JP2019071353A - Gas fuel supply device - Google Patents

Abstract

To provide a gas fuel supply device capable of reducing sliding resistance of a movable core while improving magnetic attraction force in an axial direction.SOLUTION: In a fuel injection device 1, a movable core 54 includes a first movable corner 82 and a second movable corner 83 positioned radially outward of the first movable corner 82, and a fixed core 52 includes a first fixed corner 75 corresponding to the first movable corner 82 and a second fixed corner 76 corresponding to the second movable corner 83, and while a coil 50 is energized, a first magnetic circuit M1 in which a magnetic flux flows is formed between the first movable corner 82 and the first fixed corner 75, and a second magnetic circuit M2 in which a magnetic flux flows is formed between the second movable corner 83 and the fixed corner portion 76, and magnetic attraction force in a direction perpendicular to the axial direction generated by the first magnetic circuit M1 is generated radially inward, and the magnetic attraction force in a direction perpendicular to the axial direction generated by the second magnetic circuit M2 is generated radially outward.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a gas fuel supply device using a linear solenoid to adjust the flow rate of gas fuel supplied from a fuel container to a supply destination.

  As a gas fuel supply apparatus, there is an apparatus using a linear solenoid to adjust the flow rate of gas fuel supplied from a fuel container to a supply destination. As a linear solenoid used for such an apparatus, there exist some which were described in patent document 1, for example. The linear solenoid includes a coil, a fixed core provided in the coil, and a movable core coaxially opposed to the fixed core.

  The fixed core has a first suction portion in which a tapered recess is formed at an end facing the movable core, and an annular second suction portion provided closer to the movable core than the first suction portion. The second suction portion is formed with a cylindrical inner peripheral surface which is continuous with the side surface of the recess. As a result, in this linear solenoid, while achieving miniaturization, a flat attraction force characteristic that is not affected by the movement and displacement of the movable iron core under a constant current is realized.

Unexamined-Japanese-Patent No. 2000-277327

  However, when the above-described linear solenoid is used for the gas fuel supply device to improve the axial magnetic attraction (valve opening force necessary for valve opening), the magnetic in the direction (radial outer direction) orthogonal to the axial direction at the same time The suction power also increases. As a result, the sliding resistance of the movable core increases, which may lead to a decrease in durability, a decrease in responsiveness, an increase in hysteresis, and the like.

  Therefore, the present disclosure has been made to solve the above-described problems, and provides a gas fuel supply device capable of reducing the sliding resistance of the movable iron core while improving the magnetic attraction force in the axial direction. The purpose is to

One mode of the present disclosure made to solve the above problems is
Linear having a coil, a fixed core, a movable core attracted to the fixed core by energization of the coil, a spring urging the movable core away from the fixed core, and a yoke covering the coil A gas fuel supply apparatus comprising a solenoid unit, wherein the linear solenoid unit adjusts the flow rate of gas fuel by changing a distance between a valve body moving with the movable core and a valve seat fixed to the housing.
The movable core includes a first movable corner and a second movable corner located radially outward of the first movable corner.
The fixed core includes a first fixed corner corresponding to the first movable corner and a second fixed corner corresponding to the second movable corner.
When the coil is energized,
A first magnetic circuit in which a magnetic flux flows is formed between the first movable corner portion and the first fixed corner portion,
A second magnetic circuit in which magnetic flux flows is formed between the second movable corner and the second fixed corner.
The magnetic attraction force in the direction orthogonal to the axial direction acting on the movable core is reduced by the interaction between the magnetic attraction force generated by the first magnetic circuit and the magnetic attraction force generated by the second magnetic circuit. It is characterized by

  In this gas fuel supply device, the first magnetic circuit in which magnetic flux flows between the first movable corner of the movable core and the first fixed corner of the fixed core in the linear solenoid when the coil is energized. Two magnetic circuits are formed between the second movable corner of the movable core and the second fixed corner of the fixed core, in which a magnetic flux flows. Then, the magnetic attraction force in the direction orthogonal to the axial direction acting on the movable core is reduced by the interaction between the magnetic attraction force generated by the first magnetic circuit and the magnetic attraction force generated by the second magnetic circuit. ing. That is, by adjusting the direction of the magnetic attraction force generated in each of the first magnetic circuit and the second magnetic circuit, the magnetic attraction force in the axial direction is improved, and the radial outward direction orthogonal to the axial direction is improved. Magnetic attraction can be reduced. For example, the magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit may be generated radially inward.

