WO2023008132A1 - ソレノイド装置及び燃料噴射装置の電磁弁 - Google Patents
ソレノイド装置及び燃料噴射装置の電磁弁 Download PDFInfo
- Publication number
- WO2023008132A1 WO2023008132A1 PCT/JP2022/026991 JP2022026991W WO2023008132A1 WO 2023008132 A1 WO2023008132 A1 WO 2023008132A1 JP 2022026991 W JP2022026991 W JP 2022026991W WO 2023008132 A1 WO2023008132 A1 WO 2023008132A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- core
- axial direction
- casing
- solenoid
- valve
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 110
- 238000002347 injection Methods 0.000 title claims abstract description 62
- 239000007924 injection Substances 0.000 title claims abstract description 62
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 239000000696 magnetic material Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/002—Arrangement of leakage or drain conduits in or from injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/02—Fuel-injection apparatus having means for reducing wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
Definitions
- the present disclosure relates to a solenoid device and a solenoid valve of a fuel injection device.
- a common rail fuel injection device applied to a diesel engine or the like includes a fuel pump, a common rail, and a fuel injection valve.
- the fuel pump sucks fuel from the fuel tank, pressurizes it, and supplies it to the common rail as high-pressure fuel.
- the common rail maintains high pressure fuel supplied from the fuel pump at a predetermined pressure.
- the fuel injection valve injects high-pressure fuel on the common rail into the combustion chamber of the diesel engine by opening and closing the injection valve.
- a fuel injection valve has an electromagnetic valve that includes a solenoid device that generates an electromagnetic force by, for example, applying current to a coil wound around a core, and a valve unit that is formed using a magnetic material.
- a solenoid valve for example, an elastic force is applied to the valve unit to hold down the fuel flow path. state. Further, when the electromagnetic force is generated by the solenoid device, the valve unit is drawn toward the solenoid device by the electromagnetic force, and the valve unit is separated from the flow channel to open the flow channel.
- valve unit When the valve unit is attracted to the solenoid device, it does not come into contact with the electromagnetic force generating surface of the solenoid device, so that a small gap is secured.
- a configuration that serves as a stopper is known (see, for example, Patent Document 1, etc.).
- the present disclosure has been made in view of the above, and aims to provide a solenoid device and a solenoid valve for a fuel injection device having a stopper structure with excellent impact resistance.
- a solenoid device is a solenoid device that drives a valve unit of an electromagnetic valve provided in a fuel injection device by electromagnetic force, and includes a cylindrical core, a coil wound around the core, the core and the a casing that houses a coil and covers at least one end in the axial direction of the central axis of the core; and terminals that are arranged between the core and the casing in the axial direction and are connected to the coil.
- a terminal fixing member disposed on the inner peripheral side of the core so as to penetrate the core and the casing in the axial direction, and protruding in a radial direction perpendicular to the axial direction between the casing and the terminal fixing member; a cylindrical member having projecting portions held from both sides in the axial direction, and having an end on the other side in the axial direction disposed at a position capable of coming into contact with the valve unit.
- the solenoid valve of the fuel injection device is formed using the above-described solenoid device and a magnetic body, is arranged to face the other end of the core in the axial direction,
- the solenoid device does not generate an electromagnetic force
- the elastic force presses the fuel flow path to a closed state
- the solenoid device generates an electromagnetic force a valve unit that is attracted by the core to a position where it contacts the cylindrical member by the electromagnetic force and moves away from the flow path to open the flow path.
- FIG. 1 is a schematic configuration diagram showing an example of the fuel injection device of this embodiment.
- FIG. 2 is a vertical cross-sectional view showing an example of a fuel injection valve.
- FIG. 3 is a vertical cross-sectional view showing an example of an electromagnetic valve.
- FIG. 4 is a vertical cross-sectional view showing an example of a tubular member.
- FIG. 5 is a diagram showing the configuration along the AA cross section in FIG.
