CN112135966A - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
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- CN112135966A CN112135966A CN201880093570.6A CN201880093570A CN112135966A CN 112135966 A CN112135966 A CN 112135966A CN 201880093570 A CN201880093570 A CN 201880093570A CN 112135966 A CN112135966 A CN 112135966A
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- terminal
- coil
- fuel injection
- sleeve
- injection valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A fuel injection valve controls the amount of fuel that flows inside a sleeve (18) and is injected from a valve core (17) to the outside by controlling the control current flowing in the coil (1), wherein a connector terminal (19) to which the control current flowing in the coil (1) is supplied from the outside has a clamping portion (192) on the upstream side of a terminal portion (191) of the connector terminal, the clamping portion (192) clamps a part of the outer periphery of the upstream side of the sleeve (18), the connector terminal (19) holds the sleeve (18) via the clamping portion (192), and the terminal portion (191) of the connector terminal (19) is electrically and mechanically connected to a coil terminal (5) of the coil (1), thereby suppressing a deviation in the relative positions of the connector terminal (19) and the coil terminal (5).
Description
Technical Field
The present invention relates to a fuel injection valve for supplying fuel to an internal combustion engine of an automobile or the like.
Background
Conventionally, a fuel injection valve used in an internal combustion engine includes: an electromagnetic coil; an armature as a part of the core and the valve body whose end surfaces face each other with a certain interval maintained therebetween when the electromagnetic coil is not energized; and a spring that is compressed by a rod fixed inside the core and biases the valve body in a valve closing direction. When the electromagnetic coil is energized, the armature is magnetically attracted to the core portion side against the force of the spring, and along with this, the valve core moves toward the core portion side to bring the armature into contact with the core portion to open the valve, thereby injecting the fuel. (open valve state)
When the energization of the electromagnetic coil is completed, the armature returns in the valve closing direction together with the valve element by the force of the spring, and the tip end portion of the valve element comes into contact with the seat portion to seal the fuel. (valve closed state)
As for the structure of the fuel injection valve, various methods are known based on known techniques, and in the structure shown in patent document 1 (japanese patent application laid-open No. 2004) -518849), a sleeve as a hollow conduit is present on the inner diameter side of a bobbin around which a coil is wound, and a valve element, a valve seat, and the like including the core portion, the armature, and the like are housed in the sleeve. The connector terminal includes a terminal portion for connecting to an external terminal on one side and a coil terminal on the other side, and a resin-made clamping portion that is firmly clamped to a tube that is a hollow extension duct press-fitted into an upstream-side end surface of the sleeve.
The connector-side terminal and the coil terminal face each other in parallel and are electrically connected to each other by an appropriate technique such as welding, soldering, bonding, fastening, or insertion bonding.
Patent document 1: japanese patent laid-open publication No. 2004-518849
Disclosure of Invention
Technical problem to be solved by the invention
In the shape described in patent document 1, the sleeve is inserted into the bobbin in which the coil terminal is integrally molded.
The connector terminal is supported by the extension duct by the resin clip portion integrally molded with the connector terminal embracing the outer periphery of the extension duct at a position axially apart from the coil.
Since the parts supporting the connector terminal and the coil terminal are different from each other and the portions supporting the connector terminal and the coil terminal are separated from each other, a positional deviation between the connector terminal and the coil terminal is increased, and a step of correcting the positional deviation by a jig or the like is required when joining the connector terminal and the coil terminal.
The present application discloses a technique for solving the above-described problem, and an object thereof is to suppress a deviation in relative positions of a coil terminal and a connector terminal.
Technical scheme for solving technical problem
Technical solution 1 of the present application discloses a fuel injection valve in which, as illustrated in fig. 1, the amount of fuel injected from a core to the outside through the inside of a sleeve is controlled by controlling a control current flowing through a coil, and terminal portions of connector terminals are electrically and mechanically connected to coil terminals of the coil, wherein the connector terminals integrally have a clamping portion that clamps the outer periphery of a predetermined portion on the upstream side of the sleeve and are supplied with the control current flowing through the coil from the outside, and technical solution 2 of the present application discloses a fuel injection valve in which, as illustrated in fig. 1, the amount of fuel injected from the core to the outside through the inside of the sleeve is controlled by controlling a control current flowing through the coil, and a connector terminal to which the control current flowing through the coil is supplied from the outside has a clamping portion on the upstream side of its terminal portion, the clip portion clips a part of an outer periphery of the upstream side of the sleeve, the connector terminal holds the sleeve via the clip portion, and the terminal portion of the connector terminal is electrically and mechanically connected to the coil terminal of the coil.
