EP1144854B1 - Reservoir de carburant haute pression - Google Patents

Reservoir de carburant haute pression Download PDF

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Publication number
EP1144854B1
EP1144854B1 EP00979440A EP00979440A EP1144854B1 EP 1144854 B1 EP1144854 B1 EP 1144854B1 EP 00979440 A EP00979440 A EP 00979440A EP 00979440 A EP00979440 A EP 00979440A EP 1144854 B1 EP1144854 B1 EP 1144854B1
Authority
EP
European Patent Office
Prior art keywords
tubular body
basic
weakening
connection apertures
cross
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
EP00979440A
Other languages
German (de)
English (en)
Other versions
EP1144854A1 (fr
Inventor
Helmut Knoedl
Stefan Haug
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 EP1144854A1 publication Critical patent/EP1144854A1/fr
Application granted granted Critical
Publication of EP1144854B1 publication Critical patent/EP1144854B1/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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • 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 high-pressure fuel storage for a Common rail fuel injection system of an internal combustion engine, with a tubular base body, which is a substantially circular cylindrical, relative to the longitudinal axis of the tubular Base body, centrally arranged interior having, with several connection openings communicates, wherein the cross section the tubular body in the section areas in which the Connection openings are arranged, weakened.
  • a high-pressure pump delivers possibly with the aid of a prefeed pump, the Fuel to be injected from a tank in the central High-pressure fuel storage, which is referred to as common rail. From lead the rail fuel lines to the individual injectors, the associated with the cylinders of the internal combustion engine.
  • the injectors depending on the operating parameters of the Internal combustion engine individually controlled by the engine electronics to To inject fuel into the combustion chamber of the internal combustion engine. Due to the high-pressure fuel storage are the pressure generation and the Injection decoupled from each other.
  • a conventional high pressure fuel storage is e.g. in DE 195 48 610 A described.
  • the known High-pressure fuel storage can withstand pressures of up to about 1100 bar.
  • EPC is a common rail known in which the interior the common rail in the region of the connection openings formed flat is.
  • the object of the invention is the high pressure resistance of the known Fuel high pressure accumulator with simple measures to increase.
  • the object is in a high-pressure fuel storage for a common rail fuel injection system an internal combustion engine after the Preamble of claim 1 solved by the Cross - sectional weakening under pressure loading an ovalization of the Basic body is achieved.
  • the present invention has It turned out that in the field of intersections between the Connection openings and the tubular body under internal pressure critical tensile stresses occur. Through the targeted weakening of the tubular body is the high pressure resistance of the increased fuel high pressure accumulator according to the invention.
  • connection openings are substantially tangential open into the interior of the body, and that in the area of Connection openings each a weakening of the tubular Basic body is provided.
  • High-pressure fuel accumulator expands the interior of the tubular Base body under the prevailing high pressure.
  • By the targeted weakening of the tubular body deforms in the unloaded state circular cross section of the interior to one Ellipse, which is also referred to as ovalization of the diameter. This is a main peak the ellipse in the area of the respective connection opening arranged.
  • This will be in the area of the intersection between the tubular body and the Connection opening a compressive stress in the circumferential direction of the induced tubular body. This compressive stress compensates part of the critical tension. Thereby is the stress in the high - risk areas of the Reduced intersections.
  • Another particular embodiment of the invention is characterized in that, viewed in cross section, in each case one more opposite the connection openings Weakening of the tubular body is provided. This will cause the previously described effect of ovalization the interior of the tubular body still strengthened. This leads to a further increase in the High pressure resistance of the invention Fuel high-pressure accumulator.
  • connection openings in Essentially radially in the interior of the body open, and that, viewed in cross-section, opposite the Connection openings each a weakening of the tubular Basic body is provided. This will be the advance described effect of the ovalization of the interior of the tubular body even at a radial arranged connection opening achieved.
  • Another particular embodiment of the invention is characterized in that the weakening of the tubular body of a bevel, a Undercut or a key surface is formed.
  • These Types of cross-sectional weakening have the advantage that they can be easily made. This can also be done in conventional high-pressure fuel storage under Internal pressure occurring high voltages in the intersection area be reduced.
  • the illustrated in Figure 1 first embodiment of a High-pressure fuel storage according to the invention comprises a tubular body 1.
  • the tubular body 1 has the Shape of a hollow circular cylinder.
  • Inside the tubular Base 1 is a longitudinal bore 2 recessed.
  • the longitudinal bore 2 is concentrically arranged in the tubular body 1 and forms the storage volume of the invention Fuel high-pressure accumulator.
  • connection bore 3 extends transversely to the longitudinal axis of the tubular Base body and opens tangentially into the longitudinal bore 2.
  • the Bore intersection between the connection hole 3 and the Longitudinal bore 2 is indicated at 4.
  • connection bore 3 In the area of the connection bore 3 is in the outer Lateral surface of the tubular base body 1 a Recess 5 provided.
  • the recess 5 is in Cross-section circular arc-shaped and extends in the longitudinal direction of the tubular base body 1 only in the Area of the connection bore 3. Opposite the recess 5 is indicated at 6 a flattening.
  • a high-pressure fuel storage according to the invention comprises a tubular base body 11.
  • a longitudinal bore 12th spared In the tubular body 11 is a longitudinal bore 12th spared.
  • a connection bore 13 opens radially into the Longitudinal bore 12. The bore intersection between the Connecting bore 13 and the longitudinal bore 12 is at 14 indicated.
  • the invention can not only High-pressure fuel storage, but also on injectors and pump-nozzle body can be arranged.
  • the weakenings 5, 6; 16 of the tubular body are according to the present invention on the outer Formed lateral surface of the tubular body.

