WO2019224929A1

WO2019224929A1 - Fuel injection valve

Info

Publication number: WO2019224929A1
Application number: PCT/JP2018/019747
Authority: WO
Inventors: 恭輔渡邉; 章男新宮; 範久福冨; 宗実　毅; 学平井
Original assignee: 三菱電機株式会社
Priority date: 2018-05-23
Filing date: 2018-05-23
Publication date: 2019-11-28
Also published as: CN112135966A; JP7019804B2; CN112135966B; JPWO2019224929A1

Abstract

In a fuel injection valve wherein control is performed on control current for a coil (1) so as to control the amount of fuel that flows inside a jacket (18) and that is injected to the outside from a valve body (17), a connector terminal (19) to which the control current for the coil (1) is supplied from the outside has, on the upstream side of a terminal part (191) thereof, a clip part (192) for pinching a portion of an upstream-side outer circumference of the jacket (18); the connector terminal (19) holds the jacket (18) via the clip part (192); and the terminal part (191) of the connector terminal (19) and a coil terminal (5) of the coil (1) are electrically and mechanically connected to each other so as to enable minimizing variation in the relative position between the connector terminal (19) and the coil terminal (5).

Description

Fuel injection valve

The present application relates to a fuel injection valve used for supplying fuel to an internal combustion engine of an automobile.

2. Description of the Related Art Conventionally, fuel injection valves used in internal combustion engines are fixed inside an electromagnetic coil, an arm that is a part of a valve body and a core that face each other with a constant distance between end faces when the electromagnetic coil is not energized, and the core. And a spring that is compressed by the rod and biases the valve body in the valve closing direction. When the electromagnetic coil is energized, the amateur is magnetically attracted to the core against the force of the spring, and the valve body moves to the core along with this, the armature and the core come into contact, the valve opens, and fuel is injected. The (Valve open state)
When the energization of the electromagnetic coil is completed, the armature is returned together with the valve body in the valve closing direction by the force of the spring, and the fuel is sealed by the tip of the valve body contacting the seat portion. (Valve closed)

As for the configuration of the fuel injection valve, various forms are known based on known techniques. In the configuration shown in Patent Document 1 (Special Table 2004-518849), a hollow shape is formed on the inner diameter side of the bobbin around which the coil is wound. There is a jacket which is a pipe, and a valve body including a core and an amateur, a valve seat, and the like are accommodated in the jacket. Also, it is made of resin that has a terminal part for connecting to an external terminal on the one hand and a terminal part for connecting to a coil terminal on the other hand, and is fastened to a tube that is a hollow extension pipe press-fitted into the upstream end face of the jacket. A connector terminal having a clip portion is provided.
The connector-side terminal and the coil terminal are oriented parallel to each other, and are described as being coupled and conducted by a suitable technique such as welding, brazing or bonding or clamping, or plug-in coupling.
Special Publication 2004-518849

In the shape described in Patent Document 1, a jacket passes through a bobbin integrally formed with a coil terminal.
The connector terminal is supported by the extension pipe by holding the outer periphery of the extension pipe at a position where the resin clip portion integrally molded with the connector terminal is separated from the coil in the axial direction.
The connector terminal and the coil terminal support different parts, and the support parts are separated, so the position variation between the connector terminal and the coil terminal becomes large. There was a problem that required a process.

This application discloses a technique made to solve the above-described problem, and aims to suppress variations in relative position between the coil terminal and the connector terminal.

