EP1492952B1 - Raccordement de fuite con u pour un injecteur de carburant - Google Patents

Raccordement de fuite con u pour un injecteur de carburant Download PDF

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Publication number
EP1492952B1
EP1492952B1 EP03724868A EP03724868A EP1492952B1 EP 1492952 B1 EP1492952 B1 EP 1492952B1 EP 03724868 A EP03724868 A EP 03724868A EP 03724868 A EP03724868 A EP 03724868A EP 1492952 B1 EP1492952 B1 EP 1492952B1
Authority
EP
European Patent Office
Prior art keywords
leakage
injector
connection
leakage connection
component
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
EP03724868A
Other languages
German (de)
English (en)
Other versions
EP1492952A1 (fr
Inventor
Dieter Marksteiner
Klaus Rübling
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
Priority to EP06015047A priority Critical patent/EP1722096B1/fr
Publication of EP1492952A1 publication Critical patent/EP1492952A1/fr
Application granted granted Critical
Publication of EP1492952B1 publication Critical patent/EP1492952B1/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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors

Definitions

  • the present invention relates to an injector with a leakage connection for the injection of fuel into a combustion chamber of an internal combustion engine.
  • a fuel supply system for internal combustion engines increasingly storage injection systems are used, which operate at very high injection pressures.
  • fuel is conveyed by means of a high-pressure pump into a fuel injector, from which fuel is injected into the combustion chamber of the internal combustion engine.
  • a fuel injector has an injection valve which is hydraulically opened or closed by a control valve by means of an applied fuel pressure.
  • the control valve is actuated by an actuator.
  • the leakage connection on the injector is formed by a stepped bore, into which a line with a connection nipple is introduced.
  • the connection nipple is secured to the fuel injector by means of a flexurally elastic securing element.
  • this arrangement is relatively expensive and includes a variety of individual components.
  • a leakage connection which comprises an integrally formed leakage nipple.
  • the leakage port includes a retainer to secure the leakage port to a separate injector component.
  • a Einstecknippel can be attached in the leakage hole of the leakage line .
  • a high-pressure connection is provided, on which a high-pressure line can be fastened by means of a holding device.
  • the insertion nipple has a component that, when the Einstecknippel is disposed on the leakage bore, is fixed in position by attaching a holding device of the high-pressure line from the high-pressure nozzle.
  • the connection of the leakage return line to a leakage connection at the fuel injector is achieved in that the leakage connection is formed integrally with an already existing component of the injector and a leakage nipple for connecting a leakage return line is integrally formed on the leakage connection.
  • the invention is thus at a already existing component of the injector with a corresponding component function nor the leakage connection with the function of connecting a leakage return line integrated. As a result, the number of components can be kept low.
  • the complex securing of a leakage nipple of the leakage return line in the leakage connection which is necessary in the state of the art can be dispensed with.
  • the leakage connection according to the invention is constructed such that two leakage nipples are integrally formed on the component of the injector with leakage connection.
  • the injector component has two leakage ports, so that a leak can be derived at different locations on the injector.
  • the two leakage nipples are arranged opposite each other by 180 °.
  • connection nipple are preferably arranged at an angle of approximately 45 ° to an injector main axis.
  • a recess is formed at a transition point between an internal injector leakage line and the leakage connection.
  • the recess is formed as a circumferential groove, which is covered by the injector component with integrated leakage connection.
  • the circumferential groove can of course also be formed in the injector component with leakage connection, or that a recess is provided both on the injector component with leakage connection and on the adjacent injector component, which then results in the assembled state, a circumferential channel.
  • the transition point is preferably sealed by means of at least one sealing ring.
  • the sealing ring can be arranged either in the injector component with leakage connection or the other injector component.
  • the injector preferably has a substantially vertically extending leakage collection bore, which is connected via a transverse bore with the leakage connection.
  • the injector component with integrated leakage connection is a coupling element between injector and a motor component, e.g. the cylinder head.
  • the coupling element is a centering sleeve or a damping component.
  • the centering sleeve thus serves on the one hand for centering the injector in a cylinder head of the internal combustion engine and has as a further function the connection function of the leakage return line.
  • the damping component then additionally has the connection function of the leakage return line.
  • the inner wall of the coupling element is designed as a sealing seat for an annular seal.
  • a secure seal the transition point between the coupling element and the injector is achieved.
  • leakage connections of different injectors are connected to one another such that a series-connected or arranged leakage return line is formed.
  • at least one injector component having a leakage connection has to have a plurality of leakage connections, and one of these leakage connections is finally connected to the leakage return line in the fuel storage container.
  • the injector components are each formed with two leakage connections, so that a series connection with short paths can be realized in a simple manner.
  • the component is preferably made of plastic.
  • the injector component with integrated leakage connection can be easily produced, for example by injection molding. It is noted, however, that the leak connector may also be made of metal.
  • this preferably has an undercut.
  • the leakage return line is sufficiently secured to the leakage nipple and there is a simple and quick assembly and disassembly of the leakage return line given.
  • the present invention relates to a leakage return device with a leakage connection according to the invention.
  • a leakage port for an injector for injecting fuel comprises an integrally formed leakage nipple for connecting a leakage return line and an integrally formed holding device.
  • the holding device allows a fixation of the leakage connection to another, already existing Injektorbauteil.
  • the integrally formed holding device of the leakage connection has two clamping arms, which enable a non-positive and positive connection with the existing injector component.
  • the clamping arms have a fixing area and a mounting auxiliary area.
  • the fixing area serves for fastening the leakage connection to the already existing injector component.
  • the clamping arms are arranged laterally on a leakage drain of the leakage connection.
  • a connection point between the clamping arms and the leakage outlet also serves as a pivot point for the clamping arms.
  • the connection point continues to serve to divide the clamping arms into the fixing area and the mounting auxiliary area.
  • the leakage connection T-shaped with two integrally formed leakage nipples is formed. This enables a redundant discharge of the leakage or facilitates a series connection of multiple leakage ports of different injectors.
  • the injector component to which the leakage port is fixable a fuel supply port.
  • a fuel supply port This allows a particularly compact design of the leakage connection according to the invention.
  • the fixing of the clamping arms is formed flattened perpendicular to the axial direction of the fuel supply, so that attachment of the clamping arms on the flattened fixation, for example by means of a mother can be done.
