Canister

Abstract

To lighten a press-in load.SOLUTION: A canister which adsorbs and desorbs vaporized fuel produced in a fuel tank of a vehicle comprises an outside case, a connection port, an inside case, and at least one first projection part. The outside case has a space extending in a first direction inside. The connection port connects the inside and outside of the outside case. The inside case is a cylindrical member and an adsorbent which adsorbs the vaporized fuel is arranged inside. The first projection part projects out from an outer surface of the inside case. A fluid flows in the space in the first direction. The inside case is pressed in a portion forming the space in the outside case. The at least one first projection part abuts on an inner surface of a portion extending in the first direction, out of the portion forming the space in the outside case.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a canister. [Background technology]

[0002] Vehicles such as automobiles are equipped with canisters that prevent fuel vapor generated in the fuel tank from being released into the atmosphere. The canister is filled with an adsorbent material such as activated carbon. The fuel vapor generated in the fuel tank is introduced into the canister and temporarily adsorbed by the adsorbent material. When the internal combustion engine is started, the vapor is desorbed from the adsorbent material and supplied to the internal combustion engine.

[0003] Patent Document 1 discloses an evaporated fuel processing device in which a cylindrical adsorbent cartridge filled with an adsorbent is mounted inside a casing that constitutes a canister. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4173065 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the fuel vapor treatment device disclosed in Patent Document 1, multiple ribs are formed integrally with the flange around the periphery of the adsorbent cartridge. The edges of the flange and ribs are formed to follow the shape of the inner surface of the casing, and the flange and ribs are designed to slidably fit into the casing. Therefore, if the adsorbent cartridge were to be attached to the casing by press-fitting, the contact area between the adsorbent cartridge and the casing would be large, posing a problem of a large press-fit load during attachment.

[0006] One aspect of the present disclosure is to reduce press-fit loads. [Means for solving the problem]

[0007] One aspect of the present disclosure is a canister that adsorbs and desorbs evaporated fuel generated in a vehicle fuel tank, and includes an outer case, a connection port, an inner case, and at least one first protrusion. The outer case has a space extending in a first direction inside. The connection port connects the inside and the outside of the outer case. The inner case is a cylindrical member, and an adsorbent for adsorbing evaporated fuel is disposed inside. The first protrusion protrudes outward from the outer surface of the inner case. A fluid flows in the space in the first direction. The inner case is press-fitted inside a portion of the outer case that forms the space. The at least one first protrusion abuts against the inner surface of a portion of the outer case that forms the space and extends in the first direction.

[0008] According to such a configuration, when the inner case is attached to the outer case, the area where the inner case contacts the outer case is reduced due to the formation of the first protrusion. Therefore, the press-fitting load when press-fitting the inner case into the outer case can be reduced.

[0009] In one aspect of the present disclosure, the at least one first protrusion may be formed around an end portion of the inner case located on the side opposite to the side where the connection port is provided. According to such a configuration, when the inner case is attached to the outer case, the area of the portion where the first protrusion contacts the outer case is reduced. Therefore, the press-fitting load when press-fitting the inner case into the outer case can be reduced.

[0010] In one aspect of the present disclosure, the at least one first protrusion may be a plate-like portion extending along the first direction. According to such a configuration, when the inner case is attached to the outer case, the area where the first protrusion contacts the outer case is reduced. Therefore, the press-fitting load when press-fitting the inner case into the outer case can be reduced.

[0011] One aspect of the present disclosure may further include a sealing member that closes a gap between a peripheral portion of an end of an inner case located on a side where a connection port is provided and an inner surface of an outer case. According to such a configuration, the sealing performance of the gap between the inner case and the outer case can be improved.

[0012] One aspect of the present disclosure may further include at least one second protruding portion that protrudes outward from an outer peripheral surface of the inner case, has a gap with the outer case, and is formed along a first direction. According to such a configuration, when the inner case is attached to the outer case, the inclination of the inner case with respect to the outer case can be suppressed. Therefore, the attachment of the inner case and the outer case becomes easy.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0014] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. [1. First Embodiment] [1-1. Configuration] [1-1-1. Overall Configuration] The canister 1 shown in Fig. 1 is mounted on a vehicle such as an automobile, and suppresses the outflow of the evaporated fuel generated in the fuel tank of the vehicle to the outside of the vehicle by adsorbing the evaporated fuel. Further, the canister 1 takes in air from the outside of the vehicle to desorb the adsorbed evaporated fuel and allows the desorbed evaporated fuel to flow out to the internal combustion engine of the vehicle.

