EP1379774A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1379774A1
EP1379774A1 EP02732383A EP02732383A EP1379774A1 EP 1379774 A1 EP1379774 A1 EP 1379774A1 EP 02732383 A EP02732383 A EP 02732383A EP 02732383 A EP02732383 A EP 02732383A EP 1379774 A1 EP1379774 A1 EP 1379774A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
damping
injection valve
armature
valve needle
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.)
Withdrawn
Application number
EP02732383A
Other languages
German (de)
English (en)
Inventor
Jens Pohlmann
Guido Pilgram
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 EP1379774A1 publication Critical patent/EP1379774A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the invention relates to a fuel injection valve according to the preamble of claim 1 and claim 9.
  • Valve needle connected valve closing body with a
  • a fuel injector is provided with a solenoid. interacts with an anchor that is non-positively connected to the valve needle.
  • An additional mass is provided in a cylindrical shape around the armature and the valve needle, which mass is connected to the armature via an elastomer layer.
  • a disadvantage is the complex design with an additional component.
  • the large-area elastomer ring is also unfavorable for the course of the magnetic field and makes it difficult to close the field lines and thus to achieve high tightening forces during the opening movement of the fuel injector.
  • a further cylindrical mass is provided for damping and debouncing around the armature and the valve needle, which is clamped and held in position by two elastomer rings. When the valve needle strikes the sealing seat, this second mass can move relative to the armature and valve needle and prevent the valve needle from bouncing.
  • a disadvantage of the described embodiment is the additional effort and space requirement.
  • the armature itself is not decoupled, so its impulse increases the tendency for the valve needle to bounce.
  • the fuel injector according to the invention with the characterizing features of claim 1 has the advantage that damping segments are attached to a carrier disk in such a way that a durable, displacement-free structure is created which balances the liquid between an internal volume enclosed by the valve needle, the armature and the damping element and one Central recess of the fuel injector allows. An additional one is created by the liquid balance. Damping based on the shock absorber principle.
  • the fuel injector according to the invention with the characterizing features of claim 9 has the advantage that damping segments can be inserted into a pre-embossed surface structure of the flange, on which the armature of the fuel injector is supported, and thus the assembly of a further component in the form of a damping element can be omitted.
  • the damping properties can be fully met.
  • the support disk of the damping element is advantageously made of metal, which is what is
  • Damping element makes it durable and stable against lateral migration.
  • the damping segments are designed in the shape of a ring segment and are advantageously glued or vulcanized onto the carrier disk.
  • damping segments do not extend to the edge of the inner recess of the carrier disk, since the volume between the valve needle and the damping element can thereby be reduced.
  • the number of damping segments and the width of the gaps between the damping segments or between the depressions receiving the damping segments can advantageously be adapted to the requirements of the damping properties.
  • Fig. 1 shows a schematic section through a
  • FIG. 2A shows a perspective schematic view of a damping element of a fuel injector designed according to the invention
  • FIG. 2B is a schematic side view of the damping element from FIG. 2A
  • Fig. 2C is a schematic plan view of the damping element of Fig. 2A
  • Fig. 3 is a perspective schematic view of a second embodiment of an inventive. designed fuel injector.
  • a first exemplary embodiment of a fuel injection valve 1 according to the invention shown in FIG. 1 is in the form of a fuel injection valve 1 for fuel injection systems of mixture-compressing, spark-ignition internal combustion engines.
  • the fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injector 1 consists of a nozzle body 2; in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
  • fuel injector 1 is a fuel injector 1 that opens inward and has a spray opening 7.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a solenoid 10.
  • the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
  • the inner pole 13 and the outer pole 9 are separated from one another by a constriction 26 and connected to one another by a non-ferromagnetic connecting component 29.
  • the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
  • the plug contact 17 is surrounded by a plastic sheath 18, which can be molded onto the inner pole 13.
  • the valve needle 3 is guided in a valve needle guide 14, which is disc-shaped. to Stroke adjustment is provided by a paired adjusting disk 15.
  • the armature 20 is located on the other side of the adjusting disk 15. This armature is non-positively connected via a first flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22.
  • a restoring spring 23 is supported on the first flange 21 and, in the present design of the fuel injector 1, is preloaded by a sleeve 24.
  • Fuel channels 30a to 30c run in the valve needle guide 14, in the armature 20 and on the valve seat body 5, which channels the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injector 1 is sealed by a seal 28 against a fuel line, not shown.
  • an annular damping element 32 which consists of an elastomer material, is arranged on the spray-side side of the armature 20. It rests on a second flange 31, which is non-positively connected to the valve needle 3 via a weld seam 33.
  • the damping element 32 ′ is shaped in such a way that a liquid balance between a volume 34, which is formed between the damping element 32 and the valve needle 3, and an interior 35 of the fuel injection valve 1 is possible.
