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WO2015110199A1 - Procédé de fabrication d'une électrovanne - Google Patents

Procédé de fabrication d'une électrovanne Download PDF

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Publication number
WO2015110199A1
WO2015110199A1 PCT/EP2014/075286 EP2014075286W WO2015110199A1 WO 2015110199 A1 WO2015110199 A1 WO 2015110199A1 EP 2014075286 W EP2014075286 W EP 2014075286W WO 2015110199 A1 WO2015110199 A1 WO 2015110199A1
Authority
WO
WIPO (PCT)
Prior art keywords
base material
diffusion layer
solenoid valve
producing
nitrogen
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.)
Ceased
Application number
PCT/EP2014/075286
Other languages
German (de)
English (en)
Inventor
Christian Suenkel
Joerg Abel
Martin Buehner
Guido Pilgram
Thomas Sailer
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 WO2015110199A1 publication Critical patent/WO2015110199A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces
    • 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
    • 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
    • F02M61/166—Selection of particular materials
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F02M2200/9061—Special treatments for modifying the properties of metals used for fuel injection apparatus, e.g. modifying mechanical or electromagnetic properties

Definitions

  • the invention relates to a method for producing a solenoid valve according to the preamble of claim 1.
  • Solenoid valves in particular of injection valves, it is known that to increase the wear resistance to impact and rubbing wear the contact partners (armature and inner pole) with a
  • the invention enables the production of a nitrogen-hardened layer with low scattering over various batches of material with different chemical properties
  • Nitrogen is preferably used during the high pressure embroidering process (HT-N process) in a nitrogen atmosphere with 0.5-3.5 bar gauge - i. a nitrogen gas pressure equal to the sum of atmospheric pressure (1013.25 hectopascal) and gauge pressure - at holding temperatures between 1000 ° C and 1300 ° C in the base material - i. the first and second base material - diffused. Holding times and holding temperatures are to be chosen in particular such that the following properties are achieved:
  • the first and / or second base material has in the region of the first and / or second diffusion layer hardness between 550 HV (Vickers hardness) and 700 HV, and / or
  • a layer thickness of the first and / or second diffusion layer is between 100 microns and 250 microns, and / or
  • the structure of the first and / or second base material is not or only negligibly influenced, and / or
  • the magnet armature and / or magnetic core has a relatively high permeability in the first or second base material and in the first or
  • second diffusion layer - which is also referred to as edge layer - on, - in the HT-N process is a saturation induction relative to the
  • the first and / or second base material comprises a microstructure with a material - in particular stainless steels - which are in particular originally ferrite, preferably ideally ferromagnetic, set.
  • a material - in particular stainless steels - which are in particular originally ferrite, preferably ideally ferromagnetic, set.
  • According to the HT-N process is performed so that holding times and annealing temperatures (holding temperatures) are reduced with a high nitrogen supply at the same time.
  • Magnetic anchor and / or magnetic core (hard diffusion layer with at the same time little influence on the magnetic properties of the base material) is in a particularly advantageous manner, an adjustment of this
  • the magnet armature and / or magnetic core (inner pole) on a stainless steel material which in particular due to a predetermined range of variation of the chemical composition at temperatures beyond 1100 ° C has a comparatively strongly fluctuating austenite content. Accordingly, the possible martensite content and thus the saturation polarization, permeability and coercivity vary after freezing and tempering.
  • a magnetic saturation induction of the first diffusion layer is different from a magnetic saturation induction of the first basic body by less than 20%, preferably less than 10%, more preferably less than 1%, most preferably less than 0.1%, and / or or,
  • a magnetic saturation induction of the second diffusion layer is different from a magnetic saturation induction of the second basic body by less than 20%, preferably less than 10%, more preferably less than 1%, most preferably less than 0.1%, in particular the structure of the first and / or second base material ferritic, preferably ferromagnetic, particularly preferably ideal
  • ferromagnetic is set.
  • the adhesion resistance is not adversely affected in the inventive diffusion layer, since the diffusion layer does not grow, but in the core continuously "grows".
  • the holding time and / or holding temperature is controlled such that the first and / or second base material in the region of the first and / or second diffusion layer has a Vickers hardness between 100 HV and 800 HV, preferably between 400 HV and 750 HV, more preferably between 550 HV and 700 HV.
  • Solenoid valve provide.
  • the holding time and holding temperature are controlled such that the first and / or second diffusion layer has a layer thickness between 10
  • Micrometers and 500 microns preferably between 50 microns and 350 microns, more preferably between 100 microns and 250 microns, having.
  • nitrogen in the first and / or second base material at a nitrogen pressure between 0 bar and 5 bar, preferably between 0, 1 and 4 bar, more preferably between 0.5 bar and 3.5 bar and / or one
  • the quenching temperature preferably being 70 ° C
