EP0383063B1 - Magnetanker - Google Patents

Magnetanker Download PDF

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Publication number
EP0383063B1
EP0383063B1 EP90101367A EP90101367A EP0383063B1 EP 0383063 B1 EP0383063 B1 EP 0383063B1 EP 90101367 A EP90101367 A EP 90101367A EP 90101367 A EP90101367 A EP 90101367A EP 0383063 B1 EP0383063 B1 EP 0383063B1
Authority
EP
European Patent Office
Prior art keywords
magnetic armature
valve body
valve
magnet armature
magnetic
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP90101367A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0383063A1 (de
Inventor
Ferdinand Dipl.-Ing. Reiter (Ba)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0383063A1 publication Critical patent/EP0383063A1/de
Application granted granted Critical
Publication of EP0383063B1 publication Critical patent/EP0383063B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
    • 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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/90—Electromagnetically actuated fuel injector having ball and seat type valve

Definitions

  • the invention is based on a magnetic armature according to the preamble of the main claim.
  • a magnet armature known (DE-OS 34 18 761 or US-PS 46 51 931), which is made of solid material by drilling and machining surface removal, the various manufacturing steps being very cost-intensive and burrs occurring in various places must be removed.
  • this known magnet armature has a relatively high weight, which results in an undesirable delay in the movement of the magnet armature when the electromagnet is excited or de-energized by the larger mass to be accelerated.
  • the magnetic armature according to the invention with the characterizing features of the main claim has the advantage that it can be manufactured inexpensively in a simple manner and at the same time has flow channels for the medium to be controlled with the lowest possible weight. Deburring processes are unnecessary due to non-cutting shaping and very short response times are achieved due to the low weight when energizing or de-energizing the electromagnet.
  • the magnet armature can advantageously be sawed off from a tube profiled in this way or produced by sintering.
  • FIG. 1 shows an electromagnetically actuated fuel injection valve with a first exemplary embodiment of a magnet armature designed according to the invention
  • FIG. 2 shows a section along the line II-II in FIG. 1
  • FIG. 3 shows a partial view of a second exemplary embodiment of a magnet armature designed according to the invention
  • FIG. 4 shows a section along the line IV-IV in Figure 3.
  • the electromagnetically actuated valve shown in FIG. 1, for example, in the form of an injection valve for fuel as an aggregate of a fuel injection system of a mixture-compressing spark-ignition internal combustion engine has a tubular metal connecting piece 1 made of ferromagnetic material, on the lower core end 2 of which a magnet coil 3 is arranged.
  • the connector 1 thus serves as the core.
  • an intermediate part 6 is connected concentrically to the longitudinal valve axis 4 tightly with the connecting piece 1, for example by soldering or welding.
  • the intermediate part 6 is made of non-magnetic sheet metal, which is deep-drawn and has a first connecting section 47 running coaxially with the valve longitudinal axis 4, with which it completely engages around the core end 2 and is tightly connected to it.
  • a collar 48 which extends radially outward from the first connecting section 47 leads to a second connecting section 49 of the intermediate part 6, which extends coaxially to the longitudinal valve axis 4 and partially projects beyond a connecting part 39 in the axial direction and is tightly connected thereto, for example by soldering or Welding.
  • the diameter of the second connecting section 49 is thus larger than the diameter of the first connecting section 47, so that in the assembled state the tubular connecting part 39 rests with an end face 50 on the collar 48.
  • the first connecting section 47 encompasses a holding shoulder 51 of the core end 2, which has a smaller diameter than the connecting piece 1, and the second connecting section 49 encompasses a holding shoulder 52 of the connecting part which is also of a smaller diameter than in the adjacent area 39.
  • the connecting part 39 made of ferromagnetic material has a holding bore 41 facing away from the end face 50, into which a valve seat body 8 is inserted in a sealed manner, for example by screwing, welding or soldering.
  • the holding bore 41 merges into a transition bore 53, which is adjoined in the vicinity of the end face 50 by a sliding bore 54, into which a magnet armature 12 projects and through which the magnet armature 12 is guided.
