EP1423601B1 - Accumulateur de carburant haute pression destine a un systeme d'injection a accumulateur - Google Patents

Accumulateur de carburant haute pression destine a un systeme d'injection a accumulateur Download PDF

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Publication number
EP1423601B1
EP1423601B1 EP02774308A EP02774308A EP1423601B1 EP 1423601 B1 EP1423601 B1 EP 1423601B1 EP 02774308 A EP02774308 A EP 02774308A EP 02774308 A EP02774308 A EP 02774308A EP 1423601 B1 EP1423601 B1 EP 1423601B1
Authority
EP
European Patent Office
Prior art keywords
rib
pressure fuel
fuel reservoir
reservoir according
shaped
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
EP02774308A
Other languages
German (de)
English (en)
Other versions
EP1423601A1 (fr
Inventor
Michael Wirkowski
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
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 EP1423601A1 publication Critical patent/EP1423601A1/fr
Application granted granted Critical
Publication of EP1423601B1 publication Critical patent/EP1423601B1/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
    • F02M55/02—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 present invention relates to a high-pressure fuel accumulator for a storage injection system of internal combustion engines, in particular for common rail systems.
  • a high-pressure pump conveys the fuel to be injected from a tank into a central high-pressure fuel accumulator (rail). From this rail lead individual fuel lines to the respective injectors of the cylinder of the internal combustion engine. The injectors are individually controlled as a function of the operating parameters of the internal combustion engine in order to inject fuel into the respective combustion chamber.
  • FIGS. 3 and 4 show a high-pressure fuel accumulator according to the prior art. As shown in the figures, the high-pressure fuel accumulator comprises a main body 1, which has a longitudinal bore 3, from which a plurality of connection bores 2 for the injectors depart.
  • a high-pressure fuel storage is further known in which an interior of two circular cylindrical recesses are formed, which are arranged in the longitudinal direction parallel to each other and communicate with each other.
  • the connection holes for the injectors are arranged in a provided between the two longitudinal bores connecting portion which is formed saddle-shaped.
  • a high-pressure fuel accumulator is furthermore known in which the main body is plastically deformed inwards in the region of the connecting bore.
  • a rigid inner tube is positioned with a dome-shaped depression in the base body, that the dome-shaped recess is located exactly in the region of a connection bore.
  • the high-pressure fuel accumulator according to the invention for a storage injection system with the features of independent claim 1 is particularly compact and space-saving and has a significantly improved high-pressure resistance at the transition areas between an elongated recess and the connection holes for injectors of the injection system.
  • the high-pressure accumulator according to the invention is constructed such that a provided in a body longitudinal recess is formed substantially cylindrical and has at least one rib-shaped portion on its inner circumference.
  • the connection holes for the injectors open according to the invention at the rib-shaped portion in the longitudinal recess.
  • the inwardly directed formation of the rib-shaped portion in the longitudinal recess while favorable stress conditions are obtained in particular at the end of the rib-shaped portion, so that the stresses can be reduced at the Bohrungsverschneidungen.
  • the inwardly projecting rib-shaped projection thus positions the intersection in the direction of the central axis of the substantially cylindrical longitudinal recess, so that the tangential stresses or circumferential stresses at the intersection are markedly lower.
  • the rib-shaped section is formed on the inner circumference of the longitudinal recess over the entire length of the base body.
  • a plurality of mutually parallel rib-shaped sections are formed on the inner circumference of the base body.
  • Two rib-shaped sections are particularly preferably formed on the inner circumference, which are arranged opposite to each other. As a result, further improved rigidity of the high-pressure fuel accumulator can be achieved.
  • three rib-shaped sections are formed on the inner circumference of the main body.
  • the three rib-shaped sections are arranged offset to each other by 120 °.
