JP3994438B2 - Fluid ejecting apparatus and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluid injection device that injects fuel into, for example, an intake system, a combustion chamber, or an exhaust system of an internal combustion engine (hereinafter, the internal combustion engine is referred to as an “engine”), and a manufacturing method thereof.
[0002]
[Prior art]
The engine is equipped with a fluid injection device for injecting fuel. As a fluid injection device, for example, there is a device that injects fuel into an intake system or a combustion chamber in order to operate an engine, or a device that injects fuel into an exhaust system in order to purify exhaust gas.
For example, in the case of a fluid injection device for exhaust purification that injects fuel into an exhaust system of an engine, fuel as a reducing agent is injected into exhaust flowing through an exhaust pipe. Thereby, for example, NOx contained in the exhaust gas is reduced by the catalyst and rendered harmless (see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 06-026328
[0004]
Such a fluid injection device for purifying exhaust or for injecting fuel into an engine has a housing 101 made of metal and a resin cover 102 made of resin as shown in FIG. A housing 101 made of metal is covered with a resin cover 102 made of resin.
[0005]
[Problems to be solved by the invention]
However, since the housing 101 and the resin cover 102 are made of different materials, the housing 101 and the resin cover 102 are not completely in close contact with each other, and a slight gap is formed between the housing 101 and the resin cover 102. . For example, in the case of the exhaust gas purification apparatus 100 for exhaust purification, the electrical connector 103 side of the fluid ejection apparatus 100 is installed to be exposed to the outside of the head cover 110. On the other hand, the boundary between the housing 101 and the resin cover 102 is located in a cam chamber 112 formed inside the head cover 110, that is, between the engine head 111. Therefore, the engine oil scattered in the cam chamber 112 enters a gap formed between the housing 101 and the resin cover 102. The invading engine oil flows along the boundary between the housing 101 and the resin cover 102 to the electrical connector 103 and the fuel connector 105 exposed to the outside of the head cover 110. As a result, engine oil may leak from the cam chamber 112 to the outside of the head cover 110.
In addition, since the electrical connector 103 and the fuel connector 105 are exposed to the outside of the head cover 110, the fluid such as water entering from the electrical connector 103 is camped along the boundary between the housing 101 and the resin cover 102. There is a risk of flowing into the chamber 112.
[0006]
Accordingly, an object of the present invention is to provide a fluid ejecting apparatus that seals between a housing made of metal and a resin cover made of resin and prevents entry of fluid into a boundary portion between the housing and the resin cover. .
Another object of the present invention is to provide a method of manufacturing a fluid ejecting apparatus having high sealing performance between a metal housing and a resin resin cover without increasing the number of steps.
[0007]
[Means for Solving the Problems]
  According to the fluid ejecting apparatus of the first aspect of the present invention, the filling member is filled in the boundary portion between the housing and the resin cover. The filling member is in close contact with the housing and the resin cover, and seals a gap formed between the housing and the resin cover. Accordingly, it is possible to prevent fluid from entering the boundary portion between the housing and the resin cover, which is the boundary portion between the metal and the resin.
According to the fluid ejecting apparatus of the first aspect of the present invention, the container member is further provided. A container member forms the filling part with which a filling member is filled between housings. For example, when a resin is used as the filling member, the filling member comes into close contact with the housing by filling the filling portion with a fluid resin and then curing the resin. By providing the container member, it is possible to prevent the fluid filling member from flowing out and to fill the predetermined filling portion with the filling member.
[0009]
  Claims of the invention2According to the fluid ejecting apparatus described, the container member has a melting point made of resin rather than the resin cover. Therefore, when a resin cover is molded using the container member as an insert, the container member melts. Thereby, the molten container member and the resin cover are welded when the resin cover is molded. As a result, the container member and the resin cover are in close contact with each other, and the path communicating with the boundary between the housing and the resin cover is closed. Therefore, not only between the filling member and the housing, but also in other portions, the path through which the fluid enters can be blocked.
[0010]
  Claims of the invention3According to the described fluid ejection device, the container member is formed in a double ring shape having an inner ring and an outer ring. Therefore, the filling member can be filled in the predetermined filling portion.