  • the holding bore 41 and sliding bore 54 can be produced in one clamping during production, so that bores which are aligned exactly with one another result.
  • the magnet armature 12 is not by the intermediate part 6 still guided the transition bore 53 of the connecting part 39.
  • the axial extent of the sliding bore 54 is small compared to the axial length of the magnet armature 12, for example approximately 1/15 of the length of the magnet armature.
  • the metal valve seat body 8 has a fixed valve seat 9 facing the core end 2 of the connecting piece 1.
  • the series of connecting pieces 1, intermediate part 6, connecting part 39 and valve seat body 8 represents a rigid metal unit.
  • a valve body 10 projecting into the transition bore 53 is inserted and connected, which has a thin-walled round connecting pipe 36 and comprises a valve closing member 14 which is connected to the other end of the connecting tube 36 facing the valve seat 9 and may, for example, have the shape of a sphere, a hemisphere or some other shape.
  • the other end of the return spring 18 projects into a flow bore 21 of the connecting piece 1 and lies there against a tubular adjusting bush 22 which is screwed or pressed into the flow bore 21, for example, to adjust the spring tension.
  • At least a part of the connecting piece 1 and the magnetic coil 3 in their entire axial length are enclosed by a plastic jacket 24, which also encloses at least a part of the intermediate part 6 and the connecting tube 36.
  • the plastic jacket 24 can be achieved by pouring or extrusion coating with plastic.
  • an electrical connector 26 is formed on the plastic casing 24, via which the electrical contact of the magnet coil 3 and thus its excitation takes place.
  • the magnet coil 3 is surrounded by at least one guide element 28 serving as a ferromagnetic element for guiding the magnetic field lines, which is made of ferromagnetic material and extends in the axial direction over the entire length of the magnet coil 3 and at least partially surrounds the magnet coil 3 in the circumferential direction.
  • at least one guide element 28 serving as a ferromagnetic element for guiding the magnetic field lines, which is made of ferromagnetic material and extends in the axial direction over the entire length of the magnet coil 3 and at least partially surrounds the magnet coil 3 in the circumferential direction.
  • the guide element 28 is designed in the form of a bracket with a curved central region 29 which is adapted to the contour of the magnetic coil and which only partially surrounds the magnetic coil 3 in the circumferential direction and has end sections 31 which extend inwards in the radial direction and which have the connecting piece 1 and the other Merging connecting part 39 partially encompassing one shell end 32 running in the axial direction.
  • 1 shows a valve with two guide elements 28, which can be arranged opposite one another. It may also be expedient for spatial reasons to let the electrical connector 26 run in a plane that is rotated by 90 °, that is to say perpendicular to a plane through the guide elements 28.
  • a radially penetrating slot 37 is provided, which extends over the entire length of the connecting tube 36 and through which the fuel flowing from the magnet armature 12 into an inner channel 38 of the connecting tube 36 into the transition bore 53 and from there to Valve seat 9 can reach, downstream of which at least one spray opening 17 is formed in the valve seat body 8, via which the fuel is sprayed into an intake manifold or a cylinder of an internal combustion engine.
  • connection between the connecting tube 36 and the magnet armature 12 and the valve closing member 14 is advantageously carried out by welding or soldering.
  • the pipe wall from the inner channel 38 to In this exemplary embodiment, the penetrating slot 37 runs in a plane passing through the longitudinal axis 4 of the valve from one end to the other end of the connecting pipe 36.
  • the slot 37 represents a large-area hydraulic flow cross-section, through which the fuel flows very quickly from the inner channel 38 into the transition bore 53 and thus can get to the valve seat 9.
  • the thin-walled connecting tube 36 ensures maximum stability with the lowest weight.
  • connection tube 36 can be produced in such a way that sheet metal sections with a rectangular shape are produced from a metal sheet having the thickness of the tube wall, for example by stamping, the one side lengths of which are the length of the connection tube 36 to be produced in the axial direction and the other side lengths of which are approximately the circumference of the connection tube to be produced correspond. Then each sheet metal section is rolled or bent into the shape of the desired connecting tube 36, for example with the aid of a mandrel. The two longitudinal end faces of the sheet metal section forming the connecting tube 36 form the slot 37 in that they lie opposite one another at a distance.
