JP2019203396A - Purge control valve - Google Patents

Abstract

To provide a purge control valve which enables reduction of assembly work hours of a filter member.SOLUTION: A purge control valve 4 is a control valve installed at an evaporative fuel passage in which an evaporative fuel desorbed from a canister circulates toward an engine. The purge control valve 4 includes: a body housing 40 having a housing internal passage 401a in which the evaporative fuel circulates therein and incorporating an electromagnetic coil part 42 for driving a valve body 43; and an outflow member 6 connected to the body housing 40. In the outflow member 6, a cylindrical part 62 having a valve seat 63, an outflow tubular part 60 formed with an outflow passage 60a through which the evaporative fuel flowing out from the housing internal passage 401a circulates, and a filter part 7 which allows passage of the evaporative fuel and prevents passage of foreign objects are integrally molded.SELECTED DRAWING: Figure 4

Description

  The disclosure in this specification relates to a purge control valve provided in an evaporated fuel passage through which evaporated fuel flows toward an engine.

  Patent Document 1 describes an evaporated fuel purge device that purges evaporated fuel generated in a fuel tank to the intake side of an engine. This evaporative fuel purge device is provided with a filter member that is provided in a fuel flow path provided inside the main body and supplements foreign matter such as dust and dirt in the evaporative fuel.

JP 2014-111915 A

  In the filter member of Patent Document 1, one end of a ring portion provided in the filter member is fitted into an annular groove formed in a partition wall, and the tip portion on the other end side of the filter portion is a component in which a fuel outflow pipe is formed. It is fixed in the main body by abutting. In order to assemble the filter member into the evaporated fuel purge device, it is necessary to fit the tip of the ring portion into the annular groove of the partition wall and accurately perform the work of sandwiching the filter member between the part where the fuel outflow pipe is formed and the partition wall. is there.

  An object of the disclosure in this specification is to provide a purge control valve capable of reducing the number of assembling steps of a filter member.

  A plurality of aspects disclosed in this specification adopt different technical means to achieve each purpose. Further, the reference numerals in parentheses described in the claims and in this section are examples showing the correspondence with specific means described in the embodiments described later as one aspect, and limit the technical scope. is not.

  One of the disclosed purge control valves is a purge control valve (4) installed in an evaporated fuel passage through which evaporated fuel desorbed from the canister (16) flows toward the engine (22). A body housing (40) having an internal housing passage (401a) through which evaporated fuel flowing in from the side flows, and a built-in electromagnetic coil portion (42) for driving a valve body (43) for opening and closing the internal housing passage; And an outflow member (6) connected to the main body housing. The outflow member flows out of the tubular portion (62) having the valve seat (63) on which the valve body is seated and the passage in the housing. An outflow portion (60) in which an outflow passage (60a) through which the evaporated fuel flows is formed and a filter portion (7) that allows passage of the evaporated fuel and prevents passage of foreign matters are integrally formed.

  According to this purge control valve, at least a main body including an outflow member in which an evaporative fuel outflow passage, a cylindrical portion having a valve seat, and a filter portion are integrally formed, and the outflow member and the electromagnetic coil portion are built in. It has the structure connected with a housing. With this configuration, the purge control valve including the filter portion can be manufactured by coupling the outflow member to the main body housing. As described above, it is possible to provide a purge control valve that can reduce the number of assembling steps of the filter member.

It is the schematic which showed the evaporated fuel processing system which can mount the purge control valve of 1st Embodiment. It is the front view which showed the purge control valve of 1st Embodiment. It is the bottom view which showed the purge control valve of 1st Embodiment. It is sectional drawing which showed the IV-IV cut surface in FIG. It is the elements on larger scale which expanded the circle in FIG. It is the perspective view which showed the filter unit.

(First embodiment)
A first embodiment will be described with reference to FIGS. The evaporative fuel processing system shown in FIG. 1 supplies HC gas or the like in the fuel adsorbed by the canister 16 to the intake passage of the engine 22 and prevents the evaporative fuel from the fuel tank 14 from being released into the atmosphere. It is also a system to do. This evaporative fuel processing system includes a purge control valve 4 that can adjust the flow rate of the evaporative fuel supplied to the intake passage at a predetermined position in the evaporative fuel passage. The purge control valve 4 includes a main body housing 40 containing the electromagnetic coil portion 42, an inflow member 5 coupled to the main body housing 40, and an outflow member 6 coupled to the main body housing 40. Each of the main body housing 40, the inflow member 5, and the outflow member 6 is formed of a resin material.

