EP1440236A1 - Accumulateur haute pression, en particulier accumulateur haute pression pour carburant - Google Patents

Accumulateur haute pression, en particulier accumulateur haute pression pour carburant

Info

Publication number
EP1440236A1
EP1440236A1 EP02779165A EP02779165A EP1440236A1 EP 1440236 A1 EP1440236 A1 EP 1440236A1 EP 02779165 A EP02779165 A EP 02779165A EP 02779165 A EP02779165 A EP 02779165A EP 1440236 A1 EP1440236 A1 EP 1440236A1
Authority
EP
European Patent Office
Prior art keywords
base body
pressure
notches
pressure accumulator
accumulator
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.)
Withdrawn
Application number
EP02779165A
Other languages
German (de)
English (en)
Inventor
Henning Kreschel
Steffen Jung
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1440236A1 publication Critical patent/EP1440236A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations

Definitions

  • the invention relates to a high-pressure accumulator, in particular a high-pressure fuel accumulator, according to the preamble of the main claim.
  • the invention further relates to a method for producing such a high-pressure accumulator.
  • the high-pressure accumulator has a hollow base body with at least one transverse bore, the connection opening of which creates a fluid connection to the interior of the base body.
  • Such high-pressure accumulators are known, for example, from DE 199 49 962 AI and DE 199 48 338 AI. It is a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine. In such injection systems, a high-pressure pump conveys the fuel to be injected from a tank into the central high-pressure fuel reservoir (common rail). From there, fuel lines lead to the individual injectors, which are assigned to the cylinders of the internal combustion engine.
  • the high-pressure fuel accumulators are designed for pressures above 1,000 bar.
  • Such high-pressure accumulators usually consist of a hollow base body which has connecting pieces in which a transverse bore leads into the interior of the hollow body.
  • DE 199 48 338 proposes deforming the base body of the high pressure accumulator in the area of the connection openings. For example. can by elastic deformations of the base body from the outside in the critical area of
  • the present invention is therefore intended to provide a high-pressure accumulator and a method for its production which avoid the disadvantages mentioned above.
  • the simple manufacture of a high-pressure-stable high-pressure store should be possible, the high-pressure properties of which remain unchanged over time.
  • the high-pressure accumulator characterized in accordance with the features of the main claim has a hollow base body, on the outer and / or inner surface of which one or more notches and / or cutouts are provided for relieving tension of the high-pressure accumulator under pressure are.
  • the deformation behavior of the base body of the high-pressure accumulator can be changed in such a way that the tensile stress state occurring at the most highly stressed point is counteracted by compressive stress, the two stress states overlapping with the result that the maximum stress is reduced.
  • a notch differs from a recess in that the width of a notch is less than its depth, while the width of a recess is at least equal to its depth.
  • relief notch can be understood in the following to mean both a notch and a recess.
  • High-pressure accumulator are attached.
  • the relief notches can then contribute to reducing the maximum stress directly at the critical points.
  • the most highly loaded tension points are 'generally the areas of connection ports, so the bore intersection of the inner bore of the hollow body and the transverse bore.
  • Especially high-pressure fuel accumulator are generally prepared from a base body having a cylindrical cross-section, said transverse bores, possibly mounted eccentrically, offset in the axial direction are arranged along the ⁇ tubular body.
  • such a high-pressure accumulator includes at least parts of the exterior and / or Notches are made on the inner circumference of the base body. These notches are preferably located in the vicinity of the transverse bores at the most stressed points. It is also possible to arrange a notch directly in the area of the transverse bore, thereby widening it. From a manufacturing point of view as well as in terms of effectiveness, it makes sense for the notches to extend over the entire circumference of the base body.
  • the high-pressure accumulator according to the invention described can be produced in such a way that relief notches of a certain cross-sectional shape are targeted over parts of the circumference or over the entire circumference of the base body be introduced. In the case of a forged version, this can already take place during the production of the blank. Notch shapes can also be introduced (additionally) by turning or milling operations.
