A carbon canister and fuel vapor control system

Abstract

The application discloses a carbon tank and a fuel evaporation control system, wherein the carbon tank is loaded on a vehicle and used for adsorbing evaporated fuel, the carbon tank comprises a containing cavity, and an adsorbent is arranged in the containing cavity; at least two adsorption units are arranged in the containing cavity along the axial direction of the carbon tank; a partition is arranged in the adsorption unit and arranged perpendicularly to the axial direction of the carbon tank, and the partition divides one adsorption unit into two adsorption chambers; an air inlet channel is arranged in the containing cavity and used for guiding gas from an air inlet on the shell into the adsorption chamber; and an air outlet channel is arranged in the containing cavity and used for guiding the gas from the adsorption chamber to the containing cavity through an air outlet on the shell. The containing cavity of the carbon tank is divided into multiple adsorption chambers, thereby effectively blocking the migration of adsorbent particles, ensuring smooth gas flow and uniform distribution of the adsorbent, and reducing the risk of carbon powder blocking the filter pad.

Description

Technical Field

[0001] This application generally relates to the technical field of components in a vehicle fuel evaporation control system. More specifically, this application relates to a carbon canister; further, this application also relates to a fuel evaporation control system. Background Technology

[0002] The evaporative fuel absorption control (EVAP) system in gasoline vehicles includes a fuel tank, activated carbon canister, solenoid valve, and connecting lines. The activated carbon canister is used to adsorb fuel vapors, preventing the direct emission of volatile organic compounds (VOCs). However, the activated carbon particles in the canister are easily broken down under vehicle vibration and temperature cycling conditions, producing fine carbon powder with a particle size of less than 50 micrometers. This carbon powder gradually settles under gravity and accumulates in the filter layer at the bottom of the canister, causing filter pad blockage and increased system back pressure. Furthermore, the blockage further hinders gas flow, reducing hydrocarbon desorption efficiency and even causing refueling nozzle tripping malfunctions.

[0003] In view of this, there is an urgent need to provide a carbon canister and fuel evaporation control system to prevent carbon powder from migrating and accumulating in the bottom filter layer of the carbon canister and to prevent the filter pad from becoming clogged. Summary of the Invention

[0004] In order to at least solve one or more of the technical problems mentioned above, this application proposes a carbon canister and fuel evaporation control system in several aspects to block carbon powder migration and agglomeration at the bottom filter layer of the carbon canister and prevent filter pad clogging.

[0005] In a first aspect, this application provides a carbon canister for use in a vehicle to adsorb evaporated fuel. The carbon canister includes: a receiving cavity surrounded by a shell, the receiving cavity containing an adsorbent; at least two adsorption units disposed in the receiving cavity along the axial direction of the carbon canister; each adsorption unit having a partition perpendicular to the axial direction of the carbon canister, the partition dividing one adsorption unit into two adsorption chambers; an inlet passage disposed in the receiving cavity for guiding gas from an inlet on the shell into the adsorption chambers; and an outlet passage disposed in the receiving cavity for guiding gas from the adsorption chambers through an outlet on the shell and out of the receiving cavity.

[0006] In some embodiments, the adsorption chamber is provided with an outlet pipe extending along the axial direction of the carbon canister, and the peripheral wall of the outlet pipe is provided with a plurality of first filter holes; the outlet pipes in the two adsorption chambers of each adsorption unit are not connected, and the outlet pipes in the two adjacent adsorption chambers of adjacent adsorption units are connected.

[0007] In some embodiments, the adsorption unit has an adsorption channel arranged along the axial direction of the carbon canister on the outer periphery of the outlet pipe, and a plurality of second filter holes are provided on the inner peripheral wall of the adsorption channel; during the exhaust process, the gas moves radially from the carbon canister in the first adsorption chamber to the adsorption channel, and enters the second adsorption chamber through the adsorption channel, and then enters the adjacent adsorption unit through the outlet channel of the second adsorption chamber; wherein the first adsorption chamber is arranged closer to the inlet than the second adsorption chamber.

[0008] In some embodiments, the outer peripheral wall of the adsorption channel is formed by the shell of the carbon canister.

[0009] In some implementations, a support plate is provided between two adjacent adsorption units, which is perpendicular to the axial direction of the carbon canister; the support plate is provided with a through hole for the gas outlet pipeline to connect.

[0010] In some implementations, filter paper is provided at the support plate.