  Claims of the invention4According to the fluid ejecting apparatus described above, the end of the outer ring on the housing side is located closer to the housing than the inner ring. As the ends of the outer ring and the inner ring are displaced in the axial direction, a large space is formed on the inner peripheral side of the outer ring. Therefore, the filling member can be easily filled.
[0011]
  Claims of the invention5According to the described fluid ejecting apparatus, the inner ring and the outer ring have protrusions protruding in the radial direction. The protrusion is melted by contact with the first resin during molding of the resin cover. Therefore, the container member and the resin cover can be easily welded.
[0012]
  Claims of the invention6According to the described fluid ejecting apparatus, the protruding portion protrudes radially inward from the inner ring and protrudes radially outward from the outer ring. Therefore, the container member and the resin cover are welded on the inner peripheral side and the outer peripheral side. Thereby, different paths communicating with the boundary between the housing and the resin cover are respectively closed. Therefore, the intrusion of fluid can be prevented.
  Claims of the invention7According to the described fluid ejecting apparatus, the housing has the accommodating portion. The outer peripheral wall of the housing portion comes into contact with the outer wall of the outer ring of the container member. Thereby, positioning of the container member with respect to a housing can be made easy. Moreover, when the outer peripheral wall of the accommodating portion and the outer wall of the outer ring of the container member come into contact with each other, leakage of the filling member from the outer peripheral portion of the outer ring can be prevented.
[0013]
  Claims of the invention8According to the method for manufacturing a fluid ejecting apparatus described above, a container cover made of a resin having a high melting point is formed by inserting a container member made of a resin having a low melting point. Thereby, at the time of molding of the resin cover, the resin forming the container member is melted, and the container member and the resin cover are welded. Further, since the resin cover and the container member are welded simultaneously with the molding of the resin cover, the number of processes is not increased. Therefore, the container member and the resin cover can be securely adhered to each other, and the sealing performance can be improved.
  Claims of the invention9According to the manufacturing method of the fluid ejecting apparatus described, the container member has the protruding portion that melts when the resin cover is molded. By melting the protrusion, the container member and the resin cover can be reliably welded.
[0014]
  Claims of the invention10According to the manufacturing method of the fluid ejecting apparatus described above, the protruding portion is formed substantially perpendicular to the filling direction of the resin when the resin cover is molded. Therefore, the protrusion is easily melted by the inflow of the resin when the resin cover is molded. Thereby, a container member and a resin cover can weld reliably and can improve a sealing performance.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example showing an embodiment of the present invention will be described with reference to the drawings.
In this embodiment, the fluid injection device of the present invention is applied to a reducing agent addition device used in an exhaust purification system of a diesel engine. As shown in FIG. 2, the exhaust purification system 1 mainly includes a fluid injection device 10, a NOx catalyst 2, and a fuel supply device 3. The fluid injection device 10 according to the present embodiment injects fuel as a reducing agent into the exhaust from the four-cylinder diesel engine 5.
[0016]
The fluid injection device 10 is a fuel injection device that is mounted on the exhaust pipe 6 constituting the exhaust system of the diesel engine 5 and injects fuel into the exhaust gas flowing through the exhaust pipe 6. The fluid ejection device 10 is installed on the inlet side of the NOx catalyst 2 in the exhaust pipe 6. In the case of a diesel engine including a supercharger (not shown), the fluid ejection device 10 may be installed on either the inlet side or the outlet side of the supercharger installed in the middle of the exhaust pipe 6.
The exhaust system includes the exhaust pipe 6 and the exhaust manifold 61 that branches from the exhaust pipe 6 to each cylinder 51 of the diesel engine 5. In the exhaust pipe 6, the fluid ejection device 10 and the NOx catalyst 2 are sequentially installed in the direction of the exhaust flow.
[0017]
The fluid injection device 10 intermittently injects fuel according to a command from the ECU 7. Various types of information such as the intake air flow rate, the intake pressure, the rotational speed of the diesel engine 5 and the accelerator opening are input to the ECU 7 from various sensors installed in the diesel engine 5. The ECU 7 controls the amount of fuel injected into each cylinder 51 of the diesel engine 5 from the input information, and controls the fluid injection device 10 that injects fuel into the exhaust. The ECU 7 calculates the NOx emission amount that correlates with the rotational speed of the diesel engine 5, the accelerator opening, and the like. Based on the calculated NOx emission amount, the ECU 7 determines the injection amount and injection timing of the fuel injected from the fluid injection device 10. Set. The ECU 7 controls the fluid injection device 10 based on the set fuel injection amount and injection timing.
