EP2230397B1 - Ligne de haute pression pour système d'injection du carburant - Google Patents

Ligne de haute pression pour système d'injection du carburant Download PDF

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Publication number
EP2230397B1
EP2230397B1 EP10007052.3A EP10007052A EP2230397B1 EP 2230397 B1 EP2230397 B1 EP 2230397B1 EP 10007052 A EP10007052 A EP 10007052A EP 2230397 B1 EP2230397 B1 EP 2230397B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure line
injector
common rail
diameter
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
EP10007052.3A
Other languages
German (de)
English (en)
Other versions
EP2230397A1 (fr
Inventor
Holger Dr. Rapp
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2230397A1 publication Critical patent/EP2230397A1/fr
Application granted granted Critical
Publication of EP2230397B1 publication Critical patent/EP2230397B1/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
    • 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
    • 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
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding 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
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • 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
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations

Definitions

  • the invention relates to a high pressure line for a fuel injection system for an internal combustion engine.
  • fuel injection system 102 includes a fuel tank 104 from the fuel 106 by an electric or mechanical fuel pump 108 is promoted. Via a low-pressure fuel line 110, the fuel 106 is conveyed to a high-pressure fuel pump 111. From the high pressure fuel pump 111, the fuel 106 passes through a high pressure fuel line 112 to a common rail 114. On the common rail 114 a plurality of injectors 1 are connected, which inject the fuel 106 directly into combustion chambers 118 of an internal combustion engine, not shown. The hydraulic connection between the common rail 114 and injectors 1 via a respective high pressure line. 3
  • the injector 1 belonging to the combustion chamber 118 is opened.
  • the high pressure fuel 106 flows from the injector 1 into the combustion chamber 118.
  • the leaked amount of fuel subsequently flows from the common rail 114 to the injector 1.
  • the amplitude of the pressure wave described above is superimposed on the static common-rail pressure immediately after the beginning of an injection.
  • the pressure in the injector 1 is not constant, but is subject to considerable temporal variations. This applies in particular not only during the injection itself, but also for the period following an injection. Since the quantity of fuel injected into the combustion chamber 118 depends, inter alia, on the pressure prevailing during the injection in the injector 1, the above-mentioned pressure wave has a undesirable influence on the injection quantity.
  • JP 10213045 A From the JP 10213045 A is known a high-pressure line, at one end of a formed head is formed. This head has a rounding.
  • a check valve (not shown) can be provided parallel to the throttle (not shown).
  • a check valve (not shown) can be provided which opens in the direction of the injector 1.
  • this is the throttle as long as ineffective as fuel from the common rail 114 to the injector 1 flows; that is, during injection, this arrangement is ineffective.
  • such an arrangement with a check valve per injector is also very expensive.
  • Out FR 2 786 225 A1 is a high pressure line is known which connects a high pressure area with an injector. Within the high pressure line means are provided for reducing pressure fluctuations.
  • WO 01/42643 A1 a connecting piece is known, which takes over the seal between a housing, such as a high-pressure fuel storage, and a high-pressure line.
  • the diameter extension of the high pressure line is either frusto-conical or stepped executed.
  • one-piece high-pressure lines are also covered by this embodiment, in which a separate connecting piece with a diameter extension, in particular with a frusto-conical or conical diameter enlargement, is fastened to the common rail.
  • a separate connecting piece with a diameter extension in particular with a frusto-conical or conical diameter enlargement, is fastened to the common rail.
  • the diameter may increase along the length in a non-linear manner, resulting in a curved conical inner shape.
  • the above-described structural features of the high-pressure line according to the invention can be combined with one another in order to optimize the operating behavior of a special fuel injection system by means of the suitable selection and dimensioning of the high-pressure line according to the invention.
  • FIG. 1 which is a known from the prior art high-pressure line 3, which connects a common rail 114 with an injector 1 hydraulically, the already mentioned several times pressure wave and its temporal and local course in the high pressure line. 3 be explained in more detail.
  • the left of the high-pressure line 3, an x-p diagram is shown.
  • x represents a length coordinate of the high-pressure line 3, the zero point of which lies at the connection between the injector 1 and the high-pressure line 3.
  • the Y-axis of the diagram labeled "p" represents a pressure p (x) in the high-pressure line 3.
  • an xp diagram is shown, which represents the pressure curve in the high-pressure line 3 when the pressure wave moves from the injector 1 in the direction of the common rail 114.
  • the diagram on the left of the high-pressure line 3 shows a snapshot at a point in time in which there is a maximum 5 of the pressure wave between injector 1 and common rail 114.
  • the running direction of the pressure wave is shown by an arrow 7.
  • the common rail 114 acts as an open end with respect to the pressure wave with a static pressure.
  • the pressure wave is reflected, that is, it changes its direction and now runs from the common rail 114 in the direction of the injector 1.
  • changes the sign of the amplitude so that from a pressure reduction is a pressure increase.
  • This is indicated by the p-x diagram on the right of the high-pressure line 3.
  • the direction of the arrow 7 has reversed from the representation on the left side of the high-pressure line 3.
  • from the pressure reduction has become an increase in pressure, as the comparison of the pressure waves in the p-x diagrams left and right of the high pressure line 3 results.
  • the injector 1 If, however, the injector 1 is closed at the time when the reflected pressure wave reaches it, it represents a closed end for the pressure wave and the wave is - this time while maintaining its amplitude - again reflected towards the rail. Now finally forms a very weakly damped, standing wave in the line, the pressure in the injector 1 oscillates after an injection for a long time and there is a significant influence of the distance between two injections on the second injection.
  • a gradient dp / dt is qualitatively represented. This representation is not entirely correct, because in a px diagram a time course of the print "p" is not representable; However, because of the constant propagation speed of the pressure wave in the high-pressure line 3 is a direct relationship between the slope of the edge of the pressure wave, as in the px-diagram according FIG. 1 is shown and as it is defined in connection with the invention, namely as a change with time of the fuel pressure in the high-pressure line 3, here also referred to as gradient dp / dt.
  • FIG. 2 a first embodiment of a one-piece high-pressure line 3 according to the invention is shown.
  • the high-pressure line 3 has a diameter-expanded region 3.4.
  • the diameter-expanded portion 3.4 is conical, with the end with the larger diameter in the common rail 114 opens.
  • the invention is not limited to conical diameter expansions, but may also include, for example, stepped diameter extensions.
  • An important effect of this diameter-extended region 3.4 is that the incoming pressure wave is not abruptly reflected at the end of the line, but that it is over the entire diameter-expanded area 3.4 is partially reflected. The remainder of the blast wave, which reaches the common rail 114, is reflected there in the manner previously described and changes sign.