[0015] The canister 1 includes an outer case 10, a first chamber 11, a second chamber 12, a charge port 21, a purge port 22, an air port 23, a lid member 24, and a connection passage 13.

[0016] The outer case 10 is, for example, a substantially rectangular parallelepiped member formed of resin. Both the first chamber 11 and the second chamber 12 are portions that form spaces partitioned by an inner wall 101 inside the outer case 10. Both the first chamber 11 and the second chamber 12 extend in a first direction and are arranged side by side in a second direction orthogonal to the first direction. Hereinafter, a direction orthogonal to both the first direction and the second direction is defined as a third direction. The length of the first chamber 11 and the second chamber 12 in the first direction is not particularly limited, and may be longer, shorter, or the same as the length of the first chamber 11 and the second chamber 12 in the second direction or the third direction.

[0017] Both the charge port 21 and the purge port 22 are portions provided at a first end portion of the first chamber 11 in the first direction. Hereinafter, the side where the charge port 21 and the purge port 22 are provided in the first direction is referred to as a first side, and the opposite side of the first side in the first direction is referred to as a second side. The charge port 21 is connected to the fuel tank and is configured to take in the evaporated fuel into the interior of the first chamber 11. The purge port 22 is connected to the intake pipe of the internal combustion engine of the vehicle and is configured to allow the evaporated fuel to flow out from the interior of the first chamber 11.

[0018] The atmosphere port 23 is a part provided at the end on the first side in the second chamber 12. That is, the atmosphere port 23 is provided on the same side as the charge port 21 and the purge port 22 in the first direction. The atmosphere port 23 is connected to the outside of the vehicle and is configured to take in the atmosphere into the second chamber 12 or let it flow out from the inside of the second chamber 12.

[0019] The lid member 24 is a member that closes the end on the second side of the outer case 10. The connection passage 13 is a space formed between the first chamber 11 and the second chamber 12 and the lid member 24 inside the end on the second side of the outer case 10. The first chamber 11 and the second chamber 12 communicate with each other through the connection passage 13.

[0020] Inside the outer case 10, the first chamber 11, the connection passage 13, and the second chamber 12 form a substantially U-shaped flow path through which fluids such as evaporated fuel and atmosphere flow. The fluid flows along the first direction inside the first chamber 11 and the second chamber 12.

[0021] [1-1-2. Configuration Inside the Canister] At the end on the first side inside the first chamber 11, filters 42a and 42b supported by a plurality of struts 45 are arranged (Figure 1). Also, at the end on the second side inside the first chamber 11, a filter 42c supported by a grid 43a is arranged. A plurality of holes through which fluids such as evaporated fuel and atmosphere pass are formed in the grid 43a. The fluid flows into or out of the first chamber 11 through the filters 42a, 42b, and 42c.

[0022] Between the filters 42a and 42b and the filter 42c inside the first chamber 11, an adsorbent 41 for adsorbing evaporated fuel is filled. An example of the adsorbent 41 is activated carbon.

[0023] Between the grid 43a and the lid member 24, springs 44a and 44b, which are elastic members, are arranged to connect the two. The springs 44a and 44b bias the adsorbent 41 toward the charge port 21 and the purge port 22 via the grid 43a and the filter 42c.

[0024] The second chamber 12 has a second main chamber 121 and a second sub-chamber 122. The second main chamber 121 is open at the end on the second side in a state without the lid member 24. The second main chamber 121 is connected to the connection passage 13 on the second side and to the second sub-chamber 122 on the first side. The second sub-chamber 122 is connected to the second main chamber 121 on the second side and to the atmosphere port 23 on the first side.

[0025] The cross-section perpendicular to the first direction in the second main chamber 121 is substantially rectangular, and the cross-sectional area decreases from the second side toward the first side. The cross-section perpendicular to the first direction in the second sub-chamber 122 is smaller than the cross-section of the second main chamber 121.

[0026] An inner case 30 is mounted inside the second main chamber 121. The inner case 30 is filled with an adsorbent 41 inside and is a substantially rectangular parallelepiped-shaped member extending along the first direction. The length of the inner case 30 in the first direction is not particularly limited and may be longer, shorter, or the same as the length of the inner case 30 in the second or third direction. The inner case 30 is open at both ends on the first side and the second side. The first side of the inner case 30 is connected to the second sub-chamber 122. The second side of the inner case 30 is connected to the connection passage 13. The inner case 30 abuts against the inner surface of the second main chamber 121 at both ends on the first side and the second side. The contacting portion will be described later.

