JP5987754B2 - Fuel injection valve - Google Patents

Description

  The present invention relates to a fuel injection valve.

  Conventionally, a valve body having a valve hole (hereinafter referred to as a valve body), a needle (hereinafter referred to as a valve body) provided inside the valve body so as to open and close the valve hole, and a valve from the outside of the valve body 2. Description of the Related Art There is known a fuel injection valve that includes an injection hole plate that covers a hole, and has an injection hole that penetrates in the thickness direction of the injection hole plate (see, for example, Patent Document 1).

  The nozzle hole has a channel cross-sectional area that increases from an opening end (inlet opening end) located on the valve body side to an opening end (exit opening end) located on the opposite side of the valve body. Is formed.

  In addition, the injection hole is formed such that the center of the exit opening end is located closer to the outer edge of the injection hole plate than the center of the entrance opening end in a plan view with respect to the injection hole plate.

JP 2002-221128 A

  However, by forming the channel cross-sectional shape of the nozzle hole so that the channel cross-sectional area increases from the inlet opening end to the outlet opening end, the fuel droplets sprayed from the nozzle hole to the outside Even when atomization is attempted, there is a problem that atomization of fuel droplets is difficult to be promoted if the spray range of fuel injected from each of the plurality of nozzle holes interferes.

  Therefore, the present invention has been made to solve the conventional problems as described above, and promotes atomization of fuel droplets injected from a plurality of nozzle holes to the outside as compared with the conventional one. The object is to provide a fuel injection valve.

In order to solve the above-described object, the fuel injection valve according to the present invention includes (1) a valve body having a valve hole, a valve body provided inside the valve body so as to open and close the valve hole, and the valve hole. and a nozzle hole plate provided in the valve body so as to cover, in the injection hole plate, a fuel injection valve in which a plurality form nozzle holes which penetrate in the plate thickness direction, the injection hole, and the entry side opening end and an exit-side opening end portion, the flow path cross-section of said injection hole, in a plan view with respect to the injection hole plate is formed in an oval shape having a first and second axes that intersect each other, the entering The first axis belonging to the side opening end and the first axis belonging to the exit opening end are parallel to each other, and the second axis belonging to the entry opening end and the exit opening end The first axis belonging to the inlet opening end of the nozzle hole is parallel to the second axis belonging to the nozzle The axis is a major axis, the second axis belonging to the inlet opening end is a minor axis, the first axis belonging to the outlet opening end of the nozzle hole is a minor axis, and the outlet opening The second axis belonging to the end is a long axis, and the center of the exit opening that is the intersection of the first axis and the second axis at the exit opening end is the entrance opening. The exit side open end is formed so as to be located on the outer edge side of the nozzle hole plate with respect to the center of the entrance side open end that is the intersection of the first axis and the second axis at the end. The direction of the axis of the nozzle hole, which is a line connecting the center of the inlet and the center of the inlet opening end, is such that the outer edge portions adjacent to each other in the spray range of fuel injected from each of the nozzle holes are in the fuel injection direction The configuration is set so as to be arranged in parallel with each other.

  With this configuration, the fuel injection valve of the present invention sets the direction of the axis of the nozzle hole so that the outer edge portions adjacent to each other are aligned in parallel to the fuel injection direction in the spray range of the fuel injected from each of the nozzle holes. Therefore, the spray range of the fuel injected from each of the plurality of nozzle holes does not interfere, and atomization of the fuel droplets can be promoted.

  In the fuel injection valve described in (1) above, (2) the flow passage cross section of the nozzle hole is located on the opposite side of the valve body from the inlet opening end located on the valve body side. It is good also as a structure formed in the taper shape so that a flow-path cross-sectional area may become large toward an opening edge part.

  With this configuration, the fuel injection valve of the present invention can expand the range in which the fuel diffuses with respect to the fuel that is injected from the nozzle hole to the outside.

