Evaporated fuel treatment device

Abstract

The present disclosure provides an evaporative fuel processing device. The evaporative fuel processing device includes a main body case and a cover portion. The cover portion includes an object port and is configured to be attached to a predetermined attachment surface in the main body case. The object port is configured to guide a gas in the object adsorption chamber in a direction intersecting a flow direction of the gas. The cover portion is configured to select one attachment angle from a plurality of attachment angles and attach to the main body case by rotating in a rotation direction before attaching to the main body case.

Description

Technical Field

[0001] This disclosure relates to an evaporative fuel processing apparatus. Background Technology

[0002] For example, Japanese Patent Application Publication No. 2022-120492 discloses a structure in an evaporative fuel processing apparatus that secures the main body shell by welding an opening and a cover to close the opening. The cover has a port configured to connect the inside and outside of the evaporative fuel processing apparatus. Summary of the Invention

[0003] However, it is preferable that the orientation of the port of the evaporative fuel treatment device can be changed to correspond to the specifications of the vehicle or other device equipped with the evaporative fuel treatment device. However, after careful research by the inventors of this application, the following problem was found: in the above structure, it is necessary to develop components such as covers or manufacture jigs for each orientation of the port, which makes it difficult to change the orientation of the port.

[0004] One aspect of this disclosure is the desire to easily change the orientation of ports in an evaporative fuel processing apparatus in which the openings and covers of the main housing are fixed.

[0005] One aspect of this disclosure relates to an evaporative fuel processing apparatus having multiple ports. The evaporative fuel processing apparatus includes a main housing and a cover. The main housing has multiple adsorption chambers and an opening. The multiple adsorption chambers are configured to respectively house adsorbent material. The opening is configured to communicate with the target adsorption chamber and the atmosphere. The target adsorption chamber is one of the multiple adsorption chambers.

[0006] The cover has an object port, which is one of a plurality of ports. The cover is configured to be mounted onto a pre-defined mounting surface within the main housing to close at least a portion of the opening. The object port is configured to guide gas in a direction intersecting the flow direction of gas in the object adsorption chamber. The cover is configured to be mounted onto the main housing by rotating along a rotational direction to select an mounting angle from a plurality of mounting angles.

[0007] According to the configuration described above, the direction of the gas guiding the target port can change in conjunction with the rotation of the cover, and the cover can be selected from multiple mounting angles. Therefore, the orientation of the target port can be changed to multiple directions simply by setting the mounting angle of the cover. Thus, the orientation of the port can be easily changed in an evaporative fuel processing device where the opening and cover are fixed in the main housing.

[0008] In one embodiment of this disclosure, a rotation suppression part may also be included, which is configured to suppress the cover portion that has been installed on the main body housing from rotating along the rotation direction.

[0009] According to the configuration described above, the installation angle of the cover can be set before installation, and the rotation of the cover after installation can be prevented.

[0010] In one embodiment of this disclosure, a plurality of first engaging portions and a plurality of second engaging portions may be provided. The plurality of first engaging portions are disposed on the main body housing. The plurality of second engaging portions are disposed on the cover portion and configured to engage with the plurality of first engaging portions respectively. The plurality of first engaging portions and the plurality of second engaging portions may be respectively configured in a rotationally symmetrical position when rotated along the rotational direction.

[0011] According to the configuration described above, the mounting angle of the cover can be set at each position where the plurality of first engaging parts and the plurality of second engaging parts can engage. Attached Figure Description

[0012] Figure 1 This is a perspective view showing an embodiment of an evaporative fuel processing apparatus.

[0013] Figure 2 yes Figure 1 Sectional view II-II of the evaporative fuel processing unit.

[0014] Figure 3A This is an enlarged sectional view of the area near the sub-chamber.

[0015] Figure 3B This is a right-side view near the sub-chamber.

[0016] Figure 4A This is a three-dimensional view when the cover is set at an angle of 180 degrees.

[0017] Figure 4B This is a three-dimensional view when the cover is set at a 90-degree angle.