[0027] At the end of the first side inside the inner case 30, a filter 42d supported by a lattice portion 39 provided at the opening portion of the first side in the inner case 30 is disposed. Further, at the end of the second side in the inner case 30, a filter 42e supported by a grid 43b is disposed. Note that the filter 42e is not joined (e.g., welded) to the inner case 30, the grid 43b, etc., and is supported by claws protruding from the grid 43b. A plurality of holes through which fluids such as evaporated fuel and air pass are formed in the lattice portion 39 and the grid 43b. The fluid flows into or out of the inside of the inner case 30 through the filters 42d and 42e. Further, the fluid flows along the first direction inside the inner case 30.

[0028] Between the grid 43b and the lid member 24, springs 44c and 44d which are elastic members are disposed so as to connect the two. The springs 44c and 44d bias the adsorbent 41 toward the second sub-chamber 122 side (in other words, the atmosphere port 23 side) via the grid 43b and the filter 42e.

[0029] Inside the second sub-chamber 122, a honeycomb filter 46, a holding member 47, and a seal rubber 48 are disposed. The honeycomb filter 46 is a cylindrical adsorbent extending in the first direction and has a plurality of flow paths penetrating in the first direction. The honeycomb filter 46 is made of activated carbon as an example. The outer periphery of the first side of the honeycomb filter 46 is covered by a cylindrical holding member 47 (made of urethane as an example) that contacts the inner surfaces of the outer case 10 and the inner wall 101. On the other hand, the gap between the outer peripheral surface of the second side of the honeycomb filter 46 and the inner surfaces of the outer case 10 and the inner wall 101 is sealed by a cylindrical seal rubber 48. For this reason, the honeycomb filter 46 is supported by the holding member 47 and the seal rubber 48.

[0030] [1-1-3. Configuration of Inner Case] The inner case 30 has a first flange 31, a second flange 32, a first A protrusion 35a, a first B protrusion 35b, a second A protrusion 36a, and a second B protrusion 36b (Fig. 2).

[0031] The first flange 31 is a flange-like part protruding outward from the outer peripheral surface at the end of the first side of the inner case 30. A groove 37 is provided on the outer periphery of the first flange 31. A seal member 38, which is an elastic member, is mounted in the groove 37 (Fig. 1). The seal member 38 is, for example, an O-ring. In a state where the inner case 30 is mounted inside the second main chamber 121, the gap between the first flange 31 located at the end on the first side of the inner case 30 and the second main chamber 121 is sealed by the seal member 38.

[0032] The second flange 32 is a flange-like part protruding outward from the outer peripheral surface at the end of the second side of the inner case 30. Two outer peripheral surfaces of the inner case 30 perpendicular to the third direction are defined as the first side surfaces 33, and two outer peripheral surfaces of the inner case 30 perpendicular to the second direction are defined as the second side surfaces 34. The distance in the direction perpendicular to the outer peripheral surface from the outer peripheral surface of the inner case 30 is defined as the height.

[0033] The first A protrusion 35a is a part protruding outward from the inner case 30 from the end of the second side on the first side surface 33, and is a plate-like part extending along the first direction and the third direction. The first A protrusion 35a is connected to the surface of the first side of the second flange 32. In this embodiment, as an example, four first A protrusions 35a are provided, two on each of the two first side surfaces 33. Note that the first A protrusion 35a may be separated from the second flange 32.

[0034] The first protrusion 35a has a first tip 351a and a first inclined portion 352a. The first tip 351a is the end face of the first protrusion 35a in the third direction, extends substantially parallel to the first side face 33 along the first direction, and is a portion where the plate thickness decreases as it moves away from the first side face 33. In this embodiment, as an example, the cross-section of the first tip 351a perpendicular to the first direction is triangular. The first tip 351a is more fragile and easier to deform than other parts of the first protrusion 35a. The height of the first tip 351a is higher than the height of the end face of the second flange 32. The first inclined portion 352a is the end face of the first protrusion 35a and extends from the end on the first side of the first tip 351a toward the first side face 33. The first inclined portion 352a is inclined with respect to the first side face 33 such that the height of the first inclined portion 352a decreases as it moves toward the first side.

