Automobile carbon can provided with filter assembly

Abstract

This utility model relates to the field of carbon canister technology, and in particular to a car carbon canister equipped with a filter assembly. It includes a canister body with an adsorption port and a desorption port on both sides of the upper end of the canister body, and an atmospheric vent in the middle of the upper end of the canister body. A filter assembly is detachably mounted on the upper end of the canister body in conjunction with the atmospheric vent. The filter assembly includes a chassis slidably mounted on the upper end of the canister body; a connecting pipe is fixedly mounted in the middle of the chassis; a shell is fitted over the connecting pipe; an air pipe is mounted on the outer wall of the shell; and activated carbon is filled between the shell and the connecting pipe. This design effectively treats the airflow at the atmospheric vent, using activated carbon to adsorb dust in the airflow, preventing dust from being discharged through the atmospheric vent and causing pollution. It also avoids dust accumulation that can clog the adsorption channels inside the carbon canister, ensuring the adsorption efficiency of the activated carbon for fuel vapors and reducing fuel waste caused by decreased adsorption efficiency. Therefore, it effectively solves the pollution, clogging, and fuel waste problems caused by insufficient dust control at the atmospheric vent of existing carbon canisters.

Description

Technical Field

[0001] This utility model relates to the field of carbon canister technology, and in particular to a car carbon canister equipped with a filter assembly. Background Technology

[0002] Automobiles are generally equipped with a core component for handling this type of fuel gas—a carbon canister. The core function of the carbon canister is to first adsorb and store fuel vapors generated in the fuel tank, and then, under suitable engine operating conditions, desorb the adsorbed fuel vapors and introduce them into the engine combustion chamber to participate in combustion, thereby achieving the dual goals of environmental protection and energy conservation. This structure has become a standard configuration in modern automotive fuel systems.

[0003] Existing automotive carbon canisters typically consist of a canister body with an adsorption port, a desorption port, and an vent to the atmosphere. The adsorption port connects to the fuel tank, allowing fuel vapor to enter the canister. The desorption port connects to the engine intake manifold, enabling the recovery and reuse of adsorbed fuel vapor. The vent to the atmosphere balances the internal pressure of the canister during adsorption and desorption, ensuring proper airflow. To adsorb fuel vapor, the canister is usually filled with adsorbent materials such as activated carbon. Some canisters also attempt to incorporate simple airflow guiding structures to optimize the airflow path. However, there is still significant room for improvement in the targeted design for dust control and component maintenance.

[0004] However, existing automotive carbon canisters face two key problems in actual use: First, their vents generally lack effective dust interception and prevention structures. Dust generated during adsorption inside the carbon canister (such as activated carbon wear particles) or dust entering from the outside can easily spread into the environment with the airflow discharged through the vents. This not only causes secondary pollution, but may also cause blockage of the adsorption channels inside the carbon canister due to dust accumulation, reducing the adsorption efficiency of activated carbon for fuel vapor and thus leading to fuel waste. Utility Model Content

[0005] In view of the problem that existing carbon canisters generally lack effective dust interception and prevention structures at the atmospheric vent, this utility model provides an automotive carbon canister equipped with a filter component.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: A car carbon canister equipped with a filter assembly includes a canister body, with an adsorption port and a desorption port respectively provided on both sides of the upper end of the canister body, and an atmospheric vent opened in the middle of the upper end of the canister body. A filter assembly is detachably installed on the upper end of the canister body in conjunction with the atmospheric vent. The filter assembly includes a chassis slidably installed on the upper end of the canister body; a connecting pipe is fixedly installed in the middle of the chassis; a shell is fitted over the connecting pipe; an air pipe is provided on the outer wall of the shell; and activated carbon is filled between the shell and the connecting pipe. This automotive carbon canister filter assembly features a connecting pipe encased in a shell, with activated carbon filling the space between the shell and the connecting pipe. This effectively treats the airflow at the vent, using activated carbon to adsorb dust particles in the airflow, preventing dust from being discharged through the vent and causing pollution. It also prevents dust accumulation from clogging the adsorption channels inside the carbon canister, ensuring the adsorption efficiency of activated carbon for fuel vapors and reducing fuel waste caused by decreased adsorption efficiency. This effectively solves the pollution, blockage, and fuel waste problems caused by insufficient dust control at the vent of existing carbon canisters. Furthermore, the filter assembly is detachably mounted on the upper part of the canister in conjunction with the vent, and the filter assembly uses a sliding chassis, allowing for easy installation and removal of the filter assembly from the canister. This effectively solves the problem of cumbersome replacement and cleaning operations and high maintenance costs associated with fixed installation of filter-related components in existing carbon canisters, significantly improving maintenance convenience.