  • an acute angle is formed at the transition between the connection bore and the rib-shaped portion.
  • the loads can be kept very low.
  • the rib-shaped sections are preferably rounded.
  • the protruding end the rib-shaped portions are formed semi-circular in section, wherein the connection bore is guided through the most projecting portion of the rib-shaped portion.
  • the high-pressure fuel accumulator consists of a main body 1, which is of elongated design and from which a plurality of connecting bores 2 depart, leading to injectors on individual cylinders of an internal combustion engine to lead.
  • the main body 1 is formed with an inner longitudinal bore 3, which is formed substantially cylindrical.
  • a rib-shaped portion 4 is formed, which extends over the entire length of the main body 1.
  • the radius R of the substantially cylindrical bore is chosen such that the necessary storage volume is provided despite the volume reduction by the inwardly directed rib-shaped portion 4.
  • connection bore 2 is arranged on the base body 1 such that the connection bore 2 is guided through the rib-shaped section 4 and the bore intersection between the longitudinal bore 3 and the connection bore 2 is arranged at the end of the rib-shaped section 4.
  • the rib-shaped section 4 is formed in such a way that its end describes in section a semicircle, so that at the point of intersection, i. Transition region, between the bore 2 and the rib-shaped portion 4 an acute angle ⁇ results.
  • connection bore 2 on the rib-shaped section 4 achieves a favorable stress distribution, since the pressure prevailing in the base body 1 acts on the rib-shaped section 4 from both sides, so that the resulting forces at the bore intersection are markedly reduced. It is also significant that the influence of the tangential stress or hoop stress of the longitudinal bores at the intersection is less. As a result, the risk of cracking at the transition region between the connection bore 2 and the longitudinal bore 3 is significantly reduced.
  • the high pressure accumulator according to the invention in particular for the expected in the near future higher pressures in fuel injection systems can be used or cheaper materials with lower high pressure resistance can be used for the high-pressure fuel storage.
  • the high-pressure fuel accumulator likewise comprises an elongated main body 1, in which a continuous longitudinal recess 3 is formed.
  • three rib-shaped sections 4, 5, 6 are formed on the inner circumference of the longitudinal recess 3 in the second embodiment. As shown in FIG. 2, the three rib-shaped sections 4, 5, 6 are each arranged at 120 ° about the inner circumference of the substantially cylindrical longitudinal recess 3. The rib-shaped sections 4, 5, 6 protrude into the longitudinal recess 3 and are rounded at their end.
  • a first connection bore 2 is arranged such that the bore intersection with the longitudinal recess 3 is arranged on the first rib-shaped section 4.
  • a second connection bore 7 is furthermore guided through the second rib-shaped section 5 (cf., FIG. 2).
  • connection bores for the injectors or other inlets / outlets allows higher degrees of freedom with regard to the arrangement of the connection bores for the injectors or other inlets / outlets. Furthermore, it is possible that the total length of the base body 1 can be reduced in comparison with the prior art, as several holes can be distributed at the same height on the circumference of the body 1.
  • the radius R is chosen such that the necessary storage volume is available.
  • the rib-shaped portion protrudes 4.5 compared to the cylindrically imaginary inner surface of the longitudinal recess by a distance D of more than 2mm inward, whereby a high stability and low residual stresses at high pressure of 1000 to 2500 bar is achieved in the fuel rail, with an inner diameter the inner surface of 7 to 15mm.
  • the second embodiment corresponds to the first embodiment, so that reference can be made to the description given there.
  • the present invention relates to a high-pressure fuel storage for a storage injection system of internal combustion engines having a base body 1, comprising a longitudinal recess 3, from which a plurality of connection bores 2, 7 depart.
  • the inner surface of the longitudinal recess 3 is substantially cylindrical, wherein on the inner circumference of the longitudinal recess 3 at least one rib-shaped portion 4 is formed, in which a connection bore 2 opens into the longitudinal recess 3.

