EP1825135B1 - Einspritzventil - Google Patents

Einspritzventil Download PDF

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Publication number
EP1825135B1
EP1825135B1 EP05801392.1A EP05801392A EP1825135B1 EP 1825135 B1 EP1825135 B1 EP 1825135B1 EP 05801392 A EP05801392 A EP 05801392A EP 1825135 B1 EP1825135 B1 EP 1825135B1
Authority
EP
European Patent Office
Prior art keywords
pot
carrier
coil
magnet
electromagnet
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
EP05801392.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1825135A1 (de
Inventor
Martin Scheffel
Andreas Glaser
Jens Pohlmann
Thomas Gerschwitz
Christina Gerescher
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 EP1825135A1 publication Critical patent/EP1825135A1/de
Application granted granted Critical
Publication of EP1825135B1 publication Critical patent/EP1825135B1/de
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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
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/505—Adjusting spring tension by sliding spring seats
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making
    • Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making

Definitions

  • the invention relates to an injection valve, in particular for fuel injection systems of internal combustion engines in motor vehicles, according to the preamble of claim 1.
  • solenoid In a known injection valve of the magnetic pot with Spulentragerund wound thereon solenoid is pushed onto the sleeve-shaped housing portion and placed with its pot opening on a lower housing part which defines a valve seat carrier on the sleeve-shaped housing portion.
  • the bobbin is sitting with the inner cylinder wall of its carrier body directly on the sleeve-shaped housing portion and is surrounded by the pot wall of the magnet pot with air clearance.
  • the magnet pot has a pot socket which continues axially on the bottom of the pot and is integral with the bottom of the pot and which surrounds the sleeve-shaped housing part. Outside on the spigot is a circumferential labyrinth pierced by machining.
  • a second labyrinth is introduced by machining on the sleeve-shaped housing part.
  • the sleeve-shaped housing portion and the pot socket are enveloped by a plastic extrusion, on which a plug for connecting the solenoid to a mating connector is formed. Due to the two labyrinths on which the plastic is shrunk, the magnetic coil is sealed against environmental influences, so that under certain environmental conditions forming salt mist does not occur at the transition points between the plastic of the plastic injection and the metal of the sleeve-shaped housing part and along the metallic walls to the Solenoid reach and can cause electrical damage there. Since the labyrinths can only be produced by machining, the production of these labyrinths is very costly, which is not negligibly reflected in the manufacturing costs of the injection valve.
  • an injection valve in particular for fuel injection systems of internal combustion engines in motor vehicles, known which comprises a sleeve-shaped housing portion exhibiting valve housing and arranged on the housing portion electromagnet.
  • the electromagnet comprises a coil carrier with a carrier body and these front side limiting carrier flanges and a wound on the carrier body magnetic coil.
  • the injection valve has a magnetic cup receiving the coil carrier as outer pole of the electromagnet with a pot wall and a one-piece, the housing portion with a bottom opening enclosing the pot bottom.
  • the intermediate space between the inner wall of the pot wall of the magnet pot and the outer circumference of the magnet coil is filled with an annular plastic web which is part of a plastic extrusion and merges into an electrical connector on the axial side opposite the annular plastic web.
  • the plastic extrusion is thereby both completely independent of the bobbin produced and mounted.
  • the magnetic coil is a preassembled module, which consists of the coil carrier and the actual winding of the solenoid. Only after the assembly of this assembly on the valve housing, the filling of the above-mentioned gap can be made around the solenoid with a plastic injection molding machine.
  • an injection valve in particular for fuel injection systems of internal combustion engines in motor vehicles, known which comprises a sleeve-shaped housing portion exhibiting valve housing and arranged on the housing portion electromagnet.
  • the electromagnet comprises a coil carrier with a carrier body and these front side limiting carrier flanges and a wound on the carrier body magnetic coil.
  • the injection valve has a coil carrier receiving two-part magnet pot as outer pole of the electromagnet with a U-shaped yoke and a housing portion enclosing a bottom opening bottom part.
