EP1047870B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1047870B1
EP1047870B1 EP99950456A EP99950456A EP1047870B1 EP 1047870 B1 EP1047870 B1 EP 1047870B1 EP 99950456 A EP99950456 A EP 99950456A EP 99950456 A EP99950456 A EP 99950456A EP 1047870 B1 EP1047870 B1 EP 1047870B1
Authority
EP
European Patent Office
Prior art keywords
housing body
valve seat
stroke
side end
seat support
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.)
Expired - Lifetime
Application number
EP99950456A
Other languages
German (de)
English (en)
Other versions
EP1047870A1 (fr
Inventor
Andreas Eichendorf
Thomas Sebastian
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 EP1047870A1 publication Critical patent/EP1047870A1/fr
Application granted granted Critical
Publication of EP1047870B1 publication Critical patent/EP1047870B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02M61/161—Means for adjusting injection-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
    • 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

Definitions

  • the invention is based on a fuel injector according to the preamble of claim 1.
  • DE 196 26 576 A1 already discloses a fuel injector known according to the preamble of claim 1.
  • This fuel injector has a valve closing body, the one with a valve seat support Valve seat surface interacts to form a sealing seat.
  • the Valve closing body is located on the inside of the Valve seat carrier extending valve needle and one with the Valve needle on the opposite of the valve closing body Anchor connected at the end by means of a magnetic coil can be operated electromagnetically.
  • the valve seat support is in used a housing body and by means of a Housing body screwed threaded ring against a stroke adjusting disc preloadable between the housing body and the valve seat carrier is inserted. The stroke adjustment disc is therefore located inside the housing body.
  • the stroke adjusting disc serves the stroke of the valve closing body in the electromagnetic actuation of the Adjust fuel injector.
  • a variation of the Thickness dimension of the stroke adjustment disc leads to a Variation of the axial position of the valve seat surface. At a certain length of the valve needle and a certain position One stop surface for the armature is the valve lift established.
  • FIG. 1 A known fuel injector of a similar design is shown in Fig. 1 and will be detailed later described.
  • This design corresponds to the arrangement the stroke adjuster of those of DE 196 26 576 A1 with the difference that the valve seat support with the valve housing not through a threaded ring but is connected by a flare connection. Also this fuel injector are liable for those already described Disadvantages.
  • the fuel injector according to the invention with the features of claim 1 has the advantage that the Stroke adjustment disc due to the peripheral outside Arrangement compared to the housing body simple and inexpensive is mountable. At the same time, there is the advantage that the valve seat support against the housing body through the stroke adjusting disc due to the relatively large diameter the stroke adjusting disc against tilting is secured.
  • the stroke adjusting disc is preferably in a rotating one Groove of the housing body can be used and lies on an inlet side End face on the housing body and on one spray-side end face on a peripheral circumferential Protrusion of the valve seat body.
  • the connection between the housing body and the stroke adjusting disc on the one hand and between the stroke adjusting disc with the valve seat support on the other hand, a weld seam can then be used respectively.
  • the stroke adjuster not only has that Function, the axial position of the valve seat carrier opposite to determine the housing body and thus the valve stroke, but also the function of a connecting element between the housing body and the valve seat carrier.
  • the weld seams is preferably a weld shrink tension caused the housing body, the stroke adjustment and biases the valve seat body against each other. Thereby the strength is particularly high.
  • valve seat body into an injection-side end of the housing body
  • these components using a seal are sealed against each other.
  • This has the advantage that the pressure of that in the fuel injector Fuel not up to the whore shim and Penetrates welds and therefore no strain on the Welds occur due to fuel pressure.
  • the connection between the valve housing and the valve seat support and the stroke setting are therefore largely independent from the fuel pressure.