[0011] In some embodiments, the air intake channel is a connecting pipe that extends along the axial direction of the carbon canister and whose end extends into the adsorption chamber furthest from the air intake on the housing.

[0012] In some implementations, the end of the connecting tube is close to the end wall of the adsorption chamber furthest from the air inlet.

[0013] In some embodiments, the outer peripheral wall of the separator is abutted and fixedly connected to the inner peripheral wall of the housing, and the separator has a plurality of spaced ventilation holes near its outer peripheral edge; or the outer peripheral wall of the separator is abutted and fixedly connected to the inner peripheral wall of the adsorption channel.

[0014] In a second aspect, this application provides a fuel evaporation control system, the system including the aforementioned carbon canister.

[0015] With the carbon canister provided above, this embodiment of the application cleverly divides the adsorption unit into two independent adsorption chambers by incorporating an adsorption unit within its housing cavity and a separator within that unit. Each chamber is filled with adsorbent. This separation design not only improves the adsorption efficiency of the carbon canister but also effectively prevents excessive movement and accumulation of adsorbent particles inside the canister, thereby significantly reducing the risk of carbon powder clogging the filter pad and ensuring smooth gas flow within the canister. Furthermore, in some embodiments, by setting up an outlet pipe and adsorption channel, the gas flow path within the carbon canister becomes more tortuous, increasing the contact time and contact area between the gas and the adsorbent, thereby significantly improving the oil and gas adsorption efficiency and reducing oil and gas emissions. Attached Figure Description

[0016] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein:

[0017] Figure 1 A schematic diagram of the carbon canister structure according to an embodiment of this application is shown;

[0018] Figure 2 A schematic diagram of the structure of the separator in the carbon canister according to an embodiment of this application is shown;

[0019] Figure 3 A schematic diagram of the structure of the support plate in the carbon canister according to an embodiment of this application is shown.

[0020] In the picture: 100, carbon canister;

[0021] 101. Shell; 102. Adsorption unit; 103. Separator; 104. Adsorption chamber; 105. Gas outlet pipe; 106. Adsorption channel; 107. Support plate; 108. Through hole; 109. First filter hole; 110. Second filter hole; 111. Gas outlet; 112. Vent hole. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0025] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0026] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0027] like Figure 1 As shown, in some embodiments, this application provides a carbon canister 100, which is mounted on a vehicle and used for adsorbing evaporated fuel. The carbon canister 100 includes: a receiving cavity surrounded by a shell, the receiving cavity containing an adsorbent; at least two adsorption units 102 disposed in the receiving cavity along the axial direction of the carbon canister 100; each adsorption unit 102 having a partition 103 disposed perpendicular to the axial direction of the carbon canister 100, and the partition 103 dividing one adsorption unit 102 into two adsorption chambers 104; an air inlet passage disposed in the receiving cavity for guiding gas from an air inlet on the shell into the adsorption chambers 104; and an air outlet passage disposed in the receiving cavity for guiding gas from the adsorption chambers 104 through an air outlet on the shell and out of the receiving cavity.

[0028] The carbon canister 100 of this application includes a receiving cavity enclosed by a shell. This receiving cavity is the core part of the carbon canister 100 and is mainly used to load adsorbent, which is typically activated carbon particles and has the function of adsorbing fuel vapor. In the receiving cavity, at least two adsorption units 102 are arranged sequentially along the axial direction of the carbon canister 100. A separator 103 perpendicular to the axial direction of the carbon canister 100 is provided in the adsorption unit 102, dividing one adsorption unit 102 into two adsorption chambers 104. Each adsorption chamber 104 is filled with adsorbent. In addition, an air inlet (not shown in the figure) and an air outlet 111 are provided at one end of the shell of the carbon canister 100. The receiving cavity is also provided with an air inlet channel connected to the air inlet and an air outlet channel connected to the air outlet 111, respectively. The air inlet channel introduces gas from the air inlet on the shell into the adsorption chamber 104, and the air outlet channel guides the adsorbed gas from the adsorption chamber 104 to the air outlet 111 on the shell for discharge.

[0029] The separator 103 in the adsorption unit 102 of this application can isolate adsorbent particles, preventing them from moving and accumulating excessively inside the carbon canister 100, thus reducing the risk of carbon powder clogging the filter pad. During use, even if the adsorbent in one adsorption chamber 104 is damaged, the separator 103 can block it in the adsorption chamber 104, preventing carbon powder from spreading to the entire carbon canister 100. Other adsorption chambers 104 can still work normally, ensuring the maintenance of the overall adsorption function of the carbon canister 100, thereby enhancing the reliability and durability of the system.