In claim 7 of the present application, as illustrated in fig. 6, a downstream end of a pipe is fitted into an upstream end of the sleeve, the fuel flows inside the pipe, and a resin portion is provided upstream of a portion where the terminal portion is connected to the coil terminal, the resin portion being sandwiched between the connector terminal and the pipe.
Effects of the invention
By adopting the configuration of the fuel injection valve disclosed in claim 1 or claim 2 of the present application, an effect of suppressing the deviation of the relative positions of 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, it is possible to contribute to further suppressing the deviation of the relative positions of the coil terminal and the connector terminal.
By adopting the configuration of the fuel injection valve disclosed in claim 7 of the present application, an effect of suppressing positional deviation on the lower end side of the connector terminal can be obtained, which contributes to suppressing positional deviation between the coil terminal and the connector terminal.
Drawings
Fig. 1 is a diagram showing embodiment 1 of the present application, and is a cross-sectional view showing an example of a fuel injection valve.
Fig. 2 is a view showing embodiment 1 of the present application, and is a cross-sectional view of an insert that is a semi-finished product in the fuel injection valve illustrated in fig. 1.
Fig. 3 is a view showing embodiment 2 of the present application, and is a cross-sectional view showing another example of an insert that is a semi-finished product in a fuel injection valve.
Fig. 4 is a perspective view showing embodiment 2 of the present application, which is an enlarged view showing a part of the coil terminal and the connector terminal in fig. 3 in cross section, and illustrates a state before the clip portion is attached to the sleeve.
Fig. 5 is a perspective view showing another example of the coil terminal and the connector terminal, partially in cross section, illustrating a state before the clip portion is attached to the sleeve according to embodiment 3 of the present application.
Fig. 6 is a view showing embodiment 4 of the present application, which is a cross-sectional view showing another example of a fuel injection valve.
Detailed Description
Hereinafter, a mode for carrying out the technology disclosed in the present application will be described with reference to the drawings.
Embodiment mode 1
A fuel injection valve according to embodiment 1 illustrated in fig. 1 and 2 will be described.
As shown in fig. 1 and 2, a coil 1, a bobbin 2, a core 3, a housing 4, a coil terminal 5, a cover 6, a spring 7, an armature 8, a solenoid device 9, a rod 10, a guide tube 11, a seat surface 12, a spherical body 14, a valve seat 15, a plate member 16, a valve body 17, a sleeve 18, a flange portion 181, a connector terminal 19, a terminal portion 191, a clamping portion 192, a tube 20, a connector portion 21, a resin-made outer skin 22, a first resin injection gate 22img1, a second resin injection gate 22img2, and an injection fuel flow FFA are exemplified.
Hereinafter, the supply side of the fuel injection fuel is denoted as "upstream side", and the side to be supplied is denoted as "downstream side".
The coil 1 is wound in a cylindrical shape around a cylindrical bobbin 2 made of insulating resin.
The cylindrical core 3 is fitted and welded to a position corresponding to the coil 11 on the inner peripheral wall of the cylindrical sleeve 18.
A double-cylindrical outer shell 4 is fitted and welded to the outer periphery of the sleeve 18.
The bobbin 2 around which the coil 1 is wound is inserted from an opening of the large-diameter portion on the upstream side of the case 4 and is accommodated in the large-diameter portion on the upstream side of the case 4. An opening on the upstream side of the case 4, which houses the bobbin 2 around which the coil 1 is wound, 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 181 of the sleeve 18.
The cylindrical armature 8 is located on the downstream side of the cylindrical core 3 and is arranged to be movable in the sleeve 18 in the direction of the injection fuel flow FFA.
A spring 7 as a compression spring is inserted between the armature 8 and the rod 10. Since the rod 10 is fixed to the sleeve 18 via the core 3, the biasing force of the spring 7 always acts on the armature 8 toward the downstream side.