  Further, in the fuel injection valve according to the above (1) or (2), (3) the nozzle hole is relatively in a cross section along the first axis of the inlet side opening end and the outlet side opening end. The second angle formed by the opposed inner wall surface portions in the section along the second axis of the inlet side opening end portion and the outlet side opening end portion is larger than the first angle formed by the inner wall surface portion to be formed. It is good also as a formed structure.

  With this configuration, the fuel injection valve of the present invention has an inlet opening end that is more than the first angle formed by the opposed inner wall surfaces in the section along the first axis of the inlet opening end and the outlet opening end. Since the second angle formed by the opposed inner wall surfaces in the cross section along the second axis of the portion and the outlet opening end is larger, the fuel injected from the nozzle hole to the outside is discharged. While expanding in the second axial direction of the side opening end, air is drawn from the outside of the valve body into the inside of the injection hole in response to fuel injection.

  Therefore, the fuel injection valve of the present invention reduces the thickness of the fuel liquid film in the first axial direction of the outlet opening end portion of the fuel injected from the nozzle hole to the outside, and removes the fuel liquid film from the outlet side. It can expand sufficiently in the second axial direction of the opening end, and can effectively promote atomization of fuel droplets.

  In the fuel injection valve according to (1) to (3) above, (4) the center of the outlet opening end of the nozzle hole is the entrance of the nozzle hole in a plan view with respect to the nozzle hole plate. It is good also as a structure set so that it may not overlap with any of the 1st axis | shaft of a side opening edge part, and a 2nd axis | shaft.

  With this configuration, the fuel injection valve of the present invention has the center of the outlet opening end of the nozzle hole in the plan view with respect to the nozzle hole plate, the first axis and the second axis of the inlet opening end of the nozzle hole. Since it is set so as not to overlap any of the shafts, the atomized fuel is sprayed in an asymmetrical range around the axis of the nozzle hole.

  Therefore, in the fuel injection valve of the present invention, the spray range of the fuel injected from each of the plurality of injection holes does not interfere and can effectively promote atomization of the fuel droplets.

  According to the present invention, it is possible to provide a fuel injection valve that can promote atomization of fuel droplets injected from a plurality of nozzle holes to the outside as compared with the conventional one.

It is a schematic diagram which shows the structure of the fuel injection valve which concerns on the 1st Embodiment of this invention, Fig.1 (a) is sectional drawing of the front-end | tip part of a fuel injection valve, FIG.1 (b) is FIG.1 (a). FIG. 1C is a C1 direction view of FIG. 1A, and FIG. 1D is a D1-D1 cross-sectional view of FIG. 1C. It is a schematic diagram which shows the effect | action of the fuel injection valve which concerns on the 1st Embodiment of this invention. It is a schematic diagram which shows the spray range of the fuel in the fuel injection valve which concerns on the 1st Embodiment of this invention, Fig.3 (a) is a side view of an injection hole plate, FIG.3 (b) is an injection hole plate. A bottom view and FIG. 3C are graphs showing the fuel particle size distribution. It is a schematic diagram which shows the structure of the fuel injection valve which concerns on the 2nd Embodiment of this invention, Fig.4 (a) is a longitudinal cross-sectional view of the front-end | tip part of a fuel injection valve, FIG.4 (b) is FIG.4 (a). 4B is a view in the B2 direction, FIG. 4C is a view in the C2 direction in FIG. 4A, and FIG. 4D is a cross-sectional view along D2-D2 in FIG. It is a schematic diagram which shows the spraying range of the fuel in the fuel injection valve which concerns on the 2nd Embodiment of this invention, Fig.5 (a) is a side view of an injection hole plate, FIG.5 (b) is an injection hole plate. A bottom view and FIG. 5C are graphs showing the fuel particle size distribution.