  • the connecting pipe 36 with a plurality of flow openings 56, which distribute the pipe wall approximately symmetrically, also in the axial direction penetrate the connecting tube 36.
  • Either the flow openings 56 are obtained in that the sheet metal sections 55 are produced from already perforated sheets, or the flow openings 56 are produced at the same time as the sheet metal sections 55 are produced.
  • the flow openings 56 can run in such a way that the fuel emerging in the transition bore 53 exits radially or is given a swirl.
  • the flow openings 56 can also be inclined in the direction of the valve seat 9.
  • the hollow magnetic armature 12 has a circumference which is profiled in a wave shape over its entire length in such a way that so-called wave troughs 60 and wave peaks projecting beyond it alternate on the connecting tube 36 which is part of the valve body 10 61 are formed.
  • the wave crests 61 have an essentially circular outer surface 62, by means of which the magnet armature 12 is slidably mounted in the sliding bore 54.
  • the troughs 60 of the magnet armature 12 have inner surfaces 63 which form the fastening opening 13 and bear against the connecting tube 36 of the valve body 10 and are connected to the latter, for example, by laser welding.
  • the wave crests 61 have inner surfaces 64 facing the connecting tube 36, which are at a distance from the connecting tube 36 in the radial direction, so that flow cross sections 65 each extending in the axial direction are formed between the inner surfaces 64 of the wave crests 61 of the magnet armature 12 and the connecting tube 36.
  • three wave troughs 60 and three wave crests 61 are provided on the magnet armature 12.
  • the number of wave troughs 60 and wave crests 61 and thus the shape of the profile of the circumference of the magnet armature 12 can be changed and adapted to the requirements of the respective electromagnetically actuated valve.
  • the magnet armature 12 according to the invention can be produced, for example, by sintering, by deforming an annular tube having the required length of the magnet armature 12, or by means of a profiled tube from which the magnet armature 12 is separated in the required length.
  • the wave-shaped profile of the armature 12 also enables creation of flow cross sections 65, over which and over the outer circumference of the troughs 60 fuel can flow freely past the magnet armature 12, even if the valve body 10 should be designed as a solid body instead of the connecting tube 36. In any case, the wall of the hollow armature 12 should have the smallest possible thickness in order to keep the weight of the magnet armature 12 as low as possible.
  • the parts that remain the same and have the same effect as in the first exemplary embodiment according to FIGS. 1 and 2 are identified by the same reference numerals.
  • the magnet armature 12 according to FIGS. 3 and 4 only has an area 70 surrounding the valve body 10 in the form of its connecting tube 36, which is profiled in an undulating manner and alternates in accordance with the exemplary embodiment according to FIGS. 1 and 2 has wave troughs 60 abutting the connecting tube 36 and wave crests 61 projecting beyond them in the radial direction.
  • the inner surfaces 63 of the wave troughs 60 also abut the periphery of the connecting tube 36 and are connected to it.
  • the remaining area 71 of the magnet armature, which extends in the direction of the core end 2, is tubular with an annular cross section and has a clear width 72 which is larger than the diameter of the fastening opening 13.
  • the region 71 preferably projects into the sliding bore 54.
  • the exemplary embodiment of the magnet armature 12 shown in FIGS. 3 and 4 likewise has a small wall thickness and can either be produced by sintering or by deforming a tube having the required length of the magnet armature 12 in the region 70 for producing the undulating circumferential region of the magnet armature 12 for attachment to the connecting pipe 36.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Composite Materials (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electromagnets (AREA)
EP90101367A 1989-02-15 1990-01-24 Magnetanker Expired - Lifetime EP0383063B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3904447A DE3904447A1 (de) 1989-02-15 1989-02-15 Magnetanker
DE3904447 1989-02-15