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 (12)

  1. Accumulateur haute pression pour carburant pour un système d'injection à accumulateur de moteur à combustion interne, comportant un corps de base (1) présentant un évidement longitudinal (3) dont la surface intérieure est réalisée essentiellement avec une forme cylindrique et d'où partent plusieurs alésages de raccordement (2),
    caractérisé en ce que, sur la surface intérieure de l'évidement longitudinal, est réalisé au moins un segment en forme de nervure (4), dans lesquels les alésages de raccordement (2) débouchent dans l'évidement longitudinal (3).
  2. Accumulateur haute pression pour carburant suivant la revendication 1, caractérisé en ce que le segment en forme de nervure (4) s'étend sur toute la longueur du corps de base (1).
  3. Accumulateur haute pression pour carburant suivant la revendication 1 ou 2, caractérisé en ce que plusieurs segments en forme de nervure (4, 5, 6) sont réalisés sur le contour intérieur du corps de base (1).
  4. Accumulateur haute pression pour carburant suivant la revendication 3, caractérisé en ce que deux segments en forme de nervure sont réalisés sur le contour intérieur du corps de base (1) et sont disposés en face l'un de l'autre.
  5. Accumulateur haute pression pour carburant suivant la revendication 3, caractérisé en ce que trois segments en forme de nervure (4, 5, 6) sont réalisés sur le contour intérieur du corps de base (1), lesquels sont disposés décalés chacun de 120° les uns par rapport aux autres.
  6. Accumulateur haute pression pour carburant suivant l'une des revendications précédentes, caractérisé en ce qu'un angle aigu (α) est réalisé au point de transition entre l'alésage de raccordement (2) et le segment en forme de nervure (4).
  7. Accumulateur haute pression pour carburant suivant l'une des revendications précédentes, caractérisé en ce que la zone d'extrémité des segments en forme de nervure (4, 5, 6) est réalisée arrondie.
  8. Accumulateur haute pression pour carburant suivant la revendication 7, caractérisé en ce que la zone d'extrémité des segments en forme de nervure (4, 5, 6) est réalisée en coupe en forme de demi-cercle.
  9. Accumulateur haute pression pour carburant suivant l'une des revendications précédentes, caractérisé en ce que l'accumulateur haute pression pour carburant est réalisé à partir d'un tube étiré.
  10. Accumulateur haute pression pour carburant suivant l'une des revendications précédentes, caractérisé en ce que le segment en forme de nervure dépasse, par rapport à la surface intérieure supposée cylindrique, d'une distance (D) de plus de 2 mm vers l'intérieur.
  11. Accumulateur haute pression pour carburant suivant la revendication 3, caractérisé en ce que plusieurs segments en forme de nervure (4, 5, 6) sont réalisés sur le contour intérieur du corps de base (1), lesquels sont disposés avec le même écart angulaire, les uns par rapport aux autres, sur la surface intérieure de l'évidement longitudinal.
  12. Accumulateur haute pression pour carburant suivant l'une des revendications précédentes, caractérisé en ce que l'accumulateur haute pression pour carburant présente au moins deux alésages de raccordement radiaux (2, 7), qui sont implantés à une distance angulaire (WA) de k fois 360° divisé par le nombre n des segments en forme de nervure (4, 5).
EP02774308A 2001-09-05 2002-09-04 Accumulateur de carburant haute pression destine a un systeme d'injection a accumulateur Expired - Lifetime EP1423601B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10143519A DE10143519A1 (de) 2001-09-05 2001-09-05 Kraftstoffhochdruckspeicher für ein Speichereinspritzsystem
DE10143519 2001-09-05
PCT/DE2002/003273 WO2003023220A1 (fr) 2001-09-05 2002-09-04 Accumulateur de carburant haute pression destine a un systeme d'injection a accumulateur

Publications (2)

Publication Number Publication Date
EP1423601A1 EP1423601A1 (fr) 2004-06-02
EP1423601B1 true EP1423601B1 (fr) 2007-03-21

Family

ID=7697810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02774308A Expired - Lifetime EP1423601B1 (fr) 2001-09-05 2002-09-04 Accumulateur de carburant haute pression destine a un systeme d'injection a accumulateur