[0035] The second protrusion 36a protrudes in the third direction from the first side face 33 toward the outside of the inner case 30 and extends along the first direction from the end on the second side of the first side face 33 to the vicinity of the end on the first side of the first side face 33. The second protrusion 36a is connected to the first side surface of the second flange 32. In this embodiment, as an example, two second protrusions 36a are provided, one on each of the two first side faces 33. Note that the second protrusion 36a may be separated from the second flange 32.

[0036] The second protrusion 36a has a second tip 361a and a second inclined portion 362a. The second tip 361a is the end face of the second protrusion 36a in the third direction and is a portion that extends substantially parallel to the first side face 33 along the first direction. The height of the second tip 361a is lower than the height of the end face of the second flange 32. The second inclined portion 362a is the end face of the second protrusion 36a and extends from the end on the first side of the second tip 361a toward the first side face 33. The second tip 361a is inclined with respect to the first side face 33 such that the height of the second inclined portion 362a decreases as it moves toward the first side.

[0037] The first B protrusion 35b is a part that protrudes outward from the inner case 30 from the end on the second side of the second side surface 34, and is a plate-shaped part that extends along the first direction and the second direction. The first B protrusion 35b is connected to the surface on the first side of the second flange 32. In this embodiment, as an example, two first B protrusions 35b are provided, one on each of the two second side surfaces 34. Note that the first B protrusion 35b may be separated from the second flange 32.

[0038] The first B protrusion 35b has a first B tip portion 351b and a first B inclined portion 352b. The first B tip portion 351b is the end surface in the second direction of the first B protrusion 35b, extends substantially parallel to the second side surface 34 along the first direction, and is a part where the plate thickness decreases as it moves away from the second side surface 34. In this embodiment, as an example, the cross section of the first B tip portion 351b perpendicular to the first direction is triangular. The first B tip portion 351b is more fragile and easier to deform than other parts of the first B protrusion 35b. The height of the first B tip portion 351b is higher than the height of the end surface of the second flange 32. The first B inclined portion 352b is the end surface of the first B protrusion 35b, and extends from the end on the first side of the first B tip portion 351b toward the second side surface 34. The first B inclined portion 352b is inclined with respect to the second side surface 34 such that the height of the first B inclined portion 352b decreases as it moves toward the first side.

[0039] The second B protrusion 36b protrudes in the second direction from the second side surface 34 to the outside of the inner case 30, and is a plate-shaped part that extends along the first direction from the first B inclined portion 352b of the first B protrusion 35b to the vicinity of the end on the first side of the second side surface 34. The second B protrusion 36b has the same thickness as the first B protrusion 35b and is integrated. In this embodiment, as an example, two second B protrusions 36b are provided, one on each of the two second side surfaces 34. Note that the second B protrusion 36b may be separated from the first B protrusion 35b.

[0040] The second B protrusion 36b has a second B top portion 361b and a second B inclined portion 362b. The second B top portion 361b is an end surface in the second direction of the second B protrusion 36b, and is a portion that extends substantially parallel to the second side surface 34 along the first direction. The height of the second B top portion 361b is lower than the height of the end surface of the second flange 32. The second B inclined portion 362b is an end surface in the second B protrusion 36b, and extends from the end of the first side of the second B top portion 361b toward the second side surface 34. The second B top portion 361b is inclined with respect to the second side surface 34 such that the height of the second B inclined portion 362b decreases toward the first side.

[0041] In this embodiment, as an example, the thicknesses of the first A protrusion 35a, the first B protrusion 35b, the second A protrusion 36a, and the second B protrusion 36b are 2 to 3 millimeters. In a state where the inner case 30 is mounted in the second main chamber 121, the first A protrusion 35a, the first B protrusion 35b, and the seal member 38 are in contact with the inner surface of the second main chamber 121 (FIGS. 1 and 3). On the other hand, a gap 51 is formed between the second A protrusion 36a, the second B protrusion 36b, and the second flange 32 and the inner surface of the second main chamber 121 (FIGS. 1 and 4). Note that the ends on the first side of the second A protrusion 36a and the second B protrusion 36b may be in contact with the inner surface of the second main chamber 121.

[0042] [1-1-4. Mounting process of inner case] The manufacturing method of the canister 1 includes a first step of not performing press-fitting and a second step of performing press-fitting as steps of mounting the inner case 30 inside the second main chamber 121.