  • the leakage connection allows a small number of components, which significantly reduces the assembly costs. Furthermore, no complicated fastening devices for fastening the leakage connection are necessary. In a fixation of the leakage connection to a fuel supply nozzle, a particularly compact design with significant space advantages can continue to be realized.
  • the injector component 1 with integrated leakage connection comprises a centering sleeve 2 and a leakage connection 3 formed integrally thereon.
  • the centering sleeve 2 serves to center the fuel injector 6 in a bore in a cylinder head 13 of an internal combustion engine.
  • the leakage connection 3 comprises an integrally formed nipple 4.
  • the leakage connection 3 is formed at an angle ⁇ of approximately 45 ° to an injector main axis X-X.
  • a corresponding recess 19 for receiving the leakage connection 3 is formed in the cylinder head 13.
  • the leakage port 3 includes the nipple 4 integrally formed thereon and an inner leakage hole 5. Further, an undercut 12 is provided to securely fix a leakage return pipe (not shown).
  • a vertically extending leakage collecting bore 8 is formed in the injector 6 in which the fuel return quantity of the injector and leakages due to gaps between the injector components converge.
  • a horizontal transverse bore 7 goes to the outside of the injector 6.
  • a peripheral groove 11 is formed in the injector 6 in the region of the transverse bore 7.
  • the injector component 1 is arranged to guide the leakage flow in the leakage return line.
  • a sealing ring 9 10 is arranged. The accumulated in the vertical leakage collection hole 8 leakage is thus guided via the horizontal transverse bore 7 and the circumferential groove 11 to the leakage port 3 and from there into the leakage return line.
  • the Injektorbauteil 1 comprises both the centering 2 and the integrally formed therewith leakage connection 3 with integrated nipple 4. According to the invention, therefore, the number of components can be kept low, while a secure connection can be obtained by providing the nipple 4 for attachment of a leakage return line. By providing the undercut 12, a leakage return line placed over the nipple 4 is securely fastened to the leakage connection 3. Thus, a quick assembly or disassembly can be achieved.
  • a clamping component such as, for example, a clamp, are secured in the region of the undercut from the outside to the leakage return line to clamp the leakage return line to the undercut 12.
  • FIGS. 4 to 6 An injector component 1 with integrated leakage connection 3 according to a second exemplary embodiment of the present invention will be described with reference to FIGS. 4 to 6.
  • the same or functionally identical parts are again denoted by the same reference numerals.
  • the injector component 1 according to the second exemplary embodiment likewise comprises a centering sleeve 2.
  • a first leakage connection 3 and a second leakage connection 14 are formed with an integrally formed nipple 15.
  • the Injektorbauteil 1 according to the second embodiment comprises two integrally formed leakage ports 3 and 14.
  • the two leakage ports 3 and 14 are in this case arranged 180 ° opposite to each other.
  • An inner wall 16 of the centering sleeve 2 is formed as a contact surface for two sealing rings, which seal a formed on the injector 6, circumferential groove 11.
  • the individual injectors 6 are each fastened to the cylinder head 13 by means of clamping claws 18.
  • the clamping claw 18 fixes the injector 6 in the cylinder head 13 with respect to axial displacements.
  • the sleeves 2 are designed such that they can compensate for installation tolerances with respect to a fixation in the axial direction X-X.
  • the injector component 1 Due to the design of the injector component 1 with two leakage connections 3 and 14, it is possible, as can be seen in particular from FIGS. 5 and 6, to form a leakage return in a series connection.
  • the resulting at the injector 6 leakage is discharged through the circumferential groove 11 to both the first leakage port 3 and the second leakage port 14.
  • the leakage From the second leakage connection 14, the leakage is guided via a leakage return line 17 to a first leakage connection 3 'of a second injector 6'.
  • the leakage is conducted on to a second leakage connection 14' of the second injector 6 'via a circumferential groove 11' (FIG. 5) and via the leakage line 17 'to a third injector 6 ".
  • the leakage is conducted in the same way via the leakage return line 17 "to a fourth injector 6" and guided from its second leakage connection 14 "'back to a fuel tank.
  • This design of the arrangement of several leakage ports of different injectors in series can be a particularly compact design 6, the leakage can be dissipated via the first leakage connection 3 of the first injector 6 and the second leakage connection 14 '' of the fourth injector 6 ''
  • the individual injectors result in very short cable routes.
  • the inventive combination of second functions in a component namely a connection function for a leakage line and in the embodiments of a centering function for the injector, fewer components than in the prior art are needed. This reduces the assembly effort, and also the manufacturing cost can be reduced. Furthermore, in particular by arranging the leakage return lines in series, a particularly compact leakage device can be provided. This results in space advantages over the prior art.
  • the present invention relates to a leakage port 3 for an injector 6 for injecting fuel into a combustion chamber of an internal combustion engine.
  • the leakage connection 3 is formed integrally with an injector component 1.
  • a leakage nipple 4 for connecting a leakage return line 17 is integrally formed on the leakage connection 3.
  • a holding device consisting of a first clamping arm 28 and a second clamping arm 29 is integrally formed with the leakage connection 23 at the leakage connection.
  • the leakage connection 23 is T-shaped.
  • the leakage connection 23 comprises a leakage drain 26 which is fastened in the injector and opens into a branching line 27 which has an integrally formed connection nipple 24, 25 at each of its two ends.
  • the leakage port 23 has a substantially T-shape.
  • the two clamping arms 28, 29 are formed integrally with the leakage connection 23 on the circumference of the branching line 27 directed toward the injector.
  • the first clamping arm 28 has a fixing region 30 and an auxiliary mounting region 31.
  • the second clamping arm 29 likewise has a fixing region 32 and an auxiliary mounting region 33.
  • the clamping arms 28, 29 are pivotally mounted. This can be realized, for example, such that the leakage connection 23 is made entirely from a plastic by means of injection molding.
  • the mounting auxiliary areas 31, 33 are used during assembly in such a way that they are moved against each other by compression in the direction of the arrows A and B, respectively.
  • the fixing regions 30 and 32 of the clamping arms 28 and 29 spread apart, so that a simple mounting of the leakage connection 23 is made possible.
  • the spreading of the fixing regions 30 and 32 takes place by means of a lever principle, so that only small assembly forces are necessary.
  • FIG. 8 shows the assembled state of the leakage connection 23.
  • the clamping arms 28, 29 surround a high-pressure feed connection 21.
  • the clamping arms 28, 29 are fixed by means of a nut 22 to the supply connection 21.
  • the clamping arms 28, 29 are formed flattened perpendicular to the axial direction of the supply nozzle 21 at its fixing region 30, 32.
  • a secure attachment of the leakage connection to the supply nozzle 21 can be made possible.
  • attachment to the supply nozzle 21 is still still a certain extent existing Drehauscardicardi and fixing the position for the leakage connection 23 possible.
  • the clamping arms 28, 29 engage in the assembled state in a threaded groove formed on the feed port 21.
  • the leakage connection 23 can also be dismantled without destruction from the supply pipe 21, for example, a repair or the like. to enable the injector 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (11)

