EP1062421A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1062421A1
EP1062421A1 EP99955826A EP99955826A EP1062421A1 EP 1062421 A1 EP1062421 A1 EP 1062421A1 EP 99955826 A EP99955826 A EP 99955826A EP 99955826 A EP99955826 A EP 99955826A EP 1062421 A1 EP1062421 A1 EP 1062421A1
Authority
EP
European Patent Office
Prior art keywords
valve
inner pole
sleeve
fuel injection
core
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.)
Granted
Application number
EP99955826A
Other languages
German (de)
English (en)
Other versions
EP1062421B1 (fr
Inventor
Klaus Noller
Peter Asslaender
Hubert Stier
Hans Weidler
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 EP1062421A1 publication Critical patent/EP1062421A1/fr
Application granted granted Critical
Publication of EP1062421B1 publication Critical patent/EP1062421B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • 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
    • 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
    • Y10T29/49428—Gas and water specific plumbing component making
    • Y10T29/49432—Nozzle making
    • Y10T29/49433—Sprayer

Definitions

  • the invention relates to a fuel injector according to the preamble of claim 1.
  • an electromagnetically actuated fuel injection valve which, among other things, has a non-magnetic sleeve as a connecting part between a core and a valve seat body. With its two axial ends, the sleeve is firmly connected to the core and to the valve seat body. The sleeve runs over its entire axial length with a constant outside diameter and a constant inside diameter and accordingly has inlet openings of the same size at both ends.
  • the core and the valve seat body are designed with an outer diameter such that they extend into the sleeve at the two ends, so that the sleeve completely surrounds the two components core and valve seat body in these protruding areas.
  • a valve needle with an armature moves in the axial direction, which is guided through the sleeve.
  • the fixed connections of the sleeve to the core and the valve seat body are, for. B. achieved by welding. With The volume and weight of the fuel injector can be reduced with the help of the tubular sleeve.
  • a fuel injector which has an elongated, thin-walled, non-magnetic sleeve which, in addition to its jacket section, also has a bottom section.
  • the bottom section runs largely perpendicular to the otherwise axial extension of the sleeve along the longitudinal axis of the valve.
  • A can be in a through opening of the sleeve
  • a valve closing body which is fixedly connected to the valve needle interacts with a valve seat surface provided on a valve seat body, the valve seat body being pressed into the sleeve and directly or indirectly abutting the bottom portion of the sleeve with a perforated disk.
  • a tubular core serving as an inner pole is arranged in the through opening of the sleeve and is designed as a turned part. The core is firmly connected to the sleeve in a desired position by welding.
  • a similar arrangement of a tubular core in a valve sleeve is also known from DE-OS 197 12 590.
  • Magnetic cores for fuel injectors are produced by machining surface removal, with turning, milling, drilling and finishing steps being the known methods for producing these magnetic cores.
  • the fuel injector according to the invention with the characterizing features of claim 1 has the advantage that it can be manufactured in a very simple manner is mountable. Rolling or bending is a comparatively simple and inexpensive manufacturing process with relatively little material.
  • the inner pole is advantageously produced from a simple metallic strip.
  • the strip results in an axially running longitudinal slot on the inner pole, which in turn results in a reduction in the eddy currents, as a result of which a higher efficiency of the magnetic circuit is achieved.
  • the assembly of the inner pole in the valve sleeve and the stroke adjustment with the help of the inner pole are significantly simplified.
  • the inner pole After rolling or bending, the inner pole is on the one hand from the outset under a radial preload, which allows the inner pole to be simply fixed in the valve sleeve.
  • the size of the inner pole can be changed radially due to its longitudinal slot, so that burr formation is advantageously avoided when the inner pole is inserted into the valve sleeve.
  • the inner pole can also be moved correspondingly simply for adjusting the stroke of a valve needle in the valve sleeve using an adjusting tool.
  • the valve sleeve advantageously has a shoulder near the inner pole, on which an adjusting tool can act as well as on the inner pole.
  • FIG. 1 shows a fuel injection valve with an inner pole according to the invention
  • FIG. 2 shows the valve assembly having the inner pole on a changed scale
  • FIG. 3 shows a plan view of the inner pole.
  • the electromagnetically actuated valve according to the invention in the form of an injection valve for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines has a tubular core 2 surrounded by a magnet coil 1, serving as an inner pole and partly as a fuel flow , sleeve-shaped and stepped, z.
  • the magnet coil 1, the core 2 and the valve jacket 5 together form an electrically excitable actuating element.
  • the core 2 is introduced into an inner opening 11 of the valve sleeve 6, which is concentric with a longitudinal axis 10 of the valve.
  • the ferritic valve sleeve 6, for example, is elongated and thin-walled and has a jacket section 12 and a bottom section 13, the jacket section 12 in the circumferential direction and the bottom section 13 in the axial direction at its downstream end opening 11 limit.
  • the opening 11 also serves as a guide opening for a valve needle 14 that is axially movable along the longitudinal axis 10 of the valve.
  • valve seat body 15 which e.g. sits on the bottom section 13 of the valve sleeve 6 and has a fixed valve seat surface 16 as a valve seat.
  • the valve needle 14 is formed, for example, by a tubular anchor section 17, a likewise tubular needle section 18 and a spherical valve closing body 19, the
  • Valve closing body 19 e.g. is firmly connected to the needle section 18 by means of a weld seam.
  • On the downstream end of the valve seat body 15 is, for. B. in a frustoconical recess 20 a flat spray washer 21 is arranged, the fixed connection of valve seat body 15 and spray orifice plate 21 z. B. is realized by a circumferential dense weld.
  • One or more transverse openings 22 are provided in the needle section 18 of the valve needle 14, so that fuel flowing through the armature section 17 in an inner longitudinal bore 23 escapes and, e.g. can flow along flats 24 to the valve seat surface 16.
  • the injection valve is actuated electromagnetically in a known manner.
  • the electromagnetic circuit with the magnet coil 1, the inner core 2, the outer valve jacket 5 and the armature section 17 is used Anchor section 17 is with the Valve closing body 19 facing away from the core 2.
  • the spherical valve closing body 19 acts with the conically tapering in the direction of flow
  • Valve seat surface 16 of the valve seat body 15 together, which is formed in the axial direction downstream of a guide opening in the valve seat body 15.
  • the spray hole disk 21 has at least one, for example four, spray openings 27 formed by eroding, laser drilling or punching.
  • the insertion depth of the core 2 in the injection valve is, among other things, decisive for the stroke of the valve needle 14.