[0030] In one specific implementation, the air intake channel is a connecting pipe (not shown in the figure) that extends along the axial direction of the carbon canister 100, and its end extends into the adsorption chamber 104, which is the furthest from the air intake on the housing.

[0031] In this application, the intake channel is designed as a connecting pipe extending along the axial direction of the carbon canister 100. This connecting pipe starts from the intake port of the carbon canister 100 and extends to the adsorption chamber 104 furthest from the intake port inside the carbon canister 100. This design ensures that the gas entering the carbon canister 100 can be directly delivered to the adsorption chamber 104 furthest from the intake port. Consequently, during the exhaust process, the gas can more uniformly contact the adsorbent in each adsorption chamber 104, allowing the gas to be fully adsorbed within the carbon canister 100 and improving the adsorption efficiency.

[0032] It is worth noting that this solution does not limit the specific location where the end of the connecting pipe extends into the adsorption chamber 104. For example, in one specific embodiment, the starting point of the connecting pipe is located at the air inlet of the carbon canister 100, extending along the axial direction of the carbon canister 100, while its end is close to the end wall of the adsorption chamber 104 furthest from the air inlet. By extending the end of the connecting pipe to the end wall of the adsorption chamber 104 closest to the farthest end, the flow path of the gas within the entire carbon canister 100 is lengthened, further increasing the contact time between the gas and the adsorbent, allowing the oil and gas to be more fully adsorbed, thereby significantly improving the adsorption efficiency. In other specific embodiments, the extended end of the connecting pipe can be located at any height position in the adsorption chamber 104, where the height direction of the adsorption chamber 104 refers to the axial direction of the carbon canister 100.

[0033] In one specific implementation, an outlet pipe 105 extending along the axial direction of the carbon canister 100 is provided in the adsorption chamber 104, and a plurality of first filter holes 109 are provided on the peripheral wall of the outlet pipe 105; the outlet pipes 105 in the two adsorption chambers 104 in each adsorption unit 102 are not connected, and the outlet pipes 105 in the two adjacent adsorption chambers 104 in adjacent adsorption units 102 are connected.

[0034] Those skilled in the art will understand that this solution does not limit the specific number of adsorption units 102; however, for better explanation of the above, this solution will refer to the appendix. Figure 1 The above scheme is explained below. Specifically, the adsorption chamber 104 in this scheme is equipped with two adsorption units 102, namely a first adsorption unit and a second adsorption unit. The first adsorption unit is located away from the air inlet, and the second adsorption unit is located close to the air inlet. Each adsorption unit 102 has two adsorption chambers 104, namely a first adsorption chamber and a second adsorption chamber, wherein the first adsorption chamber is located away from the air inlet, and the second adsorption chamber is located close to the air inlet.

[0035] In this design, all adsorption chambers 104 in the first and second adsorption units are provided with outlet pipes 105 extending axially along the carbon canister 100. These outlet pipes 105, as key components of the outlet channel, have multiple first filter holes 109 evenly distributed on their peripheral walls. That is, in this design, the outlet pipes 105, as part of the outlet channel, allow the gas in the adsorption chambers 104 to enter the outlet pipes 105 through these first filter holes 109 after the adsorption process is completed, and finally exit the carbon canister 100 through the outlet pipes 105.

[0036] It is worth noting that within the same adsorption unit 102, the outlet pipes 105 in the two adsorption chambers 104 are independent and not interconnected. This design aims to force the gas to enter the other adsorption chamber 104 through other pathways, thereby increasing the gas's movement trajectory, prolonging its residence time in the adsorbent, and thus significantly enhancing the adsorption efficiency of the carbon canister 100. In adjacent adsorption units 102, the outlet pipes 105 of adjacent adsorption chambers 104 are interconnected; that is, the outlet pipes 105 in the second adsorption chamber of the first adsorption unit and the first adsorption chamber of the second adsorption unit are interconnected. This ingenious interconnection design provides an effective flow channel for the gas to smoothly enter from one adsorption unit 102 to another, ensuring smooth gas flow between multiple adsorption units 102, thereby achieving uniformity and high efficiency in the adsorption performance of the entire carbon canister 100.