  • FIG. 1 shows a high-pressure fuel accumulator according to the invention in longitudinal section with notches along the circumference of the cylindrical base body
  • Figure 2 shows an inventive
  • High-pressure fuel accumulator with a basic body of cylindrical shape with a plurality of transverse bores and notches in the outer circumference of the
  • Figure 3 shows a further embodiment of a high-pressure fuel accumulator according to the invention with a base body cylindrical shape, in the
  • a recess is made on the outer circumference
  • Figure 4 shows a detail of a further high-pressure fuel accumulator according to the invention in longitudinal section with inner notches
  • FIG. 5 shows a high-pressure fuel reservoir according to the invention of cylindrical shape, in the inner geometry of which a recess is made;
  • FIG. 6 shows a further embodiment of a high-pressure fuel accumulator with notches according to the invention in the inner and outer surface of the base body;
  • FIG. 7 shows the detail of an embodiment of the invention in which an inner notch is made directly along the inner surface of the base body on the transverse bore (FIG. 7A), and a cross section of this representation (FIG. 7B) and
  • Figure 8 shows an embodiment of the high pressure accumulator
  • FIG. 1 shows the basic structure of a high-pressure accumulator according to the invention, as used for a common rail
  • the high-pressure accumulator consists of a hollow base body 1, which has a cylindrical shape.
  • a transverse bore 2 leads through the connection opening 3 into the interior 4 of the base body 1.
  • Fuel can be injected from a tank under high pressure into the
  • a notch 5 is made over the entire circumference of the outer surface of the base body 1. This relief notch 5 changes that
  • the relief notches according to the invention can generally be characterized mathematically by their distance a from the nearest transverse bore 2 (highly stressed point), their width b, their depth h and a possible notch radius R, the dimensions of a cylindrical base body, in addition to its length, essentially being the inner diameter d and outer diameter D are fixed. It turns out that the mentioned parameters of the notches can be varied in certain areas without canceling the effect of the stress reduction according to the invention.
  • the width b of the notch should be somewhat larger than the diameter of the transverse bore 2 and the depth h should be between 25 and 75% of the wall thickness of the base body 1.
  • cylindrical shape of the hollow base body is not essential for the high-pressure accumulator according to the invention.
  • Figure 2 shows a cylindrical
  • High-pressure fuel accumulator with a plurality of connection pieces 7 with transverse bores 2, which establish a fluid connection to the interior 4 of the base body 1 via connection openings 3.
  • notches 5 are provided in the vicinity of the highly stressed points (transverse bore 2) along the outer circumference of the base body 1 and are located symmetrically to the left and right of each transverse bore 2 at the same distance a.
  • the distance between two adjacent notches 5 is designated B, where B should be larger than the distance a in order to achieve a good voltage reduction.
  • FIG. 4 shows two inner notches 5 which extend symmetrically to the transverse bore 2 over the entire circumference of the inner surface of the base body 1.
  • the pressure-induced expansion of the inner notches 5 leads in this example to a compressive stress on the transverse bore 2 in the region of the connection opening 3, so that the occurring there 'tensile stresses are superimposed by compressive stresses, thus a total of the stress state positively influenced and a crack is counteracted.
  • FIG. 5 shows a similar arrangement of a high-pressure accumulator according to the invention to FIG. 3, but here recesses 6 are provided on the inner surface of the hollow base body 1.
  • the one in the area of the cutouts reduced wall thickness of the storage tank should be selected so that the maximum stress lies in the area of the intersection of the holes.
  • FIG. 6 shows a high-pressure accumulator according to the invention, the base body 1 of which has a combination of inner and outer notches 5.
  • the inner notches are distributed symmetrically over the entire inner cross section of the base body 1 with respect to the transverse bore 2, while further outside, likewise symmetrically arranged outer notches 5, are added.
  • the symmetry of this arrangement leads to an optimal voltage reduction.
  • FIG. 7B shows the cross section along the line AA, the area in the notch 5 being different
  • Inner diameter d of the cylindrical base body 1 is increased by the amount 2h.
  • FIG. 8B shows the cross section along the line AA from FIG. 8A.
  • the inner notch 5 increases the maximum achievable eccentric attachment of the transverse bore 2.