  • Frozen temperature is preferably between -90 ° C and -60 ° C
  • Tempering temperature is preferably between 180 ° C and 600 ° C. As a result, it is advantageously possible that the magnet armature is a martensitic
  • the ferromagnetic and in the boundary layer is martensitic.
  • the first and / or second base material are formed as stainless ferritic rods.
  • the first and / or second base material is alloyed with niobium and / or titanium.
  • Figures 1 and 2 are schematic views of a solenoid valve according to an embodiment of the present invention.
  • FIG. 1 shows schematically a sectional view of a solenoid valve 113 according to the present invention.
  • FIG. 2 schematically shows a
  • the solenoid valve 113 is in particular a fuel injection valve for liquid fuel.
  • the solenoid valve points a valve needle 110 and a return spring 114.
  • the magnet valve 113 is substantially rotationally symmetrical with respect to an axis 112.
  • a magnetically soft armature 106 (also referred to below as magnet armature 106) made of a ferromagnetic material is axially displaceably mounted and is called magnet coil 103 when the coil 103 is turned on ) by the resulting magnetic force of a soft magnetic inner pole 111 (hereinafter also referred to as magnetic core 111) tightened.
  • magnetic core 111 a soft magnetic inner pole 111
  • For a large magnetic force is to strive that the magnetic flux as completely as possible - for example, in Figure 2 shown - armature air gap 107 (between armature 106 and magnetic core 111) passes.
  • valve sleeve 105 (also referred to below as sleeve 105) in the region of the armature air gap 107 is provided with an annular groove (also referred to below as a groove or as a thin-wall region).
  • Thin wall region causes due to the small residual wall thickness (the sleeve 105), a reduction of the cross section of the valve sleeve 105, so that the magnetic flux almost completely in the armature air gap 107 and not unused in the sleeve 105 runs.
  • the valve sleeve 105 has the task to seal the interior against the environment.
  • the fuel pressure inside the sleeve 105 is generally much greater than the ambient pressure, so that the sleeve 105 is pressurized and must absorb high radial forces.
  • a first diffusion layer 108 is provided on the magnet armature 106 and / or that a second diffusion layer 109 is provided on the magnet core 111.
  • the first diffusion layer 108 and / or the second diffusion layer 109 are produced in a high-pressure embroidering process (HT-N process).
  • the first diffusion layer 108 and / or the second diffusion layer 109 has, in particular, a greater wear resistance than the base material of the magnet armature 106 and / or magnetic core 111, so that the longevity of the moving relative to one another and optimized for their magnetic properties elements (ie, the armature 106 and / or the magnetic core 111) can be increased in an advantageous manner.
  • valve needle 110 has an element 110 ', which in particular is firmly (i.e., in particular positively and / or non-positively and / or materially bonded) and thus not connected in a relatively movable manner to the base material of the valve needle 110.
  • the armature 106 is relatively displaceable (or relatively movable) parallel to the axial extent of the valve needle 110 (i.e.
  • Solenoid valve 113 (due to its relative movement with respect to the valve needle 110 and thus also with respect to the valve needle 110 connected to the element 110 ') at the frets, wherein in this
  • the second diffusion layer 109 is according to the invention in particular on
  • Magnetic core 111 is provided so as to cover the surface area of the magnetic core 111 opposite to the magnet armature 106 (that is, in this area covers the base material of the magnetic core 111). This area is also substantially perpendicular to the axial direction of valve needle 110 (i.e., perpendicular to axis 112). Furthermore, according to the invention, the second diffusion layer 109 is arranged in particular also in that region of the magnetic core 111, with respect to which the valve needle 110 (or an element moving with the valve needle) moves. In this area, the surface area of the magnetic core 111 is cylindrical and parallel to the axial direction of the valve needle 110.
  • the magnet armature 106 and / or the inner pole 111 is completely enveloped by the first or second diffusion layer 108, 109, wherein in particular the first and / or second diffusion layer forms everywhere where the component surface in
  • a layer only partially (i.e., not completely) enveloping the magnet armature 106 and / or inner pole 111 may be produced in a post-processing step.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une électrovanne, en particulier d'un injecteur de combustible, qui comprend une aiguille d'injecteur guidée de façon à pouvoir se déplacer dans le sens axial, un noyau magnétique, et une armature mobile disposée face au noyau magnétique dans le sens axial et montée sur l'aiguille d'injecteur. L'armature mobile comprend un premier matériau de base et le noyau magnétique comprend un deuxième matériau de base. Une première couche de diffusion est formée sur le premier matériau de base et/ou une deuxième couche de diffusion est formée sur le deuxième matériau de base par un procédé de nitruration sous haute pression (procédé HT‑N).
PCT/EP2014/075286 2014-01-22 2014-11-21 Procédé de fabrication d'une électrovanne Ceased WO2015110199A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014201097.7 2014-01-22
DE102014201097.7A DE102014201097A1 (de) 2014-01-22 2014-01-22 Verfahren zur Herstellung eines Magnetventils

Publications (1)

Publication Number Publication Date
WO2015110199A1 true WO2015110199A1 (fr) 2015-07-30