  Hereinafter, embodiments of a fuel injection valve according to the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIGS. 1A and 2, the fuel injection valve 1 according to the first embodiment includes a valve body 10, a valve body 20, and an injection hole plate 30, and the injection hole plate 30 has a plate thickness. A plurality of nozzle holes 31 penetrating in the direction are formed.

  The valve body 10 is a hollow structure, and has a fuel supply passage 11 extending vertically and a valve hole 12 that communicates with a lower end portion of the fuel supply passage 11 and opens downward. A fuel pressurized by a pump (not shown) is supplied to the fuel supply passage 11. The inner peripheral surface portion of the valve hole 12 is formed so that the inner diameter thereof decreases in a tapered shape toward the lower side, and serves as a valve seat 13.

  The valve body 20 is a rod-like body extending in the vertical direction, and is disposed coaxially inside the valve body 10. The lower end portion of the valve body 20 is formed so that the outer diameter decreases in a tapered shape downward. The entire circumference of the tapered portion having the largest outer diameter is in contact with the valve seat 13 of the valve body 10 as a seal portion 21.

  The valve body 20 is moved in the vertical direction by a valve driving device including a spring and a solenoid coil (not shown) to open and close the valve hole 12 of the valve body 10.

  The spring plays a role of pressing the valve body 20 downward against the valve body 10. That is, when the solenoid coil is not excited, the valve body 20 is pressed downward by the restoring force of the spring, and the seal portion 21 is in contact with the valve seat 13 of the valve body 10. Communication between the valve 11 and the valve hole 12 is cut off.

  The solenoid coil plays a role of pulling up the valve body 20 against the restoring force of the spring. That is, when the solenoid coil is excited, the valve body 20 is pulled up by the magnetic attractive force, and the seal portion 21 is separated from the valve seat 13 of the valve body 10, so that the fuel supply passage 11 and the valve hole 12 Will communicate.

  The nozzle hole plate 30 is attached to the lower end portion of the valve body 10 by welding or the like so as to cover the valve hole 12.

  The nozzle hole 31 is formed in an oval shape in which the cross section of the flow path has first axes X1 and X2 and second axes Y1 and Y2 in a plan view with respect to the nozzle hole plate 30 shown in FIG.

  In FIG. 1B and FIG. 1C, the first axes X1 and X2 are major axes, and the second axes Y1 and Y2 are minor axes. The first axis X1 and the second axis Y1 belong to the inlet side opening end portion 31a located on the valve body 10 side (upper side in the drawing) in the injection hole 31, and the first axis X2 and the second axis Y1 The axis Y2 belongs to the outlet opening end 31b located on the opposite side (lower side in the drawing) of the valve body 10 in the nozzle hole 31.

  In each of the embodiments described below, the oval shape is not limited to a closed curve that is axisymmetric about at least one axis, such as an ellipse, an oval, an oval, etc. It also includes closed curves that are not.

  The nozzle hole 31 is formed in a tapered shape so that the cross-sectional area of the flow path increases from the inlet opening end 31a to the outlet opening end 31b. The nozzle hole 31 has a center (first axis X2 and second axis) of the outlet side opening end portion 31b rather than the center of the inlet side opening end portion 31a (intersection of the first axis X1 and the second axis Y1). (The intersection with Y2) is formed so as to be located on the outer edge side of the nozzle hole plate 30.

  The nozzle hole 31 is formed by opposed inner wall surface portions 31c and 31d in a longitudinal section (see FIG. 1A) along the first axes X1 and X2 of the inlet side opening end portion 31a and the outlet side opening end portion 31b. Compared to the first angle θ1, in an oblique cross section (see FIGS. 1C and 1D) along the second axes Y1 and Y2 of the inlet side opening end portion 31a and the outlet side opening end portion 31b. The second angle θ2 formed by the opposing inner wall surface portions 31e and 31f is formed to be large. In the figure, Z represents the axis of the nozzle hole 31.