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

L'invention concerne un accumulateur haute pression, en particulier un accumulateur haute pression pour carburant, comprenant un corps de base creux (1) et au moins un alésage transversal (2) ayant une ouverture de raccordement (3) vers la chambre intérieure (4) du corps de base (1). En vue d'accroître la résistance à la pression, l'invention est caractérisée en ce qu'une ou plusieurs rainures (5) et/ou un ou plusieurs évidements (6) destinés à la détente des contraintes s'exerçant sur l'accumulateur soumis à la pression sont ménagés sur la surface intérieure et/ou extérieure du corps de base creux (1), et en ce que ces rainures (5) et évidements (6) sont ménagés de préférence à proximité des alésages transversaux (2), ou s'étendent en direction axiale, à proximité immédiate desdits alésages transversaux (2).
EP02779165A 2001-10-20 2002-10-18 Accumulateur haute pression, en particulier accumulateur haute pression pour carburant Withdrawn EP1440236A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10152261A DE10152261A1 (de) 2001-10-20 2001-10-20 Hochdruckspeicher wie Kraftstoffhochdruckspeicher
DE10152261 2001-10-20
PCT/DE2002/003940 WO2003036075A1 (fr) 2001-10-20 2002-10-18 Accumulateur haute pression, en particulier accumulateur haute pression pour carburant

Publications (1)

Publication Number Publication Date
EP1440236A1 true EP1440236A1 (fr) 2004-07-28

Family

ID=7703428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02779165A Withdrawn EP1440236A1 (fr) 2001-10-20 2002-10-18 Accumulateur haute pression, en particulier accumulateur haute pression pour carburant

Country Status (3)

Country Link
EP (1) EP1440236A1 (fr)
DE (1) DE10152261A1 (fr)
WO (1) WO2003036075A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0312406D0 (en) * 2003-05-29 2003-07-02 Delphi Tech Inc Injector assembly
DE10329052A1 (de) 2003-06-27 2005-01-13 Robert Bosch Gmbh Verbindung für Hochdruckräume von Kraftstoffinjektoren
DE102006005428A1 (de) * 2006-02-07 2006-12-07 Winkelmann Powertrain Components Gmbh & Co. Kg Verfahren zur Herstellung eines Kraftstoffhochdruckspeichers
DE102006036103A1 (de) * 2006-08-02 2008-02-07 Siemens Ag Kanalanordnung
JP2008095629A (ja) * 2006-10-13 2008-04-24 Bosch Corp コモンレール
FI120844B (fi) * 2007-05-31 2010-03-31 Waertsilae Finland Oy Polttoaineen syöttöjärjestelmän polttoainevarasto
DE102007034720A1 (de) * 2007-07-23 2009-01-29 Robert Bosch Gmbh Kraftstoffhochdruckspeicher
DE102008013575B3 (de) 2008-03-11 2009-08-13 Poppe & Potthoff Gmbh Kraftstoffverteilerbaugruppe
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
DE102011075054A1 (de) * 2011-05-02 2012-11-08 Robert Bosch Gmbh Brennstoffverteiler
DE202013103710U1 (de) * 2013-08-15 2013-08-29 Ti Automotive (Heidelberg) Gmbh Kraftstoffverteilerleiste
DE102014212194A1 (de) * 2014-06-25 2015-12-31 Robert Bosch Gmbh Verfahren zur Reduzierung der Spannung an einer Verschneidung zweier ineinander einmündenden Kanäle
DE102018212282A1 (de) * 2018-07-24 2020-01-30 Continental Automotive Gmbh Fluidverteiler, insbesondere Kraftstoffverteiler für ein Kraftstoffeinspritzsystem eines Fahrzeuges, sowie Verfahren zur Herstellung eines Fluidverteilers
EP3604787B1 (fr) * 2018-08-03 2021-10-06 Vitesco Technologies GmbH Rampe de carburant destinée à un système d'injection de carburant et procédé de fabrication d'une telle rampe de carburant

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3841369B2 (ja) * 1996-11-30 2006-11-01 臼井国際産業株式会社 コモンレール
DE19945316A1 (de) * 1999-09-22 2001-04-05 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE19948341A1 (de) * 1999-10-07 2001-04-19 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE19948339C1 (de) * 1999-10-07 2000-12-14 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
DE19949963A1 (de) * 1999-10-16 2001-04-26 Bosch Gmbh Robert Verfahren zum Herstellen eines Kraftstoffhochdruckspeichers
DE19949962A1 (de) 1999-10-16 2001-04-26 Bosch Gmbh Robert Kraftstoffhochdruckspeicher und Verfahren zur Herstellung eines Kraftstoffhochdruckspeichers
DE19953577A1 (de) * 1999-11-08 2001-05-23 Bosch Gmbh Robert Kraftstoffhochdruckspeicher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03036075A1 *

Also Published As

Publication number Publication date
WO2003036075A1 (fr) 2003-05-01
DE10152261A1 (de) 2003-04-30

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