EP1137878B1 - Accumulateur de carburant haute pression - Google Patents

Accumulateur de carburant haute pression Download PDF

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Publication number
EP1137878B1
EP1137878B1 EP00967579A EP00967579A EP1137878B1 EP 1137878 B1 EP1137878 B1 EP 1137878B1 EP 00967579 A EP00967579 A EP 00967579A EP 00967579 A EP00967579 A EP 00967579A EP 1137878 B1 EP1137878 B1 EP 1137878B1
Authority
EP
European Patent Office
Prior art keywords
pressure fuel
circular cylindrical
essentially circular
cylindrical recesses
longitudinal
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
EP00967579A
Other languages
German (de)
English (en)
Other versions
EP1137878A1 (fr
Inventor
Friedrich Boecking
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 EP1137878A1 publication Critical patent/EP1137878A1/fr
Application granted granted Critical
Publication of EP1137878B1 publication Critical patent/EP1137878B1/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 invention relates to a high-pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine, having a tubular base body whose interior communicates with a plurality of terminals.
  • a high-pressure pump conveys the fuel to be injected from a tank into the central high-pressure fuel accumulator, which is referred to as a common rail.
  • the rail lead fuel lines to the individual injectors, which are assigned to the cylinders of the internal combustion engine.
  • the injectors are controlled individually by the engine electronics as a function of the operating parameters of the internal combustion engine in order to inject fuel into the combustion chamber of the internal combustion engine. Due to the high-pressure fuel storage, the pressure generation and the injection are decoupled from each other.
  • a conventional high-pressure fuel storage is described for example in German Utility Model DE 295 21 402 U1.
  • the known high-pressure fuel storage can withstand pressures of up to about 1100 bar.
  • the object of the invention is to increase the high pressure resistance of the known high-pressure fuel storage with simple measures.
  • the high-pressure fuel storage according to the invention should be inexpensive to produce.
  • a high-pressure fuel accumulator for a common-rail fuel injection system of an internal combustion engine having a tubular body whose interior communicates with a plurality of terminals, characterized in that the interior of at least two substantially circular cylindrical recesses is formed, which communicate with each other stand and their longitudinal axes are arranged parallel to each other, and in that the terminals only emanate from the lateral surface of one of the substantially circular cylindrical recesses.
  • the high-pressure resistance of the high-pressure fuel accumulator is limited primarily by the intersections between the connection openings and the main body interior. On the transitions between the connection openings and the main body act during operation large forces.
  • the functions of storing and distributing the main body interior are distributed to the two recesses. This makes it possible to optimally design with respect to the high-pressure resistance transitions between the body interior and the connection openings optimal. Independently of the connections in the area of the lateral surface of the circular-cylindrical recesses, it is additionally possible for connections to be provided on the end faces of the circular-cylindrical recesses, since there the intersection problem does not arise.
  • a particular embodiment of the invention is characterized in that the two are substantially circular cylindrical recesses are interconnected by a connecting channel.
  • Another particular embodiment of the invention is characterized in that the two substantially circular cylindrical recesses overlap in cross section.
  • the overlap increases the available storage space without the formation of sharp edges, which are critical with regard to high pressure resistance.
  • Another particular embodiment of the invention is characterized in that the two substantially circular-cylindrical recesses have the same diameter, and in that the connections are arranged only in the longitudinal direction of the main body interior cross-section.
  • the deformation resulting from the high pressure prevailing in the interior of the main body during operation is, seen in cross section, perpendicular to the connections at the largest and thus occurs in a region which is not so highly loaded.
  • Another particular embodiment of the invention is characterized in that the two substantially circular-cylindrical recesses have different diameters, and in that the connections only emanate from the lateral surface of the essentially circular-cylindrical recess with the smaller diameter.
  • Another particular embodiment of the invention is characterized in that the distance between the longitudinal axes of the two substantially circular cylindrical recesses is greater than or equal to the radius of the substantially circular cylindrical recess with the larger diameter. This ensures that the storage volume of the high-pressure fuel storage according to the invention is increased.
  • Another particular embodiment is characterized in that the transitions between the two substantially circular cylindrical recesses are rounded in cross section.
  • the additional rounding leads to a further increase in the high-pressure resistance of the high-pressure fuel accumulator according to the invention.
  • the high-pressure fuel accumulator shown in longitudinal section in Figure 1 comprises a tubular body 1. On the tubular body 1 are four Connecting pieces 2, 3, 4 and 5 formed. The connecting pieces 2, 3, 4 and 5 are used to connect high-pressure fuel lines.
  • the high-pressure fuel lines establish a connection between the interior of the tubular main body 1 and a high-pressure fuel pump (not shown) or with the injectors (not shown) of the internal combustion engine to be supplied.
  • first longitudinal bore 11 is formed by a first longitudinal bore 11 and a second longitudinal bore 12.
  • the longitudinal bores 11 and 12 are arranged parallel to each other.
  • the first longitudinal bore 11 has a diameter d 1 , which is significantly larger than the diameter d 2 of the second longitudinal bore 12.
  • the distance between the parallel center lines of the two longitudinal bores 11 and 12 is greater than the radius but smaller than the diameter d 1 of the first longitudinal bore eleventh
  • connection bore 13 is arranged radially in the base body 1 and opens into the second longitudinal bore 12.
  • the transition 14 between the first longitudinal bore 11 and the second longitudinal bore 12 is rounded.
  • the first longitudinal bore 11 in the tubular base body 1 fulfills the function of storing fuel during operation of the high-pressure fuel accumulator according to the invention.
  • the second longitudinal bore 12 in the tubular base body 1 fulfills the function of distributing the fuel during operation of the high-pressure fuel accumulator according to the invention.
  • FIGS. 3 to 8 differ mainly in the construction and arrangement of the individual elements. Therefore, in order to avoid repetition, in the following description of these embodiments, only the differences between the individual embodiments will be discussed. For simplicity, the same reference numerals will be used to designate like parts.
  • the high-pressure fuel accumulator shown in cross section in FIG. 3 has, like the previously described embodiment, a tubular basic body 1 with two parallel longitudinal bores 11 and 12.
  • the second longitudinal bore 12 has a smaller diameter d 2 than the first longitudinal bore 11 (d 1 ).
  • the transition 14 between the two longitudinal bores 11 and 12 is rounded.
  • connection bore 13 opens tangentially into the first and the second longitudinal bore 11 and 12.
  • the distance between the center lines of the longitudinal bores 11 and 12 corresponds to the radius of the first longitudinal bore 11.
  • connection bore 13 extends in a different direction as the connection bore 13 in the embodiment shown in Figure 3.
  • the connection bores 13 are arranged offset in the embodiments shown in Figures 3 and 4 by 90 ° to each other.
  • a third longitudinal bore 15 arranged in parallel in the tubular base body 1.
  • the third longitudinal bore 15 has a diameter d 3rd
  • the diameter d 3 is smaller than the diameter d 2 , which in turn is smaller than the diameter d 1 .
  • the connection bore 13 opens into the longitudinal bore 15 with the diameter d 3 .
  • connection bore 13 does not open, as in the embodiment shown in Figure 2 tangentially into the second connection hole 12 but, as can be seen in Figure 6, tangentially into the first connection hole 11.
  • the holes are arranged so that the connection bore 13 eccentric and smooth out of the first longitudinal bore 11 comes out.
  • connection hole 13 opens tangentially.
  • the transition region between the two longitudinal bores 11 and 12 is flat.
  • first longitudinal bore 11 and the second longitudinal bore 12 are formed separately in the tubular base body 1.
  • the longitudinal bores 11 and 12 are connected by a connecting bore with the diameter d 4 .
  • the Connecting bore opens tangentially into both longitudinal bores 11 and 12.
  • the connecting bore 13 has a diameter d 5 , which is greater than the diameter d 4 of the connecting bore.
  • the connection bore 13 opens tangentially into the second longitudinal bore 12.
  • the connection bore 13 extends in the same direction as the connection bore between the two longitudinal bores 11 and 12.

