JP7644672B2 - Fuel injection valve - Google Patents

Description

The present invention relates to a fuel injection valve that generates swirling fuel upstream of a fuel injection hole and injects the swirling fuel from the fuel injection hole.

The fuel injection valve described in International Publication No. 2018/198309 (Patent Document 1) is known as background art of this technical field. This fuel injection valve has multiple nozzle holes inclined in one of two directions, which are the fuel injection directions inclined with respect to the axis of the fuel injection valve (see paragraphs 0008, 0009, 0014 and Figures 2 and 3). This fuel injection valve employs a method of atomizing sprayed fuel using a swirling flow, and is structured so that the inlet center of the nozzle hole is offset from the swirling center in consideration of the inclination of the nozzle hole, and the film thickness of the liquid film of fuel swirling at the outlet of the nozzle hole is made uniform, thereby promoting atomization of the injected fuel (see paragraph 0021).

International Publication No. 2018/198309

The fuel injection valve in Patent Document 1 takes into consideration the use of swirling flow to promote atomization of the injected fuel, but the fuel injected from the nozzle outlet spreads over a wide angle, and the fuel sprays injected in two different directions overlap, resulting in sprays that are poorly separated. For example, if such a fuel injection valve is used in a system that injects fuel toward two intake ports, the amount of fuel adhering to the central bulkhead of the intake ports will increase.

The object of the present invention is to provide a fuel injection valve that injects swirling fuel from multiple fuel injection holes, which suppresses the overlap of fuel sprays injected in two different directions from the multiple fuel injection holes and improves the separation of the sprays.

In order to achieve the above object, the fuel injection valve of the present invention comprises:
a plurality of first fuel injection holes including a plurality of fuel injection holes which inject fuel by directing in one of two different directions, and a plurality of fuel injection holes which inject fuel by directing in the other of the two directions;
a plurality of first swirl chambers disposed upstream of the plurality of first fuel injection holes and configured to impart a swirling force to fuel supplied to the first fuel injection holes;
a plurality of first lateral passages for supplying fuel to each of the plurality of first swirl chambers;
a plurality of second fuel injection holes including a fuel injection hole which injects fuel by directing in one of the two directions and a fuel injection hole which injects fuel by directing in the other of the two directions;
a nozzle plate in which the first fuel injection holes, the first swirl chambers, the first lateral passages, and the second fuel injection holes are formed;
Equipped with
the first fuel injection hole which injects fuel in the one direction and the second fuel injection hole which injects fuel in the one direction are disposed in one of two sections which are partitioned by a first line segment passing through a center of the nozzle plate,
the first fuel injection hole which injects fuel while pointing in the other direction and the second fuel injection hole which injects fuel while pointing in the other direction are disposed in the other of the two sections partitioned by the first line segment,
the second fuel injection hole which injects fuel in the one direction is disposed between the first fuel injection holes which inject fuel in the one direction,
the second fuel injection hole which injects fuel in the other direction is disposed between the first fuel injection holes which inject fuel in the other direction,
the second fuel injection hole which injects fuel in the one direction and the plurality of first fuel injection holes which inject fuel in the one direction are arranged in a straight line,
the second fuel injection hole which injects fuel in the one direction is disposed intermediate the first fuel injection holes which inject fuel in the one direction,
the second fuel injection hole which injects fuel while pointing in the other direction and the plurality of first fuel injection holes which inject fuel while pointing in the other direction are arranged on a straight line,
The second fuel injection hole which injects fuel while being directed in the other direction is disposed intermediate the plurality of first fuel injection holes which inject fuel while being directed in the other direction .
In order to achieve the above object, the fuel injection valve of the present invention comprises:
a plurality of first fuel injection holes including a plurality of fuel injection holes which inject fuel by directing in one of two different directions, and a plurality of fuel injection holes which inject fuel by directing in the other of the two directions;
a plurality of first swirl chambers disposed upstream of the plurality of first fuel injection holes and configured to impart a swirling force to fuel supplied to the first fuel injection holes;
a plurality of first lateral passages for supplying fuel to each of the plurality of first swirl chambers;
a plurality of second fuel injection holes including a fuel injection hole which injects fuel by directing in one of the two directions and a fuel injection hole which injects fuel by directing in the other of the two directions;
a nozzle plate in which the first fuel injection holes, the first swirl chambers, the first lateral passages, and the second fuel injection holes are formed;
Equipped with
the first fuel injection hole which injects fuel in the one direction and the second fuel injection hole which injects fuel in the one direction are disposed in one of two sections which are partitioned by a first line segment passing through a center of the nozzle plate,
the first fuel injection hole which injects fuel while pointing in the other direction and the second fuel injection hole which injects fuel while pointing in the other direction are disposed in the other of the two sections partitioned by the first line segment,
the second fuel injection hole which injects fuel in the one direction is disposed between the first fuel injection holes which inject fuel in the one direction,
the second fuel injection hole which injects fuel in the other direction is disposed between the first fuel injection holes which inject fuel in the other direction,
the second fuel injection hole which injects fuel while being directed in the one direction is disposed radially outward with respect to a line segment connecting the plurality of first fuel injection holes which inject fuel while being directed in the one direction,
The second fuel injection hole which injects fuel while being directed in the other direction is disposed radially outward with respect to a line segment connecting the plurality of first fuel injection holes which inject fuel while being directed in the other direction.

According to the present invention, in a fuel injection valve that injects swirling fuel from multiple fuel injection holes, it is possible to suppress the overlap of fuel sprays injected in two different directions from multiple fuel injection holes, thereby improving the separation of the sprays.

1 is a vertical cross-sectional view showing a cross section along a central axis 1a of a fuel injection valve 1 according to the present invention. 2 is an enlarged longitudinal sectional view (corresponding to the cross section taken along the line II-II in FIG. 3) showing the vicinity of the valve portion and the fuel injection portion (nozzle portion 8) of the fuel injection valve 1 in FIG. 1. 3 is a view taken along the line III-III in FIG. 1, and is a plan view illustrating only the nozzle plate 21n. 2 is an enlarged plan view showing a swirl chamber 212 and a fuel injection hole 220. FIG. 10 is a conceptual diagram showing the relationship between the fuel spray injected from the first fuel injection holes 220-1, 220-2 and the fuel spray injected from the second fuel injection hole 320-1. FIG. 2 is a conceptual diagram showing the arrangement of fuel sprays on a plane perpendicular to a central axis 1a of the fuel injection valve 1. FIG. 4 is a plan view similar to FIG. 3, showing a first modified example of the nozzle plate 21n. FIG. 8 is a conceptual diagram showing the arrangement of fuel sprays in the nozzle plate 21n shown in FIG. 7. FIG. 5 is a plan view similar to FIG. 3, showing a second modified example of the nozzle plate 21n. 10 is a conceptual diagram showing the arrangement of fuel sprays in the nozzle plate 21n shown in FIG. 9. FIG. 5 is a plan view similar to FIG. 3, showing a third modified example of the nozzle plate 21n. FIG. 7 is a plan view similar to FIG. 3, showing a fourth modified example of the nozzle plate 21n. 1 is a cross-sectional view of an internal combustion engine equipped with a fuel injection valve.

The following describes an embodiment of the present invention with reference to the drawings. In the following description of the embodiment and modified examples, similar components are given the same reference numerals to avoid redundant description.

