JP2019203385A - Valve gear - Google Patents

Abstract

To provide valve gear in which the size thereof can be reduced while a fluid-flowable range is expanded.SOLUTION: A fuel injection valve 1 comprises: a housing 20 having an inside nozzle hole 241 and outside nozzle holes 242, 243; an inside valve member 25 which can open and close the inside nozzle hole 241: an outside valve member 35 which can open and close the outside nozzle holes 242, 243; a fixed core 40; a coil 45; an inside movable core 55; an outside movable core 65; and a magnetic throttle part 41. The inside movable core 55 is provided integrally with the inside valve member 25 in a movable manner and generates magnetic attraction force between the fixed core 40 and the inside movable core 55 when the coil 45 forms a magnetic field. The outside movable core 65 is provided integrally with the outside valve member 35 in a movable manner, and generates magnetic attraction force between the fixed core 40 and the outside movable core 65 when the coil 45 forms the magnetic field. The magnetic throttle part 41 is provided between the fixed core 40 and the inside movable core 55. The fuel injection valve 1 can open the outside nozzle holes 242, 243 after opening the inside nozzle hole 241.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a valve device.

  2. Description of the Related Art Conventionally, there is known a fuel injection valve that can control the drive of a plurality of valve members and expand the range of fuel injection amount that can be injected by dividing the fuel in each of a plurality of nozzle holes. For example, Patent Document 1 discloses an inner valve member that can open and close an inner nozzle hole, and an outer valve that is provided outside the central nozzle hole that is provided on the radially outer side of the inner valve member. A fuel injection valve comprising a valve member is described.

Japanese Patent Laid-Open No. 2007-1000064

  However, the fuel injection valve described in Patent Literature 1 includes a first drive unit that can drive the inner valve member and a second drive unit that can drive the outer valve member. This complicates the configuration of the fuel injection valve and increases the physique.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a valve device capable of reducing the physique while expanding the flow range in which fluid can flow.

  The present invention is a valve device comprising a housing (20), a first valve member (25, 26, 28), a second valve member (35, 36, 38), a fixed core (40), a coil (45), A control unit (50, 60, 70), a first movable core (55, 56), a second movable core (65, 66), and a magnetic aperture unit (41, 81) are provided.

  The first valve member is provided so as to be movable relative to a housing having a plurality of through holes (241, 242, 243) through which fluid can flow. The first valve member can open and close at least one through hole (241) of the plurality of through holes.

  The second valve member is provided to be movable relative to the housing. The second valve member can open and close the second through holes (242, 243) excluding at least one of the plurality of through holes.

  The fixed core is provided so as not to move relative to the housing.

  The coil forms a magnetic field when energized.

  The control unit controls energization to the coil.

  The first movable core is provided so as to be movable integrally with the first valve member. When the coil forms a magnetic field, a magnetic attractive force is generated between the first movable core and the fixed core.

  The second movable core is provided so as to be movable integrally with the second valve member. When the coil forms a magnetic field, a magnetic attractive force is generated between the second movable core and the fixed core.

  The magnetic diaphragm portion is provided between the fixed core and the first movable core.

  The valve device of the present invention can open the second through hole after opening the first through hole.

  In the valve device of the present invention, when a magnetic field is formed by energizing the coil, the first valve member is moved by the magnetic attraction force between the first movable core and the fixed core via the magnetic restrictor, and the first passage is made. A hole opens. Thereafter, when the amount of current supplied to the coil is increased, the magnetic flux density in the magnetic aperture portion provided between the fixed core and the first movable core is saturated. Thereby, since the magnetic attraction force between the second movable core and the fixed core is increased, the second valve member is moved and the second through hole is opened.

  As described above, in the valve device of the present invention, the opening and closing of the first through hole and the opening and closing of the second through hole can be controlled by controlling the energization to the coil. The driving source is not required. Thereby, the valve apparatus of this invention can make a physique small by simple structure, expanding the flow volume range which can distribute | circulate the fluid by having a some injection hole.

  In addition, the control unit included in the valve device of the present invention controls energization to the coil so as to intermittently open the second hole in the state where the first hole is continuously opened, After opening the second through hole, the energization to the coil is controlled so that the first through hole is closed while the second through hole is opened. Thereby, the valve apparatus of this invention can inject the quantity of the fluid of a multistep within the range of the quantity which can inject a fluid.

It is sectional drawing of the valve apparatus by 1st embodiment. 1 is a schematic diagram of an engine system to which a valve device according to a first embodiment is applied. It is sectional drawing explaining the effect | action of the valve apparatus by 1st embodiment, Comprising: It is sectional drawing of a state different from FIG. It is sectional drawing explaining the effect | action of the valve apparatus by 1st embodiment, Comprising: It is sectional drawing of a state different from FIG. It is a characteristic view explaining the relationship between the pulse width of the electric current in the valve apparatus by 1st embodiment, and the injection amount. It is a characteristic view which shows the time change of the characteristic of the valve apparatus by 1st embodiment. It is a characteristic view which shows the time change of the characteristic of the valve apparatus by 1st embodiment, Comprising: It is a characteristic view of a state different from FIG. It is sectional drawing of the valve apparatus by 2nd embodiment. It is sectional drawing of the valve apparatus by 3rd embodiment. FIG. 10 is a sectional view taken along line XX in FIG. 9. It is the XI-XI sectional view taken on the line of FIG. It is sectional drawing of the valve apparatus by 3rd embodiment, Comprising: It is sectional drawing of a state different from FIG. It is sectional drawing of the valve apparatus by 4th embodiment. It is sectional drawing of the valve apparatus by 4th embodiment, Comprising: It is sectional drawing of a state different from FIG. It is sectional drawing of the valve apparatus by 5th embodiment. It is sectional drawing of the valve apparatus by 5th embodiment, Comprising: It is sectional drawing of a state different from FIG. It is sectional drawing of the valve apparatus by 6th embodiment. It is sectional drawing of the valve apparatus by 6th embodiment, Comprising: It is sectional drawing of a state different from FIG. It is sectional drawing of the valve apparatus by 7th embodiment. It is a characteristic view which shows the time change of the characteristic of the valve apparatus by 7th embodiment. It is a characteristic view which shows the time change of the characteristic of the valve apparatus by 7th embodiment, Comprising: It is a characteristic view of a state different from FIG. It is a characteristic view which shows the time change of the characteristic of the valve apparatus by 7th embodiment, Comprising: It is a characteristic view of the state different from FIG. It is sectional drawing of the valve apparatus by 8th embodiment. It is a characteristic view which shows the time change of the characteristic of the valve apparatus by 8th embodiment. It is sectional drawing of the valve apparatus by 8th embodiment, Comprising: It is a characteristic view of a state different from FIG. It is sectional drawing of the valve apparatus by 8th embodiment, Comprising: It is a characteristic view of a state different from FIG. It is sectional drawing of the valve apparatus by 8th embodiment, Comprising: It is a characteristic view of a state different from FIG. It is a characteristic view which shows the time change of the characteristic of the valve apparatus by 8th embodiment, Comprising: It is a characteristic view in control different from the control shown in FIG. It is a characteristic view which shows the time change of the characteristic of the valve apparatus by 8th embodiment, Comprising: It is a characteristic view in control different from the control shown in FIG. It is a schematic diagram of the fuel cell system to which the valve device according to the ninth embodiment is applied.

  Hereinafter, a plurality of embodiments will be described with reference to the drawings. In a plurality of embodiments, the same reference numerals are given to substantially the same parts as those in the other embodiments, and the description thereof is omitted.

(First embodiment)
A fuel injection valve 1 as a “valve device” according to a first embodiment will be described with reference to FIGS. The fuel injection valve 1 is applied to the engine system 10 shown in FIG.

  First, the configuration of the engine system 10 will be described with reference to FIG. The engine system 10 is a system including, for example, a four-cycle engine 11, and generates rotational torque by burning gas fuel as “fluid” injected by the fuel injection valve 1 in the combustion chamber 110. As shown in FIG. 2, the engine system 10 includes an engine 11, an intake system 12, a fuel injection valve 1, an exhaust system 13, a spark plug 14, and the like.

  The intake system 12 includes an intake manifold 121, a throttle valve 122, and an intake valve 123. The intake manifold 121 is provided with a throttle valve 122 that can adjust the amount of air supplied to the combustion chamber 110 of the engine 11. The fuel injection valve 1 is provided in the intake manifold 121. The gas fuel injected by the fuel injection valve 1 is introduced into the combustion chamber 110 together with the air flowing through the intake manifold 121. An intake port 124 that connects the intake manifold 121 and the combustion chamber 110 is provided at a location where the intake manifold 121 and the engine 11 are connected. The intake port 124 is opened and closed by an intake valve 123.

  The exhaust system 13 includes an exhaust manifold 131 and an exhaust valve 132. An exhaust port 133 that connects the exhaust manifold 131 and the combustion chamber 110 is provided at a location where the exhaust manifold 131 and the engine 11 are connected. The exhaust port 133 is opened and closed by an exhaust valve 132.

  The spark plug 14 can generate a spark capable of igniting a mixture of gas fuel and air introduced into the combustion chamber 110. The spark plug 14 is electrically connected to the ignition control unit 141. The ignition control unit 141 controls the ignition timing in the spark plug 14 based on information about the device on which the engine 11 is mounted, such as the rotation angle of the crankshaft 111 of the engine 11.

  Next, a detailed configuration of the fuel injection valve 1 will be described with reference to FIG. The fuel injection valve 1 includes a housing 20, an inner valve member 25 as a “first valve member”, an outer valve member 35 as a “second valve member”, a fixed core 40, a magnetic throttle portion 41, and a “nonmagnetic portion”. Impact mitigating member 42, coil 45, control unit 50, inner movable core 55 as “first movable core”, outer movable core 65 as “second movable core”, first spring 71, and second spring 72. Is provided. In FIG. 1, the direction in which the inner valve member 25 and the outer valve member 35 move so as to contact the injection portion 24 as the “through hole forming portion” of the housing 20 is referred to as a “valve closing direction”. A direction in which the outer valve member 35 moves away from the injection unit 24 of the housing 20 is referred to as a “valve opening direction”.