Claims (7)

  1. Accumulateur de carburant haute pression pour un système d'injection de carburant « Rampe commune » d'un moteur à combustion interne, comportant un corps de base tubulaire (1) dont l'habitacle (11, 12, 15) est en liaison avec plusieurs raccordements (2 à 5, 13);
    caractérisé en ce que
    l'habitacle est formé d'au moins deux évidements sensiblement de forme cylindrique circulaire (11, 12, 15) qui sont en liaison l'un avec l'autre et dont les axes longitudinaux sont parallèles, et les raccordements (13) ne sortent que de la surface de revêtement de l'un des évidements sensiblement de forme cylindrique circulaire (11, 12, 15) .
  2. Accumulateur de carburant haute pression selon la revendication 1,
    caractérisé en ce que
    les deux évidements sensiblement de forme cylindrique circulaire (11, 12) sont reliés par un canal de liaison.
  3. Accumulateur de carburant haute pression selon la revendication 1,
    caractérisé en ce que
    les deux évidements sensiblement de forme cylindrique circulaire (11, 12) se chevauchent dans la section transversale.
  4. Accumulateur de carburant haute pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les deux évidements sensiblement de forme cylindrique circulaire (11, 12) comportent les mêmes diamètres, et les raccordements (13) ne sont agencés que dans le sens longitudinal de la section transversale de l'habitable du corps de base.
  5. Accumulateur de carburant haute pression selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    les deux évidements sensiblement de forme cylindrique circulaire (11, 12) comportent des diamètres différents (d1, d2), et les raccordements (13) ne sortent que de la surface de revêtement de l'évidement sensiblement de forme cylindrique circulaire (12) avec le plus petit diamètre (d2).
  6. Accumulateur de carburant haute pression selon la revendication 5,
    caractérisé en ce que
    la distance entre les axes longitudinaux des deux évidements sensiblement de forme cylindrique circulaire (11, 12) est supérieure ou égale au rayon de l'évidement sensiblement de forme cylindrique circulaire (11) avec le plus grand diamètre (d1).
  7. Accumulateur de carburant haute pression selon la revendication 5 ou 6,
    caractérisé en ce que
    les transitions (14) entre les deux évidements sensiblement de forme cylindrique circulaire (11, 12, 15) sont arrondies dans la section transversale.
EP00967579A 1999-10-07 2000-09-19 Accumulateur de carburant haute pression Expired - Lifetime EP1137878B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19948339 1999-10-07
DE19948339A DE19948339C1 (de) 1999-10-07 1999-10-07 Kraftstoffhochdruckspeicher
PCT/DE2000/003245 WO2001025615A1 (fr) 1999-10-07 2000-09-19 Accumulateur de carburant haute pression

