JP6090069B2 - Fuel injection valve - Google Patents

Description

  The present invention relates to a fuel injection valve that injects gaseous fuel.

  A fuel injection valve for gaseous fuel described in Patent Document 1 has an injection hole body in which an injection hole is formed, a valve body that operates to open and close the injection hole, and a valve body that is attached to the valve body. And a sealing material that closes the nozzle hole in close contact with the sheet surface of the nozzle hole body when operated. The sealing material has a shape extending annularly around the central axis of the valve body, and when the valve body is opened, fuel flows from the annular outer side to the inner side of the sealing material and is injected from the injection hole.

JP 2012-219656 A

  As the degree of fuel flow restriction (hereinafter referred to as seat restriction) between the seat surface of the nozzle hole body and the sealing material increases, the injection rate of fuel injected from the nozzle holes (that is, the fuel per unit time) (Injection amount) becomes smaller. Therefore, conventionally, a desired injection rate has been ensured by increasing the maximum lift amount of the valve body to reduce the degree of seat restriction. However, when the maximum lift amount is increased, the driving force required for the actuator that opens the valve element increases.

  In view of this, the present inventor has studied a structure that forms a passage through which the fuel is guided from the annular inner side of the sealing material to the nozzle hole in addition to the passage through which the fuel is guided from the annular outer side of the sealing material to the nozzle hole. According to this, since the fuel flows into the nozzle hole from both the annular outer side and the inner side of the sealing material, the degree of seat restriction can be reduced without increasing the maximum lift amount.

  However, in the case of the configuration of Patent Document 1, an injection hole can be formed in a range including the central axis, whereas in the case of the configuration according to the above examination, a passage leading from the inside of the sealing material to the injection hole is provided. The nozzle hole cannot be formed in a range including the central axis. Therefore, the opening area of the nozzle hole is reduced, and there is a concern that a sufficient injection rate cannot be ensured.

  The present invention has been made in view of the above problems, and its purpose is to reduce the degree of seat restriction without increasing the maximum lift amount of the valve body, and to sufficiently increase the opening area of the nozzle hole. An object of the present invention is to provide a fuel injection valve that achieves both of these requirements.

  The invention disclosed herein employs the following technical means to achieve the above object. It should be noted that the reference numerals in parentheses described in the claims and in this section indicate the correspondence with the specific means described in the embodiments described later as one aspect, and the technical scope of the present invention It is not limited.

  One of the disclosed inventions is an injection hole body (60, 600) in which an injection hole (60a) into which gaseous fuel is injected is formed, and a valve body that operates to open and close the injection hole. A valve body (40) formed with a central passage (42) through which fuel flows along the central axis (C) of the body and a branch passage (43) branched from the central passage; and a valve body attached to the valve body And a sealing material (50) that closes the nozzle hole in close contact with the nozzle hole body.

The sealing material has a shape extending annularly around the central passage, and seals the fuel that has passed through the central passage from the inner side with respect to the injection hole, and the fuel that has passed through the branch passage has an annular shape with respect to the injection hole. The nozzle hole functions to seal from the outside, and the injection hole has a shape extending around the central axis, and is located on the side farther from the central axis than the outlet (43a) of the branch passage in the direction perpendicular to the central axis. Yes.
The plate portion is formed with an inner guide wall (61c) and an outer guide wall (61d) that project to the downstream side of the fuel flow on the downstream surface of the fuel flow. The outer guide wall is opposite to the central axis with respect to the nozzle hole, and has a tapered surface that is inclined toward the central axis from the upstream side to the downstream side of the fuel flow. It has a taper surface which inclines so that it may leave | separate from a center axis line toward the downstream from the upstream of a fuel flow.

  According to this, the sealing material has a shape extending annularly around the central passage, and functions to seal the fuel flowing through the central passage from the inside of the annular and seal the fuel flowing through the branch passage from the outside of the annular. To do. Therefore, when the valve body is opened, fuel flows into the nozzle hole from both the annular outer side and the annular inner side of the sealing material. Therefore, the degree of sheet restriction can be reduced as compared with the case where fuel flows into the nozzle hole from only one side of the sealing material.

