JPWO2019224929A1 - Fuel injection valve - Google Patents

Abstract

In a fuel injection valve in which the amount of fuel injected from the valve body (17) to the outside flows through the inside of the jacket (18) by controlling the control current to the coil (1), the coil (1) The connector terminal (19) to which the control current is supplied from the outside has a clip portion (192) that sandwiches a part of the outer circumference on the upstream side of the jacket (18) on the upstream side of its own terminal portion (191). Then, the connector terminal (19) holds the jacket (18) via the clip portion (192), and the terminal portion (191) of the connector terminal (19) and the coil terminal (5) of the coil (1) are electrically connected. By being physically and mechanically connected, it is possible to suppress variations in the relative positions of the connector terminal (19) and the coil terminal (5).

Description

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

Conventionally, a fuel injection valve used in an internal combustion engine is fixed to an electromagnetic coil, a core whose end faces face each other at a constant interval when the electromagnetic coil is not energized, and an amateur who is a part of a valve body, and inside the core. It has a spring that is compressed by the rod and urges the valve body in the valve closing direction. When the electromagnetic coil is energized, the amateur is magnetically attracted to the core side against the force of the spring, and along with this, the valve body moves to the core side, the amateur and the core come into contact, the valve opens, and fuel is injected. To. (Valve open state)
When the energization of the electromagnetic coil is completed, the amateur is returned to the valve closing direction together with the valve body by the force of the spring, and the fuel is sealed by the valve body tip contacting the seat portion. (Valve closed)

Various forms of the fuel injection valve are known based on known technology, and in the configuration shown in Patent Document 1 (Japanese Patent Laid-Open No. 2004-518849), the structure is hollow on the inner diameter side of the bobbin around which the coil is wound. There is a jacket that is a pipe, and the valve body, the valve seat, and the like including the core and the amateur are housed in the jacket. Further, it is made of resin and has a terminal portion for connecting to an external terminal on the one hand and a coil terminal on the other hand, and is fastened to a tube which is a hollow extension pipe press-fitted into the upstream end face of the jacket. It is equipped with a connector terminal having a clip portion.
It is stated that the terminal on the connector side and the coil terminal are oriented parallel to each other and are coupled and conducted by an appropriate technique such as welding, brazing or bonding or tightening, or plug-in coupling.
Special Table 2004-518849 Gazette

In the shape described in Patent Document 1, the jacket penetrates into the bobbin in which the coil terminal is integrally molded.
The connector terminal is supported by the extension pipe by holding the outer circumference of the extension pipe at a position where a resin clip portion integrally molded with the connector terminal is axially separated from the coil.
Since the parts that support the connector terminal and the coil terminal are different, and the parts that support them are separated, the positional variation between the connector terminal and the coil terminal becomes large, and when joining the two, the positional variation is corrected with a jig or the like. There was a problem that a process was required.

The present application discloses a technique made to solve the above-mentioned problems, and an object of the present application is to suppress variations in relative positions between a coil terminal and a connector terminal.

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

The fuel injection valve disclosed in claim 6 of the present application is as illustrated in FIG.
A convex portion is provided on either 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 the fitting of 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 is as illustrated in FIG.
The downstream end of the tube through which the fuel flows is fitted into the upstream end of the jacket, and the connector is located upstream of the portion where the terminal and the coil terminal are connected. It is a fuel injection valve provided with a resin portion interposed between the terminal and the tube.

By adopting the structure of the fuel injection valve disclosed in claim 1 or 2 of the present application, it is possible to obtain an effect of suppressing variation in the relative positions of the coil terminal and the connector terminal.

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 the relative positions of 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 position variation on the lower end side of the connector terminal can be obtained, which leads 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 product which is a semi-finished product 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 product which is a semi-finished product in a fuel injection valve. It is a figure which shows Embodiment 2 of this application, and is the perspective view which shows the coil terminal and the connector terminal in FIG. 3 with a part in cross-section, and shows the state before assembling the clip part to a jacket. There is. In the figure showing the third embodiment of the present application, another example of the coil terminal and the connector terminal is shown in a cross section, and a state before the clip portion is assembled to the 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, modes for carrying out the technique disclosed in the present application will be described with reference to the drawings.
Embodiment 1.
The fuel injection valve of the first embodiment will be described with reference to FIGS. 1 and 2.
1 and 2 show coil 1, bobbin 2, core 3, housing 4, coil terminal 5, cover 6, spring 7, amateur 8, solenoid device 9, rod 10, pipe 11, seat surface 12, ball 14, ball 14, Valve seat 15, plate 16, valve body 17, jacket 18, flange 181, connector terminal 19, terminal 191, clip 192, tube 20, connector 21, resin jacket 22, first resin injection gate 22img1 , The second resin injection gate 22img2, and the injection fuel flow FFA are illustrated as illustrated.