  The direction of the axis Z of the injection hole 31 is the closest part at the outer edge of the spray range P of the fuel injected toward the outside of the injection hole plate 30, as shown in FIGS. 3 (a) and 3 (b). Are arranged in parallel to each other.

  Next, the operation of the fuel injection valve 1 according to the present embodiment will be described with reference to FIGS. In FIG. 2, F represents the flow of fuel, A represents the flow of air, Lf1, Lf2, Lf3, and Lf4 represent fuel liquid film cross sections, Lg represents fuel droplets, and h represents the thickness of the fuel liquid film.

  The fuel injection valve 1 performs fuel injection in a state where fuel is supplied to a fuel supply passage 11 of the valve body 10 from a pump (not shown). When the valve body 20 is pulled up by a valve driving device (not shown), the fuel injection valve 1 causes the fuel in the fuel supply passage 11 to pass through the gap between the valve seat 13 and the outer peripheral surface portion of the lower end portion of the valve body 20, and the valve hole. 12 is caused to flow into the nozzle hole 31 and sprayed downward from the outlet side opening end 31b of the nozzle hole 31 to the outside.

  As a result, the fuel in the fuel supply passage 11 flows into the injection hole 31 through the gap between the valve seat 13 and the outer peripheral surface portion of the lower end portion of the valve body 20 and the valve hole 12, and from the injection hole 31 to the fuel injection valve 1. Injected downward.

  The fuel injection valve 1 causes a loss of pressure by the valve seat 13, the valve body 20 and the injection hole plate 30 with respect to the fuel traveling from the fuel supply passage 11 to the injection hole 31, thereby causing a disturbance in the fuel flow F, When it flows into the injection hole 31 from the entrance side opening end part 31a, it flows into the inner wall surface part 31c of the injection hole 31 so as to be dense, thereby causing boundary layer separation.

  As the fuel injected from the fuel injection valve 1 moves away from the outlet opening end 31b, the fuel liquid film cross section expands from Lf1 to Lf2, but the fuel droplet Lg diffuses from the fuel mainstream. The fuel liquid film cross section is reduced from Lf2 to Lf3 and Lf4, and finally the fuel liquid film cross section is eliminated.

  The relationship expressed by the following equation (1) is established between the particle size PS of the fuel droplet Lg and the thickness h of the fuel liquid film. This equation is called the FRAZER equation.

Pd = C (h / V ² ) ^1/3 (1)
Here, V: fuel flow velocity, C: coefficient.

  In the fuel injection valve 1 according to the present embodiment, the nozzle holes 31 of the nozzle hole plate 30 are relatively positioned in a longitudinal section along the first axes X1 and X2 of the inlet side opening end portion 31a and the outlet side opening end portion 31b. Compared to the first angle θ1, which is the crossing angle of the inner wall surface portions 31c and 31d, the inner walls facing each other in the oblique section along the second axes Y1 and Y2 of the inlet side opening end portion 31a and the outlet side opening end portion 31b The second angle θ2, which is the intersection angle of the surface portions 31e and 31f, is formed to be large.

  For this reason, the fuel injection valve 1 can inject fuel downward from the injection hole 31 so as to expand in the direction of the second axis Y2 of the outlet opening end 31b. The fuel injection valve 1 causes dense fuel to flow through the inner wall surface portion 31c of the injection hole 31 to generate F, and generates a negative pressure in a region on the inner wall surface portion 31d side inside the injection hole 31. The flow A of external air can be entrained in the interior of 31.

  Therefore, the fuel injection valve 1 reduces the thickness h of the fuel liquid film in the direction of the first axis X2 of the outlet opening end 31b for the fuel injected from the injection hole 31 and removes the fuel liquid film. The side opening end portion 31b can be sufficiently expanded in the second axis Y2 direction to effectively promote atomization of the fuel droplets.

