Canister Vent Solenoid Valve

Abstract

A canister vent solenoid valve (1) comprises: a valve portion (10) that opens and closes a passage that communicates with outside air; a filter portion (100, 100') provided in the passage between the valve part and the outside air; a first opening (110) through which outside air and a first internal passage connected to the valve portion communicate at an upper section of the filter portion; a second opening (120, 120') that is formed in the bottom section of the filter portion and through which outside air and a second internal passage connected to the first internal passage communicate; and a labyrinth structural component (130) that is disposed in the second internal passage between the first internal passage and the second opening.

Description

[Technical field]

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

[0002] Some canister vent solenoid valves have a filter section attached between the valve section and the outside air, as shown in Patent Document 1. The filter section removes foreign matter such as dust contained in the outside air when the outside air is taken in by the valve section, thereby preventing the foreign matter from flowing into the valve section. Specifically, for example, the filter device (8) and filter section (32) in Patent Document 1 are cylindrical, and are configured so that when outside air enters the inside, the air rotates in a circular or cyclone motion along the cylindrical inner surface (46). Substances mixed in the air are pushed against the inner wall by centrifugal force and collected in a dead air space (54) provided in the lower space of the filter section. The air from which the substances have been removed is taken out to the valve section (33) through an outlet port (56) provided near the axis of rotation of the air flow. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US 2009 / 0025693 A1 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the configuration shown in Patent Document 1 has a problem in that there is a high possibility that water will enter the valve section from the outlet port. For example, if a large amount of water enters the filter section or if water enters the filter section for a long period of time, water will accumulate in the space below the filter section and reach the position of the outlet port, and water will enter the valve section from the outlet port. If water enters the valve section, deterioration of the metal parts in the valve section will be accelerated.

[0005] The present disclosure is devised to solve the above-mentioned problems, and has an object to provide a structure in a canister vent solenoid valve that is capable of further suppressing the inflow of water into a valve portion. [Means for solving the problem]

[0006] The canister vent solenoid valve of the present disclosure includes a valve section which opens and closes a passage communicating with outside air, a filter section provided between the outside air in the passage and the valve section, a first opening in an upper part of the filter section which connects a first internal passage connected to the valve section with the outside air, a second opening formed in a lower bottom part of the filter section which connects a second internal passage connected to the first internal passage with the outside air, and a labyrinth structure component arranged in the second internal passage between the first opening and the second opening. The filter portion has a cylindrical shape having an outer tube portion and an inner tube portion arranged inside the outer tube portion, the labyrinth structure component has a first annular portion and a second annular portion and is arranged so that the outer circumference of the inner tube portion and the inner circumference of the first annular portion are in contact with each other, the inner diameter of the first annular portion is smaller than the inner diameter of the second annular portion, the inner diameter of the second annular portion is smaller than the outer diameter of the first annular portion, the outer diameter of the first annular portion is smaller than the outer diameter of the second annular portion, and a gap is provided between the first annular portion and the second annular portion by combining the first annular portion and the second annular portion. Effect of the Invention

[0007] Advantageous Effects of Invention The present disclosure provides an advantage in that it is possible to provide a structure for a canister vent solenoid valve that is capable of further suppressing the inflow of water into a valve portion. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a partially sectional perspective view for explaining the overall configuration of a canister vent solenoid valve according to the present disclosure. [Diagram 2]Fig. 2A is a perspective view of the filter portion as viewed in the direction of arrow a in Fig. 1. Fig. 2B is an enlarged view of the filter portion in Fig. 1. [Diagram 3] FIG. 3 is a perspective view showing the labyrinth structure part in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line cc in FIG. [Diagram 5] FIG. 5 is a cross-sectional perspective view showing another example of the configuration of the filter portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In order to explain the present disclosure in more detail, embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0010] Embodiment 1 FIG. 1 is a partially sectional perspective view for explaining the overall configuration of a canister vent solenoid valve 1 according to the present disclosure. The canister vent solenoid valve 1 shown in FIG.

[0011] The valve portion 10 opens and closes a passage communicating with the outside air. The valve unit 10 is a solenoid valve. The valve portion 10 communicates with a first internal passage in the filter portion 100 . A detailed description of the internal structure of the valve section 10 will be omitted here since known techniques can be applied. When the valve section 10 is handled separately from the filter section 100, it is also called a valve device.