[0043] First, in the first step, the first flange 31 (that is, the first side) of the inner case 30 is inserted into the opening at the end of the second side of the second main chamber 121 in the outer case 10. Thereafter, the inner case 30 is inserted into the second main chamber 121 toward the first side in the first direction until the first A protrusion 35a and the first B protrusion 35b come into contact with the end of the second side in the second main chamber 121.

[0044] Next, in the second step following the first step, the inner case 30 is press-fitted into the interior of the second main chamber 121 toward the first side in the first direction. The means for performing the press-fitting is not particularly limited. In this embodiment, as an example, the press-fitting is performed by air pressure using a general press-fitting machine. Hereinafter, the first A tip 351a of the first A protrusion 35a, the first B tip 351b of the first B protrusion 35b, and the seal member 38 attached to the groove 37 on the outer periphery of the first flange 31 are taken as the press-fitting portions. The press-fitting portions are deformed by being pressed against the inner surface of the second main chamber 121 by the press-fitting. On the other hand, the second A protrusion 36a, the second B protrusion 36b, and the second flange 32 are not deformed by being pressed against the inner surface of the second main chamber 121. The inner case 30 is press-fitted into the interior of the second main chamber 121 until the surface on the first side of the first flange 31 abuts against the inner surface of the end portion on the first side in the second main chamber 121.

[0045] In the first step and the second step, the inner case 30 can be inserted into the second main chamber 121 so that the second A protrusion 36a and the second B protrusion 36b do not contact the inner surface of the second main chamber 121. However, due to hand tremors or the like during insertion, the second A protrusion 36a or the second B protrusion 36b may contact the inner surface of the second main chamber 121.

[0046] [1-2. Action, Effect] According to the embodiment described in detail above, the following actions and effects can be obtained. (1a) Among the steps of mounting the inner case 30 inside the second main chamber 121, in the second step of performing the press-fitting, the first A tip 351a of the first A protrusion 35a and the first B tip 351b of the first B protrusion 35b are deformed by being pressed against the inner surface of the second main chamber 121 by the press-fitting. Also, in the state where the inner case 30 is mounted inside the second main chamber 121, the first A protrusion 35a and the first B protrusion 35b contact the inner surface of the second main chamber 121.

[0047] On the one hand, the second A protrusion 36a, the second B protrusion 36b, and the second flange 32 are not pressed against the inner surface of the second main chamber 121 and deformed. Also, in a state where the inner case 30 is mounted inside the second main chamber 121, the second A protrusion 36a, the second B protrusion 36b, and the second flange 32 do not contact the inner surface of the second main chamber 121.

[0048] Here, the load required when press-fitting the inner case 30 into the second main chamber 121 (hereinafter referred to as the press-fitting load) is the frictional force at the contact portion between the inner case 30 (including the seal member 38) and the second main chamber 121. According to the configuration as described above, the press-fitting load when mounting the inner case 30 into the second main chamber 121 is the frictional force at the contact portion between the first A tip 351a, the first B tip 351b, and the seal member 38 and the inner surface of the second main chamber 121. On the other hand, the influence of the second A protrusion 36a, the second B protrusion 36b, and the second flange 32 on the press-fitting load is non-existent or very small. Therefore, the press-fitting load when press-fitting the inner case 30 into the second main chamber 121 can be reduced.

[0049] Also, generally, when a problem such as torsion occurs during the press-fitting of the seal member 38, the press-fitting load becomes larger than when no problem occurs. According to the configuration as described above, since the press-fitting load when no problem occurs can be reduced, the difference in the press-fitting load between when a problem occurs and when no problem occurs becomes larger, making it easier to detect the problem.

[0050] (1b) The first A tip 351a and the first B tip 351b that are deformed by press-fitting are provided at the end on the second side of the inner case 30. According to such a configuration, in the process of mounting the inner case 30 inside the second main chamber 121, the inner case 30 is inserted into the second main chamber 121 from the first side, and press-fitting is not performed until the first A protrusion 35a and the first B protrusion 35b contact the end on the second side of the second main chamber 121. Therefore, the period during which press-fitting is performed can be shortened.

[0051] (1c) The inner case 30 is press-fitted inside the second main chamber 121. In a state where the inner case 30 is attached to the second main chamber 121, the first A protrusion 35a, the first B protrusion 35b, and the seal member 38 are in contact with the inner surface of the second main chamber 121.