  The housing 20 includes a first cylinder part 21, a second cylinder part 22, a third cylinder part 23, and an injection part 24. The first cylinder part 21 is a cylindrical part having openings at both ends. The 1st cylinder part 21 is formed from the magnetic material. The second cylinder part 22 is provided at an edge part that forms one opening of the first cylinder part 21. The second cylinder part 22 is a cylindrical part having openings at both ends. The 2nd cylinder part 22 is formed from the nonmagnetic material. The third cylinder part 23 is provided on the opposite side of the second cylinder part 22 from the first cylinder part 21. The third cylinder portion 23 is a cylindrical portion having openings at both ends. The third cylinder portion 23 is made of a magnetic material. The first cylinder part 21, the second cylinder part 22, and the third cylinder part 23 are provided so that the central axes are coaxial.

  The injection part 24 is a substantially circular part provided on the opposite side of the first cylinder part 21 from the second cylinder part 22. The injection unit 24 has a plurality of injection holes through which gas fuel can flow. An injection hole located on the central axis CA1 of the fuel injection valve 1 among the plurality of injection holes is referred to as an inner injection hole 241 as a “first through hole”. Out of the plurality of nozzle holes, the nozzle holes formed in the direction away from the central axis CA1 when viewed from the inner nozzle hole 241 are referred to as outer nozzle holes 242 and 243 as “second through holes”. In the first embodiment, the inner injection hole 241 is formed so that the cross-sectional area is smaller than the total cross-sectional area of the outer injection holes 242 and 243.

  The inner valve member 25 is a member formed in a substantially rod shape, and includes a shaft portion 251 and a seal portion 252. The inner valve member 25 is provided to be movable relative to the housing 20.

  The shaft portion 251 is a rod-shaped part. The shaft portion 251 has a passage 250 that opens to an end surface 253 on the valve opening direction side and a radially outer side surface 254 in the vicinity of the seal portion 252.

  The seal portion 252 is provided on the valve closing direction side of the shaft portion 251. The seal part 252 is formed integrally with the shaft part 251. The seal portion 252 is formed from an elastic material, for example, rubber. The seal part 252 is formed so as to be able to close the opening of the inner injection hole 241 on the first cylinder part 21 side when contacting the end surface 244 of the injection part 24 on the first cylinder part 21 side. Thereby, the inner side valve member 25 can open and close the inner side injection hole 241.

  The outer valve member 35 is a member formed in a substantially cylindrical shape, and includes a cylindrical portion 351 and a seal portion 352. The outer valve member 35 is provided so as to be movable relative to the housing 20.

  The cylindrical part 351 is a cylindrical part provided in the radially outward direction of the shaft part 251. The cylindrical portion 351 has a passage 350 that communicates the radial inner side and the radial outer side of the cylindrical portion 351. The passage 350 is formed at a plurality of locations of the cylindrical portion 351 so as to penetrate the cylindrical portion 351 in the radial direction.

  The seal part 352 is provided on the valve closing direction side of the cylinder part 351. The seal part 352 is formed integrally with the cylinder part 351. The seal portion 352 is formed in an annular shape from an elastic material, for example, rubber. The seal portion 352 is formed so as to be able to close the opening on the first tube portion 21 side of the outer injection holes 242 and 243 when coming into contact with the end surface 244 of the injection portion 24. Thereby, the outer valve member 35 can open and close the outer nozzle holes 242 and 243.

  The fixed core 40 is provided on the radially inner side of the third cylindrical portion 23 so as not to move relative to the housing 20. In the first embodiment, the fixed core 40 is formed in a cylindrical shape, and is supported by a cylindrical fixing member 231 in which an end portion on the valve opening direction side is fixed on the radially inner side of the third cylindrical portion 23. ing.

  The magnetic restrictor 41 is provided on the valve closing direction side of the fixed core 40 and at a position facing an inner movable core 55 described later. The magnetic aperture 41 is formed in an annular shape. In the first embodiment, the magnetic aperture portion 41 is formed integrally with the fixed core 40. The magnetic aperture 41 is formed so that the inner diameter is larger than the inner diameter of the fixed core 40. In the cross-sectional view shown in FIG. 1, the boundary between the fixed core 40 and the magnetic throttle portion 41 is indicated by a two-dot chain line VL4. In FIG. 1, the two-dot chain line VL4 overlaps with a virtual line when a cross-sectional line representing the radially outer side surface 551 of the inner movable core 55 is extended in the valve opening direction.

  The impact relaxation member 42 is provided on the inner side in the radial direction of the magnetic diaphragm portion 41. The impact relaxation member 42 is formed of a nonmagnetic material having a relatively high hardness. The end surface 421 on the valve closing direction side of the impact relaxation member 42 is located closer to the injection unit 24 than the end surface 411 as the “end surface facing the first movable core of the magnetic throttle unit” on the valve closing direction side of the magnetic throttle unit 41. To do. The end surface 421 of the impact relaxation member 42 can contact the inner movable core 55.

  The coil 45 is provided outside the housing 20 in the radial direction. Specifically, the coil 45 is fixed so as not to move relative to the housing 20 by a coil holding member 451 formed of a magnetic material. The coil 45 is electrically connected to the control unit 50. The coil 45 forms a magnetic field when energized.

  The control unit 50 is configured by a microcomputer including a CPU, a ROM, a RAM, an input / output port, and the like. The controller 50 controls the magnitude of the current supplied to the coil 45 based on information input from the outside.

  The inner movable core 55 is provided on the valve opening direction side of the inner valve member 25 so as to be movable integrally with the inner valve member 25. The inner movable core 55 is formed in a substantially disc shape from a magnetic material. The inner movable core 55 is formed so that the outer diameter is larger than the outer diameter of the shaft portion 251. When the coil 45 forms a magnetic field, the inner movable core 55 generates a magnetic attractive force with the fixed core 40. The inner movable core 55 has a passage 550 that communicates the valve opening direction side and the valve closing direction side of the inner movable core 55. The passage 550 communicates with the passage 250 of the shaft portion 251.

  The outer movable core 65 is provided on the valve opening direction side of the outer valve member 35 so as to be movable together with the outer valve member 35. The outer movable core 65 is formed in a substantially annular shape from a magnetic material. The outer movable core 65 is formed so that the outer diameter is larger than the outer diameter of the cylindrical portion 351. The outer movable core 65 is formed so that the inner diameter is the same as or slightly larger than the outer diameter of the inner movable core 55. The side surface 651 on the radially inner side of the outer movable core 65 and the side surface 551 of the inner movable core 55 slidable with the side surface 651 are subjected to wear resistance processing such as soft nitriding. When the coil 45 forms a magnetic field, the outer movable core 65 generates a magnetic attractive force with the fixed core 40.

  In the fuel injection valve 1, the area of the end surface 411 of the magnetic throttle portion 41 that faces the inner movable core 55 is “opposing the second movable core of the fixed core on the valve closing direction side of the fixed core 40 that faces the outer movable core 65. It is smaller than the area of the end face 401 as “end face to be performed”. In the fuel injection valve 1, as shown in FIG. 1, when the inner valve member 25 and the outer valve member 35 are in contact with the end surface 244 of the injection unit 24, the inner movable core 55 and the end surface 411 of the magnetic throttle unit 41 are disposed. Is shorter than the distance L12 between the outer movable core 65 and the end surface 401 of the fixed core 40.

  The first spring 71 is provided in the radially inward direction of the fixed core 40 and in the radially inward direction of the fixing member 231. One end of the first spring 71 is in contact with the end surface of the inner movable core 55 on the valve opening direction side. The other end of the first spring 71 is in contact with an adjusting pipe 43 provided on the radially inner side of the fixing member 231. The first spring 71 urges the inner valve member 25 together with the inner movable core 55 so that the seal portion 252 contacts the end face 244 of the injection portion 24.

  The second spring 72 is provided in the radially outward direction of the fixed core 40. One end of the second spring 72 is in contact with the valve opening direction side of the outer movable core 65. The other end of the second spring 72 is in contact with the end surface of the fixing member 231 on the valve closing direction side. The second spring 72 urges the outer valve member 35 together with the outer movable core 65 so that the seal portion 352 contacts the end surface 244 of the injection portion 24.

Next, the operation of the fuel injection valve 1 will be described with reference to FIGS.
The fuel injection valve 1 is in the state shown in FIG. 1 when no current flows through the coil 45. Specifically, since the seal portion 252 of the inner valve member 25 and the seal portion 352 of the outer valve member 35 are in contact with the end surface 244 of the injection portion 24, the inner injection hole 241 and the outer injection holes 242 and 243 are closed. It has been. The gas fuel flowing into the housing 20 through the inside of the adjusting pipe 43 passes through the passage 550 of the inner movable core 55, the passage 250 of the shaft portion 251, and the passage 350 of the cylindrical portion 351, and then the first fuel. It flows into the inside of the cylindrical portion 21 in the radial direction.

  When a current flows through the coil 45, a magnetic circuit is formed around the coil 45. FIG. 3 schematically shows a magnetic circuit formed around the coil 45.

  As shown in FIG. 3, the magnetic circuit passes from the coil holding member 451 and the first cylindrical portion 21 to the outer movable core 65, the magnetic throttle portion 41, the fixed core 40, the fixed member 231, and the third cylindrical portion 23. R65, a path R55 passing from the coil holding member 451 and the first cylindrical portion 21 to the outer movable core 65, the inner movable core 55, the magnetic throttle portion 41, the fixed core 40, the fixed member 231, and the third cylindrical portion 23, These two paths are formed. Among these, since the distance L11 between the magnetic restrictor 41 and the inner movable core 55 in the path R55 is shorter than the distance L12 between the magnetic restrictor 41 and the outer movable core 65 in the path R65, current starts to flow through the coil 45. In some cases, a magnetic circuit is formed mainly in the path R55. As a result, a magnetic attractive force is generated between the fixed core 40 and the inner movable core 55, the inner movable core 55 moves in the valve opening direction together with the inner valve member 25, and the seal portion 252 is separated from the end surface 244. When the seal portion 252 is separated from the end surface 244, the inner nozzle hole 241 is opened. When the inner injection hole 241 is opened, the gas fuel in the first cylinder portion 21 is injected from the inner injection hole 241. As shown in FIG. 3, the inner movable core 55 and the inner valve member 25 move in the valve opening direction until the inner movable core 55 comes into contact with the impact relaxation member 42.

  When a current further flows through the coil 45, the magnetic diaphragm portion 41 facing the inner movable core 55 has a relatively small area, so that the magnetic flux density in the path R55 is saturated. Thereby, the magnetic circuit of the path R65 is easily formed, and a magnetic attractive force capable of moving the outer movable core 65 and the outer valve member 35 is generated between the fixed core 40 and the outer movable core 65. When a magnetic attractive force is generated between the fixed core 40 and the outer movable core 65, the outer movable core 65 moves in the direction of the fixed core 40 together with the outer valve member 35, and as shown in FIG. Separate from 244. When the seal portion 352 is separated from the end surface 244, the outer nozzle holes 242 and 243 are opened. When the outer injection holes 242 and 243 are opened, the gas fuel in the first cylindrical portion 21 is injected from the outer injection holes 242 and 243.