Family

ID=51932360

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/075286 Ceased WO2015110199A1 (fr) 2014-01-22 2014-11-21 Procédé de fabrication d'une électrovanne

Country Status (2)

Country Link
DE (1) DE102014201097A1 (fr)
WO (1) WO2015110199A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017102144A1 (fr) * 2015-12-17 2017-06-22 Robert Bosch Gmbh Soupape, notamment soupape d'aspiration, dans une pompe haute pression d'un système d'injection de carburant
JP2021531408A (ja) * 2018-07-20 2021-11-18 ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングRobert Bosch Gmbh 窒素含有保護層を有する鋼製部材の製造方法およびそれに対応して製造された部材

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017202300A1 (de) * 2017-02-14 2018-08-16 Robert Bosch Gmbh Magnetanker und Verfahren zum Herstellen eines Magnetankers

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0345771A2 (fr) * 1988-06-08 1989-12-13 Hitachi, Ltd. Soupape d'injection de combustible à commande électromagnétique
DE4033706A1 (de) * 1990-10-24 1991-02-21 Hans Prof Dr Ing Berns Einsatzhaerten mit stickstoff zur verbesserung des korrosionswiderstandes martensitischer nichtrostender staehle
US5732888A (en) * 1993-12-09 1998-03-31 Robert Bosch Gmbh Electromagnetically operable valve
FR2794168A1 (fr) * 1999-05-31 2000-12-01 Nippon Piston Ring Co Ltd Systeme formant une soupape pour moteur a combustion interne et agencement de soupapes
US20010035164A1 (en) * 1999-10-15 2001-11-01 Irawan Rahardja Directly actuated injection valve with a composite needle
DE102004039926A1 (de) * 2004-08-18 2006-02-23 Robert Bosch Gmbh Verfahren zur Herstellung eines temperatur- und korrosionsbeständigen Kraftstoffinjektorkörpers
EP2034038A2 (fr) * 2007-08-17 2009-03-11 Robert Bosch GmbH Procédé de fabrication d'une couche de protection contre l'usure sur un composant magnétique mou
EP2378106A1 (fr) * 2010-04-13 2011-10-19 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
DE102011077179A1 (de) * 2011-06-08 2012-12-13 Robert Bosch Gmbh Anker für ein Magnetventil und Verfahren zur Herstellung eines Ankers

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0345771A2 (fr) * 1988-06-08 1989-12-13 Hitachi, Ltd. Soupape d'injection de combustible à commande électromagnétique
DE4033706A1 (de) * 1990-10-24 1991-02-21 Hans Prof Dr Ing Berns Einsatzhaerten mit stickstoff zur verbesserung des korrosionswiderstandes martensitischer nichtrostender staehle
US5732888A (en) * 1993-12-09 1998-03-31 Robert Bosch Gmbh Electromagnetically operable valve
FR2794168A1 (fr) * 1999-05-31 2000-12-01 Nippon Piston Ring Co Ltd Systeme formant une soupape pour moteur a combustion interne et agencement de soupapes
US20010035164A1 (en) * 1999-10-15 2001-11-01 Irawan Rahardja Directly actuated injection valve with a composite needle
DE102004039926A1 (de) * 2004-08-18 2006-02-23 Robert Bosch Gmbh Verfahren zur Herstellung eines temperatur- und korrosionsbeständigen Kraftstoffinjektorkörpers
EP2034038A2 (fr) * 2007-08-17 2009-03-11 Robert Bosch GmbH Procédé de fabrication d'une couche de protection contre l'usure sur un composant magnétique mou
EP2378106A1 (fr) * 2010-04-13 2011-10-19 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
DE102011077179A1 (de) * 2011-06-08 2012-12-13 Robert Bosch Gmbh Anker für ein Magnetventil und Verfahren zur Herstellung eines Ankers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017102144A1 (fr) * 2015-12-17 2017-06-22 Robert Bosch Gmbh Soupape, notamment soupape d'aspiration, dans une pompe haute pression d'un système d'injection de carburant
CN108368814A (zh) * 2015-12-17 2018-08-03 罗伯特·博世有限公司 燃料喷射系统的高压泵中的阀、尤其抽吸阀
CN108368814B (zh) * 2015-12-17 2020-10-30 罗伯特·博世有限公司 燃料喷射系统的高压泵中的阀、尤其抽吸阀
US11300087B2 (en) 2015-12-17 2022-04-12 Robert Bosch Gmbh Valve, in particular a suction valve, in a high-pressure pump of a fuel injection system
JP2021531408A (ja) * 2018-07-20 2021-11-18 ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングRobert Bosch Gmbh 窒素含有保護層を有する鋼製部材の製造方法およびそれに対応して製造された部材
JP7297863B2 (ja) 2018-07-20 2023-06-26 ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング 窒素含有保護層を有する鋼製部材の製造方法およびそれに対応して製造された部材

Also Published As

Publication number Publication date
DE102014201097A1 (de) 2015-07-23

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