- FIG. 6 is a longitudinal sectional view showing an example of the operation of the solenoid valve.
- FIG. 1 is a schematic configuration diagram showing an example of the fuel injection device 10 of this embodiment.
- the fuel injection device 10 is mounted on a diesel engine (internal combustion engine).
- the fuel injection device 10 includes a fuel pump 11 , a common rail 12 and a plurality of fuel injection valves 13 .
- the fuel pump 11 is connected to the fuel tank 14 via a fuel line L11.
- the fuel pump 11 sucks the fuel stored in the fuel tank 14 from the fuel line L11 and pressurizes it to generate high pressure fuel.
- the fuel pump 11 is connected to a common rail 12 via a fuel high pressure line L12.
- the common rail 12 keeps the high pressure fuel supplied from the fuel pump 11 at a predetermined pressure.
- the common rail 12 is connected to the fuel injection valves 13 via a plurality of (four in this embodiment) fuel supply lines L13.
- the fuel injection valve 13 injects high-pressure fuel on the common rail 12 into each cylinder (combustion chamber) of the diesel engine by opening and closing an electromagnetic valve.
- FIG. 2 is a longitudinal sectional view showing an example of the fuel injection valve 13.
- the fuel injection valve 13 has a shape extending in the axial direction of the central axis AX, and has an injection portion 20 and an electromagnetic valve 40 .
- the side of the fuel injection port 30 in the axial direction of the central axis AX is referred to as the front end side
- the side of the solenoid valve 40 is referred to as the base end side.
- the injection part 20 has a casing 21 and a piston valve 22 .
- the casing 21 includes a fuel inlet 24, an injection-side flow path 25, a control-side flow path 26, an injection-side pressure chamber 27, a control-side pressure chamber 28, a cylinder chamber 29, a fuel injection port 30, a fuel It has a discharge port 31 and an electromagnetic valve side pressure chamber 32 .
- the injection-side flow path 25 connects the fuel inlet 24 and the injection-side pressure chamber 27 .
- the control-side flow path 26 connects the fuel inlet 24 and the control-side pressure chamber 28 .
- the injection side pressure chamber 27 is connected to the fuel injection port 30 .
- the fuel injection port 30 is arranged at the tip end of the casing 21 and ejects fuel toward each cylinder of the diesel engine.
- the control-side pressure chamber 28 is connected to the fuel outlet 31.
- the fuel discharge port 31 is arranged at the proximal end of the casing 21 and connected to the electromagnetic valve side pressure chamber 32 .
- the electromagnetic valve side pressure chamber 32 is connected to the electromagnetic valve 40 (a space portion 46d described later).
- the cylinder chamber 29 is connected to the injection side pressure chamber 27 and the control side pressure chamber 28 .
- Cylinder chamber 29 accommodates piston valve 22 .
- the cylinder chamber 29 is connected to the electromagnetic valve side pressure chamber 32 via a flow path 29a.
- the piston valve 22 is accommodated in the cylinder chamber 29 and provided movably toward the injection side pressure chamber 27 side or the control side pressure chamber 28 side.
- the piston valve 22 has a spring seat member 22a, a control-side piston member 22b, a connecting member 22c, and a valve body 22d. Note that the spring seat member 22a, the control-side piston member 22b, and the connecting member 22c are integral.
- the spring seat member 22a receives elastic force of an elastic member 23, which will be described later.
- the control-side piston member 22b receives the pressure of the control-side pressure chamber 28. As shown in FIG.
- the connecting member 22c connects the spring seat member 22a and the control-side piston member 22b.
- the valve body 22d protrudes from the spring seat member 22a toward the distal end side in the axial direction of the central axis AX.
- the valve body 22d abuts on the spring seat member 22a by the resultant force of the pressure received from each pressure chamber and the elastic force.
- the valve body 22 d is formed in a shape such that the tip thereof can close the fuel injection port 30 . 22 d of valve bodies receive the pressure of the injection side pressure chamber 27. As shown in FIG.