Claims (5)

  1. Accumulateur de carburant à haute pression pour un système d'injection de carburant à rampe commune dans un moteur à combustion interne, comportant un corps de base (1; 11) tubulaire dont l'espace intérieur (2; 12) presque cylindrique circulaire et concentrique à l'axe longitudinal du corps de base tubulaire, est en liaison avec plusieurs ouvertures de raccordement (3 ; 13), la section transversale du corps de base (1 ; 11) tubulaire étant amincie dans les zones partielles dans lesquelles sont placées les ouvertures de raccordement (3, 13),
    caractérisé en ce que
    le corps de base (1 ; 11) devient ovale sous l'effet de la pression du fait que la section transversale est amincie.
  2. Accumulateur de carburant à haute pression selon la revendication 1,
    caractérisé en ce que
    les ouvertures de raccordement (3) débouchent presque tangentiellement dans l'espace intérieur du corps de base (1), et
    un amincissement (5) du corps de base (1) tubulaire est à chaque fois prévu dans la zone des ouvertures de raccordement (3).
  3. Accumulateur de carburant à haute pression selon la revendication 2,
    caractérisé en ce que
    vu en section transversale, un autre amincissement (6) du corps de base (1) tubulaire est à chaque fois prévu en face des ouvertures de raccordement (3).
  4. Accumulateur de carburant à haute pression selon la revendication 1,
    caractérisé en ce que
    les ouvertures de raccordement (13) débouchent presque tangentiellement dans l'espace intérieur du corps de base (11), et
    vu en section transversale, un amincissement (16) du corps de base (1) tubulaire est à chaque fois prévu en face des ouvertures de raccordement (13).
  5. Accumulateur de carburant à haute pression selon l'une des revendications précédentes,
    caractérisé en ce que
    l'amincissement (5, 6 ; 16) du corps de base (1 ;11) tubulaire est formé par une coupe polie, une rainure de dégagement ou par un méplat de clé.
EP00979440A 1999-11-08 2000-10-20 Reservoir de carburant haute pression Expired - Lifetime EP1144854B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19953577A DE19953577A1 (de) 1999-11-08 1999-11-08 Kraftstoffhochdruckspeicher
DE19953577 1999-11-08
PCT/DE2000/003695 WO2001034969A1 (fr) 1999-11-08 2000-10-20 Reservoir de carburant haute pression

Publications (2)

Publication Number Publication Date
EP1144854A1 EP1144854A1 (fr) 2001-10-17
EP1144854B1 true EP1144854B1 (fr) 2005-08-17

Family

ID=7928227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00979440A Expired - Lifetime EP1144854B1 (fr) 1999-11-08 2000-10-20 Reservoir de carburant haute pression

Country Status (11)

