EP1793119A1 - 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
EP1793119A1
EP1793119A1 EP06122313A EP06122313A EP1793119A1 EP 1793119 A1 EP1793119 A1 EP 1793119A1 EP 06122313 A EP06122313 A EP 06122313A EP 06122313 A EP06122313 A EP 06122313A EP 1793119 A1 EP1793119 A1 EP 1793119A1
Authority
EP
European Patent Office
Prior art keywords
pressure
fuel line
section
fuel
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.)
Granted
Application number
EP06122313A
Other languages
German (de)
English (en)
Other versions
EP1793119B1 (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 fuel injection device for an internal combustion engine according to the preamble of claim 1.
  • Such a fuel injection device is characterized by the EP 1 162 364 A known.
  • This fuel injection device has a high-pressure accumulator in which fuel is stored under high pressure. From the high-pressure accumulator, at least one high-pressure fuel line leads off to at least one injector, through which fuel is injected at the internal combustion engine. In the flow path of the fuel from the high-pressure accumulator into the at least one high-pressure fuel line, a flow area narrowed in cross-section is provided, followed by a flow area extending in cross-section to the high-pressure fuel line. The expanding flow area is conical.
  • This design ensures that pressure waves are attenuated from the high-pressure fuel line from the injector into the high-pressure accumulator, while the fuel flow from the high-pressure accumulator is only slightly influenced in the high-pressure fuel line to the injector.
  • the restricted flow area and the expanding flow area are in this known fuel injector at one between the high-pressure accumulator and the high-pressure fuel line formed component formed.
  • the fuel injector requires a large space and a large manufacturing and assembly costs.
  • the high-pressure fuel line according to the invention has the advantage that the flow cross-sectional constriction is formed in this itself, so that no additional component 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 shows a fuel injection device for an internal combustion engine in a schematic representation and Figure 2 shows a high-pressure fuel line of the fuel injection device in an enlarged view in a longitudinal section along line II-II in Figure 1.
  • FIG. 1 shows a fuel injection device for an internal combustion engine of a motor vehicle.
  • the internal combustion engine is preferably a self-igniting internal combustion engine and has at least one or more cylinders 6, of which only one is shown in FIG.
  • 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 in the outer cross-section compared to the remaining area of the high-pressure fuel line 18 enlarged connection 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 in 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)
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 true EP1793119A1 (fr) 2007-06-06
EP1793119B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2090772A1 (fr) * 2008-02-15 2009-08-19 Continental Automotive GmbH Ensemble de couplage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019204150A1 (de) * 2019-03-26 2020-10-01 Robert Bosch Gmbh Hochdruckspeicher für Kraftstoffe, Kraftstoffsystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000027731A (ja) * 1998-07-07 2000-01-25 Usui Internatl Ind Co Ltd コモンレール用噴射管
EP1162364A1 (fr) 2000-06-08 2001-12-12 Toyota Jidosha Kabushiki Kaisha Dispositif d'injection de combustible
FR2845129A1 (fr) * 2002-09-30 2004-04-02 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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000027731A (ja) * 1998-07-07 2000-01-25 Usui Internatl Ind Co Ltd コモンレール用噴射管
EP1162364A1 (fr) 2000-06-08 2001-12-12 Toyota Jidosha Kabushiki Kaisha Dispositif d'injection de combustible
FR2845129A1 (fr) * 2002-09-30 2004-04-02 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2090772A1 (fr) * 2008-02-15 2009-08-19 Continental Automotive GmbH Ensemble de couplage

Also Published As

Publication number Publication date
DE102005057951A1 (de) 2007-06-06
ATE423274T1 (de) 2009-03-15
EP1793119B1 (fr) 2009-02-18
DE502006002870D1 (de) 2009-04-02

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