  Therefore, since the radially outward magnetic attraction force acting on the movable core is reduced, the sliding resistance of the movable core can be reduced. As a result, in the gas fuel supply device, it is possible to improve the durability, improve the responsiveness, and reduce the hysteresis.

And, in the above-described gas fuel supply device,
When power is supplied to the coil, a magnetic attraction force in a direction perpendicular to the axial direction generated by the first magnetic circuit is generated radially inward, and a direction perpendicular to the axial direction generated by the second magnetic circuit Preferably, the magnetic attraction is generated radially outward.

  By doing this, the magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit and the magnetic attraction force in the direction orthogonal to the axial direction generated by the second magnetic circuit are opposite to each other. It occurs in Therefore, since the magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit and the magnetic attraction force in the direction orthogonal to the axial direction generated by the second magnetic circuit cancel each other, the movable core Since the magnetic attraction force in the direction orthogonal to the axial direction does not work, the sliding resistance of the movable core can be further reduced. Thereby, in the gas fuel supply device, it is possible to further improve the durability, the response, and the hysteresis.

Alternatively, in the gas fuel supply device described above,
The magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit and the magnetic attraction force in the direction orthogonal to the axial direction generated by the second magnetic circuit when the coil is energized , Both may be generated radially inward.

  By doing this, the magnetic attraction force in the direction orthogonal to the axial direction generated by each of the first magnetic circuit and the second magnetic circuit is generated toward the axial center, thereby further reducing the sliding resistance of the movable core can do. As a result, it is possible to further improve the durability, the response, and the hysteresis in the gas fuel supply device.

In the above-described gas fuel supply device,
It is preferable that the first fixed corner and the second fixed corner have an acute-angled shape.

  With such a configuration, the magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit and the second magnetic circuit is reduced, and the axial direction generated by the first magnetic circuit and the second magnetic circuit Can increase the magnetic attraction force.

Furthermore, in the aforementioned gas fuel supply system,
It is preferable that the first fixed corner and the second fixed corner have an acute-angled shape.

  With such a configuration, the magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit and the second magnetic circuit can be further reduced, and the shaft generated by the first magnetic circuit and the second magnetic circuit The magnetic attraction force in the direction can be made larger.

  According to the present disclosure, it is possible to provide a gas fuel supply device capable of reducing the sliding resistance of the movable core while improving the magnetic attraction force in the axial direction.

It is a sectional view of a fuel injection device in a 1st embodiment. It is an enlarged view of each corner part vicinity in the fixed core in 1st Embodiment, and a movable core. It is a figure for demonstrating the 1st magnetic circuit and 2nd magnetic circuit in 1st Embodiment. It is sectional drawing of the fuel-injection apparatus in 2nd Embodiment. It is an enlarged view of each corner part vicinity in the fixed core in 2nd Embodiment, and a movable core. It is a figure for demonstrating the 1st magnetic circuit and 2nd magnetic circuit in 2nd Embodiment.

First Embodiment
In the present embodiment, the gas fuel supply device of the present disclosure is applied to a fuel injection device (linear solenoid). This fuel injection device is, for example, a device for supplying gas fuel (for example, hydrogen) to a fuel cell (not shown) in a fuel cell vehicle. Therefore, first, the first embodiment will be described with reference to FIGS. 1 to 3.

<Configuration of Fuel Injection Device>
As shown in FIG. 1, the fuel injection device 1 according to the first embodiment includes a linear solenoid unit 10, a valve body 12, a valve seat 14, a housing 16 and the like.

  The linear solenoid unit 10 includes a coil 50, a fixed core 52, a movable core 54, a compression spring 56, a yoke 60 and the like. The coil 50 is formed by winding a conductive wire around a hollow cylindrical coil bobbin 51. The fixed core 52 and the movable core 54 are disposed in the hollow portion of the coil bobbin 51.

  The fixed core 52 is disposed at one end of the coil bobbin 51. The fixed core 52 is formed in a substantially cylindrical shape (including a true cylindrical shape and an elliptical cylindrical shape), and includes a large diameter recess 70, a small diameter recess 72, and an annular recess 74. The large diameter recess 70 is a portion where the compression spring 56 is disposed, and the small diameter recess 72 is a portion where the movable core 54 slides. The annular recess 74 is formed on the end face facing the movable core 54, and includes a first fixed corner 75 and a second fixed corner 76, as shown in FIG. The first fixed corner 75 is located inside the annular recess 74, and the second fixed corner 76 is located outside the annular recess 74. That is, the second fixed corner portion 76 is located radially outward of the first fixed corner portion 75. Further, the outer side surface of the annular recess 74 is tapered, and the first fixed corner 75 and the second fixed corner 76 have an acute-angled shape. Such fixed core 52 is formed of soft magnetic material (for example, electromagnetic stainless steel). Further, in the annular recess 74, a stopper 78 is provided which restricts the maximum stroke amount of the movable core 54 when the movable core 54 abuts. The stopper 78 is a nonmagnetic material.

