JP2016145550A - Fuel supply device and fuel supply unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel supply device which inhibits occurrence of peeling of gas fuel flow and reduces flow noise, and to provide a fuel supply unit.SOLUTION: A fuel injection device 1 injects a gas fuel from a discharge hole 62 to supply the gas fuel while adjusting a flow rate. The fuel injection device 1 includes: an open part 59 which is formed so as to connect to a downstream side of the discharge hole 62 and has a diameter larger than that of the discharge hole 62; and a peeling inhibition member 80 which inhibits occurrence of peeling of gas fuel flow when the gas fuel flows from the discharge hole 62 to the open part 59. The peeling inhibition member 80 is disposed in the open part 59.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fuel supply device and a fuel supply unit for supplying gas fuel.

  In the fuel supply device, when the gas fuel is supplied, the gas fuel flow may be separated due to a sudden change in the cross-sectional area of the flow path, and an air flow noise may be generated. Therefore, a fuel supply device that suppresses leakage of noise to the outside has been proposed.

  As this type of fuel supply device, for example, a nozzle member is fixed to the front end portion of a valve housing that contains a gas fuel passage and accommodates a valve body, and a valve seat that faces the gas fuel passage, A valve hole that passes through the center and is opened and closed by the cooperation of the valve body and the valve seat, a first throttle hole that continues to the outlet of the valve hole, and a first annular step portion at the outlet of the first throttle hole A nozzle hole having a diameter larger than that of the continuous first throttle hole is provided, and the nozzle hole is provided with a second throttle hole having a diameter smaller than that of the nozzle hole connected via the second annular step part facing the first annular step part. There is. The second annular step portion and the second throttle hole are formed in an annular member separate from the nozzle member coupled to the front end portion of the nozzle member.

  In such a fuel supply apparatus, even when the air flow noise (noise) generated by the separation of the gas fuel flow is generated in the nozzle hole by the second annular step portion and the second throttle hole provided at the front end portion of the nozzle member. The leakage of the noise to the outside can be suppressed (see Patent Document 1).

JP 2014-55569 A

  However, in the above fuel supply device, by providing the second annular stepped portion and the second throttle hole at the front end portion of the nozzle member, airflow noise (noise) generated by separation of the gas fuel flow is generated in the nozzle hole. In some cases, leakage of the noise to the outside is suppressed, but flow separation that causes noise occurs. For this reason, since the generation of the airflow sound itself cannot be reduced, the airflow sound may leak to the outside.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a fuel supply device and a fuel supply unit that can suppress the occurrence of gas fuel flow separation and reduce airflow noise. With the goal.

  One form of the present invention made to solve the above problems is formed so as to be connected to the downstream side of the discharge hole in a fuel supply device that adjusts the flow rate and injects and supplies gas fuel from the discharge hole. An opening portion having a diameter larger than that of the discharge hole, and a separation suppressing member that suppresses the occurrence of separation of the gas fuel flow when the gas fuel flows out from the discharge hole to the opening portion. It is arranged in the opening part or in the discharge hole.

  In this fuel supply device, when the gas fuel flows out from the discharge hole to the open portion, the gas fuel is decelerated and the occurrence of separation of the gas fuel flow is suppressed by the separation suppressing member disposed in the open portion or the discharge hole. The Therefore, it is possible to reduce the air flow noise generated by the separation of the gas fuel flow.

  In the fuel supply apparatus described above, it is desirable that the separation suppressing member is composed of a porous body or a mesh.

  With such a configuration, the gas fuel flowing out from the discharge hole collides with the porous body or mesh before accelerating, so that it is decelerated and diffused. Therefore, separation of the gas fuel flow can be reliably suppressed. Therefore, it is possible to reliably reduce the air flow noise generated by the separation of the gas fuel flow.

  In the fuel supply apparatus described above, it is desirable that the downstream end surface of the separation suppressing member is formed in a spherical shape.

