EP1966483B1 - Elektromagnetisch betätigbares ventil - Google Patents

Elektromagnetisch betätigbares ventil Download PDF

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Publication number
EP1966483B1
EP1966483B1 EP06829923.9A EP06829923A EP1966483B1 EP 1966483 B1 EP1966483 B1 EP 1966483B1 EP 06829923 A EP06829923 A EP 06829923A EP 1966483 B1 EP1966483 B1 EP 1966483B1
Authority
EP
European Patent Office
Prior art keywords
core
armature
coil body
valve
conducting element
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.)
Active
Application number
EP06829923.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1966483A1 (de
Inventor
Ferdinand Reiter
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 EP1966483A1 publication Critical patent/EP1966483A1/de
Application granted granted Critical
Publication of EP1966483B1 publication Critical patent/EP1966483B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • 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
    • H01F7/1638—Armatures not entering the winding
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit

Definitions

  • the invention is based on an electromagnetically actuated valve according to the preamble of the main claim.
  • FIG. 1 a known fuel injection valve of the prior art is shown, which has a classic three-part construction of an inner metal flow guide member and at the same time housing component.
  • This inner valve tube is formed from an inlet port forming an inner pole, a nonmagnetic intermediate part and a valve seat carrier receiving a valve seat, and in the description FIG. 1 explained in more detail.
  • the inner valve tube forms the backbone of the entire injection valve and has in its entirety of the three individual components an essential support function.
  • the non-magnetic intermediate part is connected by welds both tight and tight with the inlet port and with the valve seat carrier.
  • the windings of a magnetic coil are introduced into a plastic coil bobbin, which in turn surrounds in the circumferential direction a part of the inlet port serving as inner pole and also the intermediate part.
  • a wedge-shaped surface is provided prior to the application of a wear-resistant layer, which is variable in each case according to a magnetic and hydraulic optimum.
  • the annular abutment portion formed by the wedging has a defined stop surface width or contact width, which remains largely constant over the entire service life, since a stop surface wear during continuous operation does not lead to an increase in the contact width.
  • the guide of the axially movable armature is ensured by an inner guide surface of the intermediate part.
  • an electromagnetically operable valve in the form of a fuel injector for fuel injection systems of internal combustion engines, comprising a core, a solenoid, a coil body receiving the coil, and an armature actuating a valve closing body cooperating with a fixed valve seat.
  • the solenoid When the solenoid is energized, the armature is attracted to the core.
  • the magnetic circuit is further formed by an outer magnetic flux component, which includes a cup-shaped guide element and a guide ring as an armature-side flux guide.
  • the armature-side flux-conducting element is arranged such that when the magnet coil is energized, the magnetic field lines can pass directly onto the armature, since the guide ring radially surrounds it at the level of the armature.
  • the inserted between the tubular valve sleeve is made of a non-magnetic steel and thus forms a narrow air gap in the magnetic circuit, which hardly prevents the magnetic flux.
  • an electromagnetically operable valve in the form of a fuel injector for fuel injection systems of internal combustion engines, comprising a core, a solenoid, a coil body receiving the coil, and an armature actuating a valve closing body cooperating with a fixed valve seat.
  • the solenoid When the solenoid is energized, the armature is attracted to the core.
  • the magnetic circuit is furthermore formed by an outer magnetic flux component to which at least three ferromagnetic components surrounding the magnetic coil belong.
  • An armature-side flux-conducting element is arranged in such a way that the magnetic field lines can pass directly onto the armature when the magnet coil is energized, since the magnet coil is enclosed radially inwardly by a plastic component which ensures that the outer magnetic flux components do not generate a magnetic short circuit.
  • the inserted between the core and armature and outer magnetic circuit component including solenoid coil tubular sleeve is made of a non-magnetic steel and thus forms a narrow air gap in the magnetic circuit, which hardly prevents the magnetic flux outside of the plastic component.
  • the electromagnetically actuated valve according to the invention with the characterizing features of the main claim has the advantage that a simplified and cost-effective installation of the valve can be realized because it can be dispensed with the non-magnetic intermediate part.
  • the bobbin additionally assumes the function of magnetic separation in the electromagnetic circuit and increases the stability in the region of the magnetic coil. Cohesive joining methods, such as welding, which have the disadvantage of heat distortion, are not used. Rather, particularly advantageous plastic-metal press connections can be used, which are simple and very safe and reliable attachable.
