EP2917556B1 - Brennstoffeinspritzventil und brennstoffeinspritzanlage mit einem brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil und brennstoffeinspritzanlage mit einem brennstoffeinspritzventil Download PDF

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Publication number
EP2917556B1
EP2917556B1 EP13765298.8A EP13765298A EP2917556B1 EP 2917556 B1 EP2917556 B1 EP 2917556B1 EP 13765298 A EP13765298 A EP 13765298A EP 2917556 B1 EP2917556 B1 EP 2917556B1
Authority
EP
European Patent Office
Prior art keywords
valve needle
fuel
valve
fuel injection
extension
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
EP13765298.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2917556A1 (de
Inventor
Christoph HAIBLE
Marco Vorbach
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 EP2917556A1 publication Critical patent/EP2917556A1/de
Application granted granted Critical
Publication of EP2917556B1 publication Critical patent/EP2917556B1/de
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
    • F02M55/008—Arrangement of fuel passages inside of 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
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/50—Arrangement of fuel distributors, e.g. with means for supplying equal portion of metered fuel to 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
    • 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 fuel injection valve, which is used in particular for fuel injection systems of internal combustion engines, and a fuel injection system with such a fuel injection valve. Specifically, the invention relates to the field of fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • a fuel injection device with at least one fuel injection valve and a fuel rail with at least one connecting piece known.
  • the fuel injection valve is introduced into a receiving opening of the connecting piece.
  • the fuel rail has a discharge port for delivering fuel to the fuel injector.
  • a pressure wave conductor connecting both is provided in such a way that dynamic pressure fluctuations in the fuel injection valve can largely be conducted past the volume of the receiving opening of the connecting piece.
  • annular leakage gap is formed, which allows a slow Druckauf- and -development in the connecting piece according to the system pressure, ie a static pressure equalization between the pressure waveguide and the wall of the discharge opening.
  • the from the DE 10 2007 049 357 A1 known fuel injection device has the disadvantage that a choke is formed by the pressure waveguide, which unfavorably affects the amount of fuel supplied per unit time at a given size of the discharge opening.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that an improved mode of operation is achieved. Specifically, improved vibration damping can be achieved between the fuel injector and a fuel rail. In addition, pressure oscillations that affect a quantity scattering can be reduced.
  • the valve needle extension according to the invention can be actuated at least indirectly by the valve needle. This includes indirect as well as direct actuation of the valve needle extension by the valve needle. An indirect actuation can take place via one or more intermediate elements, wherein preferably a purely mechanical power transmission is realized.
  • a configuration in which the valve needle extension can be actuated directly by the valve needle is particularly advantageous. This reduces the number of parts needed and ensures reliable operation. In addition, this can be achieved by a high rigidity in the power transmission.
  • the fuel inlet is provided in an advantageous manner at a nozzle-distal end of the housing of the fuel injection valve.
  • a linear transmission of force from the valve needle to the valve needle extension is possible.
  • the valve needle and the valve needle extension can be arranged on a common axis, namely the longitudinal axis of the valve needle.
  • a receiving sleeve is provided at a nozzle distal end of the valve needle, that a valve needle near end of the valve needle extension is inserted into the receiving sleeve and that the valve needle extension is connected via the receiving sleeve with the nozzle distal end of the valve needle.
  • the receiving sleeve can be connected for example by welding or soldering to the nozzle-distal end of the valve needle and / or the valve-near end of the valve needle extension.
  • valve needle extension in the region of the fuel inlet can be moved by the opening stroke of the valve needle in such a way that a throttling action at the fuel inlet for a fuel introduced into the housing via the fuel feed increases in relation to a closed position of the valve needle.
  • valve needle extension in the closed position contributes nothing to the throttling effect on the fuel feed for the fuel introduced into the housing via the fuel feed.
  • the throttle effect is amplified so that a throttle point is formed and thus a hydraulic vibration decoupling can be generated. The thus not constantly existing throttle thus enables better and faster filling and improved pressure balance of the pressurized parts.
  • valve needle extension is designed as a pin-shaped valve needle extension.
  • the pin-shaped valve needle extension can be performed when opening the fuel injection valve in an advantageous manner from the nozzle distal end of the housing of the fuel injection valve.
  • the valve needle extension can be moved in the area of the fuel inlet such that the valve needle distal end of the valve needle extension is pushed out of the housing.
  • a passage opening is configured, wherein a needle remote end of the valve needle in and optionally through the passage opening of the wall of the fuel distributor is movable by the opening stroke of the valve needle.
  • a pin-shaped valve needle extension can in this case be designed so long that it moves in the open state of the fuel injection valve in or through the passage opening of the wall of the fuel distributor. In this case, it may be possible to dispense with a separate guidance of the valve needle extension by a suitable connection of the valve needle extension with the valve needle. Depending on the application, however, it may be possible to guide the valve needle extension, in particular with respect to a longitudinal axis of the valve needle.
  • a throttle For hydraulic decoupling of the resulting vibrations thus, for example, a throttle can be used.
  • the throttle is not achieved by installing a permanently installed constriction, but generated dynamically by the described embodiment even when opening the valve needle.
  • This throttling takes place by the valve needle extension when opening the fuel injection valve in the region of the fuel inlet, in particular in an inflow geometry of the fuel injection valve immersed and thus generates the throttle point and thus a hydraulic vibration decoupling, which ends itself again when closing. Since the throttle ratios are changed together with the opening and closing of the fuel injection valve, is given by the non-existent throttle also a better and faster filling and pressure balance of the pressurized parts.
