EP1502022B1 - Tuyau de distribution de carburant pour dispositif d'injection de carburant, en particulier pour des systemes a rail commun - Google Patents

Tuyau de distribution de carburant pour dispositif d'injection de carburant, en particulier pour des systemes a rail commun Download PDF

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Publication number
EP1502022B1
EP1502022B1 EP03729864A EP03729864A EP1502022B1 EP 1502022 B1 EP1502022 B1 EP 1502022B1 EP 03729864 A EP03729864 A EP 03729864A EP 03729864 A EP03729864 A EP 03729864A EP 1502022 B1 EP1502022 B1 EP 1502022B1
Authority
EP
European Patent Office
Prior art keywords
sealing body
fuel distribution
pipe
distribution pipe
transmission element
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 - Fee Related
Application number
EP03729864A
Other languages
German (de)
English (en)
Other versions
EP1502022A1 (fr
Inventor
Eckbert Zander
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 EP1502022A1 publication Critical patent/EP1502022A1/fr
Application granted granted Critical
Publication of EP1502022B1 publication Critical patent/EP1502022B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails

Definitions

  • the invention relates to a fuel distribution pipe for motor vehicle injectors, in particular for common rail systems, which consists of a drawn, rolled or forged pipe whose interior forms a high-pressure accumulator for receiving fuel, are connected to the pressure lines, each via a transverse bore lead into the interior of the tube, and which has at least one end face an end closure with a sealing body, wherein the sealing body is pressed sealingly by a force-transmitting element with threaded to a mating contact surface of the tube.
  • Such a fuel distribution pipe is already known from EP 0 866 221 A1.
  • One end face of the known distributor tube-the other end face usually serves to connect to a high-pressure pump-is sealed by a sealing body, in particular spherical or spherical, which is pressed against a contact surface in the fuel distribution tube by a threaded plug arranged axially in series with it.
  • the fuel rail is conventionally made from a forging, be molded onto the connection connections for the attachment of pressure lines.
  • the distribution paths are created by drilling, ie it is introduced a longitudinal bore into which guided through the connection connections cross-holes.
  • the interior space can be made much easier.
  • a forged and drilled fuel distributor also results in a higher strength of the tube despite lower wall thicknesses.
  • the object of the present invention is to further develop the aforementioned fuel distribution pipe in such a way that an optimization of the stress conditions at the intersection edges is made possible.
  • the problematic stresses associated with the structural conditions should be reducible at the intersection edges, even with a given space.
  • the invention is based first of the consideration that the resulting from the internal pressure mechanical stresses can be superimposed on other voltages.
  • these are stresses which result from the sealing force at the connection connection of a pressure line and, on the other hand, stresses which come from the sealing force at the end closure.
  • the voltages emanating from a connection connection are low in magnitude and can be kept low by a sufficiently large distance between the local contact surface and the intersection edge.
  • this voltage component is currently not limiting.
  • the voltage component resulting from the end closure has proved to be significant. It could basically be reduced by reducing the sealing force, which is practically impossible for safety reasons. Increasing the distance between the sealing surface and the nearest intersecting edge thus appears to offer a better alternative. For a given connection position for the pressure line, however, this would inevitably lead to an extension of the fuel distribution pipe.
  • the sealing body and the force transmission element are therefore not arranged axially in series, but at least partially parallel, in order to save axial space.
  • a given space it is thus possible to increase the distance between the contact surface of the sealing body and the intersection edge of the adjacent transverse bore and thereby reduce the stresses caused by the end closure at the critical point of the tube - the nearest intersection edge.
  • it opens, if you accept it the previous voltages, even the ability to reduce the axial length of the fuel distribution pipe.
  • a preferred, easy to manufacture and to be mounted embodiment can be achieved in that the force transmission element is designed as a threaded cap and screwed into a pipe internal thread, and that the cap bottom of the threaded cap abuts the side facing away from the contact surface of the sealing body.
  • FIG 1 shows a section of a known fuel distribution pipe, which substantially corresponds to the embodiment of Figure 10 in the aforementioned EP 0 866 221 A1.
  • the fuel distributor consists of a drawn or rolled tube 1.
  • the interior (the "longitudinal bore") of the tube 1 forms a high-pressure accumulator 2, open into the transverse bores 3, which are each in communication with a pressure line 4.
  • the pressure lines 4 are each connected to a connection 5 to the pipe 1.
  • the diameter of the transverse bore 3 corresponds approximately to the clear diameter of the pressure line 4, so that practically this opens directly into the high-pressure accumulator 2.
  • At the Bohrungsverschneidung between the longitudinal bore and the transverse bore 3 is an intersecting edge 6 is formed.
  • terminal connection 5 Shown in Figure 1 is that terminal connection 5, and thus also the intersection edge 6, which is the contact surface 8 closest. Due to the arrangement of the threaded pin 9 and the sealing body 7 axially in succession, the contact surface 8 is arranged relatively far in the interior of the tube and thus also in relative proximity to the intersection edge 6, which is therefore exposed to a great extent the unfavorable effects of the sealing force, the emanate from the contact surface 8.
  • FIG. 2 shows a fuel distribution pipe not according to the invention, in which the end closure of the pipe 1 is ensured by a sealing body 7 which is fixed by a threaded cap 10.
  • the threaded cap 10 has at its wings, more precisely: on the inside of its cylindrical part, an internal thread, while the tube 1 has a corresponding external thread 11.
  • the sealing body 7 is directly, optionally with tolerance compensation, on the cap base 12 of the threaded cap 10 at.
  • the wings of the threaded cap 10 extend as can be seen, over a substantial part of the axial extent of the sealing body 7.
  • the material and the thickness of the cap base 12 can be selected depending on the specific circumstances.
  • the cap base 12 may be integrally connected to the side of the sealing body 7 facing away from the contact surface 8.
  • the sealing body 7 can not only be designed as a sealing ball which can be produced with little effort, as shown in the figures, but also, for example, with a first end face which is convex or spherical towards the interior and with a second end face flat with the force transmission element 10.
  • additional axial space can optionally be saved.
  • advantageously can be produced with little effort, cold-impacted power transmission element use.
  • the power transmission element is, as shown in Figure 3A, designed as a threaded plug 13 with a dense body side recess 14 and be screwed into a pipe internal thread 15.
  • the sealing body 7 is taken to save space with a portion of its axial length in the recess 14, the dense height is thus enclosed in this case by the threaded plug 13 downright.
  • the embodiment according to FIG. 3B, in which the threaded cap 18 is screwed into a tube internal thread differs above all from a geometric point of view (larger radius) from the embodiment according to FIG. 3A.
  • 3A and 3B are necessary for the introduction of force when screwing in the power transmission element 10, 13, and 18 openings or areas.
  • outer key surfaces or it may be a rear insertion similar to that in Figure 1, may be provided.