  • the damping element 32 comprises a carrier disk 36, on the end faces 38 and 39 damping segments 37 of an elastomer material are glued or vulcanized. A detailed description of the damping element 32 and its mode of operation can be found in the description of FIGS. 2A to 2C.
  • the first flange 21 is welded to the valve needle 3
  • the armature 20 and the damping element 32 are plugged on, and then the second flange 31 is pressed onto the damping element 32 and also welded to the valve needle 3.
  • the armature 20 has only a slight, highly damped play between the first flange 21 and the damping element 32.
  • the armature 20 In the idle state of the fuel injector 1, the armature 20 is acted upon by the return spring 23 against its lifting direction so that the valve closing body 4 is held on the valve seat 6 in sealing contact.
  • the magnetic coil 10 When the magnetic coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, the stroke being predetermined by a working gap 27 which is in the rest position between the inner pole 12 and the armature 20.
  • the armature 20 also takes the first flange 21, which is welded to the valve needle 3, in the lifting direction.
  • the valve closing body 4 connected to the valve needle 3 lifts off from the valve seat surface 6, and the fuel passed through the fuel channels 30a to 30c is sprayed through the spray opening 7.
  • the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23, as a result of which the first flange 21, which is connected to the valve needle 3, moves counter to the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, as a result of which the valve-closure member 4 is seated on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • FIG. 2A shows a schematic perspective illustration of a damping element of the fuel injector 1 designed according to the invention shown in FIG. 1.
  • the damping element 32 comprises a carrier disk 36, on the inlet-side and / or outlet-end face 38 and 39 damping segments 37 are arranged.
  • the number of damping segments 37 in the present exemplary embodiment is four per end face 38, 39, so that the damping element 32 ′ has a total of eight damping segments 37.
  • These are made of an elastomer and glued to the carrier disk 36, which is preferably made of metal, or vulcanized onto the latter.
  • Gaps 40 are provided between the individual damping segments 37 of each end face 38, 39, which create a connection between a volume 34, which is delimited by the valve needle 3 and the carrier disk 36 of the damping element 32, and the interior 35 of the fuel injection valve 1.
  • the gaps 40 ensure the drainage of the volume 34 between the damping element 32 and the valve needle 3, into which fuel penetrates 1 during the operation of the fuel injector.
  • the ratio of the outflowing amount of fuel to the inflowing amount from or into the volume 34 can be regulated.
  • the resulting damping can be used to avoid bouncing.
  • FIG. 2B shows a schematic side view of the damping element 32 shown in FIG. 2A. It is clarified here that both the inlet-side end surface 38 and the outlet-side end surface 39 of the carrier disk 36 have damping segments 37.
  • FIG. 2C shows a schematic top view of the damping element 32 shown in FIGS. 2A and 2B. It can be seen here that the damping segments 37 do not extend to an inner recess 41 of the carrier disk 36. This improves the drainage of the volume 34 between the valve needle 3 and the damping element 32, since the volume 34 is limited to the axial extent of the carrier disk 36 and the amount of liquid of the fuel pumped into the volume 34 can be kept small.
  • FIG 3 shows a perspective schematic view of a flange 31 with damping segments 37 of a second exemplary embodiment of a fuel injector 1 designed according to the invention.
  • a structure for draining the volume 34 can also be provided in a shoulder-like widening 43 formed on an inlet-side end face 42 of the second flange 31 by the damping segments 37 without gluing into correspondingly provided recesses 44 in the shoulder-like widening 43 of the flange facing the armature 20 31 can be inserted.
  • the depression 44 facing the viewer is shown in FIG. 3 without an inserted damping element 37.
  • the depressions 44 can be produced simply and inexpensively during the manufacture of the cup-shaped flange 31, for example by embossing.
  • the damping segments 37 must protrude axially beyond the depressions 44.
  • the preload achieved when the flange 31 is installed after the armature 20 has been pushed onto the valve needle 3 holds the damping segments 37 in the recesses 44.
  • the one-piece design of the flange 31 with the damping element 32 enables the number of components to be reduced, since the flange 31 and the damping element 32 are designed as a common component.
  • the gaps 40 between the individual damping elements 37 or the recesses 44 receiving the damping elements 37 can be selected as desired, so that the damping behavior can be adapted as desired to the requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne une soupape d'injection de carburant (1), notamment une soupape d'injection de carburant destinée à des systèmes d'injection de carburant de moteurs à combustion interne, ladite soupape comprenant : un pointeau de soupape (3) qui coopère avec une surface de siège de soupape (6) pour former un siège étanche ; et un induit (20) venant en prise contre le pointeau de soupape (3), l'induit (20) pouvant se déplacer axialement contre le pointeau de soupape (3), et étant amorti par un élément d'amortissement (32). L'élément d'amortissement (32) comprend un disque de support annulaire (36), au moins un segment d'amortissement (37) constitué d'un élastomère, étant disposé contre au moins une surface frontale (38, 39) du disque de support (36).
EP02732383A 2001-04-11 2002-04-09 Soupape d'injection de carburant Withdrawn EP1379774A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2001118161 DE10118161B9 (de) 2001-04-11 2001-04-11 Brennstoffeinspritzventil
DE10118161 2001-04-11
PCT/DE2002/001291 WO2002084103A1 (fr) 2001-04-11 2002-04-09 Soupape d'injection de carburant