The coil terminal 5 of the coil 1 extends to the outside of the bobbin 2 through a cutout provided in a part of the cover 6. The coil terminal 5 extends along the outer wall surface of the sleeve 18 in parallel with the direction of the injection fuel flow FFA.
The solenoid device 9 is constituted by the coil 1, the bobbin 2, the core 3, the case 4, the coil terminal 5, and the cover 6. Further, the armature 8, the pipe 11, and the ball 14 constitute a valve body 17.
The outer peripheral surface of the downstream end of the cylindrical pipe 20 into which fuel is injected from the upstream side is fitted in close contact with the inner peripheral surface of the upstream end of the sleeve 18. By this fitting, the connector terminal 19 penetrates through a resin-made clamping portion 192 having a C-shaped planar shape in the vertical direction in the drawing in a portion where the downstream end of the tube 20 and the upstream end of the sleeve 18 form a radial double-tube structure, and the clamping portion 192 clamps the outer periphery of the sleeve 18 by its own elastic force. The clip portion 192 and the connector terminal 19 are integrally molded by resin molding.
The downstream end of the connector terminal 19 protrudes downstream of the clamp 192, and extends along the outer wall surface of the sleeve 18 in parallel to the direction of the injection fuel flow FFA. The downstream end of the connector terminal 19, which protrudes further downstream than the clip 192 and extends in parallel to the direction of the fuel injection flow FFA along the outer wall surface of the sleeve 18, is located radially outward of the sleeve 18 with respect to the coil terminal 5, which extends in parallel to the direction of the fuel injection flow FFA along the outer wall surface of the sleeve 18. When viewed from the radial direction of the sleeve 18, the terminal portion 191 on the downstream side of the connector terminal 19 and the coil terminal 5 form a double-layer structure in the radial direction, and the downstream side end of the connector terminal 19 and the coil terminal 5 are joined by joining means such as soldering or brazing in this double-layer structure.
The clip portion 192 is located between the flange portion 181 of the sleeve 18 and the coil terminal 5 when viewed from the extending direction of the sleeve 18. In other words, in the drawing, the clamping portion 192 is located between the flange portion 181 of the sleeve 18 and the coil terminal 5. In other words, the flange portion 181 is located adjacent to the upstream side of the clamping portion 192, and the coil terminal 5, the terminal portion 191, and the joint portion 23 of the coil terminal 5 and the terminal portion 191 are located on the downstream side of the clamping portion 192, respectively.
An upstream end of the circular pipe-shaped conduit 11 is press-fitted and fixed to a downstream end of the cylindrical armature 8, and a ball 14 is integrally attached to the downstream end of the circular pipe-shaped conduit 11.
An annular valve seat 15 is located between the conduit 11 and the plate member 16 and is fitted and fixed to the inner periphery of the sleeve 18. The inner circumferential seat surface 12 of the annular valve seat 15 is inclined with respect to the center line of the valve seat 15 such that the distance from the center line of the valve seat 15 decreases from the upstream side to the downstream side. Therefore, the space surrounded by the seat surface 12 has a conical trapezoidal shape in which the diameter of the downstream side circle is smaller than the diameter of the upstream side circle.
As shown in fig. 1, the coil 1, the bobbin 2, the core 3, the housing 4, the spring 7, the armature 8, the rod 10, the guide tube 11, the ball 14, the valve seat 15, the plate member 16, the flange portion 181, the clamping portion 192, and the tube 20 are located on the same axis.
The operation principle of the fuel injection valve will be described. When an operation signal is sent from a control device (not shown) of the engine to a drive device (not shown) of the fuel injection valve, a control current flows from the connector terminal 19 to the coil 1 via the coil terminal 5, the armature 8 is attracted to the core 3 against the urging force of the spring 7, and the ball 14 is separated from the valve seat 15 to open the valve, as indicated by a fuel flow FFA, the fuel supplied to the upstream side of the pipe 20 passes through the inside of the pipe 20, passes through the inside of the rod 10, the inside of the spring 7, the inside of the armature 8, the inside of the conduit 11, and a space in the shape of a conical trapezoid between the ball 14 and the valve seat 15, and is injected from a fuel injection hole of the plate member 16 to an engine intake passage (not shown). Fig. 1 illustrates a state in which the valve is fully closed.