  Next, injection control in the fuel injection valve 1 will be described with reference to FIGS. FIG. 5 shows the relationship between the pulse width of the current controlled by the control unit 50 and the injection amount of the gas fuel. In FIG. 5, the horizontal axis indicates the pulse width Ti of the current, and the vertical axis indicates the injection amount Q of the gas fuel. FIG. 5 shows three energization modes according to the magnitude of the magnetic attractive force generated between the inner movable core 55 and the outer movable core 65 and the fixed core 40.

  In FIG. 5, a solid line G <b> 1 indicates the energization mode when the magnetic attractive force is generated from the magnitude of the generated magnetic attractive force to 0 to such a magnitude that the inner movable core 55 can be moved. Further, a solid line G2 indicates an energization mode when a magnetic attractive force is generated from the magnitude of the generated magnetic attractive force to 0 to such a magnitude that the outer movable core 65 can be moved. Further, the solid line G3 indicates the energization mode when the magnetic attraction force is generated from a magnitude that allows the inner movable core 55 to move to a magnitude that allows the outer movable core 65 to move. It shows with. In FIG. 5, the minimum value of the pulse width of the current that can move through the inner movable core 55 is indicated by a pulse width T1. That is, in order to move the inner movable core 55 reliably, a current having a pulse width T1 or more is required. Moreover, the minimum value of the pulse width of the current that can move the outer movable core 65 is indicated by a pulse width T2. That is, in order to move the outer movable core 65 with certainty, a current having a pulse width T2 or more is required.

  6 and 7 show comparisons of characteristics in some control contents on the characteristic diagram of FIG. 6 and 7 show the characteristics of one injection of gas fuel.

  FIG. 6 shows a comparison between the control P1 and the control P2 in FIG. The total injection amount of the gas fuel by the injection control in the control P1 and the total injection amount of the gas fuel by the injection control in the control P2 are the same injection amount Q1.

  In the control P1, the control unit 50 energizes the coil 45 with the pulse width Pw1 with the current having the maximum current value Am1 (solid line G11 in FIG. 6). The fuel injection amount per unit time at this time is the maximum injection amount Qs1 (solid line G12 in FIG. 6). On the other hand, when the coil 45 is energized with the maximum current value Am2 that is shorter than the pulse width Pw1 and the maximum current value Am1 compared to the pulse width Pw1 (dotted line G21 in FIG. 6), the fuel injection amount per unit time is maximum. The quantity is Qs2 (dotted line G22 in FIG. 6).

  Comparing the control P1 and the control P2, the control P1 injects the gas fuel for a longer time than the control P2. Thereby, the pressure pulsation is smaller in the injection of the gas fuel by the control P1 than in the injection of the gas fuel by the control P2.

  FIG. 7 shows a comparison between the control P3 and the control P4 in FIG. The total injection amount of the gas fuel by the injection control in the control P3 and the total injection amount of the gas fuel by the injection control in the control P4 are the same injection amount Q2.

  In the control P3, the control unit 50 energizes the coil 45 with the pulse width Pw3 with the current having the maximum current value Am3 (solid line G31 in FIG. 7). The fuel injection amount per unit time at this time is the maximum injection amount Qs3 (solid line G32 in FIG. 7). On the other hand, in the control P4, the control unit 50 energizes the coil 45 with the current Am41 so that the inner valve member 25 can be continuously separated from the end face 244 (dotted line G41 in FIG. 7). Thereby, the fuel injection amount per unit time becomes the injection amount Qs41 (dotted line G42 in FIG. 7). Further, the coil 45 is energized with a current having a shorter pulse width Pw4 than the pulse width Pw3 and a current value Am42 smaller than the maximum current value Am3 (dotted line G41 in FIG. 7). As a result, the fuel injection amount per unit time becomes the maximum injection amount Qs42 compared to the injection amount Qs3 (dotted line G42 in FIG. 7).

  Comparing the control P3 and the control P4, the control P4 is injecting a smaller amount of gas fuel for a longer time than the control P3. Thereby, the pressure pulsation is smaller in the injection of the gas fuel by the control P4 than in the injection of the gas fuel by the control P3.

  (A) In the fuel injection valve 1 according to the first embodiment, when a magnetic field is formed by energizing the coil 45, the magnetic attractive force between the inner movable core 55 and the fixed core 40 via the magnetic restrictor 41 is used. The inner valve member 25 moves and the inner nozzle hole 241 opens. Thereafter, when the energization amount to the coil 45 is increased, the magnetic flux density in the magnetic restricting portion 41 provided between the fixed core 40 and the inner movable core 55 is saturated. As a result, the magnetic attractive force between the outer movable core 65 and the fixed core 40 increases, so that the outer valve member 35 moves and the outer nozzle holes 242 and 243 open.

  As described above, in the fuel injection valve 1, the opening and closing of the inner injection hole 241 and the opening and closing of the outer injection holes 242 and 243 can be controlled by controlling the energization of the coil 45, so that each of the plurality of valve members is driven. This eliminates the need for a plurality of drive sources. As a result, the fuel injection valve 1 has the inner injection hole 241 and the outer injection holes 242 and 243, so that it is possible to reduce the size of the fuel injection valve 1 with a simple configuration while expanding the range of the amount of fuel that can be injected.

(B) In the fuel injection valve 1, the distance L11 between the magnetic throttle part 41 and the inner movable core 55 is shorter than the distance L12 between the magnetic throttle part 41 and the outer movable core 65. Thereby, the fuel injection valve 1 can move the inner movable core 55 and the inner valve member 25 in the valve opening direction first when the coil 45 is energized.
In the fuel injection valve 1, the area of the magnetic throttle part 41 facing the inner movable core 55 is smaller than the area of the magnetic throttle part 41 facing the outer movable core 65. As a result, the magnetic flux density between the inner movable core 55 and the magnetic aperture portion 41 is likely to be saturated. Therefore, in the fuel injection valve 1, after the inner movable core 55 and the inner valve member 25 move in the valve opening direction, the outer movable core 65 and the outer valve member 35 can move in the valve opening direction.

  (C) The magnetic diaphragm portion 41 is provided with an impact relaxation member 42 formed of a nonmagnetic material on the radially inner side that is the side facing the inner movable core 55. Thereby, the area of the magnetic throttle part 41 facing the inner movable core 55 is further reduced, and the magnetic flux density is easily saturated. Therefore, in the fuel injection valve 1, after the inner movable core 55 and the inner valve member 25 move in the valve opening direction, the outer movable core 65 and the outer valve member 35 can reliably move in the valve opening direction.

  (D) In the fuel injection valve 1, the inner valve member 25 and the outer valve member 35 can be driven separately by current control to one coil 45, so that each of the plurality of valve members is driven. A plurality of drive sources are not required. Thereby, the manufacturing cost of the fuel injection valve 1 can be reduced.

  (E) Generally, since gas fuel and air are difficult to mix, combustion efficiency of an engine that outputs rotational torque tends to be lowered by burning gas fuel. In the fuel injection valve 1 according to the first embodiment, as shown in FIG. 5, the pressure pulsation of the gas fuel injected by the fuel injection valve 1 is controlled by controlling the current value and the pulse width of energization to the coil 45 by the control unit 50. can do. In particular, when the gas fuel continuously injected from the inner nozzle hole 241 and the gas fuel intermittently injected from the outer nozzle holes 242 and 243 are combined with the gas fuel continuously injected from the inner nozzle hole 241 as in control P4 of FIG. Can be agitated to promote mixing of gaseous fuel and air. Therefore, the fuel injection valve 1 can control the combustion state of the gas fuel in the engine 11.

  (F) The fuel injection valve 1 according to the first embodiment includes an inner injection hole 241 located on the central axis CA1 and an outer injection hole 242 formed in a direction away from the central axis CA1 when viewed from the inner injection hole 241. , 243. Thereby, the inner valve member 25 capable of opening and closing the inner injection hole 241 and the outer valve member 35 capable of opening and closing the outer injection holes 242 and 243 can be moved coaxially. Therefore, the fuel injection valve 1 has good processability, and can further reduce the manufacturing cost while reducing the physique.

  (G) In the fuel injection valve 1 according to the first embodiment, the inner injection hole 241 is formed so that the sectional area is smaller than the total sectional area of the outer injection holes 242 and 243. As a result, when only the inner injection hole 241 is opened, a small amount of gas fuel can be injected, and when both the inner injection hole 241 and the outer injection holes 242 and 243 are opened, a large flow of gas fuel can be injected. It becomes. Therefore, the fuel injection valve 1 can further expand the range of the amount of gas fuel that can be injected.

(Second embodiment)
Next, the valve device according to the second embodiment will be described with reference to FIG. The second embodiment is different from the first embodiment in that the impact reducing member is not provided in the magnetic diaphragm portion.

  The fuel injection valve 2 according to the second embodiment includes a housing 20, an inner valve member 25, an outer valve member 35, a fixed core 40, a magnetic throttle unit 81, a coil 45, a control unit 50, an inner movable core 55, an outer movable core 65, A first spring 71 and a second spring 72 are provided.

  The magnetic throttle portion 81 is provided on the valve closing direction side of the fixed core 40. The magnetic diaphragm 81 is formed in an annular shape. The magnetic diaphragm 81 is formed so that the inner diameter is larger than the inner diameter of the fixed core 40. A space 82 is provided at a position facing the inner movable core 55 on the radially inner side of the magnetic diaphragm portion 81. In the cross-sectional view shown in FIG. 8, the boundary between the fixed core 40 and the magnetic diaphragm 81 is indicated by a two-dot chain line VL8. In FIG. 8, the two-dot chain line VL <b> 8 overlaps with a virtual line when a cross-sectional line representing the radially outer side surface 551 of the inner movable core 55 is extended in the valve opening direction.

  In the fuel injection valve 2, the area of the end face 811 on the valve closing direction side of the magnetic throttle portion 81 facing the inner movable core 55 is smaller than the area of the end face 401 of the fixed core 40 facing the outer movable core 65.