The overall configuration of the fuel injection valve 1 will be described with reference to Figure 1. Figure 1 is a vertical cross-sectional view showing a cross section along the central axis 1a of the fuel injection valve 1 according to this embodiment. The central axis 1a coincides with the axis (valve axis) of the movable element 27 with which the valve body 17 described below is integrally provided, and coincides with the central axis of the cylindrical body 5 described below. The central axis 1a also coincides with the central axis of the valve seat 15b described below. The central axis and the axis (valve axis) described above will not be distinguished from each other, and will be described as the central axis 1a.

The fuel injection valve 1 is provided with a cylindrical body 5 made of a metal material that extends from the upper end to the lower end. Inside this cylindrical body 5, the fuel flow path 3 is configured to be approximately along the central axis 1a. In FIG. 1, the upper end (upper end side) is called the base end (base end side), and the lower end (lower end side) is called the tip end (tip side). The names of the base end (base end side) and the tip end (tip side) are based on the fuel flow direction. That is, in the fuel flow direction, the base end side is the upstream side, and the tip side is the downstream side. In addition, the vertical relationship used in this specification is based on FIG. 1, and has no relation to the vertical direction when the fuel injection valve 1 is installed in the internal combustion engine.

A fuel supply port 2 is provided at the base end of the cylindrical body 5. A fuel filter 13 is attached to this fuel supply port 2. The fuel filter 13 is a component for removing foreign matter that has become mixed in with the fuel.

An O-ring 11 is disposed at the base end of the cylindrical body 5. The O-ring 11 functions as a seal when the fuel injection valve 1 is connected to the fuel pipe.

At the tip of the cylindrical body 5, a valve section 7 is formed, which is composed of a valve body 17 and a valve seat member 15. The valve seat member 15 is formed with a stepped valve body accommodating hole 15a that accommodates the valve body 17. A conical surface is formed in the middle of the valve body accommodating hole 15a, and a valve seat 15b is formed on this conical surface. A guide surface 15c that guides the movement of the valve body 17 in a direction along the central axis 1a is formed in the part of the valve body accommodating hole 15a upstream (base end side) of the valve seat 15b of the valve body accommodating hole 15a. The valve seat 15b and the valve body 17 cooperate to open and close the fuel passage. The fuel passage is closed when the valve body 17 abuts against the valve seat 15b. The fuel passage is opened when the valve body 17 moves away from the valve seat 15b.

The valve seat member 15 is inserted into the inside of the tip side of the cylindrical body 5 and fixed to the cylindrical body 5 by laser welding. Laser welding 19 is performed from the outer periphery side of the cylindrical body 5 around the entire circumference. The valve body accommodating hole 15a penetrates the valve seat member 15 in the direction along the central axis 1a. A nozzle plate 21n is attached to the lower end surface (tip surface) of the valve seat member 15. The nozzle plate 21n closes the opening of the valve seat member 15 formed by the valve body accommodating hole 15a.

In this embodiment, the nozzle portion 21 that injects swirling fuel is formed by the valve seat member 15 and the nozzle plate 21n. The nozzle plate 21n is fixed to the valve seat member 15 by laser welding. The laser welded portion 23 goes around the periphery of the injection hole forming region, surrounding the injection hole forming region where the fuel injection holes 220-1, 220-2, 220-3, 220-4 (see FIG. 3) are formed. The valve seat member 15 may be press-fitted into the inside of the tip side of the cylindrical body 5 and then fixed to the cylindrical body 5 by laser welding.

In this embodiment, the valve body 17 is a ball valve having a spherical shape. For this reason, a plurality of cutout surfaces 17a are provided at intervals in the circumferential direction at the portion of the valve body 17 facing the guide surface 15c. These cutout surfaces 17a form a gap between them and the inner peripheral surface of the plate seat member 15. This gap forms a fuel passage. It is possible to configure the valve body 17 with a valve other than a ball valve. For example, a needle valve may be used.

In this embodiment, the valve portion 7 including the valve seat member 15 and the valve body 17 and the nozzle plate 21n constitute the fuel injection portion 8 for injecting fuel.

A drive unit 9 for driving the valve body 17 is disposed in the middle of the cylindrical body 5. The drive unit 9 is composed of an electromagnetic actuator. Specifically, the drive unit 9 is composed of a fixed core 25, a mover (movable member) 27, an electromagnetic coil 29, and a yoke 33.

The fixed core 25 is made of a magnetic metal material and is press-fitted into the inside of the longitudinal middle part of the cylindrical body 5. The fixed core 25 is formed in a cylindrical shape and has a through hole 25a that passes through the center in the direction along the central axis 1a. The fixed core 25 may be fixed to the cylindrical body 5 by welding, or may be fixed to the cylindrical body 5 by a combination of welding and press-fitting.

The movable element 27 is disposed inside the cylindrical body 5 on the tip side of the fixed core 25. The movable element 27 has a movable core 27a at the base end side. The movable core 27a faces the fixed core 25 with a minute gap δ therebetween. A small diameter portion 27b is formed at the tip side of the movable element 27, and the valve body 17 is fixed to the tip of the small diameter portion 27b by welding. In this embodiment, the movable core 27a and the connection portion 27b are integrally formed (as one member made of the same material), but they may be formed by joining two different members. The movable element 27 displaces the valve body 17, which is integrally formed, in the valve opening/closing direction. The valve body 17 comes into contact with the valve seat member 15, and the outer peripheral surface of the movable core 27a comes into contact with the inner peripheral surface of the cylindrical body 5, so that the movement of the movable element 27 in the direction along the central axis 1a (valve opening/closing direction) is guided at two points in the valve axis direction.

A recess 27c is formed on the end surface of the movable core 27a facing the fixed core 25. A spring seat 27e for a spring (coil spring) 39 is formed on the bottom surface of the recess 27c. A through hole 27f is formed on the inner periphery of the spring seat 27e, penetrating along the central axis 1a to the tip end of the small diameter portion (connection portion) 27b. An opening 27d is formed on the side surface of the small diameter portion 27b. The through hole 27f opens on the bottom surface of the recess 27c, and the opening 27d opens on the outer periphery of the small diameter portion 27b, thereby forming a fuel flow path 3 that communicates with the fuel passage 3 formed in the fixed core 25 and the valve portion 7.

The electromagnetic coil 29 is fitted around the outer periphery of the cylindrical body 5 at a position where the fixed core 25 and the movable core 27a face each other with a minute gap δ between them. The electromagnetic coil 29 is wound around a bobbin 31 formed in a cylindrical shape from a resin material, and fitted around the outer periphery of the cylindrical body 5. The electromagnetic coil 29 is electrically connected to a connector pin 43 provided on a connector 41 via a wiring member 45. A drive circuit (not shown) is connected to the connector 41, and a drive current is passed through the electromagnetic coil 29 via the connector pin 43 and the wiring member 45.

The yoke 33 is made of a magnetic metal material. The yoke 33 is arranged on the outer periphery of the electromagnetic coil 29 so as to cover the electromagnetic coil 29, and also serves as the housing of the fuel injection valve 1. The lower end of the yoke 33 faces the outer periphery of the movable iron core 27a via the cylindrical body 5, and together with the movable iron core 27a and the fixed iron core 25, forms a closed magnetic circuit through which the magnetic flux generated by passing current through the electromagnetic coil 29 flows.

A coil spring 39 is arranged in a compressed state across the through hole 25a of the fixed core 25 and the recess 27c of the movable core 27a. The coil spring 39 functions as a biasing member that biases the movable element 27 in a direction in which the valve body 17 abuts against the valve seat 15b (valve closing direction). An adjuster (adjuster) 35 is arranged inside the through hole 25a of the fixed core 25, and the base end of the coil spring 39 abuts against the tip end face of the adjuster 35. The biasing force of the coil spring 39 on the movable element 27 (i.e., the valve body 17) is adjusted by adjusting the position of the adjuster 35 within the through hole 25a in the direction along the central axis 1a.