  The evaporated fuel introduced into the intake system 1 of the engine 22 is mixed with combustion fuel supplied to the engine 22 from an injector or the like and burned in a cylinder of the engine 22. The intake system 1 of the engine 22 is configured such that one end side of the intake pipe 10 is connected to an intake manifold 20 of the engine 22 via a throttle valve 21, and a filter 23 is provided in the middle of the intake pipe 10. The evaporative fuel purge system 2 is formed by connecting a fuel tank 14 and a canister 16 to an intake manifold 20 via a pipe 15, a pipe 17, a pipe 19 and a pipe 18.

  The filter 23 is provided at the most upstream part of the intake pipe 10 and captures dust, dust, and the like in the intake air. The throttle valve 21 is an intake air amount adjustment valve that adjusts the amount of intake air flowing into the intake manifold 20 by adjusting the opening at the inlet of the intake manifold 20 in conjunction with the accelerator pedal. The intake air sequentially passes through the filter 23 and the throttle valve 21, flows into the intake manifold 20, is mixed with combustion fuel injected from an injector or the like so as to have a predetermined air-fuel ratio, and is combusted in the cylinder.

  The fuel tank 14 is a container for storing fuel such as gasoline. The fuel tank 14 is connected to the inflow portion 16 a of the canister 16 by a pipe 15. The canister 16 is a container in which an adsorbent such as activated carbon is enclosed. The canister 16 takes in evaporated fuel generated in the fuel tank 14 from the inflow portion 16a via the pipe 15 and temporarily adsorbs the adsorbent on the adsorbent. The canister 16 is provided with a suction portion 16b for sucking fresh fresh air. By providing the canister 16 with the suction portion 16 b, atmospheric pressure acts in the canister 16. The canister 16 can easily remove the evaporated fuel adsorbed on the adsorbent by the freshly sucked air.

  For example, a valve module is integrally provided in the suction portion 16b. The valve module has a built-in canister close valve that opens and closes a suction section for sucking in fresh fresh air, and an internal pump that can discharge gas to the atmosphere and suck air. ing. When the canister 16 includes the canister close valve, atmospheric pressure can be applied to the canister 16. The canister 16 can easily desorb, that is, purge, the evaporated fuel adsorbed on the adsorbent by the freshly sucked air.

  The canister 16 is provided with an outflow portion 16c through which the evaporated fuel separated from the adsorbent flows out. One end side of the pipe 17 is connected to the outflow portion 16c. The other end side of the pipe 17 is connected to the inflow portion of the purge control valve 4. Here, the passage in the pipe 17 is also referred to as a fuel inflow passage through which fuel flows into the purge control valve 4. The purge control valve 4 and the check valve device 3 communicate with each other by being connected by a pipe 19. The outflow side of the check valve device 3 is connected to one end side of the pipe 18. Here, the passage in the pipe 18 is also referred to as a fuel outflow passage through which the fuel flowing out from the purge control valve 4 passes. The other end side of the pipe 18 is connected to the inflow portion of the intake manifold 20.

  The purge control valve 4 is an opening / closing means for opening and closing the evaporated fuel passage, and can permit and block the supply of the evaporated fuel flowing out from the canister 16 to the engine 22. As shown in FIG. 4, the purge control valve 4 includes a valve body 43 and an electromagnetic coil part 42 including a coil part 420, a spring 424, and the like. The purge control valve 4 opens and closes the in-housing passage 401a by driving the valve body 43 in accordance with the balance between the electromagnetic force generated when the coil portion 420 is energized and the biasing force of the spring 424.