[0018] Figure 4C This is a three-dimensional view when the cover is set at an angle of -90 degrees.

[0019] Figure 5A This is a perspective view showing the cover of the evaporative fuel processing apparatus in the first modified example with the cover angle set at 0 degrees.

[0020] Figure 5B This is a three-dimensional view when the cover is set at an angle of 180 degrees.

[0021] Figure 5C This is a three-dimensional view when the cover is set at a 90-degree angle.

[0022] Figure 5D This is a three-dimensional view when the cover is set at an angle of -90 degrees.

[0023] Figure 6AThis is a perspective view showing the evaporative fuel processing apparatus of the second modified example.

[0024] Figure 6B This is a perspective view showing the evaporative fuel processing apparatus of the third modified example. Detailed Implementation

[0025] Exemplary embodiments of this disclosure will now be described with reference to the accompanying drawings.

[0026] [1. Implementation Method]

[0027] [1-1. Structure]

[0028] Figure 1 , Figure 2 , Figure 3A ,as well as Figure 3B The evaporative fuel treatment device 1A shown functions as a known filter canister. That is, it has the function of adsorbing and desorbing evaporative fuel generated in the vehicle's fuel tank (not shown). The evaporative fuel treatment device 1A includes a main body housing 2 and a cover 70.

[0029] The main body shell 2 is the shell that forms the internal space. The main body shell 2 is, for example, a shell made of synthetic resin. However, the material of the main body shell 2 is not limited to this.

[0030] The main housing 2 includes a filling port 21, a purge port 22, an atmospheric port 23, and a secondary chamber 60. Ports 21 to 23 are located on the same side of the main housing 2 (e.g., Figure 1 (The upper side of the port). Furthermore, the port orientation (hereinafter referred to as port direction) of these ports 21-23 is set to the same orientation. Here, port orientation refers to the direction in which the gas discharged from the port is guided. Additionally, atmospheric port 23 corresponds to an example of an object port.

[0031] Furthermore, the gas referred to herein is the gas circulating inside the evaporative fuel processing device 1A, and is a gas that may contain both atmospheric air and evaporative fuel.

[0032] In the following text, the side of the main housing 2 that has the filling port 21, the purge port 22, and the atmospheric port 23 will be referred to as the port side. The main housing 2 has an opening 26 on the opposite side of the port side. This opening 26 is closed by a cap 27 that functions as an end cap.

[0033] The filling port 21 is connected to the vehicle's fuel tank via a pipeline. The filling port 21 is configured to introduce evaporative fuel generated in the fuel tank into the evaporative fuel treatment device 1A.

[0034] The purge port 22 is connected to the intake manifold (not shown) of the vehicle's engine via a purge valve. The purge port 22 is configured to discharge evaporated fuel from the evaporated fuel treatment device 1A and supply it to the engine.

[0035] An atmospheric vent 23 is disposed on the cover portion 70. The cover portion 70 has a direction conversion section 75, which will be described later, and the atmospheric vent 23 is connected to the direction conversion section 75 of the cover portion 70. The atmospheric vent 23 is open to the atmosphere. The atmospheric vent 23 allows the gas after the evaporated fuel has been removed to be discharged into the atmosphere. In addition, the atmospheric vent 23 desorbs (i.e., purges) the evaporated fuel adsorbed by the evaporated fuel treatment device 1A by introducing external gas (i.e., purge gas).

[0036] like Figure 2 As shown, the internal space of the main body shell 2 is divided into chamber 1 2A, chamber 2B, and chamber 3 2C.

[0037] As an example, chamber 2A is generally rectangular or cylindrical. The end of chamber 2A located on the port side is connected to the filling port 21 and the purge port 22. Furthermore, a first filter 32 is disposed at the end of chamber 2A located on the port side. A second filter 33 is disposed at the end of chamber 2A located on the cap 27 side. Adsorbent material 40 is disposed between the first filter 32 and the second filter 33. As an example, adsorbent material 40 is an aggregate of multiple particles. The particles are granular activated carbon. The particles are generated by mixing powdered activated carbon with a binder and shaping it into a predetermined shape. Alternatively, adsorbent materials other than granular materials, such as powdered activated carbon, may also be disposed in chamber 2A.

