EP1423601A1 - 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

Info

Publication number
EP1423601A1
EP1423601A1 EP02774308A EP02774308A EP1423601A1 EP 1423601 A1 EP1423601 A1 EP 1423601A1 EP 02774308 A EP02774308 A EP 02774308A EP 02774308 A EP02774308 A EP 02774308A EP 1423601 A1 EP1423601 A1 EP 1423601A1
Authority
EP
European Patent Office
Prior art keywords
pressure fuel
rib
fuel accumulator
base body
accumulator according
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.)
Granted
Application number
EP02774308A
Other languages
German (de)
English (en)
Other versions
EP1423601B1 (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
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 EP1423601A1 publication Critical patent/EP1423601A1/fr
Application granted granted Critical
Publication of EP1423601B1 publication Critical patent/EP1423601B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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 memory injection system of internal combustion engines, in particular for Co mon-rail systems.
  • a high-pressure pump conveys the fuel to be injected from a tank to a central high-pressure fuel reservoir (rail). Individual fuel lines lead from this rail to the respective injectors of the cylinders of the internal combustion engine. The injectors are controlled individually depending on the operating parameters of the internal combustion engine in order to inject fuel into the respective combustion chamber.
  • 3 and 4 show a high-pressure fuel accumulator according to the prior art.
  • the high-pressure fuel accumulator comprises a base body 1, which has a longitudinal bore 3, from which a plurality of connection bores 2 for the injectors extend. Since the accumulator injection systems work at very high pressures, strength problems occur in particular at the transition areas marked with arrows in FIG. 3 between the longitudinal bore 3 and the connection bores 2, which problems arise there
  • a high-pressure fuel accumulator is also known, in which an interior is formed from two circular-cylindrical recesses which are arranged parallel to one another in the longitudinal direction and are connected to one another.
  • the connection bores for the injectors are arranged in a connection area which is provided between the two longitudinal bores and is in the form of a saddle.
  • this high-pressure fuel accumulator has a relatively large width. Furthermore, the production of the two parallel holes, for example by means of deep hole drilling, is very complex.
  • the high-pressure fuel accumulator according to the invention for an accumulator injection system with the features of claim 1 has a particularly compact and space-saving design and has a significantly improved high pressure resistance at the transition areas between an elongated recess and the connection bores for injectors of the injection system.
  • the high-pressure accumulator according to the invention is constructed in such a way that a longitudinal recess is substantially cylindrical and has at least one rib-shaped section on its inner circumference. According to the invention, the connection bores for the injectors open into the longitudinal recess at the rib-shaped section.
  • the inward design of the rib-shaped section in the longitudinal recess Due to the inward design of the rib-shaped section in the longitudinal recess, favorable stress conditions are obtained, in particular at the end of the rib-shaped section, so that the stresses at the intersections of the bores can be reduced.
  • the inwardly projecting rib-shaped projection thus positions the intersection in the direction of the central axis of the essentially cylindrical longitudinal recess, so that the tangential stresses or circumferential stresses on the intersection are significantly lower.
  • the pressure pulse strength can also be further increased by the configuration of the high-pressure accumulator according to the invention.
  • the rib-shaped section is particularly preferably formed on the inner circumference of the longitudinal recess over the entire length of the base body.
  • a plurality of rib-shaped sections running parallel to one another are formed on the inner circumference of the base body. This makes it possible for the connecting lines for the injectors or inlets / outlets to be located at different points on the Circumference of the elongated body can be arranged.
  • two rib-shaped sections are formed on the inner circumference, which are arranged opposite to each other. As a result, an improved rigidity of the high-pressure fuel accumulator can be achieved.
  • three rib-shaped sections are formed on the inner circumference of the base body.
  • the three rib-shaped sections are each offset by 120 ° from one another.
  • a plurality of connection bores in one sectional plane i.e. can be arranged at a height in the longitudinal direction of the base body.
  • An acute angle is preferably formed at the transition between the connection bore and the rib-shaped section. As a result, the loads can be kept very low.
  • the rib-shaped sections are preferably rounded.
  • the protruding end is particularly preferred of the rib-shaped sections in the form of a semi-circle in section, the connection bore being guided through the most protruding region of the rib-shaped section.
  • FIG. 1 shows a schematic sectional view of a high-pressure fuel accumulator according to a first exemplary embodiment of the present invention
  • FIG. 2 shows a schematic sectional view of a high-pressure fuel accumulator according to a second exemplary embodiment of the present invention
  • Figure 3 is a schematic longitudinal sectional view of a high-pressure fuel accumulator according to the prior art
  • Figure 4 is a sectional view taken along line A-A of the
  • a first exemplary embodiment according to the present invention is described below with reference to FIG. 1.
  • the high-pressure fuel accumulator consists of a base body 1, which is elongated and from which a plurality of connection bores 2 extend, which form injectors on individual cylinders of an internal combustion engine. machine.
  • the base body 1 is formed with an inner longitudinal bore 3, which is essentially cylindrical.
  • a rib-shaped section 4 is formed on the inner circumference of the longitudinal bore 3 and extends over the entire length of the base body 1.
  • the radius R of the essentially cylindrical bore is selected such that the necessary storage volume is provided by the inwardly directed rib-shaped section 4 despite the volume reduction.
  • connection bore 2 is arranged on the base body 1 in such a way that the connection bore 2 is guided through the rib-shaped section 4 and the intersection of the holes 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 such that its end describes a semicircle in section, so that at the intersection, i.e. Transition area between the bore 2 and the rib-shaped section 4 results in an acute angle ⁇ .
  • connection bore 2 on the rib-shaped section 4 results in 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 intersection of the holes are significantly reduced. It is also important that the influence of the tangential tension or circumferential tension of the longitudinal bores on the intersection is less. This significantly reduces the risk of cracks forming at the transition area between the connection bore 2 and the longitudinal bore 3.
  • the high-pressure accumulator according to the invention can thus be used in particular for the higher pressures to be expected in the near future in the injection systems are used or more cost-effective materials with lower high pressure resistance can be used for the high-pressure fuel storage.
  • a high-pressure fuel accumulator according to a second exemplary embodiment of the present invention is described below with reference to FIG.
  • the same or functionally the same parts are designated with the same reference numerals as in the first embodiment.
  • the high-pressure fuel accumulator likewise comprises an elongate base 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 exemplary embodiment. As shown in FIG. 2, the three rib-shaped sections 4, 5, 6 are arranged at 120 ° each around the inner circumference of the essentially 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 intersection of the bores with the longitudinal recess 3 is arranged on the first rib-shaped section 4.
  • a second connection bore 7 is also passed through the second rib-shaped section 5 (cf. FIG. 2).
  • the arrangement of a plurality of rib-shaped sections 4, 5, 6 thus makes it possible for the connection bores in the longitudinal direction of the base body 1 to be at the same height at different positions on the circumference of the Base body 1 can be arranged.
  • .0 can be decorated, since several holes can be distributed at the same height on the circumference of the base body 1.
  • the radius R is chosen such that the necessary storage volume is available.
  • the rib-shaped section 4, 5 protrudes inwards in comparison to the cylindrical inner surface of the longitudinal recess by a distance D of more than 2 mm, as a result of which high stability and low internal stresses at high pressure of 1000 to 2500 bar are achieved in the fuel distributor, with an inner diameter the inner surface from 7 to 15mm.
  • the second exemplary embodiment corresponds to the first exemplary embodiment, so that reference can be made to the description given there.
  • the present invention thus relates to a high-pressure fuel accumulator for an accumulator injection system of internal combustion engines with a base body 1, comprising a longitudinal recess 3, from which a plurality of connection bores 2, 7 extend.
  • the inner surface of the longitudinal recess 3 is essentially cylindrical, at least one rib-shaped section 4 being formed on the inner circumference of the longitudinal recess 3, 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)

