JPH11182377A - Fuel injection valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce operation sound, prevent the wear of a contact face, and prevent a deviation of a regulation position of a movable body due to the deterioration of an elastic member to maintain the initial performance for a long time. SOLUTION: This fuel injection valve is provided with an injection valve main body in which a solenoid coil is assembled and a movable body 17 which is opened and closed due to the electromagnetic action of the solenoid coil. Contact faces on movable side 17e, 17f and contact faces on fixed side 9c, 11 which regulate open and close positions of the movable body 17 due to mutual contact at the time of opening and closing of the movable body 17 are formed in the movable body 17 and the injection valve main body. Elastic members 18, 19 absorbing a shock generated when the contact faces 17e, 17f come into contact with the contact faces 9c, 11 by elastic deformation are provided. The contact faces 17e, 17f come into contact with the contact faces 9c, 11 after the elastic members 18, 19 are elastically deformed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fuel injection valve used for an internal combustion engine.

[0002]

2. Description of the Related Art A conventional fuel injection valve includes an injection valve body in which a solenoid coil is incorporated, a fuel passage formed in the injection valve body, and a movable body that opens and closes the fuel passage by electromagnetic action of the solenoid coil. The movable body and the injection valve body are formed with a movable contact surface and a fixed contact surface that regulate the open / close position of the movable body by mutual contact when the movable body is opened and closed. Since the members forming the movable-side contact surface and the fixed-side contact surface are usually made of a metallic magnetic material, the movable-side contact surface comes into contact with the fixed-side contact surface by a metal touch (for example, see Patent- 25478
No. 65). In some cases, an elastic material such as rubber is attached to the movable-side contact surface or the fixed-side contact surface by means of elastic deformation to absorb the impact at the time of contact (see, for example, Japanese Patent Application Laid-Open No. 8-61152).

[0003]

In the structure in which the contact surface has a metal touch, there is a problem that an operation sound is generated by an impact at the time of the contact. In addition, the contact surface is likely to be worn due to the impact at the time of contact, and the wear causes a shift in the regulation position of the movable body, thereby changing the opening / closing stroke of the movable body and the air gap of the magnetic path, and eventually the performance. Therefore, there remains a problem that the initial performance cannot be maintained.

[0004] Further, in a structure in which an elastic material is attached to a contact surface, compared with a structure in which the contact surface has a metal touch,
The problem of operating noise and abrasion of the abutment surface is improved. However, since the elastic member is easily deteriorated, it is expected that the performance will be changed. That is, when the elastic member deteriorates,
Since a displacement occurs in the regulation position of the movable body, there remains a problem that the initial performance cannot be maintained as described above.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to reduce operating noise and prevent abrasion of a contact surface, and to improve elastic members. It is an object of the present invention to provide a fuel injection valve capable of preventing displacement of a regulated position of a movable body due to deterioration and maintaining initial performance for a long period of time.

[0006]

According to a first aspect of the present invention, there is provided an injection valve body in which a solenoid coil is incorporated, a fuel passage formed in the injection valve body, and an electromagnetic action of the solenoid coil. A movable body that opens and closes the fuel passage by the movable body and the injection valve body. The movable body and the injection valve main body have a movable contact surface and a fixed side that regulate the open / close position of the movable body by mutual contact when the movable body is opened and closed. A fuel injection valve having a contact surface, wherein an elastic member is provided for absorbing an impact caused by elastic deformation of the movable contact surface against the fixed contact surface, and the movable contact is provided. The surface can be brought into contact with the fixed-side contact surface after the elastic member is elastically deformed. With this configuration, the impact at the time of contact of the movable contact surface with the fixed contact surface is absorbed by the elastic deformation of the elastic member, so that the operation noise is reduced and the contact surface is prevented from being worn. You. Further, after the elastic member is elastically deformed, the movable contact surface comes into contact with the fixed contact surface, so that the elastic member is not deteriorated.
The displacement of the regulation position of the movable body can be prevented, so that the initial performance can be maintained for a long time.