[0012] The filter section 100 is provided in a passage between the outside air and the valve section 10 . When outside air is taken into the valve section 10 , the filter section 100 removes foreign matter such as dust contained in the outside air, thereby preventing the foreign matter from flowing into the valve section 10 . The filter unit 100 shown in Fig. 1 is shown in a state in which it is actually mounted on a vehicle and used, for example. In this state, the filter unit 100 has a lower filter portion 100b in the direction of gravity and an upper filter portion 100a in the direction opposite to the direction of gravity. In the description, the lower filter portion 100b and the upper filter portion 100a are, for example, the portion below the labyrinth structure component 130 disposed inside the filter unit 100 as the lower filter portion 100b, and the portion above the labyrinth structure component 130 as the upper filter portion 100a. When the filter section 100 is handled separately from the valve section 10, it is also called a filter device.

[0013] Fig. 2A is a perspective view of the filter unit 100 as viewed in the direction of the arrow a in Fig. 1. Fig. 2B is an enlarged view of the filter unit 100 in Fig. 1. The filter section 100 shown in FIGS. 2A and 2B has a cylindrical shape having an outer cylinder section 101 and an inner cylinder section 102 disposed inside the outer cylinder section 101. Specifically, the filter section 100 has an outer cylinder section 101 and an inner cylinder section 102. The central axis of the outer cylinder section 101 and the central axis of the inner cylinder section 102 are configured to be the same axis b. The diameter of the outer cylinder section 101 is larger than the diameter of the inner cylinder section 102. The inner cylinder section 102 is disposed inside the outer cylinder section 101. The filter section 100 also includes a lid section 103 which is an upper bottom section. The lid section 103 has an inner diameter larger than the outer diameter of the outer cylinder section 101, and is disposed so as to cover the upper section of the outer cylinder section 101. A gap is formed between the inner peripheral wall of the lid section 103 and the outer peripheral wall of the outer cylinder section 101, and opens downward. This forms a first opening section 110 which will be described next. The lid portion 103 is attached so as to cover the inner cylinder portion 102 and the outer cylinder portion 101 after a labyrinth structure component 130 and a filter material 140 (described later) are placed inside the filter portion 100 .

[0014] The filter portion 100 includes a first opening 110, a second opening 120, and a labyrinth structure component .

[0015] The first opening 110 communicates between the outside air and a first internal passage connected to the valve section 10 in the filter upper portion 100a of the filter section 100. In the first opening 110, a protrusion is formed on the outer peripheral wall of the outer cylindrical section 101, and is configured to prevent foreign matter or water from directly entering along the outer peripheral wall of the outer cylindrical section 101. The first internal passage is configured to communicate between the outside air and the valve section 10 via the first opening 110, an opening formed in the upper part of the outer tube section 101, an opening formed in the upper part of the inner tube section 102, and the inner tube section 102. A filter material 140 is disposed on the upper part of the inner cylindrical portion 102 so as to surround the outer periphery of the inner cylindrical portion 102. The filter material 140 is also disposed so as to be placed on the upper part of the labyrinth structure component 130. The filter material 140 is, for example, a foam such as urethane. The material of the filter material 140 is appropriately selected according to the specifications. The filter material 140 functions to prevent foreign matter or water from entering the inner cylindrical portion 102 between the opening formed on the upper part of the outer cylindrical portion 101 of the first internal passage and the opening formed on the upper part of the inner cylindrical portion 102.

[0016] The second opening 120 is formed in the lower base 104 of the filter unit 100 and connects the second internal passage connected to the first internal passage with the outside air. The second internal passage is a passage that communicates between the second opening 120 and the first internal passage. Specifically, the second internal passage is a passage that branches off from the first internal passage between the outer and inner cylindrical portions of the filter upper portion 100a, extends toward the filter lower portion 100b in the gravity direction (downward), and reaches the second opening 120. The filter part 100 having this second opening 120 is structured so that if water enters the inside of the filter part 100 through the first opening 110, the water can be drained through the second internal passage and the second opening 120.

[0017] The second internal passage has a tapered portion 124. The tapered portion 124 is a portion that extends at an angle toward the axis of the inner tube portion 102 of the filter portion 100 as the second internal passage progresses from the second opening 120. The tapered portion 124 can promote the drainage of water that has entered the second internal passage of the filter portion 100.