  • the arrangement according to the invention also has the advantage of reducing the structure-borne noise and thus the noise development compared with known solutions.
  • the plastic-metal press connections can be produced in a particularly reliable and reliable manner if sawtooth-like structures are provided in the overlapping areas of the bobbin or insert part and the core as well as the flux guide element.
  • the plastic-metal press connections can be produced in a particularly reliable and reliable manner if sawtooth-like structures are provided in the overlapping areas of the bobbin or insert part and the core as well as the flux guide element.
  • the core and flux guide in the bobbin or in the surrounding of the bobbin insert corresponds to the sawtooth-like structure of the core or the flux with the directly opposite surface of the bobbin or surrounded by the bobbin insert by the sawtooth-like structure in the plastic penetrates and the plastic relaxes.
  • FIG. 1 shown electromagnetically operable valve in the form of an injection valve for fuel injection systems of mixture-compression, spark-ignition internal combustion engine has a magnetic coil 1, serving as a fuel inlet nozzle and inner pole core 2, which is for example tubular here and over its entire length has a constant outer diameter.
  • a coil body 3 stepped in the radial direction accommodates a winding of the magnet coil 1 and, in conjunction with the core 2, enables a compact construction of the injection valve in the region of the magnet coil 1.
  • a lower core end 9 of the core 2 is concentric with a valve longitudinal axis 10 tightly connected to a tubular metal non-magnetic intermediate part 12, for example by welding and surrounds the core end 9 partially axially.
  • the stepped bobbin 3 partially overlaps the core 2 and with a step 15 of larger diameter, the intermediate part 12 at least partially axially.
  • Downstream of the bobbin 3 and the intermediate part 12 extends a tubular valve seat support 16 which is fixedly connected to the intermediate part 12.
  • a tubular valve needle 19 is arranged, which at its downstream end 20 with a spherical valve-closing body 21, at its periphery, for example, five Flats 22 are provided for flowing past the fuel, for example, is connected by welding.
  • the actuation of the injection valve takes place in a known manner electromagnetically.
  • the electromagnetic circuit For axial movement of the valve needle 19 and thus to open against the spring force of a return spring 25 and closing the injector is the electromagnetic circuit with the solenoid 1, the core 2 and an armature 27.
  • the armature 27 is remote from the valve closing body 21 end of the Valve needle 19 is connected by a weld 28 and aligned with the core 2.
  • the core 2 opposite end of the valve seat carrier 16 is in the longitudinal bore 17, a cylindrical valve seat body 29 having a fixed valve seat, tightly mounted by welding.
  • valve closing body 21 For guiding the valve closing body 21 during the axial movement of the valve needle 19 with the armature 27 along the valve longitudinal axis 10 serves a guide opening 32 of the valve seat body 29.
  • the spherical valve closing body 21 cooperates with the frusto-conical in the flow direction valve seat of the valve seat body 29.
  • the valve seat body 29 At its end facing away from the valve closing body 21, the valve seat body 29 is concentrically and firmly connected to an injection-molded perforated disk 34, for example of cup shape.
  • injection-molded perforated disk 34 for example of cup shape.
  • the spray perforated disk 34 In the bottom part of the spray perforated disk 34 extends at least one, for example, four formed by eroding or punching ejection openings 39th
  • the depth of insertion of the valve seat body 29 with the cup-shaped spray disk 34 determines the default setting of the stroke of the valve needle 19.
  • the one end position of the valve needle 19 is fixed at non-energized solenoid 1 by the system of the valve closing body 21 on the valve seat of the valve seat body 29, while the other end position the valve needle 19 results in excited magnetic coil 1 by the system of the armature 27 at the core end 9.
  • adjusting sleeve 48 which is formed for example of rolled spring steel, is used to adjust the spring bias of the adjusting sleeve 48 restoring spring 25, which in turn with its opposite side to the valve needle 19th supported.
  • the injection valve is largely enclosed by a plastic extrusion coating 50.
  • plastic extrusion coating 50 includes, for example, a mitangespritzter electrical connector 52.
  • a fuel filter 61 projects into the flow bore 46 of the core 2 at its inlet end 55 into it and ensures the filtering out of such fuel components that could cause blockages or damage due to their size in the injector.
  • FIG. 2 are a first and second embodiment of a bobbin 3 according to the invention in an enlarged view corresponding to the section II in FIG. 1 shown.
  • the inventive bobbin 3 made of a plastic is characterized in that it takes over the function of the known intermediate part 12.
