JP6318866B2 - Fuel injection valve - Google Patents

Description

  The present invention relates to a fuel injection valve for injecting and supplying fuel to an internal combustion engine (hereinafter referred to as “engine”).

  Conventionally, a fuel injection valve that opens and closes an injection hole of a housing and injects fuel in the housing is known. For example, in Patent Document 1, a needle that opens and closes a nozzle hole, a spring that biases the needle in the valve closing direction, a housing that is formed by a member separate from the needle and that has a magnetic attractive force between the stationary core and the fixed core. A fuel injection valve including a movable core that reciprocates inside and another spring that urges the movable core in the valve opening direction is described.

JP 2013-199924 A

  Generally, in a fuel injection valve in which a needle and a movable core are formed of separate members, when the injection hole is closed, the movable core that moves in the valve closing direction together with the needle compresses another spring. When the needle comes into contact with the valve seat formed at the edge of the nozzle hole, the needle moving in the valve closing direction stops. However, since the movable core further moves in the valve closing direction due to inertia, the other springs are compressed compared to the steady state when the valve is closed while the needle and the movable core are in contact with each other and the nozzle hole is closed. Since the urging force of the other spring compressed compared to the steady state is larger than the urging force in the steady state, the movable core moves again in the valve opening direction by the urging force of the other spring and collides with the needle. There is a fear. For this reason, the fuel injection valve described in Patent Document 1 is provided with a regulating member that regulates movement of the movable core in the valve closing direction. However, since the restriction member is fixed to the inner wall of the housing, it is difficult to accurately adjust the clearance between the movable core and the restriction member so that other springs are not compressed too much.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a fuel injection valve that can easily adjust the clearance between a movable member and a regulating member that regulates movement of the movable core in the valve closing direction. It is to provide.

The present invention is a fuel injection valve, and includes a housing, a fixed core, a needle, a movable core, a coil, a first urging member, a second urging member, and a regulating member. The first biasing member biases the needle in the valve closing direction. The second urging member urges the movable core in the valve opening direction. The restricting member is composed of a member different from the fixed core, one end of which is fixed to the fixed core and is provided so as to protrude from the fixed core, and the other end of the protrusion is provided on the movable core. It is formed from a receiving portion having an end face that can come into contact with the end face on the injection hole side.
In the fuel injection valve of the present invention, when the coil is energized, the movable core and the needle move together in the valve opening direction. When energization of the coil is stopped, after the needle abuts the valve seat, the end surface of the movable core opposite to the nozzle hole side is separated from the needle restricting portion, and the end surface of the movable core on the nozzle hole side is the receiving portion. It contacts, It is characterized by the above-mentioned.

  In the fuel injection valve according to the present invention, when the nozzle hole is closed by the needle, the movable core that moves in the valve closing direction together with the needle stops after the needle abuts against the valve seat and stops. The end surface of the portion on the movable core side comes into contact. When the movable core and the receiving portion come into contact with each other, the movable core is restricted from moving in the valve closing direction and stops. This prevents the movable core from moving too much in the valve closing direction, and the compression of the second urging member is the compression in the steady state when the valve is closed while the needle and the movable core are in contact with each other and the nozzle hole is closed. Same level. Therefore, after the needle closes the nozzle hole, the urging force of the second urging member compressed from the steady state prevents the movable core from moving again in the valve opening direction and opening the nozzle hole. Prevent unintentional fuel injection after

  Since the movable core reciprocates with respect to the fixed core by a magnetic attractive force between the movable core and the fixed core, it is desirable that the position of the receiving portion that contacts the movable core is determined with respect to the fixed core. In the fuel injection valve of the present invention, the restricting member is formed from a member different from the fixed core, and is fixed to the fixed core. Thereby, the distance which the movement to the valve closing direction of the movable core with respect to a fixed core can adjust easily by changing the length of a protrusion part. Therefore, the manufacturing cost of the fuel injection valve can be reduced as compared with the case where the regulating member is fixed to the inner wall of the housing with high precision like the fuel injection valve described in Patent Document 1.

It is sectional drawing of the fuel injection valve by 1st embodiment of this invention. It is the II section enlarged view of FIG. It is sectional drawing of the fuel injection valve by 2nd embodiment of this invention.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1 and 2 show a fuel injection valve 1 according to a first embodiment of the present invention. FIG. 1 illustrates a valve opening direction in which the needle 40 moves away from the valve seat 304 and a valve closing direction in which the needle 40 moves in contact with the valve seat 304.