  In the fuel injection valve 1 according to the present embodiment, the outer edge portions adjacent to each other in the spray range P of the fuel injected from each of the nozzle holes 31 in the direction of the axis Z of the nozzle hole 31 of the nozzle hole plate 30 are fuel. It is set to line up in parallel with the injection direction.

  For this reason, as shown in FIGS. 3A and 3B, the fuel injection valve 1 has a spray range of fuel injected from each injection hole 31 in a side view and a bottom view of the injection hole plate 30. Without making P interfere, as shown in FIG. 3C, atomization Lg of the fuel droplets can be promoted.

  In addition, since the spray ranges P of the fuel injected from the respective injection holes 31 do not interfere with each other, the influence of air acting on the fuel droplets Lg flowing through the outer edge portion of the adjacent spray range P is reduced, and the fuel droplets Lg are reduced. Then, it is wound up in the direction of arrow S shown in FIG. As a result, the fuel droplets Lg are further atomized.

(Second Embodiment)
As shown in FIG. 4A, the fuel injection valve 2 according to the second embodiment includes a valve body 10, a valve body 20, and an injection hole plate 30, and penetrates the injection hole plate 30 in the plate thickness direction. A plurality of nozzle holes 32 are formed.

  The basic structure of the valve body 10, the valve body 20, and the nozzle hole plate 30 is the same as that of the first embodiment described above, and in FIGS. 4 (a) to 4 (d), FIGS. The parts denoted by the same reference numerals as (d) represent the same thing.

  The nozzle hole 32 is formed in an oval shape in which the cross section of the flow path has first axes X1 and X2 and second axes Y1 and Y2 in a plan view with respect to the nozzle hole plate 30 shown in FIG.

Shown in FIG. 4 (b) and FIG. 4 (c), the first axis X1, a second axis Y2 is the long axis, the first axis X2, the second axis Y1 is the minor axis. The first axis X1 and the second axis Y1 belong to the inlet side opening end portion 32a located on the valve body 10 side (the upper side in the drawing) in the injection hole 32, and the first axis X2 and the second axis Y1 The axis Y2 belongs to the outlet opening end 32b located on the opposite side (lower side in the figure) of the valve body 10 in the nozzle hole 32.

  The nozzle hole 32 is formed in a taper shape so that the flow path cross-sectional area increases from the inlet side opening end portion 32a toward the outlet side opening end portion 32b. The nozzle hole 32 has a center (first axis X2 and second axis) of the outlet side opening end portion 32b rather than the center of the inlet side opening end portion 32a (intersection of the first axis X1 and the second axis Y1). (The intersection with Y2) is formed so as to be located on the outer edge side of the nozzle hole plate 30.

Further, the center of the outlet side opening end portion 32b is set so as not to overlap any of the first axis X1 and the second axis Y1 belonging to the inlet side opening end portion 32a in a plan view with respect to the nozzle hole plate 30. Yes.

  The injection hole 32 is formed by opposed inner wall surface portions 32c and 32d in an oblique cross section (see FIG. 4A) along the first axes X1 and X2 of the inlet side opening end portion 32a and the outlet side opening end portion 32b. Compared to the first angle θ1, in the oblique cross section (see FIGS. 4C and 4D) along the second axes Y1 and Y2 of the entrance side opening end portion 32a and the exit side opening end portion 32b. The second angle θ2 formed by the opposing inner wall surface portions 32e and 32f is formed to be large. In the figure, Z represents the axis of the nozzle hole 32.

  The direction of the axis Z of the injection hole 32 is the closest part at the outer edge of the spray range P of the fuel injected toward the outside of the injection hole plate 30, as shown in FIGS. 5 (a) and 5 (b). Are arranged in parallel to each other.

  Next, the operation of the fuel injection valve 2 according to the present embodiment will be described. Since the basic operation of the fuel injection valve 2 is the same as that of the first embodiment described above, description thereof is omitted.