  The nozzle hole is located on the side farther from the center axis than the outlet of the branch passage in the direction perpendicular to the center axis. Therefore, the length of the nozzle hole in the direction around the central axis (hereinafter referred to as the circumferential length) is longer than when the nozzle hole is located on the side closer to the central axis. Therefore, the opening area of the nozzle hole is increased by the length of the circumferential length, and a sufficient injection rate can be ensured.

  As described above, according to the present invention, it is possible to achieve both the reduction of the degree of seat restriction without increasing the maximum lift amount of the valve body and the sufficiently large opening area of the injection hole.

Sectional drawing which showed partially the fuel injection valve which concerns on 1st Embodiment of this invention. The top view which looked at the nozzle hole body shown in FIG. 1 from the upstream of the fuel flow. Sectional drawing which looked at the nozzle hole body shown in FIG. 1, a valve body, and the sealing material along the III-III line of FIG. Sectional drawing which shows the state which the valve body shown in FIG. Sectional drawing which showed partially the fuel injection valve which concerns on 2nd Embodiment of this invention.

  A plurality of modes for carrying out the invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly show that combinations are possible in each embodiment, but also combinations of the embodiments even if they are not explicitly stated unless there is a problem with the combination. Is also possible.

(First embodiment)
A fuel injection valve 1 shown in FIG. 1 is mounted on a vehicle and injects gaseous fuel used for combustion of an internal combustion engine. Specific examples of the gaseous fuel include CNG (Compressed Natural Gas), LNG (Liquid Natural Gas), hydrogen, and the like. In a fuel tank (not shown) mounted on the vehicle, gaseous fuel is stored in a compressed state. The gaseous fuel in the fuel tank is supplied to the fuel injection valve 1 after the pressure is adjusted by the pressure adjustment valve. The gaseous fuel injected from the fuel injection valve 1 flows into the intake pipe of the internal combustion engine through a rubber hose (not shown), and flows into the combustion chamber while mixing with the intake air.

  The fuel injection valve 1 includes a resin housing 10 and a metal housing 11. These housings 10 and 11 are formed in a cylindrical shape. A coil 20, an upper magnetic body 21, a nonmagnetic body 22, and a lower magnetic body 23, which will be described below, are accommodated inside the cylindrical shapes of the housings 10 and 11. Note that an O-ring 13 is attached to the tip of the metal housing 11, and the O-ring 13 is held by the stopper 12 so as not to be detached from the metal housing 11. A connector (not shown) is attached to a portion of the metal housing 11 to which the O-ring 13 is attached, and the above-described rubber hose is attached to this connector.

  The coil 20 is disposed on the outer peripheral side of the nonmagnetic material 22 and is supplied with electric power from the outside of the fuel injection valve 1 to generate lines of magnetic force. The upper magnetic body 21, the non-magnetic body 22 and the lower magnetic body 23 have a cylindrical shape with the same diameter, and the upper magnetic body 21, the non-magnetic body 22 and the lower magnetic body are arranged in order from the upstream side to the downstream side of the fuel flow. The body 23 is arranged adjacently. A cylindrical fixed core 30 is fixed to the inner peripheral surfaces of the upper magnetic body 21 and the nonmagnetic body 22. The valve body 40 is assembled to the inner peripheral surfaces of the non-magnetic body 22 and the lower magnetic body 23 in a movable state. The moving direction of the valve body 40 coincides with the direction of the central axis C (see FIG. 3) of the valve body 40.

  A sealing material 50 is attached to an end surface of the valve body 40 on the opposite side of the fixed core 30 in the central axis C direction. A nozzle hole body 60 in which a nozzle hole 60 a is formed is attached to an end of the lower magnetic body 23 opposite to the nonmagnetic material 22. The lower magnetic body 23 corresponds to a “valve body housing body” described in the claims.

  The portion of the lower magnetic body 23 in which the nozzle hole body 60 is inserted and assembled (hereinafter referred to as the enlarged diameter portion 23b) is the portion that accommodates the valve body 40 (hereinafter referred to as the valve body accommodating portion). In comparison, the diameter of the cylindrical inner peripheral surface is enlarged. In the example of FIG. 1, the outer diameter of the enlarged diameter portion 23 b is the same as the outer diameter of the valve body housing portion. That is, the thickness dimension of the enlarged diameter part 23b is smaller than the thickness dimension of the valve body housing part.