The adjuster 35 has a fuel flow passage 3 that passes through the center in a direction along the central axis 1a. After flowing through the fuel flow passage 3 of the adjuster 35, the fuel flows into the fuel flow passage 3 at the tip side of the through hole 25a of the fixed core 25, and then flows into the fuel flow passage 3 formed in the movable member 27.

An O-ring 46 is fitted onto the tip of the cylindrical body 5. When the fuel injection valve 1 is attached to the internal combustion engine, the O-ring 46 functions as a seal to ensure liquid and air tightness between the inner circumferential surface of the insertion port 109a (see FIG. 13) formed on the internal combustion engine side and the outer circumferential surface of the yoke 33.

The resin cover 47 is molded to cover the fuel injection valve 1 from the middle to the vicinity of the base end. The tip end of the resin cover 47 covers a part of the base end of the yoke 33. The resin cover 47 also covers the wiring member 45, and the connector 41 is integrally formed with the resin cover 47.

Next, the operation of the fuel injection valve 1 will be explained.

When the electromagnetic coil 29 is not energized (i.e., no drive current flows), the movable element 27 is biased in the valve closing direction by the coil spring 39, and the valve body 17 is in contact (seated) with the valve seat 15b. In this case, a gap δ exists between the tip end face (lower end face) of the fixed core 25 and the base end face (upper end face) of the movable core 27a. In this embodiment, this gap δ is equal to the stroke of the movable element 27 (i.e., the valve body 17).

When the electromagnetic coil 29 is energized and a driving current flows, a magnetic flux is generated in the closed magnetic circuit formed by the movable iron core 27a, the fixed iron core 25, and the yoke 33. This magnetic flux generates a magnetic attraction force between the fixed iron core 25 and the movable iron core 27a, which face each other across the gap δ. When this magnetic attraction force overcomes the combined force of the coil spring 39 and the fuel pressure acting on the movable iron core 27 in the valve closing direction, the movable iron core begins to move in the valve opening direction. When the valve body 17 moves away from the valve seat 15b, a gap (fuel flow path) is formed between the valve body 17 and the valve seat 15b, and fuel injection begins. In this embodiment, when the movable iron core 27 moves in the valve opening direction by a distance δ equal to the gap δ and the movable iron core 27a abuts against the fixed iron core 25, the movable iron core 27a stops moving in the valve opening direction and opens and reaches a stationary state.

When the power supply to the electromagnetic coil 29 is cut off, the magnetic attraction force decreases and eventually disappears. When the magnetic attraction force decreases and becomes smaller than the biasing force of the coil spring 39, the movable member 27 starts to move in the valve closing direction. When the valve body 17 abuts against the valve seat 15b, the valve body 17 closes the valve portion 7 and comes to a stationary state.

Next, the structure of the valve portion 7 and the nozzle portion 21 will be described in detail with reference to Figures 2 and 3. Figure 2 is an enlarged vertical cross-sectional view (corresponding to the cross-section taken along the line II-II in Figure 3) showing the valve portion and the vicinity of the fuel injection portion (nozzle portion 8) of the fuel injection valve 1 in Figure 1. Figure 3 is a view taken along the line III-III in Figure 1, and is a plan view showing only the nozzle plate 21n.

The plan view in FIG. 3 is a plan view of the nozzle plate 21n as viewed from the inlet side of the fuel injection holes 220-1 to 220-4, and is a plan view of the upper end surface 21nu of the nozzle plate 21n. The upper end surface 21nu is the surface that faces the tip surface 15t of the valve seat member 15. The end surface opposite the upper end surface 21nu is called the lower end surface 21nb.

As shown in FIG. 2, the valve seat member 15 is formed with a conical valve seat surface 15b that tapers toward the downstream side. The downstream end of the valve seat surface 15b is connected to the fuel introduction hole 300. The downstream end of the fuel introduction hole 300 opens to the tip surface 15t of the valve seat member 15. The fuel introduction hole 300 constitutes a fuel passage that introduces fuel into the swirl passages 210-1, 210-2, 210-3, and 210-4 (see FIG. 3).

The nozzle plate 21n is made of a plate-like member with both end faces made of flat surfaces, and the upper end face 21nu and the lower end face 21nb are parallel. In other words, the nozzle plate 21n is made of a flat plate with a uniform thickness.

The tip surface (lower end surface) 15t of the valve seat member 15 is configured as a flat surface (flat surface) perpendicular to the central axis 1a. A nozzle plate 21n is joined to the tip surface 15t of the valve seat member 15, and the tip surface 15t abuts the upper end surface 21nu of the nozzle plate 21n. The nozzle plate 21n is attached to the tip surface 15t of the valve seat member 15 so that the central axis 1a intersects with the center 21no of the nozzle plate 21n.

As shown in FIG. 3, the nozzle plate 21n is formed with the lateral passages 211-1, 211-2, 211-3, 211-4, the swirl chambers 212-1, 212-2, 212-3, 212-4, and the fuel injection holes (first fuel injection holes) 220-1, 220-2, 220-3, 220-4. The lateral passages 211-1, 211-2, 211-3, 211-4 and the swirl chambers 212-1, 212-2, 212-3, 212-4 form the swirl passages 210-1, 210-2, 210-3, 210-4 for applying a swirling force to the fuel and injecting the swirling fuel from the fuel injection holes 220-1, 220-2, 220-3, 220-4.

The multiple swirl chambers 212-1 to 212-4 are disposed upstream of the multiple fuel injection holes 220-1 to 220-4, respectively, and impart a swirling force to the fuel supplied to the fuel injection holes 220-1 to 220-4. The lateral passages 211-1 to 211-4 are connected to the multiple swirl chambers 212-1 to 212-4, respectively, and supply fuel to the multiple swirl chambers 212-1 to 212-4, respectively.

The four sets of swirl passages 210-1 to 210-4 and fuel injection holes 220-1 to 220-4 are configured in the same way, so they will not be differentiated and will be described as the lateral passage 211, swirl chamber 212, and fuel injection hole (first fuel injection hole) 220. If the configuration of each set is changed, this will be explained appropriately.

The swirl passage 210 is provided with the upstream ends of the lateral passages 211 facing the opening surface of the fuel inlet hole 300 in order to receive fuel from the fuel inlet hole 300. In this embodiment, as shown in FIG. 3, the upstream ends of the four sets of lateral passages 211-1 to 211-4 are connected and communicate with each other.

In FIG. 2, the lateral passage 211, swirl chamber 212, and fuel injection holes 220 are all formed in the nozzle plate 21n, which is made up of a single plate-like member. The nozzle plate 21n can be made up of multiple plates, for example, by dividing it in the thickness direction. For example, the lateral passage 211 and swirl chamber 212 can be formed in one plate, and the fuel injection holes 220 can be formed in another plate. These two plates can then be stacked to form the nozzle plate 21n.

In this embodiment, as shown in FIG. 3, the swirl passage 210-1 and the fuel injection hole 220-1 form one fuel passage, the swirl passage 210-2 and the fuel injection hole 220-2 form one fuel passage, the swirl passage 210-3 and the fuel injection hole 220-3 form one fuel passage, and the swirl passage 210-4 and the fuel injection hole 220-4 form one fuel passage. The swirl passage 210-1 is composed of the lateral passage 211-1 and the swirl chamber 212-1, the swirl passage 210-2 is composed of the lateral passage 211-2 and the swirl chamber 212-2, the swirl passage 210-3 is composed of the lateral passage 211-3 and the swirl chamber 212-3, and the swirl passage 210-4 is composed of the lateral passage 211-4 and the swirl chamber 212-4.