[0037] Those skilled in the art will understand that the outlet pipe 105 can also be provided only in the second adsorption chamber of the first adsorption unit and in the first and second adsorption chambers of the second adsorption unit, while the outlet pipe 105 is not provided in the first adsorption chamber of the first adsorption unit. That is, the outlet pipe 105 is not provided in the adsorption chamber farthest from the inlet. In use, when the gas enters the carbon canister 100 from the inlet, it first enters the first adsorption chamber of the first adsorption unit. In this adsorption chamber 104, the gas comes into full contact with the adsorbent, completing the initial adsorption. Since this chamber does not have an outlet pipe 105, the gas cannot be directly discharged, but is forced to flow from the first adsorption chamber of the first adsorption unit to the second adsorption chamber through a specific channel or gap. This process not only prolongs the residence time of the gas in the carbon canister 100, but also increases the contact area between the gas and the adsorbent, thereby improving the adsorption efficiency.

[0038] When the gas enters the second adsorption chamber of the first adsorption unit, it comes into contact with the adsorbent again for secondary adsorption. After this stage of adsorption is completed, the gas enters the second adsorption unit through the outlet pipe 105 provided in this chamber. In the second adsorption unit, the gas flows sequentially through the first and second adsorption chambers, continuing to contact the adsorbent and completing deep adsorption. Finally, the adsorbed gas is discharged from the carbon canister 100 through the outlet pipe 105 provided in the second adsorption unit.

[0039] This design, through the rational planning of gas flow paths, makes the gas movement trajectory within the carbon canister 100 more complex, ensuring that the gas can fully contact the adsorbent in each adsorption chamber 104, maximizing the adsorption effect. At the same time, this optimized design reduces unnecessary outlet pipes 105, lowers manufacturing costs, and improves the economy and practicality of the carbon canister 100.

[0040] In one specific embodiment, the adsorption unit 102 has an adsorption channel 106 arranged along the axial direction of the carbon canister 100 on the outer periphery of the outlet pipe 105, and a plurality of second filter holes 110 are provided on the inner peripheral wall of the adsorption channel 106; during the exhaust process, the gas moves radially from the first adsorption chamber to the adsorption channel 106 along the carbon canister 100, and enters the second adsorption chamber through the adsorption channel 106, and then enters the adjacent adsorption unit 102 through the outlet channel of the second adsorption chamber; wherein the first adsorption chamber is located closer to the inlet than the second adsorption chamber.

[0041] Following the above implementation scheme, each adsorption unit 102 in this scheme has an adsorption channel 106 arranged along the axial direction of the carbon canister 100, and the adsorption channel 106 is located on the outer periphery of the gas outlet pipe 105, forming a gas outlet channel together with the adsorption pipe. In addition, the inner peripheral wall of the adsorption channel 106 in this scheme is provided with a plurality of second filter holes 110, and the second filter holes 110 are used to allow gas to flow between the adsorption chamber 104 and the adsorption channel 106.

[0042] The above content details how the inlet and outlet channels in the containment cavity are formed. The following section details the movement trajectory of the gas after it enters the containment cavity (see appendix). Figure 1 (The direction the arrow points).

[0043] In this scheme, gas enters the first adsorption chamber of the first adsorption unit through the inlet and inlet channel, where it comes into full contact with the adsorbent to complete the initial adsorption. Subsequently, the gas moves radially outward from the carbon canister 100 in the first adsorption chamber and enters the adsorption channel 106 through the second filter hole 110 on the inner peripheral wall of the adsorption channel 106. After entering, the gas flows axially from the carbon canister 100 and reaches the second adsorption chamber of the first adsorption unit through the adsorption channel 106, where it comes into contact with the adsorbent again for secondary adsorption. Finally, the gas enters the second adsorption unit through the outlet pipe 105 in the second adsorption chamber. Since the first adsorption chamber and the outlet pipe 105 in the second adsorption unit are not connected, the gas can only enter the first adsorption chamber through the first filter hole 109 on the outlet pipe 105 in the first adsorption chamber and come into contact with the adsorbent. Then, the gas moves radially outward from the first adsorption chamber of the second adsorption unit and enters the adsorption channel 106 through the second filter hole 110 on the inner peripheral wall of the adsorption channel 106. After entering, the gas flows along the axial direction of the carbon canister 100, reaches the second adsorption chamber in the second adsorption unit through the adsorption channel 106, and comes into contact with the adsorbent again for secondary adsorption. After adsorption is completed, the gas is discharged from the carbon canister 100 through the outlet 111.