[0052] According to such a configuration, it is possible to suppress loosening in a state where the inner case 30 is attached inside the second main chamber 121. Therefore, it is possible to suppress rattling of the inner case 30 due to vehicle vibration or the like. In addition, it is possible to suppress pulverization of the adsorbent 41 such as activated carbon due to rattling of the inner case 30 caused by vehicle vibration or the like.

[0053] (1d) The first A protrusion 35a and the first B protrusion 35b are plate-like portions extending along the first direction. According to such a configuration, since the area of the portions where the first A protrusion 35a and the first B protrusion 35b contact the inner surface of the second main chamber 121 is reduced, the press-fitting load when press-fitting the inner case 30 into the second main chamber 121 can be reduced.

[0054] (1e) In the first step and the second step of attaching the inner case 30 inside the second main chamber 121, the inner case 30 can be inserted into the second main chamber 121 so that the second A protrusion 36a and the second B protrusion 36b do not contact the inner surface of the second main chamber 121. However, even if the second A protrusion 36a or the second B protrusion 36b contacts the inner surface of the second main chamber 121 due to hand tremors or the like during insertion, it may be acceptable.

[0055] According to such a configuration, even when the insertion direction of the inner case 30 is deviated from the first direction, the second A protrusion 36a or the second B protrusion 36b contacts the inner surface of the second main chamber 121, thereby restricting the deviation of the inner case 30 in the second direction and the third direction. Therefore, when inserting the inner case 30 into the second main chamber 121, it is possible to suppress the inclination of the inner case 30 with respect to the first direction, and the insertion of the inner case 30 into the second main chamber 121 becomes easy.

[0056] (1f) A seal member 38, which is an elastic member, is mounted in a groove 37 provided on the outer periphery of the first flange 31. In a state where the inner case 30 is mounted inside the second main chamber 121, the gap between the first flange 31 located at the end on the first side of the inner case 30 and the second main chamber 121 is sealed by the seal member 38.

[0057] According to such a configuration, the sealing performance of the gap between the first flange 31 and the second main chamber 121 can be improved. (1g) A filter 42e supported by a grid 43b is disposed at the end on the second side of the inner case 30. The filter 42e is not joined (for example, welded) to the inner case 30, the grid 43b, etc., and is supported by claws protruding from the grid 43b.

[0058] According to such a configuration, joining for supporting the filter 42e is unnecessary, so the manufacturing cost can be reduced. In the first embodiment, the atmosphere port 23 corresponds to an example of the connection port, and the second main chamber 121 corresponds to an example of a portion forming the space in the outer case.

[0059] [2. Second Embodiment] Since the basic configuration of the second embodiment is the same as that of the first embodiment, the differences will be described below. The same reference numerals as those in the first embodiment denote the same configurations, and refer to the preceding description.

[0060] In the first embodiment described above, both the first A protrusion 35a and the second A protrusion 36a were provided on the two first side surfaces 33. Also, both the first B protrusion 35b and the second B protrusion 36b were provided on the two second side surfaces 34. In contrast, in the second embodiment, the first A protrusion 35a and the second A protrusion 36a are both provided on one first side surface 33, and the first B protrusion 35b and the second B protrusion 36b are both provided on one second side surface 34, which is different from the first embodiment (FIG. 5).

[0061] Of the two first side surfaces 33, the surface on which the first A protrusion 35a and the second A protrusion 36a are provided is defined as the first non-contact surface 331, and the surface on which the first A protrusion 35a and the second A protrusion 36a are not provided is defined as the first contact surface 332. Also, of the two second side surfaces 34, the surface on which the first B protrusion 35b and the second B protrusion 36b are provided is defined as the second non-contact surface 341, and the surface on which the first B protrusion 35b and the second B protrusion 36b are not provided is defined as the second contact surface 342. There is a gap between the first non-contact surface 331 and the second non-contact surface 341 and the inner surface of the second main chamber 121. The first contact surface 332 and the second contact surface 342 are in surface contact with the inner surface of the second main chamber 121. In this embodiment, as an example, both the first A protrusion 35a and the second A protrusion 36a are provided one each on the first non-contact surface 331. Both the first B protrusion 35b and the second B protrusion 36b are provided one each on the second non-contact surface 341.