Hereinafter, the supply side of fuel injection fuel will be referred to as "upstream side", and the side to be supplied will be referred to as "downstream side".
The coil 1 is cylindrically wound around a bobbin 2 made of a cylindrical insulating resin.
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 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 through the opening of the large diameter portion on the upstream side of the housing 4, and is housed 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 inner wall on the upstream side of the cylindrical core 3. The upstream end face of the cylindrical rod 10 is located downstream of the upstream flange 181 of the jacket 18.

A cylindrical amateur 8 is located downstream of the cylindrical core 3 and is movably disposed in the jacket 18 in the direction of the injected fuel flow FFA.
A spring 7, which is 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 always acts on the downstream side of the amateur 8.

The coil terminal 5 of the coil 1 extends to the outside of 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 coil 1, bobbin 2, core 3, housing 4, coil terminal 5, and cover 6. In addition, the valve body 17 is composed of an amateur 8, a pipe 11, and a ball 14.

The outer peripheral surface of the downstream end of the cylindrical tube 20 into which fuel is injected from the upstream side is closely fitted to the inner peripheral surface of the upstream end of the jacket 18. Due to this fitting, the outer circumference of the jacket 18 is sandwiched by its own elastic force at the 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 penetrates the resin-made planar C-shaped clip portion 192 in the vertical direction in the drawing. The clip portion 192 and the connector terminal 19 are integrally molded by a resin mold.

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

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 figure, 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 each other on the downstream side of the clip portion 192. Part 23 is located respectively.

The upstream end of the circular tubular pipe 11 is press-fitted and fixed to the downstream end of the cylindrical amateur 8, and the ball 14 is integrally attached to the downstream end.
The plate 16 is located downstream of the ball 14 and is attached to the inner circumference 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 circumference 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 to 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, amateur 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 coaxially.

The operating 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 amateur 8 is attached with the spring 7. When the ball 14 is separated from the valve seat 15 and the valve is opened by being attracted to the core 3 against the force, the fuel supplied to the upstream side of the tube 20 is inside the tube 20 as shown by the fuel flow FFA. Through the fuel injection hole of the plate 16, through the rod 10, the spring 7, the amateur 8, the pipe 11, the conical space between the ball 14 and the valve seat 15, the engine intake passage ( It is injected into (not shown). Note that FIG. 1 illustrates a state in which the valve is fully closed.

When the control current is not flowing through the coil 1, the amateur 8 moves downstream due to the urging force of the spring 7, the ball 14 also moves downstream via the pipe 11, and the ball 14 presses against the valve seat 15. , Fuel injection is not performed from the fuel injection hole of the plate 16.

Therefore, due to the flow of the control current to the coil 1, the fuel is transferred to the fuel injection hole of the plate 16 by the vertical movement in the figure of the ball 14 through the pipe 11 accompanying the vertical movement in the figure of the amateur 8 (illustration). It is injected from (omitted) to 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. The inserts in Fig. 2 are coil 1, bobbin 2, core 3, housing 4, coil terminal 5, cover 6, spring 7, amateur 8, rod 10, pipe 11, seat surface 12, ball 14, valve seat 15, plate. 16, the valve body 17, the jacket 18, the flange portion 181, the connector terminal 19, the terminal portion 191 and the clip portion 192 are configured as shown in the figure. The representative reference code of the insert product is 13.

The semi-finished product in which the upstream end of the jacket 18 and the downstream end of the cylindrical tube 20 in the insert 13 of the fuel injection valve illustrated in FIG. 2 are fitted in the above-mentioned state is resin-injected. It is installed in the casting mold, and resin is injected into the mold from the first resin injection gate 22img1 and the second resin injection gate 22img2 to form the connector portion 21 and the resin outer cover 22. As shown, the first resin injection gate 22img1 is located on the side generally 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. Then, it is located on the same side as the first resin injection gate 22img1 (the side opposite to the connector portion 21).

The fuel injection valve covers the resin bobbin 2 around which the coil 1 is wound, the metal core 3, the two-stage cylindrical housing 4, and the bobbin 2 in a lid shape, and is welded to a part of the outer circumference of the housing 4. A solenoid device 9 consisting of a metal cover 6 having a notch that is fixed and serves as an outlet for the coil terminal 5 of the electrode, and a valve mechanism by the magnetic attraction force generated by the magnetic field generated in the solenoid device 9 and the pressing of the spring 7. It comprises a valve device having a movable valve body 17.
Further, in the fuel injection valve, 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, so that the valve mechanism portion (ball 14, valve seat 15, plate) 16) The valve closed state is maintained.