[0007] Preferably, dovetail platforms are fixedly provided on the bottom surfaces of the left and right sides of the chassis; a groove is provided on the upper end of the tank to match the chassis; and a dovetail groove is provided on the upper end of the tank to match the dovetail platforms. In this automotive carbon canister structure, the dovetail platforms fixed to the bottom surfaces of the left and right sides of the chassis and the dovetail grooves on the upper end of the canister form a sliding fit. Simultaneously, the grooves on the upper end of the canister, aligned with the chassis, ensure pre-positioning during chassis installation. The synergistic effect of these three elements brings multiple benefits: the matching structure of the dovetail platforms and grooves provides stable guidance for the installation and removal of the filter assembly, allowing the chassis to smoothly slide the entire filter assembly along the dovetail grooves; the dovetail structure itself has excellent limiting and anti-detachment performance, and combined with the grooves' fit and positioning on the chassis, it effectively prevents the filter assembly from shifting or loosening due to vibrations during vehicle operation. This ensures that the connecting pipe in the middle of the chassis is always precisely aligned with the atmospheric vent at the upper end of the canister, guaranteeing stable airflow through the activated carbon filter layer. Furthermore, the fit between the chassis and the grooves also helps improve the sealing effect between them, reducing the possibility of unfiltered airflow leaking through gaps, further strengthening the control of dust emissions from the atmospheric vent, ensuring the carbon canister's adsorption efficiency for fuel vapors, and reducing fuel waste.

[0008] Preferably, a sealing groove is provided at the edge of the bottom surface of the groove; a sealing ring is provided inside the sealing groove. In this automotive carbon canister structure, the sealing groove at the edge of the bottom surface of the groove cooperates with the sealing ring installed inside the groove, which can significantly improve the sealing performance between the chassis and the upper end of the canister, and effectively prevent unfiltered airflow from leaking from the installation gap between the chassis and the canister.

[0009] Preferably, the chassis and the upper part of the tank are connected by connecting bolts; an insert plate is fixedly installed on the rear side wall of the chassis; a slot is opened on the side wall of the groove to cooperate with the insert plate. The snap-fit ​​between the insert plate and the slot can quickly achieve pre-positioning during chassis installation, ensuring that the chassis drives the connecting pipe to accurately align with the atmospheric port at the upper end of the tank, avoiding misalignment of the airflow channel due to installation offset, and effectively limiting the lateral displacement of the chassis during vehicle vibration, providing a stable foundation for subsequent bolt fixing; on the other hand, the setting of connecting bolts can further enhance the connection stability between the chassis and the tank, prevent the filter components from loosening due to vibration, and simplify the disassembly and assembly process of the filter components; during disassembly, only the connecting bolts need to be unscrewed, and the chassis can be slid along the dovetail groove to complete the separation, solving the problem of cumbersome maintenance operations of existing carbon canister filter-related components; in addition, this double fixing structure can also ensure the fit between the chassis and the tank, help improve the sealing performance, prevent unfiltered airflow from leaking through gaps, ensure that the airflow must pass through the filter of activated carbon in the shell, and thus effectively prevent dust from being discharged with the atmospheric port and ensure the adsorption efficiency of activated carbon for fuel vapor.

[0010] Preferably, the upper end of the connecting pipe is closed, and the lower end is connected to the atmosphere; one side wall of the connecting pipe is fixedly set on the bottom surface of the shell, and the remaining side walls of the connecting pipe are all provided with through holes. Airflow flows out through the through holes in the remaining side walls, preventing the airflow from directly impacting the top of the shell and causing a short circuit. This ensures that the airflow must flow through the activated carbon filled between the shell and the connecting pipe, extending the contact time between the airflow and the activated carbon, and fully utilizing the adsorption effect of the activated carbon on the dust in the airflow.

[0011] Preferably, the housing includes a base plate fixedly mounted on the chassis at its lower end; a connecting pipe fixedly mounted on the base plate; an arc-shaped plate vertically mounted on the edge of the base plate; a cover plate mounted on the end of the arc-shaped plate away from the base plate via screws; and an air pipe fixedly mounted on the arc-shaped plate. The arc-shaped plate vertically mounted on the edge of the base plate, together with the base plate and the cover plate, forms a closed chamber, providing a stable space for the activated carbon. Simultaneously, the air pipe being fixed to the arc-shaped plate ensures a fixed exhaust path, preventing airflow deviation and ensuring sufficient contact between the airflow and the activated carbon inside the housing. The cover plate mounted on the end of the arc-shaped plate away from the base plate via screws makes the cover plate removable. When the activated carbon inside the housing needs replacement due to saturation from adsorbed dust or fuel vapor, only the screws need to be removed to open the cover plate for operation, significantly simplifying the maintenance process and reducing maintenance difficulty.