  By setting it as such a structure, the gas fuel which flows out from a peeling suppression member can be diffused. Thereby, separation of the gas fuel flow can be further suppressed. Therefore, it is possible to further reduce the airflow noise generated by the separation of the gas fuel flow.

  Furthermore, in the fuel supply device described above, a part of the separation suppressing member is disposed so as to protrude from the open portion or the discharge hole, and the separation suppressing member is disposed at a downstream end portion of the separation suppressing member. A shielding plate that blocks outflow of gas fuel from the downstream end face is preferably provided.

  With this configuration, the gas fuel that has passed through the separation suppressing member flows out from the side surface of the opening or the portion that protrudes from the discharge hole by the shielding plate, so that the gas fuel that flows out from the separation suppressing member is reliably diffused. Can be made. Thereby, separation of the gas fuel flow can be further suppressed. Therefore, it is possible to further reduce the airflow noise generated by the separation of the gas fuel flow.

  Here, in the case where the separation suppressing member is formed of a porous body, in the fuel supply device described above, the porous body is disposed in the open portion and connected to the discharge hole so that the gas fuel is supplied. You may have a through-hole penetrating in the flow direction.

  By having such a through-hole in the porous body (peeling suppression member), it is possible to suppress an abrupt change in the cross-sectional area of the flow path, and to suppress the acceleration of the gas fuel by passing through the through-hole. From these things, since separation of the gas fuel flow can be suppressed, airflow noise generated by the separation of the gas fuel flow can be reduced.

  Another aspect of the present invention made to solve the above problems is that at least one fuel injection device that adjusts and injects a flow rate of gas fuel, and gas fuel that is injected from the fuel injection device are derived. A fuel supply unit having a lead-out passage has a flow restricting member forcibly flowing gas fuel flowing out from the discharge hole of the fuel injection device toward the lead-out passage in the radial direction of the discharge hole. .

  In this fuel supply unit, the gas fuel flowing out from the discharge hole of the fuel injection device flows in the circumferential direction toward the outlet passage by the flow regulating member. Therefore, the gas fuel is diffused in the outlet passage and decelerated. Thereby, separation of the gas fuel flow is suppressed. Therefore, it is possible to reduce the air flow noise generated by the separation of the gas fuel flow.

  In the fuel supply unit described above, it is desirable that the flow restricting member is integrally formed with the outlet passage.

  With such a configuration, the flow regulating member can be provided easily and inexpensively. In addition, the number of parts can be reduced as compared to the case where the flow restricting member is provided separately, and the work for joining the flow restricting member is not required, so that the production efficiency is improved, so the fuel supply unit is provided at a lower cost. be able to.

  According to the fuel supply device and the fuel supply unit according to the present invention, it is possible to suppress the occurrence of separation of the gas fuel flow and reduce the airflow noise.

It is sectional drawing of the fuel-injection apparatus in 1st Embodiment. It is an expanded sectional view near a valve seat. It is a figure which shows a 1st modification. It is a figure which shows a 2nd modification. It is a figure which shows a 3rd modification. It is a figure which shows a 4th modification. It is sectional drawing of the fuel supply unit in 2nd Embodiment. It is an expanded sectional view near the front-end | tip part of the fuel injection apparatus with which a fuel supply unit is equipped. It is an expanded sectional view near the front-end | tip part of the fuel injection apparatus with which a fuel supply unit is equipped.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the fuel supply device and the fuel supply unit of the present invention will be described below in detail with reference to the drawings. Here, an example in which the present invention is applied when gas fuel (for example, hydrogen) is supplied to a fuel cell (not shown) is illustrated.

[First Embodiment]
First, an outline of the overall configuration of the fuel injection device (injector) according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view of the fuel injection device in the present embodiment. FIG. 2 is an enlarged sectional view of the vicinity of the valve seat.
As shown in FIG. 1, the fuel injection device 1 includes a main body 10, a valve body 12, a valve seat 14, a compression spring 16, a separation suppressing member 80, and the like.