According to a second aspect of the invention, there is provided the fuel injection valve according to the first aspect, wherein a mounting groove is provided on the movable contact surface or the fixed contact surface, and an elastic member is provided on the mounting groove. A space is provided for accommodating an enormous portion due to elastic deformation of the elastic member when the contact surfaces come into contact with each other. With this configuration, when the elastic member provided in the mounting groove of the movable contact surface or the fixed contact surface is pressed between the contact surfaces and is elastically deformed, a huge part due to the elastic deformation becomes a space. Since it is accommodated, it is possible to prevent the displacement of the regulated position of the movable body caused by the swelling of the elastic member onto the contact surface.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment will be described with reference to FIGS. In FIG. 1 showing a sectional view of the fuel injection valve, a substantially cylindrical body 1 is shown.
Is made of a magnetic material and has an annular flange portion 1a protruding from the inner periphery of the central portion. The front half of a substantially cylindrical core 2 is inserted into the rear half (the right half in FIG. 1) of the body 1. The core 2 is made of a magnetic material and has an annular flange portion 2a protruding from the outer periphery of the central portion. The body 1 is fixed to the core 2 by caulking the rear end of the body 1 to the flange 2 a of the core 2.

A substantially cylindrical bobbin 3 is arranged between the inner periphery of the rear half of the body 1 and the outer periphery of the front half of the core 2. The bobbin 3 is made of an electrically insulating material such as a synthetic resin, and has a solenoid coil 4 wound in a multilayer shape. The solenoid coil 4 is electrically connected to a terminal 5 that protrudes rearward through a through hole (symbol omitted) of the flange portion 2 a of the core 2. Note that ring-shaped sealing members 6 and 7 are interposed between the front end of the bobbin 3 and the body 1 and between the rear end of the bobbin 3 and the core 2, respectively.

A power receiving connector 8 is formed around the rear half of the core 2 by resin molding. The power receiving connector 8 has a socket portion 8 a surrounding the periphery of the terminal 5. A power supply connector of an electronic control unit (not shown) is connected to the socket 8a. As a result, a signal from the electronic control unit is input to the solenoid coil 4 through the terminal 5 to energize and release the solenoid coil 4.

In the front half (the left half in FIG. 1) of the body 1, a substantially ring-shaped stopper member 9, a movable body 17 provided with a support spring 20, which will be described later, and a valve seat 10 are sequentially incorporated. . The valve seat 10 is made of a stainless steel material, and has axial holes 12a, 12a.
A fuel injection port 12 composed of b and 12c is formed, and a seat surface 11 that forms a plane orthogonal to the axis is formed at the rear end face. The fuel injection port 12 has a tapered hole portion 12a having a smaller diameter from the rear end face toward the front, and the tapered hole portion 12a.
Small hole portion 12b continuous with the same diameter as the front end hole diameter
And a large-diameter hole portion 12c which is continuous with a front end of the small-diameter hole portion 12b via a stepped surface (reference numeral omitted) and is formed in a front half portion of the valve seat 10.

The front end of the body 1 is caulked to a stepped portion on the outer periphery of the rear portion of the valve seat 10.
As a result, the stopper member 9, the valve seat 10, and the like are fixed to the body 1. Further, a ring-shaped spacer member 13 for determining a mounting dimension of the present fuel injection valve is mounted on a stepped portion on the outer periphery of the central portion of the valve seat 10. Further, a ring-shaped seal member 14 is interposed between the valve seat 10 and the body 1. In addition, fixed parts other than the movable body 17 mentioned later are collectively called the injection valve main body 15.

FIG. 2 is an enlarged view of a main part including the stopper member 9 and the movable body 17 shown in FIG. In FIG.
The stopper member 9 is sandwiched between the valve seat 10 and the flange 1a of the body 1 when the valve seat 10 is attached to the body 1. The stopper member 9 is made of an electromagnetic stainless material that is a magnetic material.
An outer ring portion 9a fitted to the body 1 and a stopper piece 9b abutting on the flange portion 1a of the body 1 are provided. The front surface of the stopper piece 9b is a stopper surface 9c.

In FIG. 2, the movable body 17 is made of an electromagnetic stainless steel material, which is a magnetic material, and has a cylindrical main part 17a having an annular cross section substantially similar to the core 2, and a main part 17a of the main part 17a. An annular flange portion 17 protruding from the outer periphery of the front portion
b, and a valve portion 17c which is continuous to the front portion of the main portion 17a with substantially the same outer diameter. The main portion 17a and the flange portion 17b of the movable body 17 function as an armature that receives an attractive force from the core 2 when the solenoid coil 4 is energized.