In addition, in this embodiment, as shown in FIG. 2, the central axis 220a of the fuel injection hole 220 is inclined at an angle greater than 0° with respect to the central axis 1a.

As shown in FIG. 3, the fuel injection holes 220-1, 220-2 inject fuel in the direction indicated by the arrow DSPI. For this reason, the central axis 220a of the fuel injection holes 220-1, 220-2 is inclined with respect to the central axis 1a so that the outlet opening of the fuel injection holes 220-1, 220-2 is located radially outward on the right side of FIG. 3 with respect to the inlet opening.

Furthermore, as shown in FIG. 3, the fuel injection holes 220-3, 220-4 inject fuel in the direction indicated by the arrow DSPII. For this reason, the central axis 220a of the fuel injection holes 220-3, 220-4 is inclined with respect to the central axis 1a so that the outlet opening of the fuel injection holes 220-3, 220-4 is located radially outward on the left side of FIG. 3 with respect to the inlet opening.

The central axis 220a of the fuel injection holes 220-1 and 220-2 may be inclined so as to be parallel to the arrow DSPI when projected onto FIG. 3, or may be inclined so that the distance between the two central axes 220a increases as the nozzle moves downstream in the injection direction. The central axis 220a of the fuel injection holes 220-3 and 220-4 may be inclined so as to be parallel to the arrow DSPII when projected onto FIG. 3, or may be inclined so that the distance between the two central axes 220a increases as the nozzle moves downstream in the injection direction.

By having the four fuel injection holes 220-1 to 220-4 inclined as described above, the fuel sprays injected from fuel injection holes 220-1 and 220-2 are directed in the direction indicated by the arrow DSPI, and the fuel sprays injected from fuel injection holes 220-3 and 220-4 are directed in the direction indicated by the arrow DSPII, so that the fuel sprays injected from fuel injection valve 1 are directed in two different directions.

In this embodiment, the nozzle plate 21n is configured with fuel passages consisting of four sets of swirl passages 210 and fuel injection holes 220. Each of the four sets of fuel passages is formed radially from the center 21no side of the nozzle plate 21n toward the outer periphery. In other words, the lateral passages 211 are provided radially from the center 21no side of the nozzle plate 21n toward the outer periphery, and extend in the radial direction of the nozzle plate 21n.

The four sets of turning passages 210 are arranged circumferentially spaced apart at angular intervals with a central angle of 90°. However, the four sets of turning passages 210 are not limited to this arrangement, and for example, the central angle formed by turning passages 210-1 and 210-2 and the central angle formed by turning passages 210-3 and 210-4 may be smaller than 90°, or the central angle formed by turning passages 210-1 and 210-4 and the central angle formed by turning passages 210-2 and 210-3 may be smaller than 90°.

In this embodiment, we propose a fuel injection valve 1 that can suppress overlap between multiple fuel sprays injected in two different directions and improve the separation of multiple fuel sprays. The fuel injection valve 1 injects at least two fuel sprays that are applied with a swirling force and directed in two different directions.

The number of swirl passages 210 and fuel injection holes 220 for this purpose is not limited to four, but may be two or three, or five or more.

The configuration of the swirl chamber 212 and the fuel injection hole 220 will now be described in detail with reference to Figure 4. Figure 4 is an enlarged plan view of the swirl chamber 212 and the fuel injection hole 220.

The lateral passage 211 is connected to the swirl chamber 212 so as to be offset with respect to the inlet opening 220i of the fuel injection hole 220 and the center O of the swirl chamber 212. The downstream end of the lateral passage 211 is connected to the inner peripheral wall (side wall) 212c of the swirl chamber 212, forming an opening 212co in the inner peripheral wall 212c.

The inner peripheral wall 212c of the swirl chamber 212 is formed to form a circle around the inlet opening 220i of the fuel injection hole 220 so as to swirl the fuel that flows into the swirl chamber 212 from the lateral passage 211. In other words, a swirl flow path 212d for fuel is formed between the inner peripheral wall 212c of the swirl chamber 212 and the inlet opening 220i of the fuel injection hole 220.

The lateral passage 211 has a rectangular cross section perpendicular to the extension direction or fuel flow direction, and the side walls (side surfaces) 211o, 211i and bottom surface 211b are formed by the nozzle plate 21n. The upper surface (ceiling surface) 211u (see Figure 2) of the lateral passage 211 is formed by the lower end surface 15t of the valve seat member 15.

The downstream end of the side wall 211o of the lateral passage 211 is connected to the starting end 212cs of the inner wall 212c of the swirl chamber 212. The downstream end of the side wall 211i of the lateral passage 211 is connected to the terminal end 212ce of the inner wall 212c of the swirl chamber 212.

The starting end 212cs is the end of the swirl chamber 212 located on the side where the fuel flows in (upstream side). In other words, the starting end 212cs is the end located on the upstream side in the flow direction of the swirling fuel. On the other hand, the terminal end 212ce is the end located on the side where the fuel that has flowed into the swirl chamber 212 flows down while swirling in the swirl chamber 212 along the inner circumferential wall 212c (downstream side).

The side wall 211o is a side wall located on the outer diameter side in the radial direction of the swirl chamber 212. On the other hand, the side wall 211i is a side wall located on the inner diameter side (inside the outer diameter) in the radial direction of the swirl chamber 212.

In this embodiment, one side wall 211o is connected to the upstream side of the inner circumferential wall 212c in the flow direction of the swirling fuel, and the other side wall 211i is connected to the downstream side of the inner circumferential wall 212c, and the downstream end of the lateral passage 211 is connected to the opening 212co of the inner circumferential wall 212c.

In this embodiment, the swirl chamber 212 is formed so that the inner wall 212c between the starting end 212cs and the ending end 212ce has a constant radius R from the center O. In other words, the inner wall 212c is formed from a part of a circumference that forms a perfect circle. As a result, a bottom surface 212b that constitutes a fuel passage (swirl flow passage) 212d is formed between the inlet opening edge 220i of the fuel injection hole 220 and the inner wall 212c of the swirl chamber 212.

The inner circumferential wall 212c may be formed to describe a spiral curve or an involute curve so as to swirl the fuel while approaching the inlet opening 220i of the fuel injection hole 220 or its center O. In this case, the cross-sectional area of the swirl flow passage gradually decreases toward the downstream side. When the inner circumferential wall 212c forms a spiral curve, the center O of the swirl chamber is the center of the spiral curve. When the inner circumferential wall 212c forms an involute curve, the center O of the swirl chamber is the center of the base circle.

In this embodiment, the inlet opening 220i of the fuel injection hole 220 is located on the side wall 211o side of the lateral passage 211, beyond the extension line 211il (particularly the extension line portion extended toward the swirl chamber 212) of the side wall 211i. In other words, the inlet opening 220i of the fuel injection hole 220 is located so that the extension line 211il intersects with the inlet opening edge 220ic and crosses the inlet opening 220i.

The configuration of the swirl passage 210 and the fuel injection hole 220 is not limited to the configuration described above, and the swirl passage 210 may be configured to impart a swirling force to the fuel injected from the fuel injection hole 220.

