WO2021090388A1 - 燃料噴射弁 - Google Patents

燃料噴射弁 Download PDF

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Publication number
WO2021090388A1
WO2021090388A1 PCT/JP2019/043413 JP2019043413W WO2021090388A1 WO 2021090388 A1 WO2021090388 A1 WO 2021090388A1 JP 2019043413 W JP2019043413 W JP 2019043413W WO 2021090388 A1 WO2021090388 A1 WO 2021090388A1
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WO
WIPO (PCT)
Prior art keywords
hole
pipe
fuel injection
valve
slit
Prior art date
Application number
PCT/JP2019/043413
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
太樹 長村
範久 福冨
宗実　毅
学 平井
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN201980101637.0A priority Critical patent/CN114616389A/zh
Priority to PCT/JP2019/043413 priority patent/WO2021090388A1/ja
Priority to JP2021554456A priority patent/JPWO2021090388A1/ja
Publication of WO2021090388A1 publication Critical patent/WO2021090388A1/ja

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type

Definitions

  • This application relates to a fuel injection valve.
  • Patent Document 1 a needle (patented) formed by a mover and a valve closure, and a connecting member for connecting the mover and the valve closure, a so-called pipe, and movable in the axial direction
  • a fuel injection valve provided with a valve needle is well known.
  • the fuel injection valve disclosed in Patent Document 1 is provided with a vertically long slit in the pipe, and the slit is formed so that the opening width of the end portion on the valve closing body side is narrower than the opening width of the central portion.
  • the mover and the pipe, and the valve closing body and the connecting member are connected by welding seams, respectively.
  • the fuel injection valve has a structure in which the needle is repeatedly moved up and down in the axial direction by repeating energization and de-energization, and the valve portion is opened and closed to inject fuel.
  • the range of the axial movement of the needle is limited by the core on the upstream side of the fuel flow path and by the valve seat provided on the downstream side on the downstream side. When the needle abuts on the core or valve seat, an impact is applied to the abutting portion.
  • the tubular pipe is provided with a vertically long slit, but only one vertically long slit is provided, and therefore, when the needle abuts on the core and the valve seat.
  • the pipe bends and deforms.
  • the bending stress becomes maximum at the middle part and is displaced outward in the radial direction, and the pipe as a whole becomes barrel-shaped, but the slit is not constrained in the circumferential direction and the displacement outward in the radial direction is maximum. Therefore, the amount of compression is also maximized, and the needle bends toward the slit.
  • the needle is guided by two sliding parts on the top and bottom to perform reciprocating movement, but the clearance of the sliding part is small, and if the above bending occurs when opening and closing the valve part, the outer peripheral part of the needle and the mating side slide It interferes with the moving parts, causing great wear on both sides. This wear causes, for example, a change in the injection amount due to long-term use of the mounted engine, which causes an engine malfunction.
  • the present application discloses a technique for solving the above-mentioned problems, and provides a fuel injection valve that suppresses bending of a needle that occurs when opening and closing a valve portion and reduces wear of a sliding portion. The purpose.
  • the fuel injection valve disclosed in the present application is provided on a solenoid device that generates magnetic attraction, a core made of a tubular magnetic material that is at least partially surrounded by the solenoid device, and an inner peripheral portion of the core.
  • a spring a tubular holder provided at the lower end of the core, an amateur placed inside the holder and made of a magnetic material, a pipe coupled to the amateur, and a valve portion coupled to the pipe.
  • a needle having a structure and a valve seat that comes into contact with the valve portion are provided. The needle is guided by the sliding portion of the amateur and the sliding portion of the valve portion and moves in the axial direction of the pipe.
  • the pipe is characterized by having a slit extending over the entire axial length from the upper end portion to the lower end portion in the axial direction, and a through hole facing the slit and extending in the axial direction.
  • the fuel injection valve disclosed in the present application it is possible to obtain a fuel injection valve that suppresses bending of the needle that occurs when the valve portion is opened and closed and reduces wear of the sliding portion.
  • FIG. It is an enlarged view of the part A of the fuel injection valve of FIG. It is a figure which shows the state before rolling processing of the pipe which constitutes the fuel injection valve shown in FIG.