  The purge control valve 4 includes a main body housing 40 that forms a housing inner passage 401a. The in-housing passage 401a is a passage provided downstream of the chamber chamber 400a in the main body housing 40 and the main body inner throttle passage 402a. In the purge control valve 4, when the coil portion 420 is energized while the housing passage 401 a that normally forms an evaporative fuel passage is closed and the coil portion 420 is energized, the electromagnetic force overcomes the elastic force of the spring 424. The in-housing passage 401a is opened away from the valve seat 63. The control device energizes the coil unit 420 by controlling the ratio of the on time to the time of one cycle formed by the energization on time and the off time, that is, the duty ratio. The purge control valve 4 is also called a duty control valve. By this energization control, the flow rate of the evaporated fuel flowing through the in-housing passage 401a is adjusted.

  The check valve device 3 is an evaporative fuel passage extending from the canister 16 to the intake pipe 10 and is a valve for preventing a reverse flow installed between the purge control valve 4 and the intake manifold 20. The check valve device 3 allows the original flow of the evaporated fuel from the fuel inflow passage (passage in the pipe 19) to the fuel outflow passage (passage in the pipe 18) in the evaporative fuel passage. Prevents the backflow of evaporated fuel to the inflow passage. The check valve device 3 includes a valve body that operates to open the flow path with the original flow of the evaporated fuel and close the flow path with the reverse flow of the evaporated fuel.

  When the purge control valve 4 is opened by the control device while the vehicle is running, a difference between the negative pressure in the intake manifold 20 generated by the intake action of the piston and the atmospheric pressure applied to the canister 16 occurs. Due to this pressure difference, the vapor fuel adsorbed in the canister 16 flows through the fuel inflow passage, the purge control valve 4, the check valve device 3, and the fuel outflow passage, and is sucked into the intake manifold 20.

  The evaporated fuel sucked into the intake manifold 20 is mixed with the original combustion fuel supplied from the injector or the like to the engine 22 and burned in the cylinder of the engine 22. Further, in the cylinder of the engine 22, the air-fuel ratio, which is the mixing ratio of the combustion fuel and the intake air, is controlled so as to become a predetermined air-fuel ratio. The control device performs duty control on the opening time and the closing time of the purge control valve 4 to adjust the purge amount of the evaporated fuel so that the predetermined air-fuel ratio is maintained even if the evaporated fuel is purged.

  As shown in FIGS. 2 to 4, the purge control valve 4 includes an inflow member 5, an outflow member 6, and a main body housing 40 to which the inflow member 5 and the outflow member 6 are connected. Yes. The inflow member 5 is a member that allows the pipe 17 and the main body housing 40 to communicate with each other. The outflow member 6 is a member that allows the main body housing 40 and the pipe 19 to communicate with each other.

  The inflow member 5 includes an inflow tubular portion 50 into which evaporated fuel from the canister 16 side flows, and a flange portion 51 fixed to the main body housing 40 by welding or adhesion. The inflow tubular portion 50 is an inflow portion having an inflow passage 50a inside. The inflow tubular portion 50 is connected to a pipe 17 that forms an evaporative fuel passage in the evaporative fuel processing system, and communicates with the canister 16 via the pipe 17.

  The flange portion 51 is a portion in which the inflow tubular portion 50 is integrally provided on the annular wall portion located at the upstream end, and projects radially from the outer peripheral edge of the opening located at the downstream end. The flange portion 51 is a portion joined to the flange portion 400 b of the main body housing 40. The flange portion 51 is integrally joined in a state of being overlapped with the flange portion 400b.

  The main body housing 40 has a bottom portion on one end side, a downstream opening portion on the other end side opposite to the one end side, and a side opening with respect to the bottom portion at the downstream opening portion. It has an upstream opening that opens in a direction that intersects it. The main body housing 40 accommodates a valve body 43 for opening and closing the in-housing passage 401a and an electromagnetic coil portion 42 for driving the valve body 43. The electromagnetic coil portion 42 is integrally installed on the bottom portion of the main body housing 40.

  The downstream opening and the upstream opening are circular. A flange portion 401b that protrudes radially outward is provided on the entire circumference of the downstream opening. A flange portion 400b that protrudes radially outward is provided on the entire circumference of the upstream opening. The flange portion 400 b is a portion joined to the flange portion 51 of the inflow member 5.