  • the one end position of the valve needle 14 when the magnet coil 1 is not energized is determined by the valve closing body 19 resting against the valve seat surface 16 of the valve seat body 15, while the other The end position of the valve needle 14 when the solenoid coil 1 is excited results from the contact of the armature section 17 at the downstream core end.
  • the stroke is adjusted by axially displacing the core 2 in the valve sleeve 6, which is firmly connected to the valve sleeve 6 in accordance with the desired position.
  • the core 2 has a small diameter compared to the inner diameter of the valve sleeve 6
  • the fixation of the core 2 and thus the setting of the valve needle stroke is therefore preferably self-locking.
  • the core 2 can also be attached to the valve sleeve 6 with a weld spot or a circumferential weld seam.
  • adjusting element in the form in a flow bore 28 of the core 2, which runs concentrically to the valve longitudinal axis 10 and serves to supply the fuel in the direction of the valve seat surface 16 an adjusting spring 29 inserted.
  • the adjusting spring 29 is used to adjust the spring preload of the return spring 25 abutting the adjusting spring 29, which in turn is supported with its opposite side on the valve needle 14, the dynamic spray quantity also being adjusted using the adjusting spring 29.
  • the adjusting element can also be designed as an adjusting bolt, adjusting sleeve etc. instead of an adjusting spring.
  • the injection valve described so far is characterized by its particularly compact design, so that a very small, handy injection valve is created.
  • These components form a pre-assembled, independent assembly, which is referred to below as functional part 30.
  • the functional part 30 thus essentially comprises the electromagnetic circuit 1, 2, 5 and a sealing valve (valve closing body 19, valve seat body 15) with a subsequent jet processing element (spray hole disk 21).
  • the coil space formed between the valve jacket 5 and the valve sleeve 6 and almost completely filled by the magnet coil 1 is limited in the direction facing the valve seat body 15 by a stepped radial region 32 of the valve jacket 5, while the closure on the side facing away from the valve seat body 15 is limited by a disk-shaped cover element 33 is guaranteed.
  • the coil body 3 extends through it in a recess in the cover element 33. In this area, for example, two contact pins 34 protrude from the plastic of the coil former 3.
  • the electrical contacting of the magnetic coil 1 and thus its excitation takes place via the electrical contact pins 34.
  • a second assembly is produced, which is referred to below as the connecting part 40.
  • the connecting part 40 is characterized above all by the fact that it comprises the electrical and the hydraulic connection of the fuel injector.
  • the connection part 40 which is largely designed as a plastic part, therefore has an as
  • a fuel filter 45 is inserted or pressed into a flow bore 43 of an inner tube 44 in the base body 42, which runs concentrically to the longitudinal axis 10 of the valve and through which the fuel flows in the axial direction from the inflow end of the fuel injection valve.
  • connection part 40 and functional part 30 are achieved in the fully assembled fuel injection valve in that the flow bores 43 and 28 of both assemblies are brought together so that an unimpeded flow of fuel is ensured.
  • An inner opening 46 in the cover element 33 allows the valve sleeve 6 and thus also the core 2 to be designed such that both protrude through the opening 46 and at least the valve sleeve 6 projects significantly beyond the cover element 33 in the direction of the connecting part 40.
  • a lower end 47 of the tube 44 projects into the projecting part of the valve sleeve 6 to increase the connection stability into the opening 11 of the valve sleeve 6.
  • the base body 42 sits, for example, on the cover element 33 and the upper end of the valve jacket 5.
  • the base body 42 also includes an integrally molded electrical connector 56.
  • the electrical contact elements 55 end at one end as exposed contact pins of the electrical connector 56, which are connected to a corresponding electrical connector, not shown, such as, for. B. a contact strip, can be connected for complete electrical contacting of the injection valve.
  • the contact elements 55 form an electrical connection with the corresponding contact pins 34.
  • FIG. 2 shows a valve assembly of the entire fuel injection valve, this valve assembly being essentially formed by the valve sleeve 6 and the fixed and axially movable components within the valve sleeve 6.
  • the core 2 is completely immersed in the valve sleeve 6, which means that it is surrounded by the valve sleeve 6 over its entire axial length in the circumferential direction.
  • the valve sleeve 6, which guarantees complete tightness to the outside, makes it possible to use a core 2 which can be produced by rolling or bending.
  • the core 2 is made according to the invention from a metallic strip with a uniform thickness, which is punched out of sheet metal in the form of a square, in particular a rectangle, and then rolled or bent into the desired shape, for example with the aid of a mandrel-shaped tool is, so that it ultimately has an annular cross section.
  • Strip ends 61, 62 have an axially extending longitudinal slot 63, since they lie opposite one another at a slight distance, as FIG. 3 shows as a top view of the core 2.
  • a core 2 shaped in this way has several advantages over the known cores in fuel injection valves which are designed as turned parts. Rolling or bending is a comparatively simple and inexpensive manufacturing process with relatively little material.
  • the axial longitudinal slot 63 of the core 2 results in a reduction in the eddy currents, as a result of which a higher efficiency of the magnetic circuit is achieved.
  • the assembly of the core 2 in the valve sleeve 6 and the stroke adjustment with the aid of the core 2 is significantly simplified.
  • the core 2 After rolling or bending, the core 2 has an outer diameter that is slightly larger than the diameter of the opening 11 of the valve sleeve 6.
  • the core 2 is radially preloaded from the outset, which simply places the core 2 in the valve sleeve 6 can be fixed.
  • the size of the core 2 can be changed radially to a small extent, so that when the core 2 is inserted into the valve sleeve 6, burr formation is advantageously avoided.
  • the core 2 can also be moved correspondingly simply for adjusting the stroke of the valve needle 14 in the valve sleeve 6 with an adjusting tool.
  • valve sleeve 6 it is advantageous to provide a shoulder 65 in the valve sleeve 6 near an upstream end face 64 of the core 2. Upstream of the shoulder 65, the valve sleeve 6 has a larger diameter than downstream of the shoulder 65, that is to say in the area in which the core 2 is introduced into the opening 11.
  • an adjusting tool acts, for example, on the core 2 and the valve sleeve 6 in such a way that, on the one hand, a force in the downstream direction on the core 2 and, on the other hand, a counterforce in the upstream direction on the shoulder 65 of the valve sleeve 6 are applied, whereby a non-positive connection between the valve sleeve 6 and the core 2 is achieved.
  • Arrows with the formula symbol F symbolize this force effect in FIG. 2.