- the solenoid valve 40 has a solenoid device 41 and a valve unit 42 .
- FIG. 3 is a longitudinal sectional view showing an example of the solenoid valve 40. As shown in FIG. FIG. 3 shows an enlarged part of FIG. As shown in FIG. 3, the solenoid device 41 drives the valve unit 42 along the axial direction of the central axis AX by electromagnetic force.
- the solenoid device 41 has a core 43 , a coil 44 , a casing 45 , a tubular member 46 and a terminal fixing member 47 .
- the core 43 has a tubular portion 43a, a flange portion 43b, and a side portion 43c.
- the tubular portion 43a is formed, for example, in a cylindrical shape.
- the flange portion 43 b is, for example, disk-shaped and is arranged on the proximal end side of the core 43 .
- the cylindrical portion 43 a and the flange portion 43 b are arranged such that their central axes coincide with the central axis AX of the fuel injection valve 13 .
- the side surface portion 43c has a cylindrical shape that encloses the cylindrical portion 43a.
- the side surface portion 43c is radially spaced apart from the tubular portion 43a and extends toward the distal end side.
- the tubular portion 43a, the flange portion 43b, and the side portion 43c are formed using a magnetic material.
- the core 43 accommodates the coil 44 in a space surrounded by the tubular portion 43a, the flange portion 43b and the side portion 43c.
- a space in the core 43 where the coil 44 is arranged is sealed by a sealing portion 49 .
- the sealing portion 49 is formed using, for example, a resin material.
- the terminal fixing member 47 is arranged between the core 43 and a casing 45 described later in the axial direction of the central axis AX, and fixes a terminal 44 a connected to the coil 44 .
- the terminal 44a penetrates the casing 45 and is pulled out to the outside.
- the terminal fixing member 47 is formed using a resin material or the like, for example.
- the coil 44 is wound around the cylindrical portion 43a.
- the coil 44 is connected to a power source (not shown) through a casing 45, which will be described later.
- the solenoid device 41 generates electromagnetic force by applying current to the coil 44 .
- the casing 45 accommodates the core 43 and the coil 44.
- the casing 45 has a core accommodating portion 45a and a holding portion 45b.
- the core accommodating portion 45a and the holding portion 45b are integrally formed using a non-magnetic material.
- the core housing portion 45 a houses the core 43 including the coil 44 .
- the core accommodating portion 45a is arranged so as to cover the flange portion 43b and the side surface portion 43c of the core 43 .
- the holding portion 45b is arranged on the proximal end side of the core accommodating portion 45a.
- the holding portion 45 b holds the cylindrical member 46 .
- the holding portion 45b is provided with a stepped portion 45d corresponding to a later-described projecting portion 46a of the cylindrical member 46. As shown in FIG. The shape and dimensions of the stepped portion 45d are set so that the projecting portion 46a is held in contact with the entire holding portion 45b.
- the cylindrical member 46 is accommodated in the holding portion 45b, and the terminal fixing member 47 and the core 43 are accommodated in the core accommodating portion 45a.
- FIG. 4 is a longitudinal sectional view showing an example of the tubular member 46. As shown in FIG. FIG. 4 extracts and shows the cylindrical member 46 from the electromagnetic valve 40 shown in FIG. As shown in FIGS. 3 and 4 , the cylindrical member 46 is, for example, cylindrical and arranged such that its central axis coincides with the central axis AX of the fuel injection valve 13 .
- the tubular member 46 has a projecting portion 46a.
- the protruding portion 46a protrudes from the outer peripheral surface of the tubular member 46 in a radial direction orthogonal to the axial direction of the central axis AX.
- the projecting portion 46a is held by the holding portion 45b of the casing 45 and the terminal fixing member 47 from both sides in the axial direction of the central axis AX. That is, the protruding portion 46 a is held by the stepped portion 45 d at the base end side and the side face in the axial direction of the central axis AX, and is held by the terminal fixing member 47 at the tip end side. This configuration restricts the axial movement of the central axis AX of the cylindrical member 46 .