The rear surface of the flange portion 17b is an abutment surface 17e which can make surface contact with, ie, abut against, the stopper surface 9c of the stopper member 9. The abutment surface 17e
And the stopper surface 9c restricts the valve opening position of the movable body 17 by mutual contact when the movable body 17 is opened. The abutment surface 17e corresponds to the movable contact surface in the present invention. The surface 9c corresponds to the fixed-side contact surface according to the present invention. The movable body 17 and the stopper member 9 are each subjected to a nitrocarburizing treatment for increasing the surface hardness to prevent wear. This improves the separation between the abutment surface 17e and the stopper surface 9c when the valve is closed.

The abutting surface 17e is provided with an annular rubber elastic member 18 which can abut against the stopper surface 9c of the stopper member 9. This will be described in detail with reference to FIGS. 8 and 9 are partial cross-sectional views showing a portion where the elastic member 18 is attached. FIG. 8 shows a state where the elastic member 18 is free, and FIG. 9 shows a state where the elastic member 18 is deformed. As shown in FIG. 8, the elastic member 18 is fitted in a substantially U-shaped cross-section mounting groove 17A formed on the abutment surface 17e. The elastic member 18 has a convex portion 18a having a substantially semicircular cross section at the center in the radial direction. The tip of the projection 18a
The elastic member 18 protrudes from the abutment surface 17e in a free state. Further, an abutment surface 17 is provided on the inner and outer peripheral portions of the convex portion 18a.
A concave surface 18b recessed from e is formed. The concave surface 18
space S ₁ is provided by the b formation. When the valve is opened, the protrusion 18a of the elastic member 18 has a stopper surface 9c.
(See FIG. 2), the impact at the time of contact between the abutment surface 17e and the stopper surface 9c is absorbed by elastic deformation, and thereafter, as shown in FIG. 9, the abutment surface 17e and the stopper surface 9c. 9c can be abutted. The space S
₁ accommodates an enormous portion due to elastic deformation of the elastic member 18 when the abutment surface 17e and the stopper surface 9c abut.

In FIG. 2, the front surface of the valve portion 17c is an abutment surface 17f that can make surface contact with, that is, abut against, the seating surface 11 of the valve seat 10. The abutment surface 17f and the seating surface 11 regulate the valve closing position of the movable body 17 by mutual contact when the movable body 17 is closed, and the abutment surface 17f is a movable-side abutment surface referred to in the present invention. , And the stopper surface 9c of the seat surface 11 corresponds to the fixed-side contact surface in the present invention.

The abutment surface 17f has an annular rubber elastic member 19 which can contact the seat surface 11 of the valve seat 10.
Is provided. This will be described in detail with reference to FIGS. 6 and 7 are partial cross-sectional views showing a portion where the elastic member 19 is attached. FIG.
Is a deformed state of the elastic member 19. As shown in FIG.
The elastic member 19 has a substantially U-shaped cross section formed on the abutment surface 17f.
It is fitted in the letter-shaped mounting groove 17B. On the elastic member 19, a convex portion 19a having a substantially semicircular cross section is formed at the center in the radial direction. The tip of the projection 19a protrudes from the abutment surface 17f in a free state of the elastic member 19.
In addition, a concave surface 19b that is recessed from the abutment surface 17f is formed on the inner and outer peripheral portions of the convex portion 19a. Space S ₂ is provided by the formation of the concave surface 19b. The elastic member 19 is configured such that the convex portion 19a is pressed by the seat surface 11 (see FIG. 2) when the valve is closed, so that the abutment surface 17f and the seat surface 11
The shock at the time of abutment is absorbed by elastic deformation,
As shown in FIG. 7, the abutment surface 17f and the seat surface 11 can be brought into contact with each other, and the abutment surface 17f and the seat surface 11 when the valve is closed.
A sealing action between the two. The space S
₂ is an elastic member 1 at the time of contact between the abutment surface 17f and the seating surface 11.
9 accommodates a huge part due to elastic deformation.

In FIG. 2, the movable body 17 has a hollow portion 171 of the main portion 17a and, for example, four through holes communicating with the hollow portion 171 and radially extending in front of the flange portion 17b. A fuel passage (denoted by 171 and 172) including the hole 172 is formed. A spring seating surface (denoted by reference numeral 17d) of a biasing spring 26 which will be described later is formed on the inner periphery of the hollow portion 171 of the main portion 17a.