[0038] The end of chamber 2A located on the cap 27 side communicates with chamber 2B. Inside the main body shell 2, various gases, including gases containing evaporated fuel, travel back and forth between chamber 2A and chamber 2B.

[0039] The second chamber 2B is an elongated space extending from the end located on the cap 27 side toward the atmospheric opening 23. As an example, the second chamber 2B is generally cuboid or cylindrical. The end of the second chamber 2B located on the port side communicates with the third chamber 2C. Furthermore, a first filter 38 is disposed at the end of the second chamber 2B located on the cap 27 side. A second filter 54 is disposed at the end of the second chamber 2B located on the port side. In the second chamber 2B, an adsorbent material 43 is disposed between the first filter 38 and the second filter 54. Furthermore, the type of adsorbent material 43 can be the same as or different from the adsorbent material 40.

[0040] A third chamber 2C is formed in the sub-chamber 60. The third chamber 2C is the space adjacent to the second filter 54 side of the second chamber 2B.

[0041] like Figure 3A as well as Figure 3B As shown, the sub-chamber 60 has an abutment portion 61, an adsorbent 62, a filter 63, an opening 65, a first engaging portion 66A, a retaining portion 68, a stepped portion 68A, and a large-diameter portion 69. The adsorbent 62 is inserted into the third chamber 2C through the opening 65.

[0042] The third chamber 2C within the sub-chamber 60 is formed such that its volume (both the volume of its internal space and its external shape) is smaller than that of the adjacent second chamber 2B. That is, if the second chamber 2B is considered as the main chamber with a relatively larger volume, then the third chamber 2C is a sub-chamber with a relatively smaller volume.

[0043] The contact portion 61 is the part that contacts the adsorbent 62 inserted into the third chamber 2C from the opening 65. The contact portion 61 holds the adsorbent 62 in place by contacting it. The contact portion 61 is located on the far side in the insertion direction of the adsorbent 62. Figure 3A The position of the adsorbent 62 is defined by forming a transition space 64 on the left side of the image. The transition space 64 will be described below.

[0044] Adsorbent 62 can be exemplified by activated carbon units. Examples of activated carbon units include granular activated carbon, shaped activated carbon in a rock or honeycomb shape, and activated carbon formed from fibrous activated carbon into sheet, cuboid, cylindrical, or prismatic shapes. Furthermore, adsorbent 62 can be in a modular form or other forms.

[0045] In the aforementioned chambers 1A and 2B, the main flow direction of the gas (hereinafter referred to simply as the flow direction) is from the first filters 32 and 38 toward the second filters 33 and 54, or the opposite direction (i.e., Figure 2 (The direction indicated by the dashed arrow B in the diagram is up and down). However, a conversion space 64 is provided in the third chamber 2C where the flow direction is reversed. In this conversion space 64, the gas flow direction is either reversed to move towards the cover 70 or reversed to the opposite direction. That is, in the third chamber 2C, the flow direction is either from the conversion space 64 towards the cover 70 or the opposite direction (i.e., Figure 2 (The direction indicated by the dashed arrow C in the diagram). In other words, the flow direction in chamber 3, 2C intersects with the flow directions in chambers 1, 2A and 2B. That is, the flow direction in chamber 3, 2C is... Figure 2 The vertical direction is orthogonal to the horizontal direction.

[0046] Filter 63 is disposed on one side of the cover portion 70 of adsorbent 62. Figure 3A(Right side of the middle section). Furthermore, the surface of the adsorbent 62 located on the filter 63 side is on the same plane as the surface of the stepped portion 68A located on the cover portion 70 side, i.e., the mounting surface 69A. That is, the height of the adsorbent 62 along the insertion direction is the same as the height from the contact portion 61 to the mounting surface 69A in the sub-chamber portion 60.

[0047] The filter 63 is configured to withstand pressure from the cover 70 when the cover 70 is installed on the sub-chamber 60. Therefore, the adsorbent 62 is kept immobile by the pressure from the filter 63 and the reaction force from the abutment 61.