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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une soupape d'injection de carburant pour installations d'injection de carburant de moteurs à combustion interne. La soupape d'injection de carburant comprend un élément d'actionnement électromagnétique pourvu d'une bobine magnétique (11) comportant un pôle intérieur (2) tubulaire et un composant de circuit magnétique (5) extérieur, une douille de soupape (6) à paroi mince, présentant une ouverture (11) intérieure, et un obturateur (19) mobile qui coopère avec un siège de soupape (16) associé à un corps de siège de soupape (15). Le corps de siège de soupape (15) et le pôle intérieur (2) sont montés fixes dans l'ouverture (11) intérieure de la douille de soupape (6). Le pôle intérieur (2) présente une fente longitudinale (63) qui résulte de la production dudit pôle par enroulement ou cintrage.
EP99955826A 1999-01-08 1999-10-01 Soupape d'injection de carburant Expired - Lifetime EP1062421B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19900406 1999-01-08
DE19900406A DE19900406A1 (de) 1999-01-08 1999-01-08 Brennstoffeinspritzventil
PCT/DE1999/003157 WO2000040855A1 (fr) 1999-01-08 1999-10-01 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1062421A1 true EP1062421A1 (fr) 2000-12-27
EP1062421B1 EP1062421B1 (fr) 2008-03-05