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 (3)

  1. Conduite haute pression (3) pour un système d'injection de carburant pour un moteur à combustion interne, la conduite haute pression (3) reliant une rampe commune (114) et un injecteur (1), une extrémité de la conduite haute pression (3) présentant un élargissement de diamètre (3.4) et le diamètre de la conduite haute pression (3) augmentant en continu dans la région de l'élargissement de diamètre (3.4), l'extrémité ayant le plus grand diamètre débouchant dans la rampe commune (114), caractérisée en ce que l'élargissement de diamètre (3.4) augmente sous forme tronconique ou sous forme étagée.
  2. Conduite haute pression selon la revendication 1, caractérisée en ce que la conduite haute pression (3) est réalisée d'une seule pièce et reçoit une pièce de raccordement séparée avec un élargissement de diamètre (3,4), en particulier avec un élargissement de diamètre de forme tronconique ou conique et en ce que la pièce de raccordement séparée est fixée à la rampe commune (114).
  3. Installation d'injection de carburant (102) pour un moteur à combustion interne comprenant une rampe commune (114) et un injecteur (1) par cylindre du moteur à combustion interne et avec une conduite haute pression (3) reliant hydrauliquement la rampe commune (114) et l'injecteur (1), caractérisée en ce que la conduite haute pression (3) est une conduite haute pression (3) selon l'une quelconque des revendications précédentes.
EP10007052.3A 2003-02-25 2003-08-21 Ligne de haute pression pour système d'injection du carburant Expired - Lifetime EP2230397B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003107871 DE10307871A1 (de) 2003-02-25 2003-02-25 Hochdruckleitung für eine Kraftstoffeinspritzanlage
EP03811301A EP1611342B1 (fr) 2003-02-25 2003-08-21 Conduite haute pression pour un systeme d'injection de carburant

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP03811301A Division EP1611342B1 (fr) 2003-02-25 2003-08-21 Conduite haute pression pour un systeme d'injection de carburant
EP03811301.5 Division 2003-08-21

Publications (2)

Publication Number Publication Date
EP2230397A1 EP2230397A1 (fr) 2010-09-22
EP2230397B1 true EP2230397B1 (fr) 2016-10-12

Family

ID=32797714

Family Applications (2)

Application Number Title Priority Date Filing Date
EP03811301A Expired - Lifetime EP1611342B1 (fr) 2003-02-25 2003-08-21 Conduite haute pression pour un systeme d'injection de carburant
EP10007052.3A Expired - Lifetime EP2230397B1 (fr) 2003-02-25 2003-08-21 Ligne de haute pression pour système d'injection du carburant

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP03811301A Expired - Lifetime EP1611342B1 (fr) 2003-02-25 2003-08-21 Conduite haute pression pour un systeme d'injection de carburant

Country Status (5)