An inner peripheral portion of a ring-shaped support spring 20 is attached to an outer peripheral corner formed by the flange portion 17b and the valve portion 17c of the movable body 17. The outer peripheral portion of the support spring 20 is connected to the outer ring portion 9 of the stopper member 9.
a and the valve seat 10. A front view of the support spring 20 is shown in FIG. 3, and a sectional view taken along line AA of FIG. 3 is shown in FIGS. As shown in FIG. 3, the support spring 20 is formed, for example, on two inner and outer circumferential lines, and three long holes 21 and 22 along the circumferential lines are shifted by about １ ／ pitch every three. ing. An intermediate portion between each of the inner and outer long pores 21 and 22 is provided with the other long pores 21 and 22.
2 are formed with concave portions 21a and 22a swelling between each other.

As shown in FIGS. 4 and 5, an elastic member 23 extending over both front and back surfaces is provided on the inner peripheral portion of the support spring 20 by insert molding. An appropriate number (six in FIG. 3) of small holes 24 are formed at substantially equal intervals in a portion of the support spring 20 where the elastic material 23 is insert-molded. Inner peripheral portion of support spring 20 and small hole 24
, The front and back portions of the elastic member 23 are continuous. The support spring 20 has an elastic force such that the inner periphery of the elastic member 23 is pressed against the outer periphery of the valve portion 17 c of the movable body 17.
(See FIG. 2). The elastic material 23
Is preferably provided all around the flange portion 17b, and the opposite side (the left side in FIG. 2) may be provided intermittently in the circumferential direction.

In FIG. 2, the outer peripheral portion of the support spring 20 to which the movable body 17 is attached is supported between the outer ring portion 9a of the stopper member 9 and the valve seat 10 as described above. The movable body 17 is supported in a floating state by the spring 20. Thus, the movable body 17 is supported by the elasticity of the support spring 20 so as to be openable and closable in the axial direction, and is positioned in a direction perpendicular to the axis (ie, in a radial direction). Therefore, the movable body 17 can be opened and closed without a sliding part, and the sliding part does not wear due to the opening and closing of the movable body 17.
Even when using gas fuel such as compressed natural gas with poor lubricity,
The operability of the movable body 17 is not impaired. As the fuel to be used, compressed natural gas is suitable, but the use of other fuels such as gasoline and liquefied gas is not limited.

Also, the long holes 21 and 22 of the support spring 20 are provided.
The formation of 2 makes it easier for the movable body 17 to move in the axial direction while positioning the movable body 17 in the radial direction. The movable body 17 closes when the abutment surface 17f of the valve portion 17c contacts the seat surface 11 of the valve seat 10 as described above, and retreats from the valve-closed state (to the right in FIG. 1). Opening). When the valve is opened, the abutment surface 17 of the flange portion 17b of the movable body 17 is opened.
When e moves into contact with the stopper surface 9c of the stopper member 9, the retracted position of the movable body 17 is regulated. The air gap between the opposing surfaces of the core 2 and the movable body 17 when the valve is opened can be easily adjusted by changing the thickness of the stopper piece 9b of the stopper member 9.

In FIG. 1, an urging spring 26 composed of a coil spring is inserted from the rear of the core 2 and a pipe 27 for adjusting a spring load is inserted. The distal end surface of the urging spring 26 is in contact with the spring seat surface 17d of the movable body 17 (see FIG. 2). The front end surface of the pipe 27 is in contact with the rear end surface of the biasing spring 26. The pipe 27 is fixed to the core 2 by caulking after adjusting the spring load of the urging spring 26 in the valve closing direction with respect to the movable body 17 by adjusting the position thereof. The movable body 17 is always kept in the valve closed state by the spring load of the urging spring 26.

A hollow portion in the core 2 and the pipe 27, a fuel passage 171 of the movable body 17 and a fuel passage 171, between the rear end surface of the core 2 (the right end surface in FIG. 1) and the front end surface of the valve seat 10.
172, a series of fuel passages (designated by reference numeral 29) reaching the fuel injection ports 12 of the valve seat 10 are formed.
A strainer 30 is incorporated in the rear end of the core 2. In addition, a concave groove (symbol is omitted) on the outer periphery of the rear end of the core 2
Are formed, and the O-ring 31 is fitted in the concave groove. The O-ring 31 seals between the core 2 and a delivery pipe (not shown) communicating therewith. A grommet 32 is fitted to the core 2 to be in contact with the rear surface of the power receiving connector 8. The grommet 32 functions as a buffer between the power receiving connector 8 and the delivery pipe.