  The main body housing 40 includes a chamber chamber forming portion 400 and an outflow side tubular portion 401 that extends in a direction intersecting the chamber chamber forming portion 400 and is connected to the outflow member 6. Yes. The chamber chamber forming portion 400 and the outflow side tubular portion 401 form an extending passage and an opening that opens in a direction orthogonal to each other. The chamber chamber forming portion 400 is a cylindrical portion in which a flange portion 400b that protrudes radially is formed on the outer peripheral edge of the opening located at the upstream end, and the chamber chamber 400a is formed downstream of the opening.

  The chamber chamber 400a communicates with an inflow passage 50a having a smaller passage cross-sectional area than the chamber chamber 400a at the upstream end, and communicates with a main body internal throttle passage 402a having a smaller passage cross-sectional area than the chamber chamber 400a at the downstream end. The passage cross-sectional area of the inflow passage 50a is a cross-sectional area when the inflow passage 50a is cut by a plane orthogonal to the central axis of the inflow passage 50a. The passage cross-sectional area of the chamber chamber 400a is a cross-sectional area when the chamber chamber 400a is cut by a plane orthogonal to the central axis of the passage formed by the chamber chamber 400a. The passage cross-sectional area of the main body inner throttle passage 402a is a cross-sectional area when the main body inner throttle passage 402a is cut by a plane orthogonal to the central axis of the main body inner throttle passage 402a. Therefore, in the fuel vapor passage, the passage cross-sectional area increases abruptly when it advances from the inflow passage 50a to the chamber chamber 400a. The chamber chamber 400 a provides a chamber volume that has an effect of reducing pulsation generated in the purge control valve 4.

  The outflow side tubular portion 401 is a tubular portion in which a flange portion 401b that protrudes radially is formed on the outer peripheral edge of the opening located at the downstream end, and a columnar space is formed upstream of the opening. The flange portion 401 b is a portion joined to the flange portion 61 of the outflow member 6. The main body housing 40 includes a communication wall portion 402 in which the chamber chamber forming portion 400 and the outflow side tubular portion 401 are connected. The connecting wall portion 402 is a wall portion that connects the intersecting chamber chamber forming portion 400 and the outflow side tubular portion 401 in the main body housing 40. The main body housing 40 has a main body internal throttle passage 402 a formed between the communication wall portion 402 and the electromagnetic coil portion 42. Therefore, the inflow passage 50a and the main body internal throttle passage 402a are passages having a small passage cross-sectional area on the upstream side and the downstream side with respect to the chamber chamber 400a.

  The purge control valve 4 includes a valve body 43, a movable core 422, an electromagnetic coil unit 42, and the like. The electromagnetic coil part 42 includes a coil part 420, a bobbin 421, and the like, and is covered with a covering part 404 formed of a resin material. The covering portion 404 is formed integrally with the main body housing 40. In other words, it can be said that the electromagnetic coil portion 42 is resin-molded by the covering portion 404.

  The purge control valve 4 is fixed to a member on the vehicle side by, for example, a bolt that is screwed into a nut embedded in the main body housing 40. The movable core 422 is made of a magnetic material, such as a magnetic material. The movable core 422 that is a cylindrical body surrounds the shaft member 425 and the spring 424 that are inserted from the open end. The valve body 43 is made of an elastically deformable material such as rubber. The valve body 43 is attached to the movable core 422 so as to be integrated with the movable core 422 so that the base portion and the valve portion sandwich the head of the movable core 422 from both sides.

  The fixed core 423 slidably supports the movable core 422 that moves in the axial direction against the urging force of the spring 424 by electromagnetic force. The spring 424 has a cylindrical portion of the movable core 422 in a state where one end in the axial direction is in contact with the shaft member 425 fixed to the fixed core 423 and the other end in the axial direction is in contact with the head of the movable core 422. It is provided inside. Therefore, the spring 424 provides an urging force for moving the movable core 422 to the valve seat 63 side. The fixed core 423 fixes the shaft member 425 and is assembled to a bobbin 421 to be externally fitted. The fixed core 423, the shaft member 425, the movable core 422, and the valve body 43 are installed such that the axes are coaxial. The shaft member 425 is made of, for example, polybutylene terephthalate reinforced with polybutylene terephthalate or glass fiber. The fixed core 423 and the movable core 422 are made of a material that allows magnetism to pass through. The fixed core 423 is made of, for example, a cold forging carbon steel wire. The movable core 422 includes a metal component in which a steel plate is coated with a fluorine resin, and a rubber component made of low-temperature fluororubber that can maintain rubber elasticity even in a low-temperature region.