[0048] The holding part 68 is the portion that holds the outer periphery of the adsorbent 62, which is the portion of the adsorbent 62 surrounding the insertion direction (e.g., Figure 3A (The upper and lower portions of the adsorbent 62). In other words, the outer periphery surrounding the insertion direction is the outer periphery of the adsorbent 62 that is parallel to the gas flow direction. The inner surface of the holding portion 68 is formed into a cylindrical shape along the outer periphery of the adsorbent 62. With the structure described above, the outer periphery of the adsorbent 62 surrounding the insertion direction is formed to abut against the holding portion 68 of the main housing 2.

[0049] The large-diameter portion 69 is positioned to expand relative to the retaining portion 68 toward the adsorbent 62 on the opposite side (i.e., the side further outward than the retaining portion 68) and is arranged around the cover portion 70. That is, the large-diameter portion 69 has an outer diameter larger than the outer diameter of the retaining portion 68.

[0050] Step portion 68A is the part that forms a step connecting retaining portion 68 and large-diameter portion 69. Step portion 68A forms a surface perpendicular to both retaining portion 68 and large-diameter portion 69. The inner surface of step portion 68A ( Figure 3A The surface located on the right side is the mounting surface 69A (joining surface) between the main body housing 2 and the cover 70.

[0051] The opening 65 is formed to allow the third chamber 2C to communicate with the atmosphere. The opening 65 is the end of the large-diameter portion 69 located on the opposite side of the stepped portion 68A.

[0052] The cover 70 closes at least a portion of the opening 65. For example... Figure 3A as well as Figure 3B As shown, the cover 70 includes a disc-shaped main body 71, a tube 72 connected to the main body 71, and a direction conversion part 75. The open end of the tube 72 forms an atmospheric vent 23.

[0053] A sealing member 78 is disposed on the outer periphery of the cover 70 between it and the large-diameter portion 69. Furthermore, in the cover 70, the vent 23 is configured to communicate with the main body housing 2 via a direction-changing portion 75. The direction-changing portion 75 is generally cuboid in shape and has an internal space for gas flow. In the direction-changing portion 75, one of the generally cuboid faces the main body portion 71 of the cover 70 (i.e., the generally circular portion), and at any position on one of the four adjacent sides, the vent 23 is arranged such that it faces a direction orthogonal to that side. Furthermore, in the direction-changing portion 75, the side with the vent 23 and the orientation of the vent 23 may intersect without being orthogonal. Moreover, the direction-changing portion 75 is configured to connect the main body portion 71 of the cover 70 and the pipe portion 72 while ensuring airtightness.

[0054] The sealing member 78 is configured to seal the entire circumference between the opening 65 and the cover 70. The sealing member 78 is an annular component. The annular shape includes circular, elliptical, polygonal, etc., and is formed to surround the entire circumference of the hole.

[0055] The sealing member 78 may be, for example, an O-ring. The sealing member 78 seals the outer periphery of the cover portion 70 in the opening 65 without gaps. However, the cover portion 70 is provided with an atmospheric port 23 that communicates with the atmosphere. The opening 65 is not closed at the atmospheric port 23 and remains open.

[0056] Furthermore, the atmospheric vent 23 can be connected to any module, such as the ELCM (Evaporative Leak Check Module). The ELCM is a module used to detect leaks in the evaporative fuel processing unit 1A.

[0057] The cover 70 is configured to be fixed to the main body housing 2 by a snap-fit ​​structure 80A. The snap-fit ​​structure 80A corresponds to an example of the rotation-inhibiting part in this disclosure. The snap-fit ​​structure 80A is a structure in which the protrusion is embedded into the recess by utilizing the elasticity of the material for fixation. In this embodiment, the cover 70 is installed to the main body housing 2 by the engagement of the first engaging portion 66A and the second engaging portion 73A. The first engaging portion 66A is a recess provided on the outer periphery of the large-diameter portion 69 in the main body housing 2. The second engaging portion 73A is a protrusion provided on the outer periphery of the cover 70.