In a state where the control current is not supplied to the coil 1, the armature 8 moves downstream by the biasing force of the spring 7, and the ball 14 also moves downstream via the pipe 11, and the ball 14 comes into pressure contact with the valve seat 15, so that fuel injection from the fuel injection hole of the plate member 16 is not possible.
Therefore, by the flow of the control current to the coil 1, the fuel is injected from the fuel injection hole (not shown) of the plate member 16 to the engine intake passage (not shown) by the movement of the ball 14 via the pipe 11 in the up-down direction in the figure accompanying the movement of the armature 8 in the up-down direction in the figure.
Fig. 2 is a cross-sectional view of an insert that is a semi-finished product of the fuel injection valve illustrated in fig. 1. The insertion member of fig. 2 is constituted by the coil 1, the bobbin 2, the core 3, the case 4, the coil terminal 5, the cover 6, the spring 7, the armature 8, the rod 10, the pipe 11, the seat surface 12, the ball 14, the valve seat 15, the plate member 16, the valve body 17, the sleeve 18, the flange portion 181, the connector terminal portion 19, the terminal portion 191, and the clamping portion 192, as shown in the drawing. The insert is denoted by the reference numeral "13".
The semi-finished product in the state in which the end portion on the upstream side of the sleeve 18 and the end portion on the downstream side of the cylindrical pipe 20 in the insert 13 of the fuel injection valve exemplified in fig. 2 are fitted in the state described above is set in the mold of the resin injection 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-made outer skin 22. As shown in the drawing, the first resin injection gate 22img1 is located substantially on the opposite side to the connector portion 21, and the second resin injection gate 22img2 is located on the same side (opposite side to the connector portion 21) as the first resin injection gate 22img1 corresponding to the small-diameter cylindrical portion of the double-walled cylindrical housing 4.
The fuel injection valve is constituted by a solenoid device 9 and a valve device, wherein the solenoid device 9 is constituted by a resin bobbin 2 for winding a coil 1, a metal core 3, a case 4 formed in a double-layer cylindrical shape, and a metal cover 6, the cover 6 covers the bobbin 2 in a cover shape, is welded and fixed to a part of the outer periphery of the case 4, and has a notch portion for an outlet of a coil terminal 5 as an electrode, and the valve device has a movable valve element 17, and the movable valve element 17 constitutes a valve mechanism by a magnetic attraction force due to a magnetic field generated by the solenoid device 9 and a pressing force of a spring 7.
Further, the fuel injection valve maintains the valve mechanism portion (the ball 14, the valve seat 15, and the plate member 16) in a closed state by the spring 7 in a compressed state by the rod 10 fixed inside the core 3 applying a load to the valve body 17 in the downstream direction.
A valve device of a fuel injection valve is composed of a conical seat surface 12, a valve seat 15, a ball 14, a plate member 16, an armature 8, a valve body 17, and a sleeve 18, the seat surface 12 is reduced in diameter toward the downstream side, the valve seat 15 has a cylindrical opening portion on the downstream side of the seat surface 12, the ball 14 abuts against the seat surface 12 to prevent the fuel from flowing out through the opening portion, and is separated from the seat face 12 to allow the fuel to flow out from the opening portion, the plate member 16 is fixed to the downstream end face of the valve seat 15 and has a fuel injection nozzle hole, the armature 8 is attracted toward the core 3 side by electromagnetic force, and is displaced away from the valve seat 15, said valve element 17 being constituted by the duct 11 connecting the armature 8 and the ball 14, the armature 8, the duct 11 and the ball 14, the sleeve 18 houses the core 3, the valve body 17 including the armature 8, and the valve seat 15, and the bobbin 2 is held by the sleeve 18 at an inner diameter portion.
Further, embodiment 1 includes a connector terminal 19, and the connector terminal 19 has a terminal portion 191 for connecting to an external terminal on one side and to the coil terminal 5 on the other side, and holds itself by partially surrounding the sleeve portion 18 at a resin-made sandwiching portion 192 integrally molded with the terminal portion 191.