  The main body 10 includes a housing 24, a stator core 26, a casing 28, an electromagnetic coil 30, and the like. The main body 10 houses a valve body 12, a valve seat 14, a compression spring 16, and the like. A fuel flow path 34 through which gas fuel flows is formed inside the main body 10.

  The housing 24 is formed so as to surround a part of the stator core 26 and a part of the casing 28. The housing 24 is made of resin, and the electromagnetic coil 30 is embedded therein. The electromagnetic coil 30 is disposed at a position surrounding the stator core 26. The electromagnetic coil 30 is a drive unit that drives the valve body 12 to bring the valve body 12 into and out of contact with the valve seat 14. The housing 24 also includes a connector portion 38 provided with a plurality of terminal pins 36. The terminal pin 36 is electrically connected to the electromagnetic coil 30.

  The stator core 26 is disposed on the side opposite to the valve seat 14 side with respect to the valve body 12. The stator core 26 is formed in a substantially cylindrical shape (including a true cylindrical shape or an elliptical cylindrical shape), and includes a through hole 26a at the center thereof. The through hole 26 a constitutes the upstream portion of the fuel flow path 34. The upstream end (upper end in FIG. 1) of the stator core 26 is connected to an external fuel supply unit (not shown). The stator core 26 is made of a soft magnetic material (for example, electromagnetic stainless steel).

  The casing 28 is arranged at a position downstream of the stator core 26 in the flow direction of the gas fuel (lower side in FIG. 1). The casing 28 is formed in a substantially cylindrical shape, and has a through hole 28a at the center thereof. The casing 28 is made of a soft magnetic material (for example, electromagnetic stainless steel). The casing 28 accommodates the valve body 12 and the valve seat 14 in the through hole 28a.

  The valve body 12 is disposed at a position upstream of the valve seat 14 in the flow direction of the gas fuel (upper side in FIG. 1) in the through hole 28 a of the casing 28. The valve body 12 is formed of a soft magnetic material (for example, electromagnetic stainless steel). The valve body 12 is urged toward the valve seat 14 by a compression spring 16.

  The valve body 12 is formed in a bottomed cylindrical shape (substantially cylindrical shape), that is, formed so as to have a cylindrical portion and a bottom portion. Specifically, the valve body 12 includes a substantially cylindrical tubular portion 40 corresponding to a bottomed tubular cylindrical portion, a substantially disc-shaped seal portion 42 corresponding to a bottomed tubular bottom portion, and the like. It has. A flow path 44 is formed in the tubular portion 40, and the flow path 44 is a part of the fuel flow path 34. The seal portion 42 is a portion that contacts and separates from the valve seat 14 and is formed of rubber, resin, or the like.

  The valve seat 14 is disposed at a position downstream of the valve body 12 in the flow direction of the gas fuel (the lower side in FIG. 1) in the through hole 28 a of the casing 28. The valve seat 14 is a member with which the valve body 12 abuts and separates. The valve seat 14 is fixed to the casing 28 by being press-fitted into the casing 28, by welding the valve seat 14 and the casing 28 over the entire circumference, or by both press-fitting and welding.

  The valve seat 14 includes a seat portion 56, a side wall portion 58, and the like. The sheet portion 56 is formed in a disc shape. The sheet portion 56 includes a sheet surface 60 and discharge holes 62. The seat surface 60 is a surface formed on the valve body 12 side in the seat portion 56, and is a surface on which the seal portion 42 of the valve body 12 abuts and separates. The discharge hole 62 is a hole that penetrates the sheet portion 56 in the axial direction of the sheet portion 56 in the central portion of the sheet portion 56. The discharge holes 62 are gas fuel flow paths. The side wall portion 58 is formed in a cylindrical shape so as to extend in the axial direction of the valve body 12 from the seat portion 56 toward the side opposite to the valve body 12 side. As a result, an opening 59 having a larger diameter than the discharge hole 62 is formed inside the side wall 58, and the opening 59 is connected to the downstream side of the discharge hole 62.