[0018] The opening area of ​​the second opening 120 is configured to be smaller than the opening area of ​​the first opening 110. The opening area is calculated, for example, using the minimum area of ​​the opening. This allows outside air to flow in more easily through the first opening 110 than through the second opening 120, and thus the intrusion of foreign matter through the second opening 120 can be suppressed.

[0019] The partition portion 122 is a partition provided in the second internal passage inside the filter portion 100, and extends from the lower bottom portion 104 of the filter portion 100 to a position where the labyrinth structure component 130 is disposed. The partition portion 122 functions as a seat surface on which the labyrinth structure component 130 is placed. In addition, the partition portion 122 functions as a rib that supplements the strength of the outer cylinder portion of the filter portion 100.

[0020] The labyrinth structural component 130 is disposed between the first opening 110 and the second opening 120. Specifically, the labyrinth structural component 130 is disposed between the first internal passage and the second opening 120 in the second internal passage. The labyrinth structure component 130 has a labyrinth structure. The labyrinth structure component 130 has a labyrinth structure, and functions to make the second internal passage a labyrinth and to hinder the flow in the second internal passage. For example, the labyrinth structure component 130 has a shape that blocks the passage so that the second opening 120 cannot be directly seen when viewed from the first opening 110 side in the second internal passage. Also, the labyrinth structure component 130 has a shape that blocks the passage so that the first opening 110 side cannot be directly seen when viewed from the second opening 120 side in the second internal passage.

[0021] The labyrinth structural component 130 will now be described further. FIG. 3 is a perspective view showing the labyrinth structure part 130 in FIG. FIG. 4 is a cross-sectional view taken along line cc in FIG. When the filter section 100 has a cylindrical shape with the inner cylindrical section 102 disposed inside the outer cylindrical section 101, the labyrinth structure component 130 has a first annular section 132 and a second annular section 134, as shown in Figures 3 and 4. The first annular section 132 and the second annular section 134 are integrally molded via a connecting section 136. The first annular section 132 and the second annular section 134 are configured such that the central axis of the first annular section 132 and the central axis of the second annular section 134 are coaxial with the central axis of the outer cylindrical section 101 and the central axis of the inner cylindrical section 102 described above. The labyrinth structure part 130 is disposed so that the outer periphery of the inner cylindrical part 102 in the filter part 100 and the inner periphery of the first annular part 132 are in contact with each other. In the labyrinth structure component 130 , the inner diameter d of the first annular portion 132 is smaller than the inner diameter f of the second annular portion 134 . In the labyrinth structure component 130 , the inner diameter f of the second annular portion 134 is smaller than the outer diameter e of the first annular portion 132 . In the labyrinth structure component 130 , the outer diameter e of the first annular portion 132 is smaller than the outer diameter g of the second annular portion 134 . The labyrinth structure component 130 has a gap between the first annular portion 132 and the second annular portion 134 . The labyrinth structure component 130 is configured by combining such a first annular portion 132 and a second annular portion 134 . In the description, the labyrinth structure component 130 has been shown to be configured using only one pair of the first annular portion 132 and the second annular portion 134, but it may also be configured by combining multiple pairs of the first annular portion 132 and the second annular portion 134.