Publications (2)

Publication Number Publication Date
EP0383063A1 EP0383063A1 (de) 1990-08-22
EP0383063B1 true EP0383063B1 (de) 1992-04-22

Family

ID=6374077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90101367A Expired - Lifetime EP0383063B1 (de) 1989-02-15 1990-01-24 Magnetanker

Country Status (6)

Country Link
US (1) US4946132A (pt)
EP (1) EP0383063B1 (pt)
JP (1) JP3112080B2 (pt)
KR (2) KR970009536B1 (pt)
BR (1) BR9000661A (pt)
DE (2) DE3904447A1 (pt)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3925212C2 (de) * 1989-07-29 1997-03-27 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE4008675A1 (de) * 1990-03-17 1991-09-19 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
US5199648A (en) * 1991-03-20 1993-04-06 Zexel Corporation Fuel injection valve
DE4111987C2 (de) * 1991-04-12 1995-01-12 Bosch Gmbh Robert Elektromagnetventil
US5544816A (en) * 1994-08-18 1996-08-13 Siemens Automotive L.P. Housing for coil of solenoid-operated fuel injector
DE19629589B4 (de) * 1996-07-23 2007-08-30 Robert Bosch Gmbh Brennstoffeinspritzventil
JPH1047209A (ja) * 1996-07-29 1998-02-17 Mitsubishi Electric Corp 筒内噴射用燃料噴射弁
JP3913841B2 (ja) * 1997-07-02 2007-05-09 本田技研工業株式会社 噴射弁
DE19730202A1 (de) * 1997-07-15 1999-01-21 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
US5957161A (en) * 1998-11-05 1999-09-28 Borg-Warner Automotive, Inc. Long stroke balanced solenoid
US6283384B1 (en) * 1999-11-23 2001-09-04 Siemens Automotive Corporation Fuel injector with weld integrity arrangement
US6422486B1 (en) 2000-03-31 2002-07-23 Siemens Automotive Corporation Armature/needle assembly for a fuel injector and method of manufacturing same
WO2002018828A1 (fr) * 2000-08-28 2002-03-07 Nok Corporation Vanne electromagnetique
JP2002074000A (ja) 2000-08-28 2002-03-12 Sanwa Bank Ltd 情報通信ネットワークを介した資金決済処理支援システム
DE10143500A1 (de) * 2001-09-05 2003-03-20 Bosch Gmbh Robert Brennstoffeinspritzventil
US7458530B2 (en) * 2001-10-05 2008-12-02 Continental Automotive Systems Us, Inc. Fuel injector sleeve armature
US6644568B1 (en) * 2002-10-24 2003-11-11 Visteon Global Technologies, Inc. Fuel injector with spiral-wound spring adjustment tube
EP2354528B1 (en) * 2010-01-15 2012-08-29 Continental Automotive GmbH Valve assembly and injection valve

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1543001A (en) * 1923-09-05 1925-06-23 Edwin G Gaynor Magnetic core
JPS5735570U (pt) * 1980-08-07 1982-02-24
DE3046890A1 (de) * 1980-12-12 1982-07-15 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil, insbesondere kraftstoffeinspritzventil fuer kraftstoffeinspritzanlagen
US4342421A (en) * 1981-02-23 1982-08-03 General Motors Corporation Thermostatic expansion valve for a refrigeration system
DE3207917A1 (de) * 1982-03-05 1983-09-15 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil
DE3418761A1 (de) * 1984-05-19 1985-11-21 Robert Bosch Gmbh, 7000 Stuttgart Einspritzventil
DE3600386A1 (de) * 1986-01-09 1987-07-16 Schramme Gmbh Hubmagnet
DE3711850A1 (de) * 1987-04-08 1988-10-27 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil

Also Published As

Publication number Publication date
EP0383063A1 (de) 1990-08-22
BR9000661A (pt) 1991-01-15
JP3112080B2 (ja) 2000-11-27
DE59000095D1 (de) 1992-05-27
DE3904447A1 (de) 1990-08-16
US4946132A (en) 1990-08-07
KR0130464B1 (ko) 1998-04-09
KR900013196A (ko) 1990-09-05
JPH02240476A (ja) 1990-09-25
KR900013197A (ko) 1990-09-05
KR970009536B1 (en) 1997-06-14

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