[0058] With the structure described above, if the cover 70 is inserted along the large diameter portion 69, the second engaging portion 73A of the cover 70 bends towards the inner circumference. Furthermore, if the second engaging portion 73A is inserted into the first engaging portion 66A of the main body housing 2, the bending at that point is released, thereby maintaining the engaging state of the first engaging portion 66A and the second engaging portion 73A. That is, the cover 70 is fixed to the main body housing 2.

[0059] In the example of this implementation, such as Figure 3B As shown, it has four snap-fit ​​structures 80A. If the direction in which the cover 70 rotates along the mounting surface 69A is defined as the rotation direction R (refer to...). Figure 3B The latching structures 80A are arranged in a rotationally symmetrical position when rotated along the rotational direction. That is, dividing 360 degrees by the number of latching structures 80A, which is four, yields 90 degrees, and the latching structures 80A are arranged at equal intervals of 90 degrees. Furthermore, the four latching structures 80A are configured such that any first engaging portion 66A can engage with any one of the second engaging portions 73A. In this embodiment, all the first engaging portions 66A are formed with the same shape, and all the second engaging portions 73A are also formed with the same shape.

[0060] Here, the atmospheric vent 23 provided in the cover 70 is configured to guide gas in a direction intersecting with the gas flow direction in the third chamber 2C. In this embodiment, the atmospheric vent 23 can be oriented in any direction along the mounting surface 69A between the cover 70 and the main housing 2.

[0061] Because of its structure as described above, the cover 70 can be rotated along the rotation direction R before engaging with the main body housing 2, allowing selection of one mounting angle from multiple mounting angles. After selecting the mounting angle, the cover 70 is then mounted to the main body housing 2. Furthermore, the mounting angle refers to the rotation angle relative to a reference direction (e.g., an angle positive for rightward rotation). Figure 1 As shown, if the reference direction is set to the case where the atmospheric port 23 faces the same direction as the filling port 21 and the purging port 22, then as follows: Figure 4A As shown, when the atmospheric port 23 faces the opposite direction to the filling port 21 and the purging port 22, the installation angle is 180 degrees. Furthermore, as... Figure 4B , Figure 4C As shown, with the atmospheric opening 23 rotated 90 degrees from the reference direction, the installation angle is 90 degrees or -90 degrees. That is, in the structure with four snap-fit ​​structures 80A, an installation angle can be selected from four installation angles.

[0062] like Figure 3B As shown, the snap-fit ​​structure 80A is used to prevent the installed cover 70 from rotating in the rotation direction R.

[0063] Here, in the evaporative fuel processing apparatus 1A, the cover 70 presses against the adsorbent 62 via the filter 63 and is mounted on the main housing 2. Therefore, the cover 70 and the adsorbent 62 are positioned close to each other. In other words, the cover 70 is positioned on the path of the adsorbent 62 as it moves toward the opening 65 (i.e., it is positioned relative to the adsorbent 62 towards the opening 65). Furthermore, the cover 70 also has the function of suppressing the movement of the adsorbent 62 by pressing it against the opening 65 side.

[0064] Furthermore, in the above embodiment, the snap-fit ​​structure 80A has the function of preventing the cover 70 from rotating after installation. However, it is also possible to use other structures different from the snap-fit ​​structure 80A to prevent the cover 70 from rotating after installation. For example, a structure that generates greater friction through an O-ring can be used to prevent the cover 70 from rotating after installation. Alternatively, the mounting surface 69A of the main body housing 2 can be formed as a polygon, and the cover 70 can be formed as a polygon that matches the shape of the mounting surface 69A. With the above-described configuration, as long as the cover 70 can be fixed to the main body housing 2, the snap-fit ​​structure 80A may not be necessary.

[0065] In the above embodiment, a snap-fit ​​structure 80A is used to assemble the cover 70 and the main body shell 2, but this configuration is not limited to. For example, a configuration in which one or more first engaging parts 66A engage with second engaging parts 73A may be used, or a configuration using adhesives or the like may be employed.