And in such an open part 59, as shown in FIG. 2, the peeling suppression member 80 is provided. The peeling suppressing member 80 is fixed to the opening portion 59 by being press-fitted, welded, or caulked to the opening portion 59. The separation suppressing member 80 is for suppressing the occurrence of separation of the gas fuel flow when the gas fuel flows out from the discharge hole 62 to the opening portion 59. In the present embodiment, a porous body such as a sintered filter is used as the peeling suppressing member 80 and is filled in the open portion 59.
In the present embodiment, the peeling suppressing member 80 is filled and arranged in almost the entire area within the opening 59, but it is not necessary to be filled and arranged in the whole area, and may be partially filled. However, when partly filling and disposing, the peeling suppressing member 80 needs to be disposed at least at the connection portion with the discharge hole 62 (the uppermost stream side of the opening 59).

  Moreover, in this embodiment, although the porous body is used as the peeling suppression member 80, it is not limited to a porous body, For example, a mesh can also be used. When the mesh is used as the peeling suppressing member 80, it is sufficient that the mesh is disposed on the outer peripheral portion of the peeling suppressing member 80 (formed with a mesh in a bowl shape), but the mesh can be further disposed inside. . Further, the peeling suppressing member 80 may be configured by overlapping a plurality of meshes. When a plurality of meshes are stacked, ones having different mesh roughness can be used.

  Next, the operation (operation) of the fuel injection device 1 will be described. First, when the electromagnetic coil 30 is not energized via the terminal pin 36 of the connector portion 38, that is, when the valve is closed, the sealing of the valve body 12 is performed by the urging force of the compression spring 16 as shown in FIG. The portion 42 is in contact with the seat surface 60 of the valve seat 14. Therefore, the discharge hole 62 of the valve seat 14 is cut off from the fuel flow path 34. Therefore, the gas fuel is not discharged from the discharge hole 62 to the outside of the fuel injection device 1.

  On the other hand, when the electromagnetic coil 30 is energized via the terminal pin 36 of the connector portion 38, that is, when the valve is opened, the electromagnetic coil 30 generates a magnetic field, and the valve body 12 and the stator core 26 are excited. Then, since the valve body 12 and the stator core 26 attract each other, the valve body 12 moves to the stator core 26 side. That is, the seal portion 42 of the valve body 12 is separated from the seat surface 60 of the valve seat 14. Therefore, the discharge hole 62 of the valve seat 14 communicates with the fuel flow path 34. Thereby, the gas fuel flowing in the fuel flow path 34 flows into the discharge hole 62, and the gas fuel is discharged from the discharge hole 62 to the outside of the fuel injection device 1.

  At this time, since a rapid change in the cross-sectional area of the flow path occurs in the open portion 59, the gas fuel flow may be peeled off and airflow noise (noise) may be generated. However, in the fuel injection device 1, the gas fuel released from the discharge hole 62 flows into the separation suppressing member 80 and collides with the porous body (or mesh) before accelerating. Therefore, since the gas fuel is decelerated and diffused, separation of the gas fuel flow can be reliably suppressed in the open portion 59. Thereby, the airflow sound produced by the separation of the gas fuel flow can be reliably reduced.

  Here, a modification of the first embodiment will be described with reference to FIGS. FIG. 3 is a diagram illustrating a first modification. FIG. 4 is a diagram illustrating a second modification. FIG. 5 is a diagram illustrating a third modification. FIG. 6 is a diagram illustrating a fourth modification. In addition, about the component equivalent to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted and it mainly describes a different point.

In the first modified example, as shown in FIG. 3, the downstream end surface 81 of the peeling suppressing member 80 a disposed in the open portion 59 is formed in a spherical shape. By making the peeling suppressing member 80a into such a shape, the gas fuel flowing out from the peeling suppressing member 80a can be diffused. Therefore, according to the first modification, the separation of the gas fuel flow can be further suppressed, and the airflow sound generated by the separation of the gas fuel flow can be further reduced.
In FIG. 3, the spherically shaped portion (downstream end surface 81) of the peeling suppressing member 80 a protrudes from the open portion 59, but the spherical portion may be located in the open portion 59.