The support spring 20 and the urging spring 26 apply spring loads acting on the movable body 17 in opposite directions and at different sizes. That is, the urging spring 26
Urges the movable body 17 in the valve closing direction. On the other hand, the support spring 20 urges the movable body 17 in the valve opening direction. The spring load of the urging spring 26 is set to be larger than the spring load of the support spring 20, and the movable body 17 is always kept in the valve closed state.

The operation of the fuel injection valve configured as described above will be described. Fuel supplied from a fuel tank (not shown) in a state where a predetermined pressure is applied via a fuel pump,
After being filtered by the strainer 30, the injection valve body 15
Through a series of fuel passages 29 to the closed portion of the movable body 17 with respect to the valve seat 10. And
Since the movable body 17 is held in a closed state by the combined force of the spring loads of the support spring 20 and the urging spring 26, no fuel is injected. At this time, the elastic member 19 is in the sealed state in FIG. 7, and the elastic member 18 is in the free state in FIG.

Here, when the solenoid coil 4 is energized by the input of an electric signal from the electronic control unit, a magnetic path passing through the core 2, the body 1, the stopper member 9, and the movable body 17 (see a dotted line M in FIG. 1). The movable member 17 is retracted and opened by the electromagnetic action caused by the configuration (1). Thereby, the fuel injection port 12 of the valve seat 10 is
The fuel is injected from. At the time of the valve opening, the abutting surface 17e of the flange portion 17b of the movable body 17 comes into contact with the stopper surface 9c of the stopper member 9 after the impact at the time of contact is reduced by the elastic deformation of the elastic member 18 (FIG. 9). reference). The elastic member 19 is in the free state shown in FIG.

When the electric signal to the solenoid coil 4 is turned off and the electromagnetic action acting on the movable body 17 is eliminated, the movable body 17 is moved by the support spring 20 and the urging spring 26 as described above. When the valve is closed by the resultant force, the injection of the fuel is stopped. When the valve is closed,
The abutment surface 17f of the valve portion 17c of the movable body 17 abuts on the seat surface 11 of the valve seat 10 after the impact at the time of abutment is reduced by the elastic deformation of the elastic member 19 (see FIG. 7). The elastic member 18 is in the free state shown in FIG.

According to the fuel injection valve described above, the movable member 17
When the abutment surface 17e of the movable body 17 abuts against the stopper surface 9c of the stopper member 9 when the valve is opened, the operating noise is reduced by the elastic deformation of the elastic member 18, and the stopper surface 9c And abrasion of the abutment surface 17e is prevented. Further, the abutting surface 1 of the movable body 17 with respect to the seat surface 11 of the valve seat 10 when the movable body 17 is closed.
Since the impact at the time of contact of 7f is absorbed by the elastic deformation of the elastic member 19, the operating noise is reduced, and the abrasion of the seat surface 11 and the abutment surface 17f is prevented.

After the elastic member 18 is elastically deformed when the movable member 17 is opened, the abutment surface 17e abuts against the stopper surface 9c. Can be prevented from shifting in the regulating position, that is, the valve opening position. After the elastic member 19 is elastically deformed when the movable body 17 is closed, the abutment surface 1 is closed.
7 f abuts on the seating surface 11, it is possible to prevent the displacement of the restricting position of the movable body 17, that is, the valve closing position, without relating to the deterioration of the elastic member 19. Therefore,
The movable body 1 is not affected by the deterioration of the elastic members 18 and 19.
7 can be prevented from being displaced, whereby the initial performance can be maintained for a long period of time.

The mounting groove 17A of the abutment surface 17e
The elastic member 18 provided on the contact surface 17e and the stopper surface 9c
Is pressed between it and when elastically deformed in this manner large portions due to the elastic deformation is accommodated in the space S _1, the movable member 17 caused by the elastic member 18 to bulge onto the abutment surface 17e The displacement of the valve opening position can be prevented. Further, when the elastic member 19 provided in the mounting groove 17B of abutment surface 17f has been pressed elastically deformed between the abutment surface 17f and the seating face 11, large portions due to the elastic deformation is accommodated in the space S ₂ Therefore, the elastic member 19
Bulges onto the abutment surface 17f.
Of the valve closing position can be prevented.