Abstract

La présente invention concerne un accumulateur de carburant haute pression destiné à un système d'injection à accumulateur de moteurs à combustion interne. Ledit accumulateur comporte un corps de base (1) présentant une cavité longitudinale (3) à partir de laquelle s'étendent plusieurs alésages de raccordement (2, 7). La surface intérieure de la cavité longitudinale (3) est essentiellement cylindrique, et la périphérie intérieure de la cavité longitudinale (3) comporte au moins une section (4) en forme de nervure par laquelle un alésage de raccordement aboutit dans la cavité longitudinale (3).
EP02774308A 2001-09-05 2002-09-04 Accumulateur de carburant haute pression destine a un systeme d'injection a accumulateur Expired - Fee Related EP1423601B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10143519 2001-09-05
DE10143519A DE10143519A1 (de) 2001-09-05 2001-09-05 Kraftstoffhochdruckspeicher für ein Speichereinspritzsystem
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 true EP1423601A1 (fr) 2004-06-02
EP1423601B1 EP1423601B1 (fr) 2007-03-21

Family

ID=7697810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02774308A Expired - Fee Related 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)

Families Citing this family (7)

* 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
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
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2230745A1 (fr) * 1997-03-03 1998-09-03 Kikuo Asada Methode permettant d'ameliorer la resistance a la fatigue par suite d'une pression repetee a la partie d'un trou de branchement dans une piece pour fluide haute pression, partie de trou de branchement de la piece pour fluide haute pression formee a l'aide de cette methode et piece pour fluide haute pression possedant une glissiere integree recevant le trou d
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
See references of WO03023220A1 *

Also Published As

Publication number Publication date
US6923160B2 (en) 2005-08-02
JP2005502000A (ja) 2005-01-20
DE50209792D1 (de) 2007-05-03
US20040168675A1 (en) 2004-09-02
WO2003023220A1 (fr) 2003-03-20
HUP0401247A2 (en) 2004-10-28
EP1423601B1 (fr) 2007-03-21
DE10143519A1 (de) 2003-03-27

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