  In the second modified example, as shown in FIG. 4, the peeling suppressing member 80 b is disposed not in the opening portion 59 but in the discharge hole 62. Thereby, the fuel gas is decelerated in the discharge hole 62. And also in the peeling suppressing member 80b, the downstream end face 81 is formed in a spherical shape, similarly to the first modified example. Therefore, the gas fuel flowing out from the peeling suppressing member 80 b (that is, the discharge hole 62) can be diffused in the open portion 59. Therefore, also in the second modified example, separation of the gas fuel flow at the open portion 59 can be suppressed, and airflow noise generated by the separation of the gas fuel flow can be reduced.

  In the third modified example, as shown in FIG. 5, the peeling suppressing member 80 c is disposed so as to protrude from the open portion 59, and a shielding plate 82 is provided at the downstream end of the peeling suppressing member 80 c. This shielding plate 82 shields the outflow of gas fuel from the downstream end face of the peeling suppressing member 80c. Thereby, the gas fuel that has passed through the peeling suppressing member 80 c flows out from the side surface of the portion protruding from the opening 59 by the shielding plate 82. Therefore, the gas fuel flowing out from the peeling suppressing member 80c can be reliably diffused. Therefore, according to the third modification, the separation of the gas fuel flow can be further suppressed, and the airflow sound generated by the separation of the gas fuel flow can be further reduced.

  Here, when the protrusion amount (protrusion height) of the peeling suppressing member 80c is small, there is a possibility that the required flow rate of the fuel gas cannot be secured. Therefore, in the third modification, the protrusion amount (protrusion height) H of the peeling suppressing member 80c is set to 1/8 to 1/2 (H = D / 8 to D / 2) of the diameter D of the peeling suppressing member 80c. It is set. The projecting amount H is set in such a range. If the projecting amount H is smaller than D / 8, the required flow rate of the fuel gas may not be ensured, while the projecting amount H is more than D / 2. This is because the diffusion effect of the fuel gas by the shielding plate 82 cannot be obtained.

  In addition, about a 1st-3rd modification, a porous body may be used as a peeling suppression member, and a mesh may be used.

  In the fourth modified example, the peeling suppressing member 80d is formed of a porous body, and as shown in FIG. 6, the peeling suppressing member 80d is connected to the discharge hole 62 and penetrates in the gas fuel flow direction. A through hole 83 is formed. By having such a through hole 83 in the peeling suppressing member 80d, it is possible to suppress a rapid change in the cross-sectional area of the flow path and to suppress the acceleration of the gas fuel by passing through the through hole 83. Accordingly, even in the fourth modified example, the separation of the gas fuel flow can be suppressed, so that the airflow noise generated by the separation of the gas fuel flow can be reduced. The diameter d2 of the through hole 83 is set to be twice or less than the diameter d1 of the discharge hole 62 (d2 ≦ 2 × d1). This is because if the diameter d2 of the through hole 83 exceeds twice the diameter d1 of the discharge hole 62, acceleration of the gas fuel cannot be suppressed by the through hole 83.

  As described above in detail, according to the fuel injection device 1 according to the first embodiment, the separation suppressing member 80 (80a to 80d) is disposed in the opening portion 59 (or the discharge hole 62). The gas fuel released from 62 flows into the separation preventing member 80 (80a to 80d) before accelerating, is decelerated, diffuses, and flows out. Therefore, the separation of the gas fuel flow can be reliably suppressed in the open portion 59, and the airflow noise generated by the separation of the gas fuel flow can be reliably reduced.