Referring back to FIG. 3, the fuel injection valve 1 of this embodiment has fuel injection holes (first fuel injection holes) 220-1 to 220-4 that inject fuel to which a swirling force has been applied, as well as fuel injection holes (second fuel injection holes) 320-1 and 320-2 that inject fuel to which a swirling force has not been applied.

The two first fuel injection holes 220-1, 220-2 are arranged in one of the two sections (areas) DM1 separated by a line segment (or a plane including the central axis 1a) IP1 passing through the center 21no of the nozzle plate 21n, and inject fuel in the direction indicated by the arrow DSPI. The two first fuel injection holes 220-3, 220-4 are arranged in the other of the two sections DM2 separated by the line segment (or plane) IP1, and inject fuel in the direction indicated by the arrow DSPII.

The second fuel injection hole 320-1 is disposed in the vicinity of the first fuel injection holes 220-1 and 220-2 in the section DM1 so that the fuel spray injected from the second fuel injection hole 320-1 can attract the two fuel sprays injected from the first fuel injection holes 220-1 and 220-2 in the direction indicated by the arrow DSPI, and injects fuel in the direction indicated by the arrow DSPI. For this reason, the central axis of the second fuel injection hole 320-1 is inclined with respect to the central axis 1a so that the outlet opening is located radially outward on the right side of the inlet opening in FIG. 3, similar to the first fuel injection holes 220-1 and 220-2.

The second fuel injection hole 320-2 is arranged in the vicinity of the first fuel injection holes 220-3 and 220-4 in the section DM2 so that the fuel spray injected from the second fuel injection hole 320-2 can attract the two fuel sprays injected from the first fuel injection holes 220-3 and 220-4 in the direction shown by the arrow DSPII, and injects fuel in the direction shown by the arrow DSPII. For this reason, the central axis of the second fuel injection hole 320-2 is inclined with respect to the central axis 1a so that the outlet opening is located radially outward on the left side of FIG. 3 with respect to the inlet opening, similar to the first fuel injection holes 220-3 and 220-4.

In this embodiment, lateral passages (second lateral passages) 311-1, 311-2 are provided that extend radially outward from the center of the nozzle plate 21n, and the second fuel injection holes 320-1, 320-2 are located at the downstream ends of the second lateral passages 311-1, 311-2.

One end of the second transverse passage 311-1 is connected to the other transverse passages (first transverse passages) 211-1 to 211-4 and the second transverse passage 311-2 at the center of the nozzle plate 21n, and the second fuel injection hole 320-1 is arranged at the other end of the second transverse passage 311-1. One end of the second transverse passage 311-2 is connected to the other first transverse passages 211-1 to 211-4 and the second transverse passage 311-1 at the center of the nozzle plate 21n, and the second fuel injection hole 320-2 is arranged at the other end of the second transverse passage 311-2. The upstream ends of the second transverse passages 311-1 and 311-2 face the opening surface of the fuel introduction hole 300, and receive fuel from the fuel introduction hole 300 in the same way as the first transverse passages 211-1 to 211-4.

The second horizontal passages 311-1 and 311-2 are formed in the nozzle plate 21n using the same method as the first horizontal passages 211-1 to 211-4.

The second fuel injection hole 320-1 is disposed between the first fuel injection holes 220-1 and 220-2 in order to be disposed near the first fuel injection holes 220-1 and 220-2. In particular, in this embodiment, the inlet opening of the second fuel injection hole 320-1 is aligned with the inlet openings of the first fuel injection holes 220-1 and 220-2, and the inlet opening of the second fuel injection hole 320-1 is disposed midway between the inlet openings of the first fuel injection holes 220-1 and 220-2.

The second fuel injection hole 320-2 is disposed between the first fuel injection holes 220-3 and 220-4 in order to be disposed near the first fuel injection holes 220-3 and 220-4. In particular, in this embodiment, the inlet opening of the second fuel injection hole 320-2 is aligned with the inlet openings of the first fuel injection holes 220-3 and 220-4, and the inlet opening of the second fuel injection hole 320-2 is disposed midway between the inlet openings of the first fuel injection holes 220-3 and 220-4.

The first lateral passage 211-1 and the first fuel injection hole 220-1, and the first lateral passage 211-2 and the first fuel injection hole 220-2 are arranged symmetrically with respect to a line segment IP2 perpendicular to the line segment IP1. At this time, the second lateral passage 311-1 is provided on the line segment IP2 along the line segment IP2. The first lateral passage 211-3 and the first fuel injection hole 220-3, and the first lateral passage 211-4 and the first fuel injection hole 220-4 are arranged symmetrically with respect to a line segment IP2 perpendicular to the line segment IP1. At this time, the second lateral passage 311-2 is provided on the line segment IP2 along the line segment IP2.

In the swirl passages 210-1, 210-2, the swirl chambers (first swirl chambers) 212-1, 212-2 are arranged on the side of the second fuel injection hole 320-1 (i.e., the side of line segment IP2) with respect to the center line of the first horizontal passages 211-1, 211-2, and in the first swirl passages 210-3, 210-4, the swirl chambers (first swirl chambers) 212-3, 212-4 are arranged on the side of the second fuel injection hole 320-2 (i.e., the side of line segment IP2) with respect to the center line of the first horizontal passages 211-3, 211-4.

In this embodiment, the first fuel injection holes 220-1 to 220-4 are fuel injection holes that inject fuel to which a swirling force is applied, whereas the second fuel injection holes 320-1, 320-2 are fuel injection holes that inject fuel to which a swirling force is not applied. For this reason, no swirl chamber is provided in the fuel passages 310-1, 310-2 including the second lateral passages 311-1, 311-2 and the second fuel injection holes 320-1, 320-2.

However, depending on the way the fuel flows in the fuel passages 310-1 and 310-2, a weak swirling force may be applied to the fuel injected from the second fuel injection holes 320-1 and 320-2. In addition, a swirling chamber (second swirling chamber) may be provided in the fuel passages 310-1 and 310-2 to actively apply a swirling force to the fuel injected from the second fuel injection holes 320-1 and 320-2. However, the fuel injected from the second fuel injection holes 320-1 and 320-2 must have a strong penetrating force that can attract the fuel injected from the first fuel injection holes 220-1 to 220-4. For this reason, when a second swirling chamber is provided in the fuel passages 310-1 and 310-2, the swirling force applied to the fuel in this second swirling chamber is set to be smaller than the swirling force applied to the fuel injected from the first fuel injection holes 220-1 to 220-4.

In other words, the fuel injected from the second fuel injection holes 320-1, 320-2 has no swirling force or has a swirling force that is smaller than the swirling force of the fuel injected from the first fuel injection holes 220-1 to 220-4.

The function of the second fuel injection holes 320-1, 320-2 will now be described with reference to Figure 5. Figure 5 is a conceptual diagram showing the relationship between the fuel spray injected from the first fuel injection holes 220-1, 220-2 and the fuel spray injected from the second fuel injection hole 320-1.

The function of the second fuel injection hole 320-1 with respect to the swirl passage (first swirl passage) 210-1, 210-2 and the first fuel injection holes 220-1, 220-2 is the same as the function of the second fuel injection hole 320-2 with respect to the swirl passage (first swirl passage) 210-3, 210-4 and the first fuel injection holes 220-3, 220-4. For this reason, FIG. 5 illustrates the first swirl passage 210-1, 210-2, the first fuel injection holes 220-1, 220-2, and the second fuel injection hole 320-1.

