EP1793119B1 - Système d'injection de carburant pour moteur à combustion interne - Google Patents

Système d'injection de carburant pour moteur à combustion interne Download PDF

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Publication number
EP1793119B1
EP1793119B1 EP06122313A EP06122313A EP1793119B1 EP 1793119 B1 EP1793119 B1 EP 1793119B1 EP 06122313 A EP06122313 A EP 06122313A EP 06122313 A EP06122313 A EP 06122313A EP 1793119 B1 EP1793119 B1 EP 1793119B1
Authority
EP
European Patent Office
Prior art keywords
pressure
fuel line
pressure fuel
accumulator
injector
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.)
Not-in-force
Application number
EP06122313A
Other languages
German (de)
English (en)
Other versions
EP1793119A1 (fr
Inventor
Wolfgang Braun
Volkmar Kern
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 EP1793119A1 publication Critical patent/EP1793119A1/fr
Application granted granted Critical
Publication of EP1793119B1 publication Critical patent/EP1793119B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M55/04—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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet

Definitions

  • the invention relates to a high-pressure fuel line and a fuel injection system with high-pressure fuel line according to the preamble of claim 1 and of claim 5.
  • Such a high-pressure fuel line and such a fuel injection system is characterized by the JP 2000 027731 A known.
  • an injector of the fuel injection device is connected to a high-pressure accumulator.
  • a flow cross-sectional constriction is arranged in relation to the remaining flow cross-section between the injector and the high-pressure accumulator in the end region of the high-pressure fuel line facing the high-pressure accumulator.
  • a separate component is used, which has a smaller diameter in relation to the inner diameter of the high-pressure fuel line bore. This separate component must be inserted in a complex and therefore associated with high cost manufacturing process in the high-pressure fuel line and fixed in it so that it remains safe in the high-pressure fuel line.
  • EP-A-1 707 793 is also a high-pressure fuel line known in which a separate component is used to form a flow cross-sectional constriction in the high-pressure fuel line, which is provided with a flow cross-sectional constriction darestellenden bore.
  • This high-pressure fuel line is thus complicated and expensive to manufacture.
  • the high-pressure fuel line according to the invention with the features of claim 1 has the advantage that it is simple and inexpensive to manufacture, as in this no separate component for forming the flow cross-sectional constriction is required.
  • the fuel injection device according to claim 5 has the advantage that it requires a small space and is inexpensive to produce.
  • FIG. 1 a fuel injection device for an internal combustion engine in a schematic representation
  • FIG. 2 a fuel high-pressure line of the fuel injection device in an enlarged view in a longitudinal section along line II-II in FIG. 1 ,
  • FIG. 1 a fuel injection device for an internal combustion engine of a motor vehicle is shown.
  • the internal combustion engine is preferably a self-igniting internal combustion engine and has at least one or more cylinders 6, of which in FIG. 1 only one is shown.
  • the fuel injection device has a feed pump 10, is conveyed by the fuel from a reservoir 12 to a high-pressure pump 14.
  • fuel is conveyed via at least one hydraulic line 15 under high pressure in a high-pressure accumulator 16.
  • injectors 20 are arranged via high-pressure fuel lines 18 to the cylinders 6 of the internal combustion engine.
  • a control valve 22 is arranged, by means of which the injector 20 can be opened to a fuel injection or can be closed to complete a fuel injection.
  • the control valves 22 of the injectors 20 are connected to an electronic control device 24 and are driven by them depending on operating parameters of the internal combustion engine.
  • the control valves 22 may each have an electromagnetic or a piezoelectric actuator.
  • the high pressure accumulator 16 is for example tubular and the high-pressure fuel lines 18 to the injectors 20 lead from the periphery of the high pressure accumulator 16.
  • the high-pressure accumulator 16 is tuned in its volume to the requirements of the fuel injection device.
  • the high-pressure fuel lines 18 are designed in a known manner, for example, as metal pipes made of steel, in particular high-strength steel, with sufficient strength and are for example by means of Screw connections connected to the high-pressure accumulator 16.
  • the high-pressure fuel lines 18 have at their ends connected to the high-pressure accumulator 16 an enlarged outer cross-section with respect to the remaining region of the high-pressure fuel line 18 connecting piece 30 which tapers approximately conically towards the high-pressure accumulator 16 and into a correspondingly shaped receptacle 32 with conical contact surface on the high pressure accumulator 16th is inserted.
  • a union nut 33 of the connecting piece 30 is clamped in the receptacle 32 and the seal at the transition between the high-pressure accumulator 16 and the high-pressure fuel line 18 ensured.
  • each high-pressure fuel line 18 which is for example a bore, and can flow through the fuel from the high-pressure accumulator 16 into the respective high-pressure fuel line 18.
  • the high-pressure fuel line 18 has a constant inner cross-section over most of its length, which is preferably circular and has a diameter d1.
  • this has a reduced inner cross-section, which is preferably also circular and has a diameter d2. Due to the reduced diameter d2, a flow cross-sectional constriction 36 is formed in the high-pressure fuel line 18.
  • the transition from the diameter d1 to the diameter d2 in the high-pressure fuel line 18 preferably runs at least approximately conically, so that in a transition region 38, the inner diameter of the high-pressure fuel line 18 gradually decreases from d1 to d2.
  • the transition region 38 has one for the respective fuel injector fixed length 1 on.
  • the diameter d2 is also set in relation to the diameter d1 suitable for the respective fuel injection device.
  • the cone angle of the transition region 38 is also suitably chosen.
  • the diameter of the opening 34 in the high-pressure accumulator 16 is greater than or equal to the diameter d2 of the flow cross-sectional constriction 36.
  • the flow cross-sectional constriction 36, the flow of fuel from the high-pressure accumulator 16 to Injector 20 is only slightly affected, while the propagation of pressure waves from the injector 20 through the high-pressure fuel line 18 into the high-pressure accumulator 16 is substantially prevented.
  • the flow cross-sectional constriction 36 and the transition region 38 in the high-pressure fuel line 18 can be produced, for example, by means of a drawing, stretching or compression deformation method of the high-pressure fuel line.
  • the high pressure accumulator 16 of the fuel injection device can also be omitted, in which case each injector 20 is connected directly to the high pressure pump 14 upper with a manifold of the high pressure pump.