[0012] Preferably, the trachea and the atmospheric inlet are arranged coaxially.

[0013] Preferably, an arc-shaped baffle is provided at the upper part of the connecting pipe; the baffle is fixedly mounted on the base plate; the baffle, the arc plate, and the base plate are all spaced apart. The arc-shaped baffle guides the airflow from the through hole of the connecting pipe, forcing the airflow to form a more thorough meandering flow within the activated carbon layer between the shell and the connecting pipe, preventing the airflow from flowing directly from the through hole of the connecting pipe to the gas pipe and causing a short circuit, thus prolonging the contact time between the airflow and the activated carbon, ensuring that the activated carbon more thoroughly adsorbs dust and fuel vapor in the airflow. This not only enhances the effect of preventing dust from being discharged from the gas pipe, but also improves the adsorption efficiency of fuel vapor and reduces fuel waste. Compared with a right-angle structure, the arc-shaped structure reduces the airflow resistance, preventing the airflow from impacting the baffle and generating eddies that cause dust accumulation. At the same time, the spaced arrangement of the baffle, the arc plate, and the base plate ensures smooth airflow and prevents airflow channel blockage caused by structural obstruction, solving the problem of carbon canister blockage and failure due to dust accumulation. In addition, the design of fixing the baffle to the base plate ensures its stability under the vibration environment of vehicle driving, continuously playing its airflow guiding role and ensuring the stability of the carbon canister's filtration and adsorption performance.

[0014] Preferably, the baffle is provided with two vents. The two vents can provide an orderly discharge channel for the airflow that is guided by the baffle and flows in a meandering manner, so as to avoid the airflow from accumulating inside the shell due to the baffle blocking the flow and generating excessive atmospheric pressure resistance, and prevent the air pressure imbalance from affecting the overall airflow circulation of the carbon canister.

[0015] Preferably, filters are installed in both the through-hole and the air tube. These filters create a dual dust interception and protection system. The filter in the through-hole of the connecting tube pre-intercepts dust (such as activated carbon abrasive particles) carried in the airflow as it exits, preventing dust from clogging the through-hole or penetrating the activated carbon layer and causing blockage of the adsorption channels. The filter in the air tube acts as the final filtration barrier before the airflow exits, further intercepting fine dust that has not been fully adsorbed by the activated carbon. This dual filtration significantly enhances the control of dust at the air vent, effectively preventing dust from being discharged with the airflow and polluting the environment.

[0016] The beneficial effects of this utility model are: This automotive carbon canister filter assembly features a connecting pipe encased in a shell, with activated carbon filling the space between the shell and the connecting pipe. This effectively treats the airflow at the vent, utilizing the activated carbon to adsorb dust particles (such as abrasive particles from the activated carbon or externally introduced dust) in the airflow. This prevents dust from being discharged through the vent and causing pollution, and also avoids dust accumulation that could clog the internal adsorption channels of the carbon canister. This ensures the adsorption efficiency of the activated carbon for fuel vapors, reducing fuel waste caused by decreased adsorption efficiency. Consequently, it effectively solves the pollution, blockage, and fuel waste problems caused by insufficient dust control at the vent of existing carbon canisters. Furthermore, the filter assembly is detachably mounted on the upper part of the canister in conjunction with the vent, and the filter assembly uses a sliding chassis, allowing for easy installation and removal of the filter assembly from the canister. This effectively solves the problem of cumbersome replacement and cleaning operations and high maintenance costs associated with fixed installation of filter-related components in existing carbon canisters, significantly improving maintenance convenience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the filter assembly of this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the structure of the filter assembly of this utility model; Figure 5 This is an exploded view of the filter assembly of this utility model; Figure 6 This is a cross-sectional view of the filter assembly of this utility model.