As illustrated in FIG. 1, the fuel injection valve disclosed in claim 1 of the present application is a fuel that flows through the inside of the jacket and is injected from the valve body by controlling the control current to the coil. In the fuel injection valve whose amount is controlled, a terminal portion of a connector terminal that integrally has a clip portion that sandwiches an outer periphery of a predetermined portion on the upstream side of the jacket, and that is supplied with a control current to the coil from the outside, The fuel injection valve is electrically and mechanically connected to the coil terminal of the coil, and the fuel injection valve disclosed in claim 2 of the present application is connected to the coil as illustrated in FIG. In the fuel injection valve in which the amount of fuel that flows through the jacket and is injected from the valve body to the outside is controlled by controlling the control current, the control current to the coil is supplied from the outside. The Kuta terminal has a clip portion that sandwiches a part of the outer periphery on the upstream side of the jacket on the upstream side of its own terminal portion, the connector terminal holds the jacket via the clip portion, and the connector In the fuel injection valve, the terminal portion of the terminal and the coil terminal of the coil are electrically and mechanically connected.

In the fuel injection valve disclosed in claim 5 of the present application, as illustrated in FIG. 4, a concave portion is formed in a portion corresponding to the coil terminal of the clip portion, and the terminal portion and the coil are formed in the concave portion. This is a fuel injection valve whose position relative to the terminal is fixed.

The fuel injection valve disclosed in claim 6 of the present application, as illustrated in FIG.
A convex portion is provided on one of the clip portion and the coil terminal, and a concave portion is provided on the other, and the relative position between the terminal portion and the coil terminal is determined by fitting the convex portion and the concave portion. It is a fuel injection valve.

The fuel injection valve disclosed in claim 7 of the present application, as illustrated in FIG.
An end portion on the downstream side of the tube through which the fuel flows is inserted into an end portion on the upstream side of the jacket, and the connector is located on the upstream side from a portion where the terminal portion and the coil terminal are connected. The fuel injection valve is provided with a resin portion interposed between the terminal and the tube.

By using the structure of the fuel injection valve disclosed in claim 1 or claim 2 of the present application, an effect of suppressing variation in relative position between the coil terminal and the connector terminal can be obtained.

By adopting the structure of the fuel injection valve disclosed in claim 5 or claim 6 of the present application,
This leads to further suppression of variations in relative position between the coil terminal and the connector terminal.

By adopting the structure of the fuel injection valve disclosed in claim 7 of the present application, the effect of suppressing the positional variation at the lower end side of the connector terminal is obtained, leading to the suppression of the variation in the relative position between the coil terminal and the connector terminal.

It is a figure which shows Embodiment 1 of this application, and is sectional drawing which shows an example of a fuel injection valve. It is a figure which shows Embodiment 1 of this application, and is sectional drawing of the insert goods which are the semi-finished products in the fuel injection valve illustrated in FIG. It is a figure which shows Embodiment 2 of this application, and is sectional drawing which shows the other example of the insert goods which are the semi-finished products in a fuel injection valve. It is a figure which shows Embodiment 2 of this application, and is the perspective view which expands and shows the coil terminal and connector terminal in FIG. 3 partially in cross section, Comprising: The state before attaching a clip part to a jacket is illustrated. It is. It is a figure which shows Embodiment 3 of this application, and is a perspective view which shows another example of a coil terminal and a connector terminal, making a part a cross section, Comprising: The state before attaching a clip part to a jacket is illustrated . It is a figure which shows Embodiment 4 of this application, and is sectional drawing which shows the other example of a fuel injection valve.

Hereinafter, embodiments for carrying out the technology disclosed in the present application will be described with reference to the drawings.
Embodiment 1.
The fuel injection valve according to the first embodiment illustrated in FIGS. 1 and 2 will be described.
1 and 2, the coil 1, the bobbin 2, the core 3, the housing 4, the coil terminal 5, the cover 6, the spring 7, the armature 8, the solenoid device 9, the rod 10, the pipe 11, the seat surface 12, the ball 14, Valve seat 15, plate 16, valve body 17, jacket 18, flange part 181, connector terminal 19, terminal part 191, clip part 192, tube 20, connector part 21, resin sheath 22, first resin injection gate 22img1 The second resin injection gate 22img2 and the injected fuel flow FFA are illustrated as shown.