  As shown in FIGS. 2 to 4, the main body housing 40 includes a connector 403 that extends outward at the bottom on one end side where the electromagnetic coil portion 42 is installed. The connector 403 includes a terminal 403 a for energizing the coil unit 420. The connector 403 is a resin molding part that supports a terminal 403 a that penetrates the bottom from the inside of the main body housing 40 and protrudes to the outside. The terminal 403 a is an energization terminal that is electrically connected to the coil unit 420. The connector 403 is connected to a power supply side connector for supplying power from the power supply unit and the current control device. When the connector 403 and the power supply side connector are connected and the terminal 403a is electrically connected to a current control device or the like, the purge control valve 4 can control the current supplied to the coil section 420.

  The outflow member 6 includes a flange portion 61 that is fixed to the main body housing 40 by welding or adhesion, and an outflow tubular portion 60 that protrudes from the flange portion 61 in a direction orthogonal to the flange portion 61. The outflow tubular portion 60 is an outflow portion having an outflow passage 60a therein. The outflow tubular portion 60 forms an outflow passage 60a through which the evaporated fuel flowing out from the in-housing passage 401a flows. The outflow tubular portion 60 is connected to a pipe 19 that forms an evaporated fuel passage in the evaporated fuel processing system, and communicates with the check valve device 3 through the pipe 19.

  The outflow member 6 includes a cylindrical portion 62 that protrudes to the opposite side of the outflow tubular portion 60 in the flange portion 61. The cylindrical part 62 has a valve seat 63 with which the valve element 43 contacts on the tip side. The cylindrical portion 62 has a shape that protrudes to the inside of the main body housing 40 through the opening of the flange portion 401b, and an internal passage through which evaporated fuel flowing out from the in-housing passage 401a flows when the valve body 43 is in the valve open state. 62a inside.

  The flange portion 61 is a portion that protrudes radially outward in the radial direction on the entire circumference of the connecting portion where the tubular portion 62 and the outflow tubular portion 60 are connected. The flange portion 61 is a portion joined to the flange portion 401 b of the main body housing 40. The flange portion 61 is integrally joined in a state where the flange portion 61 is overlapped with the flange portion 401b.

  As shown in FIGS. 4 and 6, the outflow member 6 includes a tubular portion 62, an outflow tubular portion 60 in which an outflow passage 60 a is formed, and a filter portion that allows passage of evaporated fuel and prevents passage of foreign matter. 7. The tubular portion 62, the outflow tubular portion 60, and the filter portion 7 are integrally formed in the outflow member 6. The integral molding described in this specification means that a product is integrally molded simultaneously with the joining of members without using secondary bonding or mechanical joining. The filter portion 7 is formed integrally with the outflow member 6 at the same time as the joining with the flange portion 61 without using secondary bonding or mechanical joining.

  The filter portion 7 includes a frame body that is integrally formed with the flange portion 61 so as to surround the cylindrical portion 62, and a mesh portion 73 that is integrally formed with the frame body. The mesh part 73 is a part that allows passage of evaporated fuel and prevents passage of foreign matter in the fuel. The mesh portion 73 can be formed of, for example, nylon resin. In the filter part 7, the frame and the mesh part 73 may be integrally formed of the same material or may be integrally formed of different materials. The frame body is a squirrel-cage cage formed by integrally forming a distal end side annular portion 70, a base side annular portion 71 provided so as to face the distal end side annular portion 70, and a plurality of connecting portions 72. It is.

  The distal end side annular portion 70 is provided at a position spaced from the flange portion 61 so as to surround the valve seat 63 located on the distal end side of the cylindrical portion 62. The base side annular portion 71 is formed integrally with the flange portion 61. The some connection part 72 is located in a line with the space | interval in the circumferential direction. Each connecting portion 72 is integrally formed with the tip-side annular portion 70 and the base-side annular portion 71 so as to bridge the tip-side annular portion 70 and the base-side annular portion 71 that are spaced apart in the axial direction of the filter portion 7. ing. The connecting portion 72 is a rod-like portion extending between the distal end side annular portion 70 and the base side annular portion 71. The mesh portion 73 is integrally formed with the distal end side annular portion 70 and the proximal side annular portion 71 so as to fill a space between the proximal side annular portion 71 and the distal end side annular portion 70. The mesh portion 73 is integrally formed with both the connecting portions 72 arranged in the circumferential direction so as to fill between the connecting portions 72 adjacent to each other in the circumferential direction.