  The fuel injection valve 1 is used, for example, in a fuel injection device of a direct injection gasoline engine (not shown), and injects and supplies gasoline as fuel to the engine. The fuel injection valve 1 includes a housing 20, a needle 40, a movable core 45, a regulating member 50, a fixed core 33, a coil 35, a spring 24 as a “first urging member”, a spring 26 as a “second urging member”, and the like. Is provided.

  As shown in FIG. 1, the housing 20 includes a first housing member 21, a second housing member 22, a third housing member 23, and an injection nozzle 30. The first housing member 21, the second housing member 22, and the third housing member 23 are all formed in a substantially cylindrical shape, and are coaxial in the order of the first housing member 21, the second housing member 22, and the third housing member 23. Arranged and connected to each other.

  The first housing member 21 and the third housing member 23 are subjected to a magnetic stabilization process. The first housing member 21 and the third housing member 23 have a relatively low hardness. On the other hand, the hardness of the second housing member 22 is higher than the hardness of the first housing member 21 and the third housing member 23.

  The injection nozzle 30 is provided at the end of the first housing member 21 opposite to the second housing member 22. The injection nozzle 30 is welded to one end of the first housing member 21. The injection nozzle 30 is subjected to a quenching process so as to have a predetermined hardness. The injection nozzle 30 is formed of an injection part 301 and a cylinder part 302.

  The injection unit 301 is formed in line symmetry with the central axis CA0 of the housing 20 as an axis of symmetry. A plurality of injection holes 31 for communicating the inside and the outside of the housing 20 are formed in the injection unit 301. An annular valve seat 304 is formed at the edge of the inner opening that is the opening on the inner side of the housing 20 of the nozzle hole 31.

  The cylindrical part 302 is connected to the radially outer side of the injection part 301 and is provided so as to extend on the opposite side to the direction in which the outer wall 303 of the injection part 301 protrudes. The cylindrical part 302 is connected to the first housing member 21 at the end opposite to the side connected to the injection part 301.

  The needle 40 is made of a metal that has been subjected to a quenching process so as to be approximately equal to the hardness of the injection nozzle 30. The needle 40 is accommodated in the housing 20. The needle 40 is formed of a main body portion 41, a needle restricting portion 42, and the like. In the needle 40, the main body portion 41 and the needle regulating portion 42 are integrally formed.

The main body 41 is formed in a rod shape so as to extend in the direction of the central axis CA0. The main body 41 has a seal part 411 and a sliding contact part 412 at the end part on the injection hole 31 side.
The seal portion 411 is provided so as to be able to contact the valve seat 304. When the seal portion 411 is separated from the valve seat 304 or abuts against the valve seat 304, the nozzle hole 31 is opened and closed, and the inside and the outside of the housing 20 are communicated or blocked.
The sliding contact portion 412 is formed on the side opposite to the nozzle hole 31 side of the seal portion 411. The sliding contact portion 412 is formed in a substantially cylindrical shape, and a part of the outer wall is chamfered. The slidable contact portion 412 can be slidably contacted with the inner wall of the injection nozzle 30 at a portion of the outer wall that is not chamfered. Thereby, the needle 40 is guided to reciprocate at the tip portion on the injection hole 31 side.

  The needle restricting portion 42 is a substantially disc-shaped portion provided at the end portion of the main body portion 41 opposite to the nozzle hole 31 side. The needle regulating portion 42 is formed so that the outer diameter is larger than the outer diameter of the main body portion 41 and the inner diameter of the central through hole 451 of the movable core 45. The end surface 421 on the nozzle hole 31 side of the needle restricting portion 42 can come into contact with the end surface 453 on the opposite side to the nozzle hole 31 side of the movable core 45.

The movable core 45 is formed in a substantially cylindrical shape and subjected to a magnetic stabilization process. The hardness of the movable core 45 is relatively low and is substantially equal to the hardness of the first housing member 21 and the third housing member 23. The movable core 45 has a central through hole 451 and a core fuel passage 452 as “first through holes”. The central through hole 451 is formed in the approximate center of the movable core 45 so as to penetrate the movable core 45 in the axial direction, and the main body 41 is inserted therethrough. A plurality of core fuel passages 452 are formed through the movable core 45 in the axial direction outside the central through hole 451 in the radial direction. The movable core 45 is formed from a through-hole forming part 46 and a cylindrical part 47.
The through-hole forming portion 46 is provided at the approximate center of the movable core 45. The through hole forming part 46 forms a central through hole 451.
The cylindrical portion 47 is a cylindrical portion provided outside the through hole forming portion 46 in the radial direction. The axial length of the cylindrical portion 47 is longer than the axial length of the through hole forming portion 46. The cylindrical portion 47 forms a core fuel passage 452.

