Classifications

• • 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
  • H01F7/081—Magnetic constructions
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
  • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
  • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
  • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
  • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
  • H01F1/16—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
• • 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
  • H01F7/081—Magnetic constructions
  • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material
• • 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
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/12—All metal or with adjacent metals
  • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]

Definitions

• the invention is based on a metal composite component, in particular for an electromagnetic valve according to the preamble of the main claim.
• This inner valve tube is formed from an inlet port forming an inner pole, a non-magnetic intermediate part and a valve seat carrier receiving a valve seat and explained in more detail in the description of FIG.
• a valve housing made in this way can e.g. used in solenoid valves for anti-lock braking systems (ABS) of motor vehicles.
• DE 42 37 405 C2 discloses methods for producing a solid core for injection valves for internal combustion engines (FIG. 5 of the document).
• the Methods are characterized by providing, directly or through prior conversion processes, a one-piece sleeve-shaped magnetic martensitic workpiece which undergoes a local heat treatment in a central portion of the magnetic martensitic workpiece to convert that middle portion into a non-magnetic, austenitic center portion.
• molten austenite-forming elements are added to the site of the heat treatment to form a nonmagnetic austenitic central portion of the solid core.
• the metallic composite component according to the invention with the characterizing features of the main claim has the advantage that in a particularly simple and cost-effective manner, a magnetic separation on a one-piece, sleeve-shaped composite component is realized, which can be reliably produced mass-production technology.
• the composite component is characterized in that there are at least two adjacent sections of different magnetization, wherein the magnetic choke formed in the composite component by the second section with reduced saturation polarization J s compared to the first sections is advantageously non-magnetic, but partially magnetic in the order of magnitude ideally allows the use of such a composite component in an electromagnetic valve.
• a semi-austenitic stainless steel such as 17-7PH or 15-8PH is used as the starting material for the composite component.
• the material is magnetized.
• a local heat treatment by laser beam, induction heating or Electron radiation or the like made, which leads to the fact that after cooling, the second section is formed with reduced saturation polarization.
• FIG. 1 shows a fuel injection valve according to the prior art with a three-part inner metal valve tube as a housing
• Figure 2 shows a first composite component according to the invention consisting of three sections
• Figure 3 shows a second composite component according to the invention consisting of three sections
• Figure 4 is a schematic section of an injection valve with a composite component according to the invention to illustrate a possible use.
• the electromagnetically operable valve in the form of an injector for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines has a tubular core 2 surrounded by a magnetic coil 1 serving as a fuel inlet nozzle and inner pole, which has a constant outer diameter over its entire length, for example.
• 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 by welding and surrounds the core end 9 partially axially.
• a tubular valve seat support 16 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.
• an axially movable valve needle 18 is arranged in the valve seat carrier 16.
• At the downstream end 23 of the valve needle 18 is a - A -
• spherical valve closing body 24 is provided, on the circumference, for example, five flats 25 are provided for flowing past the fuel.
• the actuation of the injection valve takes place in a known manner electromagnetically.
• the electromagnetic circuit with the solenoid coil 1, the core 2 and an armature 27.
• the tubular armature 27 is facing away with a valve closing body 24 End of the valve needle 18 firmly connected by, for example, a weld and aligned with the core 2.
• the core 2 opposite end of the
• Valve seat support 16 is a cylindrical valve seat body 29 having a fixed valve seat 30, mounted by welding tight.
• the spherical valve closing body 24 of the valve needle 18 cooperates with the valve seat 30 of the valve seat body 29, which tapers frustoconically in the flow direction.
• At its lower end face of the valve seat body 29 with an example cup-shaped spray orifice plate 34 is solid and tight by a z. B. connected by means of a laser weld.
• In the spray perforated disk 34 at least one, for example, four ejection openings 39 formed by eroding or punching are provided.
• the magnetic coil 1 of at least one, for example, designed as a bracket and serving as a ferromagnetic element guide element Surrounded surrounding the solenoid coil 1 in the circumferential direction at least partially and with its one end to the core 2 and its other end rests against the valve seat carrier 16 and with these z. B. is connected by welding, soldering or gluing.
• valve tube as a backbone and thus also housings of the fuel injection valve form the core 2, the nonmagnetic intermediate part 12 and the valve seat carrier 16, which are firmly connected to each other and extend over the entire length of the fuel injection valve. All other functional groups of the valve are arranged inside or around the valve tube.