For the NOx catalyst 2, for example, a catalyst in which a noble metal-based active component such as Pt or Pd is supported on a carrier such as ceramic or metal oxide is used. The NOx catalyst 2 is formed into, for example, a monolith type or a pellet type.
[0018]
The fuel supply device 3 includes a fuel tank and a feed pump (not shown) and a feed pipe 8. The fuel supply device 3 supplies the fuel stored in the fuel tank to the fluid injection device 10. The fuel stored in the fuel tank is supplied to the fluid ejecting apparatus 10 via the feed pipe 8 by the feed pump. The fuel stored in the fuel tank is supplied as fuel to the diesel engine 5 and also supplied to the fluid injection device 10 as a hydrocarbon-based reducing agent.
[0019]
As shown in FIG. 1, the fluid ejecting apparatus 10 is installed through an engine head 62 that forms the exhaust pipe 6 and a head cover 64 that forms a cam chamber 63 between the engine head 62 and the engine head 62. The fluid ejecting apparatus 10 includes an on-off valve 20, a driving unit 30, a holding / mounting unit 40, and a nozzle unit 70.
[0020]
The on-off valve 20 includes a valve member 21 and a valve body 22, and intermittently injects fuel from the nozzle unit 70. A contact portion is formed on the outer wall of the valve member 21, and the contact portion can contact a valve seat portion formed on the inner wall of the valve body 22. The fuel flow is released when the contact portion is separated from the valve seat portion, and the fuel flow is blocked when the contact portion is seated on the valve seat portion.
[0021]
The drive means 30 includes a coil 31, a fixed core 32, a movable core 33, a stator 34, a spring 35, and the like, and reciprocates the valve member 21 in the axial direction. The coil 31 is wound around a spool 36 and installed between the fixed core 32 and the stator 34. The coil 31 generates a magnetic field when energized. A wiring part 37 is connected to the coil 31, and an end of the wiring part 37 on the side opposite to the coil is connected to the terminal 12 of the electrical connector 11. The coil 31 is electrically connected to the ECU 7 via the wiring portion 37, and electric power is supplied from the ECU 7.
[0022]
The fixed core 32 and the stator 34 are made of a magnetic material. A movable core 33 is installed at the end of the fixed core 32 on the nozzle part 70 side, and the valve member 21 is connected to the movable core 33 by, for example, welding. The integral movable core 33 and the valve member 21 are accommodated on the inner peripheral side of the pipe member 13 so as to be movable in the axial direction. The pipe member 13 has a magnetic part 132 and a magnetic part 133 with a nonmagnetic part 131 interposed therebetween, and a fixed core 32 is press-fitted on the inner peripheral side. The fixed core 32 is formed in a cylindrical shape, and the adjusting pipe 14 is press-fitted into the inner peripheral side of the fixed core 32. The adjusting pipe 14 is in contact with the spring 35. The end of the spring 35 on the side opposite to the adjusting pipe is in contact with the movable core 33. The spring 35 biases the fixed core 32 and the valve member 21 in the direction in which the contact portion is seated on the valve seat portion. The biasing force of the spring 35 is adjusted by adjusting the press-fitting amount of the adjusting pipe 14 to the fixed core 32.
[0023]
The fuel fed from the fuel supply device 3 flows into the fluid injection device 10 from the fuel connector 15. The fuel flowing in from the fuel connector 15 is supplied to the nozzle unit 70 via the inside of the pipe member 13, the inside of the adjusting pipe 14, the inside of the fixed core 32, the inside of the movable core 33, and the inside of the valve member 21. . On the outer peripheral side of the coil 31, the stator 34, and the pipe member 13, a mold resin 16 that covers the coil 31, the stator 34, the pipe member 13, and the like is formed. The on-off valve 20 and the driving means 30 covered with the mold resin 16 constitute an integral operating part.