  As shown in FIG. 2, the nozzle hole 60 a has a shape extending around the central axis C of the valve body 40. A plurality of nozzle holes 60a are arranged side by side in the circumferential direction on the same circle. As shown in FIGS. 1 and 3, the nozzle hole body 60 includes a disk-shaped plate portion 61 in which the nozzle holes 60 a are formed, and a cylinder that extends in a cylindrical shape from the outer peripheral end of the plate portion 61 to the downstream side of the fuel flow. Part 62. The nozzle hole 60 a has a shape that penetrates the plate portion 61 in the direction of the central axis C. The plate portion 61 and the cylindrical portion 62 are integrally formed by pressing one metal base material.

  The surface of the plate portion 61 on the downstream side of the fuel flow has a flat shape extending perpendicularly to the central axis C. On the other hand, an inner lip portion 61 a and an outer lip portion 61 b that protrude toward the sealing material 50 are formed on the surface of the plate portion 61 on the upstream side of the fuel flow. The lip portions 61a and 61b have a shape that extends annularly around the central axis C. The inner lip portion 61a is located on the central axis C side with respect to the plurality of injection holes 60a, and the outer lip portion 61b is located on the opposite side of the central axis C with respect to the plurality of injection holes 60a. The lip portions 61 a and 61 b increase the surface pressure when the sealing material 50 is in close contact with the nozzle hole body 60 and improve the sealing performance between the sealing material 50 and the nozzle hole body 60.

  As shown in FIG. 3, the valve body 40 is formed with a central passage 42 through which fuel flows along the central axis C, and a branch passage 43 that branches from the central passage 42. These passages 42 and 43 are formed by drilling using a drill. An elastic member 32 is accommodated in an upstream portion (hereinafter referred to as a spring accommodating chamber 41) of the central passage 42, and a downstream end portion of the elastic member 32 is in contact with a downstream step portion of the spring accommodating chamber 41. Supported. The upstream end of the elastic member 32 is supported in contact with the adjustment member 31. The adjustment member 31 has a cylindrical shape and is press-fitted and fixed to the inner peripheral surface of the fixed core 30. The elastic force applied from the elastic member 32 to the valve body 40 is adjusted by the amount of insertion of the adjustment member 31 into the fixed core 30.

  When the power supply to the coil 20 is stopped, the valve body 40 is closed by the elastic force of the elastic member 32. As the valve body 40 is closed, the sealing member 50 comes into close contact with the injection hole body 60 and closes the injection hole 60a. Thereby, the fuel injection from the nozzle hole 60a is stopped.

  On the other hand, when power is supplied to the coil 20, the upper magnetic body 21, the fixed core 30, the valve body 40, the lower magnetic body 23, and the metal housing 11 form a magnetic circuit, and between the fixed core 30 and the valve body 40. Magnetic attraction is generated. Due to this magnetic attractive force, the valve body 40 moves toward the fixed core 30 (hereinafter referred to as lift-up), and stops moving when the upper end surface 40 a of the valve body 40 contacts the lower end surface 30 b of the fixed core 30. . That is, the gap between the upper end surface 40 a and the lower end surface 30 b when the valve is closed corresponds to the maximum lift amount of the valve body 40. When the valve body 40 is lifted up as described above, the sealing material 50 is separated from the lip portions 61a and 61b as shown in FIG. 4, and fuel is injected from the injection hole 60a as described below.

  That is, the fuel supplied from the fuel tank to the fuel injection valve 1 flows through the inside 21 a of the upper magnetic body 21, and then sequentially flows through the inside 31 a of the adjustment member 31, the inside 30 a of the fixed core 30, and the central passage 42. As indicated by an arrow F1 in FIG. 4, the fuel in the central passage 42 flows through the through hole 51 of the sealing material 50, and then the gap between the inner lip portion 61a and the sealing material 50 (hereinafter referred to as an inner clearance S1). ) To the inlet 60b (see FIG. 3) of the nozzle hole 60a.

  Further, as shown by an arrow F2 in FIG. 4, the fuel flowing from the central passage 42 to the branch passage 43 is fuel formed between the outer peripheral surface of the valve body 40 and the inner peripheral surface of the lower magnetic body 23. It flows into the reservoir chamber 23a. Thereafter, the fuel in the fuel reservoir chamber 23a flows into the inlet 60b (see FIG. 3) of the nozzle hole 60a through the gap between the outer lip portion 61b and the sealing material 50 (hereinafter referred to as the outer gap S2).