Hereinafter, the supply side of the fuel injection fuel is referred to as “upstream side”, and the supply side is referred to as “downstream side”.
The coil 1 is wound around a cylindrical bobbin 2 made of insulating resin in a cylindrical shape.
The cylindrical core 3 is fitted and welded to the inner peripheral wall of the cylindrical jacket 18 at a position corresponding to the coil 1.
A two-stage cylindrical housing 4 is fitted and welded to the outer periphery of the jacket 18.

The bobbin 2 around which the coil 1 is wound is inserted from the opening of the large-diameter portion on the upstream side of the housing 4 and stored in the large-diameter portion on the upstream side of the housing 4. The opening on the upstream side of the housing 4 in which the bobbin 2 around which the coil 1 is wound is housed is covered with a metal cover 6.
A cylindrical rod 10 is fitted and welded to the upstream inner wall of the cylindrical core 3. The upstream end surface of the cylindrical rod 10 is located downstream of the upstream flange portion 181 of the jacket 18.

A cylindrical armature 8 is located downstream of the cylindrical core 3 and is disposed in the jacket 18 so as to be movable in the direction of the injected fuel flow FFA.
A spring 7 as a compression spring is inserted between the amateur 8 and the rod 10. Since the rod 10 is fixed to the jacket 18 via the core 3, the urging force of the spring 7 is always applied to the armature 8 on the downstream side.

The coil terminal 5 of the coil 1 extends outside the bobbin 2 through a notch provided in a part of the cover 6. The coil terminal 5 extends along the outer wall surface of the jacket 18 in parallel with the direction of the injected fuel flow FFA.

The solenoid device 9 is composed of the coil 1, the bobbin 2, the core 3, the housing 4, the coil terminal 5, and the cover 6. Further, a valve body 17 is constituted by the amateur 8, the pipe 11, and the ball 14.

The outer peripheral surface of the downstream end portion of the cylindrical tube 20 into which fuel is injected from the upstream side is in close contact with the inner peripheral surface of the upstream end portion of the jacket 18. As a result of this fitting, the outer periphery of the jacket 18 is clamped by its own elastic force at a portion where the downstream end of the tube 20 and the upstream end of the jacket 18 have a double pipe structure in the radial direction. The connector terminal 19 passes through the resin-made planar shape C-shaped clip portion 192 in the vertical direction in the figure. The clip part 192 and the connector terminal 19 are integrally formed by resin molding.

The downstream end portion of the connector terminal 19 protrudes downstream from the clip portion 192, and extends along the outer wall surface of the jacket 18 in parallel with the direction of the injected fuel flow FFA. The downstream end of the connector terminal 19 that protrudes downstream from the clip portion 192 and extends along the outer wall surface of the jacket 18 in parallel with the direction of the flow FFA of the injected fuel extends along the outer wall surface of the jacket 18. Therefore, the jacket 18 is positioned on the radially outer side of the coil terminal 5 extending in parallel with the direction of the flow FFA of the injected fuel. When viewed in the radial direction of the jacket 18, the terminal portion 191 and the coil terminal 5 on the downstream side of the connector terminal 19 have a double structure in the radial direction. In this double structure portion, the downstream side of the connector terminal 19 And the coil terminal 5 are joined by a joining means such as soldering or brazing.

The clip portion 192 is located between the flange portion 181 of the jacket 18 and the coil terminal 5 when viewed in the extending direction of the jacket 18. In other words, in the drawing, the clip portion 192 is located between the flange portion 181 of the jacket 18 and the coil terminal 5. In other words, the flange portion 181 is located adjacent to the upstream side of the clip portion 192, and the coil terminal 5, the terminal portion 191, and the coil terminal 5 and the terminal portion 191 are joined to the downstream side of the clip portion 192. Each part 23 is located.

The upstream end of the circular pipe 11 is press-fitted and fixed to the downstream end of the cylindrical armature 8, and the ball 14 is integrally attached to the downstream end.
The plate 16 is positioned on the downstream side of the ball 14 and is attached to the inner periphery of the jacket 18. The plate 16 is provided with a plurality of fuel injection holes (not shown).