  The fixed core 33 is formed in a substantially cylindrical shape and subjected to a magnetic stabilization process. The hardness of the fixed core 33 is substantially equal to the hardness of the movable core 45, but in order to ensure the function as a stopper of the movable core 45, for example, chrome plating is applied to the surface to ensure the necessary hardness. The fixed core 33 is welded to the third housing member 23 of the housing 20 so as to be fixed to the inside of the housing 20.

  The coil 35 is formed in a substantially cylindrical shape, and is mainly provided so as to surround the radially outer sides of the second housing member 22 and the third housing member 23. The coil 35 forms a magnetic field around it when power is supplied.

  The spring 24 is provided so that one end thereof is in contact with the end surface 422 opposite to the nozzle hole 31 side of the needle restricting portion 42. The other end of the spring 24 is in contact with one end face of the adjusting pipe 11 that is press-fitted and fixed inside the fixed core 33. The spring 24 has a force that extends in the direction of the central axis CA0. Thereby, the spring 24 urges the needle 40 in the direction of the nozzle hole 31, that is, the valve closing direction.

  The spring 26 is provided outside the main body 41 in the radial direction. One end of the spring 26 is in contact with a step surface 211 formed on the inner wall of the first housing member 21. The other end of the spring 26 is in contact with the end surface 461 on the injection hole 31 side of the through hole forming portion 46 while being guided by the inner wall of the cylindrical portion 47. The spring 26 has a force extending in the axial direction. Thereby, the spring 26 urges the movable core 45 in the direction opposite to the injection hole 31, that is, in the valve opening direction.

  In the present embodiment, the urging force of the spring 24 is set larger than the urging force of the spring 26. Thus, in a state where power is not supplied to the coil 35, the seal portion 411 is moved to the valve seat 304 due to the difference in urging force between the spring 24 and the spring 26 and the pressure of the fuel inside the first housing member 21. The contact state, that is, the nozzle hole 31 is closed.

  The restricting member 50 is provided so as to extend in the direction of the injection hole 31 from the end of the fixed core 33 on the injection hole 31 side. The restricting member 50 is composed of a member different from the fixed core 33. The regulating member 50 of the first embodiment is formed in a cylindrical shape so as to surround the radially outer side of the movable core 45. The restricting member 50 includes a protruding portion 51 and a receiving portion 52.

  The protrusion 51 is formed in a substantially cylindrical shape so as to extend in the direction of the central axis CA0. The end of the protrusion 51 opposite to the injection hole 31 side is press-fitted and fixed in a groove 331 formed on the end of the injection hole 31 on the radially outer side of the fixed core 33. A receiving portion 52 is provided at an end portion of the protruding portion 51 on the nozzle hole 31 side.

  The protrusion 51 has a length in the direction of the central axis CA0, and the distance from the end surface 332 of the fixed core 33 on the movable core 45 side to the end surface 521 on the opposite side to the injection hole 31 side of the receiving portion 52 described later is the movable core The nozzle hole 31 of the movable core 45 in the steady state at the time of closing the nozzle hole 31 while the needle 40 and the movable core 45 are in contact with each other, the length of the central axis CA0 in the direction of the central axis CA0, the target lift amount of the needle 40 It is formed so as to be a total of a clearance of a design tolerance level formed between the side end surface 454 and the end surface 521 of the receiving portion 52.

  The receiving part 52 is formed so as to extend radially inward from the end part of the protruding part 51 on the injection hole 31 side. An end surface 521 opposite to the injection hole 31 side of the receiving portion 52 is formed so as to be able to contact the end surface 454 of the movable core 45.

  A substantially cylindrical fuel introduction pipe 12 is provided at the end of the third housing member 23 opposite to the second housing member 22. A filter 13 is provided inside the fuel introduction pipe 12. The filter 13 collects foreign matters contained in the fuel that has flowed from the introduction port 14 of the fuel introduction pipe 12.

  The radially outer sides of the fuel introduction pipe 12 and the third housing member 23 are molded with resin. A connector 15 is formed in the mold part. The connector 15 is insert-molded with a terminal 16 for supplying power to the coil 35. A cylindrical holder 17 is provided outside the coil 35 in the radial direction so as to cover the coil 35.