[0024]
When electric power is supplied from the ECU 7 to the coil 31, a magnetic field is generated in the coil 31, and the magnetic part 133, the stator 34, the magnetic part 132, the movable core 33, and the fixed core 32 installed around the coil 31 are supplied to the coil 31. A magnetic circuit is formed. Thereby, a magnetic attractive force is generated between the fixed core 32 and the movable core 33, and the movable core 33 is attracted toward the fixed core 32 against the urging force of the spring 35. Therefore, the valve member 21 moves upward in FIG. 1, and the contact portion is separated from the valve seat portion. When the movable core 33 contacts the fixed core 32, the upward movement of the valve member 21 in FIG. 1 is limited. When the supply of power to the coil 31 is stopped, the magnetic attractive force between the fixed core 32 and the movable core 33 disappears, and the urging force of the spring 35 causes the valve member 21 integrated with the movable core 33 to be in FIG. Move down. Thereby, the contact portion is seated on the valve seat portion, and the fuel flow is blocked.
[0025]
The holding mounting part 40 includes a housing and a resin cover 41. The housing has a first housing 80, a second housing 42, and a third housing 43 that are configured separately. Each housing is formed in a cylindrical shape, and an operating portion including an on-off valve 20 and a driving means 30 is accommodated therein. The first housing 80 and the second housing 42 and the second housing 42 and the third housing 43 are connected by, for example, screwing or welding. The first housing 80 is formed with an introduction portion 80a into which fuel is introduced. The introduction unit 80 a is connected to the feed pipe 8, and fuel is supplied from the fuel supply device 3 via the feed pipe 8. The first housing 80 has a double ring portion 81 in the middle of the axial direction. A resin cover 41 is formed adjacent to the second annular housing 81 on the side opposite to the second housing. The resin cover 41 is held by the head cover 64 of the diesel engine 5. An oil seal 65 is provided between the resin cover 41 and the head cover 64 for sealing between the cam chamber 63 and the outside of the head cover 64.
[0026]
The third housing 43 is held by the engine head 62 of the diesel engine 5. A nozzle part 70 is connected to the end of the third housing 43 opposite to the second housing 42. The nozzle unit 70 has a nozzle body 71. The nozzle body 71 is fixed to the third housing 43 by screwing with a retaining nut 72.
[0027]
The nozzle body 71 is formed to extend in the central axis direction of the exhaust pipe 6. The nozzle body 71 is formed with an injection hole 73 and a communication passage 74 that communicates the injection hole 73 with the fuel outlet side of the on-off valve 20. The nozzle hole 73 is formed toward the downstream side of the exhaust flow. The fuel that has passed between the valve seat portion formed in the valve body 22 of the on-off valve 20 and the contact portion formed in the valve member 21 passes through the communication passage 74 and is discharged from the injection hole 73 to the exhaust pipe 6. Is injected into the exhaust. A nozzle cover 75 is attached to the outside of the nozzle body 71. The nozzle cover 75 prevents incombustible components contained in the exhaust from adhering to the outer wall of the nozzle body 71 and the vicinity of the injection hole 73.
[0028]
Next, a boundary portion between the first housing 80 and the resin cover 41 will be described. A double ring part 81 is formed in the first housing 80. The first housing 80 has an inner cylinder part 82 and an outer cylinder part 83 in the double ring part 81, and an operating part is accommodated on the inner peripheral side of the inner cylinder part 82. The inner cylindrical portion 82 and the outer cylindrical portion 83 are recessed toward the second housing 42, and the outer wall of the inner cylindrical portion 82 and the inner wall of the outer cylindrical portion 83 are connected by an inner bottom surface 84. A concave accommodating portion 85 is formed by the outer wall of the inner cylindrical portion 82, the inner wall of the outer cylindrical portion 83, and the inner bottom surface 84. A container member 90 is accommodated in the accommodating portion 85.
[0029]
The container member 90 is formed of a resin having a softening point and a melting point lower than that of the resin forming the resin cover 41. For example, the resin forming the resin cover 41 is made of 6,6-nylon, and the resin forming the container member 90 is made of 6-nylon. The container member 90 is formed in a double annular shape having an inner ring 91 and an outer ring 92. As shown in FIG. 3, the inner ring 91 and the outer ring 92 are formed substantially concentrically, and the inner ring 91 and the outer ring 92 are connected by a rib 93. The shape of the container member 90 can be arbitrarily changed according to the shape of the accommodating portion 85 to be installed. In the case of the present embodiment, the inner ring 91 has a flat portion 91 a in part in order to avoid interference with the wiring portion 37. As shown in FIG. 4, the inner ring 91 and the outer ring 92 are formed so as to be shifted in the axial direction. Rather than the first housing 80 side.