[0066] [1-2. Effects]

[0067] Based on the implementation methods detailed above, the following effects can be achieved.

[0068] (1a) The evaporative fuel processing apparatus 1A includes a main body housing 2, a cover 70, and multiple ports 21-23. The main body housing 2 includes multiple adsorption chambers 2A-2C and an opening 65. The multiple adsorption chambers 2A-2C are configured to respectively house adsorbent material. The opening 65 is configured to communicate one of the multiple adsorption chambers 2A-2C, i.e., the target adsorption chamber, with the atmosphere. The cover 70 includes an atmospheric port 23, which is one of the multiple ports 21-23. The cover 70 is configured to be installed onto a pre-set mounting surface 69A in the main body housing 2 to close at least a portion of the opening 65. The atmospheric port 23 is configured to guide gas in a direction intersecting with the flow direction of the gas in the target adsorption chamber. Before being installed onto the main body housing 2, the cover 70 is rotated along the rotation direction R to select an installation angle from multiple installation angles and then installed onto the main body housing 2.

[0069] According to the configuration described above, (i) the direction of the gas guided by the atmospheric port 23 can change in conjunction with the rotation of the cover 70; and (ii) the cover 70 can be selected from multiple mounting angles. Therefore, the orientation of the atmospheric port 23 can be changed to multiple directions simply by setting the mounting angle of the cover 70. Thus, the orientation of the port can be easily changed in the evaporative fuel processing device 1A in which the opening 65 and the cover 70 are fixed in the main housing 2.

[0070] (1b) In one embodiment of this disclosure, a snap-fit ​​structure 80A is also provided. The snap-fit ​​structure 80A is configured to prevent the cover 70, which has been installed onto the main housing 2, from rotating in the rotation direction R.

[0071] According to the configuration described above, the installation angle of the cover 70 can be set before installation, and the rotation of the cover 70 after installation can be prevented.

[0072] (1c) In one embodiment of this disclosure, a plurality of first engaging portions 66A and a plurality of second engaging portions 73A are further included. The plurality of first engaging portions 66A are disposed on the main body housing 2. The plurality of second engaging portions 73A are disposed on the cover portion 70 and configured to engage with the plurality of first engaging portions 66A respectively. The plurality of first engaging portions 66A and the plurality of second engaging portions 73A can each be disposed in a rotationally symmetrical position when rotated along the rotation direction R.

[0073] According to the configuration described above, the mounting angle of the cover 70 can be set at each position where the plurality of first engaging portions 66A and the plurality of second engaging portions 73A can engage.

[0074] [2. Other Implementation Methods]

[0075] The embodiments of this disclosure have been described above. However, this disclosure is not limited to the above embodiments and can be modified and implemented in various ways.

[0076] (2a) The snap-fit ​​structure 80A used in the above embodiments can be a snap-fit ​​structure of any shape. In addition, any locking mechanism that is not a snap-fit ​​structure and is configured to fix the cover 70 and the main body housing 2 can also be used.

[0077] (2b) In the above embodiment, the cap 70 is positioned from the side furthest from the filling port 21 ( Figure 2 The sub-chamber 60 is mounted to the main housing 2 near the filling port 21 on the right side of the sub-chamber 60. However, this configuration is not limited to this one. For example, the sub-chamber 60 may be replaced by something else. Figures 5A to 5D The second modified example of the evaporative fuel processing apparatus 1B shows a secondary chamber 60B. The secondary chamber 60B is configured such that a cover 70 is mounted from the port side.

[0078] In this configuration, the cover 70 can also be selected from multiple mounting angles. For example... Figure 5A As shown, if the direction of the atmospheric vent 23 facing the filling vent 21 is taken as the reference direction, then as... Figure 5B As shown, when the atmospheric vent 23 faces the opposite direction to the filling vent 21, the installation angle is 180 degrees. Furthermore, as... Figure 5C , Figure 5D As shown, with the atmospheric vent 23 rotated 90 degrees from the reference direction, the installation angle is 90 degrees or -90 degrees.