Since the bobbin 2 around which the coil 1 is wound and the coil terminal 5 extends outward holds the sleeve 18 together with the connector terminal 19, it is possible to suppress the relative positional deviation between the terminals at the time of assembly, as compared with the case of holding different parts as in the conventional example. This can omit a step of correcting the positions of the terminals by a jig, and contributes to improvement of productivity.
In addition, in order to join the coil terminal 5 and the terminal portion 191, for example, a soldering method is assumed, and in this case, a rotating method of the solder changes depending on the amount of gap between the coil terminal 5 and the terminal portion 191, and management of the amount of gap is greatly related to stability of the joined state. By adopting the shape and structure of the present embodiment, since the terminal is held at a position closer to the joint position of the terminals than in the conventional example, variation in the amount of gap between the coil terminal 5 and the terminal portion 191 is suppressed, and an effect of stabilizing the solder joint portion can be obtained.
In embodiment 1, as described above, by controlling the control current flowing through the coil 1, as a fuel injection valve that controls the amount of fuel that flows inside the sleeve 18 and is injected from the valve element 17 to the outside, there is disclosed a fuel injection valve, namely, a fuel injection valve in which a terminal portion 191 of a connector terminal 19 is electrically and mechanically connected to a coil terminal 5 of the coil 1, wherein the connector terminal 19 integrally has a clamping portion 192 for clamping the outer periphery of a predetermined portion on the upstream side of the sleeve 18, and a control current flowing to the coil 1 is supplied from the outside, and a fuel injection valve as described below is disclosed, that is, the sandwiching portion 192 is located on the upstream side of the coil 1, and the portion where the terminal portion 191 is connected to the coil terminal 5 is located on the upstream side of the coil 1.
Further, in embodiment 1, as described above, there is disclosed a fuel injection valve for an electromagnetic fuel injection valve for an internal combustion engine, which is configured by a valve seat 15, a valve body 17, an armature 8, a spring 7, a core portion 3, a sleeve 18, a resin bobbin 2, a coil 1, a coil terminal 5, and a connector terminal 19, wherein the valve seat 15 has a conical seat surface whose diameter decreases toward the downstream, the valve body 17 is attracted by an electromagnetic force and displaced in a direction away from the valve seat 15, the armature 8 is a part of the valve body 17 and serves as an attraction portion, the spring 7 biases the valve body 17 in a direction of closing the valve body 17, the core portion 3 faces the armature 8 and serves as a fixed core, the sleeve 18 houses the valve seat 15, the valve body 17, and the core portion 3 therein, and the bobbin 2 is disposed on an outer peripheral side of the core portion 3, the coil 1 is wound around the bobbin 2, the coil terminal 5 is electrically connected to a coil wire of the coil 1, the connector terminal 19 is electrically connected to the coil terminal 5 while being in contact with an external terminal, and the valve element 17 is operated by receiving an operation signal from a control device, so that the valve element 17 is magnetically attracted toward the core portion 3 against the force of the spring 7, and the valve element is brought into contact with and separated from the valve seat 15 to constitute a valve mechanism, in the electromagnetic fuel injection valve for an internal combustion engine, the bobbin 2 is press-fitted into an inner diameter portion and supported by the sleeve 18, the connector terminal 19 has a resin-made clamping portion 192, and the clamping portion 192 is supported by partially surrounding an outer periphery of the sleeve 18 and being in contact therewith.
A cross-sectional view of an insert for a fuel injection valve according to embodiment 2 shown in fig. 3 will be described. Fig. 4 is an enlarged explanatory view of a main part of fig. 3.
The resin clip 192 of the connector terminal 19 of the fuel injection valve according to embodiment 2 is provided with a concave portion 193 having a surface 193A parallel to the coil terminal 5, and the surface 193A of the concave portion 193 is configured to be in contact with the coil terminal 5 in a state where the clip 192 is attached to the sleeve 18 in a state where the sleeve 18 is elastically clipped. Since the clip portion 192 integrally having the connector terminal 19 is assembled to the sleeve 18 in a state where the coil terminal 5 is in contact with the surface 193A of the concave portion 193, the radial position of the connector terminal 19 is directly defined with respect to the coil terminal 5, and positional deviation 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, the amount of the gap between the coil terminal 5 and the terminal portion 191 is more easily managed, and an effect that the joint between the coil terminal 5 and the terminal portion 191 is more stable can be obtained.