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 (3)

  1. Tube de distribution de carburant pour dispositifs d'injection de véhicules automobiles, en particulier pour systèmes à rampe commune,
    - qui est composé d'un tube étiré, laminé ou forgé (1) dont l'espace intérieur forme un accumulateur de haute pression (2) destiné à contenir du carburant,
    - auquel sont raccordées des conduites de pression (4) qui débouchent dans l'espace intérieur, par l'intermédiaire d'un perçage transversal (3) du tube (1) pour chacune,
    - qui présente, au moins à un côté frontal, une fermeture terminale comprenant un corps de fermeture étanche (7), le corps de fermeture étanche (7) étant appliqué à joint étanche contre une surface de portée (8) du tube (1) qui y est adaptée par un élément de transmission de force (9, 10, 13) muni d'un pas de vis, et
    que le corps de fermeture étanche (7) et l'élément de transmission de force (10, 13, 18) sont disposés au moins en partie en parallèle entre eux dans la direction axiale,
    caractérisé en ce que l'élément de transmission de force est constitué par un bouchon à pas de vis (13) présentant un évidement (14) sur le côté du corps de fermeture étanche, et est vissé dans un filetage intérieur (15) du tube, en ce que le corps de fermeture étanche (7) est logé dans l'évidement (14) sur une partie de sa longueur axiale, et la hauteur de joint étanche du corps de fermeture étanche (7) est entourée par le bouchon à pas de vis (13).
  2. Tube de distribution de carburant selon la revendication 1,
    caractérisé en ce que le corps de fermeture étanche (7) est constitué par une bille ou est conformé avec un côté frontal de conformation bombée ou sphérique vers l'espace intérieur.
  3. Tube de distribution de carburant selon la revendication 1 ou 2,
    caractérisé en ce que l'élément de transmission de force (10, 13) est fait d'acier frappé à froid.
EP03729864A 2002-05-07 2003-05-05 Tuyau de distribution de carburant pour dispositif d'injection de carburant, en particulier pour des systemes a rail commun Expired - Fee Related EP1502022B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10220339A DE10220339A1 (de) 2002-05-07 2002-05-07 Kraftstoffverteilungsrohr für Kraftfahrzeug-Einspritzeinrichtungen, insbesondere für Common-Rail-Systeme
DE10220339 2002-05-07
PCT/DE2003/001431 WO2003095826A1 (fr) 2002-05-07 2003-05-05 Tuyau de distribution de carburant pour dispositif d'injection de carburant, en particulier pour des systemes a rail commun