  In short, as shown by arrows F1 and F2, fuel flows into the inflow port 60b from both the outside and inside of the injection hole 60a. The fuel flowing into the inflow port 60b is injected from the nozzle hole 60a into the internal space of the cylindrical portion 62, flows into the intake pipe through the rubber hose as described above, and flows into the combustion chamber while mixing with the intake air.

  The fuel supplied to the fuel injection valve 1 is squeezed in the narrow portion of each passage described above and lost pressure, and then injected from the injection hole 60a. Therefore, the injection rate of the fuel injected from the injection hole 60a is greatly influenced by the flow path cross-sectional area of the narrowest portion (hereinafter referred to as the maximum throttle portion) and the pressure of the fuel supplied from the fuel tank ( That is, the fuel injection amount per unit time) is mainly determined.

  The flow path cross-sectional area (hereinafter referred to as the sheet throttle area) at the inlet 60b of the nozzle hole 60a is the sum of the areas of the inner gap S1 and the outer gap S2 at the time of maximum lift-up. That is, the sum of the area obtained by multiplying the peripheral length of the inner lip portion 61a by the maximum lift amount and the area obtained by multiplying the outer lip portion 61b by the peripheral length of the maximum lift amount is the sheet stop area. And it sets so that the location different from the lip | rip parts 61a and 61b may become a largest aperture | diaphragm | squeeze part.

  In the present embodiment, the flow passage cross-sectional area S3 (see FIG. 3) of the central passage 42 formed in the valve body 40 is set smaller than the seat restriction area, and the portion of the central passage 42 is the maximum restriction portion. It is set to be. In addition, it is desirable to set the ratio of the flow passage cross-sectional area S3 of the central passage 42 and the sheet throttle area to 1.4 or less, and in the present embodiment, the ratio is set to 0.99.

  The branch passage 43 has a shape extending in the radial direction of the valve body 40 and penetrates the cylindrical wall of the valve body 40. A one-dot chain line K in FIG. 3 is an imaginary line that indicates a position in the radial direction of the outlet 43 a of the branch passage 43, and is a line that extends parallel to the central axis C. The nozzle hole 60a is located farther from the central axis C than the outlet 43a of the branch passage 43 in the direction perpendicular to the central axis C (that is, the radial direction of the valve body 40). That is, the inflow port 60 b is located on the radially outer side of the valve body 40 with respect to the virtual line K. Specifically, the entire inflow port 60b is located on the radially outer side with respect to the virtual line K.

  In short, the fuel injection valve of the present embodiment described above has the characteristics listed below. And the effect demonstrated below is exhibited by each of those characteristics.

<Feature 1>
The sealing material 50 has a shape extending annularly around the central passage 42, and functions to seal the fuel flowing through the central passage 42 from the inner side of the ring and to seal the fuel flowing through the branch passage 43 from the outer side of the ring. . Therefore, since the sheet restriction is generated both on the inner side and the outer side of the sealing material 50, the degree of sheet drawing can be reduced as compared with the case where the sheet restriction is generated only on one side of the sealing material 50. Therefore, it is possible to reduce the degree of sheet drawing without increasing the maximum lift amount. That is, it can be said that the degree of the sheet stop can be reduced without increasing the required value of the magnetic attractive force generated by the power supply to the coil 20.

  On the premise of such a configuration, the nozzle hole 60 a having a shape extending around the central axis C is located outside the outlet 43 a of the branch passage 43. Therefore, the circumferential direction length of the nozzle hole 60a is longer than when the nozzle hole 60a is positioned on the inner side of the outlet 43a. Therefore, without increasing the nozzle hole 60a in the radial direction of the valve body 40, the opening area of the nozzle hole 60a (that is, the channel cross-sectional area) can be increased, and a sufficient injection rate can be ensured.

<Feature 2>
The entire inlet 60 b of the nozzle hole 60 a is located on the side farther from the central axis C than the outlet 43 a of the branch passage 43. According to this, since the nozzle hole 60a is located further outside, an increase in the opening area of the nozzle hole 60a can be promoted, and an increase in the injection rate can be promoted.