As described above, in embodiment 2, there is disclosed a fuel injection valve in which a concave portion 193 is formed in a portion of the clip portion 192 corresponding to the coil terminal 5, and a relative position between the terminal portion 191 and the coil terminal 5 is determined by the concave portion 193, and in which the clip portion 192 is provided with the concave portion 193 parallel to the coil terminal 5, and a relative position between the connector terminal 19 and the coil terminal 5 is determined by the concave portion.
An enlarged explanatory view of a main part of an insert for a fuel injection valve according to embodiment 3 shown in fig. 5 will be described. In the fuel injection valve of embodiment 3, the resin clip portion 192 of the connector terminal 19 is provided with two protruding portions 194 and 194, the coil terminal 5 is provided with the holes 51 and 51 corresponding to the protruding portions 194 and 194, and the clip portion 192 is assembled to the sleeve 18 in a state where the protruding portions 194 and 194 are fitted into the holes 51 and the coil terminal 5 is fitted to the connector terminal 19, so that the radial position of the connection terminal 19 is directly defined with respect to the coil terminal 5, and the positional deviation 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, the amount of the gap between the coil terminal 5 and the terminal portion 191 is more easily managed, and an effect that the joint between the coil terminal 5 and the terminal portion 191 is more stable can be obtained.
Even if the projections 194 and 194 are provided on the coil terminal 5 side and the holes 51 and 51 fitted to the projections 194 and 194 are provided on the clamping portion 192 side, the same effect can be obtained.
As described above, in embodiment 3, there is disclosed a fuel injection valve in which the protruding portion 194 is provided on one of the sandwiching portion 192 and the coil terminal 5, the recessed portion 193 is provided on the other, and the relative position between the terminal portion 191 and the coil terminal 5 is determined by fitting the protruding portion 194 and the recessed portion 193, and there is also disclosed a fuel injection valve in which the protruding portion 194 is provided on the sandwiching portion 192, the hole 51 is provided in the coil terminal 5, and the relative position between the connector terminal 19 and the coil terminal 5 is determined by fitting the protruding portion 194 and the hole 51.
Embodiment 4
A cross-sectional view of the fuel injection valve according to embodiment 4 shown in fig. 6 will be described. A flange 181 is formed on the upstream end surface of the sleeve 18, and a tube 20 as a hollow extension pipe is press-fitted into the upstream end surface of the sleeve 18, and the tube 20 forms a fuel passage in the same manner as the sleeve 18.
Further, a resin portion 195 made of resin is provided between a portion of the connector terminal 19 that is located upstream of the clamping portion 192 and extends in the axial direction of the fuel injection valve and the pipe 20, and the resin portion 195 protrudes in the radial direction to a position substantially along the pipe 20.
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 of the connector terminal 19 extending in the axial direction of the fuel injection valve, the outer periphery of the tube 20 supports the connector terminal 19 to overcome the inclination of the connector terminal 19 with respect to the axial direction of the fuel injection valve, and an effect of suppressing the positional deviation of the lower end side of the connector terminal 19 can be obtained, contributing to the suppression of the relative positional deviation between the coil terminal 5 and the terminal portion 191.
Here, when a connection portion 21 (male side) for connection to an external power supply, a drive circuit, and the like is molded by injecting resin into a mold of a resin injection mold, a part of the tube 20 including the solder portion and the housing 4 is covered with a resin outer skin 22.
At this time, the positions of the first resin injection gate 22img1 and the second resin injection gate 22img2 are arranged at two positions on the opposite side of the connector portion 21, the positions in the axial direction are located near the connector portion 21 on the upstream side and near the housing 4 on the downstream side, respectively, and the resin portions (the resin portion 195 and the sandwiching portion 192) of the connector terminal 19 are influenced by the resin flows from the two gates.
That is, the upper surface of the resin part 195 receives a force F1 in a direction of being pressed down toward the downstream side by the resin from the first resin injection gate 22img1 on the upstream side, and the lower surface of the clamp part 192 receives a force F2 in a direction of being pushed up toward the upstream side by the resin from the second resin injection gate 22img2 on the downstream side. Since the force applied to the resin part 195 and the clamping part 192 is also applied from either the upstream side or the downstream side depending on the progress of molding, the terminal engagement part 23 is applied with a force in a direction to separate the engagement.