  • the coil carrier with wound magnetic coil is on all sides completely enclosed by a one-piece plastic sheath, so that it is virtually encapsulated in the plastic completely.
  • JP 2002-4013 A is already an injection valve, in particular for fuel injection systems of internal combustion engines in motor vehicles, having a sleeve-shaped housing portion having a valve housing and a disposed on the housing portion electromagnet, a coil carrier with carrier body and this end face limiting carrier flanges, wound on the carrier body and a coil bobbin receiving magnetic pot with pot wall and thus one-piece, the housing portion having a bottom opening enclosing pot bottom, known.
  • the bobbin is arranged in the magnet pot so that the remote from the magnet coil inner wall of the support body is pushed onto the housing portion, wherein the bobbin is wound with wound magnetic coil with a one-piece plastic jacket, the the pot wall of the magnet pot facing lateral surface of the magnet coil and carrier flanges and at least The covered from the bottom of the pot carrier flange covered.
  • the magnet pot engages with its bottom of the pot, the coil carrier immediately adjacent to its lower support flange, and the plastic jacket extends to the pot wall of the magnet pot facing lateral surface to the bottom of the pot, where it rests.
  • the injection valve according to the invention with the features of claim 1 or the features of claim 2 has the advantage that an equally good seal of the solenoid is achieved against damaging environmental influences with a lower manufacturing cost.
  • the injection valves with the features of claim 2 have the additional advantage that the outer diameter of the electromagnet can be kept smaller with the same magnetic power.
  • the formed on the bobbin labyrinth in the injector according to claim 2 is easy to manufacture manufacturing technology and is formed in the manufacture of the bobbin same with.
  • the magnet pot, the coil support carrying the magnetic coil in the magnet cup, the coil integrated in the plastic jacket for closing the magnetic circuit and the plug molded onto the plastic jacket for contacting the magnet coil form a prefabricated mounting unit.
  • This mounting unit can be manufactured and delivered outside the assembly line for the injection valve, for example by a supplier.
  • the cycle time required for the injection molding of the plastic sheath is not coupled to the cycle time within the assembly line of the injection valve.
  • FIG. 1 In longitudinal section of a section schematically sketched injection valve is preferably used in fuel injection systems of internal combustion engines in motor vehicles. It has a valve housing 11 with a thin-walled, sleeve-shaped, upper housing portion 12, whose free end forms a connecting piece 34 for the fuel inlet, and a integrally connected thereto, the lower housing portion 13 which is formed as a valve seat carrier with valve opening. Alternatively, the valve seat carrier can also be used as a separate component in the lower housing section 13.
  • the connecting piece 34 encloses a fuel inlet channel 36, which is closed with a fuel filter 34 and continues through the lower housing portion 13 up to the valve opening.
  • an electromagnet 14 is arranged on the sleeve-shaped, upper housing portion 12.
  • the electromagnet 14 consists of a coil support 15, a magnetic coil wound thereon 16, a magnetic pot 17, in which the coil carrier 15 is received, and a sleeve-shaped magnetic core 18, which serves to reduce the magnetic resistance and the formation of an air gap to a magnetic armature 19 in the magnetic circuit the electromagnet 14 is inserted into the sleeve-shaped, thin-walled, upper housing portion 12 and fixed therein.
  • the magnet armature 19 opposite the magnetic core 18 with an axial gap spacing is displaceably guided in the valve housing 11 and fixedly connected to a valve needle 20.
  • a valve closing spring 37 is arranged, which is supported on the valve needle 20 and a pressed-in in the magnetic core 18 adjusting sleeve 38 and presses the valve needle 20 with its valve head on the valve seat in the valve seat carrier.
  • the magnitude of the spring force of the valve closing spring 37 is determined by the Einpresstiefe the adjusting sleeve 28.
  • the bobbin 15 has a hollow-cylindrical carrier body 151 and two carrier flanges 152 delimiting the carrier body 151 at the end.
  • the magnetic coil 16 is wound onto the carrier body 151 and fixed axially by the carrier flanges 152.
  • an axially projecting labyrinth 23 is formed in each case, which consists of a plurality of concentric webs 231.
  • an insulating dome 24 is still formed, which encloses two electrical connection pins 25 for the magnetic coil 16.
  • the pins 25 are led out of this at the free end of the insulating dome 24 and formed for contacting with contact sockets 26 of a connector plug 27.
  • a spacer 28 is formed, which produces a defined axial distance of the bobbin 15 to the pot bottom 172 of the magnet pot 17.