  In the fuel injection valve 2 according to the second embodiment, the magnetic throttle portion 81 has a space 82 located between the fixed core 40 and the inner movable core 55. As a result, the area of the magnetic diaphragm 81 facing the inner movable core 55 is smaller than the area of the magnetic diaphragm 81 facing the outer movable core 65, so that the magnetic force between the fixed core 40 and the inner movable core 55 is reduced. The magnetic flux density in the diaphragm 81 is likely to be saturated. Therefore, the second embodiment has the same effect as the first embodiment.

(Third embodiment)
Next, the valve device according to the third embodiment will be described with reference to FIGS. The third embodiment is different from the first embodiment in that the shape of the inner valve member, the shape of the outer valve member, and the third urging member are provided.

  The fuel injection valve 3 according to the third embodiment includes a housing 20, an inner valve member 26 as a “first valve member”, an outer valve member 36 as a “second valve member”, a fixed core 40, a magnetic throttle portion 41, a coil. 45, a control unit 50, an inner movable core 55, an outer movable core 65, a first spring 71, a second spring 72, and a third spring 73 as an “urging member”.

  The inner valve member 26 is a member formed in a substantially rod shape, and has a shaft portion 251, a seal portion 252, and an inner protrusion 263. The inner valve member 26 is provided so as to be movable relative to the housing 20 and can open and close the inner injection hole 241.

  The inner protruding portion 263 is provided on the side surface 254 on the outer side in the radial direction of the shaft portion 251. The inner protrusion 263 is formed so as to protrude from the side surface 254 in the radially outward direction. In the present embodiment, four inner protrusions 263 are formed at equal intervals on the radially outer side of the shaft portion 251 as shown in FIG.

  The outer valve member 36 is a member formed in a substantially cylindrical shape, and includes a cylindrical portion 351, a seal portion 352, and an outer protruding portion 363. The outer valve member 36 is provided so as to be movable relative to the housing 20, and can open and close the outer injection holes 242 and 243.

  The outer projecting portion 363 is provided on the radially inner side surface 353 of the cylindrical portion 351. As shown in FIG. 10, the outer protruding portion 363 is formed so as to protrude in the radially inward direction from the side surface 353. As shown in FIG. 9, the outer protruding portion 363 is provided at a position farther from the injection unit 24 than the inner protruding portion 263. In the present embodiment, as shown in FIG. 10, four outer protrusions 363 are formed at equal intervals on the radially inner side of the cylindrical portion 351.

  The third spring 73 is provided between the inner protrusion 263 and the outer protrusion 363. The third spring 73 urges the inner protrusion 263 and the outer protrusion 363 so that the inner protrusion 263 and the outer protrusion 363 are separated from each other.

  As shown in FIG. 11, the inner movable core 55 provided in the fuel injection valve 3 has four grooves 552 at the periphery. The four grooves 552 are formed so as to penetrate the inner movable core 55 in the direction along the central axis CA1. The four grooves 552 have a size through which the outer protrusion 363 can pass.

  In this embodiment, when the fuel injection valve 3 is assembled, the inner valve member 26, the inner movable core 55, and the third spring 73 are inserted into the housing 20 from the third cylindrical portion 23 side, and then the outer valve member 36 and the outer movable member are moved. The core 65 is inserted into the housing 20 from the third cylindrical portion 23 side. When the outer valve member 36 and the outer movable core 65 are inserted into the housing 20, the outer protrusion 363 passes through the groove 552. Further, as another assembling method, after the outer valve member 36 and the outer movable core 65 are inserted into the housing 20 from the first cylindrical portion 21 side, the inner valve member 26, the inner movable core 55 and the third spring 73 are first connected. It inserts in the housing 20 from the cylinder part 21 side. When the inner valve member 26, the inner movable core 55 and the third spring 73 are inserted into the housing 20, the outer protrusion 363 passes through the groove 552. Thereby, the inner side valve member 26 and the outer side valve member 36 are provided in the position shown in FIG.

  Next, the operation of the fuel injection valve 3 will be described with reference to FIGS. The fuel injection valve 3 is in the state shown in FIG. 9 when no current flows through the coil 45. When a current flows through the coil 45 and a magnetic circuit is formed around the coil 45, a magnetic attractive force is generated between the inner movable core 55 and the fixed core 40. When the magnetic attraction force increases to some extent, the inner movable core 55 and the inner valve member 26 move in the valve opening direction. Thereby, as shown in FIG. 12, the seal part 252 is separated from the end surface 244, and the inner injection hole 241 is opened.

  When the inner valve member 26 moves in the valve opening direction, the distance between the inner protruding portion 263 and the outer protruding portion 363 becomes shorter than that in the closed state (see FIG. 12). When the distance between the inner protrusion 263 and the outer protrusion 363 becomes shorter, the third spring 73 is compressed. Thereby, the outer valve member 36 is strongly urged in the valve opening direction by the compressed third spring 73 as compared with the state of FIG.

  When a current further flows through the coil 45, the magnetic flux density between the fixed core 40 and the inner movable core 55 is saturated, and a magnetic attractive force is generated between the fixed core 40 and the outer movable core 65. When the magnetic attractive force between the fixed core 40 and the outer movable core 65 increases to some extent, the outer movable core 65 and the outer valve member 36 move in the valve opening direction. When the outer valve member 36 moves in the valve opening direction, the seal portion 352 is separated from the end surface 244 and the outer nozzle holes 242 and 243 are opened.

  In the fuel injection valve 3 according to the third embodiment, the opening and closing of the inner injection hole 241 and the opening and closing of the outer injection holes 242 and 243 can be controlled by controlling the energization to the coil 45. Thereby, 3rd embodiment has the same effect as 1st embodiment.

  The fuel injection valve 3 according to the third embodiment includes a third spring 73 that biases the inner valve member 26 in the valve closing direction and biases the outer valve member 36 in the valve opening direction. Thereby, when the inner injection hole 241 is closed, the inner valve member 26 is urged in the valve closing direction by the urging force of the third spring 73, so that the liquid tightness in the inner injection hole 241 is reliably maintained. Can do. Further, when the inner valve member 26 moves in the valve opening direction, the inner valve member 26 moves at a lower speed than the first embodiment by the biasing force of the third spring 73. Thereby, the impact when the inner movable core 55 that moves together with the inner valve member 26 collides with the impact relaxation member 42 can be reduced. Therefore, the third embodiment can reduce the collision noise caused by the collision between the inner movable core 55 and the impact relaxation member 42 while preventing the damage due to the collision between the inner movable core 55 and the impact relaxation member 42.

  In the fuel injection valve 3 according to the third embodiment, when the inner injection hole 241 is open, a biasing force in the valve opening direction of the third spring 73 acts on the outer valve member 36, so the outer injection holes 242 and 243 are , Relatively easy to open. Thereby, since 3rd embodiment can make the magnetic attraction force for moving the outer side valve member 36 in the valve opening direction small compared with 1st embodiment, the physique of the coil 45 can be made small. In the third embodiment, since the magnetic attractive force for moving the outer valve member 36 in the valve opening direction can be reduced, the valve opening responsiveness of the outer nozzle holes 242 and 243 can be improved.

  Further, in the fuel injection valve 3 according to the third embodiment, when the coil 45 is the same as that of the first embodiment, the lift amount of the outer valve member 36 can be increased using the biasing force of the third spring 73. . Thereby, the range of the injection amount of the gas fuel which can be injected by the fuel injection valve 3 can be expanded.

(Fourth embodiment)
Next, the valve device according to the fourth embodiment will be described with reference to FIGS. The fourth embodiment is different from the first embodiment in that an elastic member is provided on the inner valve member and the shape of the outer valve member.

  The fuel injection valve 4 according to the fourth embodiment includes a housing 20, an inner valve member 25 as “one of the first valve member or the second valve member”, an elastic member 27, “the first valve member or the second valve member”. The outer valve member 36, the fixed core 40, the magnetic throttle part 41, the coil 45, the control part 50, the inner movable core 55, the outer movable core 65, the first spring 71, and the second spring 72 as the other of these. Prepare.

  The elastic member 27 is provided on the outer side surface 254 of the shaft portion 251 in the radial direction. The elastic member 27 is formed so as to protrude radially outward from the side surface 254, and can move relative to the housing 20 integrally with the inner valve member 25. The elastic member 27 is formed of an elastic material, and can engage with the outer protrusion 363 of the outer valve member 36 when the inner injection hole 241 is opened.

  Next, the operation of the fuel injection valve 4 will be described with reference to FIGS. The fuel injection valve 4 is in the state shown in FIG. 13 when no current flows through the coil 45. When a magnetic circuit is formed around the coil 45 and the magnetic attractive force between the inner movable core 55 and the fixed core 40 is increased to some extent, the seal portion 252 is separated from the end face 244 and the inner injection hole 241 is opened. When the inner nozzle hole 241 opens, the elastic member 27 engages with the outer protrusion 363 and deforms as shown in FIG. Thereby, the outer valve member 36 acts so that its own restoring force due to the deformation of the elastic member 27 moves the outer valve member 36 in the valve opening direction (open arrow F4 in FIG. 14).

  When a current further flows through the coil 45, a magnetic attractive force capable of moving the outer movable core 65 and the outer valve member 36 is generated between the fixed core 40 and the outer movable core 65, and the outer movable core 65 and the outer valve member 36 are Move in the valve opening direction. When the outer valve member 36 moves in the valve opening direction, the seal portion 352 is separated from the end surface 244 and the outer nozzle holes 242 and 243 are opened.

  In the fuel injection valve 4 according to the fourth embodiment, the opening and closing of the inner injection hole 241 and the opening and closing of the outer injection holes 242 and 243 can be controlled by controlling the energization to the coil 45. Thereby, 4th embodiment has the same effect as 1st embodiment.

  In the fuel injection valve 4 according to the fourth embodiment, the inner valve member 25 is provided with an elastic member 27 that urges the outer valve member 36 in the valve opening direction when engaged with the outer protrusion 363. When the elastic member 27 is engaged with the outer protrusion 363 by the movement of the inner valve member 25 in the valve opening direction, the inner valve member 25 moves at a lower speed than in the first embodiment. Thereby, the impact when the inner movable core 55 that moves together with the inner valve member 25 collides with the impact relaxation member 42 can be reduced. Therefore, the fourth embodiment can reduce the collision sound caused by the collision between the inner movable core 55 and the impact relaxation member 42 while preventing the damage due to the collision between the inner movable core 55 and the impact relaxation member 42.

