EP1346146B1 - Injecteur pour un moteur a combustion interne - Google Patents

Injecteur pour un moteur a combustion interne Download PDF

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Publication number
EP1346146B1
EP1346146B1 EP01985803A EP01985803A EP1346146B1 EP 1346146 B1 EP1346146 B1 EP 1346146B1 EP 01985803 A EP01985803 A EP 01985803A EP 01985803 A EP01985803 A EP 01985803A EP 1346146 B1 EP1346146 B1 EP 1346146B1
Authority
EP
European Patent Office
Prior art keywords
sealing ring
injector
projection
nozzle body
nozzle
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
EP01985803A
Other languages
German (de)
English (en)
Other versions
EP1346146A2 (fr
Inventor
Uwe Lingener
Marion Braun
Jürgen Rink
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP1346146A2 publication Critical patent/EP1346146A2/fr
Application granted granted Critical
Publication of EP1346146B1 publication Critical patent/EP1346146B1/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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine

Definitions

  • the present invention relates to an injector for a Internal combustion engine according to the preamble of claim 1.
  • injection systems are increasingly used, where with a very high injection pressure is used.
  • Such injection systems are common rail systems (for diesel engines) and HPDI injection systems (for gasoline engines).
  • HPDI injection systems for gasoline engines.
  • injection systems use a high pressure pump to fuel the fuel in a common to all cylinders of the engine Pressure accumulator promoted from which the injectors to the individual cylinders can be supplied with fuel.
  • an injector usually in a mounting hole in one Cylinder head of the internal combustion engine to be supplied with fuel used. The location hole opens into the Combustion chamber of the internal combustion engine so that the fuel over the injector can be injected directly into the combustion chamber can.
  • Such an injector which acts as a fuel injector is used, for example, is known from EP 0 418 271 B1 and has a cylindrical valve body, the Outside diameter forming a ring shoulder in Direction of an injection opening of the fuel injection valve reduced.
  • the valve body is by means of a axially acting on the ring shoulder clamping nut against a holding body clamped and in a stepped mounting hole in the Housing of the internal combustion engine used, with their im Diameter smaller section in the combustion chamber of the internal combustion engine empties.
  • the sealing of the combustion chamber side Bore area of the receiving bore in the housing of the internal combustion engine takes place by means of a between the ring face the clamping nut and the housing shoulder of the location hole clamped sealing ring.
  • the sealing ring axially secured on the shaft of the Arrange valve body so that the sealing ring together with the valve body of the injection valve from the location hole can be removed.
  • the sealing ring is by means of a Frictionally attached to the valve body, the Frictional engagement is preferably only built up in partial areas, which are distributed symmetrically over the circumference. These subareas are characterized by three radially inward projections the inner wall surface of the sealing ring provided on the Valve body are pressed on.
  • Injectors for internal combustion engines are the invention the task of providing an injector in which the sealing ring is securely attached to the injector on the one hand and on the other hand, can be replaced quickly and easily.
  • Injector for an internal combustion engine Arranged substantially annular projection of an outer peripheral surface of the sealing ring in sections. This forms an inner peripheral surface of the annular projection a holding contour for the essentially disc-shaped Sealing ring.
  • the holding contour is on the outer peripheral surface of the sealing ring adjusted so that the sealing ring over a fit of the holding contour in the area of the nozzle body section is appropriate. Because of the attachment by means of the essentially annular projection is the sealing ring secured in a simple manner and can be used for disassembly removed from the cylinder head together with the injector become.
  • the sealing ring can be used during assembly not get lost in the cylinder head either because it Projection is fixed in the region of the nozzle body section.
  • the injector and the sealing ring are all in one Housing of the internal combustion engine can be assembled and removed again removable, so that the assembly or disassembly considerably simplified.
  • the sealing ring is on its over the ledge protruding section easily accessible from the outside and thus when disassembling quickly and easily from the holding contour removable. This is a quick and easy exchange of the sealing ring on the injector.
  • the nozzle body portion on a nozzle nut or one Nozzle body collar of the nozzle body is provided.
  • the sealing ring offers advantages if the Projection at an end portion of the nozzle clamping nut or the nozzle body collar, in particular a nozzle body shoulder of the nozzle body collar is arranged.
  • the Projection is formed, for example, that along an end face facing the combustion chamber the nozzle clamping nut or the nozzle body shoulder has a circular shape Recess is formed. Can in this recess the sealing ring can simply be pressed in.
  • the projection on the nozzle body section is configured in this way be that a sleeve is attached to the nozzle clamping nut, for example shrunk on the end section of the nozzle clamping nut which protrudes beyond the end portion and thereby forms the holding contour for the sealing ring.
  • a groove or an incision to attach in the tab is the Intervention of a tool for dismantling or changing the Sealing rings possible.
  • the tool can pass through the groove immediately brought up to the outer peripheral surface of the sealing ring so that the sealing ring can easily be removed with the tool the holding contour is removed and then replaced can.
  • the sealing ring for a secure attachment of the sealing ring to the injector has proven to be beneficial in certain applications, if the sealing ring by means of at least one fastening element is attached to the nozzle body portion. Securing the sealing ring using the additional fastening element is particularly advantageous if between the annular projection and the inserted in the holding contour Seal ring game exists. If there is a game between the projection and the sealing ring are guaranteed by the fastening element a secure connection of the sealing ring with the injector nozzle body portion.