  • FIG. 1 for a better understanding of the invention Fuel injector according to the prior art, so that the later description of the invention Embodiment on the invention Can restrict special features. That in Fig. 1 Fuel injector shown is used for injection of fuel, especially with a mixture compressing spark ignition internal combustion engine.
  • the fuel injector generally designated by the reference number 1 has a valve closing body 2, the with a valve seat surface formed on a valve seat body 3 4 interacts to form a sealing seat.
  • the valve closing body 2 is via a valve needle 5 with an anchor 6 connected.
  • the armature 6 is connected by means of a magnetic coil 7 an axial force component so acted that the Valve closing body 2 lifts off the valve seat surface 4 and a spray opening 8 releases.
  • After switching off the Solenoid 7 exciting electrical excitation current is the valve closing body 2 by one acting on the armature 6
  • Return spring 9 back into its closed position recycled.
  • the bias of the return spring 9 is over one by means of a thread with a first housing body 11 connected adjusting sleeve 10 adjustable.
  • the fuel flows through a fuel inlet opening 12 and a fuel filter 13 in an axial longitudinal bore 14 of the first Housing body 11 and further via an axial longitudinal bore 15 of the adjusting sleeve 10 and a longitudinal bore 16 of the Armature 6 and a longitudinal bore 17 one even closer descriptive stroke adjusting disk 18 in a longitudinal bore 19 of the valve seat support 3 and thus arrives at that of the Valve closing body 2 formed with the valve seat surface 4 Sealing seat.
  • the first housing body 11 is made of a plastic injection molded body 20 surround, on which also a connector 21 for the electrical connection of a connecting cable the solenoid 7 is molded.
  • a second housing body 22 is provided, which with the first housing body 11 by a first crimp connection 23 is connected.
  • the second housing body 22 has a longitudinal bore 24 into which the valve seat support 3 is inserted axially and opposite by means of a seal 25 the second housing body 22 is sealed.
  • the valve seat support 3 and the second housing body 22 are by a second flange connection 30 connected together.
  • the stroke adjustment plate 18 serves to determine the valve stroke, d. H. of the stroke of the valve closing body 2 from the Valve closing surface 4 in the actuated state of the fuel injector 1.
  • the valve lift is by an in 1 not discernible slight gap between the upstream end face 28 of the armature 6 and one downstream end face 29 of the first housing body 11 established. This gap in turn results from the Length of the valve needle 5 and the armature 6, measured from the upstream end face 28 of the armature 6 to the Contact surface of the valve closing body 2 on the valve closing surface 4 of the valve seat support 3, and by the axial position of the valve seat body 3.
  • valve lift is therefore on the manufacturing tolerances of numerous components depending, in particular on the manufacturing tolerance of the Valve closing body 4, the valve needle 5, the armature 6, the Valve seat support 3 and the two housing bodies 11 and 22. Because the sum of these manufacturing tolerances is significantly larger is considered to be the required tolerance of the valve lift according to a common procedure, the valve lift measure the determining dimensions of the above components and paired a suitable stroke adjustment disc. Doing so the thickness dimension of the stroke adjustment disc is selected in this way or manufactured so that the total required valve lift within a narrow tolerance window.
  • the invention relates to an improvement in the arrangement and Forming the stroke adjusting disk 18.
  • Fig. 2 shows an embodiment of an inventive Fuel injector 1 in an excerpt, cut illustration. Only those are shown Elements essential to the invention. Around The assignment is already made easier with reference to FIG. 1 described elements with matching reference numerals Mistake.
  • the Valve stroke is through a gap 41 between the inlet side Face 28 of the armature 6 and a spray side End face 42 of a tubular portion 43 of the second housing body 22 set.
  • the tubular Section 43 has a radially protruding outward Area 44 of the second housing body 22 over a thin Connecting web 45 connected.
  • the connecting web 45 is dimensioned extremely thin to the main part of the lead magnetic flux through the armature 6 and a magnetic short circuit at the connecting web 45 avoid.