  Next, the operation of the fuel injection valve 1 will be described with reference to FIG.

  When no electric power is supplied to the coil 35, the seal portion 411 is in contact with the valve seat 304 in the fuel injection valve 1. At this time, as shown in FIG. 2, the end surface 454 of the movable core 45 and the end surface 521 of the receiving portion 52 are in contact with each other.

  When electric power is supplied to the coil 35, a magnetic field is generated around the coil 35, and a magnetic circuit is formed inside the fixed core 33, the movable core 45, the first housing member 21, the third housing member 23, and the holder 17. Is done. As a result, a magnetic attractive force is generated between the fixed core 33 and the movable core 45.

  When the magnetic attractive force generated between the fixed core 33 and the movable core 45 becomes larger than the urging force of the spring 26, the movable core 45 moves in the valve opening direction. Since the needle 40 is in contact with the end face 453 of the movable core 45, the needle 40 has a total of the magnetic attractive force between the movable core 45 and the fixed core 33 and the biasing force of the spring 26 in the valve opening direction. Works. On the other hand, when the seal portion 411 is in contact with the valve seat 304, the needle 40 has an area on the radially inner side of the portion where the seal portion 411 and the valve seat 304 are in contact with each other and the inside of the first housing member 21. A force corresponding to the product of the fuel pressure (hereinafter referred to as “fuel pressure”) and the urging force of the spring 24 act in the valve closing direction. When the sum of the magnetic attractive force and the urging force of the spring 26 is larger than the sum of the fuel pressure and the urging force of the spring 24, the needle 40 moves in the valve opening direction and the seal portion 411 is separated from the valve seat 304. As a result, the fuel staying inside the first housing member 21 is injected and supplied from the injection hole 31 to the combustion chamber of the engine.

  When the supply of electric power to the coil 35 is stopped after the desired amount of fuel is injected and supplied to the combustion chamber, the magnetic field around the coil 35 disappears. When the magnetic field around the coil 35 disappears, the magnetic attractive force between the fixed core 33 and the movable core 45 disappears, and the movable core 45 moves together with the needle 40 in the valve closing direction by the urging force of the spring 24. When the seal portion 411 contacts the valve seat 304, the needle 40 that has moved in the valve closing direction stops. On the other hand, the movable core 45 that has moved in the valve closing direction together with the needle 40 tries to continue to move further in the valve closing direction due to inertia, but stops by contacting the receiving portion 52.

  Conventionally, when a nozzle hole is closed in a fuel injection valve in which a needle and a movable core are configured by separate members, the movable core and the needle move in the valve closing direction while being in contact with each other. When the needle comes into contact with the valve seat, the needle stops, but the movable core further moves in the valve closing direction due to inertia. For this reason, the spring urging the movable core in the valve opening direction is compressed as compared with the steady state when the valve is closed while the needle and the movable core are in contact with each other, and the spring is movable. The urging force acting on the core in the valve opening direction is larger than that in the steady state. When the urging force of the spring in the valve opening direction increases, the movable core moving in the valve closing direction may stop once and then move in the valve opening direction again to collide with the needle. Since the impacted needle is separated from the valve seat and injects fuel again, there is a possibility that unintended fuel may be injected after a predetermined amount of fuel is injected and the injection hole is once closed.

The fuel injection valve 1 according to the first embodiment includes a regulating member 50 that has a receiving portion 52 that is located at a certain distance from the fixed core 33 and that can contact the end surface 454 of the movable core 45. When the injection hole 31 is closed in the fuel injection valve 1, the needle 40 stops when the needle 40 moving in the valve closing direction together with the movable core 45 comes into contact with the valve seat 304, but the movable core 45 is further moved in the valve closing direction by inertia. Try to keep moving. At this time, since the movable core 45 that moves in the valve closing direction contacts the receiving portion 52, the movable core 45 stops without moving too much in the valve closing direction.
Thus, in the fuel injection valve 1 according to the first embodiment, since the movement of the movable core 45 in the valve closing direction is restricted by the restriction member 50, the amount of compression of the spring 26 determined by the position of the movable core 45 is large. The length is about the same as the steady state when the needle 40 and the movable core 45 are in contact with each other and the nozzle hole 31 is closed. Accordingly, the movable core 45 is moved again in the valve opening direction by the biasing force of the spring 26 compressed from the steady state, and the needle 40 is separated from the valve seat 304 again by the movable core 45 moving in the valve opening direction. To prevent. Therefore, unintentional fuel injection after the injection hole 31 is once closed is prevented, and the fuel injection amount is controlled with high accuracy.