The valve device of the fuel injection valve is in contact with the conical seat surface 12 whose diameter decreases toward the downstream side, the valve seat 15 having a cylindrical opening on the downstream side of the seat surface 12, and the seat surface 12. A plate 16 having a fuel injection injection hole fixed to the downstream end surface of the ball 14 and the valve seat 15 which are separated from the seat surface 12 and allow the fuel to flow out from the opening while preventing the outflow of fuel from the opening. , Amateur 8 which is attracted and displaced toward the core 3 side in the direction away from the valve seat 15 by electromagnetic force, pipe 11 connecting the amateur 8 and the ball 14, the valve body 17 consisting of the amateur 8, the pipe 11, and the ball 14, the core 3, the amateur It consists of a valve body 17 including 8, and a jacket 18 that houses the valve seat 15, and the bobbin 2 is held by the jacket 18 at the inner diameter portion.

Further, the jacket 18 is partially attached to a resin clip portion 192 that has a terminal portion 191 for connecting to an external terminal on the one hand and a coil terminal 5 on the other hand and is integrally molded with the terminal portion 191. The first embodiment includes a connector terminal 19 that holds itself by surrounding it.

Since the bobbin 2 in which the coil 1 is wound and the coil terminal 5 extends to the outside and the connector terminal 19 both hold the jacket 18, it is assembled in the case of holding another part as in the conventional example. It is possible to suppress the relative positional variation between the terminals at the time. This makes it possible to omit the step of correcting the positions of the terminals with a jig, which leads to an improvement in productivity.

Further, for joining the coil terminal 5 and the terminal portion 191, for example, a method by soldering is assumed. In this case, the way of soldering changes depending on the amount of the gap between the coil terminal 5 and the terminal portion 191. The control of the amount of gap is greatly related to the stability of the joint state. By adopting the shape and structure of the present embodiment, since the terminals are held at a position closer to the joint position between the terminals than in the conventional example, the variation in the amount of the gap between the coil terminal 5 and the terminal portion 191 is suppressed. Therefore, the effect of making the solder joint more stable can be obtained.

In the first embodiment, as described above, the control current to the coil 1 is controlled to control the amount of fuel injected from the valve body 17 to the outside through the inside of the jacket 18. In the fuel injection valve, the terminal portion 191 of the connector terminal 19 that integrally has the clip portion 192 that sandwiches the outer periphery of the predetermined portion on the upstream side of the jacket 18 and supplies the control current to the coil 1 from the outside, and the terminal portion 191. A fuel injection valve in which the coil terminal 5 of the 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 are located. A fuel injection valve whose portion connected to the terminal 5 is located upstream of the coil 1 is disclosed.

Further, in the first embodiment, as described above, a valve seat 15 having a conical seat surface whose diameter decreases toward the downstream, and a valve that is attracted and displaced in a direction away from the valve seat 15 by an electromagnetic force. Body 17, amateur 8 that is a part of valve body 17 and serves as a suction part, spring 7 that applies force in the direction to close the valve body 17, core 3 that faces amateur 8 and becomes a fixed iron core, valve seat 15 and valve body A jacket 18 that houses 17 and the core 3, a resin bobbin 2 arranged on the outer peripheral side of the core 3, a coil 1 wound around the bobbin 2, and a coil terminal 5 conductively connected to the coil wire of the coil 1. The valve body 17 is formed by contacting and energizing an external terminal on the one hand and electrically connected to the coil terminal 5 on the other hand, and operating the valve body 17 by receiving an operation signal from a control device. In an electromagnetic fuel injection valve for an internal combustion engine that is magnetically attracted to the core 3 side against the force of a spring 7 and is separated from and detached from the valve seat 15 to form a valve mechanism, the bobbin 2 is attached to the jacket 18 at the inner diameter portion. A fuel injection valve is disclosed in which the connector terminal 19 is press-fitted and supported, and the connector terminal 19 has a resin clip portion 192 that is supported by partially surrounding and contacting the outer periphery of the jacket 18. ..