  As shown in FIGS. 4 and 5, in the state where the outflow member 6 is connected to the main body housing 40, the front end portion 70 a of the front end side annular portion 70 has the electromagnetic coil portion 42 installed on the bottom side of the main body housing 40. It is in contact with the covering portion 404 to be covered. The distal end portion 70a may be configured to be provided on the entire circumference of the distal end side annular portion 70 or may be configured to be partially provided in a predetermined range in the circumferential direction. The distal end portion 70 a protrudes in the axial direction at the outer peripheral edge portion of the distal end side annular portion 70. The distal end portion 70a may be provided on the entire circumference of the outer peripheral edge portion of the distal end side annular portion 70 or may be provided partially in a predetermined range in the circumferential direction.

  The covering portion 404 is made of an insulating material, and blocks the evaporated fuel from the electromagnetic coil portion 42. The cover 404 is provided with a groove 404 a coaxial with the valve body 43. The groove 404a is provided so as to have a position and a shape in which the distal end portion 70a of the distal end side annular portion 70 can be fitted.

  The covering portion 404 is preferably formed of a material having a lower hardness than the distal end portion 70 a of the distal end side annular portion 70. According to this, when the coating | coated part 404 and the front-end | tip part 70a contact, the direction of the coating | coated part 404 becomes easier to deform | transform larger. Moreover, it is preferable that the front-end | tip part 70a of the front end side cyclic | annular part 70 is formed with the material whose hardness is smaller than the coating | coated part 404. FIG. According to this, when the coating | coated part 404 and the front-end | tip part 70a contact, the direction of the front-end | tip part 70a becomes easier to deform | transform larger. The hardness of the tip portion 70a and the covering portion 404 can be measured, for example, according to JIS Z 2244 showing the Vickers hardness test method.

  The connecting portion 72 has a cross section that tapers away from the cylindrical portion 62, in other words, as it goes in the radially outward direction. According to this shape, since the resin material easily flows from the connecting portion 72 to the mesh portion 73, the distal end side annular portion 70, and the base side annular portion 71 during integral molding, it contributes to improving the dimensional quality and shape quality of the filter portion 7. To do.

  Next, the effect which the purge control valve 4 of 1st Embodiment brings is demonstrated. The purge control valve 4 is a control valve installed in the evaporated fuel passage through which the evaporated fuel desorbed from the canister 16 flows toward the engine 22. The purge control valve 4 has an in-housing passage 401a through which evaporated fuel flowing from the canister 16 side flows, and a main body housing 40 having a built-in electromagnetic coil portion 42 that drives a valve body 43 that opens and closes the in-housing passage 401a. Is provided. Further, the purge control valve 4 includes an outflow member 6 connected to the main body housing 40. The outflow member 6 includes a cylindrical portion 62 having a valve seat 63 on which the valve body 43 is seated, an outflow portion in which an outflow passage 60a through which the evaporated fuel flowing out from the in-housing passage 401a circulates, A filter portion 7 that allows passage and prevents passage of foreign matters is integrally formed.

  The purge control valve 4 includes the outflow member 6 in which at least the tubular portion 62 having the outflow passage 60a and the valve seat 63 and the filter portion 7 are integrally formed. The outflow member 6 and the electromagnetic coil portion 42 are provided. And a main body housing 40 having a built-in structure. The purge control valve 4 including the filter unit 7 can be manufactured by coupling the outflow member 6 having this configuration to the main body housing 40. Based on the above, it is possible to provide the purge control valve 4 in which the number of steps for assembling the filter can be suppressed.