- the tubular member 46 and the inner circumference of the core 43 can be prevented from sliding relative to each other in the axial direction of the central axis AX, and wear of the core 43 can be suppressed. In addition, it is possible to suppress the intrusion of fuel into the worn portion of the core 43 .
- the cylindrical member 46 is arranged at a position where the end surface 46b on the tip end side can come into contact with the valve unit 42 .
- the end surface 46b is flush with the tip end surface of the side surface portion 43c of the core 43 and the tip end surface of the sealing portion 49, for example.
- the cylindrical member 46 may be arranged at a position where the end surface 46 b protrudes toward the distal end side with respect to the distal end surface of the side surface portion 43 c and the distal end surface of the sealing portion 49 .
- the tubular member 46 has a support portion 46d on its inner periphery.
- the support portion 46 d is formed in a stepped shape in a cross-sectional view so as to reduce the diameter of the cylindrical member 46 .
- the tubular member 46 accommodates the elastic member 48 in a space portion 46e between the end surface 46b and the support portion 46d.
- the elastic member 48 is accommodated in the space portion 46e with its proximal end supported by the support portion 46d.
- the elastic member 48 applies an elastic force to the valve unit 42 toward the distal end in the axial direction of the central axis AX.
- the tubular member 46 has a connecting portion 46c.
- the connection portion 46 c is provided to protrude from the holding portion 45 b of the casing 45 toward the proximal end side.
- the connecting portion 46c is connected to an external fuel discharge channel 50 .
- the connection portion 46c has a space portion 46f on the inner peripheral side.
- the space portion 46f is connected to the space portion 46e via a connection channel 46g. Therefore, the inner side of the cylindrical member 46 communicates from the distal side to the proximal side.
- the cylindrical member 46 is connected to the electromagnetic valve side pressure chamber 32 at the space 46e. Therefore, the tubular member 46 functions as a joint that connects the solenoid valve side pressure chamber 32 and the external fuel discharge flow path 50 .
- FIG. 5 is a diagram showing the configuration along the AA cross section in FIG.
- the projecting portion 46a has an engaging portion 46h that engages the casing 45 in the direction around the central axis AX.
- the engaging portion 46h has, for example, a shape in which a part of the circular arc of the protruding portion 46a is linearly cut away when viewed from the axial direction of the central axis AX.
- the casing 45 (the core side portion 45a and the holding portion 45b) has an opening provided with a linear portion corresponding to the locking portion 46h when viewed from the axial direction of the central axis AX.
- the valve unit 42 moves in the axial direction of the central axis AX due to the electromagnetic force generated by the solenoid device 41 .
- the valve unit 42 has an armature 42a, a valve body 42b, and a step portion 42c.
- the armature 42a is formed using a magnetic material.
- the armature 42a is, for example, disk-shaped.
- the armature 42 a is arranged so as to face the tip end of the core 43 of the solenoid device 41 .
- the valve body 42b extends from the armature 42a toward the distal end side.
- the valve body 42 b is formed into a shape that allows the fuel discharge port 31 to be closed at its tip.
- the stepped portion 42c is formed in a state where the central portion of the armature 42a protrudes toward the solenoid device 41 side.
- the stepped portion 42c is shaped and dimensioned to contact the end surface 46b of the tubular member 46 when the valve unit 42 is pulled toward the solenoid device 41 side. Further, the step portion 42 c receives elastic force from the elastic member 48 .
- the elastic force of the elastic member 48 is transmitted to the armature 42a and the valve body 42b via the stepped portion 42c.
- the elastic force of the elastic member 48 is applied to the armature 42a and the valve body 42b toward the distal end side in the axial direction of the central axis AX. Note that the step portion 42c may not be provided.