[0018] In the diagram: 1-tank body, 2-adsorption port, 3-desorption port, 4-atmosphere port, 5-chassis, 6-connecting pipe, 7-shell, 8-gas pipe, 9-connecting bolt, 10-sealing ring, 11-filter screen; 101-Groove, 102-Dovetail groove, 103-Sealing groove, 104-Slot; 501-Dovetail platform, 502-Insertion plate; 601-Through hole; 701-Base plate, 702-Arc plate, 703-Screw, 704-Cover plate, 705-Baffle, 706-Ventilation port. Detailed Implementation

[0019] The present invention will now be described and illustrated in detail with reference to the embodiments.

[0020] Example 1 like Figure 1-5As shown, a car carbon canister equipped with a filter assembly includes a canister 1. Adsorption ports 2 and desorption ports 3 are respectively provided on both sides of the upper end of the canister 1. An atmospheric port 4 is opened in the middle of the upper end of the canister 1. A filter assembly is detachably installed on the upper end of the canister 1 in conjunction with the atmospheric port 4. The filter assembly includes a chassis 5 slidably installed on the upper end of the canister 1. A connecting pipe 6 is fixedly installed in the middle of the chassis 5. A shell 7 is fitted over the connecting pipe 6. An air pipe 8 is provided on the outer wall of the shell 7. Activated carbon is filled between the shell 7 and the connecting pipe 6.

[0021] In this automotive carbon canister filter assembly, the connecting pipe 6 is fitted with a housing 7, and activated carbon is filled between the housing 7 and the connecting pipe 6. This effectively treats the airflow at the atmospheric vent 4, using activated carbon to adsorb dust in the airflow (such as activated carbon wear particles or external dust), preventing dust from being discharged from the atmospheric vent 4 and causing pollution. It also avoids dust accumulation that could block the adsorption channels inside the carbon canister, ensuring the adsorption efficiency of activated carbon for fuel vapor and reducing fuel waste caused by decreased adsorption efficiency. This effectively solves the pollution, blockage, and fuel waste problems caused by insufficient dust control at the atmospheric vent 4 of existing carbon canisters. At the same time, by detachably installing the filter assembly at the upper end of the canister 1 in conjunction with the atmospheric vent 4, and by using a sliding chassis 5 for the filter assembly, the filter assembly can be easily installed and removed from the canister 1. This effectively solves the problem of cumbersome replacement and cleaning operations and high maintenance costs caused by the fixed installation of filter-related components in existing carbon canisters, greatly improving maintenance convenience.

[0022] In the above configuration, dovetail platforms 501 are fixedly installed on the bottom surfaces of the left and right sides of the chassis 5; a groove 101 is provided on the upper end of the tank body 1 to match the chassis 5; and a dovetail groove 102 is provided on the upper end of the tank body 1 to match the dovetail platforms 501. In this automotive carbon canister structure, the dovetail platforms 501 fixed on the bottom surfaces of the left and right sides of the chassis 5 and the dovetail groove 102 provided on the upper end of the tank body 1 form a sliding fit. At the same time, the groove 101 on the upper end of the tank body 1 to match the chassis 5 achieves pre-positioning during chassis 5 installation. The synergistic effect of these three elements brings multiple beneficial effects: the matching structure of the dovetail platforms 501 and the dovetail groove 102 provides stable guidance for the disassembly and assembly of the filter assembly, allowing the chassis 5 to drive the entire filter assembly to slide smoothly along the dovetail groove 102; the dovetail structure itself has good limiting and anti-detachment performance. The groove 101 fits snugly against the chassis 5, effectively preventing the filter components from shifting or loosening due to vibration during vehicle operation. This ensures that the connecting pipe 6 in the middle of the chassis 5 is always precisely aligned with the atmospheric port 4 at the top of the tank 1, guaranteeing stable airflow through the activated carbon filter layer. At the same time, the fit between the chassis 5 and the groove 101 also helps to improve the sealing effect between them, reducing the possibility of unfiltered airflow leaking through gaps. This further strengthens the control of dust discharge from the atmospheric port 4, ensuring the adsorption efficiency of the carbon canister for fuel vapor and reducing fuel waste.

[0023] A sealing groove 103 is provided at the bottom edge of the groove 101; a sealing ring 10 is provided inside the sealing groove 103. The chassis 5 is connected to the upper end of the tank body 1 by connecting bolts 9; an insert plate 502 is fixedly provided on the rear side wall of the chassis 5; a slot 104 is provided on the side wall of the groove 101 to cooperate with the insert plate 502.