• the valve tube is the classic three-part construction of a housing for an electromagnetically actuated unit, such as a valve, with two ferromagnetic or magnetizable housing areas, the effective Line of the magnetic circuit lines in the region of the armature 27 are magnetically separated from each other by means of a non-magnetic intermediate part 12 or at least connected to each other via a magnetic throttle point.
• the injection valve is largely surrounded by a plastic extrusion coating 51, which extends from the core 2 in the axial direction via the magnetic coil 1 and the at least one guide element 45 to the valve seat carrier 16, wherein the at least one guide element 45 is completely covered axially and in the circumferential direction.
• a mitangespritzter electrical connector 52 belongs to this plastic extrusion 51.
• FIG. 2 shows a composite component 60 according to the invention consisting of three sections 61, 62, 61. It is essential in this composite component 60, however, that at least one section 61 which is readily magnetizable is provided, to which a second section 62 with partially reduced saturation polarization J s is directly integrally formed followed.
• the at least one section 62 with reduced saturation polarization J s has a minimum saturation polarization J s of 0.1 T to 1.3 T and / or a maximum relative permeability ⁇ r of 2 to 150.
• a semi-austenitic stainless steel e.g., 17-7PH, 15-8PH
• a single or multiple heat treatment optionally with a deep-freeze or by the shaping of e.g. in a sleeve shape, possibly with a freezing, the material is made magnetic.
• a local heat treatment by laser beam, induction heating or electron radiation o.a. made, which leads to the fact that after cooling of the semi-magnetic portion 62 is formed.
• the material in the magnetic section 61 or in both magnetic sections 61 is characterized in that it has a saturation polarization J s of 0.8 T to 1.5 T with a retained austenite content of 0 to 50%.
• the material in section 62 takes with partially reduced saturation polarization J s J s a saturation of at least 0.1 T at a content of ferrite or martensite of> 0.
• the composite component 60 ' is slightly modified. It is essential with this composite component 60 'that at least one section 61' with partially reduced saturation polarization J s is provided, directly integrally connected to a second section 62 'with even more reduced saturation polarization J s .
• the second section 62 'with even more reduced saturation polarization J s has a
• a semi-austenitic stainless steel (e.g., 17-7PH, 15-8PH) is also used here.
• the material is made magnetic.
• the material in the two sections 61 'with partially reduced saturation polarization J s is characterized in that it has a saturation polarization J s of 0.8 T to 1.5 T with a retained austenite content of> 0.
• the material in the section 62 'with even more reduced saturation polarization J s assumes a saturation J s of at least 0.1 T with a ferrite or martensite content of> 0.
• the magnetic throttle formed in the composite component 60, 60 'by the sections 62, 62' with a reduced saturation polarization J s compared with the sections 61, 61 ' is advantageously not nonmagnetic in this respect, but partially magnetic in one
• Figure 4 shows a schematic section of a fuel injection valve with a composite component according to the invention 60, 60 ', which is installed as a thin-walled sleeve in the valve and thereby surrounds the core 2 and the armature 27 radially and circumferentially and is itself surrounded by the magnetic coil 1.
• the middle section 62 of the composite component 60 lies in the axial extension region of a working air gap 70 between the core 2 and the armature 27 in order to guide the magnetic circuit lines optimally and effectively in the magnetic circuit.
• the outer magnetic circuit component is, for example, as Magnet cup 46 executed, wherein the magnetic circuit between the magnetic pot 46 and the housing 66 is closed by a cover member 47.
• the metallic composite component 60 can be used not only as a valve sleeve in an electromagnetic valve, but also, for example, as a core 2.
• the invention is by no means limited to use in fuel injection valves or solenoid valves for anti-lock braking systems, but relates to all electromagnetically actuated valves of different application areas and generally all solid housing in units in which zones of different magnetism are sequentially required.
• the composite component 60, 60 'according to the invention can be produced not only with three successive sections, but also with more than three sections.

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Fuel-Injection Apparatus (AREA)
• Magnetically Actuated Valves (AREA)
• Electromagnets (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=41211854

Family Applications (1)

Country Status (8)

Families Citing this family (10)

Family Cites Families (18)

• 2008
  • 2008-07-18 DE DE102008040545A patent/DE102008040545A1/de not_active Withdrawn
• 2009
  • 2009-07-17 CN CN200980128180.9A patent/CN102099875B/zh not_active Expired - Fee Related
  • 2009-07-17 AT AT09780754T patent/ATE557403T1/de active
  • 2009-07-17 JP JP2011517945A patent/JP5399486B2/ja not_active Expired - Fee Related
  • 2009-07-17 ES ES09780754T patent/ES2383733T3/es active Active
  • 2009-07-17 EP EP09780754A patent/EP2313896B1/fr not_active Not-in-force
  • 2009-07-17 US US12/737,488 patent/US8851450B2/en not_active Expired - Fee Related
  • 2009-07-17 WO PCT/EP2009/059206 patent/WO2010007153A2/fr not_active Ceased

Non-Patent Citations (1)

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