Country Link
EP (2) EP1611342B1 (fr)
JP (1) JP2006514201A (fr)
CN (1) CN1745243B (fr)
DE (1) DE10307871A1 (fr)
WO (1) WO2004076846A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101223352B (zh) * 2005-07-18 2010-12-08 甘瑟-许德罗玛格股份公司 用于内燃机的蓄压式喷射系统
AT501573B1 (de) * 2006-06-13 2008-05-15 Avl List Gmbh Hydraulische vorrichtung mit zumindest einem druckspeicher
DE102005051005A1 (de) * 2005-10-25 2007-04-26 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005060021A1 (de) * 2005-12-15 2007-06-28 Siemens Ag Angestauchte Drossel an Leitungsenden von Hochdruckleitungen für Einspritzsysteme
AT503660B1 (de) * 2006-06-13 2007-12-15 Bosch Gmbh Robert Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
DE102007025617A1 (de) 2007-06-01 2008-12-04 Robert Bosch Gmbh Kraftstoffinjektor mit geringem Verschleiß
DE102008015143A1 (de) * 2008-03-20 2009-09-24 GM Global Technology Operations, Inc., Detroit Brennstoffversorgungssystem für ein Kraftfahrzeug, Verfahren zum Betreiben eines Brennstoffversorgungssystems und Verfahren zum Auslegen eines Brennstoffversorgungssystems
FR2929344A3 (fr) * 2008-03-31 2009-10-02 Renault Sas Circuit de retour de carburant pour dispositif d'injection de carburant et dispositif d'injection de carburant associe
AT509877B1 (de) * 2010-11-02 2011-12-15 Bosch Gmbh Robert Vorrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine
JP2013079594A (ja) * 2011-10-03 2013-05-02 Usui Kokusai Sangyo Kaisha Ltd コモンレール式燃料噴射システム
US9272437B2 (en) 2012-10-31 2016-03-01 Flow International Corporation Fluid distribution components of high-pressure fluid jet systems
JP6031728B2 (ja) * 2013-10-24 2016-11-24 愛三工業株式会社 燃料供給装置
US9884406B2 (en) 2014-01-15 2018-02-06 Flow International Corporation High-pressure waterjet cutting head systems, components and related methods
EP3032086A1 (fr) * 2014-12-08 2016-06-15 Wärtsilä Finland Oy Agencement d'injection de carburant
JP6409685B2 (ja) * 2015-06-03 2018-10-24 株式会社デンソー 燃料供給装置
US10596717B2 (en) 2015-07-13 2020-03-24 Flow International Corporation Methods of cutting fiber reinforced polymer composite workpieces with a pure waterjet
CN105840373B (zh) * 2016-03-24 2019-06-25 中国北方发动机研究所(天津) 一种控制喷油“水击”压力波的装置
CN109268343B (zh) * 2017-07-18 2022-02-22 罗伯特·博世有限公司 用于确定液压系统的执行元件的故障的方法和记录介质
DE102017126642A1 (de) 2017-11-13 2019-05-16 Volkswagen Aktiengesellschaft Vorrichtung zur Reduzierung von Druckwellenschwingungen in einer Einspritzvorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10213045A (ja) * 1996-11-30 1998-08-11 Usui Internatl Ind Co Ltd コモンレールにおける分岐接続体の接続構造

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GB2293412A (en) * 1994-09-13 1996-03-27 Cummins Engine Co Ltd Control of turbocharged engine fuel injection
JPH1030521A (ja) * 1996-07-12 1998-02-03 Denso Corp 燃料噴射装置
JPH11200987A (ja) * 1998-01-07 1999-07-27 Toyota Autom Loom Works Ltd 内燃機関の蓄圧式燃料噴射系の慣性過給システム
SE521406C2 (sv) * 1998-10-23 2003-10-28 Scania Cv Ab Bränsleinsprutningsanordning för förbränningsmotor
FR2786225B1 (fr) * 1998-11-24 2000-12-22 Inst Francais Du Petrole Systeme d'injection de carburant sous haute pression dans un moteur a combustion interne a injection directe
DE19959105A1 (de) * 1999-12-08 2001-06-21 Bosch Gmbh Robert Anschlussstutzen und Gehäuse, insbesondere Kraftstoffhochdruckspeicher, mit vorgespannt angeschweißtem Anschlussstutzen für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen
DE10057683B4 (de) * 2000-11-21 2005-10-06 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung
DE10060811A1 (de) 2000-12-07 2002-06-13 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen
FR2818732B1 (fr) * 2000-12-22 2004-05-28 Renault Procede d'amortissement des ondes de pression dans une ligne hydraulique, et dispositif d'injection a rampe commune mettant en oeuvre ce procede
DE10105031A1 (de) * 2001-02-05 2002-08-14 Bosch Gmbh Robert Vorrichtung zur Dämpfung von Druckpulsationen in Hochdruckeinspritzsystemen

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
JPH10213045A (ja) * 1996-11-30 1998-08-11 Usui Internatl Ind Co Ltd コモンレールにおける分岐接続体の接続構造

Also Published As

Publication number Publication date
DE10307871A1 (de) 2004-09-02
EP1611342A1 (fr) 2006-01-04
CN1745243A (zh) 2006-03-08
EP2230397A1 (fr) 2010-09-22
EP1611342B1 (fr) 2012-02-29
WO2004076846A1 (fr) 2004-09-10
CN1745243B (zh) 2013-05-01
JP2006514201A (ja) 2006-04-27

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