Therefore, by forming the shape in which the resin portion 195 and the clamping portion 192 clamp the flange portion 181 of the sleeve 18 and the upper surface or the lower surface of the flange portion 181 of the sleeve 18 contacts the clamping portion 192 as in the embodiment of the present application, when a force pressing the upper surface of the resin portion 195 downward toward the downstream side and a force pushing the lower surface of the clamping portion 192 upward toward the upstream side are applied, there is support of the flange portion 181 of the sleeve 18, and therefore, the force applied to the joint portion is alleviated and the effect of improving the reliability of the joint portion can be obtained.
Further, by providing resin portion 195 so that the inflow of resin into resin portion 195 is suppressed, force F3 applied to connector terminal 19 toward the outer diameter side due to the flow of resin can be suppressed at the time of molding, and as described above, the force applied to joint portion 23 is suppressed, and the reliability of 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 also be obtained.
As in embodiment 2, when the coil terminal 5 and the terminal portion 191 are joined by solder, the amount of gap between the coil terminal 5 and the terminal portion 191 is more easily managed, and an effect that the joining between the coil terminal 5 and the terminal portion 191 is more stabilized can be obtained.
In embodiment 4, the following technical features are disclosed as an example in fig. 6.
That is, the downstream end of the pipe 20, which is a hollow extension pipe through which the fuel flows, is fitted into the upstream end of the sleeve 18.
A resin portion 195 is provided, and the resin portion 195 is located on the upstream side of the portion where the terminal portion 191 and the coil terminal 5 are connected, and is sandwiched 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 linear portion of the connector terminal 19 extending parallel to the axial center of the fuel injection valve, and the resin portion 195 extends parallel to the axial center of the fuel injection valve and projects from the linear portion of the connector terminal 19 in the radial direction toward the pipe 20 side. Further, the resin part 195 and the clamping part 192 of such a structure are formed integrally by molding.
Further, a flange portion 181 is provided at an upstream end of the sleeve 18, and positions of the clamping portion 192 and the resin portion 195 in the upstream direction and the downstream direction are determined by abutment of the flange portion 181 with at least one of the clamping portion 192 and the resin portion 195. As illustrated in fig. 6, the integral structure of the resin portion 195 and the clamping portion 192 is preferably configured such that a groove extending in the circumferential direction is provided at the boundary between the resin portion 195 and the clamping portion 192, and a part of the outer periphery of the flange portion 181 is fitted into the groove.
In fig. 1 to 3 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, but the joining method between the coil terminal 5 and the terminal portion 191, the presence or absence of the gap, and the like are not limited thereto.
In the drawings, the same reference numerals denote the same or corresponding parts.
In addition, although the present application describes various exemplary embodiments and examples, various features, modes, and functions described in one or more embodiments are not limited to the application to specific embodiments, and can be applied to the embodiments alone or in various combinations.
Therefore, countless modifications not illustrated are assumed to be within the technical scope disclosed in the present application. For example, the case where at least one component is modified, added, or omitted is included, and the case where at least one component is extracted and combined with the components of the other embodiments is also included.
(symbol description)
1, a coil; 2, a bobbin; 3a core part; 4, a shell; 5 a coil terminal; 51 holes; 6, covering; 7, a spring; 8 an armature; 9 a solenoid device; 10 rods; 11 a conduit; 12 seat surfaces; 13 inserting the plug-in unit; 14 spheres; 15 valve seats; 16 plate members; 17 a valve core; 18 a sleeve; 181 flange part; 19 a connector terminal; 191 terminal portions; 192 a clamping portion; 193a recess; 193A face; 194 a convex portion; 195 a resin part; 20 a tube; 21 a connector portion; 22 a resin outer skin; 22img1 first resin injection gate; 22img2 second resin injection gate; 23 a terminal engaging portion; the FFA injects a fuel stream.