Embodiment 2.
A cross-sectional view of the insert product of the fuel injection valve according to the second embodiment shown in FIG. 3 will be described. Note that FIG. 4 is an enlarged explanatory view of a main part of FIG.
A recess 193 having a surface 193A parallel to the coil terminal 5 is provided in the resin clip portion 192 of the connector terminal 19 of the fuel injection valve according to the second embodiment. The surface 193A of the recess 193 is configured to be in contact with the coil terminal 5 when attached in an elastically sandwiched state. Since the clip portion 192 having the connector terminal 19 integrally is assembled to the jacket 18 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. Therefore, the positional variation between the terminal portion 191 and the coil terminal 5 is further suppressed.
When the coil terminal 5 and the terminal portion 191 are joined by soldering, it becomes easier to control the amount of the gap between the coil terminal 5 and the terminal portion 191 and the joining between the coil terminal 5 and the terminal portion 191 is more stable. The effect of soldering is obtained.

In the second embodiment, as described above, a recess 193 is formed in the portion of the clip portion 192 corresponding to the coil terminal 5, and the recess 193 connects the terminal portion 191 and the coil terminal 5. 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, so that the relative position of the connector terminal 19 and the coil terminal 5 in the recess is determined. The specified fuel injection valve is disclosed.

Embodiment 3.
This will be described with reference to an enlarged explanatory view of a main part of the insert product of the fuel injection valve according to 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 and 194, and the coil terminal 5 corresponds to the convex portions 194 and 194. Holes 51 and 51 are provided, and in the connector terminal 19, the convex portions 194 and 194 are fitted into the holes 51 and 51, and the clip portion 192 is assembled to the jacket 18 in the fitted state with the coil terminal 5. , The radial position of the connector terminal 19 is directly defined with respect to the coil terminal 5, and the variation in the interphase position between the terminal portion 191 and the coil terminal 5 is further suppressed. When the coil terminal 5 and the terminal portion 191 are joined by solder, it becomes easier to control the amount of the gap between the coil terminal 5 and the terminal portion 191 and the connection between the coil terminal 5 and the terminal portion 191 becomes easier. A stable effect can be obtained.
Even if the convex portions 194 and 194 are provided on the side of the coil terminal 5 and the holes 51 and 51 that fit into the convex portions 194 and 194 are provided on the side of the clip portion 192, the same effect can be obtained.

In the third embodiment, as described above, one of the clip portion 192 and the coil terminal 5 is provided with a convex portion 194, and the other is provided with a concave portion 193. A fuel injection valve in which the relative positions of the terminal portion 191 and the coil terminal 5 are determined by fitting with the concave portion 193 is disclosed, and the clip portion 192 is provided with the convex portion 194 to provide the coil terminal. Hole 51 is provided in 5, and the connector terminal 19 discloses a fuel injection valve in which the relative position with respect to the coil terminal 5 is defined by the fitting of the convex portion 194 and the hole 51.

Embodiment 4.
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, and the tube 20 has a fuel passage like the jacket 18. Is forming.
Further, a resin portion 195 made of resin that protrudes in the radial direction to a position substantially along the tube 20 is provided between the portion extending in the axial direction of the fuel injection valve and the tube 20 on the upstream side of the clip portion 192 of the connector terminal 19. It is provided.
By setting the axial length L1 of the fuel injection valve of the resin portion 195 to 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, the connector terminal 19 becomes fuel. The outer circumference of the tube 20 supports the inclination of the injection valve with respect to the axial direction, and the effect of suppressing the position variation on the lower end side of the connector terminal 19 is obtained, and the relative position variation between the coil terminal 5 and the terminal portion 191 is obtained. It leads to suppression.

Here, when molding the connector part 21 (male side) for connecting to an external power supply, drive circuit, etc. by injecting resin into the resin injection casting mold, the tube 20 including the solder part and the housing It is formed so as to cover a part of 4 with a resin outer cover 22.
At that time, the positions of the first resin injection gate 22img1 and the second resin injection gate 22img2 are arranged at two locations on the opposite side 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. It is in the vicinity of 4, and the resin part (resin part 195, clip part 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 the direction of pushing down to the downstream side by the resin from the first resin injection gate 22img1 on the upstream side, and the lower surface of the clip portion 192 is from the second resin injection gate 22img2 on the downstream side. A force F2 in the direction of pushing up to the upstream side is applied by the resin. The force applied to the resin portion 195 and the clip portion 192 receives a force from either the upstream side or the downstream side depending on the progress of molding, and therefore the terminal joint portion 23 receives a force in the direction in which the joints are separated.

Therefore, as in the shape of the embodiment of the present application, the resin portion 195 and the clip portion 192 sandwich the flange portion 181 of the jacket 18, 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 a force that pushes down the upper surface of the resin portion 195 to the downstream side and a force that pushes up the lower surface of the clip portion 192 to the upstream side are applied, the force applied to the joint portion is alleviated by the support of the flange portion 181 of the jacket 18, and the joint is joined. The effect of improving the reliability of the part can be obtained.
Further, by providing the resin portion 195, the inflow of the resin into the resin portion 195 is suppressed, and the force F3 on the outer diameter side received by the connector terminal 19 due to the resin flow during molding can be suppressed, and the same as above. The force applied to the joint portion 23 is suppressed, and the reliability of the joint portion 23 is improved. Further, since the force on the outer diameter side is suppressed, the effect of preventing the connector terminal 19 from being exposed to the outside can be obtained.