[0044] This solution decouples the two outlet channels in the two adsorption chambers 104 of an adsorption unit 102, thus allowing the gas to move radially along the carbon canister 100 within the adsorption channel 106. Furthermore, by providing the adsorption channel 106 and a second filter hole 110, the gas entering the adsorption channel 106 can only pass through the second filter hole 110 into the other adsorption chamber 104 and move radially along the adsorption chamber 104 towards the outlet channel. This process increases the gas's trajectory within the carbon canister 100, prolonging the contact time between the gas and the adsorbent, thereby improving adsorption efficiency. In other words, by configuring the outlet channel as an outlet pipe 105 and the adsorption channel 106, this solution makes the gas flow path within the carbon canister 100 more tortuous. This increases the contact time and contact area between the gas and the adsorbent, requiring the gas to sequentially penetrate the adsorbent in multiple adsorption chambers 104, effectively improving oil and gas adsorption efficiency and reducing oil and gas emissions.

[0045] In one specific implementation, the outer peripheral wall of the adsorption channel 106 is formed by the shell of the carbon canister 100.

[0046] In this design, the outer peripheral wall of the adsorption channel 106 is directly formed by the shell of the carbon canister 100, creating an integrated design. This not only reduces the use of separate components but also simplifies the internal structure of the carbon canister 100.

[0047] like Figure 1 and Figure 3 As shown, in a specific embodiment, there is a support plate 107 arranged axially perpendicular to the carbon canister 100 between two adjacent adsorption units 102; the support plate 107 is provided with a through hole 108 for the gas supply pipeline 105 to connect.

[0048] In this design, a support plate 107 is provided between the first adsorption unit and the second adsorption unit, perpendicular to the axial direction of the carbon canister 100. The peripheral wall of the support plate 107 is fixedly connected to the inner peripheral wall of the shell. Furthermore, the support plate 107 is provided with a through hole 108 for connecting the second adsorption chamber in the first adsorption unit to the gas outlet pipe 105 in the first adsorption chamber of the second adsorption unit. In other words, the first adsorption unit and the second adsorption unit in this design are separated by the support plate 107.

[0049] It is worth noting that, such as Figure 2 and Figure 3 As shown, both the support plate 107 and the partition plate in this design have through holes 108 for the connecting pipe to pass through. That is, the support plate 107 in this design has two through holes 108 for the gas pipeline 105 and the connecting pipe to pass through respectively, while the partition plate has only one through hole 108 for the connecting pipe to pass through.

[0050] It is also worth noting that the design of this application does not specifically limit the shape of the carbon canister 100; it can be a cylindrical structure or a square structure. When it is a cylindrical structure, the specific structural diagram of the separator 103 and the support plate 107 is shown in the top view. Figure 2 and attached Figure 3 The diagram shows a circle. When it is a square structure, the specific structural diagram of the partition plate and support plate 107 is square.

[0051] In one specific implementation, filter paper is provided at the support plate 107.

[0052] In this design, filter paper is spaced apart from the support plate 107 above it, with the "above" referring to the side near the outlet 111. During exhaust, gas enters the gap between the support plate 107 and the filter paper from the first adsorption unit, and then passes through the filter paper before entering the second adsorption unit. In other words, this design further filters the gas by using filter paper, preventing the exhaust gas from polluting the environment.

[0053] In another specific embodiment, the support plate 107 is made of filter paper. That is, in this embodiment, only the adsorption channel 106 is provided, and the gas outlet pipe 105 is not provided. Instead, the filter paper is used as the gas outlet channel. After the gas completes adsorption in the first adsorption unit, it passes through the filter paper and enters the second adsorption unit. After adsorption is completed in the second adsorption unit, it is discharged from the carbon canister 100 through the gas outlet 111.

[0054] like Figure 2 As shown, in a specific embodiment, the outer peripheral wall of the partition 103 is fixedly connected to the inner peripheral wall of the housing, and the partition 103 has a number of vent holes 112 spaced apart near its outer peripheral edge.

[0055] In this design, the outer peripheral wall of the separator 103 is tightly fitted and fixedly connected to the inner peripheral wall of the carbon canister 100 shell to prevent displacement or deformation under conditions such as vehicle vibration and temperature changes. Additionally, several spaced vent holes 112 are provided near the outer periphery of the separator 103. These vent holes 112 are located within the adsorption channel 106, allowing gas to flow radially along the carbon canister 100, thereby forming a specific flow path between the adsorption chambers 104.