[0030]
As shown in FIGS. 3 and 4, the inner ring 91 and the outer ring 92 are respectively formed with protruding portions 911 and 921 that protrude in the radial direction. The protruding portion 911 formed on the inner ring 91 is formed to protrude radially inward from the inner ring 91. The protruding portion 921 formed on the outer ring 92 is formed to protrude radially outward from the outer ring 92. The protrusions 911 and 921 are formed continuously in the circumferential direction of the inner ring 91 and the outer ring 92. The protrusions 911 and 921 are formed so as to protrude from the inner ring 91 and the outer ring 92 in a direction substantially perpendicular to the axial direction.
[0031]
The inner cylindrical portion 82 of the first housing 80 is inserted on the inner peripheral side of the inner ring 91, and the resin cover 41 is formed on the outer peripheral side of the outer ring 92. The outer diameter of the outer ring 92 is formed substantially the same as the inner diameter of the outer cylindrical portion 83 of the first housing 80. Therefore, as shown in FIGS. 5 and 6, the outer peripheral wall of the outer ring 92 is in contact with the inner wall of the outer cylindrical portion 83 formed in the first housing 80, that is, the outer peripheral wall of the accommodating portion 85. Thereby, the container member 90 is positioned in the accommodating portion 85 of the first housing 80.
[0032]
When the container member is installed in the accommodating portion 85, as shown in FIG. 6A, between the first housing 80 and the container member 90, that is, the outer wall of the inner cylindrical portion 82, the inner bottom surface 84, and the inner peripheral wall of the outer ring 92 In between, the filling part 94 is formed. As shown in FIG. 6B, the filling portion 94 is filled with potting resin 95 as a filling member made of, for example, epoxy resin. When the potting resin 95 filled in the filling portion 94 is cured, the potting resin 95 and the inner bottom surface 84 of the first housing 80 are in close contact with each other.
[0033]
Next, molding of the resin cover 41 in the fluid ejecting apparatus 10 having the above configuration will be described.
An operating portion including the on-off valve 20 and the driving means 30 is inserted into the inner peripheral side of the inner cylinder portion 82 of the first housing 80. At this time, the wiring portion 37 of the driving means 30 penetrates through the first housing 80 as shown in FIG. After the operating portion is inserted into the first housing 80, the container member 90 is installed in the accommodating portion 85 of the first housing 80. The container member 90 is positioned with respect to the first housing 80 when the outer ring 92 of the container member 90 and the outer cylindrical portion 83 of the first housing 80 come into contact with each other. In addition, the wiring part 37 is inserted between the flat part 91 a of the inner ring 91 and the outer ring 92 of the container member 90.
[0034]
When the container member 90 is installed in the first housing 80, the potting resin 95 is filled in the filling portion 94 as shown in FIG. The potting resin 95 is filled in the filling portion 94 in a melted and fluid state. At this time, the outer ring 92 of the container member 90 restricts the flow of the potting resin 95 and keeps the potting resin 95 to be filled in the predetermined filling portion 94. When the filling of the potting resin 95 is completed, the potting resin 95 is cured.
[0035]
When the potting resin 95 is cured, the resin cover 41 is formed. The resin cover 41 is molded using the container member 90 installed in the first housing 80 as an insert. The first housing in which the container member 90 is installed and filled with the potting resin 95 is inserted into the mold 9. The resin forming the resin cover 41 is melted and has fluidity in the direction of the arrow in the direction of the arrow along the axis of the container member 90 from the anti-first housing side of the mold 9, that is, from above in FIG. 9 is poured into the interior. The resin flows into the periphery of the container member 90 by pouring the resin into the mold 9.
[0036]
As described above, since the melting point of the resin that becomes the resin cover 41 is higher than the melting point of the resin that becomes the container member 90, the container member 90 softens when the resin that becomes the resin cover 41 flows around the container member 90. Then melt. In particular, since the protrusions 911 and 921 of the inner ring 91 and the outer ring 92 protrude substantially perpendicularly from the axis of the container member 90 and have a small volume, they are easily melted by the resin flowing along the axis of the container member 90. . Thereby, the melted protrusions 911 and 912 are melted with the poured resin. As a result, the resin cover 41 is cured, so that the protruding portions 911 and 912 and the resin cover 41 are welded.