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 (5)

  1. Conduite haute pression pour carburant pour un dispositif d'injection de carburant d'un moteur à combustion interne, un injecteur (20) du dispositif d'injection de carburant étant connecté par la conduite haute pression pour carburant (18) à un accumulateur haute pression (16) ou une pompe haute pression (14), et entre l'injecteur (20) et l'accumulateur haute pression (16) ou la pompe haute pression (14), un étranglement de la section transversale d'écoulement (36), par rapport à la section transversale d'écoulement usuelle, étant réalisé entre l'injecteur (20) et l'accumulateur haute pression (16) ou la pompe haute pression (14) dans la région d'extrémité de la conduite haute pression pour carburant (18) tournée vers l'accumulateur haute pression (16) ou la pompe haute pression (14), caractérisée en ce que l'étranglement de la section transversale d'écoulement (36) est formé par un rétrécissement de la section transversale intérieure (d2) de la conduite haute pression pour carburant (18) elle-même par rapport à la section transversale d'écoulement usuelle (d1) de la conduite haute pression pour carburant (18), sans devoir insérer de composant séparé dans la conduite haute pression pour carburant (18).
  2. Conduite haute pression pour carburant selon la revendication 1, caractérisée en ce que la transition (38) entre le rétrécissement de la section transversale intérieure (d2) et le reste de la section transversale intérieure (d1) de la conduite haute pression pour carburant (18) est réalisé au moins approximativement sous forme conique.
  3. Conduite haute pression pour carburant selon la revendication 1 ou 2, caractérisée en ce que l'étranglement de la section transversale d'écoulement (36) s'étend jusqu'à l'extrémité de la conduite haute pression pour carburant (18) tournée vers l'accumulateur haute pression (16) ou la pompe haute pression (14).
  4. Conduite haute pression pour carburant selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'elle présente, à son extrémité tournée vers l'accumulateur haute pression (16) ou la pompe haute pression (14), une tubulure de raccordement (30) de section transversale extérieure agrandie par rapport au reste de la section transversale extérieure de la conduite haute pression pour carburant (18), et en ce que le rétrécissement de la section transversale intérieure (d2) est disposé dans la tubulure de raccordement (30).
  5. Système d'injection de carburant pour un moteur à combustion interne comprenant une pompe haute pression (14), qui refoule du carburant sous une haute pression en vue de l'injection de carburant, comprenant au moins un injecteur (20) pour l'injection de carburant dans le moteur à combustion interne, l'au moins un injecteur (20) étant connecté par le biais d'une conduite haute pression pour carburant (18) à la pompe haute pression (14) ou à un accumulateur haute pression (16) dans lequel refoule la pompe haute pression (14), caractérisé en ce que la conduite haute pression pour carburant (18) est réalisée selon l'une quelconque des revendications précédentes.
EP06122313A 2005-12-05 2006-10-16 Système d'injection de carburant pour moteur à combustion interne Not-in-force EP1793119B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005057951A DE102005057951A1 (de) 2005-12-05 2005-12-05 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP1793119A1 EP1793119A1 (fr) 2007-06-06
EP1793119B1 true EP1793119B1 (fr) 2009-02-18

Family

ID=37712448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06122313A Not-in-force EP1793119B1 (fr) 2005-12-05 2006-10-16 Système d'injection de carburant pour moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP1793119B1 (fr)
AT (1) ATE423274T1 (fr)
DE (2) DE102005057951A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2090772B1 (fr) * 2008-02-15 2012-04-25 Continental Automotive GmbH Ensemble de couplage
DE102019204150A1 (de) * 2019-03-26 2020-10-01 Robert Bosch Gmbh Hochdruckspeicher für Kraftstoffe, Kraftstoffsystem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4020503B2 (ja) * 1998-07-07 2007-12-12 臼井国際産業株式会社 コモンレール用噴射管
JP3558008B2 (ja) 2000-06-08 2004-08-25 トヨタ自動車株式会社 燃料噴射装置
FR2845129B1 (fr) * 2002-09-30 2006-04-28 Delphi Tech Inc Insert du type diode fluidique pour attenuer des ondes de pression, et rail commun equipe de tels inserts
EP1707793A1 (fr) * 2005-03-10 2006-10-04 Dualon International Holding SA Système de conduits à haute pression

Also Published As

Publication number Publication date
DE502006002870D1 (de) 2009-04-02
EP1793119A1 (fr) 2007-06-06
DE102005057951A1 (de) 2007-06-06
ATE423274T1 (de) 2009-03-15

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