  • a fastener can be used, for example, with a pin or notch pin which the sealing ring on the end face of the nozzle body portion is appropriate.
  • the sealing ring for example by means of a bayonet catch with the front end portion of the nozzle body portion connected become.
  • the sealing ring at least one tab-shaped holding element to arrange.
  • tab-shaped Holding member on the outer peripheral surface of the nozzle body portion bent and connected to this. This is one secure fastening of the sealing ring to the outer peripheral surface of the nozzle body section guaranteed.
  • the sealing ring at least has an inner chamfer.
  • the inner chamfer which preferably has a punch burr, an axial securing of the sealing ring on the nozzle body achievable.
  • the sealing ring has at least one outer ridge. The sealing ring can be secured by an excess of the outer degree attach in the holding contour formed by the projection.
  • Fig. 1 is a cross-sectional view of the invention Injector shown in the area of its nozzle body 4.
  • the injector consists of an upper, cylindrical injector body, which is not shown in Fig. 1, and that arranged, lower nozzle body 4.
  • the nozzle body 4 is attached to the upper one annular paragraph 10 attacking nozzle clamping nut 14 axially clamped against the injector body so that the nozzle body 4 held on the injector body via the nozzle clamping nut 14 becomes.
  • a nozzle needle 16 is provided, which has a nozzle needle guide 18 is guided tightly in the nozzle body 4.
  • the nozzle needle guided axially in the nozzle body 4 16 via a stroke movement, the nozzle opening 6 in the injector open or close.
  • the injector is in a stepped receiving bore 20 in a schematically shown Cylinder head 22 of the fuel to be supplied Internal combustion engine used.
  • the ends in the outer diameter reduced area of the receiving bore 20 in the Combustion chamber of the internal combustion engine, so that in the Receiving bore 20 introduced nozzle body 8 and the at its free end arranged nozzle opening 6 fuel injected into the combustion chamber, not shown, of the internal combustion engine can be.
  • a sealing ring 28 is arranged on the nozzle body 8th of the injector.
  • the nozzle clamping nut 14 instructs their front side facing the combustion chamber of the internal combustion engine
  • End portion 24 has an integrally formed annular projection 30 on the sealing ring 28 on its outer peripheral surface 31 surrounds in areas and on a portion of the outer peripheral surface 31 is present.
  • the projection 30 as a thin-walled, cylindrical extension of the nozzle clamping nut 14 formed in the direction of the longitudinal extent of the injector.
  • the projection 30 is sleeve-shaped formed and molded onto the nozzle clamping nut 14.
  • the nozzle clamping nut 14 comprises the nozzle body section 2, so that the projection in the area of the nozzle body section 2 is arranged.
  • the provided on the front end portion 24 circumferential projection 30 forms a bracket or Retaining contour for the sealing ring 28 from between the injector and the cylinder head 22 is clamped.
  • the sealing ring 28 is in sections on an inner peripheral surface of the annular Projection 30 and is a frictional engagement, Press or adhesive fit in the ring-shaped holding contour of the projection 30 withheld.
  • the sealing ring 28 is a fit in the area enclosed by the projection 30 clamped at the front end portion 24 or pressed.
  • the sealing ring 28 is in its position the nozzle clamping nut 14, which comprises the nozzle body section 2, fixed. This stands in the by the lead 30 trained retaining contour inserted sealing ring 28 over a free end of the projection 30 in the direction of the combustion chamber, so that through the protruding section of the sealing ring 28 a sealing surface between the nozzle clamping nut 14 and the housing shoulder 26 of the cylinder head 22 is provided.
  • a groove 32 is provided.
  • a tool can be introduced.
  • To access the sealing ring 28 along the outer peripheral surface 31 to ensure the nozzle clamping nut 14 also several grooves 32, for example as incisions or Recesses, side by side over the circumference of the projection 30 can be provided distributed.
  • FIG. 2 shows a section of the nozzle clamping nut 14 in the area of the nozzle body section 2 of the injector according to the invention shown with an inserted sealing ring 28 in cross section.
  • the combustion chamber of the in the installed state The internal combustion engine is facing, the ring-shaped Projection 30.
  • the projection 30 is sleeve-shaped on the molded end portion 24 of the nozzle nut 14. This creates an annular shoulder 40, which as Contact surface for the sealing ring 28 is used.
  • the sealing ring 28 When assembling the sealing ring 28 is inserted into the recess 36 such that the sealing ring 28 on a portion of its surface on the annular shoulder 40 and along a portion of it Outer peripheral surface on the annular inner peripheral surface of the Projection 30 is present.
  • the sealing ring 28 is a part of the sealing ring 28 over the projection 30 so that a sealing surface 42 on the end portion 24 of the nozzle nut 14 provided is.
  • the sealing ring 28 thus extends over the lower one free end of the nozzle clamping nut 14 also.
  • Fig. 3 shows a schematic cross-sectional view of a Part of the injector according to the invention after a third Embodiment.
  • This variant corresponds to Essentially that of FIG. 1, however, has the opposite Difference in that the annular projection 30 on one Nozzle body collar 44 of the nozzle body section 2 is arranged is.
  • the projection 30 is on an annular nozzle body shoulder 46 of the nozzle body collar 44 formed.
  • the Sealing ring 28 is formed in the projection 30 Holding contour inserted and in through the nozzle body shoulder 46 and the inner peripheral surface of the protrusion 30 are formed Recess 36 pressed into the nozzle body collar 44.
  • the assembly of the sealing ring 28 in the area of the nozzle body section 2 of the injector both on the nozzle clamping nut 14 and directly on the Nozzle body collar 44 take place.
  • the sealing ring 28 is by means of Projection 30 can be easily and securely preassembled on the injector and can be quickly and easily, for example in the event of wear, be replaced.
  • the pre-assembled Sealing ring 28 at the same time as the injector in the receiving bore 20 of the cylinder head 22 are used, whereby assembly is considerably simplified.