  Returning to FIG. 1, the movable core 54 is formed in a substantially cylindrical shape (including a true cylindrical shape, an elliptical cylindrical shape, and the like), and includes a main body 80, a shaft 84, and a valve body 86. The movable core 54 is formed of a soft magnetic material (for example, electromagnetic stainless steel). An annular convex portion 81 is formed on the end face of the main body 80 opposite to the fixed core 52 so as to correspond to the annular concave portion 74. As shown in FIG. 2, the annular convex portion 81 includes a first movable corner 82 and a second movable corner 83. The first movable corner portion 82 is positioned inside the annular convex portion 81, and the second movable corner portion 83 is positioned outside the annular convex portion 81. That is, the second movable corner 83 is located radially outward of the first movable corner 82. Further, a V (or U) groove is formed on the end face of the annular convex portion 81, and the first movable corner 82 and the second movable corner 83 have an acute angle. In the movable core 54, the first movable corner 82 is closest to the first fixed corner 75 when the valve body 12 is in contact with the valve seat 14 (the state shown in FIG. 1). The movable corner 83 is closest to the second fixed corner 76.

  Further, as shown in FIG. 1, in the movable core 54, a part of the main body 80 and the valve body 86 are disposed in the housing 16, and the shaft 84 is disposed in the fixed core 52. The main body 80 and the shaft 84 are located in the hollow portion of the coil bobbin 51. The movable core 54 is slidably supported at its one end by the shaft portion 84 in the small diameter recess 72 and at the other end by the valve body portion 86 slidably supported by the housing 16. Further, the valve body 12 is integrally formed at an end of the valve body portion 86, and the valve body 12 moves along with the movement of the movable core 54.

  The compression spring 56 is disposed in the large diameter recess 70 and between the fixed core 52 and the movable core 54. The compression spring 56 is in a compressed state, and biases the valve body 12 (movable core 54) toward the valve seat 14.

  The yoke 60 is disposed to surround the coil 50. A lid member 62 is disposed at the opening of the yoke 60. The yoke 60 and the cover member 62 are formed of a soft magnetic material (for example, electromagnetic stainless steel), and constitute a cover of the linear solenoid unit 10.

  The valve body 12 is integrally formed at the end of the valve body portion 86 of the movable core 54. The valve body 12 is disposed upstream of the valve seat 14 in the gas fuel flow direction. The valve body 12 is provided with a substantially disc-shaped seal member 13 at its end face. The seal member 13 is a portion that contacts / separates from the valve seat 14 (the seat portion 15). The seal member 13 is formed of an elastic body such as rubber or resin.

  The valve seat 14 is fixed to the housing 16 and includes a seat portion 15 which is tapered on the outside. The sealing member 13 of the valve body 12 elastically abuts on the seat portion 15 while being in contact with the sheet portion 15 to ensure sealing performance at the time when the gas fuel supply is stopped (when the valve is closed). The valve seat 14 is disposed downstream of the valve body 12 in the flow direction of the gas fuel. A discharge hole 22 is formed at a central portion of the valve seat 14. The discharge hole 22 is a hole which penetrates the valve seat 14 in the axial direction, and is a flow path of gas fuel. The discharge hole 22 is connected to a supply destination (for example, a fuel cell) via a fuel pipe.

  The housing 16 is formed in a substantially cylindrical shape, and accommodates the valve body 12 (a part of the movable core 54), the valve seat 14 and the like. The housing 16 is formed of a soft magnetic material (eg, electromagnetic stainless steel). Further, a fuel flow passage 18 through which gas fuel flows is formed in the housing 16. Further, the housing 16 is provided with an inflow hole (not shown) communicating with the fuel flow passage 18. The inflow port is connected to a fuel container (for example, a hydrogen cylinder) via a fuel pipe.

  A part of the housing 16 (the part accommodating the main body 80 of the movable core 54) is disposed at the other end (opposite to the fixed core 52) of the hollow part of the coil bobbin 51. Further, an annular member 64 which is a nonmagnetic material is disposed between the end of the housing 16 and the end of the fixed core 52.