  The fuel injection valve 2 performs fuel injection in a state where fuel is supplied from a pump (not shown) to the fuel supply passage 11 of the valve body 10. When the valve body 20 is pulled up by a valve driving device (not shown), the fuel injection valve 2 causes the fuel in the fuel supply passage 11 to pass through the gap between the valve seat 13 and the outer peripheral surface portion of the lower end portion of the valve body 20, and the valve hole. 12 is caused to flow into the nozzle hole 32, and sprayed outwardly from the outlet side opening end 32 b of the nozzle hole 32.

  Thus, the fuel in the fuel supply passage 11 flows into the injection hole 32 through the gap between the valve seat 13 and the outer peripheral surface portion of the lower end portion of the valve body 20 and the valve hole 12, and from the injection hole 32 to the fuel injection valve 1. Injected downward.

  The fuel injection valve 1 causes a loss of pressure by the valve seat 13, the valve body 20 and the injection hole plate 30 with respect to the fuel traveling from the fuel supply passage 11 to the injection hole 32, thereby causing a turbulence in the fuel flow F. When it flows into the injection hole 32 from the entrance side opening end part 31a, it flows into the inner wall surface part 31c of the injection hole 31 so as to be dense, thereby causing boundary layer separation.

  As the fuel injected from the fuel injection valve 2 moves away from the outlet opening end 32b, the fuel liquid film cross section expands. However, since fuel droplets diffuse from the fuel mainstream, the fuel liquid film cross section It gradually shrinks and eventually eliminates the fuel film cross section.

  In the fuel injection valve 2 according to the present embodiment, the injection hole 32 of the injection hole plate 30 is relatively opposed to each other in the oblique cross section along the first axes X1 and X2 of the inlet side opening end part 32a and the outlet side opening end part 32b. Compared to the first angle θ1, which is the crossing angle of the inner wall surface portions 32c, 32d, the inner walls are opposed to each other in the oblique cross section along the second axes Y1, Y2 of the inlet side opening end portion 32a and the outlet side opening end portion 32b. The second angle θ2, which is the intersection angle of the surface portions 32e and 32f, is formed to be large.

  For this reason, the fuel injection valve 2 can inject the fuel downward from the injection hole 32 so as to expand in the direction of the second axis Y2 of the outlet opening end 32b. Further, the fuel injection valve 2 causes a dense fuel to flow F at the inner wall surface portion 32c of the nozzle hole 32, thereby generating a negative pressure in a region on the inner wall surface portion 32d side inside the nozzle hole 32. The flow A of external air can be entrained in the interior of 32.

  Therefore, the fuel injection valve 2 reduces the thickness h (see FIG. 2) of the fuel liquid film in the first axis X2 direction of the outlet opening end portion 32b for the fuel injected from the injection hole 32 to the outside. The fuel liquid film can be sufficiently expanded in the direction of the second axis Y2 of the outlet opening end portion 32b, and atomization of fuel droplets can be effectively promoted.

  The fuel injection valve 2 according to the present embodiment has a first axis X1 and a second axis Y2 belonging to the inlet opening end 32a in the plan view with respect to the nozzle hole plate 30, with the center of the outlet opening end 32b. It is set not to overlap any of the above.

  Therefore, the fuel injection valve 2 causes the atomized fuel to flow into the oblique cross-section (see FIG. 5 (d)) along the second axes Y1 and Y2 of the inlet side opening end portion 32a and the outlet side opening end portion 32b. Spraying is performed in an asymmetrical range around the axis Z of the nozzle hole 32.

  In the fuel injection valve 2 according to the present embodiment, the direction of the axis Z of the injection hole 32 of the injection hole plate 30 is such that the outer edge portions adjacent to each other in the spray range P of the fuel injected from each of the injection holes 32 are fuel. It is set to line up in parallel with the injection direction.