  In the fuel injection valve 4 according to the fourth embodiment, when the inner injection hole 241 is open, the urging force of the elastic member 27 in the valve opening direction acts on the outer valve member 36. Therefore, the outer injection holes 242 and 243 are It becomes relatively easy to open. Thereby, since the magnetic attraction force for moving the outer valve member 36 in the valve opening direction can be reduced as compared with the first embodiment, the physique of the coil 45 can be reduced. Further, the valve opening response of the outer nozzle holes 242 and 243 can be improved.

  In the fuel injection valve 4 according to the fourth embodiment, when the inner injection hole 241 is opened, the restoring force of the elastic member 27 acts on the outer valve member 36 so as to move the outer valve member 36 in the valve opening direction. From this, when the coil 45 is the same as 1st embodiment, the range of the injection amount of the gas fuel which the fuel injection valve 4 can inject can be expanded.

(Fifth embodiment)
Next, a valve device according to a fifth embodiment will be described with reference to FIGS. The fifth embodiment is different from the first embodiment in that an elastic member is provided on the outer valve member and the shape of the inner valve member.

  The fuel injection valve 5 according to the fifth embodiment includes a housing 20, an inner valve member 26 as “one of the first valve member and the second valve member”, and “one of the first valve member and the second valve member”. The outer valve member 35, the elastic member 37, the fixed core 40, the magnetic throttle unit 41, the coil 45, the control unit 50, the inner movable core 55, the outer movable core 65, the first spring 71, and the second spring 72. Prepare.

  The elastic member 37 is provided on the side surface 353 on the radially inner side of the cylindrical portion 351. The elastic member 37 is formed so as to protrude radially inward from the side surface 353, and can move relative to the housing 20 together with the outer valve member 35. The elastic member 37 is formed of an elastic material, and can engage with the inner protrusion 263 of the inner valve member 26 when the inner injection hole 241 is opened. In the present embodiment, four elastic members 37 are provided on the side surface 353 at equal intervals.

  Next, the operation of the fuel injection valve 5 will be described with reference to FIGS. The fuel injection valve 5 is in the state shown in FIG. 15 when no current flows through the coil 45. When a magnetic circuit is formed around the coil 45 and the magnetic attractive force between the inner movable core 55 and the fixed core 40 is increased to some extent, the seal portion 252 is separated from the end face 244 and the inner injection hole 241 is opened. When the inner injection hole 241 opens, the inner protrusion 263 engages with the elastic member 37 as shown in FIG. Thus, the outer valve member 35 is deformed so that the elastic member 37 is deformed, and its own restoring force due to the deformation of the elastic member 37 moves the outer valve member 35 in the valve opening direction (open arrow F5 in FIG. 16). .

  When a current further flows through the coil 45, a magnetic attractive force capable of moving the outer movable core 65 and the outer valve member 35 is generated between the fixed core 40 and the outer movable core 65, and the outer movable core 65 and the outer valve member 35 are Move in the valve opening direction. When the outer valve member 35 moves in the valve opening direction, the seal portion 352 is separated from the end surface 244 and the outer nozzle holes 242 and 243 are opened.

  In the fuel injection valve 5 according to the fifth embodiment, the opening and closing of the inner injection hole 241 and the opening and closing of the outer injection holes 242 and 243 can be controlled by controlling the energization to the coil 45. Thereby, 5th embodiment has the same effect as 1st embodiment.

  The fuel injection valve 5 according to the fifth embodiment includes an elastic member 37 that biases the outer valve member 35 in the valve opening direction when engaged with the inner protrusion 263. When the elastic member 37 is engaged with the inner protrusion 263 by the movement of the inner valve member 26 in the valve opening direction, the inner valve member 26 moves at a lower speed than in the first embodiment. Thereby, the impact when the inner movable core 55 that moves together with the inner valve member 26 collides with the impact relaxation member 42 can be reduced. Therefore, the fifth embodiment can reduce the collision noise caused by the collision between the inner movable core 55 and the impact relaxation member 42 while preventing the damage due to the collision between the inner movable core 55 and the impact relaxation member 42.

  Further, in the fuel injection valve 5 according to the fifth embodiment, when the inner injection hole 241 is open, the urging force in the valve opening direction due to the restoring force of the elastic member 37 acts on the outer valve member 35, so the outer injection hole 242 and 243 are relatively easy to open. Thereby, since the magnetic attraction force for moving the outer valve member 35 in the valve opening direction can be made smaller than in the first embodiment, the physique of the coil 45 can be made smaller. Moreover, the valve opening responsiveness of the outer injection holes 242 and 243 can be improved.

  In the fuel injection valve 5 according to the fifth embodiment, when the inner injection hole 241 is open, the restoring force of the elastic member 37 acts on the outer valve member 35 so as to move the outer valve member 35 in the valve opening direction. Thereby, when the coil 45 is the same as that of the first embodiment, the range of the injection amount of the gas fuel that can be injected by the fuel injection valve 5 can be expanded.

(Sixth embodiment)
Next, a valve device according to a sixth embodiment will be described with reference to FIGS. The sixth embodiment is different from the first embodiment in the shapes of the inner valve member, the inner movable core, the outer valve member, and the outer valve member.

  The fuel injection valve 6 according to the sixth embodiment includes a housing 20, an inner valve member 28 as a “first valve member”, an outer valve member 38 as a “second valve member”, a fixed core 40, a magnetic throttle part 41, a coil. 45, a control unit 50, an inner movable core 56 as a “first movable core”, an outer movable core 66 as a “second movable core”, a sliding member 67, a first spring 71, and a second spring 72. .

  The inner valve member 28 is a member formed in a substantially rod shape, and includes a shaft portion 281 and a seal portion 282. The inner valve member 28 is provided so as to be movable relative to the housing 20.

  The shaft portion 281 is a rod-shaped portion made of a nonmagnetic material. The shaft portion 281 is provided so that the end portion on the valve closing direction side is located in the radially inward direction of the impact relaxation member 42. The shaft portion 281 has a passage 280 that opens to an end surface 283 on the valve opening direction side and a radially outer side surface 284 in the vicinity of the seal portion 282. In the passage 280, fuel can flow.

  The seal portion 282 is provided at the end of the shaft portion 281 on the valve closing direction side. The seal portion 282 is made of an elastic material, for example, rubber. The seal part 282 is formed so as to be able to close the opening of the inner injection hole 241 on the first cylinder part 21 side when contacting the end surface 244 of the injection part 24 on the first cylinder part 21 side. As a result, the inner valve member 28 can open and close the inner injection hole 241.

  The outer valve member 38 is a member formed in an annular shape from an elastic material, for example, rubber. The outer valve member 38 is positioned in the radially outward direction of the inner valve member 28, can be moved relative to the housing 20, and can be brought into contact with the end surface 244 of the injection unit 24. The outer valve member 38 is formed so as to be able to close the opening on the first tube portion 21 side of the outer injection holes 242 and 243 when coming into contact with the end surface 244 of the injection portion 24. Thereby, the outer valve member 38 can open and close the outer injection holes 242 and 243.

  The inner movable core 56 is a member formed in a substantially cylindrical shape from a magnetic material. The inner movable core 56 is provided on the side surface 284 of the end portion on the valve opening direction side of the shaft portion 281 of the inner valve member 28. The inner movable core 56 can reciprocate integrally with the inner valve member 28. When the coil 45 forms a magnetic field, the inner movable core 56 generates a magnetic attractive force with the fixed core 40. When the inner movable core 56 moves in the valve opening direction, the inner movable core 56 comes into contact with the end surface 421 of the impact relaxation member 42.

  The outer movable core 66 is a member formed in a substantially cylindrical shape from a magnetic material. The outer movable core 66 is located in the radially outward direction of the inner valve member 28 and the inner movable core 56, and an outer valve member 38 is provided at an end portion on the valve closing direction side. The outer movable core 66 can reciprocate integrally with the outer valve member 38. The outer movable core 66 has a passage 660 that can communicate with a passage 280 that opens to the side surface 284 of the inner valve member 28. When the coil 45 forms a magnetic field, the outer movable core 66 generates a magnetic attractive force between the outer movable core 66 and the fixed core 40.

  The sliding member 67 is a member formed of a nonmagnetic material provided on the radially inner side surface 661 of the outer movable core 66. In the present embodiment, the sliding member 67 can slide on the side surface 284 of the inner valve member 28.

  As shown in FIG. 17, the injection portion 24 of the housing 20 provided in the fuel injection valve 6 has a protrusion 245 formed so as to protrude from the end face 244 in the valve opening direction. The protrusion 245 is formed in an annular shape around the end surface 244 with which the seal portion 282 can abut. The side surface 246 on the radially inner side of the protrusion 245 can slide on the end portion on the valve opening direction side of the shaft portion 281 of the inner valve member 28. The protrusion 245 has a passage 247 that communicates the radially inner side and the radially outer side of the protrusion 245.

  In the fuel injection valve 6, the distance between the radially outer side surface 381 of the outer valve member 38 and the inner wall surface 211 of the housing 20 facing the side surface 381 is a distance L 61. Further, the distance between the radially outer side surface 662 of the outer movable core 66 and the inner wall surface 211 of the housing 20 facing the side surface 662 is a distance L62. In the fuel injection valve 6, the distances L 61 and L 62 are the distance L 60 between the radially inner side surface 671 of the sliding member 67 and the radially outer side surface 284 of the inner valve member 28 facing the side surface 671 of the sliding member 67. Bigger than that.

  Next, the operation of the fuel injection valve 6 will be described with reference to FIGS. The fuel injection valve 6 is in the state shown in FIG. 17 when no current flows through the coil 45. A magnetic circuit is formed around the coil 45 by energizing the coil 45. When a magnetic circuit is formed around the coil 45 and the magnetic attractive force between the inner movable core 56 and the fixed core 40 is increased to some extent, the seal portion 282 is separated from the end face 244. Thereby, the inner nozzle hole 241 is opened. When the inner injection hole 241 is open, as shown in FIG. 18, the end portion on the valve closing direction side of the inner valve member 28 is in a position slidable on the side surface 246 of the projection 245 of the injection unit 24. Further, the end portion on the valve opening direction side of the inner valve member 28 is in a position slidable on the side surface 422 on the radially inner side of the impact relaxation member 42.

  When a current further flows through the coil 45, a magnetic attractive force is generated between the fixed core 40 and the outer movable core 66. When the magnetic attraction force is large enough to move the outer movable core 66 and the outer valve member 38, the outer movable core 66 and the outer valve member 38 are moved to the inner valve member by the sliding member 67 that slides on the inner valve member 28. It moves in the valve opening direction while being guided by 28. When the outer valve member 38 moves in the valve opening direction, the outer valve member 38 is separated from the end surface 244 and the outer injection holes 242 and 243 are opened.