- FIG. 6 is a longitudinal sectional view showing an example of the operation of the solenoid valve 40. As shown in FIG. FIG. 6 shows an example in which a current is passed through the coil 44 . As shown in FIG. 6 , when an electromagnetic force is generated in the solenoid device 41 , the armature 42 a of the valve unit 42 is pulled toward the core 43 by the electromagnetic force, and the valve body 42 b is separated from the fuel discharge port 31 . As a result, the fuel outlet 31 is opened.
- the pressure in the control-side pressure chamber 28 decreases.
- the piston valve 22 moves toward the control-side pressure chamber 28 side.
- the valve body 22d of the piston valve 22 is separated from the fuel injection port 30 and the fuel injection port 30 is opened.
- the fuel injection port 30 is open, the fuel that has flowed from the fuel inlet 24 through the injection-side passage 25 and into the injection-side pressure chamber 27 is injected from the fuel injection port 30 .
- the stepped portion 42c of the valve unit 42 contacts the end surface 46b of the cylindrical member 46, as shown in FIG.
- the cylindrical member 46 functions as a stopper that restricts movement of the valve unit 42 toward the proximal end side.
- the tubular member 46 is held by the casing 45 and the terminal fixing member 47 at the projecting portion 46a from both sides in the axial direction of the central axis AX. Therefore, the casing 45 and the terminal fixing member 47 can receive the impact when the valve unit 42 contacts the cylindrical member 46 . Further, when the valve unit 42 contacts, movement of the cylindrical member 46 in the axial direction of the central axis AX is restricted. Therefore, sliding between the tubular member 46 and the core 43 is suppressed, and abrasion of the inner peripheral surface of the core 43 is suppressed.
- the solenoid device 41 is a solenoid device 41 that drives the valve unit 42 of the solenoid valve 40 provided in the fuel injection device 10 by electromagnetic force.
- 43 a casing 45 that houses the core 43 and the coil 44 and covers at least one end of the core 43 in the axial direction of the central axis AX, and the core 43 and the casing 45 in the axial direction.
- a terminal fixing member 47 is arranged between and fixes a terminal 44a connected to the coil 44, and a terminal fixing member 47 is arranged on the inner peripheral side of the core 43 so as to pass through the core 43 and the casing 45 in the axial direction, and is perpendicular to the axial direction.
- a cylindrical member 46 which protrudes in the radial direction and has a protruding portion 46a which is held from both sides in the axial direction by a casing 45 and a terminal fixing member 47, and whose end surface 46b is disposed at a position where it can come into contact with the valve unit 42; Prepare.
- the cylindrical member 46 is held by the casing 45 and the terminal fixing member 47 at the projecting portion 46a from both sides in the axial direction of the central axis AX.
- This allows the casing 45 and the terminal fixing member 47 to receive the impact when the valve unit 42 contacts the cylindrical member 46 .
- movement of the cylindrical member 46 in the axial direction of the central axis AX is restricted. Therefore, sliding between the tubular member 46 and the core 43 is suppressed, and abrasion of the inner peripheral surface of the core 43 is suppressed. This makes it possible to provide the solenoid device 41 with excellent impact resistance.
- the protruding portion 46a has an engaging portion 46h that engages the casing 45 in the direction around the central axis AX. According to this configuration, the rotation of the cylindrical member 46 in the direction around the central axis AX is suppressed, so that the occurrence of breakage of the solenoid device 41 such as the core 43 can be suppressed more reliably.
- the cylindrical member 46 has a connecting portion 46c connected to the external fuel discharge passage 50 at one end in the axial direction. According to this configuration, since the contact portion with the valve unit 42 and the joint portion with the fuel discharge flow path 50 are provided in the single cylindrical member 46, the number of parts can be reduced.
- the solenoid valve 40 of the fuel injection device 10 is formed using the solenoid device 41 and a magnetic material, and is arranged to face the other end of the core 43 in the axial direction.