Similar to the second embodiment, when the coil terminal 5 and the terminal portion 191 are joined by soldering, it becomes easier to control the amount of the gap between the coil terminal 5 and the terminal portion 191 and the coil terminal 5 and the terminal portion 191 are joined. The effect of making the joint with the portion 191 more stable can be obtained.

As illustrated in FIG. 6, the fourth embodiment discloses the following technical features.
That is, the downstream end of the tube 20, which is a hollow extension pipe through which fuel flows, is fitted into the upstream end of the jacket 18.
A resin portion 195 is provided located upstream from the portion where the terminal portion 191 and the coil terminal 5 are connected and interposed between the connector terminal 19 and the tube 20. The resin portion 195 is integrated with the connector terminal 19. A resin portion 195 is integrally provided in a straight line portion of the connector terminal 19 extending parallel to the axis of the fuel injection valve, and the resin portion 195 extends parallel to the axis of the fuel injection valve. At the same time, it has a structure that protrudes toward the tube 20 in the radial direction from the straight portion of the connector terminal 19. Further, the resin portion 195 and the clip portion 192 having such a structure are integrally formed by molding.
Further, a flange portion 181 is provided at the upstream end of the jacket 18, and the flange portion 181 and at least one of the clip portion 192 and the resin portion 195 are brought into contact with each other in the upstream direction of the clip portion 192 and the resin portion 195. The position in the downstream direction is fixed. As illustrated in FIG. 6, the integrated 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. It is preferable to have a structure in which a part of the outer periphery of the flange portion 181 is fitted in the groove.

In FIGS. 1 to 6 and 6, a gap is provided between the coil terminal 5 and the terminal portion 191 on the assumption that the coil terminal 5 and the terminal portion 191 are joined by solder. The method of joining between the solders, the presence or absence of a gap, and the like are not limited to this.

In each figure, the same sign indicates the same or corresponding part.
Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are specific embodiments. It is not limited to the application of, but can be applied to the embodiment alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed in the present application. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

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 valve body, 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 1st resin injection gate, 22img2 2nd resin injection gate, 23 Terminal junction, FFA injection fuel flow.

Claims (10)

In a fuel injection valve in which the amount of fuel injected from the valve body to the outside flows through the inside of the jacket by controlling the control current to the coil.
The terminal portion of the connector terminal that integrally has a clip portion that sandwiches the outer periphery of the predetermined portion on the upstream side of the jacket and the control current to the coil is supplied from the outside, and the coil terminal of the coil are electrically and mechanical. A fuel injection valve characterized by being connected in a positive manner. In a fuel injection valve in which the amount of fuel injected from the valve body to the outside flows through the inside of the jacket 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 circumference 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.
A fuel injection valve characterized in that 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 the bobbin around which the coil is wound and the coil terminal extends to the outside is held by the jacket. Claims 1 to 1, wherein the clip portion is located on the upstream side of the coil, and a portion connecting the terminal portion and the coil terminal is located on the upstream side of the coil. The fuel injection valve according to any one of 3. Any of claims 1 to 3, wherein a recess 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 recess. The fuel injection valve according to paragraph 1. A convex portion is provided on either one of the clip portion and the coil terminal, and a concave portion is provided on the other.
The fuel injection valve according to any one of claims 1 to 5, wherein the relative position between the terminal portion and the coil terminal is determined by the fitting of the convex portion and the concave portion. .. The downstream end of the tube through which the fuel flows is fitted into the upstream end of the jacket.
Claims 1 to 1, wherein a resin portion is provided located upstream of the portion where the terminal portion and the coil terminal are connected and is interposed between the connector terminal and the tube. The fuel injection valve according to any one of 6. The fuel injection valve according to claim 7, wherein the clip portion and the resin portion are integrated. A flange portion is provided at the upstream end of the jacket.
The fuel injection valve according to claim 8, wherein the positions of the clip portion and the resin portion in the upstream direction and the downstream direction are determined by the flange portion. The ninth aspect of the present invention is characterized in that the upstream and downstream positions of the clip portion and the resin portion are fixed, so that the upstream and downstream positions of the terminal portion of the connector terminal are fixed. The fuel injection valve described.

Images