[Second Embodiment]
Next, an outline of the overall configuration of the fuel supply unit according to the second embodiment will be described with reference to FIGS. FIG. 7 is a cross-sectional view of the fuel supply unit in the second embodiment. 8 and 9 are enlarged cross-sectional views of the vicinity of the tip of the fuel injection device provided in the fuel supply unit.
As shown in FIG. 7, the fuel supply unit 124 includes an introduction block 144, a derivation block 146, a fuel injection device (injector) 148, a secondary pressure sensor 150, a tertiary pressure sensor 152, and the like.

  The introduction block 144 is a member that distributes the fuel gas to the fuel injection device 148. The introduction block 144 includes an introduction passage 158, a recess 160, an introduction hole 162, a sensor hole 164, and the like.

The introduction passage 158 is a passage through which fuel gas is introduced. A fuel injection device 148 is disposed inside the recess 160.
The introduction hole 162 is formed between the introduction passage 158 and the recess 160. An inlet pipe 148 b on the inlet side of the fuel injection device 148 is fitted into the introduction hole 162. In the example shown in FIG. 7, inlet pipes 148 b of three fuel injection devices 148 are connected in parallel to the introduction passage 158. Further, the secondary pressure sensor 150 is fitted in the sensor hole 164. The introduction block 144 is fastened to the lead-out block 146 with bolts 154.

  The derivation block 146 is a member that joins the fuel gas injected from the fuel injection device 148. The lead block 146 includes a lead passage 168, a flow restricting member 169, a sensor hole 172, and the like. The derivation block 146 has a two-part structure.

  The lead-out passage 168 is a passage through which fuel gas injected from the fuel injection device 148 is led out. A flow restricting member 169 is provided in the outlet passage 168. The flow restricting member 169 forcibly flows (that is, diffuses) the gas fuel flowing out from the discharge hole 62 of the fuel injection device 148 toward the outlet passage 168 in the radial direction of the discharge hole 62. A tertiary pressure sensor 152 is fitted in the sensor hole 172.

  Here, in this embodiment, the flow restriction member 169 is configured separately from the derivation block 146, but the flow restriction member 169 may be integrally formed with the derivation block 146. Thereby, a flow control member can be provided easily and inexpensively. In addition, the number of parts can be reduced as compared with the case where a flow restricting member is provided separately, and the work for joining the flow restricting member is not required, so that the production efficiency is improved. Can be provided.

  The fuel injection device 148 is disposed so as to be sandwiched between the introduction block 144 and the lead-out block 146. As shown in FIGS. 7 and 8, the fuel injection device 148 is disposed so as to slightly protrude into the outlet passage 168 so that its tip (discharging hole tip) faces the flow regulating member 169. Note that the tip of the fuel injection device 148 may be disposed at the same position as the inner surface of the outlet passage 168 as shown in FIG.

The fuel injection device 148 is connected to the introduction passage 158 and the outlet passage 168 and adjusts the flow rate of the fuel gas. The fuel injection device 148 has the same basic configuration as that of the first embodiment, but the valve seat is not formed with an open portion, only a nozzle hole is formed, and a separation suppressing member It is different in that it does not have. In addition, as the fuel injection device 148, the one exemplified in the first embodiment can be used.
In the example shown in FIG. 7, the fuel supply unit 124 has three fuel injection devices 148. The number of fuel injection devices 148 is not particularly limited, and may be one, two, or four or more.

  Here, the positional relationship between the fuel injection device 148 and the flow restricting member 169 will be briefly described. As shown in FIG. 8, the flow restricting member 169 has an interval S between the tip of the fuel injection device 148 and the flow restricting member 169 that is ¼ to ½ of the diameter d1 of the discharge hole 62 in the fuel injection device 148 ( S = d1 / 4 to d1 / 2). The interval S is set in such a range. If the interval S is smaller than d1 / 4, the required flow rate of the fuel gas may not be ensured, while the interval S becomes larger than d1 / 2. This is because the fuel gas dispersion effect cannot be obtained.