Family

ID=7893750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99955826A Expired - Lifetime EP1062421B1 (fr) 1999-01-08 1999-10-01 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6679435B1 (fr)
EP (1) EP1062421B1 (fr)
JP (1) JP4597376B2 (fr)
KR (1) KR20010052203A (fr)
DE (2) DE19900406A1 (fr)
WO (1) WO2000040855A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017194242A1 (fr) * 2016-05-13 2017-11-16 Robert Bosch Gmbh Injecteur présentant un actionneur magnétique perfectionné

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Publication number Priority date Publication date Assignee Title
US6851622B2 (en) * 2002-01-08 2005-02-08 Siemens Vdo Automotive Corporation Fuel injector having a ferromagnetic coil bobbin
US7407120B1 (en) * 2002-11-21 2008-08-05 Jack French Adjustable racing injector
JP2004293313A (ja) 2003-03-25 2004-10-21 Hitachi Unisia Automotive Ltd 燃料噴射弁
DE10332348A1 (de) * 2003-07-16 2005-02-03 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004042592A1 (de) * 2004-07-26 2006-03-23 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004047041B4 (de) * 2004-09-28 2017-06-14 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006046704A1 (de) * 2006-10-02 2008-04-03 Siemens Ag Zylinderförmiges Gehäuse und Verfahren zu dessen Herstellung
DE102007031855A1 (de) * 2007-07-09 2009-01-15 Robert Bosch Gmbh Ventilpatrone für ein Magnetventil
JP4635074B2 (ja) * 2008-06-12 2011-02-16 日立オートモティブシステムズ株式会社 燃料噴射弁
DE102008035087B4 (de) * 2008-07-28 2015-02-12 Continental Automotive Gmbh Einspritzventil
US8316825B1 (en) 2008-08-04 2012-11-27 French Iii Jack M Adjustable racing injector
DE102010029298A1 (de) * 2010-05-26 2011-12-01 Robert Bosch Gmbh Ventilanordnung zur Dosierung eines fluiden Mediums in einen Abgasstrang einer Brennkraftmaschine
DE102010040898A1 (de) * 2010-09-16 2012-03-22 Robert Bosch Gmbh Brennstoffeinspritzventil
US9115678B2 (en) 2012-08-09 2015-08-25 Ford Global Technologies, Llc Magnetized fuel injector valve and valve seat
US9627121B2 (en) * 2014-05-28 2017-04-18 Flextronics Automotive, Inc. Solenoid robust against misalignment of pole piece and flux sleeve
EP3156639A1 (fr) 2015-10-15 2017-04-19 Continental Automotive GmbH Soupape d'injection de carburant avec un anneau de soudure et son procédé de production
JP7116609B2 (ja) * 2018-07-05 2022-08-10 株式会社Soken 燃料噴射弁
CN209164045U (zh) * 2018-11-19 2019-07-26 浙江锐韦机电科技有限公司 泵阀一体机构
BR102020021497A2 (pt) 2020-10-20 2022-05-03 Mrb Machining & Ferramentaria Ltda Válvula dosadora de combustível de alta vazão
WO2023059662A1 (fr) 2021-10-04 2023-04-13 Billet Machine And Fabrication, Inc. Injecteur de combustible

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JPH11132127A (ja) * 1996-11-13 1999-05-18 Denso Corp 燃料噴射弁及びその組立方法
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017194242A1 (fr) * 2016-05-13 2017-11-16 Robert Bosch Gmbh Injecteur présentant un actionneur magnétique perfectionné
US11339756B2 (en) 2016-05-13 2022-05-24 Robert Bosch Gmbh Injector having an improved solenoid actuator

Also Published As

Publication number Publication date
KR20010052203A (ko) 2001-06-25
DE19900406A1 (de) 2000-07-13
WO2000040855A1 (fr) 2000-07-13
EP1062421B1 (fr) 2008-03-05
JP2002534638A (ja) 2002-10-15
DE59914674D1 (de) 2008-04-17
JP4597376B2 (ja) 2010-12-15
US6679435B1 (en) 2004-01-20

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