Country Link
US (1) US6427665B1 (fr)
EP (1) EP1144854B1 (fr)
JP (1) JP4593860B2 (fr)
KR (1) KR100703922B1 (fr)
CN (1) CN1165681C (fr)
BR (1) BR0007406B1 (fr)
CZ (1) CZ295456B6 (fr)
DE (2) DE19953577A1 (fr)
ES (1) ES2248151T3 (fr)
TW (1) TW470812B (fr)
WO (1) WO2001034969A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19948339C1 (de) * 1999-10-07 2000-12-14 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE10056405B4 (de) * 2000-11-14 2005-06-16 Robert Bosch Gmbh Kraftstoffhochdruckspeicher für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE10152261A1 (de) * 2001-10-20 2003-04-30 Bosch Gmbh Robert Hochdruckspeicher wie Kraftstoffhochdruckspeicher
DE10247323A1 (de) * 2002-10-10 2004-04-22 Robert Bosch Gmbh Innendruckbelastetes Bauteil, insbesondere für die Kraftstoffeinspritzung für Brennkraftmaschinen mit einem variablem Innendurchmesser
DE10261737A1 (de) * 2002-12-30 2004-07-08 Robert Bosch Gmbh Innendruckbelastetes Bauteil, insbesondere für die Kraftstoffeinspritzung für Brennkraftmaschinen mit einer Kraftstoffhochdruckpumpe
JP2005140058A (ja) * 2003-11-07 2005-06-02 Denso Corp コモンレール
US8141910B2 (en) * 2004-11-01 2012-03-27 Weise Gary K Plumbing apparatus
US7028668B1 (en) * 2004-12-21 2006-04-18 Robert Bosch Gmbh Self-damping fuel rail
EP2320084B1 (fr) 2009-11-06 2012-09-12 Delphi Technologies Holding S.à.r.l. Boîtier avec passages entrecroisés pour applications de fluide à haute pression

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548610A1 (de) * 1995-12-23 1997-06-26 Bosch Gmbh Robert Kraftstoffeinspritzeinirchtung für Brennkraftmaschinen

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0649897Y2 (ja) * 1988-01-08 1994-12-14 ダイハツ工業株式会社 内燃機関における燃料デリバリ管の構造
JPH02286867A (ja) * 1989-04-28 1990-11-27 Suzuki Motor Corp 内燃機関の燃料供給装置
JP2898384B2 (ja) * 1989-09-27 1999-05-31 臼井国際産業株式会社 高圧燃料レールにおける分岐接続体の接続構造
JP3778385B2 (ja) * 1996-10-03 2006-05-24 臼井国際産業株式会社 コモンレール
US5979945A (en) * 1996-12-07 1999-11-09 Usuikokusai Sangyo Kaisha Ltd. Common rail
JPH10220320A (ja) * 1996-12-07 1998-08-18 Usui Internatl Ind Co Ltd コモンレール
JPH10318084A (ja) * 1997-03-03 1998-12-02 Usui Internatl Ind Co Ltd 分岐孔を有する摺動体内蔵型高圧流体用部材
JP3846763B2 (ja) * 1997-03-03 2006-11-15 臼井国際産業株式会社 コモンレールの製造方法
US6126208A (en) * 1997-03-03 2000-10-03 Usui Kokusai Sangyo Kaisha Limited Common rail and method of manufacturing the same
JP3916178B2 (ja) * 1997-03-04 2007-05-16 臼井国際産業株式会社 コモンレール
DE19728111A1 (de) * 1997-07-02 1999-01-07 Bosch Gmbh Robert Kraftstoffeinspritzsystem

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548610A1 (de) * 1995-12-23 1997-06-26 Bosch Gmbh Robert Kraftstoffeinspritzeinirchtung für Brennkraftmaschinen

Also Published As

Publication number Publication date
DE19953577A1 (de) 2001-05-23
DE50010971D1 (de) 2005-09-22
US6427665B1 (en) 2002-08-06
TW470812B (en) 2002-01-01
KR100703922B1 (ko) 2007-04-05
CZ295456B6 (cs) 2005-08-17
JP4593860B2 (ja) 2010-12-08
CN1335913A (zh) 2002-02-13
EP1144854A1 (fr) 2001-10-17
JP2003514191A (ja) 2003-04-15
CN1165681C (zh) 2004-09-08
KR20010093227A (ko) 2001-10-27
BR0007406B1 (pt) 2008-11-18
BR0007406A (pt) 2001-10-30
WO2001034969A1 (fr) 2001-05-17
ES2248151T3 (es) 2006-03-16
CZ20012470A3 (cs) 2002-11-13

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