The annular valve seat 15 is located between the pipe 11 and the plate 16 and is fitted and fixed to the inner periphery of the jacket 18. The seat surface 12 on the inner peripheral side of the annular valve seat 15 is inclined with respect to the center line of the valve seat 15 so that the distance from the center line of the valve seat 15 decreases from the upstream side toward the downstream side. doing. Therefore, the space surrounded by the seat surface 12 has a truncated cone shape in which the diameter of the circle is smaller on the downstream side than on the upstream side.

As shown in FIG. 1, coil 1, bobbin 2, core 3, housing 4, spring 7, armature 8, rod 10, pipe 11, ball 14, valve seat 15, plate 16, ball 14, valve seat 15, plate 16, the flange portion 181, the clip portion 192, and the tube 20 are located on the same axis.

The operation principle of the fuel injection valve will be described. An operation signal is sent from the engine control device (not shown) to the fuel injection valve drive device (not shown), a control current flows from the connector terminal 19 to the coil 1 through the coil terminal 5, and the armature 8 is attached to the spring 7. When the ball 14 moves away from the valve seat 15 and opens the valve against the force, the fuel supplied to the upstream side of the tube 20 flows into the tube 20 as shown by the fuel flow FFA. Through the rod 10, the spring 7, the amateur 8, the pipe 11, the frustoconical space between the ball 14 and the valve seat 15, and the engine intake passage ( (Not shown). FIG. 1 illustrates a state in which the valve is fully closed.

When no control current flows through the coil 1, the armature 8 is moved downstream by the biasing force of the spring 7, the ball 14 is also moved downstream via the pipe 11, and the ball 14 is pressed against the valve seat 15. The fuel injection from the fuel injection holes of the plate 16 is not performed.

Accordingly, the flow of the control current to the coil 1 causes the fuel to move to the fuel injection holes (illustrated) of the plate 16 by the vertical movement of the ball 14 through the pipe 11 accompanying the vertical movement of the armature 8 in the figure. (Not shown) is injected into the engine intake passage (not shown).

FIG. 2 is a cross-sectional view of an insert product which is a semi-finished product of the fuel injection valve illustrated in FIG. 2 inserts are coil 1, bobbin 2, core 3, housing 4, coil terminal 5, cover 6, spring 7, armature 8, rod 10, pipe 11, seat surface 12, ball 14, valve seat 15, plate 16, the valve body 17, the jacket 18, the flange part 181, the connector terminal 19, the terminal part 191, and the clip part 192 are configured as shown in the figure. The representative reference number for the insert is 13.

The semi-finished product in which the end on the upstream side of the jacket 18 and the end on the downstream side of the cylindrical tube 20 in the insert 13 of the fuel injection valve illustrated in FIG. A resin is injected into the mold from the first resin injection gate 22img1 and the second resin injection gate 22img2, and the connector portion 21 and the resin casing 22 are formed. As shown in the figure, the first resin injection gate 22img1 is generally located on the side opposite to the connector portion 21, and the second resin injection gate 22img2 corresponds to the small diameter cylindrical portion of the two-stage cylindrical housing 4. The first resin injection gate 22img1 is located on the same side (the side opposite to the connector portion 21).

The fuel injection valve consists of a resin bobbin 2 around which a coil 1 is wound, a metal core 3, a two-stage cylindrical housing 4, and a bobbin 2 covered in a lid shape and welded to a part of the outer periphery of the housing 4. A solenoid device 9 composed of a metal cover 6 having a notch that is fixed and serves as an outlet of the coil terminal 5 of the electrode, and a valve mechanism by a magnetic attraction force caused by a magnetic field generated in the solenoid device 9 and pressing of the spring 7 And a valve device having a movable valve body 17.
Further, the fuel injection valve is configured such that the spring 7 compressed by the rod 10 fixed inside the core 3 applies a load to the valve body 17 in the downstream direction, thereby causing a valve mechanism (ball 14, valve seat 15, plate The valve closed state of 16) is maintained.