Publications (2)

Publication Number Publication Date
EP1502022A1 EP1502022A1 (fr) 2005-02-02
EP1502022B1 true EP1502022B1 (fr) 2006-07-19

Family

ID=29285166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03729864A Expired - Fee Related EP1502022B1 (fr) 2002-05-07 2003-05-05 Tuyau de distribution de carburant pour dispositif d'injection de carburant, en particulier pour des systemes a rail commun

Country Status (5)

Country Link
US (1) US7004145B2 (fr)
EP (1) EP1502022B1 (fr)
JP (1) JP4008920B2 (fr)
DE (2) DE10220339A1 (fr)
WO (1) WO2003095826A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602005002368T2 (de) * 2005-07-08 2008-05-29 C.R.F. Società Consortile per Azioni, Orbassano Anordnung zur Verbindung eines Kraftstoffspeichers für Kraftstoff unter Druck und mindestens einem Injektor, für eine Brennkraftmaschine
DE102008017151B3 (de) * 2008-04-03 2009-08-27 Continental Automotive Gmbh Kraftstoff-Einspritzsystem für eine Brennkraftmaschine
AT509177B1 (de) * 2009-11-23 2013-09-15 Bosch Gmbh Robert Druckrohrstutzen für common-rail-einspritzsystem
JP2012112355A (ja) * 2010-11-26 2012-06-14 Otics Corp デリバリパイプ
US20130001891A1 (en) * 2011-06-29 2013-01-03 Caterpillar Inc. Sealing assembly
JP2014009680A (ja) * 2012-07-03 2014-01-20 Aisan Ind Co Ltd 燃料デリバリパイプ
JP2015025436A (ja) * 2013-07-29 2015-02-05 株式会社デンソー 蓄圧容器
DE102015205980A1 (de) 2015-04-02 2016-10-06 Robert Bosch Gmbh Brennstoffeinspritzanlage und hydraulische Anbindung an einer Brennstoffeinspritzanlage
US9574534B2 (en) * 2015-05-19 2017-02-21 Millennium Industries Corporation Reinforced end cap assembly for pressure vessel
WO2017094401A1 (fr) * 2015-11-30 2017-06-08 日立オートモティブシステムズ株式会社 Injecteur, rampe de carburant et ensemble rampe de carburant
KR102466840B1 (ko) * 2016-04-08 2022-11-15 에이치엘만도 주식회사 밸브 블록
DE102016006411B4 (de) * 2016-05-31 2018-03-29 Henzel Automotive GmbH Anschlussstutzen zum Anschluss einer Kraftstoffleitung an eine Kraftstoffhochdruckpumpe
CN111520266A (zh) * 2020-03-17 2020-08-11 成都威特电喷有限责任公司 一种轻量化的高压油轨

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3598434A (en) * 1970-06-08 1971-08-10 Columbus Autom Parts Co Ball joint having disposable retainer
JPH09317599A (ja) 1996-05-22 1997-12-09 Usui Internatl Ind Co Ltd コモンレールおよびその製造方法
DE19744762A1 (de) * 1997-03-18 1998-10-01 Poppe & Potthoff Gmbh & Co Einspritzeinrichtung für einen Dieselmotor
DE19747736C1 (de) * 1997-10-29 1999-04-08 Siemens Ag Druckspeicher für Kraftstoffversorgungssysteme
DE10143511B4 (de) * 2001-09-05 2006-11-09 Siemens Ag Speichereinspritzsystem mit Drosseleinrichtung
EP1298314B1 (fr) * 2001-09-28 2008-11-26 Continental Automotive GmbH Accumulateur de combustible pour un dispositif d'injection

Also Published As

Publication number Publication date
JP2005530080A (ja) 2005-10-06
EP1502022A1 (fr) 2005-02-02
DE10220339A1 (de) 2003-11-27
JP4008920B2 (ja) 2007-11-14
WO2003095826A1 (fr) 2003-11-20
US20050045152A1 (en) 2005-03-03
DE50304287D1 (de) 2006-08-31
US7004145B2 (en) 2006-02-28

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