<Operation of Fuel Injection Device>
Next, the operation (operation) of the fuel injection device 1 will be described. First, when the coil 50 is not energized, that is, when the valve is closed, as shown in FIG. 1, the seal member 13 of the valve body 12 receives the seat portion 15 of the valve seat 14 by the biasing force of the compression spring 56. In contact with Therefore, the discharge hole 22 of the valve seat 14 is shut off from the fuel flow passage 18. Therefore, the gas fuel is not discharged from the discharge hole 22 to the outside of the fuel injection device 1.

  On the other hand, when the coil 50 is energized, that is, when the valve is open, magnetic flux flows around the coil 50 through the yoke 60, the housing 16, the movable core 54, the fixed core 52, and the lid member 62 Two magnetic circuits returning to 60 are formed. The two magnetic circuits differ in the flow path of the magnetic flux between the movable core 54 and the fixed core 52. That is, as shown in FIG. 3, the first magnetic circuit M1 in which the magnetic flux flows between the first movable corner 82 and the first fixed corner 75, the second movable corner 83, and the second fixed corner 76 And a second magnetic circuit M2 in which magnetic flux flows.

  Therefore, in each of the first magnetic circuit M1 and the second magnetic circuit M2, a magnetic attraction force is generated in which the fixed core 52 attracts the movable core 54. Therefore, in the linear solenoid unit 10, the magnetic attraction force for attracting the movable core 54 is increased without increasing the size of the coil 50. As a result, the valve opening property of the fuel injection device 1 can be improved without increasing in size.

  At the start of energization, that is, at the start of valve opening, the first movable corner 82 and the first fixed corner 75 are closest to each other, and the second movable corner 83 and the second fixed corner 76 are the largest. It is close. As a result, it is possible to maximize both of the magnetic attraction forces generated by the first magnetic circuit M1 and the second magnetic circuit M2 and that attract the movable core 54 in the axial direction. Therefore, in the linear solenoid unit 10, the axial attraction force for attracting the movable core 54 in the axial direction (the fixed core 52 side) can be increased. It can be improved.

  Thereby, since the movable core 54 can be reliably moved to the fixed core 52 side, the valve body 12 moves to the fixed core 52 side. Therefore, the seal member 13 of the valve body 12 is separated from the seat portion 15 of the valve seat 14. Thus, the discharge hole 22 of the valve seat 14 communicates with the fuel flow passage 18.

  Specifically, the discharge hole 22 communicates with the fuel flow path 18 through a gap between the seal member 13 of the valve body 12 and the seat portion 15 of the valve seat 14. Therefore, the gaseous fuel flowing in the fuel flow passage 18 flows into the discharge hole 22 through the gap between the seal member 13 and the seat portion 15. As a result, the gas fuel is discharged from the discharge hole 22 to the outside of the fuel injection device 1. At this time, in accordance with (proportional to) the amount of current flowing through the coil 50, the amount of movement of the movable core 54 (valve element 12) changes. Therefore, by controlling the amount of current supplied to the coil 50, it is possible to adjust the opening degree of the fuel injection device 1 and control the amount of gas fuel supplied.

  Here, since the first magnetic circuit M1 and the second magnetic circuit M2 are formed, and the magnetic attraction force for attracting the movable core 54 by the fixed core 52 is increased, the magnetic attraction force in the axial direction is increased, The magnetic attraction force in the direction orthogonal to the axial direction also increases. When the magnetic attraction force in the direction orthogonal to the axial direction increases, the sliding resistance of the movable core 54 may increase. When the sliding resistance of the movable core 54 is increased, the durability of the fuel injection device 1 is lowered, the response is lowered, the hysteresis is increased, and the performance is lowered.

  However, in the fuel injection device 1 of the present embodiment, the magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit M1 is generated radially inward and is orthogonal to the axial direction generated by the second magnetic circuit M2. The magnetic attraction force in the direction of movement is generated radially outward. Thus, due to the interaction between the magnetic attraction force generated by the first magnetic circuit M1 and the magnetic attraction force generated by the second magnetic circuit M2, the radially outward magnetic attraction perpendicular to the axial direction acting on the movable core 54 Force is reduced. That is, the magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit M1 and the magnetic attraction force in the direction orthogonal to the axial direction generated by the second magnetic circuit M2 occur in opposite directions. In order to mutually cancel (cancel) each other, the magnetic attraction force in the direction orthogonal to the axial direction hardly acts on the movable core 54. As a result, the sliding resistance of the movable core 54 can be reduced, so that it is possible to improve the durability, improve the response, and reduce the hysteresis in the fuel injection device 1.