[0022] The first annular portion 132 in the labyrinth structure component 130 has an inclined shape. Specifically, the first annular portion 132 has an inclined shape extending from the inner cylinder portion 102 toward the outer cylinder portion 101 from the upper portion to the lower portion of the second internal passage. More specifically, in a state in which the labyrinth structure component 130 is assembled to the filter portion 100, the first annular portion 132 has a shape extending from the outer peripheral wall of the inner cylinder portion 102 toward the inner peripheral wall of the outer cylinder portion 101 as it moves from the upper portion to the lower portion of the second internal passage. As an example of such a shape, the first annular portion 132 shown in the figure has a trapezoidal cross section. The second annular portion 134 in the labyrinth structure component 130 has an inclined shape. Specifically, the second annular portion 134 is disposed lower than the first annular portion 132, and has an inclined shape extending from the upper portion to the lower portion of the second internal passage from the outer cylinder portion 101 to the inner cylinder portion 102. More specifically, in a state in which the labyrinth structure component 130 is assembled to the filter portion 100, the second annular portion 134 is disposed closer to the lower bottom portion 104 of the filter portion 100 than the first annular portion 132, and has a shape extending from the inner peripheral wall of the outer cylinder portion 101 to the outer peripheral wall of the inner cylinder portion 102 as it moves from the upper portion to the lower portion of the second internal passage. As an example of such a shape, the second annular portion 134 shown in the figure has a triangular cross section. In the description, an example has been described in which the cross section of the first annular portion 132 is trapezoidal and the cross section of the second annular portion 134 is triangular, but the present disclosure is not limited to this example. The cross section of the first annular portion 132 may be triangular and the cross section of the second annular portion 134 may be trapezoidal. The cross sections of the first annular portion 132 and the second annular portion 134 may each be triangular. The cross sections of the first annular portion 132 and the second annular portion 134 may each be trapezoidal. Furthermore, the cross sections of the first annular portion 132 and the second annular portion 134 do not have to be triangular or trapezoidal. For example, they may be inverted L-shapes or inverted V-shapes with a portion of the triangular or trapezoidal shape cut out.

[0023] The labyrinth structure component 130 allows the pressure loss of the flow in the second internal passage to be set by appropriately setting conditions such as the inner diameter of the first annular portion 132, the outer diameter of the first annular portion 132, the inner diameter of the second annular portion 134, the outer diameter of the second annular portion 134, the opening area of ​​the gap between the first annular portion 132 and the second annular portion 134, the angle of the first annular portion 132 and the angle of the second annular portion 134 which form the gap, the cross-sectional shape of the first annular portion 132, and the cross-sectional shape of the second annular portion 134. For example, when the pressure loss in the passage from the second opening 120 to the valve section 10 via the second internal passage is designed to be twice as much as the pressure loss in the first internal passage from the first opening 110 to the valve section 10, it becomes possible to reduce the suction force of the outside air from the second opening 120 to approximately half the suction force of the outside air from the first opening 110. This makes it possible to further reduce the risk of water entering the valve section 10 from the second opening 120.

[0024] By having such a labyrinth structure component 130, the filter portion 100 can be structured so that water that has entered the second internal passage from the first opening 110 via the first internal passage is likely to collect from the first annular portion 132 to the second annular portion 134, and further, is likely to flow through the gap between the first annular portion 132 and the second annular portion 134 to the lower portion of the second internal passage and be drained from the second opening 120. Furthermore, even if water or foreign matter mixes with the outside air and enters the second internal passage from the second opening 120, the second annular portion 134 and the first annular portion 132 in the labyrinth structure component 130 are configured to obstruct the flow from the lower bottom portion 104 of the filter portion 100 to the upper portion, making it difficult for water and foreign matter to enter the first internal passage.

[0025] Here, another example of the configuration of the filter section 100 will be described. FIG. 5 is a cross-sectional perspective view showing another configuration example of the filter section 100. As shown in FIG. The filter unit 100' shown in Fig. 5 has a configuration in which a dust filter 150 is provided at the second opening 120'. The dust filter 150 is a mesh-shaped filter made of, for example, resin. The dust filter 150 is, for example, integrally molded with the filter unit 100'. Alternatively, the dust filter 150 is, for example, attached to the second opening 120' in the filter unit 100' using an adhesive or the like. The filter unit 100' equipped with the antidust filter 150 can be structured to reduce the intrusion of foreign matter from the second opening 120'. Furthermore, the filter unit 100' equipped with the antidust filter 150 can increase the pressure loss in the passage leading to the valve unit 10 via the second internal passage, and can further reduce the intrusion of water from the second opening 120' into the internal passage of the filter unit 100'. Furthermore, by employing the resin-molded dust-proof filter 150, productivity can be improved, and the canister vent solenoid valve 1 can be produced at low cost. The filter section 100' shown in FIG. 5 has the same configuration as the filter section 100 described above except that it is provided with an antidust filter 150, and therefore detailed description of the other configuration will be omitted.