Claims (10)
1. A fuel injection valve controls the amount of fuel injected from a valve element to the outside through the inside of a sleeve by controlling a control current to a coil,
it is characterized in that the preparation method is characterized in that,
a terminal portion of a connector terminal is electrically and mechanically connected to a coil terminal of the coil, and the connector terminal integrally has a clamping portion that clamps an outer periphery of a predetermined portion on an upstream side of the sleeve, and is supplied with a control current flowing to the coil from outside.
2. A fuel injection valve controls the amount of fuel injected from a valve element to the outside through the inside of a sleeve by controlling a control current to a coil,
it is characterized in that the preparation method is characterized in that,
a connector terminal to which a control current flowing in the coil is supplied from outside has a clamping portion on an upstream side of a terminal portion thereof, the clamping portion clamping a part of an outer periphery of the sleeve on the upstream side,
the connector terminal holds the sleeve via the grip portion,
the terminal portion of the connector terminal is electrically and mechanically connected to a coil terminal of the coil.
3. The fuel injection valve according to claim 1 or 2,
the bobbin around which the coil is wound and from which the coil terminal extends outward is held by the sleeve.
4. The fuel injection valve according to any one of claims 1 to 3,
the clip portion is located upstream of the coil, and the portion of the terminal portion connected to the coil terminal is located upstream of the coil.
5. The fuel injection valve according to any one of claims 1 to 3,
a recessed portion is formed in a portion of the clamping portion corresponding to the coil terminal, and a relative position of the terminal portion and the coil terminal is determined by the recessed portion.
6. The fuel injection valve according to any one of claims 1 to 5,
a convex portion is provided on one of the clamping portion and the coil terminal, and a concave portion is provided on the other,
the relative position of the terminal portion and the coil terminal is determined by fitting the convex portion and the concave portion.
7. The fuel injection valve according to any one of claims 1 to 6,
a downstream end of a pipe is fitted into an upstream end of the sleeve, the fuel flows inside the pipe,
a resin portion is provided at a position on an upstream side of a portion where the terminal portion is connected to the coil terminal, the resin portion being sandwiched between the connector terminal and the tube.
8. The fuel injection valve according to claim 7,
the clamping portion is integral with the resin portion.
9. The fuel injection valve according to claim 8,
a flange portion is provided at an upstream end of the sleeve,
the flange portion defines the upstream and downstream positions of the clamping portion and the resin portion.
10. The fuel injection valve according to claim 9,
the upstream and downstream positions of the terminal portions of the connector terminal are determined by determining the upstream and downstream positions of the nip portion and the resin portion.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/019747 WO2019224929A1 (en) | 2018-05-23 | 2018-05-23 | Fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112135966A true CN112135966A (en) | 2020-12-25 |
| CN112135966B CN112135966B (en) | 2022-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880093570.6A Active CN112135966B (en) | 2018-05-23 | 2018-05-23 | Fuel injection valve |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7019804B2 (en) |
| CN (1) | CN112135966B (en) |
| WO (1) | WO2019224929A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230011415A1 (en) * | 2019-12-18 | 2023-01-12 | Robert Bosch Gmbh | Fuel Injector including Terminal Blade |
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| CN102032082A (en) * | 2009-09-25 | 2011-04-27 | 日立汽车系统株式会社 | Fuel injection valve |
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2018
- 2018-05-23 WO PCT/JP2018/019747 patent/WO2019224929A1/en active Application Filing
- 2018-05-23 CN CN201880093570.6A patent/CN112135966B/en active Active
- 2018-05-23 JP JP2020520917A patent/JP7019804B2/en active Active
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| JPH0383369U (en) * | 1989-12-13 | 1991-08-23 | ||
| JPH08100731A (en) * | 1994-09-30 | 1996-04-16 | Keihin Seiki Mfg Co Ltd | Electromagnetic fuel injection valve |
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| CN1755093A (en) * | 2004-09-27 | 2006-04-05 | 株式会社京浜 | Electromagnet type fuel injection valve |
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| US20160208729A1 (en) * | 2015-01-20 | 2016-07-21 | Keihin Corporation | Fuel injection valve with cylinder internal pressure sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112135966B (en) | 2022-05-31 |
| JPWO2019224929A1 (en) | 2021-04-08 |
| JP7019804B2 (en) | 2022-02-15 |
| WO2019224929A1 (en) | 2019-11-28 |
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