The valve device of the fuel injection valve is in contact with a conical seat surface 12 whose diameter decreases toward the downstream side, a valve seat 15 having a cylindrical opening on the downstream side of the seat surface 12, and the seat surface 12 A plate 16 that has a fuel injection injection hole fixed to the downstream end face of the valve seat 15 and the ball 14 that is separated from the seat surface 12 and allows the fuel to flow out of the opening. An armature 8 that is attracted and displaced toward the core 3 in a direction away from the valve seat 15 by electromagnetic force, a pipe 11 that connects the armature 8 and the ball 14, a valve body 17 that includes the armature 8, the pipe 11, and the ball 14, the core 3, the amateur The bobbin 2 is held by the jacket 18 at the inner diameter portion.

In addition, on the other hand, it has a terminal portion 191 for connecting to the external terminal and on the other hand to the coil terminal 5, and in the resin clip portion 192 integrally molded with the terminal portion 191, the jacket 18 is partially The first embodiment includes a connector terminal 19 that holds itself by being enclosed.

Bobbin 2 in which coil 1 is wound and coil terminal 5 extends to the outside and connector terminal 19 both hold jacket 18 and are therefore assembled for holding separate parts as in the conventional example. It is possible to suppress relative positional variations between terminals at the time. Thereby, the process of correcting the positions of the terminals with a jig can be omitted, which leads to an improvement in productivity.

In addition, for joining the coil terminal 5 and the terminal part 191, for example, a method by soldering is assumed. In this case, the soldering direction changes depending on the amount of the gap between the coil terminal 5 and the terminal part 191. Management of the amount of gap is greatly related to the stability of the joined state. By adopting the shape and structure of the present embodiment, it is held at a location closer to the joining position between the terminals than in the conventional example, so that variation in the amount of gap between the coil terminal 5 and the terminal portion 191 is suppressed. As a result, an effect of stabilizing the solder joint is obtained.

In the first embodiment, as described above, the amount of fuel flowing through the jacket 18 and injected from the valve body 17 to the outside is controlled by controlling the control current to the coil 1. In the fuel injection valve, a terminal portion 191 of a connector terminal 19 integrally having a clip portion 192 sandwiching the outer periphery of a predetermined portion on the upstream side of the jacket 18 and supplied with a control current to the coil 1 from the outside, A fuel injection valve in which a coil terminal 5 of a coil 1 is electrically and mechanically connected is disclosed, and the clip portion 192 is located upstream of the coil 1, and the terminal portion 191 and the coil A fuel injection valve is disclosed in which the portion connected to the terminal 5 is located upstream of the coil 1.

In the first embodiment, as described above, the valve seat 15 having a conical seat surface whose diameter decreases toward the downstream side, and the valve that is attracted and displaced in a direction away from the valve seat 15 by electromagnetic force. Body 17, armature 8 which is a part of valve body 17 and serves as a suction portion, spring 7 which applies force in the direction of closing valve body 17, core 3 which is opposed to armature 8 and which is a fixed iron core, valve seat 15 and valve body A jacket 18 for accommodating 17 and the core 3 therein, a resin bobbin 2 disposed on the outer peripheral side of the core 3, a coil 1 wound around the bobbin 2, and a coil terminal 5 electrically connected to the coil wire of the coil 1 And, on the other hand, a connector terminal 19 that is energized while being in contact with an external terminal and conductively connected to the coil terminal 5, and by operating the valve body 17 in response to an operation signal from the control device, the valve body 17 is Magnetic absorption on the core 3 side against the force of the spring 7 In an electromagnetic fuel injection valve for an internal combustion engine that constitutes a valve mechanism by being attached to and detached from the valve seat 15, the bobbin 2 is supported by being press-fitted into the jacket 18 at an inner diameter portion, and the connector terminal 19 is A fuel injection valve having a resin-made clip portion 192 supported by partially surrounding and contacting the outer periphery of the jacket 18 is disclosed.