  In the fuel injection valve 6 according to the sixth embodiment, the opening and closing of the inner injection hole 241 and the opening and closing of the outer injection holes 242 and 243 can be controlled by controlling the energization to the coil 45. Thereby, 6th embodiment has the same effect as 1st embodiment.

  In the fuel injection valve 6 according to the sixth embodiment, the inner valve member 28 made of a nonmagnetic material slides on the side surface 246 of the injection part 24 whose end in the valve closing direction is made of a nonmagnetic material. The end of the valve opening direction side is slidable on the side surface 422 of the impact relaxation member 42 formed of a nonmagnetic material. Thus, in the fuel injection valve 6, by limiting the sliding portion to a non-magnetic material, it is possible to prevent surface roughness of the sliding portion at a lower cost than when a relatively expensive surface coating such as DLC is applied. it can. Therefore, in the sixth embodiment, it is possible to inexpensively suppress the occurrence of problems such as adhesion of the inner valve member 28 due to surface roughness.

  Further, in the fuel injection valve 6 according to the sixth embodiment, the inner valve member 28 is guided in its reciprocating movement only by sliding the end portion on the valve closing direction side and the end portion on the valve opening direction side. Yes. Thereby, in the fuel injection valve 6, since the sliding location for guiding the movement of the inner valve member 28 can be reduced as much as possible, the processing time of the sliding location can be shortened. Therefore, the sixth embodiment can further suppress the occurrence of surface roughness at the sliding portion at a lower cost.

  In the fuel injection valve 6 according to the sixth embodiment, the outer movable core 66 and the outer valve member 38 are guided to the inner valve member 28 formed of a nonmagnetic material by a sliding member 67 that slides on the inner valve member 28. While moving in the valve opening direction. Thereby, the surface roughness of the sliding part can be prevented as described above. Therefore, 6th embodiment can suppress generation | occurrence | production of malfunctions, such as adhesion of the outer valve member 38 by surface roughness.

  Further, in the fuel injection valve 6 according to the sixth embodiment, the distance L61 between the outer valve member 38 and the housing 20 and the distance L62 between the outer movable core 66 and the housing 20 are determined by the sliding member 67 and the inner valve member 28. It is larger than the distance L60. Thereby, even if the outer movable core 66 and the outer valve member 38 move in the direction perpendicular to the central axis CA1, the first movable housing 66 in which the outer movable core 66 and the outer valve member 38 are formed of a magnetic material. It can prevent sliding to the cylinder part 21 grade | etc.,. Therefore, 6th embodiment can suppress generation | occurrence | production of malfunctions, such as adhesion of the outer valve member 38 by the surface roughness of a sliding location. Further, since the outer valve member 38 is guided by the inner valve member 28 that can reciprocate on the central axis CA1, movement in a direction perpendicular to the central axis CA1 can be suppressed. Thereby, the outer nozzle holes 242 and 243 open valve characteristics can be stabilized.

(Seventh embodiment)
Next, a valve device according to a seventh embodiment will be described with reference to FIGS. The seventh embodiment is different from the first embodiment in the control content of energization to the coil.

  As shown in FIG. 19, the fuel injection valve 7 according to the seventh embodiment includes a housing 20, an inner valve member 25, an outer valve member 35, a fixed core 40, a magnetic throttle unit 41, a coil 45, a control unit 60, and an inner movable core. 55, an outer movable core 65, a first spring 71, and a second spring 72.

  Gas fuel injection control by the control unit 60 will be described with reference to FIGS. In each of FIGS. 20 to 22, the current value I, the injection amount Qi of gas fuel from the inner injection hole 241 per unit time, and the units from the outer injection holes 242 and 243 according to the magnitude of the energization amount to the coil 45. The injection amount Qo of the gas fuel per time and the total injection amount Qtotal of the gas fuel per unit time are shown. Each of FIGS. 20 to 22 shows the characteristics of two injections of gas fuel.

  The characteristic diagram shown in FIG. 20 shows the characteristic of the fuel injection valve 7 when gas fuel is injected only from the inner injection hole 241. The controller 60 causes the current of the current value Am21 to flow through the coil 45 immediately after starting energization of the coil 45 at time t21. As a result, the inner valve member 25 is separated from the end surface 244 of the injection unit 24, and the gas fuel in the housing 20 is injected from the inner injection hole 241. When the gas fuel in the housing 20 is injected from the inner injection hole 241, the control unit 60 sets the current value to be supplied to the coil 45 to a current value Am22 that is smaller than the current value Am21 (time t22 in FIG. 18). While the current flows through the coil 45, the gas fuel injected from the inner injection hole 241 has a maximum fuel injection amount per unit time of the injection amount Q21. Therefore, the total injection amount of the gas fuel per unit time of the fuel injection valve according to the sixth embodiment is the injection amount Q21.

  The characteristic diagram shown in FIG. 21 shows the characteristic of the fuel injection valve 7 when gas fuel is injected in the order of the inner injection hole 241 and the outer injection holes 242 and 243. The controller 60 causes the current of the current value Am31 to flow through the coil 45 immediately after starting energization of the coil 45 at time t31. As a result, the inner valve member 25 is separated from the end surface 244 of the injection portion 24, and the gas fuel in the housing 20 is injected from the inner injection hole 241. When the gas fuel in the housing 20 is injected from the inner injection hole 241, the control unit 60 sets the current value to be supplied to the coil 45 to a current value Am32 that is smaller than the current value Am31 (time t32 in FIG. 19). When the current of the current value Am32 flows through the coil 45, the outer injection holes 242 and 243 are open, and the gas fuel in the housing 20 is injected from the inner injection holes 241 and the outer injection holes 242 and 243. The fuel injection amount at this time is the total amount of the injection amount Q31 from the inner injection hole 241 and the injection amounts Q32 from the outer injection holes 242 and 243. When the energization to the coil 45 is terminated at time t33, the inner nozzle hole 241 is closed after the outer nozzle holes 242 and 243 are closed.

  The characteristic diagram shown in FIG. 22 shows the characteristics of the fuel injection valve 7 when the gas fuel is intermittently injected from the outer injection holes 242 and 243 while the gas fuel is continuously injected from the inner injection hole 241. ing. The control unit 60 causes the current of the current value Am41 to flow through the coil 45 so as to maintain the state in which the inner valve member 25 is separated from the end surface 244 of the injection unit 24. At time t41, a current having a current value Am42 that is higher than the current value Am41 is passed through the coil 45. As a result, the outer valve member 35 is separated from the injection portion 24, so that the gas fuel in the housing 20 is injected from the outer injection holes 242 and 243 in addition to the inner injection hole 241. When gas fuel is injected from the outer injection holes 242 and 243, the control unit 60 sets the current value to be supplied to the coil 45 to a current value Am43 that is smaller than the current value Am42 and higher than the current value Am41 (time in FIG. 20). t42). The fuel injection amount at this time is the total amount of the injection amount Q41 from the inner injection hole 241 and the injection amounts Q42 from the outer injection holes 242 and 243. When energization of the coil 45 is terminated at time t43, the inner nozzle hole 241 is closed after the outer nozzle holes 242 and 243 are closed.

  In the fuel injection valve 7 according to the seventh embodiment, a relatively high current flows through the coil 45 immediately after energization of the coil 45 is started. As a result, the inner injection hole 241 opens quickly, and the gas fuel in the housing 20 is injected from the inner injection hole 241. When the gas fuel in the housing 20 is injected out of the housing 20, the pressure in the housing 20 decreases, so that the inner valve member 25 and the outer valve member 35 are easily separated from the injection unit 24. Therefore, in the seventh embodiment, it is possible to improve the valve opening response in the injection of gas fuel.

  Further, in the fuel injection valve 7, since the valve opening response in the injection of the gas fuel is improved, it is possible to shorten the time during which the current flows through the coil 45. Thereby, the heat_generation | fever by the electricity supply to the coil 45 can be suppressed. Moreover, since electric energy can be saved, energy consumption can be reduced.

(Eighth embodiment)
Next, the valve device according to the eighth embodiment will be described with reference to FIGS. The eighth embodiment is different from the first embodiment in the control content of the current in the control unit.

  As shown in FIG. 23, the fuel injection valve 8 according to the eighth embodiment includes a housing 20, an inner valve member 25, an outer valve member 35, a fixed core 40, a magnetic restrictor 41, a coil 45, a controller 70, an inner movable core. 55, an outer movable core 65, a first spring 71, and a second spring 72.

  Gas fuel injection control by the control unit 70 and the operation of the fuel injection valve 8 will be described with reference to FIGS. FIG. 24 shows temporal changes in the current value I, the magnetic attractive force Ps between the movable core and the fixed core 40, and the lift amount Mv of the valve member. In the characteristic diagram showing the magnetic attractive force Ps between the movable core and the fixed core 40, the magnetic attractive force between the inner movable core 55 and the fixed core 40 is indicated by a dotted line Lp11, and the outer movable core 65 and the fixed core 40 are Is indicated by a solid line Lp12. In the characteristic diagram showing the lift amount Mv of the valve member, the lift amount of the inner valve member 25 is indicated by a dotted line Lp21, and the lift amount of the outer valve member 35 is indicated by a solid line Lp22. 25 to 27 show the fuel injection valve 8 in different states.

  As shown in FIG. 24, the controller 70 starts energizing the coil 45 at time t51. As the current flowing through the coil 45 gradually increases, the magnetic attractive force Ps between the movable core and the fixed core 40 also increases. When the magnetic attractive force between the inner movable core 55 and the fixed core 40 reaches a predetermined value Psi at time t52, the inner movable core 55 moves in the valve opening direction together with the inner valve member 25, and the seal portion 252 moves from the end surface 244. Separate. Here, the predetermined value Psi is a force in the valve closing direction based on the urging force of the first spring 71 and the pressure of the gas fuel in the first cylindrical portion 21 acting on the inner movable core 55 and the inner valve member 25. Is the sum of When the seal portion 252 is separated from the end surface 244, the inner injection hole 241 is opened, and the gas fuel in the first cylinder portion 21 is injected from the inner injection hole 241. As shown in FIG. 25, the inner movable core 55 and the inner valve member 25 move in the valve opening direction until the inner movable core 55 comes into contact with the impact relaxation member 42 (lift amount L11 at time t53 in FIG. 24).