As shown in the left diagram of FIG. 5, if there is no second fuel injection hole 320-1, when the fuel to which a swirling force is applied in the first swirl chambers 212-1, 212-2 is injected from the first fuel injection holes 220-1, 201-3, each fuel spray SP1, SP2 spreads at a wide angle, and the total spray SP consisting of the two fuel sprays SP1, SP2 also spreads at a wide angle (spray angle θ'). In this case, the spray angles of each fuel spray SP1, SP2 when the left diagram of FIG. 5 is viewed from the side (for example, the left side) also spreads at a wide angle. For this reason, the fuel spray injected from the first fuel injection holes 220-1, 220-2 in the DSPI direction and the fuel spray injected from the first fuel injection holes 220-3, 220-4 in the DSPI II direction overlap on the adjacent sides, and the separation of the sprays injected in the two directions DSPI, DSPII is deteriorated.

On the other hand, in this embodiment, as shown in the right diagram of FIG. 5, the second fuel injection hole 320-1 is provided, and thus the fuel spray SP5 is injected from the second fuel injection hole 320-1. The fuel spray SP5 has a stronger penetration force than the fuel sprays SP1 and SP2, and the flow velocity (axial flow velocity) in the injection axis direction of the fuel spray SP5 injected from the second fuel injection hole 320-1 is greater than the flow velocity (axial flow velocity) in the injection axis direction of the fuel sprays SP1 and SP2 injected from the first fuel injection holes 220-1 and 220-2. Therefore, the fuel spray SP5 attracts the fuel sprays SP1 and SP2 ahead of the fuel sprays SP1 and SP2, so that the spray angle θ of each of the sprays SP1 and SP2 injected from the multiple first fuel injection holes 220-1 and 220-2 and the overall spray SP becomes smaller (to a narrow angle).

In this case, the spray angles of the fuel sprays SP1, SP2 when the right diagram in FIG. 5 is viewed from the side (e.g., the left side) also become smaller (towards a narrower angle). As a result, the fuel sprays injected in the DSPI direction from the first fuel injection holes 220-1, 220-2 and the fuel sprays injected in the DSPII direction from the first fuel injection holes 220-3, 220-4 become separated on their adjacent sides, suppressing overlap between the sprays injected in the two directions DSPI, DSPII, and improving the separation of the sprays injected in the two directions DSPI, DSPII.

In this way, in the fuel injection valve 1 of this embodiment, the fuel sprays SP1, SP2 injected from the first fuel injection holes 220-1, 220-2 are atomized by applying a strong swirling force, but are attracted to the fuel spray SP5 injected from the second fuel injection hole 320, and an angle is formed between the individual fuel sprays SP1, SP2 and the overall spray SP. In other words, atomization of the spray droplets is achieved by applying a swirling force to the fuel injected from the first fuel injection holes 220-1, 220-2, and the diffusion of the fuel sprays SP1, SP2 after injection can be suppressed by the fuel spray SP5 injected from the second fuel injection hole 320-1. As a result, atomization and angle formation of the individual fuel sprays SP1, SP2 and the overall spray SP can be achieved at the same time.

The fuel spray SP5 is a fuel spray that attracts the fuel spray FS1 injected from the first fuel injection holes 220-1, 220-2, and is sometimes referred to as an induced fuel spray.

The arrangement of fuel sprays SP1 to SP4 injected from the first fuel injection holes 220-1 to 220-4 and fuel sprays SP5 and SP6 injected from the second fuel injection holes 320-1 and 320-2 will be described using Figure 6. Figure 6 is a conceptual diagram showing the arrangement of fuel sprays on a plane perpendicular to the central axis 1a of the fuel injection valve 1.

In this embodiment, the injection direction (angle) of the first fuel injection holes 220-1, 220-2 and the injection direction (angle) of the second fuel injection hole 320-1 are set to the same angle, so that the fuel sprays SP1, SP2 injected from the first fuel injection holes 220-1, 220-2 and the fuel spray SP5 injected from the second fuel injection hole 320-1 are aligned in a straight line, as shown in FIG. 6.

In addition, by making the injection direction (angle) of the first fuel injection holes 220-3, 220-4 and the injection direction (angle) of the second fuel injection hole 320-2 the same angle, the fuel sprays SP3, SP4 injected from the first fuel injection holes 220-3, 220-4 and the fuel spray SP6 injected from the second fuel injection hole 320-2 are aligned in a straight line, as shown in FIG. 6.

This fuel spray arrangement is particularly effective in narrowing the spray angle θ described in FIG. 5 while achieving the above-mentioned atomization and narrowing of the fuel spray, because fuel spray SP5 is aligned in a straight line with fuel sprays SP1 and SP2, and fuel spray SP6 is aligned in a straight line with fuel sprays SP3 and SP4.

In this embodiment, an example has been described in which the first fuel injection hole that injects fuel in one direction is composed of two fuel injection holes, but this is not limited to this example, and the first fuel injection hole that injects fuel in one direction may be composed of one or three or more fuel injection holes.

Next, a first modified example of the nozzle plate 21n will be described with reference to Figures 7 and 8. Figure 7 is a plan view similar to Figure 3, showing the first modified example of the nozzle plate 21n. Figure 8 is a conceptual diagram showing the arrangement of fuel sprays in the nozzle plate 21n shown in Figure 7.

In this example, the second fuel injection hole 320-1 is disposed radially inward from the line segment connecting the first fuel injection holes 220-1 and 220-2, and the second fuel injection hole 320-2 is disposed radially inward from the line segment connecting the first fuel injection holes 220-3 and 220-4. The other configurations are the same as those of the above-mentioned embodiments.

In this example, this can be achieved by making the length of the second horizontal passages 311-1, 311-2 of the second fuel injection holes 320-1, 320-2 shorter than the length of the second horizontal passages 311-1, 311-2 in the above-mentioned embodiment.

In this example, by making the injection direction (angle) of the first fuel injection holes 220-1, 220-2 and the injection direction (angle) of the second fuel injection hole 320-1 the same angle, the fuel spray SP5 is positioned on the opposite side of the injection direction DSPI with respect to the line segment connecting the fuel sprays SP1 and SP2. Also, by making the injection direction (angle) of the first fuel injection holes 220-3, 220-4 and the injection direction (angle) of the second fuel injection hole 320-2 the same angle, the fuel spray SP6 is positioned on the opposite side of the injection direction DSPII with respect to the line segment connecting the fuel sprays SP3 and SP4.

This fuel spray arrangement is effective in suppressing the spread of fuel sprays in two directions while achieving the above-mentioned atomization and narrow angle of the fuel spray, because fuel sprays SP5 and SP6 suppress the spread of fuel sprays SP1, SP2, SP3, and SP4 in the injection directions DSPI and DSPII.

Next, a second modified example of the nozzle plate 21n will be described with reference to Figures 9 and 10. Figure 9 is a plan view similar to Figure 3, showing the second modified example of the nozzle plate 21n. Figure 10 is a conceptual diagram showing the arrangement of fuel sprays in the nozzle plate 21n shown in Figure 9.

In this example, the second fuel injection hole 320-1 is positioned radially outward from the line segment connecting the first fuel injection holes 220-1 and 220-2, and the second fuel injection hole 320-2 is positioned radially outward from the line segment connecting the first fuel injection holes 220-3 and 220-4. The rest of the configuration is the same as in the above-mentioned embodiment.

In this example, this can be achieved by making the length of the second horizontal passages 311-1, 311-2 of the second fuel injection holes 320-1, 320-2 longer than the length of the second horizontal passages 311-1, 311-2 in the above-mentioned embodiment.