Publications (1)

Publication Number Publication Date
EP1379774A1 true EP1379774A1 (fr) 2004-01-14

Family

ID=7681273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02732383A Withdrawn EP1379774A1 (fr) 2001-04-11 2002-04-09 Soupape d'injection de carburant

Country Status (5)

Country Link
EP (1) EP1379774A1 (fr)
JP (1) JP2004518903A (fr)
CN (1) CN1461380A (fr)
DE (1) DE10118161B9 (fr)
WO (1) WO2002084103A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256948A1 (de) * 2002-12-05 2004-06-24 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005048545B4 (de) * 2005-10-11 2017-12-14 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102008042593A1 (de) * 2008-10-02 2010-04-08 Robert Bosch Gmbh Kraftstoff-Injektor sowie Oberflächenbehandlungsverfahren
CN112796916B (zh) * 2021-03-08 2024-03-19 钧风电控科技(泰州)有限责任公司 一种阀杆组件及高压燃料喷射阀

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1101859B (de) * 1958-09-24 1961-03-09 Bosch Gmbh Robert Elektromagnetisch betaetigtes Einspritzventil fuer Brennkraftmaschinen
DE1169242B (de) * 1961-05-10 1964-04-30 Christian Buerkert Magnetventil fuer Wechselstrombetrieb mit schlag- und geraeuschdaempfenden Mitteln
US4766405A (en) * 1987-04-14 1988-08-23 Allied Corporation Dynamic energy absorber
US4978074A (en) * 1989-06-21 1990-12-18 General Motors Corporation Solenoid actuated valve assembly
JP2997751B2 (ja) * 1990-10-31 2000-01-11 ヤマハ発動機株式会社 電磁弁装置
US5299776A (en) * 1993-03-26 1994-04-05 Siemens Automotive L.P. Impact dampened armature and needle valve assembly
JPH07167004A (ja) * 1993-12-14 1995-07-04 Toyota Motor Corp 燃料噴射弁
US5967413A (en) * 1998-02-11 1999-10-19 Caterpillar Inc. Damped solenoid actuated valve and fuel injector using same
DE19849210A1 (de) * 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19927900A1 (de) * 1999-06-18 2000-12-21 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02084103A1 *

Also Published As

Publication number Publication date
WO2002084103A1 (fr) 2002-10-24
JP2004518903A (ja) 2004-06-24
DE10118161A1 (de) 2002-10-24
CN1461380A (zh) 2003-12-10
DE10118161B9 (de) 2004-09-09
DE10118161C2 (de) 2003-04-24

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