[0062] In the step of mounting the inner case 30 inside the second main chamber 121, the first contact surface 332 and the second contact surface 342 slide along the inner surface of the second main chamber 121. Also, the first contact surface 332 and the second contact surface 342 are not deformed by being pressed against the inner surface of the second main chamber 121.

[0063] [3. Other Embodiments] As described above, the embodiments of the present disclosure have been described. Needless to say, the present disclosure is not limited to the above embodiments and can take various forms.

[0064] (3a) In the above embodiment, the second main chamber 121 and the inner case 30 are substantially rectangular parallelepiped in shape, and the cross-section perpendicular to the first direction is substantially rectangular, but the present disclosure is not limited thereto. For example, the second main chamber 121 and the inner case 30 may be substantially polygonal prism in shape. Also, for example, the second main chamber 121 and the inner case 30 may be substantially cylindrical in shape. When the inner case 30 is a substantially cylindrical member, for example, three protrusions corresponding to the first A protrusion 35a or the first B protrusion 35b may be provided at equal intervals along the circumferential direction of the inner case 30 on the side surface of the inner case 30.

[0065] (3b) In the above-described embodiment, filters 42a, 42b, and 42c are arranged inside the first chamber 11, and an adsorbent 41 for adsorbing evaporated fuel is filled between the filters 42a and 42b and the filter 42c inside the first chamber 11. However, instead of the filters 42a, 42b, 42c and the adsorbent 41, an inner case 30 may be mounted inside the first chamber 11. Further, when the inner case 30 is mounted inside the first chamber 11, inside the second main chamber 121, instead of the inner case 30 being mounted, filters may be arranged on the first side and the second side, and the adsorbent 41 may be filled between the filters.

[0066] (3c) In the above-described embodiment, four first A protrusions 35a and four first B protrusions 35b are provided respectively, and two second A protrusions 36a and two second B protrusions 36b are provided respectively. However, at least one first A protrusion 35a and at least one first B protrusion 35b may be provided, and at least one second A protrusion 36a and at least one second B protrusion 36b may be provided.

[0067] Also, in the above-described embodiment, the first A protrusion 35a and the second A protrusion 36a are provided on the first side surface 33, but they may be provided on the second side surface 34. The first B protrusion 35b and the second B protrusion 36b are provided on the second side surface 34, but they may be provided on the first side surface 33.

[0068] (3d) In the above-described embodiment, both the first A protrusion 35a and the first B protrusion 35b are provided at the end of the second side of the inner case 30, but they may be provided on the outer peripheral surface of the inner case 30 other than the end of the second side.

[0069] (3e) In the above embodiment, the second A protruding portion 36a and the second B protruding portion 36b were plate-like portions extending along the first direction from the end portion on the second side to the vicinity of the end portion on the first side on the outer peripheral surface of the inner case 30, but the present invention is not limited thereto. For example, a plurality of second A protruding portions 36a and a plurality of second B protruding portions 36b may be provided, respectively, and may be arranged at intervals along the first direction from the end portion on the second side to the vicinity of the end portion on the first side on the outer peripheral surface of the inner case 30.

[0070] (3f) In the above embodiment, the fluid flows along the first direction both inside the first chamber 11 and the second chamber 12 in the outer case 10 and inside the inner case 30. However, the direction in which the fluid flows inside the inner case 30 may be other than the first direction. For example, the fluid flowing inside the inner case 30 may flow along the second direction or the third direction.

[0071] (3g) A plurality of functions of one component in the above embodiment may be realized by a plurality of components, or one function of one component may be realized by a plurality of components. Further, a plurality of functions of a plurality of components may be realized by one component, or one function realized by a plurality of components may be realized by one component. Further, a part of the configuration of the above embodiment may be omitted. Further, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of another above embodiment. [Technical idea disclosed in this specification] [Item 1] A canister that adsorbs and desorbs evaporated fuel generated in a fuel tank of a vehicle, An outer case having a space extending in a first direction inside, A connection port that connects the inside and the outside of the outer case, A cylindrical member, an inner case in which an adsorbent for adsorbing the evaporated fuel is disposed inside, At least one first protruding portion protruding outward from the outer surface of the inner case, Comprising In the space, fluid flows in the first direction, The inner case is press-fitted inside a portion of the outer case that forms the space, The at least one first protrusion abuts against the inner surface of a portion of the outer case that forms the space and extends in the first direction, Canister.