The resin cover 41 is formed by the above procedure, and the first housing 80 and the resin cover 41 are sealed.
[0037]
In the fluid ejection device 10 according to one embodiment of the present invention, the potting resin 95 is filled in the boundary portion between the first housing 80 and the resin cover 41. The potting resin 95 is in close contact with the first housing 80. Therefore, the engine oil in the cam chamber 63 that has entered from the boundary between the first housing 80 and the resin cover 41 is sealed at the close contact portion between the first housing 80 and the potting resin 95. Thus, the invading engine oil is prevented from flowing along the boundary between the first housing 80 and the resin cover 41 to the electrical connector 11 and the fuel connector 15 and out of the cam chamber 63. Therefore, the boundary between the resin cover 41 made of resin and the first housing 80 made of metal can be reliably sealed.
[0038]
In one embodiment of the present invention, the container member 90 is welded to the resin cover 41. Therefore, the engine oil that enters from the boundary between the first housing 80 and the resin cover 41 and flows along the outer wall of the outer ring 92 of the container member 90 is welded between the protrusion 921 of the outer ring 92 and the resin cover 41. Sealed. Thus, engine oil that has entered between the first housing 80 and the resin cover 41 from the cam chamber 63 is prevented from flowing to the electrical connector 11 along the boundary portion between the wiring portion 37 and the resin cover 41. Therefore, scattering of engine oil to the outside of the diesel engine 5 can be prevented. On the other hand, the moisture flowing from the electrical connector 11 along the boundary between the first housing 80 and the resin cover 41 is sealed at the welded portion between the protrusion 911 of the inner ring 91 and the resin cover 41. This prevents moisture that has entered from the periphery of the electrical connector 11 from flowing into the vicinity of the wiring portion 37. Therefore, corrosion of the wiring part 37 or poor contact can be prevented.
[0039]
In one embodiment of the present invention, the container member 90 is formed in a double annular shape including an inner ring 91 and an outer ring 92, and the outer ring 92 is located closer to the first housing 80 than the inner ring 91. Thereby, the space on the inner peripheral side of the outer ring 92 forming the filling portion 94 is enlarged. Therefore, filling of the potting resin 95 into the filling portion 94 can be facilitated.
[0040]
In one embodiment of the present invention, the container member 90 and the resin cover 41 are welded to prevent the engine oil and moisture from entering between the first housing 80 and the resin cover 41. By setting the melting point of the second resin forming the container member 90 to be lower than the melting point of the first resin forming the resin cover 41, the container member 90 and the resin cover 41 are welded simultaneously with the molding of the resin cover 41. can do. Therefore, the gap between the first housing 80 and the resin cover 41 can be reliably sealed without increasing the number of steps and complicating the manufacturing process.
[0041]
Further, in one embodiment of the present invention, the protrusions 911, 921 formed on the inner ring 91 and the outer ring 92 of the container member 90 are generally from the inner ring 91 and the outer ring 92 to the axis of the container member 90, respectively. It is formed vertically. Therefore, the protrusions 911 and 921 are easily melted by the first resin poured along the axial direction of the container member 90. Therefore, the container member 90 and the resin cover 41 can be reliably welded.
[0042]
(Modification)
Next, a modified example of the container member of the fluid ejection device 10 according to an embodiment of the present invention will be described.
As shown in FIGS. 7 and 8, the positional relationship between the inner ring 91 and the outer ring 92 of the container member 90 can be changed.
[0043]
In the case of the container member 90 shown in FIG. 7, the upper end portion 91 c of the inner ring 91, that is, the end portion on the side opposite to the first housing, is substantially at the same position as the upper end portion 92 c of the outer ring 92. As a result, the overall length of the outer ring 92 in the axial direction is increased. Therefore, the rib 93 connecting the inner ring 91 and the outer ring 92 is enlarged and the strength is increased. As a result, deformation of the inner ring 91 is prevented. Therefore, the inner ring 91 can be prevented from being deformed in the radial direction when the first resin forming the resin cover 41 is filled.