  • FIG. 3 is a cross-sectional view of the rolled pipe as viewed from the direction of line BB in FIG. It is a figure which shows the state before rolling processing of the pipe which constitutes the fuel injection valve which concerns on Embodiment 2.
  • FIG. It is a figure which shows the state before rolling processing of the pipe which constitutes the fuel injection valve which concerns on Embodiment 3.
  • FIG. It is a figure which showed the state of bending deformation of the pipe at the time of opening of the fuel injection valve which concerns on Embodiment 3.
  • FIG. It is a figure which shows the state before rolling processing of the pipe which constitutes the fuel injection valve which concerns on Embodiment 4.
  • FIG. It is a figure which shows the state before rolling processing of the pipe which constitutes the fuel injection valve which concerns on Embodiment 5.
  • FIG. 1 is a view showing a cross section of the fuel injection valve according to the first embodiment
  • FIG. 2 is an enlarged view of part A of FIG.
  • the fuel injection valve 100 supplies fuel to an internal combustion engine used as, for example, an automobile engine.
  • the fuel injection valve 100 includes a solenoid device 2 to which an electric current is supplied from the drive circuit 1 to generate a magnetic attraction force, a core 3 made of a tubular magnetic material at least partially surrounded by the solenoid device 2, and an inner circumference of the core 3.
  • a tubular holder 5 provided at the lower end of the spring 4 provided in the portion and the core 3 and having an end inserted between the lower end of the inner peripheral portion of the solenoid device 2 and the lower end of the outer peripheral portion of the core 3.
  • a needle 6 provided inside the holder 5, a valve seat 7, and a plate 8 coupled to the valve seat 7 are provided.
  • the needle 6 is formed by an amateur 61 made of a magnetic material, a pipe 62 coupled to the amateur 61, and a valve portion 63 coupled to the pipe 62. That is, the pipe 62 is a connecting member between the amateur 61 and the valve portion 63, and the valve portion 63 is in contact with the valve seat 7.
  • the amateur 61 and the pipe 62 are joined by, for example, welding after the pipe 62 is press-fitted into the amateur 61, and the valve portion 63 is, for example, welded to the pipe 62. Further, the core 3 is press-fitted into the holder 5 and then welded to the holder 5, for example.
  • the valve seat 7 is coupled to a plate 8 located on the downstream side of the valve seat 7, that is, on the downstream side of the fuel flow path, and the plate 8 and the holder 5 are welded, for example. With the above configuration, the valve seat 7 is fixed to the holder 5.
  • the drive circuit 1 energizes the solenoid device 2 and a magnetic field is generated in the solenoid device 2, an electromagnetic force acts on the amateur 61 to attract the needle 6 to the core 3 side.
  • the needle 6 is guided by the sliding portion 61a of the amateur 61 and the sliding portion 63a of the valve portion 63 and moves in the axial direction.
  • the outer peripheral portion of the amateur 61 facing the inner peripheral portion 5a of the holder 5 is the sliding portion 61a of the amateur 61.
  • the outer peripheral portion of the valve portion 63 facing the inner peripheral portion 7a of the valve seat 7 is the sliding portion 63a of the valve portion 63.
  • the axial movable limit of the needle 6 toward the core 3 is a position where the amateur 61 abuts on the core 3.
  • the needle 6 is guided in the axial direction by the sliding portion 63a of the valve portion 63 and the sliding portion 61a of the amateur 61 by the elastic force of the spring 4 provided inside the core 3. Moving.
  • the axial operating limit of the needle 6 in the direction away from the core 3 is the position where the valve portion 63 is seated on the valve seat 7.
  • FIG. 3 is a view showing a state of the pipe 62 constituting the fuel injection valve 100 before rolling
  • FIG. 4 is a cross-sectional view of the pipe 62 after rolling as seen from the direction of BB in FIG. .
  • the pipe 62 is made by rolling a rectangular thin flat plate 62a long in the lateral direction.
  • the flat plate 62a is manufactured from a rolled stainless steel plate having a thickness of about 0.5 mm.
  • On the center line of the flat plate 62a a through hole 9 long in the extension direction of the center line is formed by press working.
  • the center line C of the through hole 9 coincides with the center line of the flat plate 62a.
  • the upper end of the through hole 9 in the axial direction is opened from the upper surface of the flat plate 62a with a distance a, and is opened from the lower surface of the flat plate 62a with a distance b (b ⁇ 1 mm).
  • the through hole 9 has a width d (d ⁇ 0.3 mm) and extends in the center line C direction, and the upper end portion in the axial direction and the lower end portion in the axial direction are each formed in a curved shape R.