  • the labyrinths 23, the spacer 28 and the Isolierdom 24 are formed in the manufacturing process of the existing plastic coil carrier 15 equal with.
  • the bobbin 15 with magnetic coil 16 is arranged in the magnet pot 17 so that the remote from the magnetic coil 16 inner wall of the support body 151 on the sleeve-shaped, upper housing portion 12 is directly pushed.
  • the bobbin 15 is at a radial distance from the pot wall 171 and with a distance from the spacer 28 predetermined axial distance from the pot bottom 172 in the magnet pot 17 a.
  • the space between coil support 15 with wound magnetic coil 16 and the magnet pot 17 is injected with plastic, which also covers the upper support flange 152, so that the coil support 15 is enclosed by a up to the sleeve-shaped upper housing portion 12 reaching plastic jacket 29.
  • the yoke 22 When injecting the bobbin 15 on the one hand, the yoke 22 is integrated into the plastic jacket 29 and on the other hand, a plug 30 integrally formed on the plastic jacket 29 with.
  • the plug 30 has a freely tapered at its free end recess 31 and serves for pushing the connector 27.
  • the recess 31 is formed so that the Isolierdom 24 something in the recess 31 protrudes beyond the bottom outward
  • the contact bushes 26 of the connector plug 27 push out of the Isolierdom 24th projecting pins 25 on.
  • the plastic shrinks onto the labyrinths 23 on the carrier flanges 152 and seals the magnetic coil 16 with respect to the sleeve-shaped, upper housing section 12.
  • the fact that the insulating dome 24 projects substantially beyond the bottom of the recess 31 in the plug 30 also prevents the salt mist from reaching the magnetic coil 16 via the magnetic coil connection.
  • the Isolierdom 24 may alternatively end in front of the recess 31 of the plug 30.
  • the insulating dome 24 is provided with a circumferential labyrinth 32.
  • the labyrinth 32 is formed by three annular webs 321, which protrude radially from the insulating dome 24 at an axial distance from one another.
  • the electromagnet 14 described above with the magnet pot 17, the coil support 15 which is embedded in the magnet cup 17 by means of the plastic jacket 29 and carries the magnet coil 16, the yoke 22 integrated in the plastic jacket 29 and the plug 30 integrally formed on the plastic jacket 29 forms a prefabricated assembly unit. which is completely pushed onto the sleeve-shaped, upper housing portion 12 of the injection valve during assembly of the injection valve. Subsequently, a plastic extrusion 33 is applied to the plastic jacket 29 on the upper side facing away from the bottom of the pot 172, which encloses the connecting piece 34.
  • Fig. 3 is another embodiment of the injection valve according to Fig. 1 used electromagnet 14 shown.
  • This embodiment differs from that Fig. 1 Electromagnet 14 described by the fact that the coil carrier 15 is fully enclosed with magnetic coil 16 of a one-piece plastic jacket 39, so is virtually encapsulated in the plastic.
  • the labyrinths on the carrier flanges 152 and on the labyrinth on the insulating dome 24 can be dispensed with.
  • the bobbin 15 is arranged in the magnetic pot 17 so that the remote from the magnetic coil 16 inner wall of the support body 151 on the sleeve-shaped upper housing portion 12 can be pushed.
  • the bobbin 15 is in turn received at a radial distance from the pot wall 171 in the magnet pot 17 and lies with its lower support flange 152 on the pot bottom 172.
  • plastic that covers the remote from the bottom 172 pot flange 152 up to the housing portion 12 and a plastic jacket 42 forms around the bobbin 15.
  • the plastic is matched to the material of the bobbin 15 and the spray parameters of the plastic, such as temperature and injection pressure, chosen so that the plastic and the material of the bobbin 15 at the contact surfaces 43, 44 intimately connect to each other, so that in turn Magnet coil 16 is sealed relative to the interface between the carrier body 151 and sleeve-shaped housing portion 12.
  • the prefabricated mounting unit is carried out without magnetic pot 17 and this then from coil element 15, with magnetic coil 16, plastic jacket 29, 39 and 42 with integrated yoke 22 and molded connector 30 existing assembly unit in the assembly line of the injector inserted into the magnet pot 17 , Furthermore, even the yoke 22 can be removed from the mounting unit and placed as a separate component in the assembly of the injector to the pot opening of the mounting cup 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fuel-Injection Apparatus (AREA)
EP05801392.1A 2004-12-06 2005-10-05 Einspritzventil Active EP1825135B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004058677A DE102004058677A1 (de) 2004-12-06 2004-12-06 Einspritzventil
PCT/EP2005/055008 WO2006061269A1 (de) 2004-12-06 2005-10-05 Einspritzventil