  1. Injecteur comprenant un raccord de fuite pour l'injection du carburant dans la chambre de combustion d'un moteur à combustion interne, le raccord de fuite (3 ; 14) étant réalisé d'une seule pièce avec un élément d'injecteur (1) et comprenant un manchon de raccordement de fuite (4 ; 15) formé intégralement pour raccorder une conduite de retour de fuite (17), caractérisé en ce qu'un évidement (11) est formé dans l'injecteur (6) à un endroit de transition entre un alésage de fuite (5) dans la raccord de fuite (3) et un alésage d'admission de fuite (7) dans l'injecteur, et que l'évidement (11) est configuré comme une gorge entourant complètement l'injecteur.
  2. Injecteur avec un raccord de fuite selon la revendication 1, caractérisé en ce que l'élément d'injecteur (1) comprend un premier raccord de fuite (3) et un deuxième raccord de fuite (14).
  3. Injecteur avec un raccord de fuite selon la revendication 1, caractérisé en ce que l'endroit de transition entre l'alésage de fuite (5) dans le raccord de fuite (3) et l'alésage d'admission de fuite (7) dans l'injecteur (6) est étanchéifié au moyen d'au moins une bague d'étanchéité (9, 10).
  4. Injecteur avec un raccord de fuite selon la revendication 3, caractérisé en ce que la bague d'étanchéité (9, 10) est disposée dans l'injecteur (6) ou dans l'élément d'injecteur (1) dans lequel le raccord de fuite est intégré.
  5. Injecteur avec un raccord de fuite selon l'une des revendications précédentes, caractérisé en ce qu'un alésage de collecte de fuites à extension verticale est formé dans l'injecteur (6).
  6. Injecteur avec un raccord de fuite selon l'une des revendications précédentes, caractérisé en ce que l'élément d'injecteur est un élément de couplage (2) situé entre l'injecteur et un élément de moteur (13).
  7. Injecteur avec un raccord de fuite selon la revendication 6, caractérisé en ce que l'élément de couplage est une douille de centrage (2) pour centrer l'injecteur (6) dans une culasse (13) du moteur à combustion interne, ou un élément amortisseur pour amortir des oscillations transmises de la culasse (13) à l'injecteur (6).
  8. Injecteur avec un raccord de fuite selon la revendication 6 ou 7, caractérisé en ce qu'une paroi interne (16) de l'élément de couplage est aménagée comme siège de joint pour un joint annulaire.
  9. Injecteur avec un raccord de fuite selon l'une des revendications 2 à 8, caractérisé en ce que des raccords de fuite (3, 3', 3", 3"') de différents injecteurs (6, 6', 6", 6"') sont reliés entre eux pour former une conduite de retour de fuites disposée en série.
  10. Injecteur avec un raccord de fuite selon l'une des revendications précédentes, caractérisé en ce que l'élément d'injecteur (1) est fabriqué à partir d'une matière synthétique.
  11. Injecteur, comprenant un dispositif de retour de fuites pour le retour d'une fuite de carburant d'un injecteur de carburant, contenant un raccord de fuite selon l'une des revendications précédentes.
EP03724868A 2002-04-11 2003-04-11 Raccordement de fuite con u pour un injecteur de carburant Expired - Lifetime EP1492952B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06015047A EP1722096B1 (fr) 2002-04-11 2003-04-11 Injecteur de carburant avec un raccordement de fuite conçu