In this example, by making the injection direction (angle) of the first fuel injection holes 220-1, 220-2 and the injection direction (angle) of the second fuel injection hole 320-1 the same angle, the fuel spray SP5 is located forward of the injection direction DSPI with respect to the line segment connecting the fuel sprays SP1 and SP2. Also, by making the injection direction (angle) of the first fuel injection holes 220-3, 220-4 and the injection direction (angle) of the second fuel injection hole 320-2 the same angle, the fuel spray SP6 is located forward of the injection direction DSPII with respect to the line segment connecting the fuel sprays SP3 and SP4.

This fuel spray arrangement promotes the spread of fuel sprays SP5 and SP6 in the injection directions DSPI and DSPII of fuel sprays SP1, SP2, SP3, and SP4, and is therefore effective in preventing the fuel sprays injected in two different directions from overlapping while achieving the above-mentioned atomization and narrowing of the angle of the fuel spray.

Next, a third modified example of nozzle plate 21n will be described with reference to FIG. 11. FIG. 11 is a plan view similar to FIG. 3, showing the third modified example of nozzle plate 21n.

In this example, the second horizontal passages 311-1, 311-2 of the second fuel injection holes 320-1, 320-2 are eliminated, and the second fuel injection holes 320-1, 320-2 are positioned facing the opening surface of the fuel introduction hole 300. The rest of the configuration is the same as in the above-mentioned embodiment.

In this example, it is preferable that at least the inlet openings of the second fuel injection holes 320-1 and 320-2 are positioned facing the opening surface of the fuel introduction hole 300. In other words, the outlet openings of the second fuel injection holes 320-1 and 320-2 may be located radially outward from the opening surface of the fuel introduction hole 300.

The fuel spray arrangement in this example is similar to that shown in FIG. 8, and is effective in suppressing the spread of the fuel spray in two directions while achieving the above-mentioned atomization and narrow angle of the fuel spray.

In this example, the number of steps required to process the lateral passages 311-1 and 311-2 is reduced from the total number of steps required to process the nozzle plate 21n, thereby shortening the processing time for the nozzle plate 21n and improving productivity. In addition, the second lateral passages 311-1 and 311-2 create dead volume, but in this example, the absence of the second lateral passages 311-1 and 311-2 reduces the dead volume.

Next, a third modified example of nozzle plate 21n will be described with reference to FIG. 12. FIG. 12 is a plan view similar to FIG. 3, showing a fourth modified example of nozzle plate 21n.

In this example, the upstream ends of the four first horizontal passages 211-1 to 211-4 are not connected to each other, and the four first turning passages 210-1, 210-2 are independent of each other, as compared to the configuration shown in FIG. 11. The rest of the configuration is the same as the configuration shown in FIG. 11.

The fuel spray arrangement in this example is similar to that shown in FIG. 8, and is effective in suppressing the spread of the fuel spray in two directions while achieving the above-mentioned atomization and narrow angle of the fuel spray.

In this example, the length of the first turning passages 210-1, 210-2 is shorter than the configuration shown in FIG. 11, so the dead volume is further reduced compared to the configuration shown in FIG. 11.

An internal combustion engine equipped with a fuel injection valve according to the present invention will be described with reference to Figure 13. Figure 13 is a cross-sectional view of an internal combustion engine equipped with a fuel injection valve 1.

The engine block 101 of the internal combustion engine 100 has a cylinder 102 formed therein, and an intake port 103 and an exhaust port 104 are provided at the top of the cylinder 102. The intake port 103 has an intake valve 105 for opening and closing the intake port 103, and the exhaust port 104 has an exhaust valve 106 for opening and closing the exhaust port 104. An intake pipe 108 is connected to the inlet end 107a of an intake flow passage 107 formed in the engine block 101 and communicating with the intake port 103.

A fuel pipe 110 is connected to the fuel supply port 2 of the fuel injection valve 1 (see Figure 1).

The intake pipe 108 is formed with a mounting portion 109 for the fuel injection valve 1, and the mounting portion 109 is formed with an insertion port 109a for inserting the fuel injection valve 1. The insertion port 109a penetrates to the inner wall surface (intake flow path) of the intake pipe 108, and fuel injected from the fuel injection valve 1 inserted into the insertion port 109a is injected into the intake flow path. In the case of a two-way spray, the target is an internal combustion engine in which two intake ports 103 are provided in the engine block 101, and each fuel spray injected from one fuel injection valve 1 is directed toward each intake port 103 (intake valve 105).

The above-described embodiment and its modifications have the following features.
(1) A plurality of first fuel injection holes including fuel injection holes 220-1, 220-2 which inject fuel in one of two different directions DSPI, DSPII, and fuel injection holes 220-3, 220-4 which inject fuel in the other of the two directions;
a plurality of first swirl chambers 212 arranged upstream of the respective first fuel injection holes 220 and applying a swirling force to the fuel supplied to the first fuel injection holes 220;
a plurality of first lateral passages 211 for supplying fuel to each of the plurality of first swirl chambers 212;
The fuel injection nozzle is provided with a plurality of second fuel injection holes including a fuel injection hole 320-1 which injects fuel in one of the two directions DSPI and DSPII, and a fuel injection hole 320-2 which injects fuel in the other of the two directions.

(2) a nozzle plate 21n is provided in which a plurality of first fuel injection holes 220, a plurality of first swirl chambers 212, a plurality of first lateral passages 211, and a plurality of second fuel injection holes 320-1, 320-2 are formed;
The first fuel injection holes 220-1, 220-2 which inject fuel in one direction DSPI and the second fuel injection hole 320-1 which injects fuel in one direction DSPI are disposed in one section DM1 of two sections DM1, DM2 which are defined by a first line segment IP1 passing through a center 21no of the nozzle plate 21n,
The first fuel injection holes 220-3, 220-4 which inject fuel in the other direction DSPII, and the second fuel injection hole 320-2 which injects fuel in the other direction DSPII are arranged in the other of the two divisions DM1, DM2 defined by the first line segment IP1, namely, the division DM2.
(3) A plurality of first fuel injection holes 220-1, 220-2 that inject fuel in one direction DSPI;
A plurality of first fuel injection holes 220-3, 220-4 are provided for injecting fuel in the other direction DSPII.
A second fuel injection hole 320-1 that injects fuel in one direction DSPI is disposed between a plurality of first fuel injection holes 220-1, 220-2 that inject fuel in one direction DSPI,
The second fuel injection hole 320-2 which injects fuel in the other direction DSPII is disposed between the plurality of first fuel injection holes 220-3, 220-4 which inject fuel in the other direction DSPII.

(4) the second fuel injection hole 320-1 which injects fuel in one direction DSPI and the first fuel injection holes 220-1, 220-2 which inject fuel in one direction DSPI are arranged on a straight line;
The second fuel injection hole 320-1 that injects fuel in one direction DSPI is disposed between the first fuel injection holes 220-1, 220-2 that inject fuel in one direction DSPI,
The second fuel injection hole 320-2 which injects fuel in the other direction DSPII and the first fuel injection holes 220-3, 220-4 which inject fuel in the other direction DSPII are arranged on a straight line,
The second fuel injection hole 320-2 which injects fuel in the other direction DSPII is disposed between the plurality of first fuel injection holes 220-3, 220-4 which inject fuel in the other direction DSPII.

(5) The second fuel injection hole 320-1 that injects fuel in one direction DSPI is disposed radially outward with respect to a line segment connecting the first fuel injection holes 220-1, 220-2 that inject fuel in one direction DSPI,
The second fuel injection hole 320-2 which injects fuel in the other direction DSPII is disposed radially outward with respect to the line segment connecting the first fuel injection holes 220-3, 220-4 which inject fuel in the other direction DSPII.