  • the flat plate 62a is rolled until the left end surface and the right end surface approach each other in FIG. 3, and the left end surface and the right end surface face each other with the slit 9s in between to form a pipe 62 having a C-shaped cross section.
  • the pipe 62 is formed with a slit 9s that extends over the entire axial length from the upper end portion in the axial direction to the lower end portion in the axial direction and has a width d on the inner diameter side of the pipe 62.
  • the upper end of the pipe 62 in the axial direction is press-fitted into the amateur 61.
  • the press-fitting is performed with the press-fitting length of ab until the distance between the lower end portion ⁇ of the amateur 61 and the upper end portion in the axial direction of the through hole 9 becomes b.
  • the pipe 62 and the lower end ⁇ of the amateur 61 are joined by welding, for example.
  • the valve portion 63 is brought into contact with the lower end portion of the pipe 62 in the axial direction and held, and the valve portion 63 is joined to the lower end portion of the pipe 62 in the axial direction by welding, for example.
  • the upper and lower welded portions of the pipe 62 have a gap b with the upper and lower ends of the through hole 9 in the axial direction, and the gap b is set to a length of about twice the wall thickness of the pipe 62. For this reason, deformation of the through holes 9 due to press working is suppressed in the upper and lower welded portions of the pipe 62, and the flat plate 62a has good roundness even when it is in the pipe state after rolling, and the amateur 61 and the valve. The contact state with the portion 63 is maintained over the entire circumference, and high-strength welding becomes possible.
  • the fuel injection valve 100 is configured as described above, and when the fuel injection valve 100 having the needle 6 is energized, the upper end surface of the amateur 61 collides with the lower end surface of the core 3. Then, the valve is opened.
  • the needle 6 is composed of an amateur 61 having a large rigidity and a valve portion 63, and a pipe 62 having a small rigidity and a mass, and mechanically has an amateur 61 and a valve portion which are mass points above and below the pipe 62 which is a spring. It has a so-called spring-mass system structure in which 63 are connected.
  • the momentum mv (physical quantity obtained by multiplying the velocity v by the mass m) at the time of a valve opening collision is the impulse Ft received by the end face of the amateur 61 (the reaction force F received from the core 3 is multiplied by the time t to receive the reaction force F).
  • the needle 6 comes to rest after being converted into a physical quantity). Since the momentum of the valve portion 63 is transmitted to the amateur 61 with a delay due to the deformation of the pipe 62, the time t described above becomes longer and the repulsive force becomes smaller. In order to weaken the repulsive force and suppress the wear of the amateur 61, the rigidity of the pipe 62 may be lowered.
  • a compressive load acts on the pipe 62 from the lower end in the axial direction by receiving the momentum of the valve portion 63.
  • the thin cylindrical portion of the pipe 62 that has received the compressive load expands in diameter toward the outer peripheral portion, and the intermediate portion that maximizes the bending stress is deformed into a barrel shape because it is maximally displaced outward in diameter.
  • the size of the diameter expansion of the middle portion of the pipe 62 is maximized in the slit 9s which is not constrained in the circumferential direction, but the diameter is expanded in a well-balanced manner because the diameter of the through hole 9 is also expanded. Since the pipe 62 is compressed in a well-balanced manner, the bending of the pipe 62 can be suppressed, which leads to the suppression of wear of the sliding portion at the time of valve opening.
  • FIG. 5 is a diagram showing a state before rolling of the pipe constituting the fuel injection valve according to the second embodiment.
  • the flat plate 62a constituting the pipe 62 has a second through hole 9a on both sides of the through hole 9 in addition to the through hole 9.
  • the second through hole 9a is formed on both sides of the through hole 9 symmetrically with respect to the axial direction of the through hole 9. Further, the second through hole 9a is formed at an intermediate position between the slit 9s (see FIG. 4) formed in the C-shaped pipe 62 and the through hole 9, and penetrates with a width d (d ⁇ 0.3 mm).
  • the hole 9 extends in the same direction as the axial direction, and the upper end portion in the axial direction and the lower end portion in the axial direction are formed in a curved shape R, respectively. Since the other configurations are the same as those in the first embodiment, the description thereof will be omitted.