  Since the movable core reciprocates with respect to the fixed core by a magnetic attractive force between the movable core and the fixed core, it is desirable that the range in which the movable core is allowed to move is determined with respect to the fixed core. The regulating member 50 provided in the fuel injection valve 1 is press-fitted and fixed to the fixed core 33 as a separate member from the fixed core 33 and the housing 20. Thereby, by adjusting the length by which the restricting member 50 is press-fitted and fixed to the fixed core 33, the end surface 332 of the fixed core 33 and the end surface 521 of the receiving portion 52 as a range in which the movement of the movable core 45 is allowed. The distance between them can be easily adjusted.

In addition, when a regulating member that regulates the movement of the movable core is fixed to the inner wall of the housing, the regulating member and the inner wall of the housing are processed with high accuracy in order to accurately adjust the clearance between the movable core and the regulating member when the valve is closed. There is a need to. For this reason, there exists a possibility that the manufacturing cost of a fuel injection valve may become high.
In the fuel injection valve 1 according to the first embodiment, since the distance between the fixed core 33 and the movable core 45 can be easily adjusted as described above, the clearance between the movable core and the regulating member when the valve is closed is limited by the regulating member, Unaffected by the processing accuracy of the housing. Thereby, the manufacturing cost of the fuel injection valve 1 can be reduced compared with the case where a control member is fixed to the inner wall of a housing.

(Second embodiment)
Next, the fuel injection valve by 2nd embodiment of this invention is demonstrated based on FIG. The second embodiment differs from the first embodiment in the shape of the movable core and the shape of the restricting portion. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st embodiment, and description is abbreviate | omitted.

  The movable core 65 included in the fuel injection valve 2 according to the second embodiment includes a central member through hole 651 as a “first through hole” and a core fuel passage 652, and a restricting member insertion hole 653 as a “second through hole”. Have The main body 41 is inserted through the central through hole 651. A plurality of restricting member insertion holes 653 are formed on the radially outer side of the central through hole 651. A plurality of core fuel passages 652 are formed on the radially outer side of the restricting member insertion hole 653. The movable core 65 is formed from a through hole forming portion 66 and a cylindrical portion 67.

The through-hole forming portion 66 is provided at the approximate center of the movable core 65. The through hole forming portion 66 forms a central through hole 651 and a plurality of restricting member insertion holes 653. The plurality of restricting member insertion holes 653 are arranged at equal intervals on a circumference centered on a point on the central axis CA0. The restriction member 60 is inserted through the restriction member insertion hole 653.
The cylindrical portion 67 is provided on the radially outer side of the through hole forming portion 66 and forms a core fuel passage 652.

  A plurality of regulating members 60 are provided so as to extend from the end of the fixed core 33 on the nozzle hole 31 side in the direction of the nozzle hole 31. Each of the regulating members 60 is composed of a member different from the fixed core 33. The restricting member 60 includes a protruding portion 61 and a receiving portion 62.

  The protrusion 61 has a cross section perpendicular to the central axis CA0 formed in an arc shape centered on a point on the central axis CA0, and extends from the end of the fixed core 33 through the restricting member insertion hole 653 in the direction of the central axis CA0. It is formed as follows. The end of the protruding portion 61 opposite to the injection hole 31 side is press-fitted and fixed in a groove 333 formed on the end of the injection hole 31 on the radially inner side of the fixed core 33. A receiving portion 62 is provided at the end of the protruding portion 61 on the nozzle hole 31 side.

  The receiving part 62 is formed so as to extend radially outward from the end part of the protruding part 61 on the injection hole 31 side. The end surface 621 of the receiving portion 62 opposite to the nozzle hole 31 side is formed so as to be able to contact the end surface 654 of the through hole forming portion 66 on the nozzle hole 31 side.

  In the fuel injection valve 2 according to the second embodiment, when the desired amount of fuel is injected and the injection hole 31 is closed, the movable core 65 moves together with the needle 40 in the valve closing direction. After the needle 40 abuts on the valve seat 304, the movable core 65 abuts on the receiving portion 62. This prevents the movable core 65 from moving too far in the valve closing direction. Therefore, the second embodiment has the same effect as the first embodiment.