[0044]
In the case of the container member 90 shown in FIG. 8, at least a part of the outer ring 92 in the circumferential direction has the upper end portion 92 c substantially in the same position as the upper end portion 91 c of the inner ring 91. Therefore, similarly to the container member 90 shown in FIG. 7, the rib 93 can be enlarged and the strength can be increased. Therefore, deformation of the inner ring 91 at the time of filling the first resin can be prevented.
[0045]
In the above-described embodiment of the present invention, the example in which the fluid injection device is applied to the exhaust purification system of a diesel engine has been described. However, the fluid injection device of the present invention is not limited to the exhaust purification system, and can also be applied to a fluid injection device that injects fuel into a fuel intake system or a combustion chamber. The material and shape of the resin cover and the container member can be changed as appropriate. Furthermore, although the example which forms the protrusion part currently formed in the container member in one place of an axial direction was demonstrated, you may form two or more places in an axial direction.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a fluid ejecting apparatus according to an embodiment of the present invention, and showing a state in which the fluid ejecting apparatus is mounted on an engine head.
FIG. 2 is a schematic view showing an exhaust purification system to which a fluid ejecting apparatus according to an embodiment of the present invention is applied.
FIG. 3 is a schematic view showing a container member of a fluid ejection device according to an embodiment of the present invention, as viewed from the side opposite to the first housing.
4 is a cross-sectional view taken along line VI-VI in FIG.
FIG. 5 is a cross-sectional view showing a fluid ejection device according to an embodiment of the present invention, and is an enlarged view of the vicinity of a boundary portion between a resin cover and a first housing.
6A is a cross-sectional view illustrating a state where a container member is accommodated in a first housing, and FIG. 6B is a cross-sectional view illustrating a state where potting resin is filled in a fluid ejecting apparatus according to an embodiment of the present invention.
FIG. 7 is a schematic view showing a modification of the container member of the fluid ejection device according to the embodiment of the present invention.
FIG. 8 is a schematic view showing a modified example of the container member of the fluid ejection device according to the embodiment of the present invention.
FIG. 9 is a cross-sectional view showing a conventional fluid ejecting apparatus.
[Explanation of symbols]
10 Fluid ejection device
41 Resin cover
80 First housing (housing)
85 containment
90 Container members
91 Inner ring
92 Outer ring
94 Filling section
95 Potting resin (filling material)
911, 921 Projection

Claims (10)

A housing made of metal,
A resin cover adjacent to the housing;
At the boundary between the housing and the resin cover, it is filled so as to close one end of the boundary, and includes a filling member that is in close contact with the housing and the resin cover ,
The fluid ejecting apparatus according to claim 1, further comprising a container member that forms a filling portion that is filled with the filling member together with the housing and restricts the flow of the filling member . The fluid ejecting apparatus according to claim 1, wherein the container member is made of a resin having a melting point lower than that of the resin cover. The fluid ejecting apparatus according to claim 1, wherein the container member includes an annular inner ring and an outer ring connected to an outer peripheral side of the inner ring. The fluid ejecting apparatus according to claim 3, wherein an end of the outer ring on the housing side is located closer to the housing than the inner ring. 5. The fluid ejecting apparatus according to claim 3, wherein the inner ring and the outer ring have a protruding portion protruding in a radial direction. The fluid ejecting apparatus according to claim 5, wherein the protruding portion protrudes radially inward from the inner ring and protrudes radially outward from the outer ring. The housing has an accommodating portion capable of accommodating the container member at an end portion on the resin cover side, and an outer peripheral wall of the accommodating portion is in contact with an outer wall of the outer ring of the container member. The fluid ejecting apparatus according to claim 3. A manufacturing method of a fluid ejecting apparatus including a housing made of metal and a resin cover adjacent to the housing,
  Installing a container member made of a resin having a lower melting point than the resin cover in the housing;
  Inserting the container member and filling the resin to be the resin cover, melting the container member, and welding the container member and the resin cover;
  A method of manufacturing a fluid ejecting apparatus comprising: The method for manufacturing a fluid ejecting apparatus according to claim 8, wherein the container member has a protruding portion that is melted at a stage of welding the container member and the resin cover. The fluid ejecting apparatus according to claim 8, wherein the projecting portion is formed so as to project from the container member substantially perpendicularly to a resin filling direction when the resin cover is molded.

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