<Feature 3>
A valve body housing body (that is, the lower magnetic body 23) is formed in a cylindrical shape that houses the valve body 40, and an injection hole body 60 is inserted and assembled on the inner circumferential surface of the cylinder. And the part by which the injection hole body 60 is inserted and assembled among valve body accommodation bodies is the shape where the diameter dimension of the cylinder internal peripheral surface expanded compared with the part which accommodates a valve body inside.

  According to this, the nozzle hole body 60 can be enlarged in the radial direction by an amount corresponding to the increase in the diameter of the inserted and assembled portion. Therefore, since the nozzle hole 60a can be located further outside, an increase in the opening area of the nozzle hole 60a can be promoted, and an increase in the injection rate can be promoted.

<Feature 4>
The nozzle hole body 60 includes a plate portion 61 in which the nozzle holes 60 a are formed, and a cylindrical portion 62 that extends in a cylindrical shape from the outer peripheral end of the plate portion 61. And the plate part 61 and the cylindrical part 62 are integrally formed by processing one metal base material.

  Here, when the plate portion 61 and the cylindrical portion 62 are welded separately, contrary to the present embodiment, the limit position where the nozzle hole 60a is positioned radially outside cannot be sufficiently outside. That is, when machining the nozzle hole 60a in the plate portion 61, it is necessary to secure a large portion of the plate portion 61 on the radially outer side of the nozzle hole 60a, so that the nozzle hole 60a cannot be positioned sufficiently outside.

  On the other hand, according to the present embodiment, since the plate portion 61 and the cylindrical portion 62 are integrally formed, the nozzle hole 60a can be positioned sufficiently outside, so that the opening area of the nozzle hole 60a is increased. And the increase in the injection rate can be promoted.

<Feature 5>
Here, contrary to the present embodiment, when the lip portions 61a and 61b are set to the maximum throttle portion, the degree of squeezing at the maximum throttle portion changes when the thickness of the seal material 50 decreases due to wear due to the use of the seal material 50. As a result, the injection rate changes greatly. On the other hand, according to the present embodiment, since the portion different from the lip portions 61a and 61b (the central passage 42 in the example of FIG. 3) is set to be the maximum throttle portion, the seal material 50 is worn away. The change in the injection rate is suppressed.

(Second Embodiment)
In the first embodiment, the downstream surface of the plate portion 61 has a flat shape extending perpendicularly to the central axis C. On the other hand, in the present embodiment shown in FIG. 5, an inner guide wall 61 c and an outer guide wall 61 d that protrude downstream are formed on the downstream surface of the plate portion 61. The inner guide wall 61c is located on the central axis C side with respect to the nozzle hole 60a, and forms a tapered surface that is inclined so as to approach the central axis C from the upstream side toward the downstream side. The outer guide wall 61d is located on the opposite side of the central axis C with respect to the nozzle hole 60a, and forms a tapered surface that is inclined away from the central axis C from the upstream side toward the downstream side.

  In the first embodiment, the injection hole body 60 includes the plate portion 61 and the cylindrical portion 62. However, in the injection hole body 600 according to the present embodiment, the cylindrical portion 62 is omitted. A cylindrical portion 23c extending downstream from the nozzle hole 60a is provided at the downstream end of the lower magnetic body 23, and the outer peripheral end of the plate portion 61 is fitted into the inner peripheral surface of the cylindrical portion 23c. It is. In other words, in the first embodiment, the plate portion 61 and the cylindrical portion 62 are integrally formed, whereas in the present embodiment, the plate portion 61 and the cylindrical portion 23c are formed separately.

  Also according to the present embodiment, since the nozzle hole 60a is located outside the outlet 43a of the branch passage 43, the opening area of the nozzle hole 60a can be increased and a sufficient injection rate can be obtained as in the first embodiment. It can be secured. Further, by providing the guide walls 61c and 61d, the flow velocity distribution of the fuel injected from the injection hole 60a is adjusted to a desired distribution.

(Other embodiments)
The present invention is not limited to the description of the above embodiment, and may be modified as follows. Moreover, you may make it combine the characteristic structure of each embodiment arbitrarily, respectively.

  -In the said 1st Embodiment, the whole inflow port 60b is located in the radial direction outer side with respect to the virtual line K. As shown in FIG. On the other hand, a part of the inflow port 60b may be located radially outside the virtual line K.