  According to the purge control valve 4, the filter unit 7 is configured to fix only one side portion in the axial direction to the main body housing 40, so that the filter unit 7 is related to the counterpart part to which the filter unit 7 is fixed and the filter unit 7. There is no need to require dimensional accuracy at both axial ends. Therefore, the manufacturing cost can be reduced as compared with the above-described conventional technology, and the purge control valve 4 with high productivity can be provided. Moreover, according to the structure which is the single component which integrally formed the outflow part, the valve seat 63, and the filter part 7, since it is not necessary to manage each of the filter part and the outflow member as a part, the part management man-hour is reduced. A purge control valve 4 that can be suppressed can be provided.

  The filter portion 7 is formed integrally with a flange portion 61 coupled to the main body housing 40 in the outflow member 6 so as to surround the cylindrical portion 62, and a mesh integrally formed with the frame body. Part 73. According to this configuration, the filter portion 7 having the mesh portion 73 so as to surround the cylindrical portion 62 can be integrally formed with the outflow member 6. By coupling the outflow member 6 having this configuration to the main body housing 40, the purge control valve 4 in which the evaporated fuel flowing from the surroundings into the valve seat 63 in the open state passes through the mesh portion 73 can be manufactured.

  The frame body has a tip-side annular portion 70 that is provided apart from the flange portion 61 so as to surround the valve seat 63 positioned on the tip side of the cylindrical portion 62. The distal end portion 70a of the distal end side annular portion 70 is in contact with a covering portion 404 that covers the electromagnetic coil portion 42 so as to have an insulating property and block evaporated fuel. According to this configuration, by connecting the outflow member 6 to the main body housing 40, the distal end portion 70 a of the distal end side annular portion 70 comes into contact with the covering portion 404, so that the filter portion 7 can be positioned with respect to the main body housing 40. The filter unit 7 can be installed in a stable state.

  The cover 404 is provided with a groove 404 a coaxial with the valve body 43. The distal end portion 70a of the distal end side annular portion 70 is fitted in the groove portion 404a. According to this configuration, by connecting the outflow member 6 to the main body housing 40, the front end portion 70 a of the front end side annular portion 70 is fitted into the groove portion 404 a, so that the filter portion 7 can be positioned with respect to the main body housing 40. The filter unit 7 can be installed in a stable state. Furthermore, according to this configuration, the purge control valve 4 having a function of aligning the valve seat 63 with respect to the valve body 43 can be provided.

  The covering portion 404 is formed of a material having a lower hardness than the distal end portion 70 a of the distal end side annular portion 70. According to this configuration, since the tip portion 70a is grounded so as to bite into the surface of the covering portion 404 and the groove portion 404a, the purge control valve 4 with improved adhesion performance between the tip-side annular portion 70 and the covering portion 404 can be provided.

  The distal end portion 70 a of the distal end side annular portion 70 is formed of a material having a hardness lower than that of the covering portion 404. According to this configuration, the distal end portion 70a is deformed so as to be crushed against the surface of the covering portion 404 and the groove portion 404a and is grounded, so that the purge control that improves the close contact performance between the distal end side annular portion 70 and the covering portion 404. A valve 4 can be provided.

  The frame body bridges the distal end side annular portion 70 and the base side annular portion 71 with a distal end side annular portion 70, a base portion side annular portion 71 integrally formed with the flange portion 61, and a circumferential interval. And a plurality of connecting portions 72 integrally formed. The mesh portion 73 is connected between the base portion side annular portion 71 and the tip end side annular portion 70 so as to fill a space between the contact portion 72 and the contact portion 72 adjacent in the circumferential direction. The side annular portion 71 is integrally formed.

  According to this configuration, in the filter unit 7, the plurality of connecting portions 72 and the mesh portion 73 are integrally formed between the distal end side annular portion 70 and the base portion side annular portion 71. For this reason, when a compressive force is applied to the filter portion 7 in the axial direction, the filter portion 7 can be deformed between the distal end side annular portion 70 and the base side annular portion 71. Therefore, even when a compressive force is applied to the filter portion 7 in the axial direction at the time of manufacture, the outflow member 6 is properly connected to the main body housing 40 while ensuring the contact state between the distal end side annular portion 70 and the covering portion 404. A possible purge control valve 4 can be provided.