[0072] [Item 2] The canister according to Item 1, The at least one first protrusion is formed around an end of the inner case located on the side opposite to the side where the connection port is provided, Canister.

[0073] [Item 3] The canister according to Item 1 or Item 2, The at least one first protrusion is a plate-like part extending along the first direction, Canister.

[0074] [Item 4] The canister according to any one of Items 1 to 3, Further provided is a sealing member that closes a gap between a periphery of an end of the inner case located on the side where the connection port is provided and an inner surface of the outer case, Canister.

[0075] [Item 5] The canister according to any one of Items 1 to 4, Further provided is at least one second protrusion that protrudes outward from an outer peripheral surface of the inner case, has a gap with the outer case, and is formed along the first direction, Canister.

Description of Signs

[0076] 1…Canister, 10…Outer case, 21…Charge port, 22…Purge port, 23…Atmospheric port, 30…Inner case, 35a…First A protrusion, 35b…First B protrusion, 36a…Second A protrusion, 36b…Second B protrusion, 41…Adsorbent material.

Claims

1. A canister that adsorbs and desorbs evaporated fuel generated in a vehicle fuel tank, an outer case having a space extending in a first direction inside, a connection port connecting the inside and the outside of the outer case, a cylindrical member, an inner case in which an adsorbent for adsorbing the evaporated fuel is disposed inside, at least one first protrusion protruding outward from the outer surface of the inner case and substantially perpendicular to the outer surface of the inner case, comprising, in the space, fluid flows in the first direction, the inner case is press-fitted inside a portion of the outer case that forms the space, the at least one first protrusion, is a plate-like portion extending along the first direction, abuts against the inner surface of a portion of the outer case that forms the space and extends in the first direction, the plate thickness direction of the at least one first protrusion is a direction along the circumferential direction of the inner case, a canister.

2. The canister according to claim 1, wherein the at least one first protrusion is formed around an end portion of the inner case located on the side opposite to the side where the connection port is provided. a canister.

3. The canister according to claim 1, further comprising a sealing member that closes a gap between a peripheral portion of an end portion of the inner case located on the side where the connection port is provided and the inner surface of the outer case. a canister.

4. The canister according to any one of claims 1 to 3, further comprising at least one second protrusion that protrudes outward from the outer peripheral surface of the inner case, has a gap with the outer case, and is formed along the first direction. a canister.

5. The canister according to claim 4, wherein the inner case includes a first side end portion in the first direction and a second side end portion located on the side opposite to the first side end portion in the first direction, the at least one second protrusion, protrudes outward from the outer surface of the inner case and substantially perpendicular to the outer surface of the inner case, and extends from near the second side end portion to near the first side end portion along the first direction. a canister.

6. A canister that adsorbs and desorbs evaporated fuel generated in a vehicle fuel tank, an outer case having a space extending in a first direction inside, a connection port connecting the inside and the outside of the outer case, A cylindrical member including an inner case in which an adsorbent for adsorbing the evaporated fuel is disposed inside. At least one first protrusion protruding outward from the outer surface of the inner case. At least one second protrusion protruding outward from the outer surface of the inner case, having a gap with the outer case, and formed along the first direction. Comprising. In the space, fluid flows in the first direction. The at least one first protrusion abuts against the inner surface of a portion extending in the first direction among the portions forming the space in the outer case. The inner case Is press-fitted inside a portion forming the space in the outer case. Comprising a first side end portion in the first direction and a second side end portion located on the opposite side of the first side end portion in the first direction. The at least one second protrusion protrudes substantially perpendicular to the outer surface of the inner case from the outer surface of the inner case, and extends from near the second side end portion to near the first side end portion along the first direction. Canister.

7. The canister according to claim 6, The at least one first protrusion is formed around an end portion of the inner case located on the side opposite to the side where the connection port is provided. Canister.

8. The canister according to claim 6, Further comprising a sealing member that closes a gap between the periphery of the end portion of the inner case located on the side where the connection port is provided and the inner surface of the outer case. Canister.

9. The canister according to any one of claims 6 to 8 The at least one first protrusion is a plate-like portion extending along the first direction. Canister.

10. The canister according to claim 9, The at least one first protrusion Protrudes substantially perpendicular to the outer surface of the inner case from the outer surface of the inner case. The plate thickness direction of the at least one first protrusion is a direction along the circumferential direction of the inner case. Canister.

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