[0024] In this automotive carbon canister structure, the sealing groove 103 provided at the bottom edge of the groove 101 cooperates with the sealing ring 10 installed in the groove, which can significantly improve the sealing performance between the chassis 5 and the upper end of the canister 1, and effectively prevent unfiltered airflow from leaking from the installation gap between the chassis 5 and the canister 1. The snap-fit ​​between the insert plate 502 and the slot 104 allows for quick pre-positioning during chassis 5 installation, ensuring that the chassis 5 drives the connecting pipe 6 precisely aligned with the atmospheric port 4 at the upper end of the tank 1. This prevents misalignment of the airflow channel due to installation deviation and effectively limits the lateral displacement of the chassis 5 during vehicle vibration, providing a stable foundation for subsequent bolt fixing. On the other hand, the connecting bolts 9 further enhance the connection stability between the chassis 5 and the tank 1, preventing the filter assembly from loosening due to vibration and simplifying the disassembly and assembly process of the filter assembly. During disassembly, simply unscrewing the connecting bolts 9 allows the chassis 5 to slide along the dovetail groove 102 to complete the separation, solving the problem of cumbersome maintenance operations for existing carbon canister filter components. In addition, this double fixing structure also ensures the fit between the chassis 5 and the tank 1, helping to improve sealing performance and preventing unfiltered airflow from leaking through gaps. This ensures that the airflow must pass through the activated carbon filter inside the shell 7, thereby effectively preventing dust from being discharged with the atmospheric port 4 and ensuring the adsorption efficiency of the activated carbon for fuel vapor.

[0025] like Figure 5 and Figure 6 As shown, the upper end of the connecting pipe 6 is closed, and the lower end is connected to the atmospheric vent 4. One side wall of the connecting pipe 6 is fixedly installed on the bottom surface of the housing 7, and the remaining side walls of the connecting pipe 6 are provided with through holes 601. The housing 7 includes a base plate 701 fixedly installed on the chassis 5 at its lower end; the connecting pipe 6 is fixedly installed on the base plate 701; an arc plate 702 is vertically installed at the edge of the base plate 701; a cover plate 704 is installed at the end of the arc plate 702 away from the base plate 701 by screws 703; and an air pipe 8 is fixedly installed on the arc plate 702. The air pipe 8 is coaxially arranged with the atmospheric vent 4. An arc-shaped baffle 705 is provided on the upper part of the connecting pipe 6; the baffle 705 is fixedly installed on the base plate 701; and the baffle 705 is spaced apart from the arc plate 702 and the chassis 5. Two vents 706 are provided on the baffle 705.

[0026] The airflow exits through the through-hole 601 in the remaining sidewall, preventing the airflow from directly impacting the top of the shell 7 and causing a short circuit. This ensures that the airflow must flow through the activated carbon filled between the shell 7 and the connecting pipe 6, extending the contact time between the airflow and the activated carbon and fully utilizing the activated carbon's adsorption effect on dust in the airflow. The arc plate 702, vertically set along the edge of the bottom plate 701, can form a closed chamber with the bottom plate 701 and the cover plate 704, providing a stable space for the activated carbon. At the same time, the air pipe 8 is fixed to the arc plate 702, ensuring that the exhaust path of the air pipe 8 is fixed and preventing airflow deviation during exhaust, ensuring full contact between the airflow and the activated carbon inside the shell 7. The end of the arc plate 702 away from the bottom plate 701 is fitted with a cover plate 704 by a screw 703, making the cover plate 704 removable. When the activated carbon inside the shell 7 needs to be replaced due to saturation from adsorbing dust or fuel vapor, only the screw 703 needs to be removed to open the cover plate 704 for operation, greatly simplifying the maintenance process and reducing the difficulty of maintenance. The arc-shaped baffle 705 guides the airflow from the through hole 601 of the connecting pipe 6, forcing the airflow to form a more thorough meandering flow within the activated carbon layer between the shell 7 and the connecting pipe 6. This prevents the airflow from directly flowing from the through hole 601 of the connecting pipe 6 to the air pipe 8, causing a short circuit, and prolongs the contact time between the airflow and the activated carbon. This ensures that the activated carbon more thoroughly adsorbs dust and fuel vapor in the airflow, enhancing the effect of preventing dust from being discharged from the air pipe 8 and improving the adsorption efficiency of fuel vapor, thus reducing fuel waste. Compared with a right-angle structure, the arc-shaped structure reduces airflow resistance and prevents the airflow from impacting the baffle 705 and generating eddies that lead to dust accumulation. At the same time, the spacing between the baffle 705, the arc plate 702, and the chassis 5 ensures smooth airflow and prevents airflow channel blockage caused by structural obstruction, solving the problem of carbon canister blockage and failure due to dust accumulation. In addition, the design of the baffle 705 being fixed to the base plate 701 ensures its stability under vehicle vibration conditions, continuously playing its airflow guiding role and ensuring the stability of the carbon canister's filtration and adsorption performance. The two vents 706 provide an orderly discharge channel for the airflow that is guided by the baffle 705 and flows in a meandering manner, so as to avoid the airflow from accumulating inside the shell 7 due to the obstruction of the baffle 705 and generating excessive atmospheric pressure resistance, and prevent the air pressure imbalance from affecting the overall airflow circulation of the carbon canister.