  • a compressive load acts on the pipe 62 from the lower end portion in the axial direction by receiving the momentum of the valve portion 63.
  • the thin cylindrical portion of the pipe 62 that has received the compressive load expands in diameter toward the outer peripheral portion, and the intermediate portion that maximizes the bending stress is deformed into a barrel shape because it is maximally displaced outward in diameter.
  • the size of the diameter expansion of the middle portion of the pipe 62 is maximized in the slit 9s without the circumferential constraint, but the diameter of the through hole 9 on the opposite side is also expanded to the extent close to the slit 9s without the circumferential constraint.
  • the diameter is expanded in a well-balanced manner on the left and right, and the compression is performed in a well-balanced manner according to the size of the expansion. Therefore, the bending of the pipe 62 is suppressed as compared with the case where the second through hole 9a is not provided, and further, the bending deformation of the pipe 62 is increased due to the formation of the second through hole 9a. , The rigidity is lowered, which leads to the suppression of wear of the collision part at the time of the on-off valve.
  • FIG. 6 is a diagram showing a state before rolling of the pipe constituting the fuel injection valve according to the third embodiment.
  • the flat plate 62a constituting the pipe 62 has a third through hole 11a which has an axis orthogonal to the axis of the through hole 9 in addition to the through hole 9 and is long in the lateral direction and intersects the through hole 9. It is formed. Further, on the left and right ends of the third through hole 11a, there is a gap with the third through hole 11a and is long in the lateral direction, that is, a second slit having the same axis as the axis of the third through hole 11a. 11b is formed.
  • the second slit 11b is open to the left end surface and the right end surface of the flat plate 62a, that is, the slit 9s, respectively. Further, above the third through hole 11a and the second slit 11b, there is a gap between the through hole 9 and the through hole 9, which is symmetrical with respect to the through hole 9 and is long in the lateral direction. A fourth through hole 11c having an axis orthogonal to the axis is formed.
  • the first layer is formed by the two fourth through holes 11c
  • the second layer is formed by the third through holes 11a and the two second slits 11b.
  • the width e of the third through hole 11a, the two second slits 11b, and the two fourth through holes 11c is formed so that e ⁇ 0.4 mm.
  • the distance f between the first layer and the second layer is formed so that f ⁇ 0.8 mm.
  • the through hole 9 is opened from the first layer to the second layer. Since the other configurations are the same as those of the first or second embodiment, the description of the illustration will be omitted.
  • a compressive load acts on the pipe 62 from the lower end portion in the axial direction by receiving the momentum of the valve portion 63.
  • the load received on the downstream side of the pipe 62 is the meat portion 12b formed between the third through hole 11a and the second slit 11b forming the second layer. Is applied to the central portion of the meat portion 12a formed between the layers of the first layer and the second layer.
  • Both ends of the meat portion 12a are supported by two meat portions of the first layer, and a load is applied to the center of the double-sided beam, so that bending deformation occurs, the rigidity becomes low, and the meat portion 12a opens and closes. This is linked to the suppression of wear at the collision part during the valve.
  • the elements of the two left and right double-sided beams are arranged independently with slits 9s and through holes 9 adjacent to each other on both sides without lateral restraint, and are deformed in the lateral direction when a compressive load is applied. Is not constrained, so the amount of deformation is large and the left-right balance is good.
  • FIG. 8 is a diagram showing a state before rolling of the pipe constituting the fuel injection valve according to the fourth embodiment.
  • the flat plate 62a constituting the pipe 62 has a third through hole 11a in addition to the through hole 9, and a gap with the third through hole 11a on both left and right ends of the third through hole 11a. Therefore, a second slit 11b that is long in the lateral direction is formed.
  • a fifth through hole 11d Long in the lateral direction and a fifth through hole 11d on both sides of the fifth through hole 11d in the lateral direction.
  • a long third slit 11e is formed.
  • the first layer is composed of the fifth through hole 11d and the third slit 11e.