  Further, in the fuel injection device 1 of the present embodiment, the first fixed corner 75 and the second fixed corner 76 have an acute angle shape, and the first movable corner 82 and the second movable corner 83 have an acute angle. I am Therefore, while reducing the magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit M1 and the second magnetic circuit M2, the axial magnetic attraction generated by the first magnetic circuit M1 and the second magnetic circuit M2 The power can be increased. As a result, the sliding resistance of the movable core 54 can be further reduced, so that it is possible to further improve the durability, the response, and the hysteresis in the fuel injection device 1.

  As described above in detail, according to the fuel injection device 1 according to the present embodiment, when the coil 50 is energized, the first movable corner 82 of the movable core 54 and the fixed core in the linear solenoid unit 10 are fixed. A magnetic flux flows between the first magnetic circuit M1 through which the magnetic flux flows between the first fixed corner portion 75 and the second fixed corner portion 76 of the movable core 54 and the second fixed corner portion 76 of the fixed core 52. Two magnetic circuits with the second magnetic circuit M2 are formed. Then, the magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit M1 is generated radially inward, and the magnetic attraction force in the direction orthogonal to the axial direction generated by the second magnetic circuit M2 is radially outward It occurs. As a result, the magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit M1 and the magnetic attraction force in the direction orthogonal to the axial direction generated by the second magnetic circuit M2 cancel each other, so that the movable Since the magnetic attraction force in the direction orthogonal to the axial direction does not act on the core 54, the sliding resistance of the movable core 54 can be reduced. Therefore, it is possible to improve the durability, improve the response, and reduce the hysteresis while improving the valve opening property of the fuel injection device 1.

Second Embodiment
Next, the second embodiment will be described with reference to FIG. 4 to FIG. I will focus on it.

  In the fuel injection device 101 of the present embodiment, as shown in FIG. 4, the shapes of the fixed core 152 and the movable core 154 are different from those of the first embodiment. Specifically, the stationary core 152 comprises an annular step 174 instead of the annular recess 74. Further, as shown in FIG. 5, the annular stepped portion 174 is provided with a first fixed corner portion 175 and a second fixed corner portion 176. The first fixed corner portion 175 is located at the first stage (lower side in FIG. 5) of the annular stepped portion 174, and the second fixed corner portion 176 is the second stage of the annular stepped portion 174 (upper side in FIG. 5). It is located in That is, the second fixed corner portion 176 is located radially outward of the first fixed corner portion 175. A stopper 178 is provided on the fixed core 152 that regulates the maximum stroke amount of the movable core 154.

  The movable core 154 includes an annular stepped portion 181 in the main body portion 180 instead of the annular convex portion 81 (see FIG. 4). A first movable corner 182 and a second movable corner 183 are provided in the annular step 181. The first movable corner portion 182 is located at the first stage (lower side in FIG. 5) of the annular stepped portion 181, and the second movable corner portion 183 is the second stage of the annular stepped portion 181 (upper stage in FIG. 5) It is located in That is, the second movable corner 183 is located radially outward of the first movable corner 182.

  In the fuel injection device 101 as described above, when the coil 50 is energized, that is, when the valve is opened, magnetic flux flows around the coil 50 in the yoke 60, the housing 16, the movable core 154, the fixed core 152, and the lid. Two magnetic circuits are formed which flow through the member 62 and return to the yoke 60. The two magnetic circuits differ in the flow path of the magnetic flux between the movable core 154 and the fixed core 152, and the first magnetic flux flows between the first movable corner 182 and the first fixed corner 175. A circuit M11 and a second magnetic circuit M12 in which magnetic flux flows are formed between the second movable corner 183 and the second fixed corner 176. Therefore, in the linear solenoid portion 110, the magnetic attraction force in the axial direction for attracting the movable core 154 is increased without increasing the size of the coil 50. As a result, the valve opening property of the fuel injection device 101 can be improved without increasing in size.