(Other embodiments)
The disclosure of this specification is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations by those skilled in the art based thereon. For example, the disclosure is not limited to the combination of components and elements shown in the embodiments, and various modifications can be made. The disclosure can be implemented in various combinations. The disclosure may have additional parts that can be added to the embodiments. The disclosure includes those in which the components and elements of the embodiment are omitted. The disclosure encompasses parts, element replacements, or combinations between one embodiment and another. The technical scope disclosed is not limited to the description of the embodiments. The technical scope disclosed is indicated by the description of the claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the claims.

  The purge control valve that can achieve the object disclosed in the specification is not a flow rate adjusting device that is applied only to the evaporated fuel processing system disclosed in the above-described embodiment. For example, the purge control valve can be applied to a system in which the evaporated fuel that has passed through the purge control valve can be introduced into a passage upstream of the supercharger, and purge at the time of supercharging can be performed.

  The purge control valve that can achieve the object disclosed in the specification is not only a device in which the main body housing 40 and the inflow member 5 which are separate parts are integrally coupled, but also the main body housing 40 and the inflow member 5. Includes a device composed of a single component.

  The purge control valve that can achieve the object disclosed in the specification is not limited to the outflow member 6 having the configuration shown in the above-described embodiment. For example, the outflow member 6 may be configured to include the inflow tubular portion 50.

DESCRIPTION OF SYMBOLS 4 ... Purge control valve, 6 ... Outflow member, 7 ... Filter part, 16 ... Canister 22 ... Engine, 40 ... Main body housing, 42 ... Electromagnetic coil part 43 ... Valve body, 60 ... Outflow tubular part (outflow part), 60a ... Outflow passageway 61 ... Flange part 62 ... Cylindrical part 63 ... Valve seat 70 ... Tip side annular part (frame body), 70a ... Tip part 71 ... Base side annular part (frame body), 72 ... Connecting part ( Frame body), 73 ... mesh part 401a ... passage in housing, 404 ... covering part, 404a ... groove part

Claims (7)

A purge control valve (4) installed in an evaporated fuel passage through which evaporated fuel desorbed from the canister (16) flows toward the engine (22);
A main body housing (inside housing housing passage (401a) through which evaporated fuel flowing in from the canister side circulates and incorporating an electromagnetic coil portion (42) for driving a valve body (43) that opens and closes the inside housing passage ( 40)
An outflow member (6) connected to the body housing;
With
The outflow member is formed with a tubular portion (62) having a valve seat (63) on which the valve body is seated, and an outflow passage (60a) through which evaporated fuel flowing out from the passage in the housing flows. A purge control valve in which a part (60) and a filter part (7) which allows passage of evaporated fuel and prevents passage of foreign substances are integrally formed.   The filter portion is formed integrally with a flange portion (61) coupled to the main body housing in the outflow member, and is formed so as to surround the cylindrical portion (70, 71, 72), The purge control valve according to claim 1, further comprising a mesh portion (73) integrally formed with the frame body. The frame body has a distal end side annular portion (70) provided so as to be separated from the flange portion so as to surround the valve seat located on the distal end side of the cylindrical portion,
The purge control according to claim 2, wherein the tip end portion (70a) of the tip end side annular portion is in contact with a covering portion (404) that covers the electromagnetic coil portion so as to have an insulating property and block evaporated fuel. valve.   The purge control valve according to claim 3, wherein the covering portion is provided with a groove portion (404a) coaxially with the valve body, and the tip portion of the tip-side annular portion is fitted in the groove portion. .   The purge control valve according to claim 3 or 4, wherein the covering portion is formed of a material having a hardness smaller than that of the tip portion of the tip side annular portion.   The purge control valve according to claim 3 or 4, wherein the tip portion of the tip-side annular portion is formed of a material having a hardness lower than that of the covering portion. The frame body is integrally formed so as to bridge the base-side annular portion (71) integrally formed with the flange portion, and the distal-end-side annular portion and the base-side annular portion arranged at intervals in the circumferential direction. A plurality of communication parts (72) that are connected,
The mesh portion is arranged between the base portion side annular portion and the tip end side annular portion so as to fill a space between the connecting portion and the connecting portion adjacent in the circumferential direction. The purge control valve according to any one of claims 3 to 6, wherein the purge control valve is integrally formed with the base-side annular portion.

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