  For this reason, as shown in FIGS. 5A and 5B, the fuel injection valve 2 has a spray range of fuel injected from each nozzle hole 32 in a side view and a bottom view of the nozzle hole plate 30. As shown in FIG. 5C, atomization of fuel droplets can be promoted without causing P to interfere.

  Further, since the spray ranges P of the fuel injected from the respective injection holes 32 do not interfere with each other, the influence of air acting on the fuel droplets flowing through the outer edge portion of the adjacent spray range P is reduced, and the fuel droplets are It is wound up in the direction of arrow S shown in FIG. As a result, the fuel droplets are further atomized.

  It should be noted that the technical scope of the fuel injection valve according to the present invention is not limited to the above-described embodiment, and various components of the constituent elements described in the claims can be made without departing from the scope of the present invention. Includes changes.

  As described above, the fuel injection valve according to the present invention has an effect of promoting atomization of fuel droplets injected from a plurality of nozzle holes to the outside, and is useful for various internal combustion engines.

  DESCRIPTION OF SYMBOLS 1, 2 ... Fuel injection valve, 10 ... Valve body, 12 ... Valve hole, 20 ... Valve body, 30 ... Injection hole plate, 31, 32 ... Injection hole, 31a, 32a ... Inlet side opening end part, 31b, 32b ... Outlet opening end, 31c, 32c ... inner wall surface portion, 31d, 32d ... inner wall surface portion, 31e, 32e ... inner wall surface portion, 31f, 32f ... inner wall surface portion, P ... spraying range, X1, X2 ... first axis, Y1, Y2 ... second axis, Z ... axis, θ1 ... first angle, θ2 ... second angle

Claims (4)

A valve body having a valve hole;
A valve body provided inside the valve body to open and close the valve hole;
An injection hole plate provided in the valve body so as to cover the valve hole,
A fuel injection valve in which a plurality of injection holes penetrating in the plate thickness direction is formed in the injection hole plate,
The nozzle hole has an inlet opening end and an outlet opening end,
The flow passage cross section of the nozzle hole is formed in an oval shape having a first axis and a second axis intersecting each other in a plan view with respect to the nozzle hole plate,
The first axis belonging to the entry-side opening end and the first axis belonging to the exit-side opening end are parallel,
The second axis belonging to the entry-side opening end and the second axis belonging to the exit-side opening end are parallel,
The first axis belonging to the inlet side opening end of the nozzle hole is a long axis, and the second axis belonging to the inlet side opening end is a short axis,
The first axis belonging to the outlet side opening end of the nozzle hole is a short axis, and the second axis belonging to the outlet side opening end is a long axis,
The center of the outlet opening that is the intersection of the first axis and the second axis at the outlet opening end is the first axis and the second axis at the inlet opening end. Is formed so as to be located on the outer edge side of the nozzle hole plate from the center of the entrance-side opening end that is the intersection with
The direction of the axis of the nozzle hole, which is a line connecting the center of the outlet opening end and the center of the inlet opening end, is an outer edge adjacent to each other in the spray range of fuel injected from each of the nozzle holes A fuel injection valve characterized in that the portion is set so as to be aligned in parallel to the fuel injection direction.   The flow passage cross section of the nozzle hole is tapered so that the cross sectional area of the flow passage increases from the inlet opening end located on the valve body side to the outlet opening end located on the opposite side of the valve body. The fuel injection valve according to claim 1, wherein the fuel injection valve is formed.   The injection hole has a width greater than a first angle formed by opposing inner wall surfaces in a cross section along the first axis of the entry side opening end and the exit side opening end. 3. The fuel injection according to claim 1, wherein the second angle formed by the opposed inner wall surface portions in the cross section along the second axis of the side opening end portion is formed to be larger. valve.   The center of the outlet opening end of the nozzle hole does not overlap with either the first axis or the second axis of the inlet opening end of the nozzle hole in a plan view with respect to the nozzle hole plate. The fuel injection valve according to any one of claims 1 to 3, wherein the fuel injection valve is set.

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