[0027] Both the through-hole 601 and the air pipe 8 are equipped with filter screens 11. The filter screens 11 in both the through-hole 601 and the air pipe 8 can form a dual dust interception and protection system. The filter screen 11 in the through-hole 601 of the connecting pipe 6 can pre-intercept dust such as activated carbon abrasive particles carried in the airflow when the airflow flows out of the connecting pipe 6, preventing dust from clogging the through-hole 601 or penetrating into the activated carbon layer and causing blockage of the adsorption channel. The filter screen 11 in the air pipe 8 acts as the last filtration barrier before the airflow is discharged, further intercepting fine dust that has not been fully adsorbed by the activated carbon. The dual filtration effect significantly enhances the dust control effect at the four air vents, effectively preventing dust from being discharged with the airflow and polluting the environment.

Claims

1. A car carbon canister equipped with a filter assembly, comprising a canister body (1), wherein an adsorption port (2) and a desorption port (3) are respectively provided on both sides of the upper end of the canister body (1), and an atmospheric vent (4) is provided in the middle of the upper end of the canister body (1), characterized in that, A filter assembly is detachably installed at the upper end of the tank (1) with an air vent (4); the filter assembly includes a chassis (5) that is slidably installed at the upper end of the tank (1); a connecting pipe (6) is fixedly installed in the middle of the chassis (5); a shell (7) is installed on the outer side of the connecting pipe (6); an air pipe (8) is installed on the outer wall of the shell (7); activated carbon is filled between the shell (7) and the connecting pipe (6).

2. The automotive carbon can provided with a filter assembly according to claim 1, characterized in that, The bottom surfaces of the chassis (5) are fixedly provided with dovetail platforms (501); the upper end of the tank (1) is provided with a groove (101) in conjunction with the chassis (5); the upper end of the tank (1) is provided with a dovetail groove (102) in conjunction with the dovetail platform (501).

3. The automotive carbon can provided with a filter assembly according to claim 2, characterized in that, A sealing groove (103) is provided at the bottom edge of the groove (101); a sealing ring (10) is provided inside the sealing groove (103).

4. The automotive carbon can provided with a filter assembly according to claim 3, characterized in that, The chassis (5) is connected to the upper end of the tank (1) by connecting bolts (9); the rear side wall of the chassis (5) is fixedly provided with a plate (502); the side wall of the groove (101) is provided with a slot (104) in cooperation with the plate (502).

5. The automotive carbon can provided with a filter assembly according to claim 1, characterized in that, The upper end of the connecting pipe (6) is closed, and the lower end is connected to the atmospheric port (4); one side wall of the connecting pipe (6) is fixedly set on the bottom surface of the shell (7), and the remaining side walls of the connecting pipe (6) are all provided with through holes (601).

6. The automotive carbon can provided with a filter assembly according to claim 5, characterized in that, The housing (7) includes a base plate (701) fixedly mounted on the chassis (5) at its lower end; a connecting pipe (6) fixedly mounted on the base plate (701); an arc plate (702) vertically mounted on the edge of the base plate (701); a cover plate (704) mounted on the end of the arc plate (702) away from the base plate (701) by screws (703); and an air pipe (8) fixedly mounted on the arc plate (702).

7. The automotive carbon can provided with a filter assembly according to claim 6, characterized in that, The trachea (8) and the atmospheric vent (4) are coaxially arranged.

8. The automotive carbon can provided with a filter assembly according to claim 6, characterized in that, A circular arc-shaped baffle (705) is provided on the upper part of the connecting pipe (6); the baffle (705) is fixedly installed on the base plate (701); the baffle (705) is spaced apart from the circular arc plate (702) and the base plate (5).

9. The automotive carbon can provided with a filter assembly according to claim 8, characterized in that, Two ventilation openings (706) are provided on the baffle (705).

10. The automotive carbon can provided with a filter assembly according to claim 5, characterized in that, A filter screen (11) is provided inside both the through hole (601) and the air tube (8).

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