fabrics (9) are installed on the front sides of the pressing plates (8) on both sides.
5. A carbon canister according to claim 3, characterized in that: A spring (10) is installed between the pressure plate (8) and the rear end of the activated carbon chamber (7).
6. An automobile fuel system arrangement structure, comprising a fuel filling pipe (11), wherein the fuel filling pipe (11) is connected to a fuel tank (12), characterized in that: It also includes a carbon canister as claimed in any one of claims 1 to 5, wherein the fuel tank (12) is connected to the adsorption port (3) of the carbon canister body (1) via an adsorption tube (13), the circulation port (6) is connected to one end of a circulation tube (14), and the other end of the circulation tube (14) is connected to the upper part of the refueling pipe (11).
7. The automobile fuel system arrangement structure according to claim 6, characterized in that: The desorption port (4) of the carbon canister body (1) is connected to a desorption pipe (15), and the desorption pipe (15) is connected to an engine (16).
8. The automobile fuel system arrangement structure according to claim 6, characterized in that: The vent (5) of the carbon canister body (1) is connected to a vent pipe (17), and the vent pipe (17) is connected to an ash filter (18).