  • the armature 6 has holes 46 for the passage of fuel on.
  • the stroke adjusting disk 18 surrounds spray-side end 47 of the second housing body 22 peripheral outside.
  • the stroke adjuster 18 is preferred ring-shaped.
  • the stroke adjustment disc 18 is part of the valve housing and is in a circumferential groove 48 of the second housing body 22 used.
  • the stroke adjusting disc 18 lies with a inlet end face 49 on an opposite, associated end face 50 of the second housing body 22 in the assembled condition.
  • An end face on the spray side 51 of the stroke adjusting disk 18 lies on an opposite, associated end face 52 of the valve seat body 3 flush when assembled.
  • the end 47 of the second housing body 22 is located preferably a radial tolerance gap 54.
  • FIG. 1 An inlet-side end 55 of the valve seat body 3 is shown in FIG a receiving bore 56 of the spray-side end 47 of the second housing body 22 insertable, so that the Stroke adjuster 18 surrounded end 47 of the spray second housing body 22, the inlet end 55 of the Valve seat carrier 3 surrounds.
  • the inlet end 55 of the valve seat carrier 3 to the spray-side end 47 of the second housing body 22 by means of the rotating Seal 25 sealed.
  • Seal 25 is preferred formed as an 0-ring and in a radial groove 57 of inlet end 55 of the valve seat carrier 3 used.
  • the stroke adjusting disk 18 is by means of a first one circumferential weld seam 58 on its inlet end face 49 with the second housing body 22 and by means of a second circumferential weld seam 59 on its spray-side End face 51 welded to the valve seat support 3.
  • the Weld seams 58 and 59 are technically without Difficulties with a radially attacking from the outside Welding tool can be applied.
  • the extend Welds 58 and 59 do not extend over the entire end face 49 and 50 or 51 and 52.
  • the weld depth remains part of the flat end faces 49 and 50 on the one hand and 51 and 52 on the other hand received, so that an exact axial alignment of the valve seat support 3 with respect to the central axis 60 of the fuel injector 1 is conveyed by the stroke adjusting disk 18.
  • the invention makes targeted use of the weld seams 58 and 59 generated welding shrinkage stress.
  • the Welding shrink tension causes the second to be pre-tensioned Housing body 22, the stroke adjustment 18 and the valve seat support 3 against each other, so that a gap-free Weld seam and high strength can be achieved.
  • the setting dial 18 without Difficulties in the circumferential groove 48 of the second Housing body 22 can be used and thus a Extremely easy-to-assemble design of the fuel injector 1 results.
  • the stroke adjustment 18 in the axial bore 24 of the second housing body 22 is used be what particularly in automatic manufacturing is more difficult to handle.
  • the invention Arrangement and assembly of the stroke adjusting disk 18 insensitive to dirt.
  • the seal 25 ensures that the inside of the fuel injector 1 fuel flowing to the sealing seat does not penetrate to weld seams 58 and 59.
  • the welds 58 and 59 are therefore not with the Fuel under pressure. This is especially true with high pressure injectors essential, where a high There is a fuel pressure of up to 150 bar and still tight Tolerances of the valve lift of, for example, 0.2% are reached Need to become.
  • the weld seams 58 and 59 do not have to be Ensure tightness, but only the axial Forces between the second housing body 22 and the stroke adjusting disc 18 on the one hand and between the stroke adjusting disc 18 and the valve seat support 3 on the other take up. This allows the biasing forces during Welding can be kept low.
  • Welding the stroke adjusting disc 18 with the second housing body 22 and the valve seat support 3 is omitted of the prior art according to DE 196 26 576 A1 provided threaded ring. This saving of one component reduces manufacturing costs.
  • connection between the first housing body 11 and the second housing body 22 can by a further weld 61 take place, which are also applied on the outside can.
  • the stroke adjustment disc 18 defines the valve stroke, it forms an integral part of the valve housing and it mediates the connection between the second housing body 44 and the valve seat carrier Third
  • the invention is not based on the illustrated embodiment limited.
  • the invention Arrangement of the stroke adjusting disc 18 also with the outside opening Fuel injection valves 1 are used in the same way come.

