EP1481157A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1481157A1
EP1481157A1 EP02795039A EP02795039A EP1481157A1 EP 1481157 A1 EP1481157 A1 EP 1481157A1 EP 02795039 A EP02795039 A EP 02795039A EP 02795039 A EP02795039 A EP 02795039A EP 1481157 A1 EP1481157 A1 EP 1481157A1
Authority
EP
European Patent Office
Prior art keywords
armature
intermediate ring
fuel injection
injection valve
fuel
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
EP02795039A
Other languages
German (de)
English (en)
Other versions
EP1481157B1 (fr
Inventor
Klaus Noller
Martin Buehner
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 EP1481157A1 publication Critical patent/EP1481157A1/fr
Application granted granted Critical
Publication of EP1481157B1 publication Critical patent/EP1481157B1/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
    • 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
    • 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
    • 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
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • a fuel injector is already known from US Pat. No. 4,766,405, which has a valve closing body connected to a valve needle, which cooperates with a valve seat surface formed on a valve seat body to form a sealing seat.
  • Fuel injector a solenoid is provided, which cooperates with an armature, which 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 is connected to the armature via an elastomer layer.
  • a disadvantage here 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.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the armature is arranged against rotation between the intermediate ring and the damping element without the need for additional components.
  • the other functions such as debouncing the armature and the valve needle and discharging the fuel from the sealing element remain unaffected.
  • the intermediate ring is advantageously located in a recess which is formed in an end face of the armature on the outlet side.
  • One design variant provides for the armature and the intermediate ring to be connected directly to one another in a simple and inexpensive manner by welding.
  • Another advantage is that the interlocking or interconnected components armature and intermediate ring are arranged against rotation on the valve needle by the static friction that prevails between the damping element and the intermediate ring.
  • FIG. 1 shows a schematic section through an exemplary embodiment of a fuel injector designed according to the invention
  • FIG. 2A shows a schematic longitudinal section through the fuel injection valve according to the invention in the area IIA in FIG. 1,
  • FIG. 2B shows a schematic section along the line IIB-IIB in FIG . 2A
  • FIG. 3 one . schematic longitudinal section through a further embodiment of a fuel injector according to the invention in
  • FIGS. 2A, 2B and 3 Before exemplary embodiments of a fuel injector s 1 according to the invention are described in more detail with reference to FIGS. 2A, 2B and 3, a fuel injector with respect to its essential components will first be briefly explained with reference to FIG. 1.
  • the fuel injector 1 is designed in the form of a fuel injector for fuel injection systems of mixture-compressing, externally ignited internal combustion engines.
  • 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 the 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 an inwardly opening fuel injector 1, which has a spray opening 7.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole 9 of a solenoid 10.
  • Magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12 'which rests against an inner pole 13 of the solenoid 10 degrees.
  • the inner pole 13 and the outer pole 9 are separated from one another by a constriction 26 and are connected to one another by a non-ferro magnetic connection 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.
  • valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjusting washer 15 is used for stroke adjustment.
  • An armature 20 is located on the other side of the adjusting washer 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 is.
  • a restoring spring 23 is supported on the first flange 21, which 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. The fuel 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.
  • a seal 28 against a fuel line, not shown.
  • On the spray side of the armature 20 is a. annular damping element 32, which consists of an elastomer material, arranged. It rests on a second flange 31, which is non-positively connected to the valve needle 3.
  • the fuel injection valve 1 has an intermediate ring 33 between the damping element 32 and the armature 20, which is designed and arranged in such a way that rotation of the armature 20 during operation of the fuel injection valve 1 is prevented.
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 against its stroke direction in such a way that the valve closing body 4 is held in sealing contact with the valve seat 6.
  • the magnet coil 10 When the magnet 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 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, which is connected to the valve needle 3, lifts off the valve seat surface 6 and the fuel is sprayed through the spray opening 7.
  • valve needle 3 A part of the valve needle 3 is shown, the second flange 31 welded to it and the lower part of the armature 20 with the fuel channel 30a running therein.
  • the damping element 32 rests on the second flange 31.
  • the illustrated first 'embodiment of an intermediate ring 33, which' in Fig. 2A between a abillerseifigen anchor surface 35 and the damping element 32 is arranged.
  • the armature 20 could twist in an uncontrolled manner during the operation of the fuel injector 1 without the measures according to the invention.
  • the rotations show signs of wear over time, which can lead to a change in the stroke of the armature 20, the stroke of the valve needle 3 or even jamming of the armature 20 with subsequent malfunctions of the fuel injector 1.
  • the intermediate ring 33 is therefore shaped or arranged such that the armature 20 is mounted on the valve needle 3 in a manner secured against rotation and can only move axially within the framework of the armature stops which are formed by the first flange 21 and the second flange 31 ,
  • the intermediate ring 33 has a polygonal shape, which results from the removal of segments from the originally round intermediate ring 33.
  • the number of edges 34 is six, as can be seen from FIG. 2B, which shows a sectional illustration along the line labeled IIB-IIB in FIG. 2A.
  • FIG. 2B shows a sectional illustration along the line labeled IIB-IIB in FIG. 2A.
  • it is also necessary to immerse it in the armature 20 in a recess 35. This can be seen in FIG. 2A in a downstream end face 36 of the armature 20.
  • the diameter of the recess 35 is slightly smaller than the original diameter of the intermediate ring 33 before the attachment of the edges 34.
  • the fuel channels formed in the armature 20 are cut 30a, so that corner points 37 are formed, at which the edges 34 of the intermediate ring 33 selectively. Due to the fact that one corner 38 of the intermediate ring 33 engages in a fuel channel 30a cut in this way, the intermediate ring 33 can be opposite the armature
  • the static friction between the intermediate ring 33 and the damping element 32 is so great that they can not rotate against each other.
  • Fig. 3 shows a second embodiment of an embodiment of the invention
  • Fuel injector 1 in the same view as FIG. 2A.
  • the same components are provided with the same reference numerals.
  • the rotation fixing of the armature 20 in relation to the intermediate ring 33 in the present second exemplary embodiment is achieved by at least one weld point 39, preferably a circumferential weld seam.
  • the welding point 39 can extend over the entire circumference of the intermediate ring 33.
  • Several welds can also be limited to individual points, for example between the fuel channels 30a.
  • the invention is not limited to the illustrated embodiments and z. B. also suitable for outward opening fuel injection valves 1 or other anchor shapes, for example flat anchors.