(Other embodiments)
(A) In the first embodiment, the regulating member is formed in a cylindrical shape. In the second embodiment, the restricting member is formed in an arc shape whose cross-sectional shape is centered on a point on the central axis. However, the shape of the regulating member is not limited to this. In the first embodiment, a plurality of regulating members whose cross-sectional shape is formed in an arc shape centered on a point on the central axis may be provided. Further, the cross-sectional shape of the protruding portion may not be an arc shape centered on a point on the central axis. Also in the second embodiment, the cross-sectional shape of the protruding portion may not be an arc shape centered on a point on the central axis.

  (A) In the second embodiment, the plurality of regulating members are arranged at equal intervals on a circumference centered on a point on the central axis. However, the position where the regulating member is arranged is not limited to this.

  (C) In the above-described embodiment, the regulating member is press-fitted and fixed in the groove formed in the fixed core. However, the method for fixing the regulating member is not limited to this. It may be welded or screwed. In the case of screw fixation, the distance between the end surface on the movable core side of the fixed core and the end surface on the movable core side of the receiving portion can be adjusted more easily. Accordingly, it is possible to reliably prevent the needle from being separated from the valve seat by the reciprocating movement of the movable core after the injection hole is closed by the needle, and to control the fuel injection amount with high accuracy.

  (D) In the above-described embodiment, the length of the projecting portion in the central axis direction is the length of the movable core in the central axis direction, the target lift amount of the needle, and the nozzle hole side of the movable core in the steady state when the valve is closed. And the clearance of the design tolerance level formed between the end surface of the receiving portion and the end surface of the receiving portion opposite to the nozzle hole side. However, the length of the discharge part is not limited to this. It is sufficient that the movable core does not move too much in the valve closing direction and the movable core does not move again in the valve opening direction due to the biasing force of the spring.

  As mentioned above, this invention is not limited to such embodiment, It can implement with a various form in the range which does not deviate from the summary.

1, 2 ... Fuel injection valve,
20 ・ ・ ・ Housing,
24 ・ ・ ・ Spring (first urging member),
26 ・ ・ ・ Spring (second urging member),
31 ... nozzle hole,
304 ... valve seat,
33 ... fixed core,
35 ... Coil,
40 ... Needle,
45, 65 ... movable core,
50, 60 ... restriction members.

Claims (3)

A housing (20) having a nozzle hole (31) formed at one end in the direction of the central axis (CA0) and injecting fuel, and a valve seat (304) formed around the nozzle hole;
A fixed core (33) fixed in the housing;
The fixed core is provided on the nozzle hole side so as to be able to reciprocate within the housing, and is provided on the opposite side of the main body part (41) and the nozzle hole side of the main body part from the main body part. A needle (40) having a needle restricting portion (42) having a large diameter, and opening and closing the nozzle hole when separated from or in contact with the valve seat;
An end surface (453) opposite to the nozzle hole side is provided on the nozzle hole side of the fixed core so as to be movable relative to the needle, and an end surface (421) on the nozzle hole side of the needle restricting portion is in contact with the needle hole. A movable core (45, 65) formed to be able to contact,
A coil (35) for generating a magnetic attractive force for attracting the movable core in a valve opening direction between the movable core and the fixed core by energization;
A first biasing member (24) for biasing the needle in the valve closing direction;
A second biasing member (26) for biasing the movable core in the valve opening direction;
Protruding portions (51, 61) that are formed of a member different from the fixed core, and have one end portion fixed to the fixed core and protruding from the fixed core, and the other end portion of the protruding portion. The movable core is formed from a receiving portion (52, 62) having end faces (521, 621) that can come into contact with the end face (454, 654) of the movable core on the nozzle hole side, A regulating member (50, 60) for regulating movement of the movable core to the nozzle hole side when the end surface and the end surface on the movable core side of the receiving portion come into contact with each other;
Equipped with a,
When the coil is energized, the movable core and the needle move together in the valve opening direction,
When energization of the coil is stopped, after the needle comes into contact with the valve seat, an end surface of the movable core opposite to the nozzle hole side is separated from the needle restricting portion, and the injection of the movable core is performed. A fuel injection valve, wherein an end face on a hole side abuts on the receiving portion .   The fuel injection valve according to claim 1, wherein the protruding portion is provided on an outer side in the radial direction of the movable core.   The restricting member is provided so that the protruding portion is inserted into a second through hole (653) formed radially outside the first through hole (451, 651) through which the main body portion of the movable core is inserted. The fuel injection valve according to claim 1, wherein:

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