Publications (2)

Publication Number Publication Date
EP1825135A1 EP1825135A1 (de) 2007-08-29
EP1825135B1 true EP1825135B1 (de) 2016-12-14

Family

ID=35520143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05801392.1A Active EP1825135B1 (de) 2004-12-06 2005-10-05 Einspritzventil

Country Status (6)

Country Link
US (1) US7637443B2 (zh)
EP (1) EP1825135B1 (zh)
JP (1) JP4571985B2 (zh)
CN (2) CN102003318B (zh)
DE (1) DE102004058677A1 (zh)
WO (1) WO2006061269A1 (zh)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005052255B4 (de) * 2005-11-02 2020-12-17 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006025343A1 (de) * 2006-03-22 2007-09-27 Robert Bosch Gmbh Magnetspule
US8387599B2 (en) 2008-01-07 2013-03-05 Mcalister Technologies, Llc Methods and systems for reducing the formation of oxides of nitrogen during combustion in engines
US8561598B2 (en) * 2008-01-07 2013-10-22 Mcalister Technologies, Llc Method and system of thermochemical regeneration to provide oxygenated fuel, for example, with fuel-cooled fuel injectors
CN101539084B (zh) * 2009-03-20 2010-12-29 天津大学 共轨式电控喷射器
DE102009002128A1 (de) * 2009-04-02 2010-10-14 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
DE102010031277A1 (de) 2010-07-13 2012-01-19 Robert Bosch Gmbh Kraftstoffeinspritzventil mit reduzierter Bauteileanzahl
BRPI1005341B1 (pt) * 2010-12-02 2016-12-20 Bosch Do Brasil galeria de combustível de material plástico com sistema de aquecimento
US9115325B2 (en) 2012-11-12 2015-08-25 Mcalister Technologies, Llc Systems and methods for utilizing alcohol fuels
DE202013003049U1 (de) * 2013-04-03 2013-05-06 Bürkert Werke GmbH Magnetventil, Batterie aus Magnetventilen sowie Werkzeug
DE102015226068A1 (de) * 2015-12-18 2017-06-22 Robert Bosch Gmbh Magnetspulenanordnung und Magnetventil

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487199A1 (en) * 1990-11-19 1992-05-27 Ford Motor Company Limited A fuel injector
JP2002004013A (ja) * 2000-06-16 2002-01-09 Keihin Corp 電磁弁用コア

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4643359A (en) * 1985-03-19 1987-02-17 Allied Corporation Mini injector valve
DE4003229A1 (de) * 1990-02-03 1991-08-08 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE4310719C2 (de) * 1993-04-01 2002-09-12 Bosch Gmbh Robert Verfahren zur Herstellung eines Magnetkreises für ein Ventil
DE4421429A1 (de) * 1994-06-18 1995-12-21 Bosch Gmbh Robert Elektromagnetisch betätigbares Brennstoffeinspritzventil
DE19547406B4 (de) 1995-12-19 2007-10-31 Robert Bosch Gmbh Brennstoffeinspritzventil
DE19833461A1 (de) * 1998-07-24 2000-01-27 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
JP4082929B2 (ja) * 2002-05-21 2008-04-30 株式会社日立製作所 燃料噴射弁
DE10246230A1 (de) * 2002-10-04 2004-04-29 Robert Bosch Gmbh Einspritzventil und Verfahren zu dessen Herstellung
DE102004025079A1 (de) * 2004-05-21 2005-12-08 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004033280A1 (de) * 2004-07-09 2006-02-02 Robert Bosch Gmbh Einspritzventil zur Kraftstoffeinspritzung
DE102004047041B4 (de) * 2004-09-28 2017-06-14 Robert Bosch Gmbh Brennstoffeinspritzventil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487199A1 (en) * 1990-11-19 1992-05-27 Ford Motor Company Limited A fuel injector
JP2002004013A (ja) * 2000-06-16 2002-01-09 Keihin Corp 電磁弁用コア

Also Published As

Publication number Publication date
CN101072941A (zh) 2007-11-14
US20080035116A1 (en) 2008-02-14
CN102003318A (zh) 2011-04-06
JP2008522094A (ja) 2008-06-26
JP4571985B2 (ja) 2010-10-27
CN102003318B (zh) 2013-11-13
US7637443B2 (en) 2009-12-29
DE102004058677A1 (de) 2006-06-14
EP1825135A1 (de) 2007-08-29
WO2006061269A1 (de) 2006-06-15
CN101072941B (zh) 2011-12-28

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