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  • 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)

Claims (9)

  1. Injecteur de carburant (1), notamment soupape d'injection pour des installations injectant à haute pression du carburant dans des moteurs à combustion interne, comprenant :
    un obturateur (2), coopérant avec une portée du siège de soupape (4) réalisée sur un support de siège de soupape (3) pour créer un siège étanche,
    au moins un boítier (22) qui est un composant d'un boítier de soupape (11, 22),
    un disque de réglage de course (18) déterminant la distance entre le boítier (22) et le support de siège (3),
    caractérisé en ce que
    le disque de réglage de course (18) entoure périphériquement de l'extérieur une extrémité (47), côté sortie du carburant, du boítier (22).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le disque de réglage de course (18) est un autre composant du boítier de soupape (11, 22).
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    le boítier (22) présente une rainure périphérique (48) dans laquelle peut être inséré le disque de réglage de course (18) de manière que celui-ci soit en appui par sa face frontale (49), côté entrée, sur une portée frontale correspondante (50) du boítier (22) et par sa face frontale (51), côté sortie, sur une portée frontale correspondante (52) du support de siège (3).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    la face frontale (52) du support de siège (3) sur laquelle s'appuie la face frontale (51), côté sortie, du disque de réglage de course (18) est réalisée sur une partie en saillie périphérique (53) du support de siège (3).
  5. Injecteur de carburant selon la revendication 3 ou 4,
    caractérisé en ce que
    le disque de réglage de course (18) est relié au boítier (22) le long de sa face frontale (49), côté entrée, par un premier cordon de soudure (58) et au support de siège (3) le long de sa face frontale (51), côté sortie, par un second cordon de soudure (59).
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    les cordons de soudure (58, 59) ne s'étendent pas radialement sur toute la largeur des faces frontales (49, 51) et sont réalisés sans fente.
  7. Injecteur de carburant selon la revendication 5 ou 6,
    caractérisé en ce que
    le boítier (22), le disque de réglage de course (18) et le support de siège (3) sont précontraints les uns par rapport aux autres par l'effet de la tension de retrait des cordons de soudure (58, 59).
  8. Injecteur de carburant selon l'une des revendications 1 à 7,
    caractérisé en ce que
    l'extrémité (55), côté entrée, du support de siège (3) est engagée dans l'extrémité (47), côté sortie, du boítier (22) de sorte que cette extrémité (47) entourée par le disque de réglage de course (18) entoure l'extrémité (55), côté entrée, du support de siège (3).
  9. Injecteur de carburant selon la revendication 8,
    caractérisé en ce que
    l'extrémité (55), côté entrée, du support de siège (3) et l'extrémité (47), côté sortie, du boítier (22), sont rendues étanches l'une par rapport à l'autre, au moyen d'un joint d'étanchéité (25).
EP99950456A 1998-11-18 1999-07-29 Soupape d'injection de carburant Expired - Lifetime EP1047870B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19853091A DE19853091A1 (de) 1998-11-18 1998-11-18 Brennstoffeinspritzventil
DE19853091 1998-11-18
PCT/DE1999/002332 WO2000029739A1 (fr) 1998-11-18 1999-07-29 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1047870A1 EP1047870A1 (fr) 2000-11-02
EP1047870B1 true EP1047870B1 (fr) 2003-06-18

Family

ID=7888149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99950456A Expired - Lifetime EP1047870B1 (fr) 1998-11-18 1999-07-29 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US6435429B1 (fr)
EP (1) EP1047870B1 (fr)
JP (1) JP2002530567A (fr)
KR (1) KR20010034147A (fr)
CZ (1) CZ293800B6 (fr)
DE (2) DE19853091A1 (fr)
WO (1) WO2000029739A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10108974A1 (de) * 2001-02-24 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10143500A1 (de) * 2001-09-05 2003-03-20 Bosch Gmbh Robert Brennstoffeinspritzventil
ITBO20050295A1 (it) * 2005-04-29 2006-10-30 Magneti Marelli Powertrain Spa Inietore di carburante con attuatore elettromagnetico
PT1734251E (pt) * 2005-06-17 2007-03-30 Magneti Marelli Powertrain Spa Injector de combustível
DE102005052255B4 (de) * 2005-11-02 2020-12-17 Robert Bosch Gmbh Brennstoffeinspritzventil
US7942349B1 (en) 2009-03-24 2011-05-17 Meyer Andrew E Fuel injector
JP5537493B2 (ja) * 2011-05-13 2014-07-02 日立オートモティブシステムズ株式会社 燃料噴射弁のストローク調整方法及び燃料噴射弁

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6189975A (ja) * 1984-10-09 1986-05-08 Diesel Kiki Co Ltd 内燃機関の燃料噴射ノズル装置
DE4115457A1 (de) 1990-05-17 1991-11-21 Avl Verbrennungskraft Messtech Einspritzduese fuer eine brennkraftmaschine
DE4023828A1 (de) * 1990-07-27 1992-01-30 Bosch Gmbh Robert Verfahren zur einstellung eines ventils und ventil
DE4412277A1 (de) * 1994-04-09 1995-10-12 Bosch Gmbh Robert Elektromagnetisch betätigbares Brennstoffeinspritzventil
DE19626576A1 (de) 1996-07-02 1998-01-08 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19629589B4 (de) * 1996-07-23 2007-08-30 Robert Bosch Gmbh Brennstoffeinspritzventil
DE19712589C1 (de) * 1997-03-26 1998-06-04 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung einer Ventilnadel eines Brennstoffeinspritzventils

Also Published As

Publication number Publication date
DE59905997D1 (de) 2003-07-24
KR20010034147A (ko) 2001-04-25
EP1047870A1 (fr) 2000-11-02
WO2000029739A1 (fr) 2000-05-25
DE19853091A1 (de) 2000-05-25
CZ293800B6 (cs) 2004-08-18
CZ20002626A3 (en) 2001-05-16
JP2002530567A (ja) 2002-09-17
US6435429B1 (en) 2002-08-20

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