Embodiment 2 Embodiment 2 will be described with reference to FIGS. The second embodiment is a partial modification of the first embodiment, and therefore the modified portion will be described in detail, and the description overlapping with the first embodiment will be omitted. FIG. 10 is a cross-sectional view of the movable body, and FIGS. 11 and 12 are partial cross-sectional views of a portion where the elastic member 18 is attached. FIG. 11 is a free state of the elastic member 18, and FIG. It is. As shown in FIGS. 10 and 11, in the present embodiment, the mounting groove 17A of the abutment surface 17e is provided.
Are open outward (upward in FIG. 11). Further, the convex portion 18a of the elastic member 18 is formed in a mountain-shaped cross section. Due to the groove surface of the mounting groove portion 17A and the inner and outer slopes (not shown) of the convex portion 18a, the elastic member 18 elastically deforms when the abutment surface 17e and the stopper surface 9c abut (see FIG. 12). It is provided a space S ₃ for accommodating the parts. In the present embodiment, substantially the same functions and effects as those of the first embodiment can be obtained.

The present invention is not limited to the above embodiment, but can be modified without departing from the scope of the present invention. For example, the elastic member 18 is provided on the abutment surface 17e.
In place of the stopper surface 9c or the abutment surface 1
7e and the stopper surface 9c can be provided on both contact surfaces. Further, the elastic member 19 is provided in place of the abutment surface 17f instead of the seating surface 1f.
1 or on both contact surfaces of the abutment surface 17f and the seating surface 11. Further, since the elastic member 18 does not need to have a sealing function, the elastic member 18 is not limited to an annular shape, and may have any shape. Also, the elastic member 19
If an elastic member dedicated to the seal is provided separately, the elastic member 19
Can also be of any shape.

[0035]

According to the present invention, the initial performance can be extended for a long time by reducing the operating noise, preventing the abutment surface from being worn, and preventing the movable member from being shifted from the restricted position due to the deterioration of the elastic member. Can be maintained over time.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a fuel injection valve according to a first embodiment.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a front view of a support spring.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a partially enlarged view of a portion B in FIG. 4;

FIG. 6 is a partial sectional view showing a free state of an elastic member on a valve closing side.

FIG. 7 is a partial sectional view showing a deformed state of the elastic member.

FIG. 8 is a partial cross-sectional view showing a free state of an elastic member on the valve opening side.

FIG. 9 is a partial sectional view showing a deformed state of the elastic member.

FIG. 10 is a sectional view of a movable body according to the second embodiment.

FIG. 11 is a partial cross-sectional view showing a free state of an elastic member on the valve opening side.

FIG. 12 is a partial sectional view showing a deformed state of the elastic member.

[Explanation of symbols]

4 Solenoid coil 9 Stopper member 9c Stopper surface (fixed-side contact surface) 10 Valve seat 11 Seat surface (fixed-side contact surface) 15 Injection valve body 17 Movable body 17e Abutment surface (movable-side abutment surface) 17f Abutment surface (movable side contact surface) 17A, 17B mounting groove 18, 19 elastic member 29 fuel passage S _1, S _2, S ₃ space

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI F02M 61/16 F02M 61/16 M

Claims (2)

[Claims] An injection valve body in which a solenoid coil is incorporated; a fuel passage formed in the injection valve body; and a movable body that opens and closes the fuel passage by an electromagnetic action of the solenoid coil. A fuel injection valve having a movable contact surface and a fixed contact surface that regulate the open / close position of the movable body by mutual contact when the movable body is opened / closed; An elastic member is provided for absorbing the impact of the movable contact surface against the fixed contact surface by elastic deformation, and the movable contact surface is brought into contact with the fixed contact surface after the elastic member is elastically deformed. A fuel injection valve characterized in that it is accessible. 2. The fuel injection valve according to claim 1, wherein a mounting groove is provided on the movable contact surface or the fixed contact surface, an elastic member is provided on the mounting groove, and a contact surface between the contact surfaces is provided. A fuel injection valve having a space capable of accommodating an enormous portion due to elastic deformation of an elastic member at the time of contact.