EP1430218B1 - Soupape, en particulier soupape d'injection de carburant - Google Patents

Soupape, en particulier soupape d'injection de carburant Download PDF

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Publication number
EP1430218B1
EP1430218B1 EP02776723A EP02776723A EP1430218B1 EP 1430218 B1 EP1430218 B1 EP 1430218B1 EP 02776723 A EP02776723 A EP 02776723A EP 02776723 A EP02776723 A EP 02776723A EP 1430218 B1 EP1430218 B1 EP 1430218B1
Authority
EP
European Patent Office
Prior art keywords
valve
annular groove
valve body
accordance
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.)
Expired - Lifetime
Application number
EP02776723A
Other languages
German (de)
English (en)
Other versions
EP1430218A1 (fr
Inventor
Grit KRÜGER
Andrej Astachow
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1430218A1 publication Critical patent/EP1430218A1/fr
Application granted granted Critical
Publication of EP1430218B1 publication Critical patent/EP1430218B1/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
    • F02M61/168—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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for

Definitions

  • the invention relates to a valve, in particular a fuel injection valve for a high-pressure accumulator injection system of an internal combustion engine, as shown for example in DE 199 56 830 A, WO 0102718 A or GB 1334939A.
  • a valve needle which is sealingly guided in a valve body of an injection valve and slidably disposed.
  • the valve needle has at its tip a valve needle seat which, together with a valve body seat of the valve body, opens or closes at least one nozzle opening to the combustion chamber of the internal combustion engine.
  • the at least one nozzle opening is typically arranged in the region of the valve body seat.
  • nozzle body and axially movable nozzle needle can a seal between the pressure chamber and leakage chamber only by means of a sealing gap, as any type of conventional elastic seals the high pressure loads in the long term could not withstand.
  • the sealing gap must be made very precisely be, even with fluctuating temperatures with the Resulting material expansions at any time a low-friction Guide the valve needle while doing a To ensure the best possible sealing effect.
  • An object of the invention is to prevent the leakage of a Fuel injection valve of a high-pressure accumulator injection system to minimize.
  • a valve in particular a fuel injection valve for a high-pressure accumulator injection system of an internal combustion engine, is a valve body with a valve body seat and one in the valve body within a stationary one circular cylindrical guide surface over a guide length Guided valve needle with a valve needle seat for Control of a nozzle opening is provided further provided that in the valve body under high pressure standing pressure reservoir in the form of a coaxial with Guide surface arranged annular groove is present.
  • This valve according to the invention according to claim 1 has the advantage of a reduced Leakage between guide surface in the valve body and Valve needle guide on because the high pressure Pressure reservoir in the form of the annular groove an elastic deformation the guide surface of the valve body in the direction of Valve needle guide out causes. This elastic deformation reduces the sealing gap between valve needle guide and Guide surface to a minimum, thus ensuring for a significantly reduced leakage.
  • a preferred embodiment of the invention provides that the annular groove through a hollow cylindrical wall section is separated from the guide surface of the valve body. This Wall section is subject to the occurring high pressures in the annular groove of an elastic deformation in the direction of Valve needle guide and ensures in this way for a reduction the fuel leak.
  • the annular groove has a depth that at least one fifth of the guide length of the valve needle guide, which has the advantage of a sufficiently long wall section has, elastically deformed in the desired manner can be.
  • the annular groove can also be much deeper be formed, for example. Up to half of the guide length of Valve needle guide.
  • a preferred embodiment of the invention provides a hydraulic Connection between a fuel inlet of a Pressure chamber in the valve body and the annular groove, whereby the Ring groove at any time under full pressure in the fuel valve stands. In this way is the same time the deformation the wall portion depending on the ruling in the annular groove Fuel pressure. This has the advantage that normally at higher pressure increasing leakage through the at high pressure simultaneously reduced smaller sealing gap becomes.
  • the annular groove preferably has a thickness which is at least one fifth of the diameter of the guide surface equivalent.
  • the wall section between Valve body and annular groove on a thickness approximately the thickness of the annular groove corresponds.
  • the leakage gap in the needle guide is from the annular groove separated by the wall section.
  • the annular groove is through a Connecting groove in the nozzle body connected to the high-pressure bore.
  • FIG. 1 shows a fuel injection valve according to the invention in a schematic sectional view.
  • the injection valve 2 is made from a valve body 4 and a valve needle 6, the with a valve needle guide 8 in the valve body 4 tight is guided.
  • a blind hole 12 of the valve body 4 is a or a plurality of nozzle openings 16 are provided.
  • the valve needle 6 has a valve needle tip 7 with a seat edge 14 and a valve needle seat 18. This valve needle seat 18 sits on a valve body seat 20 and thus seals the injection valve 2 with the nozzle openings 16 from.
  • the fuel passes through a fuel inlet 26 and a between the valve needle 6 and the valve body 4 lying annular pressure chamber 22 to the seat edge 14 and raised Valve needle 6 along the annular space 28 between the valve needle 6 and valve body shaft further on the blind hole 12th and the nozzle openings 16 in the combustion chamber of the internal combustion engine.
  • a Ring groove 32 Coaxial with the guide surface 10 in the valve body 4 is a Ring groove 32 is provided, which has a rectangular cross-section having a depth T.
  • the depth T of the annular groove 32 is in the embodiment shown about half a guide length L, which is the length of the axial guide the valve needle 6 with its valve needle guide 8 within characterized the hollow cylindrical guide surface.
  • the guide length L can typically be about 10 mm, so that the depth T is at a value of about 5 mm.
  • the depth T is one fifth of the guide length L of the valve needle guide 8, so that in this case the depth T is at a value of about 2 mm.
  • the annular groove 32 is connected via a connecting groove 34 with the Fuel inlet 26 in conjunction, so that in the annular groove 32nd at any time the full fuel pressure prevails.
  • the full fuel pressure no longer prevails, so that provided between the annular groove 32 and guide surface 10 hollow cylindrical wall portion 30 elastically inward in Direction to the valve needle guide 8 is deformed.
  • the sealing gap 11 is reduced near the leakage area 36, what the total fuel leakage through the Sealing gap 11 reduced.
  • FIG 2 shows a plan view of the fuel injection valve-according to Figure 1.
  • the annular contour of the annular groove 32 is illustrated.
  • the thickness D N of the annular groove 32 may correspond approximately to a thickness Dw of the wall portion 30.
  • the connecting groove 34 which provides a hydraulic connection between the fuel inlet 26 and the annular groove 32.
  • the thickness D W of the wall portion 30 and the thickness D N of the annular groove 32 may be approximately at a value of about 1 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (6)