  When the inner movable core 55 moves in the valve opening direction together with the inner valve member 25, the distance between the inner movable core 55 and the fixed core 40 becomes shorter. As a result, the magnetic attractive force Ps between the inner movable core 55 and the fixed core 40 increases at a large increase rate compared to the increase rate of the current value I and the lift amount Mv of the inner valve member 25, as shown in FIG. (From time t52 to time t53 in FIG. 24).

  When the value of the current flowing through the coil 45 is further increased after the inner movable core 55 abuts against the impact relaxation member 42 at time t53, the magnetic attraction force between the outer movable core 65 and the fixed core 40 becomes a predetermined value at time t54. It becomes the value Pso. Here, the predetermined value Pso is a force in the valve closing direction based on the urging force of the second spring 72 and the pressure of the gas fuel in the first cylindrical portion 21 acting on the outer movable core 65 and the outer valve member 35. Is the sum of When the magnetic attractive force between the outer movable core 65 and the fixed core 40 reaches a predetermined value Pso, the outer movable core 65 moves in the valve opening direction together with the outer valve member 35, and the seal portion 352 is separated from the end surface 244. When the seal portion 352 is separated from the end surface 244, the outer injection holes 242 and 243 are opened, and the gas fuel in the first cylinder portion 21 is injected from the outer injection holes 242 and 243. As shown in FIG. 26, the outer movable core 65 and the outer valve member 35 move in the valve opening direction until the outer movable core 65 contacts the end surface 401 of the fixed core 40 (lift amount L12 at time t55 in FIG. 24). .

  When the outer movable core 65 moves in the valve opening direction together with the outer valve member 35, the distance between the outer movable core 65 and the fixed core 40 becomes shorter. Thereby, since the magnetic circuit of the path R65 is easily formed, the magnetic attractive force Ps in the magnetic circuit of the path R55 is reduced (a dotted line Lp11 from time t54 to time t55 in FIG. 24).

  When the outer movable core 65 contacts the end surface 401 of the fixed core 40 at time t55, the control unit 70 changes the current value to a current value Am52 that is smaller than the maximum current value Am51 in the control shown in FIG. From time t55 to time t57). As a result, both the magnetic attractive force between the inner movable core 55 and the fixed core 40 and the magnetic attractive force between the outer movable core 65 and the fixed core 40 are reduced.

  When the magnetic attractive force between the inner movable core 55 and the fixed core 40 becomes smaller than the predetermined value Psi between time t55 and time t57, the inner movable core 55 moves away from the fixed core 40 together with the inner valve member 25. Then, the valve moves in the valve closing direction (time t56 in FIG. 24). When the inner movable core 55 moves in the valve closing direction, the seal portion 252 contacts the end surface 244 at time t58. At this time, since the magnetic attractive force between the outer movable core 65 and the fixed core 40 is larger than the predetermined value Pso, the outer movable core 65 remains in contact with the end surface 401 of the fixed core 40. That is, the current value Am52 is a current value at which the magnetic attraction force between the inner movable core 55 and the fixed core 40 is smaller than the predetermined value Psi, and the magnetic value between the outer movable core 65 and the fixed core 40. This is a current value at which the attractive force becomes larger than the predetermined value Pso. Thereby, as shown in FIG. 27, the fuel injection valve 8 is in a state where the inner injection hole 241 is closed and the outer injection holes 242 and 243 are opened.

  Next, injection control of gas fuel by the control unit 70 different from that in FIG. 24 will be described with reference to FIG. FIG. 28 shows time variations of the current value I, the magnetic attractive force Ps between the movable core and the fixed core 40, and the lift amount Mv of the valve member, as in FIG. FIG. 28 is a characteristic diagram when the inner nozzle hole 241 is opened and closed and the outer nozzle holes 242 and 243 are opened and closed twice.

  As shown in FIG. 28, the controller 70 starts energizing the coil 45 at time t61. When the magnetic attractive force between the inner movable core 55 and the fixed core 40 reaches a predetermined value Psi at time t62, the inner movable core 55 moves in the valve opening direction together with the inner valve member 25, so that the inner injection hole 241 opens. Thereafter, at time t63, the lift amount of the inner valve member 25 becomes the lift amount L11. In the control shown in FIG. 28, the control unit 70 maintains the current value at the current value Am61 so that the lift amount of the inner valve member 25 maintains the lift amount L11 from time t63 to time t64.

  When the value of the current flowing through the coil 45 is increased at time t64, the magnetic attractive force between the outer movable core 65 and the fixed core 40 becomes a predetermined value Pso at time t65. As a result, the outer movable core 65 moves in the valve opening direction together with the outer valve member 35, so that the outer injection holes 242 and 243 are opened.

  After the lift amount of the outer valve member 35 reaches the lift amount L12, the control unit 70 changes the current value to a current value Am63 that is smaller than the maximum current value Am62 in the control shown in FIG. 28 (from time t66 in FIG. 28). Until time t68). Here, the current value Am63 is a current value at which the magnetic attractive force between the inner movable core 55 and the fixed core 40 is smaller than the predetermined value Psi, and is between the outer movable core 65 and the fixed core 40. This is a current value at which the magnetic attractive force becomes larger than the predetermined value Pso. Thereby, since the inner movable core 55 is separated from the fixed core 40 at time t67, the inner injection hole 241 is closed while the outer injection holes 242 and 243 are opened in the fuel injection valve 8.

  At time t69 after time t68, the control unit 70 gradually decreases the current value. As a result, as shown in FIG. 28, the magnetic attractive force between the outer movable core 65 and the fixed core 40 becomes smaller than the predetermined value Pso, so that the outer movable core 65 is separated from the end surface 401 of the fixed core 40. Move in the valve closing direction. When the outer movable core 65 moves in the valve closing direction, the seal portion 352 comes into contact with the end surface 244, so that the outer injection holes 242 and 243 are closed (time t60 in FIG. 28). In the control shown in FIG. 28, after time t60, the control unit 70 repeats the operation from time t61 to time t69 described above to open the inner injection hole 241, open the outer injection holes 242, 243, and inner injection hole. It repeats in this order of closing the valve 241, closing the outer nozzle holes 242 and 243, and fully closing.

  Next, injection control of gas fuel by the control unit 70 different from those in FIGS. 24 and 28 will be described with reference to FIG. FIG. 29 shows changes over time in the current value I, the magnetic attractive force Ps between the movable core and the fixed core 40, and the lift amount Mv of the valve member, as in FIGS.

  As shown in FIG. 29, the control unit 70 starts energizing the coil 45 at time t70. When the magnetic attractive force between the inner movable core 55 and the fixed core 40 reaches a predetermined value Psi at time t71, the inner movable core 55 moves in the valve opening direction together with the inner valve member 25, and the inner injection hole 241 opens. Thereafter, at time t72, the lift amount of the inner valve member 25 becomes the lift amount L11. In the control shown in FIG. 29, the control unit 70 maintains the current value at the current value Am71 so that the lift amount of the inner valve member 25 maintains the lift amount L11 from time t72 to time t73.

  When the value of the current flowing through the coil 45 is increased at time t73, the magnetic attractive force between the outer movable core 65 and the fixed core 40 becomes a predetermined value Pso at time t74. Thereby, the outer movable core 65 moves in the valve opening direction together with the outer valve member 35, and the outer injection holes 242 and 243 are opened.

  After the lift amount of the outer valve member 35 becomes the lift amount L12, the current value is changed to a current value Am73 that is smaller than the maximum current value Am72 (time t75 in FIG. 29) in the control shown in FIG. Here, the current value Am73 is a current value at which the magnetic attractive force between the inner movable core 55 and the fixed core 40 is smaller than the predetermined value Psi, and is between the outer movable core 65 and the fixed core 40. This is a current value at which the magnetic attractive force becomes larger than the predetermined value Pso. Thereby, in the fuel injection valve 8, while the inner injection hole 241 is closed at the time t76, the outer injection holes 242 and 243 are kept open.

  At time t77 after time t76, the control unit 70 gradually decreases the current value. As a result, as shown in FIG. 29, the magnetic attractive force between the outer movable core 65 and the fixed core 40 becomes smaller than the predetermined value Pso, so that the outer movable core 65 moves in the valve closing direction. At this time, the control unit 70 increases the current value again at time t78 after time t77. Thereby, the magnetic attractive force between the inner movable core 55 and the fixed core 40 is increased.

  When the outer movable core 65 moves in the valve closing direction, the seal portion 352 comes into contact with the end surface 244, so that the outer injection holes 242 and 243 are closed (time t81 in FIG. 29). At this time, in the control shown in FIG. 29, since the magnetic attractive force between the inner movable core 55 and the fixed core 40 becomes a predetermined value Psi, the inner movable core 55 moves in the valve opening direction together with the inner valve member 25. The inner nozzle hole 241 opens.

  After time t81, the control unit 70 performs the same control from time t72 to time t78 described above from time t82 to time t88. Accordingly, in the control shown in FIG. 29, the control unit 70 alternately opens the inner injection hole 241 and the outer injection holes 242 and 243, and at least one of the inner injection hole 241 and the outer injection holes 242 and 243 is opened. Maintain the state.

  In the fuel injection valve 8 according to the eighth embodiment, the controller 70 has a magnetic attraction force between the inner movable core 55 and the fixed core 40 in a state where the inner injection hole 241 and the outer injection holes 242 and 243 are open. A current having a current value that is smaller than the predetermined value Psi and having a magnetic attraction force between the outer movable core 65 and the fixed core 40 larger than the predetermined value Pso is applied. Thereby, in the fuel injection valve 8, only the outer injection holes 242 and 243 are opened in addition to the state where only the inner injection holes 241 are opened and the state where the inner injection holes 241 and the outer injection holes 242 and 243 are opened. Gas fuel can be injected while Therefore, in the eighth embodiment, the injection of gas fuel can be multistaged as compared with the first embodiment.

  In the fuel injection valve 8, the inner injection holes 241 and the outer injection holes 242 and 243 can be opened alternately as in the control shown in FIG. In the fuel injection valve 8, since the injection amount of the gas fuel in the inner injection hole 241 and the injection amount of the gas fuel in the outer injection holes 242 and 243 are different, the pressure pulsation of the gas fuel during the injection of the gas fuel is compared. Change significantly. Thereby, the fuel injection valve 8 can change the pressure pulsation according to the combustion state in the combustion chamber 110 of the engine 11.

(Ninth embodiment)
Next, the valve device according to the ninth embodiment will be described with reference to FIG. The ninth embodiment is different from the first embodiment in the system to which the valve device is applied.

  The valve device 9 according to the ninth embodiment will be described with reference to FIG. The valve device 9 is applied to a fuel cell system 90 shown in FIG.