- the solenoid device 41 does not generate an electromagnetic force
- the elastic force presses the fuel flow passage to a closed state
- the solenoid device 41 generates an electromagnetic force
- the tubular member 46 has a support portion 46d that supports an elastic member 48 that imparts elastic force to the valve unit 42. As shown in FIG. According to this configuration, the contact portion with the valve unit 42 and the support portion 46d of the elastic member 48 are provided in the cylindrical member 46, which is one member, so that the number of parts can be reduced.
- the technical scope of the present invention is not limited to the above embodiments, and modifications can be made as appropriate without departing from the scope of the present invention.
- the configuration in which the solenoid valve 40 is provided in the fuel injection valve 13 of the fuel injection device 10 has been described as an example, but the present invention is not limited to this.
- the solenoid valve 40 may be provided at another portion of the fuel injection device 10 .
- the form of the fuel injection device 10 and the form of the fuel pump 11 are not limited to the embodiments described above.
- the number of common rails 12 and fuel injection valves 13, the connection position of the fuel pump 11, and the like can be appropriately set.
- Fuel injection device 11 fuel pump 12 common rail 13 fuel injection valve 14 fuel tank 20 injection part 21, 45 casing 22 piston valve 22a spring seat member 22b control side piston member 22c connecting member 22d, 42b valve body 23, 48 elastic member 24 fuel Inlet 25 Injection side flow path 26 Control side flow path 27 Injection side pressure chamber 28 Control side pressure chamber 29 Cylinder chamber 30 Fuel injection port 31 Fuel discharge port 32 Solenoid valve side pressure chamber 40 Solenoid valve 41 Solenoid device 42 Valve unit 42a Armature 42c, 45d Stepped portion 43 Core 43a Cylindrical portion 43b Flange portion 43c Side portion 44 Coil 44a Terminal 45a Core housing portion 45b Holding portion 46b End surface 46 Cylindrical member 46a Projecting portion 46c Connecting portion 46d Supporting portions 46e, 46f Space portion 46g Connection Channel 46h Locking portion 47 Terminal fixing member 49 Sealing portion 50 Fuel discharge channel AX Central axis L11 Fuel line L12 Fuel high pressure line L13 Fuel supply line
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
11 燃料ポンプ
12 コモンレール
13 燃料噴射弁
14 燃料タンク
20 噴射部
21,45 ケーシング
22 ピストン弁
22a ばね座部材
22b 制御側ピストン部材
22c 連結部材
22d,42b 弁体
23,48 弾性部材
24 燃料流入口
25 噴射側流路
26 制御側流路
27 噴射側圧力室
28 制御側圧力室
29 シリンダ室
30 燃料噴射口
31 燃料排出口
32 電磁弁側圧力室
40 電磁弁
41 ソレノイド装置
42 バルブユニット
42a アーマチャ
42c,45d 段部
43 コア
43a 筒状部
43b フランジ部
43c 側面部
44 コイル
44a 端子
45a コア収容部
45b 保持部
46b 端面
46 筒状部材
46a 突出部
46c 接続部
46d 支持部
46e,46f 空間部
46g 接続流路
46h 係止部
47 端子固定部材
49 封止部
50 燃料排出流路
AX 中心軸
L11 燃料ライン
L12 燃料高圧ライン
L13 燃料供給ライン
Claims (5)