[0079] (2c) In the above embodiment, the auxiliary chamber 60 has four first engaging portions 66A, and the cover 7 has four second engaging portions 73A. Thus, the evaporative fuel processing device 1A has four snap-fit ​​structures 80A. However, this configuration is not limited to this arrangement. For example... Figure 6A As shown in the second modified example of the evaporative fuel processing apparatus 1C, it may also include six snap-fit ​​structures 80A. That is, the evaporative fuel processing apparatus 1C may include a sub-chamber 60C and a cover 70C. The sub-chamber 60C has six first engaging portions 66A, and the cover 70C has six second engaging portions 73A. The six snap-fit ​​structures 80A are arranged at 60-degree intervals and are all formed with the same shape.

[0080] (2d) Similarly, for example Figure 6B As shown in the third modification of the evaporative fuel processing apparatus 1D, it may also include three snap-fit ​​structures 80A. That is, the evaporative fuel processing apparatus 1D may also include a sub-chamber 60D and a cover 70D. The sub-chamber 60D has three first engaging portions 66A, and the cover 70D has three second engaging portions 73A. The three snap-fit ​​structures 80A are arranged at 120-degree intervals and are all formed with the same shape.

[0081] (2e) In the above embodiment, the plurality of snap-fit ​​structures 80A are all formed in the same shape; however, this configuration is not limited to this. The plurality of first engaging portions 66A can be formed in any shape as long as they can engage with the plurality of second engaging portions 73A. The number of first engaging portions and the number of second engaging portions can be the same or different. For example, the number of first engaging portions 66A can be set to be greater than the number of second engaging portions 73A.

[0082] (2f) Multiple functions of one constituent element in the above embodiments can be implemented by multiple constituent elements, or one function of one constituent element in the above embodiments can be implemented by multiple constituent elements. Alternatively, multiple functions of multiple constituent elements can be implemented by one constituent element, or one function can be implemented by one constituent element through multiple constituent elements. Furthermore, a portion of the structure of the above embodiments can be omitted. At least a portion of the structure of the above embodiments can be added to the structure of other embodiments, or at least a portion of the structure of the above embodiments can be substituted with the structure of other embodiments. Additionally, all embodiments of the technical concept defined by the statements in the claims are embodiments of this disclosure.

[0083] (2g) In addition to the evaporative fuel processing apparatus 1A described above, this disclosure can be implemented in various other ways, such as systems incorporating the evaporative fuel processing apparatus 1A and evaporative fuel processing methods.

Claims

1. An evaporative fuel processing device having multiple ports, characterized in that, It has a main shell and a cover. The main body shell includes: Multiple adsorption chambers, each configured to house an adsorbent material; and An opening is provided, configured to communicate with the target adsorption chamber of the plurality of adsorption chambers and the outside of the evaporative fuel processing device, wherein the target adsorption chamber is one of the plurality of adsorption chambers. The cover has an object port, which is one of the plurality of ports. The cover is configured to have a pre-defined mounting surface that is fitted into the main housing to close at least a portion of the opening. The target port is configured to guide the gas in a direction intersecting with the flow direction of the gas in the target adsorption chamber. The direction in which the cover rotates along the mounting surface is defined as the rotation direction. The cover is configured to be rotated along the rotation direction before being installed onto the main body housing, thereby selecting an installation angle from a plurality of installation angles and installing it onto the main body housing.

2. The evaporative fuel processing apparatus according to claim 1, characterized in that, It also includes a rotation suppression part, which is configured to suppress the cover portion that has been installed on the main body housing from rotating along the rotation direction.

3. The evaporative fuel processing apparatus according to claim 1 or 2, characterized in that, It also has multiple first-joint parts and multiple second-joint parts. The plurality of first engaging portions are disposed on the main body housing. The plurality of second engaging portions are disposed on the cover portion and configured to engage with the plurality of first engaging portions respectively. The plurality of first engaging portions and the plurality of second engaging portions are respectively configured in a rotationally symmetrical position when rotated along the rotation direction.

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