  Thus, as the magnetic attraction force in the axial direction in which the fixed core 152 attracts the movable core 154 increases, the magnetic attraction force acting in the direction orthogonal to the axial direction also increases. However, in the fuel injection device 101 of the present embodiment, the magnetic attraction force generated by the first magnetic circuit M11 interacts with the magnetic attraction force generated by the second magnetic circuit M12 in the axial direction acting on the movable core 154. The orthogonal radial outward magnetic attraction is significantly reduced. That is, since the magnetic attraction forces in the direction orthogonal to the axial direction generated by the first magnetic circuit M11 and the second magnetic circuit M12 both occur radially inward (axial center), the magnetic attraction force outward in the radial direction disappears . Therefore, the sliding resistance of the movable core 154 can be reduced, and therefore, the fuel injection device 101 can be improved in durability, responsiveness, and hysteresis.

  The embodiment described above is merely an example, and does not limit the present disclosure in any way, and it goes without saying that various improvements and modifications can be made without departing from the scope of the invention. For example, in the first embodiment described above, the annular concave portion 74 is formed in the stationary core 52 to provide the first stationary corner portion 75 and the second stationary corner portion 76, and the annular convex portion 81 is formed in the movable core 54. A first movable corner 82 and a second movable corner 83 are provided. However, by reversing this, an annular convex portion is formed on the fixed core 52 to provide a first fixed corner portion and a second fixed corner portion, and an annular recess is formed on the movable core 54 to form a first movable corner portion and a first movable corner portion. Two movable corners can also be provided.

  In the first embodiment described above, the V (or U) groove is formed on the end face of the annular convex portion 81 to make the first movable corner portion 82 and the second movable corner portion 83 an acute-angled shape. V (or U) grooves may be formed on both side surfaces of the portion 81 to make the first movable corner 82 and the second movable corner 83 acute-angled.

  Furthermore, in the second embodiment described above, the first fixed corner portion 175 and the second fixed corner portion 176, the first movable corner portion 182 and the second movable corner portion 183 do not have an acute-angled shape, but of course The corners may be acute-angled as in the first embodiment. Also, conversely, in the first embodiment, the first fixed corner 75 and the second fixed corner 76, the first movable corner 82 and the second movable corner 83 have an acute-angled shape, but these corners May not have an acute-angled shape as in the second embodiment.

DESCRIPTION OF SYMBOLS 1 fuel injection device 10 linear solenoid part 12 valve body 13 seal member 14 valve seat 15 seat part 16 housing 50 coil 52 fixed core 54 movable core 56 compression spring 60 yoke 70 large diameter recessed part 72 small diameter recessed part 74 annular recessed part 75 first fixed angle Part 76 Second fixed corner part 78 Stopper 80 Body part 81 Annular convex part 82 First movable corner part 83 Second movable corner part M1 First magnetic circuit M2 Second magnetic circuit

Claims (5)

Linear having a coil, a fixed core, a movable core attracted to the fixed core by energization of the coil, a spring urging the movable core away from the fixed core, and a yoke covering the coil A gas fuel supply apparatus comprising a solenoid unit, wherein the linear solenoid unit adjusts the flow rate of gas fuel by changing a distance between a valve body moving with the movable core and a valve seat fixed to the housing.
The movable core includes a first movable corner and a second movable corner located radially outward of the first movable corner.
The fixed core includes a first fixed corner corresponding to the first movable corner and a second fixed corner corresponding to the second movable corner.
When the coil is energized,
A first magnetic circuit in which a magnetic flux flows is formed between the first movable corner portion and the first fixed corner portion,
A second magnetic circuit in which magnetic flux flows is formed between the second movable corner and the second fixed corner.
The interaction between the magnetic attraction generated by the first magnetic circuit and the magnetic attraction generated by the second magnetic circuit reduces the radially outward magnetic attraction that is orthogonal to the axial direction acting on the movable core. A gas fuel supply device characterized in that In the gas fuel supply device according to claim 1,
When power is supplied to the coil, a magnetic attraction force in a direction perpendicular to the axial direction generated by the first magnetic circuit is generated radially inward, and a direction perpendicular to the axial direction generated by the second magnetic circuit A gas fuel supply device characterized in that a magnetic attraction force is generated radially outward. In the gas fuel supply device according to claim 1,
The magnetic attraction force in the direction orthogonal to the axial direction generated by the first magnetic circuit and the magnetic attraction force in the direction orthogonal to the axial direction generated by the second magnetic circuit when the coil is energized A gas fuel supply device characterized in that both occur radially inward. The gas fuel supply device according to any one of claims 1 to 3
The gas fuel supply device according to claim 1, wherein the first fixed corner portion and the second fixed corner portion have an acute angle shape. The gas fuel supply system according to any one of claims 1 to 4, wherein
The gas fuel supply device according to claim 1, wherein the first movable corner portion and the second movable corner portion have an acute-angled shape.

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