Landscapes

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

Claims (6)

  1. Injecteur pour un moteur à combustion interne avec un corps d'injecteur en
       forme de cylindre, un corps de buse (4) fixé au corps d'injecteur et une bague d'étanchéité (28) qui est disposée sur une partie du corps de buse (2), caractérisé en ce que,
       dans une zone de la partie du corps de buse (2) une partie saillante (30) sensiblement annulaire est prévue qui recouvre une surface périphérique extérieure (31) de la bague d'étanchéité (28) de façon partielle.
  2. Injecteur selon la revendication 1, caractérisé en ce que la partie saillante (30)
       est disposée sur un écrou de serrage de la buse (14) ou sur un collet du corps de buse (44) de la partie du corps de buse (2).
  3. Injecteur selon la revendication 1 ou 2, caractérisé en ce qu'au moins une
       rainure (32) est prévue dans la partie saillante (30).
  4. Injecteur selon l'une quelconque des revendications précédentes, caractérisé    en ce que la bague d'étanchéité (28) est raccordée au moyen d'au moins un élément de fixation à la partie du corps de buse (2).
  5. Injecteur selon la revendication 4, caractérisé en ce qu'un élément de
       maintien en forme de languette est prévu sur la surface périphérique de la bague d'étanchéité (28).
  6. Injecteur selon l'une quelconque des revendications précédentes, caractérisé    en ce que la bague d'étanchéité (28) comprend au moins un biseau intérieur, un biseau extérieur, une bavure intérieure et/ou une bavure extérieure.
EP01985803A 2000-12-27 2001-12-20 Injecteur pour un moteur a combustion interne Expired - Lifetime EP1346146B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10065437A DE10065437A1 (de) 2000-12-27 2000-12-27 Injektor für eine Brennkraftmaschine
DE10065437 2000-12-27
PCT/DE2001/004875 WO2002052147A2 (fr) 2000-12-27 2001-12-20 Injecteur pour un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1346146A2 EP1346146A2 (fr) 2003-09-24
EP1346146B1 true EP1346146B1 (fr) 2004-08-04

Family

ID=7669268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01985803A Expired - Lifetime EP1346146B1 (fr) 2000-12-27 2001-12-20 Injecteur pour un moteur a combustion interne

Country Status (3)

Country Link
EP (1) EP1346146B1 (fr)
DE (2) DE10065437A1 (fr)
WO (1) WO2002052147A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2893364A1 (fr) * 2005-11-15 2007-05-18 Renault Sas Injecteur de carburant dans un moteur diesel et moteur diesel pourvu de tels injecteurs

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1408264A (fr) * 1964-06-30 1965-08-13 Simca Ind Joint d'étanchéité pour injecteurs notamment pour moteurs à combustion interne
DE3908796A1 (de) * 1988-06-06 1989-12-14 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE19605956A1 (de) * 1996-02-17 1997-08-21 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JPH09242647A (ja) * 1996-03-06 1997-09-16 Zexel Corp 燃料噴射ノズルの取付構造
DE19834475A1 (de) * 1998-07-31 2000-02-03 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen

Also Published As

Publication number Publication date
EP1346146A2 (fr) 2003-09-24
DE50103161D1 (de) 2004-09-09
WO2002052147A2 (fr) 2002-07-04
DE10065437A1 (de) 2002-07-25
WO2002052147A3 (fr) 2002-09-06

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