Publications (2)

Publication Number Publication Date
EP1137878A1 EP1137878A1 (fr) 2001-10-04
EP1137878B1 true EP1137878B1 (fr) 2006-06-07

Family

ID=7924831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00967579A Expired - Lifetime EP1137878B1 (fr) 1999-10-07 2000-09-19 Accumulateur de carburant haute pression

Country Status (6)

Country Link
US (1) US6637407B1 (fr)
EP (1) EP1137878B1 (fr)
JP (1) JP4445690B2 (fr)
CZ (1) CZ295449B6 (fr)
DE (2) DE19948339C1 (fr)
WO (1) WO2001025615A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10128715B4 (de) * 2001-05-04 2005-09-22 Mtu Friedrichshafen Gmbh Kraftstoffhochdruckleitung
DE10146741A1 (de) * 2001-09-22 2003-04-17 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE10152261A1 (de) * 2001-10-20 2003-04-30 Bosch Gmbh Robert Hochdruckspeicher wie Kraftstoffhochdruckspeicher
FI116158B (fi) 2002-04-08 2005-09-30 Waertsilae Finland Oy Mäntämoottorin polttoaineen syöttöjärjestelmä
DE10248800A1 (de) * 2002-10-19 2004-04-29 Robert Bosch Gmbh Innendruckbelastetes Bauteil, sowie Verfahren zur Herstellung eines innendruckbelasteten Bauteils mit nicht zylindrischem Querschnitt
EP1413744B1 (fr) * 2002-10-23 2005-12-28 Wärtsilä Schweiz AG Accumulateur de pression pour une rampe d'injection commune
DE10305078A1 (de) * 2003-02-07 2004-04-22 Robert Bosch Gmbh Kraftstoffhochdruckspeicher
DE10329052A1 (de) 2003-06-27 2005-01-13 Robert Bosch Gmbh Verbindung für Hochdruckräume von Kraftstoffinjektoren
JP2005140058A (ja) * 2003-11-07 2005-06-02 Denso Corp コモンレール
US7021291B2 (en) * 2003-12-24 2006-04-04 Cummins Inc. Juncture for a high pressure fuel system
FI120844B (fi) * 2007-05-31 2010-03-31 Waertsilae Finland Oy Polttoaineen syöttöjärjestelmän polttoainevarasto
DE102007045922A1 (de) 2007-09-26 2009-04-02 Bayer Cropscience Ag Wirkstoffkombinationen mit insektiziden und akariziden Eigenschaften
ATE548560T1 (de) * 2008-12-23 2012-03-15 Delphi Tech Holding Sarl Kraftstoffeinspritzsystem
JP2011069255A (ja) * 2009-09-24 2011-04-07 Daihatsu Motor Co Ltd 内燃機関の燃料デリバリパイプ
JP2011069254A (ja) * 2009-09-24 2011-04-07 Daihatsu Motor Co Ltd 内燃機関の燃料デリバリパイプ
EP2511517B1 (fr) * 2011-04-15 2015-04-01 Wärtsilä Schweiz AG Rail fluide haute pression

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29521402U1 (de) * 1995-12-23 1997-04-24 Bosch Gmbh Robert Kraftstoffeinspritzsystem
JP3841370B2 (ja) * 1996-12-07 2006-11-01 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
DE10006894A1 (de) * 1999-02-18 2000-08-24 Usui Kokusai Sangyo Kk Kraftstoffzufuhrleitungsanordnung
DE19945786C1 (de) * 1999-09-24 2000-11-16 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE19953577A1 (de) * 1999-11-08 2001-05-23 Bosch Gmbh Robert Kraftstoffhochdruckspeicher

Also Published As

Publication number Publication date
WO2001025615A1 (fr) 2001-04-12
CZ295449B6 (cs) 2005-08-17
JP4445690B2 (ja) 2010-04-07
DE50012917D1 (de) 2006-07-20
EP1137878A1 (fr) 2001-10-04
JP2003511605A (ja) 2003-03-25
CZ20011995A3 (cs) 2002-05-15
DE19948339C1 (de) 2000-12-14
US6637407B1 (en) 2003-10-28

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