Country Status (6)

Country Link
US (1) US6923160B2 (fr)
EP (1) EP1423601B1 (fr)
JP (1) JP2005502000A (fr)
DE (2) DE10143519A1 (fr)
HU (1) HUP0401247A2 (fr)
WO (1) WO2003023220A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2299102A1 (fr) 2009-09-07 2011-03-23 OMT Officine Meccaniche Torino S.p.A. Accumulateur de combustible haute pression pour systèmes d'injection à rampe commune

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50302044D1 (de) * 2002-10-23 2006-02-02 Waertsilae Nsd Schweiz Ag Druckspeicher für ein Common Rail System
DE102007018471A1 (de) * 2007-04-19 2008-10-23 Robert Bosch Gmbh Verschneidungsbereich zwischen einer Hochdruckkammer und einem Hochdruckkanal
EP2392816B1 (fr) * 2010-06-03 2013-10-09 Delphi Technologies Holding S.à.r.l. Détente d'un système d'écoulement fluidique pressurisé
JP2014029150A (ja) * 2012-06-29 2014-02-13 Aisan Ind Co Ltd 燃料デリバリパイプおよび燃料デリバリパイプの製造方法
JP6021220B2 (ja) * 2012-11-16 2016-11-09 ボッシュ株式会社 コモンレール
DE102020210124A1 (de) 2020-08-11 2022-02-17 Robert Bosch Gesellschaft mit beschränkter Haftung Metallisches Gehäuseteil, hydraulische Axialkolbenmaschine mit einem metallischen Gehäuseteil und Gusskern für das Gießen eines metallischen Gehäuseteils

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
GB2322819B (en) * 1997-03-03 2000-12-13 Usui Kokusi Sangyo Kaisha Ltd Method for improving fatique strength due to repeated pressure at branch hole part in member for high pressure fluid.
JP2000234688A (ja) * 1999-02-17 2000-08-29 Usui Internatl Ind Co Ltd コモンレールの製造方法
DE19945316A1 (de) 1999-09-22 2001-04-05 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE19945786C1 (de) 1999-09-24 2000-11-16 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE19948338A1 (de) * 1999-10-07 2001-04-12 Bosch Gmbh Robert Verfahren zur Bearbeitung eines Kraftstoffhochdruckspeichers, Kraftstoffhochdruckspeicher und Anschlussstutzen zur Anwendung des Verfahrens
DE19949962A1 (de) * 1999-10-16 2001-04-26 Bosch Gmbh Robert Kraftstoffhochdruckspeicher und Verfahren zur Herstellung eines Kraftstoffhochdruckspeichers
DE10012961A1 (de) * 2000-03-16 2001-09-20 Bosch Gmbh Robert Bauteil, insbesondere Hochdruckteil für Kraftstoff-Einspritzsysteme, und Verfahren zur Herstellung eines solchen Bauteils
DE10056405B4 (de) * 2000-11-14 2005-06-16 Robert Bosch Gmbh Kraftstoffhochdruckspeicher für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen
US6640783B2 (en) * 2001-02-15 2003-11-04 Delphi Technologies, Inc. Composite fuel rail with integral damping and a co-injected non-permeation layer
US6725839B2 (en) * 2002-05-29 2004-04-27 Millennium Industries Corp. Stamped metal fuel rail

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2299102A1 (fr) 2009-09-07 2011-03-23 OMT Officine Meccaniche Torino S.p.A. Accumulateur de combustible haute pression pour systèmes d'injection à rampe commune

Also Published As

Publication number Publication date
DE10143519A1 (de) 2003-03-27
EP1423601A1 (fr) 2004-06-02
HUP0401247A2 (en) 2004-10-28
US20040168675A1 (en) 2004-09-02
US6923160B2 (en) 2005-08-02
JP2005502000A (ja) 2005-01-20
DE50209792D1 (de) 2007-05-03
WO2003023220A1 (fr) 2003-03-20

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