  In the first embodiment, the central passage 42 is set to be the maximum throttle portion. On the other hand, the sum of the channel cross-sectional areas of the plurality of nozzle holes 60a is set to be smaller than the channel cross-sectional area S3 of the central passage 42, and the nozzle hole 60a is set to be the maximum throttle portion. May be.

  In the first embodiment, the flow passage cross-sectional area S3 of the central passage 42 is set smaller than the sheet throttle area. On the other hand, the sheet throttle area may be set smaller than the flow path cross-sectional area S3 of the central passage 42.

  -In the said 1st Embodiment, it is the structure which supplies the fuel injected from the fuel injection valve 1 to an intake pipe with rubber piping. On the other hand, the fuel injection valve 1 may be directly attached to the intake pipe and directly injected into the intake pipe. Alternatively, the fuel injection valve 1 may be mounted so that fuel is directly injected into the combustion chamber of the internal combustion engine.

  -In the said 1st Embodiment, although the four nozzle holes 60a are formed, the lower figure of the nozzle hole 60a is not restricted to four. The number of nozzle holes 60a is not limited to a plurality, and may be one. However, the nozzle hole 60a needs to have a shape extending around the central axis C.

  The fuel injection valve according to the first embodiment is mounted so as to flow into the intake pipe of the internal combustion engine through a rubber hose (not shown). On the other hand, the fuel injection valve may be attached to the intake pipe, or may be attached to a cylinder head or a cylinder block so as to inject gaseous fuel directly into the combustion chamber.

  The fuel injection valve according to the first embodiment injects gaseous fuel used for combustion of the internal combustion engine, but may inject gaseous fuel such as hydrogen supplied to the fuel cell.

  DESCRIPTION OF SYMBOLS 1 ... Fuel injection valve, 40 ... Valve body, 42 ... Center passage, 43 ... Branch passage, 43a ... Outlet of branch passage, 50 ... Sealing material, 60a ... Injection hole, 60, 600 ... Injection hole body, C ... Valve The center axis of the body.

Claims (4)

An injection hole body ( 60, 600) having a plate portion (61) in which an injection hole (60a) through which gaseous fuel is injected is formed;
A valve element that operates so as to open and close the nozzle hole, and a central passage (42) that circulates fuel along a central axis (C) of the valve body, and a branch passage (43) that branches from the central passage A valve body (40) formed with
A seal member (50) attached to the valve body and closing the nozzle hole in close contact with the nozzle hole body as the valve element is closed;
The sealing material has a shape extending annularly around the central passage, seals the fuel flowing through the central passage from the annular inner side with respect to the injection hole, and supplies the fuel flowing through the branch passage to the injection hole. Against the outside of the ring,
The nozzle hole has a shape extending around the central axis, and is positioned on the side farther from the central axis than the outlet (43a) of the branch passage in the direction perpendicular to the central axis .
The plate portion is formed with an inner guide wall (61c) and an outer guide wall (61d) projecting on the downstream side of the fuel flow on the downstream surface of the fuel flow,
The inner guide wall is located on the central axis side with respect to the nozzle hole, and has a tapered surface inclined so as to approach the central axis from the upstream side to the downstream side of the fuel flow,
The outer guide wall, characterized in that it have a tapered surface located on the opposite side of the central axis with respect to the injection hole is inclined from the upstream side of the fuel flow away from the central axis toward the downstream side Fuel injection valve.   2. The fuel injection valve according to claim 1, wherein the entire inlet (60 b) of the nozzle hole is located on a side farther from the central axis than the outlet of the branch passage. A valve body housing body (23) formed in a cylindrical shape for housing the valve body therein, and having the nozzle hole body inserted and assembled on the inner peripheral surface of the cylinder,
Portion where the injection hole body is assembled inserted among the valve body accommodating body is characterized in that diameter of the cylindrical inner peripheral surface is enlarged shape than the portion for accommodating the valve body therein The fuel injection valve according to claim 1 or 2. The plate portion has a disc shape,
The injection hole body further comprises from the outer peripheral edge of the front Symbol plate portion cylindrical portion extending cylindrical downstream of the fuel flow (62),
The fuel injection valve according to any one of claims 1 to 3, wherein the plate portion and the cylindrical portion are integrally formed by processing one metal base material.

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