[0026] The present disclosure will be compared with the conventional technology. In the conventional technology, there was a high possibility that water would enter the valve from the outlet port. This caused the deterioration of the metal parts in the valve to accelerate. In addition, the filter installed in the outlet port could be immersed in water, causing hydrolysis. As a result, the product life of the canister vent solenoid valve could be shortened. In contrast, the canister vent solenoid valve 1 including the filter unit 100 or the filter unit 100' of the present disclosure has the configuration described above, and therefore does not suffer from the problems associated with the prior art.

[0027] The present disclosure will be summarized and described below. The present disclosure discloses the following configuration. (1) A valve portion that opens and closes a passage communicating with the outside air; a filter section provided between the outside air in the passage and the valve section, a first opening portion that communicates a first internal passage connected to the valve portion at an upper portion of the filter portion with outside air; a second opening formed in a lower bottom portion of the filter portion and communicating a second internal passage connected to the first internal passage with outside air; a labyrinth structure component disposed in the second internal passage between the first internal passage and the second opening; Canister vent solenoid valve with. As a result, the present disclosure has an advantage of being able to provide a structure in a canister vent solenoid valve that is capable of further suppressing the inflow of water into the valve portion.

[0028] The present disclosure further discloses the following configuration. (2) the filter portion has a cylindrical shape including an outer cylinder portion and an inner cylinder portion disposed inside the outer cylinder portion, The labyrinth structure component has a first annular portion and a second annular portion, The inner cylindrical portion is disposed so that an outer periphery of the inner cylindrical portion is in contact with an inner periphery of the first annular portion, an inner diameter of the first annular portion is smaller than an inner diameter of the second annular portion; an inner diameter of the second annular portion is smaller than an outer diameter of the first annular portion; an outer diameter of the first annular portion is smaller than an outer diameter of the second annular portion; The first annular portion and the second annular portion are combined together so that a gap is formed between the first annular portion and the second annular portion. The canister vent solenoid valve according to (1) above. As a result, the present disclosure further provides an effect of being able to provide a structure suitable for a cylindrical filter portion in the canister vent solenoid valve.

[0029] The present disclosure further discloses the following configuration. (3) The labyrinth structure part comprises: In a state where the filter unit is assembled, the first annular portion has a shape approaching an inner circumferential wall of the outer tubular portion from an upper portion to a lower portion in the second internal passage, the second annular portion is disposed closer to a lower bottom portion of the filter than the first annular portion, and has a shape approaching a central axis of the inner tubular portion from an upper portion to a lower portion of the second internal passage. The canister vent solenoid valve according to (2) above. As a result, the present disclosure further has an effect of providing a structure in the canister vent solenoid valve that makes it easy to discharge water that has entered the filter portion from the first opening. Furthermore, it is possible to provide a structure for preventing water from entering through the second opening in the canister vent solenoid valve.

[0030] The present disclosure further discloses the following configuration. (4) the first internal passage is configured to communicate between the outside air and the valve portion via the first opening, an opening formed in an upper portion of the outer cylindrical portion, an opening formed in an upper portion of the inner cylindrical portion, and the inner cylindrical portion. The canister vent solenoid valve according to (2) or (3) above. As a result, the present disclosure further has an effect of being able to provide a structure in which the inner cylindrical portion provided inside the outer cylindrical portion serves as a passage.

[0031] The present disclosure further discloses the following configuration. (5) The opening area of ​​the second opening is smaller than the opening area of ​​the first opening. The canister vent solenoid valve according to (1), (2), or (3) above. As a result, the present disclosure further provides an effect of being able to provide a structure for preventing foreign matter from entering through the second opening in the canister vent solenoid valve.

[0032] The present disclosure further discloses the following configuration. (6) a tapered portion extending from the second opening portion through the second internal passage toward an axis of the inner cylindrical portion of the filter portion; The canister vent solenoid valve according to (1), (2), (3), (4), or (5). As a result, the present disclosure further has an effect of providing a structure for promoting drainage of water that has entered the filter portion in the canister vent solenoid valve.

[0033] The present disclosure further discloses the following configuration. (7) A dust filter is provided at the second opening. The canister vent solenoid valve according to (1), (2), (3), (4), (5), or (6). As a result, the present disclosure further provides an effect of being able to provide a structure for reducing the intrusion of foreign matter through the second opening in the canister vent solenoid valve.