  • a second layer is formed below the first layer with an interval f, and the second layer is symmetrical with respect to the through hole 9 and has a gap with the through hole 9 and is long in the lateral direction. It is formed by the through hole 11c of.
  • a third layer having a space f and composed of a third through hole 11a and a second slit 11b having the same shape as the first layer is configured. Then, a fifth through hole 11d and two third slits 11e forming the first layer, two fourth through holes 11c forming the second layer, and a third through hole 11c forming the third layer are formed.
  • the width e of the through hole 11a and the two second slits 11b is formed so that e ⁇ 0.4 mm. Further, the distance f between the first layer and the second layer and the distance f between the second layer and the third layer are formed at f ⁇ 0.8 mm. Then, the through hole 9 is opened from the first layer to the third layer. Since the other configurations are the same as those of the first, second, and third embodiments, the illustration description will be omitted.
  • the pipe 62 receives the momentum of the valve portion 63 and a compressive load acts from the lower end portion in the axial direction at the time of a valve opening collision.
  • the load received by the downstream end of the pipe 62 is between the second layer and the third layer via the meat portion 12b formed between the third through hole 11a and the second slit 11b forming the third layer. It is applied to the central portion of the meat portion 12a formed in.
  • Both ends of the meat portion 12a are supported by two meat portions of the second layer, and a load is applied to the center of the double-sided beam.
  • the meat portion 12b of the third layer is connected to both ends of the meat portion 12c formed between the layers of the first layer and the second layer, and the meat portion 12c is supported by the meat portion of the first layer and has both sides.
  • the load is received at the center of the beam. Therefore, the two double-sided beams are arranged in series, and the deformation is increased and the rigidity is further lowered as compared with the third embodiment, which leads to the suppression of wear of the collision portion at the time of the on-off valve.
  • the elements of the two double-sided beams arranged in series on the left and right are arranged in an independent state with slits 9s and through holes 9 adjacent to each other on both sides without lateral restraint, and when a compressive load is applied. Since the deformation in the lateral direction is not restricted, the amount of deformation is large and the left-right balance is good.
  • FIG. 9 is a diagram showing a state before rolling of the pipe constituting the fuel injection valve according to the fifth embodiment.
  • the position of the upper end portion of the through hole 9 in the axial direction is positioned at the welded portion between the amateur 61 and the pipe 62, that is, the core 3 from the lower end portion ⁇ of the amateur 61.
  • it is formed to have a length that crosses the lower end ⁇ of the amateur 61, which is a welded portion.
  • Other configurations are the same as those in the first embodiment, and thus the description thereof will be omitted.
  • the fuel injection valve according to the fifth embodiment is configured as described above, and the amateur 61 and the pipe 62 are connected by laser welding the lower end portion of the amateur 61 and the welded portion of the pipe 62.
  • the welded portion subjected to the point-shaped laser irradiation melts and both metals are mixed, but after the laser irradiation is completed, shrinkage occurs due to solidification and cooling, and the amateur 61 is pulled by the welded portion and bent and deformed.
  • the rotation of the needle 6 makes one rotation on the circumference of the boundary between the two, and the entire circumference welding is completed.
  • the bending deformation occurs in each part of the point-shaped welded portion, but the same deformation occurs on the facing side of the shaft by the all-around welding, and as a result, the bending deformation of the amateur 61 is suppressed.
  • the slit 9s is formed in the pipe 62 and the through hole 9 is formed on the opposite side of the slit 9s via the central axis of the pipe 62, the amateur 61 and the pipe 62 are slit. Since the pipe 62 is welded at an even portion excluding the 9s and the through hole 9, the pipe 62 can be prevented from bending and deforming, and the needle 6 with less bending can be obtained. As a result, wear of the sliding portion due to the sliding operation is suppressed, and a change in the flow rate due to long-term use can be prevented.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
PCT/JP2019/043413 2019-11-06 2019-11-06 燃料噴射弁 WO2021090388A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201980101637.0A CN114616389A (zh) 2019-11-06 2019-11-06 燃料喷射阀
PCT/JP2019/043413 WO2021090388A1 (ja) 2019-11-06 2019-11-06 燃料噴射弁
JP2021554456A JPWO2021090388A1 (enrdf_load_stackoverflow) 2019-11-06 2019-11-06