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)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une soupape d'injection de carburant (1), servant notamment à l'injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne. Ladite soupape comprend un pointeau (3) qui coopère avec une surface de siège de soupape (6), de sorte à former un siège d'étanchéité, ainsi qu'un induit (20) appliqué sur le pointeau (3). Ledit induit (20) peut se déplacer dans le sens axial sur le pointeau (3) et est amorti par un élément amortisseur (32) en élastomère. Une bague intermédiaire (33) est prévue entre l'induit (20) et l'élément amortisseur (32) et ledit élément amortisseur (32) se situe sur un flasque (31) rattaché par liaison de force au pointeau (3). L'induit (20) est logé bloqué en rotation sur le pointeau (3) par la bague intermédiaire (33).
EP02795039A 2002-02-26 2002-12-23 Soupape d'injection de carburant Expired - Lifetime EP1481157B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10208224 2002-02-26
DE10208224A DE10208224A1 (de) 2002-02-26 2002-02-26 Brennstoffeinspritzventil
PCT/DE2002/004732 WO2003072928A1 (fr) 2002-02-26 2002-12-23 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1481157A1 true EP1481157A1 (fr) 2004-12-01
EP1481157B1 EP1481157B1 (fr) 2005-08-24

Family

ID=27740426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02795039A Expired - Lifetime EP1481157B1 (fr) 2002-02-26 2002-12-23 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US7007870B2 (fr)
EP (1) EP1481157B1 (fr)
JP (1) JP4276954B2 (fr)
KR (1) KR20040086443A (fr)
AT (1) ATE302902T1 (fr)
DE (2) DE10208224A1 (fr)
WO (1) WO2003072928A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20030090A1 (it) * 2003-02-21 2004-08-22 Magneti Marelli Powertrain Spa Iniettore di carburante per un motore a combustione interna.
DE102010021118A1 (de) * 2010-04-15 2011-10-20 Micro-Epsilon Messtechnik Gmbh & Co. Kg Sensor
EP2851551B1 (fr) 2013-09-20 2016-05-25 Continental Automotive GmbH Soupape d'injection de fluide
CN109154261B (zh) * 2016-06-02 2021-06-08 大陆汽车有限公司 用于喷射阀的阀组件以及喷射阀
DE102017207270A1 (de) * 2016-06-30 2018-01-04 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
US10119507B1 (en) * 2017-07-17 2018-11-06 GM Global Technology Operations LLC Rotating fuel injector assembly
DE102017222501A1 (de) * 2017-12-12 2019-06-13 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
EP4348031A1 (fr) 2021-05-28 2024-04-10 Stanadyne LLC Injecteur de carburant

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4766405A (en) 1987-04-14 1988-08-23 Allied Corporation Dynamic energy absorber
DE19950761A1 (de) 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10039078A1 (de) 2000-08-10 2002-02-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10118162B9 (de) 2001-04-11 2004-09-09 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10124743A1 (de) * 2001-05-21 2002-11-28 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03072928A1 *

Also Published As

Publication number Publication date
EP1481157B1 (fr) 2005-08-24
DE50204045D1 (de) 2005-09-29
JP2005518497A (ja) 2005-06-23
JP4276954B2 (ja) 2009-06-10
KR20040086443A (ko) 2004-10-08
DE10208224A1 (de) 2003-09-11
US7007870B2 (en) 2006-03-07
US20040155124A1 (en) 2004-08-12
WO2003072928A1 (fr) 2003-09-04
ATE302902T1 (de) 2005-09-15

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