[0034] The present disclosure further discloses the following configuration. (8) The dust filter is made of resin. The canister vent solenoid valve according to (7) above. As a result, the present disclosure further provides an effect of providing a structure for improving productivity in the canister vent solenoid valve.

[0035] In addition, in the present disclosure, any of the components of the embodiments may be modified or omitted within the scope of this disclosure. [Industrial Applicability]

[0036] The canister vent solenoid valve according to the present disclosure has a structure that prevents water from entering the valve portion, and is therefore suitable for use as a canister vent solenoid valve mounted in a vehicle, for example. [Explanation of symbols]

[0037] 1 canister vent solenoid valve, 10 valve portion (valve device), 100, 100' filter portion (filter device), 100a filter upper portion, 100b filter lower portion, 101 outer cylinder portion, 102 inner cylinder portion, 103 lid portion, 104 lower bottom portion, 110 first opening portion, 120, 120' second opening portion, 122 partition portion, 124 tapered portion, 130 labyrinth structure part, 132 first annular portion, 134 second annular portion, 136 connection portion, 140 filter material, 150 dustproof filter.

Claims

1. A valve portion that opens and closes a passage communicating with the outside air; a filter section provided between the outside air and the valve section in the passage; a first opening portion that communicates a first internal passage connected to the valve portion at an upper portion of the filter portion with outside air; a second opening formed in a lower bottom portion of the filter portion and communicating a second internal passage connected to the first internal passage with outside air; a labyrinth structure component disposed in the second internal passage between the first internal passage and the second opening; Equipped with the filter portion has a cylindrical shape including an outer cylinder portion and an inner cylinder portion disposed inside the outer cylinder portion, The labyrinth structure component has a first annular portion and a second annular portion, The inner cylindrical portion is disposed so that an outer periphery of the inner cylindrical portion is in contact with an inner periphery of the first annular portion, an inner diameter of the first annular portion is smaller than an inner diameter of the second annular portion; an inner diameter of the second annular portion is smaller than an outer diameter of the first annular portion; an outer diameter of the first annular portion is smaller than an outer diameter of the second annular portion; A canister vent solenoid valve configured such that the first annular portion and the second annular portion are combined together such that a gap is formed between the first annular portion and the second annular portion.

2. The labyrinth structure part includes: In a state where the filter unit is assembled, the first annular portion has an inclined shape extending from an upper portion to a lower portion of the second internal passage in a direction from the inner cylindrical portion to the outer cylindrical portion, the second annular portion is disposed closer to the lower bottom portion of the filter portion than the first annular portion, and has an inclined shape extending from the upper portion to the lower portion of the second internal passage in a direction from the outer tubular portion to the inner tubular portion.

2. The canister vent solenoid valve of claim 1.

3. The first internal passageway is The valve portion is configured to communicate with outside air via the first opening, an opening formed in an upper portion of the outer cylindrical portion, an opening formed in an upper portion of the inner cylindrical portion, and the inner cylindrical portion.

3. A canister vent solenoid valve according to claim 1 or 2.

4. The opening area of ​​the second opening is smaller than the opening area of ​​the first opening.

3. A canister vent solenoid valve according to claim 1 or 2.

5. a tapered portion extending from the second opening toward a central axis of the filter portion as the second internal passage advances upward; 3. A canister vent solenoid valve according to claim 1 or 2.

6. a tapered portion extending from the second opening toward a central axis of the filter portion as the second internal passage advances upward; 5. The canister vent solenoid valve of claim 4.

7. A dust filter is provided at the second opening.

3. A canister vent solenoid valve according to claim 1 or 2.

8. The dust filter is made of resin.

8. The canister vent solenoid valve of claim 7.

9. A valve portion that opens and closes a passage communicating with the outside air; a filter section provided between the outside air and the valve section in the passage; a first opening portion that communicates a first internal passage connected to the valve portion at an upper portion of the filter portion with outside air; a second opening formed in a lower bottom portion of the filter portion and communicating a second internal passage connected to the first internal passage with outside air; a labyrinth structure component disposed in the second internal passage between the first internal passage and the second opening; Equipped with the filter portion has a cylindrical shape including an outer cylinder portion and an inner cylinder portion disposed inside the outer cylinder portion, a canister vent solenoid valve having a tapered portion extending from the second opening toward a central axis of the filter portion as the second internal passage advances upward.

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