  1. Soupape, notamment soupape injectrice de carburant pour un système d'injection à accumulateur haute pression d'un moteur à combustion interne, laquelle présente un corps de soupape (4) comportant un siège de corps de soupape (20) et une aiguille de soupape (6) guidée sur une longueur de guidage (L), dans le corps de soupape (4), à l'intérieur d'une surface de guidage stationnaire (10) en forme de cylindre circulaire et comportant un siège d'aiguille de soupape (18) destiné à commander une ouverture d'injection (16), ainsi qu'un conduit d'amenée de carburant (26) permettant d'alimenter en carburant le moteur à combustion interne,
       caractérisée en ce que,
       dans le corps de soupape (4) est prévu un réservoir à pression se trouvant sous haute pression et présentant la forme d'une rainure annulaire (32) disposée coaxialement à la surface de guidage (10), ladite rainure étant reliée au conduit d'amenée de carburant (26) par l'intermédiaire d'une rainure de jonction (34).
  2. Soupape selon la revendication 1,
       caractérisée en ce que
       la rainure annulaire (32) est séparée de la surface de guidage (10) du corps de soupape (4) par une partie de paroi (30) en forme de cylindre creux.
  3. Soupape selon la revendication 1 ou 2,
       caractérisée en ce que
       la rainure annulaire (32) présente une profondeur (T) qui correspond au moins à un cinquième de la longueur de guidage (L).
  4. Soupape selon l'une des revendications 1 à 3,
       caractérisée en ce qu'
       une liaison hydraulique est prévue entre un conduit d'amenée de carburant (26) d'un espace de pression (22) formé dans le corps de soupape (4) et la rainure annulaire (32).
  5. Soupape selon l'une des revendications 1 à 4,
       caractérisée en ce que
       la rainure annulaire (32) présente une épaisseur (DN) qui correspond au moins à un cinquième (1/5) du diamètre de la surface de guidage (10).
  6. Soupape selon l'une des revendications 1 à 5,
       caractérisée en ce que
       la partie de paroi (30) située entre le corps de soupape (4) et la rainure annulaire (32) présente une épaisseur (DW) qui correspond environ à l'épaisseur (DN) de la rainure annulaire (32).
EP02776723A 2001-09-27 2002-09-25 Soupape, en particulier soupape d'injection de carburant Expired - Lifetime EP1430218B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10147792A DE10147792C2 (de) 2001-09-27 2001-09-27 Kraftstoffeinspritzventil
DE10147792 2001-09-27
PCT/DE2002/003628 WO2003029642A1 (fr) 2001-09-27 2002-09-25 Soupape, en particulier soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1430218A1 EP1430218A1 (fr) 2004-06-23
EP1430218B1 true EP1430218B1 (fr) 2005-11-23