  The fuel cell system 90 includes a fuel cell 91, a fuel gas circulation system 92, an oxidant gas circulation system 93, and the like. The fuel cell system 90 generates electrical energy using an electrochemical reaction between hydrogen as a fuel gas and oxygen as an oxidant gas.

  The fuel cell 91 is, for example, a solid polymer electrolyte fuel cell, and includes a plurality of cells, electrodes provided at both ends in the stacking direction of the plurality of stacked cells, a hydrogen supply pipe, an air supply pipe, and the like. Have

  The cell includes an electrolyte membrane, an MEA having electrodes provided on both sides of the electrolyte membrane, and a pair of separators that sandwich the MEA. The cell is formed to be able to flow while isolating hydrogen and air. The cell can generate a potential difference, that is, electric energy between the anode and the cathode of the pair of separators by a reaction between hydrogen supplied from the hydrogen supply pipe and oxygen contained in air supplied from the air supply pipe. .

  The fuel gas distribution system 92 includes a hydrogen tank 921, a hydrogen pipe 922, a regulator 923, and the like. The hydrogen tank 921 can store hydrogen supplied to the fuel cell 91 at a high pressure. The hydrogen pipe 922 connects the hydrogen tank 921 and the hydrogen supply pipe of the fuel cell 91. The hydrogen pipe 922 has a flow path through which hydrogen flows. The regulator 923 is provided in the hydrogen pipe 922. The regulator 923 can adjust the pressure of hydrogen flowing through the hydrogen pipe 922.

  The valve device 9 is provided between the regulator 923 of the hydrogen pipe 922 and the fuel cell 91. The valve device 9 can adjust the supply amount of hydrogen supplied to the fuel cell 91.

  The oxidant gas flow system 93 is a pipe through which air can flow, and connects the atmosphere and the air supply pipe of the fuel cell 91. The oxidant gas flow system 93 can supply air to the fuel cell 91.

  In the valve device 9 according to the ninth embodiment, the supply amount of hydrogen flowing through the hydrogen pipe 922 is adjusted. At this time, the valve device 9 can cover the supply amount of hydrogen required by the fuel cell 91 over a wide range by controlling the opening and closing of the inner injection hole 241 and the outer injection holes 242 and 243. Therefore, the ninth embodiment can achieve the effects (a) to (d), (f), and (g) of the first embodiment.

  Further, in the valve device 9 according to the ninth embodiment, a relatively large pressure pulsation can be generated in the hydrogen flow by controlling the current value and the pulse width of energization of the coil 45 by the control unit 50. Thereby, the water generated in the electrochemical reaction between hydrogen and oxygen in the fuel cell 91 can be discharged from the fuel cell 91 by the pressure pulsation. Thereby, the output fall of the fuel cell 91 can be prevented.

(Other embodiments)
In the first to eighth embodiments, the “valve device” is a fuel injection valve that injects gaseous fuel. In the ninth embodiment, the valve device injects hydrogen gas. However, the “fluid” may not be a gas fuel. It may be liquid fuel or other fluid.

  In the above-described embodiment, the magnetic diaphragm portion where the magnetic flux density is saturated is provided in the fixed core. However, it may be provided on the valve opening direction side of the inner movable core.

  In the above-described embodiment, the area of the magnetic throttle portion facing the inner movable core is smaller than the area of the fixed core facing the outer movable core, and the distance between the inner movable core and the end face on the valve closing direction side of the magnetic throttle portion. Is shorter than the distance between the outer movable core and the end face of the stationary core on the valve closing direction side. However, the relationship between the area and the distance is not limited to this. The area of the magnetic throttle part facing the inner movable core may be only smaller than the area of the fixed core facing the outer movable core, or the area between the inner movable core and the end face on the valve closing direction side of the magnetic throttle part. The distance may be only shorter than the distance between the outer movable core and the end face on the valve closing direction side of the fixed core.

  In the above-described embodiment, the control unit controls the magnitude of the current so that the injection of only the inner injection hole, the continuous injection of the inner injection hole and the outer injection hole, and the injection from the inner injection hole are continued. In this state, the intermittent injection from the outer nozzle hole and the state in which only the injection from the outer nozzle hole is continued are properly used. However, the continuous injection of the inner nozzle hole and the outer nozzle hole may be performed simply by passing an electric current through the coil.

  The control shown in FIG. 29 of the eighth embodiment may be applied to the fuel cell system of the ninth embodiment. In this case, since the water accumulated in the fuel cell can be removed by the change in the pressure of hydrogen, it is possible to prevent the performance degradation due to the water in the fuel cell system.

  In the above-described embodiment, the fuel injection valve has an inner injection hole located on the central axis and an outer injection hole formed in a direction away from the central axis when viewed from the inner injection hole. However, the arrangement of the nozzle holes is not limited to this. The opening and closing may be controlled by independent movement of the plurality of valve members with respect to the plurality of nozzle holes. Further, the movement of the plurality of valve members may not be coaxial.

  In the above-described embodiment, the inner nozzle hole is formed so that the cross-sectional area is smaller than the total cross-sectional area of the outer nozzle hole. However, the relationship between the cross-sectional areas of the nozzle holes is not limited to this.

  In the sixth embodiment, the sliding member is provided on the outer movable core. However, the member provided with the sliding member is not limited to this. You may provide in the outer valve member formed from a magnetic material.

  In the above-described embodiment, the seal portion of the valve member is made of rubber. You may form from resin.

  In the above-described embodiment, the control unit controls the magnitude of the current supplied to the coil. However, the voltage applied to the coil may be controlled.

  In the above-described embodiment, the soft nitriding treatment is performed on the radially inner side surface of the outer movable core and the radially outer side surface of the inner movable core. In this treatment, DLC may be coated or a fluororesin may be coated.

  As mentioned above, this invention is not limited to such embodiment, It can implement with a various form in the range which does not deviate from the summary.

1, 2, 3, 4, 5, 6, 7, 8 ... Fuel injection valve (valve device)
9 ... Valve device 25, 26, 28 ... Inner valve member (first valve member)
35, 36, 38 ... outer valve member (second valve member)
40 ... fixed core 41, 81 ... magnetic diaphragm 45 ... coil 50, 60, 70 ... control part 55, 56 ... inner movable core (first movable core)
65, 66 ... outer movable core (second movable core)

Claims (15)

A housing (20) having a plurality of through holes (241, 242, 243) through which fluid can flow;
A first valve member (25, 26, 28) provided so as to be movable relative to the housing and capable of opening and closing at least one first through hole (241) of the plurality of through holes;
A second valve member (35, 36, 38) provided so as to be movable relative to the housing and capable of opening and closing second through holes (242, 243) excluding the first through holes of the plurality of through holes; ,
A fixed core (40) provided so as not to move relative to the housing;
A coil (45) that forms a magnetic field by energization;
A control unit (50, 60, 70) for controlling energization of the coil;
A first movable core (55, 56) provided so as to be movable integrally with the first valve member, and generating a magnetic attraction force with the fixed core when the coil forms a magnetic field;
A second movable core (65, 66) provided so as to be movable integrally with the second valve member and generating a magnetic attractive force between the coil and the fixed core when the coil forms a magnetic field;
A magnetic diaphragm (41, 81) provided between the fixed core and the first movable core;
With
A valve device capable of opening the second through hole after opening the first through hole. The magnetic diaphragm portion is provided on the fixed core so as not to be relatively movable,
In the magnetic diaphragm portion, the area of the end face (411) facing the first movable core is smaller than the area of the end face (401) of the fixed core facing the second movable core, or the first movable core The distance (L11) between the fixed core and the fixed core is shorter than the distance (L12) between the end face of the fixed core facing the second movable core and the fixed core. The valve device according to claim 1.   The valve device according to claim 1 or 2, further comprising a nonmagnetic portion (42) provided between the fixed core and the first movable core. The second through hole is provided around the first through hole,
The valve device according to any one of claims 1 to 3, wherein the second valve member is a cylindrical member provided in a radially outward direction of the first valve member.   The valve device according to any one of claims 1 to 4, wherein the first valve member and the second valve member are formed so as to be movable on the same axis.   The valve device according to any one of claims 1 to 5, wherein a cross-sectional area of the first through hole is smaller than a cross-sectional area of the second through hole.   The second valve member is provided between the first valve member and the second valve member, and when the first valve member opens the first through hole, the second valve member is in a direction opposite to the second through hole. The valve device according to any one of claims 1 to 6, further comprising a biasing member (73) that biases the spring.   An elastic member (27, 37) that is provided on either the first valve member or the second valve member and is engageable with either the first valve member or the second valve member. Item 7. The valve device according to any one of Items 1 to 6. A nonmagnetic part (42) provided between the fixed core and the first movable core;
The first valve member has an end on the through hole side that slides on the through hole forming portion (24) of the housing that forms the through hole, and an end on the side opposite to the through hole is the nonmagnetic member. Sliding on the part
The valve device according to any one of claims 1 to 8, wherein the first valve member and the through hole forming portion are formed of a nonmagnetic material. The second valve member and the second movable core are located in a radially outward direction of the first valve member,
The first valve member is formed of a nonmagnetic material and is provided on the radially inner side of the second valve member and a member formed of the magnetic material of the second movable core, and slides on the first valve member formed of a nonmagnetic material. A movable sliding member (67);
The valve device according to claim 9, wherein the second valve member and the second movable core are guided relative to the housing only by the first valve member.   The distance (L61, L62) between the radially outer side surface (381, 661) of the second valve member or the second movable core and the inner wall surface (211) of the housing facing the side surface is the sliding member. The valve device according to claim 10, wherein the valve device is larger than a distance (L60) between a radially inner side surface (671) and a radially outer side surface (284) of the first valve member facing the side surface of the sliding member. .   The said control part controls the electricity supply to the said coil so that the said 2nd through-hole may be opened intermittently in the state which has opened the said 1st through-hole continuously. Valve device.   The control unit controls energization to the coil so as to close the first through hole with the second through hole opened after the first through hole is opened and then the second through hole is opened. Item 13. The valve device according to any one of Items 1 to 12.   The control unit controls energization to the coil so as to close the second through hole after closing the first through hole after opening the second through hole after opening the first through hole. Item 14. The valve device according to Item 13.   The control unit opens the first through hole, then opens the second through hole, then closes the first through hole, and then closes the second through hole, and the first through hole and the second through hole. The valve device according to claim 14, wherein energization of the coil is controlled to repeatedly open and close the coil.

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