  In such a fuel supply unit 124, the fuel gas introduced into the introduction passage 158 is supplied to the outlet passage 168 by the fuel injection device 148. At this time, since a rapid change in the cross-sectional area of the flow path occurs in the lead-out passage 168, separation of the gas fuel flow may occur, and airflow noise (noise) may occur.

  However, in the fuel supply unit 124, the gas fuel released from the discharge hole 62 of the fuel injection device 148 hits the flow regulating member 169 before accelerating and flows in the radial direction of the discharge hole 62. As a result, the gaseous fuel released from the discharge hole 62 of the fuel injection device 148 is diffused in the outlet passage 168. For this reason, the gas fuel injected from the fuel injection device 148 is decelerated and diffused by the flow restricting member 169, so that separation of the gas fuel flow can be reliably suppressed in the outlet passage 168. Thereby, the airflow sound produced by the separation of the gas fuel flow can be reliably reduced.

  As described above, according to the fuel supply unit 124 according to the second embodiment, the flow restricting member 169 is provided in the outlet passage 168 so as to face the discharge hole 62 of the fuel injection device 148. The gas fuel injected from the discharge hole 62 is decelerated and diffused by the flow regulating member 169 before accelerating. Therefore, separation of the gas fuel flow can be reliably suppressed in the lead-out passage 168, and airflow noise generated by the separation of the gas fuel flow can be reliably reduced.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the case where hydrogen gas is supplied as the fuel gas has been exemplified. However, the present invention can also be applied to an apparatus for supplying gas fuel other than hydrogen (for example, natural gas). .

DESCRIPTION OF SYMBOLS 1 Fuel injection apparatus 12 Valve body 14 Valve seat 34 Fuel flow path 42 Sealing part 59 Opening part 60 Seat surface 62 Discharge hole 80 Peeling suppression member 80a Peeling suppression member 80b Peeling suppression member 80c Peeling suppression member 80d Peeling suppression member 81 Downstream end face 82 Shielding plate 83 Through-hole 124 Fuel supply unit 144 Introduction block 146 Lead-out block 148 Fuel supply device 158 Introduction passage 168 Lead-out passage 169 Flow regulating member

Claims (7)

In a fuel supply device that adjusts the flow rate and injects and supplies gas fuel from the discharge hole,
An opening having a diameter larger than that of the discharge hole formed to connect to the downstream side of the discharge hole;
A stripping suppression member that suppresses the occurrence of stripping of the gas fuel flow when the gas fuel flows out from the discharge hole to the open portion;
The fuel supply apparatus according to claim 1, wherein the peeling suppressing member is disposed in the open portion or the discharge hole. The fuel supply device according to claim 1,
The fuel supply apparatus according to claim 1, wherein the separation suppressing member is made of a porous body or a mesh. In the fuel supply device according to claim 1 or 2,
The fuel supply apparatus according to claim 1, wherein a downstream end surface of the separation suppressing member is formed in a spherical shape. In the fuel supply device according to any one of claims 1 to 3,
A part of the peeling suppressing member is arranged to protrude from the opening or the discharge hole,
The fuel supply apparatus according to claim 1, wherein a shielding plate is provided at a downstream end portion of the separation suppressing member to block outflow of gaseous fuel from a downstream end surface of the separation suppressing member. The fuel supply device according to claim 1,
The peeling suppressing member is made of a porous body,
The porous body has a through-hole disposed in the open portion and connected to the discharge hole and penetrating in a gas fuel flow direction. In a fuel supply unit having at least one fuel injection device that adjusts and injects a flow rate of gas fuel, and a lead-out passage through which gas fuel injected from the fuel injection device is led,
A fuel supply unit comprising: a flow regulating member that forcibly flows the gas fuel flowing out from the discharge hole of the fuel injection device toward the outlet passage in the radial direction of the discharge hole. The fuel supply unit according to claim 6, wherein
The fuel supply unit, wherein the flow restricting member is integrally formed with the outlet passage.

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