Embodiment 2. FIG.
A cross-sectional view of the insert product of the fuel injection valve of the second embodiment shown in FIG. 3 will be described. 4 is an enlarged explanatory view of the main part of FIG.
The resin clip portion 192 of the connector terminal 19 of the fuel injection valve according to the second embodiment is provided with a recess 193 having a surface 193A parallel to the coil terminal 5, and the clip portion 192 is attached to the jacket 18 and the jacket 18 is attached to the jacket 18 The surface 193A of the recess 193 is configured so as to be in contact with the coil terminal 5 in a state of being attached in an elastically sandwiched state. Since the clip portion 192 having the connector terminal 19 integrated with the jacket 18 is assembled with the coil terminal 5 in contact with the surface 193A of the recess 193, the radial position of the connector terminal 19 is directly defined with respect to the coil terminal 5. As a result, the terminal portion 191 and the coil terminal 5 are further suppressed in positional variation.
When the coil terminal 5 and the terminal part 191 are joined with solder, the amount of clearance between the coil terminal 5 and the terminal part 191 can be managed more easily, and the joining between the coil terminal 5 and the terminal part 191 is more stable. Effect is obtained.

In the second embodiment, as described above, a concave portion 193 is formed in a portion corresponding to the coil terminal 5 of the clip portion 192, and the terminal portion 191 and the coil terminal 5 are formed by the concave portion 193. A fuel injection valve having a fixed relative position is disclosed, and the clip portion 192 is provided with a recess 193 parallel to the coil terminal 5, and the relative position of the coil terminal 5 in the connector terminal 19 and the recess is determined. A defined fuel injection valve is disclosed.

Embodiment 3 FIG.
A description will be given based on an enlarged explanatory view of a main part of an insert product of the fuel injection valve of the third embodiment shown in FIG. The resin clip portion 192 of the connector terminal 19 of the fuel injection valve according to the third embodiment is provided with two

convex portions

194, 194, and the coil terminal 5 corresponds to the

convex portions

194, 194. Since the

holes

51 and 51 are provided, and the connector terminal 19 has the

projections

194 and 194 fitted into the

holes

51 and 51 and is fitted with the coil terminal 5, the clip part 192 is assembled to the jacket 18. The radial position of the connector terminal 19 is directly defined with respect to the coil terminal 5, and the terminal portion 191 and the coil terminal 5 are further restrained from variation in interphase position. When the coil terminal 5 and the terminal part 191 are joined with solder, the amount of clearance between the coil terminal 5 and the terminal part 191 becomes easier to manage, and the coil terminal 5 and the terminal part 191 are more easily joined. A stable effect is obtained.
The same effect can be obtained even if the

convex portions

194 and 194 are provided on the coil terminal 5 side and the

holes

51 and 51 that fit into the

convex portions

194 and 194 are provided on the clip portion 192 side.

In the third embodiment, as described above, a convex portion 194 is provided on one of the clip portion 192 and the coil terminal 5, and a concave portion 193 is provided on the other side. A fuel injection valve is disclosed in which the relative position between the terminal part 191 and the coil terminal 5 is fixed by fitting with the concave part 193, and the clip part 192 is provided with a convex part 194, and the coil terminal 5 is provided with a hole 51, and the connector terminal 19 discloses a fuel injection valve whose relative position with respect to the coil terminal 5 is defined by the fitting of the projection 194 and the hole 51.

Embodiment 4 FIG.
A cross-sectional view of the fuel injection valve of the fourth embodiment shown in FIG. 6 will be described. A flange portion 181 is formed on the upstream end surface of the jacket 18, and a tube 20, which is a hollow extension pipe, is press-fitted on the upstream end surface of the jacket 18. Forming.
In addition, a resin-made resin part 195 protruding in the radial direction to a position substantially along the tube 20 is provided between the tube 20 and the portion extending in the axial direction of the fuel injection valve on the upstream side of the clip part 192 of the connector terminal 19. Provided.
The axial length L1 of the fuel injection valve of the resin portion 195 is 50% or more of the length L2 of the portion extending in the axial direction of the fuel injection valve of the connector terminal 19, so that the connector terminal 19 The outer periphery of the tube 20 is supported against the inclination of the injection valve with respect to the axial direction, and the effect of suppressing the positional variation on the lower end side of the connector terminal 19 is obtained. The relative positional variation between the coil terminal 5 and the terminal portion 191 Leads to suppression.