  • FIG. 2 a first example of a bobbin 3 is shown on the right, which has a stepped inner opening 62. At least in a certain overlap region of bobbin 3 and core 2 or valve seat carrier 16, the inner wall of the bobbin 3 is formed in the region of the inner opening 62 with a slightly inwardly offset, substantially flat surface.
  • This surface of the bobbin 3 corresponds to a sawtooth-like structure 63 at the core end 9 of the core 2 and at the upper end of the valve seat support 16.
  • Both the core 2 and the valve seat support 16 are for establishing firm connections with the bobbin 3 in the inner opening 62nd of the bobbin 3 is pressed, in such a way that the structure 63 firmly, securely and rotationally fixed hooked against the surface of the bobbin 3 and spreads.
  • the sawtooth-like structure 63 of the metal component 2, 16 thus penetrates into the plastic of the bobbin 3, and the plastic relaxes below.
  • Dispensing with a non-magnetic intermediate part advantageously takes over the bobbin 3 itself in addition to the function of magnetic separation in the electromagnetic circuit and increases the stability in the field of magnetic coil 1.
  • Cohesive joining methods, such as welding, which have the disadvantage of heat distortion, are not used ,
  • FIG. 3 are a third and a fourth embodiment of the bobbin 3 according to the invention in an enlarged view corresponding to the section III in FIG. 1 shown.
  • the examples differ according to FIG. 3 in particular in that the bobbin 3 is made in two parts.
  • the bobbin 3 has for this purpose an inner insert part 3a, which is designed to be thin-walled and also stepped according to the stepped inner opening 62 of the bobbin 3 is adjusted.
  • the bobbin 3 according to the invention with its insert part 3 a made of a plastic is also distinguished by the fact that it assumes the function of the known intermediate part 12.
  • FIG. 3 is a third and a fourth embodiment of the bobbin 3 according to the invention in an enlarged view corresponding to the section III in FIG. 1 shown.
  • the examples differ according to FIG. 3 in particular in that the bobbin 3 is made in two parts.
  • the bobbin 3 has for this purpose an inner insert part 3a, which is designed to be thin-walled and also stepped according to the
  • a third example of a bobbin 3 which has a stepped inner opening 62.
  • the inner opening 62 of the bobbin 3 is smooth-walled for receiving the stepped insert part 3 a, so that the bobbin 3 surrounds the insert part 3 a.
  • the inner wall of the insert part 3a is formed in the region of the inner opening 62a with a substantially flat surface. This surface of the insert 3a corresponds to a sawtooth-like structure 63 at the core end 9 of the core 2 and at the upper end of the valve seat support 16.
  • Both the core 2 and the valve seat support 16 are for establishing firm connections with the bobbin 3 in the inner opening 62a of the insert part 3a, in such a way that the structure 63 firmly and safely locked and, for example, rotationally fixed hooked on the surface of the insert part 3a and spreads.
  • the sawtooth-like structure 63 of the metal component 2, 16 thus penetrates into the plastic of the insert part 3 a, and the plastic subsequently relaxes.
  • the Einpresstiefe be set for these components in the insert part 3a, where the core 2 and the valve seat carrier 16 then rest in the pressed state.
  • the valve seat carrier 16th It is also possible to arrange another metal component in the form of a nozzle body or an armature-side flux-conducting element, which is pressed into the insert part 3a.
  • the guide of the axially movable armature 27 takes place on the right side of FIG. 3 for example, by a radially inwardly projecting guide collar 65 on the insert part 3a, which is seen over the axial extent of the insert part 3a between the two structures 63 of the insert part 3a.
  • the guide collar 65 of the insert part 3a thus extends into a gap 66 between the core end 9 of the core 2 and the valve seat carrier 16.
  • the leadership of the axially movable armature 27 takes place on the left side of FIG. 3 in contrast, for example, by a radially inwardly projecting guide collar 67 at the upper end of the valve seat carrier 16.
  • material of the insert part 3a extends slightly into the gap 66 between the core end 9 of the core 2 and the valve seat carrier 16 inside.
  • FIG. 4 shows a representation of a section through the bobbin 3 and the insert part 3a along the line IV-IV in FIG. 3
  • the insert part 3a has a shaped element 69, for example in the form of a nose, which serves as Verwoodfixtician and engages in a corresponding recess of the bobbin 3.
  • the invention is not limited to an application in a fuel injection valve, but can be used in various types of electromagnetically operable valves, in which magnetic field lines 1 are guided by a flux guide 16 via a movable armature 27 and a fixed core 2.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)
EP06829923.9A 2005-12-22 2006-10-30 Elektromagnetisch betätigbares ventil Active EP1966483B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510061410 DE102005061410A1 (de) 2005-12-22 2005-12-22 Elektromagnetisch betätigbares Ventil
PCT/EP2006/067911 WO2007073964A1 (de) 2005-12-22 2006-10-30 Elektromagnetisch betätigbares ventil