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10215980 2002-04-11
DE10215980A DE10215980B4 (de) 2002-04-11 2002-04-11 Leckageanschluss für einen Kraftstoffinjektor
PCT/DE2003/001239 WO2003087567A1 (fr) 2002-04-11 2003-04-11 Raccordement de fuite conçu pour un injecteur de carburant

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP06015047A Division EP1722096B1 (fr) 2002-04-11 2003-04-11 Injecteur de carburant avec un raccordement de fuite conçu

Publications (2)

Publication Number Publication Date
EP1492952A1 EP1492952A1 (fr) 2005-01-05
EP1492952B1 true EP1492952B1 (fr) 2007-01-24

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP03724868A Expired - Lifetime EP1492952B1 (fr) 2002-04-11 2003-04-11 Raccordement de fuite con u pour un injecteur de carburant
EP06015047A Expired - Fee Related EP1722096B1 (fr) 2002-04-11 2003-04-11 Injecteur de carburant avec un raccordement de fuite conçu

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP06015047A Expired - Fee Related EP1722096B1 (fr) 2002-04-11 2003-04-11 Injecteur de carburant avec un raccordement de fuite conçu

Country Status (5)

Country Link
US (2) US20050045154A1 (fr)
EP (2) EP1492952B1 (fr)
JP (1) JP2005522630A (fr)
DE (3) DE10215980B4 (fr)
WO (1) WO2003087567A1 (fr)

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Also Published As

Publication number Publication date
EP1492952A1 (fr) 2005-01-05
EP1722096B1 (fr) 2008-11-26
US20050045154A1 (en) 2005-03-03
DE50306380D1 (de) 2007-03-15
DE50310842D1 (de) 2009-01-08
DE10215980A1 (de) 2003-10-30
US20070283932A1 (en) 2007-12-13
US7475674B2 (en) 2009-01-13
WO2003087567A1 (fr) 2003-10-23
JP2005522630A (ja) 2005-07-28
EP1722096A3 (fr) 2006-11-29
EP1722096A2 (fr) 2006-11-15
DE10215980B4 (de) 2008-03-27

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