Here, when molding the connector portion 21 (male side) for connection with an external power source, drive circuit, etc. by resin injection into a resin injection mold, the tube 20 and the housing including the solder portion are included. A part of 4 is formed so as to be covered with a resin jacket 22.
At that time, the first resin injection gate 22img1 and the second resin injection gate 22img2 are arranged at two locations opposite to the connector portion 21, and the axial positions are the connector portion 21 on the upstream side and the housing on the downstream side, respectively. The resin portion (resin portion 195, clip portion 192) of the connector terminal 19 is affected by the resin flow from both gates.
That is, the upper surface of the resin portion 195 is a force F1 in a direction to be pushed down downstream by the resin from the upstream first resin injection gate 22img1, and the lower surface of the clip portion 192 is from the downstream second resin injection gate 22img2. A force F2 is applied in the direction of pushing the resin upstream. The force applied to the resin part 195 and the clip part 192 receives the force from both the upstream side and the downstream side depending on the progress of molding, and therefore the terminal joint part 23 receives a force in the direction in which the joint is separated.

Therefore, the resin portion 195 and the clip portion 192 sandwich the flange portion 181 of the jacket 18 as in the shape of the present embodiment, and the upper surface or the lower surface of the flange portion 181 of the jacket 18 is in contact with the clip portion 192. When the force that pushes the upper surface of the resin part 195 downstream and the force that pushes the lower surface of the clip part 192 upstream is applied, the support of the flange part 181 of the jacket 18 reduces the force applied to the joint part. The effect that the reliability of a part improves is acquired.
Further, by providing the resin portion 195, the flow of the resin into the resin portion 195 is suppressed, and the force F3 to the outer diameter side received by the connector terminal 19 due to the resin flow at the time of molding can be suppressed. The force applied to the joint 23 is suppressed, and the reliability of the joint 23 is improved. Further, since the force on the outer diameter side is suppressed, an effect of preventing the connector terminal 19 from being exposed to the outside can be obtained.

As in the second embodiment, when the coil terminal 5 and the terminal portion 191 are joined by soldering, the amount of clearance between the coil terminal 5 and the terminal portion 191 can be managed more easily. The effect of more stable joining with the portion 191 is obtained.

In the fourth embodiment, as exemplified in FIG. 6, the following technical features are disclosed.
That is, the downstream end portion of the tube 20 that is a hollow extension pipe through which fuel flows is inserted into the upstream end portion of the jacket 18.
A resin portion 195 located between the connector terminal 19 and the tube 20 is provided on the upstream side of the portion where the terminal portion 191 and the coil terminal 5 are connected. The resin part 195 is integrated with the connector terminal 19. A resin portion 195 is integrally provided on a straight portion of the connector terminal 19 that extends in parallel with the axis of the fuel injection valve. The resin portion 195 extends in parallel with the axis of the fuel injection valve. And a structure projecting radially from the straight portion of the connector terminal 19 toward the tube 20. The resin part 195 and the clip part 192 having such a structure are integrally formed by molding.
Further, a flange portion 181 is provided at the upstream end portion of the jacket 18, and the upstream portion of the clip portion 192 and the resin portion 195 is contacted with the flange portion 181 and at least one of the clip portion 192 and the resin portion 195. The downstream position is fixed. In addition, as illustrated in FIG. 6, the integral structure of the resin portion 195 and the clip portion 192 has a structure in which a groove extending in the circumferential direction is provided at the boundary between the resin portion 195 and the clip portion 192. A structure in which a part of the outer periphery of the flange portion 181 is fitted in the groove is preferable.