[0056] In another specific embodiment, the outer peripheral wall of the separator 103 is fixedly connected to the inner peripheral wall of the adsorption channel 106.

[0057] In this design, the outer peripheral wall of the separator 103 is tightly fitted to the inner peripheral wall of the adsorption channel 106, and a stable connection between the two is ensured by a fixed connection (such as welding, bonding, or mechanical fixing). This connection method allows the separator 103 to reliably divide the adsorption unit 102 into two independent adsorption chambers 104, while ensuring that gas flows between the chambers through the adsorption channel 106.

[0058] The solution proposed in this application effectively blocks the migration of adsorbent particles by dividing the containment cavity of the carbon canister 100 into multiple adsorption chambers 104, ensuring smooth gas flow and uniform distribution of the adsorbent, and reducing the risk of carbon powder clogging the filter pad. Furthermore, this solution further enhances the flow path of the gas within the carbon canister 100 by incorporating an outlet pipe 105 and an adsorption channel 106, increasing the contact time and area between the gas and the adsorbent, thereby significantly improving the oil and gas adsorption efficiency and reducing oil and gas emissions.

[0059] In some specific implementations, this application also provides a fuel evaporation control system, the system including the carbon canister 100 described in the above embodiments.

[0060] This embodiment also provides a fuel evaporation control (EVAP) system comprising the carbon canister 100 described in the above embodiments. By applying the optimized carbon canister 100 described above to the fuel evaporation control (EVAP) system, this application not only improves the adsorption efficiency of the carbon canister 100 and the uniformity of airflow distribution, but also enhances the reliability and adaptability of the system. These improvements make the EVAP system more efficient and stable in controlling vehicle fuel evaporation emissions, providing strong technical support for meeting increasingly stringent environmental regulations.

[0061] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A carbon canister, mounted on a vehicle and used for adsorbing evaporated fuel, characterized in that, The carbon canister includes: A receiving cavity, which is surrounded by a shell, contains an adsorbent; At least two adsorption units are arranged in the receiving cavity along the axial direction of the carbon canister; each adsorption unit has a partition arranged perpendicular to the axial direction of the carbon canister, and the partition divides one adsorption unit into two adsorption chambers; An air inlet channel, disposed within the receiving cavity, is used to guide gas from the air inlet on the housing into the adsorption chamber; and An exhaust channel is provided in the receiving cavity and is used to guide gas from the adsorption chamber through the exhaust port on the shell and out of the receiving cavity; The adsorption chamber is provided with an outlet pipe extending along the axial direction of the carbon canister, and the peripheral wall of the outlet pipe is provided with a plurality of first filter holes. The outlet pipes in the two adsorption chambers of each adsorption unit are not connected, while the outlet pipes in the two adjacent adsorption chambers of adjacent adsorption units are connected. The adsorption unit has an adsorption channel arranged along the axial direction of the carbon canister on the outer periphery of the gas outlet pipe, and the inner peripheral wall of the adsorption channel is provided with a plurality of second filter holes. During the exhaust process, the gas moves radially along the carbon canister in the first adsorption chamber to the adsorption channel, and then enters the second adsorption chamber through the adsorption channel, and then enters the adjacent adsorption unit through the outlet channel of the second adsorption chamber; wherein the first adsorption chamber is located closer to the air inlet relative to the second adsorption chamber. A support plate is provided between two adjacent adsorption units, which is perpendicular to the axial direction of the carbon canister. The support plate is provided with a through hole for the air outlet pipe to connect; The air intake channel is a connecting pipe that extends along the axial direction of the carbon canister, and its end extends into the adsorption chamber furthest from the air intake on the housing.

2. The carbon canister according to claim 1, characterized in that, The outer peripheral wall of the adsorption channel is formed by the shell of the carbon canister.

3. The carbon canister according to claim 1, characterized in that, A filter paper is provided at the support plate.

4. The carbon canister according to claim 1, characterized in that, The end of the connecting tube is close to the end wall of the adsorption chamber furthest from the air inlet.

5. The carbon canister according to claim 1, characterized in that, The outer peripheral wall of the partition is fixedly connected to the inner peripheral wall of the housing, and the partition has a plurality of spaced vent holes near its outer peripheral edge; or The outer peripheral wall of the separator is fixedly connected to the inner peripheral wall of the adsorption channel.

6. A fuel evaporation control system, characterized in that, The system includes the carbon canister as described in any one of claims 1-5.

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