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/043413 WO2021090388A1 (ja) 2019-11-06 2019-11-06 燃料噴射弁

Publications (1)

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WO2021090388A1 true WO2021090388A1 (ja) 2021-05-14

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PCT/JP2019/043413 WO2021090388A1 (ja) 2019-11-06 2019-11-06 燃料噴射弁

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CN (1) CN114616389A (enrdf_load_stackoverflow)
WO (1) WO2021090388A1 (enrdf_load_stackoverflow)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02107877A (ja) * 1988-09-14 1990-04-19 Robert Bosch Gmbh 電磁作動式の弁
JPH08177689A (ja) * 1994-12-28 1996-07-12 Nippon Soken Inc 内燃機関の燃料供給装置
JPH10506164A (ja) * 1994-09-20 1998-06-16 シーメンス オートモーティヴ コーポレイション 切欠きが形成されたニードルはずみ排除装置
JP2001502400A (ja) * 1997-07-15 2001-02-20 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 電磁的に操作可能な弁
JP2002130073A (ja) * 2000-10-18 2002-05-09 Aisan Ind Co Ltd 電磁式燃料噴射弁のバルブ製造方法
DE102011078732A1 (de) * 2011-07-06 2013-01-10 Robert Bosch Gmbh Vorrichtung zur Einspritzung von Kraftstoff
EP2664779A1 (de) * 2012-05-15 2013-11-20 Robert Bosch GmbH Ventil zum Zumessen von Fluid

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02107877A (ja) * 1988-09-14 1990-04-19 Robert Bosch Gmbh 電磁作動式の弁
JPH10506164A (ja) * 1994-09-20 1998-06-16 シーメンス オートモーティヴ コーポレイション 切欠きが形成されたニードルはずみ排除装置
JPH08177689A (ja) * 1994-12-28 1996-07-12 Nippon Soken Inc 内燃機関の燃料供給装置
JP2001502400A (ja) * 1997-07-15 2001-02-20 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 電磁的に操作可能な弁
JP2002130073A (ja) * 2000-10-18 2002-05-09 Aisan Ind Co Ltd 電磁式燃料噴射弁のバルブ製造方法
DE102011078732A1 (de) * 2011-07-06 2013-01-10 Robert Bosch Gmbh Vorrichtung zur Einspritzung von Kraftstoff
EP2664779A1 (de) * 2012-05-15 2013-11-20 Robert Bosch GmbH Ventil zum Zumessen von Fluid

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JPWO2021090388A1 (enrdf_load_stackoverflow) 2021-05-14
CN114616389A (zh) 2022-06-10

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