(6) The second fuel injection hole 320-1 that injects fuel in one direction DSPI is disposed radially inward with respect to a line segment connecting the first fuel injection holes 220-1, 220-2 that inject fuel in one direction DSPI,
The second fuel injection hole 320-2 which injects fuel in the other direction DSPII is disposed radially inward with respect to a line segment connecting the first fuel injection holes 220-3, 220-4 which inject fuel in the other direction DSPII.

(7) The second fuel injection holes 320-1, 320-2 have a plurality of second lateral passages 311-1, 311-2 formed at the downstream end.

(8) A valve seat member 15 is provided to which a valve seat 15b is formed and to which a nozzle plate 21n is fixed,
The valve seat member 15b has a fuel introduction hole 300 that opens to an end surface 15t to which the nozzle plate 21n is fixed,
The plurality of second fuel injection holes 320 - 1 , 320 - 2 are arranged to face the opening surface of the fuel introduction hole 300 .

(9) The upstream end of each of the first horizontal passages 211-1 to 211-4 is not connected to the upstream end of each of the other first horizontal passages 211-1 to 211-4, and is provided independently.
The multiple first lateral passages 211 - 1 to 211 - 4 are arranged such that their upstream ends face the opening surface of the fuel introduction hole 300 .

(10) A plurality of second lateral passages 311-1, 311-2 having second fuel injection holes 320-1, 320-2 formed at their downstream ends are provided, and the first fuel injection holes 220-1, 220-2 arranged in one section DM1, the first swirl chambers 212-1, 212-2 arranged upstream of the first fuel injection holes 220-1, 220-2, and the first lateral passages 211-1, 211-2 supplying fuel to the first swirl chambers 212-1, 212-2 are provided in a plurality of sets so as to be arranged line-symmetrically with respect to a second line segment IP2 perpendicular to a first line segment IP1,
The second lateral passages 311-1, 311-2 are provided on and along the second line segment IP2.

The present invention is not limited to the above-described embodiments and modified examples, and some configurations may be deleted or other configurations not described may be added. Furthermore, configurations may be interchanged or added between the embodiments and modified examples.

1...fuel injection valve, 1a...valve axis (central axis), 15...valve seat member, 15b...valve seat, 15t...end surface of valve seat member 15b to which nozzle plate 21n is fixed, 17...valve body, 21n...nozzle plate, 21no...center of nozzle plate 21n, 211, 211-1 to 211-4...first lateral passage, 212, 212-1 to 212-4...first swirl chamber, 220, 220-1 to 220-4...first fuel injection hole, 300...fuel introduction hole, 311-1, 311-2...second lateral passage, 320-1, 320-2...second fuel injection hole, DM1, DM2...two sections, DSPI, DSPII...two different directions, IP1...first line segment, IP2...second line segment.

Claims (5)

a plurality of first fuel injection holes including a plurality of fuel injection holes which inject fuel by directing in one of two different directions, and a plurality of fuel injection holes which inject fuel by directing in the other of the two directions;
a plurality of first swirl chambers disposed upstream of the plurality of first fuel injection holes and configured to impart a swirling force to fuel supplied to the first fuel injection holes;
a plurality of first lateral passages for supplying fuel to each of the plurality of first swirl chambers;
a plurality of second fuel injection holes including a fuel injection hole which injects fuel by directing in one of the two directions and a fuel injection hole which injects fuel by directing in the other of the two directions;
a nozzle plate in which the first fuel injection holes, the first swirl chambers, the first lateral passages, and the second fuel injection holes are formed;
Equipped with
the first fuel injection hole which injects fuel in the one direction and the second fuel injection hole which injects fuel in the one direction are disposed in one of two sections which are partitioned by a first line segment passing through a center of the nozzle plate,
the first fuel injection hole which injects fuel while pointing in the other direction and the second fuel injection hole which injects fuel while pointing in the other direction are disposed in the other of the two sections partitioned by the first line segment,
the second fuel injection hole which injects fuel in the one direction is disposed between the first fuel injection holes which inject fuel in the one direction,
the second fuel injection hole which injects fuel in the other direction is disposed between the first fuel injection holes which inject fuel in the other direction,
the second fuel injection hole which injects fuel in the one direction and the plurality of first fuel injection holes which inject fuel in the one direction are arranged in a straight line,
the second fuel injection hole which injects fuel in the one direction is disposed intermediate the first fuel injection holes which inject fuel in the one direction,
the second fuel injection hole which injects fuel while pointing in the other direction and the plurality of first fuel injection holes which inject fuel while pointing in the other direction are arranged on a straight line,
the second fuel injection hole which injects fuel in the other direction is disposed intermediate the first fuel injection holes which inject fuel in the other direction . a plurality of first fuel injection holes including a plurality of fuel injection holes which inject fuel by directing in one of two different directions, and a plurality of fuel injection holes which inject fuel by directing in the other of the two directions;
a plurality of first swirl chambers disposed upstream of the plurality of first fuel injection holes and configured to impart a swirling force to fuel supplied to the first fuel injection holes;
a plurality of first lateral passages for supplying fuel to each of the plurality of first swirl chambers;
a plurality of second fuel injection holes including a fuel injection hole which injects fuel by directing in one of the two directions and a fuel injection hole which injects fuel by directing in the other of the two directions;
a nozzle plate in which the first fuel injection holes, the first swirl chambers, the first lateral passages, and the second fuel injection holes are formed;
Equipped with
the first fuel injection hole which injects fuel in the one direction and the second fuel injection hole which injects fuel in the one direction are disposed in one of two sections which are partitioned by a first line segment passing through a center of the nozzle plate,
the first fuel injection hole which injects fuel while pointing in the other direction and the second fuel injection hole which injects fuel while pointing in the other direction are disposed in the other of the two sections partitioned by the first line segment,
the second fuel injection hole which injects fuel in the one direction is disposed between the first fuel injection holes which inject fuel in the one direction,
the second fuel injection hole which injects fuel in the other direction is disposed between the first fuel injection holes which inject fuel in the other direction,
the second fuel injection hole which injects fuel while being directed in the one direction is disposed radially outward with respect to a line segment connecting the plurality of first fuel injection holes which inject fuel while being directed in the one direction,
the second fuel injection hole, which injects fuel by pointing in the other direction, is disposed radially outward of a line segment connecting the first fuel injection holes, which inject fuel by pointing in the other direction. 3. The fuel injection valve according to claim 1 ,
a fuel injection valve including a plurality of second lateral passages each having the second fuel injection holes formed at a downstream end thereof; 3. The fuel injection valve according to claim 1 ,
a valve seat member to which the nozzle plate is fixed,
the valve seat member has a fuel inlet hole that opens into an end surface to which the nozzle plate is fixed,
the first lateral passages are provided independently of each other, with each upstream end being not connected to an upstream end of the other first lateral passages;
The plurality of first lateral passages are disposed in a fuel injection valve such that the upstream ends face an opening surface of the fuel introduction hole. 3. The fuel injection valve according to claim 1 ,
the second fuel injection hole includes a plurality of second lateral passages formed at a downstream end thereof, the first fuel injection hole arranged in one of the sections, the first swirl chamber arranged upstream of the first fuel injection hole, and the first lateral passage for supplying fuel to the first swirl chamber are provided in a plurality of sets so as to be arranged line-symmetrically with respect to a second line segment perpendicular to the first line segment,
The second lateral passage is provided on and along the second line segment.

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