- 燃料噴射装置に設けられる電磁弁のバルブユニットを電磁力により駆動するソレノイド装置であって、
筒状のコアと、
前記コアに巻かれたコイルと、
前記コア及び前記コイルを収容し、少なくとも前記コアの中心軸の軸線方向の一方側の端部を覆うケーシングと、
前記軸線方向について前記コアと前記ケーシングとの間に配置され、前記コイルに接続される端子を固定する端子固定部材と、
前記軸線方向に前記コアと前記ケーシングとを貫通するように前記コアの内周側に配置され、前記軸線方向に直交する径方向に突出し前記ケーシングと前記端子固定部材とで前記軸線方向の両側から保持される突出部を有し、前記軸線方向の他方側の端部が前記バルブユニットに接触可能な位置に配置される筒状部材と
を備えるソレノイド装置。 - 前記突出部は、前記ケーシングに対して前記中心軸の軸回り方向に係止する係止部を有する
請求項1に記載のソレノイド装置。 - 前記筒状部材は、前記軸線方向の一方側の端部に、外部の燃料排出流路に接続される接続部を有する
請求項1又は請求項2に記載のソレノイド装置。 - 請求項1から請求項3のいずれか一項に記載のソレノイド装置と、
磁性体を用いて形成され、前記コアの前記軸線方向の他方側の端部に対向して配置され、前記コアから前記軸線方向に離れる方向に弾性力が付与され、前記ソレノイド装置で電磁力が生じない場合には前記弾性力により燃料の流通路を押さえて閉じた状態とし、前記ソレノイド装置で電磁力が生じる場合には当該電磁力により前記筒状部材に接触する位置まで前記コアに引き寄せられて前記流通路から離れることで前記流通路を開くバルブユニットと
を備える燃料噴射装置の電磁弁。 - 前記筒状部材は、前記バルブユニットに前記弾性力を付与する弾性部材を支持する支持部を有する
請求項4に記載の燃料噴射装置の電磁弁。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP22849197.3A EP4343189A1 (en) | 2021-07-27 | 2022-07-07 | Solenoid device and solenoid valve of fuel injection device |
KR1020237043432A KR20240009998A (ko) | 2021-07-27 | 2022-07-07 | 솔레노이드 장치 및 연료 분사 장치의 전자 밸브 |
CN202280045314.6A CN117616193A (zh) | 2021-07-27 | 2022-07-07 | 螺线管装置以及燃料喷射装置的电磁阀 |
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JP2021-122275 | 2021-07-27 | ||
JP2021122275A JP2023018273A (ja) | 2021-07-27 | 2021-07-27 | ソレノイド装置及び燃料噴射装置の電磁弁 |
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WO2023008132A1 true WO2023008132A1 (ja) | 2023-02-02 |
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PCT/JP2022/026991 WO2023008132A1 (ja) | 2021-07-27 | 2022-07-07 | ソレノイド装置及び燃料噴射装置の電磁弁 |
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EP (1) | EP4343189A1 (ja) |
JP (1) | JP2023018273A (ja) |
KR (1) | KR20240009998A (ja) |
CN (1) | CN117616193A (ja) |
WO (1) | WO2023008132A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006194237A (ja) | 2004-12-14 | 2006-07-27 | Denso Corp | 電磁式アクチュエータ |
JP2008144663A (ja) * | 2006-12-08 | 2008-06-26 | Denso Corp | インジェクタ |
JP2010140998A (ja) * | 2008-12-10 | 2010-06-24 | Denso Corp | 電磁駆動装置およびその製造方法 |
-
2021
- 2021-07-27 JP JP2021122275A patent/JP2023018273A/ja active Pending
-
2022
- 2022-07-07 CN CN202280045314.6A patent/CN117616193A/zh active Pending
- 2022-07-07 KR KR1020237043432A patent/KR20240009998A/ko unknown
- 2022-07-07 WO PCT/JP2022/026991 patent/WO2023008132A1/ja active Application Filing
- 2022-07-07 EP EP22849197.3A patent/EP4343189A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006194237A (ja) | 2004-12-14 | 2006-07-27 | Denso Corp | 電磁式アクチュエータ |
JP2008144663A (ja) * | 2006-12-08 | 2008-06-26 | Denso Corp | インジェクタ |
JP2010140998A (ja) * | 2008-12-10 | 2010-06-24 | Denso Corp | 電磁駆動装置およびその製造方法 |
Also Published As
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CN117616193A (zh) | 2024-02-27 |
EP4343189A1 (en) | 2024-03-27 |
KR20240009998A (ko) | 2024-01-23 |
JP2023018273A (ja) | 2023-02-08 |
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