1 to 3 and 6, a gap is provided between the coil terminal 5 and the terminal part 191 on the assumption that the coil terminal 5 and the terminal part 191 are joined by solder. However, the bonding method between the two, the presence or absence of a gap, and the like are not limited thereto.

In addition, in each figure, the same code | symbol shows the same or equivalent part.
Note that although various exemplary embodiments and examples are described in this application, various features, aspects, and functions described in one or more embodiments may be described in particular embodiments. The present invention is not limited to the above-described application, but can be applied to the embodiments alone or in various combinations.
Accordingly, innumerable modifications not illustrated are envisaged within the scope of the technology disclosed in the present application. For example, the case where at least one component is deformed, the case where the component is added or omitted, the case where the at least one component is extracted and combined with the component of another embodiment are included.

1 coil, 2 bobbins, 3 cores, 4 housings, 5 coil terminals, 51 holes, 6 covers, 7 springs, 8 amateurs, 9 solenoid devices, 10 rods, 11 pipes, 12 seat surfaces, 13 inserts, 14 balls, 15 Valve seat, 16 plate, 17 disc, 18 jacket, 181 flange part, 19 connector terminal, 191 terminal part, 192 clip part, 193 concave part, 193A surface, 194 convex part, 195 resin part, 20 tube, 21 connector part, 22 resin jacket, 22img1 first resin injection gate, 22img2 second resin injection gate, 23 terminal joint, FFA injected fuel flow.

Claims

In the fuel injection valve in which the amount of fuel that flows through the inside of the jacket and is injected from the valve body is controlled by controlling the control current to the coil,
A terminal portion of a connector terminal integrally having a clip portion sandwiching an outer periphery of a predetermined portion on the upstream side of the jacket, and a coil terminal of the coil are electrically and mechanically supplied with a control current to the coil from the outside. The fuel injection valve is characterized in that it is connected.
In the fuel injection valve in which the amount of fuel that flows through the inside of the jacket and is injected from the valve body is controlled by controlling the control current to the coil,
The connector terminal to which the control current to the coil is supplied from the outside has a clip portion that sandwiches a part of the outer periphery on the upstream side of the jacket on the upstream side of its own terminal portion,
The connector terminal holds the jacket through the clip portion;
The fuel injection valve, wherein the terminal portion of the connector terminal and the coil terminal of the coil are electrically and mechanically connected.
The fuel injection valve according to claim 1 or 2, wherein a bobbin around which the coil is wound and the coil terminal extends to the outside is held by the jacket.
The clip part is located upstream from the coil, and a portion where the terminal part and the coil terminal are connected is located upstream from the coil. 4. The fuel injection valve according to any one of 3.
The concave portion is formed in a portion of the clip portion corresponding to the coil terminal, and the relative position between the terminal portion and the coil terminal is determined by the concave portion. The fuel injection valve according to one item.
A convex part is provided on one of the clip part and the coil terminal, and a concave part is provided on the other, respectively.
The fuel injection valve according to any one of claims 1 to 5, wherein a relative position between the terminal portion and the coil terminal is determined by the fitting of the convex portion and the concave portion. .
At the upstream end of the jacket, the downstream end of the tube through which the fuel flows is inserted,
The resin part which is located upstream from the part where the terminal part and the coil terminal are connected and is interposed between the connector terminal and the tube is provided. The fuel injection valve according to claim 6.
The fuel injection valve according to claim 7, wherein the clip portion and the resin portion are integrated.
A flange is provided at the upstream end of the jacket,
The fuel injection valve according to claim 8, wherein positions of the clip portion and the resin portion in an upstream direction and a downstream direction are determined by the flange portion.
The upstream and downstream positions of the terminal portion of the connector terminal are determined by determining the upstream and downstream positions of the clip portion and the resin portion. The fuel injection valve as described.