Family

ID=7700571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02776723A Expired - Lifetime EP1430218B1 (fr) 2001-09-27 2002-09-25 Soupape, en particulier soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US7066397B2 (fr)
EP (1) EP1430218B1 (fr)
JP (1) JP2005504226A (fr)
DE (2) DE10147792C2 (fr)
WO (1) WO2003029642A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4119812B2 (ja) * 2003-09-19 2008-07-16 ボッシュ株式会社 燃料噴射弁
JP4066959B2 (ja) * 2004-01-27 2008-03-26 株式会社デンソー 燃料噴射装置
US8075603B2 (en) 2008-11-14 2011-12-13 Ortho Innovations, Llc Locking polyaxial ball and socket fastener
US8322004B2 (en) * 2009-04-29 2012-12-04 Caterpilar Inc. Indirect laser induced residual stress in a fuel system component and fuel system using same
US8205598B2 (en) * 2010-02-08 2012-06-26 International Engine Intellectual Property Company, Llc Fuel injector nozzle
DE102010042688A1 (de) * 2010-10-20 2012-04-26 Robert Bosch Gmbh Kraftstoffinjektor
HUE026321T2 (en) * 2012-01-26 2016-05-30 Delphi Int Operations Luxembourg Sarl Fuel Injector Control Valve
WO2013162525A1 (fr) * 2012-04-24 2013-10-31 International Engine Intellectual Property Company, Llc Guide de vanne à siège à faible fuite
EP2733344A1 (fr) * 2012-11-19 2014-05-21 Caterpillar Motoren GmbH & Co. KG Élément de guidage d'aiguille
US9453526B2 (en) 2013-04-30 2016-09-27 Degen Medical, Inc. Bottom-loading anchor assembly

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1334939A (en) * 1971-04-13 1973-10-24 Barkas Werke Ifa Kom Fuer Kraf Fuel injection nozzles for internal combustion engines
DE2521339A1 (de) * 1975-05-14 1976-11-25 Uraca Pumpenfabrik Gmbh Spaltdichtung fuer die abdichtung hin- und hergehender kolben
JPS6187963A (ja) * 1984-10-08 1986-05-06 Kanesaka Gijutsu Kenkyusho:Kk 燃料噴射装置
US5899389A (en) * 1997-06-02 1999-05-04 Cummins Engine Company, Inc. Two stage fuel injector nozzle assembly
GB9904938D0 (en) * 1999-03-04 1999-04-28 Lucas Ind Plc Fuel injector
DE19914713C2 (de) * 1999-03-31 2003-10-23 Siemens Ag Druckbeaufschlagte Stelleinrichtung
DE19929881A1 (de) * 1999-06-29 2001-01-04 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19956830C2 (de) * 1999-11-25 2002-07-18 Siemens Ag Durchführung

Also Published As

Publication number Publication date
WO2003029642A1 (fr) 2003-04-10
US7066397B2 (en) 2006-06-27
JP2005504226A (ja) 2005-02-10
DE10147792A1 (de) 2003-04-24
US20040195350A1 (en) 2004-10-07
DE50205062D1 (de) 2005-12-29
EP1430218A1 (fr) 2004-06-23
DE10147792C2 (de) 2003-10-16

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