Publications (2)

Publication Number Publication Date
EP1966483A1 EP1966483A1 (de) 2008-09-10
EP1966483B1 true EP1966483B1 (de) 2017-06-07

Family

ID=37691781

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06829923.9A Active EP1966483B1 (de) 2005-12-22 2006-10-30 Elektromagnetisch betätigbares ventil

Country Status (5)

Country Link
US (1) US8833678B2 (ja)
EP (1) EP1966483B1 (ja)
JP (1) JP5039054B2 (ja)
DE (1) DE102005061410A1 (ja)
WO (1) WO2007073964A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023111032A1 (de) * 2021-12-15 2023-06-22 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Elektromagnetische vorrichtung, sowie verfahren zum herstellen einer solchen elektromagnetischen vorrichtung

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DE102005061424A1 (de) * 2005-12-22 2007-07-05 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006014020A1 (de) * 2006-01-17 2007-07-19 Robert Bosch Gmbh Polrohr
DE102011080355A1 (de) * 2011-08-03 2013-02-07 Robert Bosch Gmbh Kraftstoffeinspritzventil
EP2774157B1 (en) 2011-11-01 2021-09-08 Norgren GmbH Solenoid with an over-molded component
DE102012220860A1 (de) * 2012-06-29 2014-01-02 Robert Bosch Gmbh Kraftstoffinjektor mit Magnetaktor
DE102015226248A1 (de) * 2015-12-21 2017-06-22 Robert Bosch Gmbh Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
KR101904006B1 (ko) * 2016-09-21 2018-10-05 동방테크 주식회사 일체형 솔레노이드 밸브와 일체형 노즐을 가진 인젝터
DE102017207219A1 (de) * 2017-04-28 2018-10-31 Robert Bosch Gmbh Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
JP7251178B2 (ja) * 2019-02-04 2023-04-04 日本電産トーソク株式会社 ソレノイド装置
DE102019123517A1 (de) * 2019-09-03 2021-03-04 Thomas Magnete Gmbh Elektromagnet und Verfahren zur Herstellung desselben
DE102022211561A1 (de) 2022-11-02 2024-05-02 Robert Bosch Gesellschaft mit beschränkter Haftung Injektor mit verbesserter Magnetspule und Verfahren zur Herstellung einer Magnetspule

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Publication number Priority date Publication date Assignee Title
WO2023111032A1 (de) * 2021-12-15 2023-06-22 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Elektromagnetische vorrichtung, sowie verfahren zum herstellen einer solchen elektromagnetischen vorrichtung

Also Published As

Publication number Publication date
JP2009520148A (ja) 2009-05-21
EP1966483A1 (de) 2008-09-10
WO2007073964A1 (de) 2007-07-05
JP5039054B2 (ja) 2012-10-03
US8833678B2 (en) 2014-09-16
DE102005061410A1 (de) 2007-06-28
US20090134348A1 (en) 2009-05-28

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