  • the throttling serves advantageously not only to reduce noise, but also to reduce pressure oscillations, which affect a quantity scattering.
  • This reduction of pressure oscillations and pressure pulsations results in a more uniform quantity delivery of the fuel injection valve from injection to injection.
  • emissions, consumption and a power output are better controllable.
  • Fig. 1 shows a fuel injection valve 1 in a schematic representation according to an embodiment.
  • the fuel injection valve 1 is used in particular for a fuel injection system 2 (FIG. Fig. 2 ) of internal combustion engines.
  • the fuel injection valve 1 can in this case be designed in particular for high-pressure injection in internal combustion engines.
  • Such an internal combustion engine can be, for example, a mixture-compression, spark-ignited internal combustion engine.
  • the fuel injection valve 1 according to the invention and the fuel injection system 2 according to the invention are also suitable for other applications.
  • the fuel injection valve 1 has a housing 3, which may be configured as a multi-part housing 3. On the housing 3, a fuel inlet 4 is provided.
  • the housing 3 comprises a nozzle body 5, in which a valve needle 6 is guided along an axis 7, which is the longitudinal axis 7 of the valve needle 6.
  • the valve needle 6 extends in this embodiment along the longitudinal axis 7 through the nozzle body 5 and partially through the housing 3.
  • a schematically illustrated valve closing body 8 is configured at the valve needle 6 .
  • the valve closing body 8 of the valve needle 6 is located at a nozzle-near end 9 of the housing third
  • the fuel inlet 4 is located in this embodiment at a nozzle distal end 10 of the housing. 3
  • the fuel injection valve 1 has a valve needle extension 15, which is aligned on the longitudinal axis 7 of the valve needle 6.
  • the valve needle 6 can be actuated in an opening direction 16 along the longitudinal axis 7.
  • Such an operation can be done for example via a magnetic actuator.
  • an opening stroke of the valve needle 6 is effected.
  • the valve needle extension 15 is moved in the region of the fuel inlet 4.
  • a valve needle near end 17 of the valve needle extension 15 is located at a nozzle distal end 18 of the valve needle 6 at.
  • a direct actuation of the valve needle extension 15 is given by the valve needle 6.
  • the opening stroke of the valve needle 6 in the opening direction 16 thus causes an equal stroke of the valve needle extension 15 at the fuel inlet. 4
  • Fig. 2 shows the fuel injection system 2 with the in Fig. 1 illustrated fuel injector 1 according to the embodiment in an excerptive, schematic sectional view in a closed state of the valve needle 6 of the fuel injector 1.
  • a receiving sleeve 20 is provided at the nozzle distal end 18 of the valve needle 6.
  • the valve needle near end 17 of the valve needle extension 15 is inserted into the receiving sleeve 20.
  • the receiving sleeve 20 may be connected, for example, by welding or soldering with the nozzle distal end 18 of the valve needle 6. Accordingly, a connection of the valve needle near end 17 of the valve needle extension 15 with the receiving sleeve 20 is possible by welding or soldering.
  • the end 17 of the valve needle extension 15 can also be pressed into the receiving sleeve 20.
  • the valve needle extension 15 via the receiving sleeve 20 is reliably connected to the nozzle-distal end 18 of the valve needle 6.
  • valve needle extension 15 Through this connection of the valve needle extension 15 with the valve needle 6, an alignment of the valve needle extension 15 with respect to the longitudinal axis 7 of the valve needle 6 is achieved.
  • the valve needle extension 15 is located on the longitudinal axis 7 of the valve needle 6. An additional guidance of the valve needle extension 15 is thus not required.
  • the valve needle extension 15 is designed as a pin-shaped valve needle extension 15.
  • the fuel injection system 2 also has a fuel distributor 21.
  • the fuel distributor 21 in this embodiment comprises a distributor tube 22 and a connecting piece 23.
  • the connecting piece 23 may be configured, for example, as a cup-shaped connecting piece 23.
  • This embodiment of the fuel distributor 21 designed as a fuel rail 21.
  • the manifold 22 of the fuel distributor 21 has a wall 24.
  • a passage opening 25 is configured in the region of the connecting piece 23. Through the passage opening 25 can be performed in operation from a fuel chamber 26 formed in the interior of the manifold 22 under high pressure fuel in the fuel inlet 4 at the nozzle distal end 10 of the housing 3.
  • a sealing ring 27 is provided between the connecting piece 23 and the fuel injection valve 1.
  • valve needle remote end 28 of the valve needle extension 15 is slightly spaced from the passage opening 25 of the manifold 22. This avoids that the valve needle extension 15 causes a throttle effect for the supplied fuel.
  • the valve needle extension 15 thus contributes at least approximately nothing in the closed position to the throttling action on the fuel inlet 4 for the fuel introduced into the housing 3 via the fuel inlet 4.
  • Fig. 3 shows the in Fig. 2 illustrated fuel injection system 2 with the fuel injection valve 1 and the fuel distributor 21 in an excerpt, schematic sectional view according to the embodiment in an open state of the valve needle 6 of the fuel injection valve 1.
  • the valve needle 6 is now adjusted in the opening direction 16 by a certain opening stroke. This directly causes an equal adjustment of the valve needle extension 15 in the opening direction 16.
  • the valve needle distal end 28 of the valve needle extension 15 firstly enters the passage opening 25 Fig. 3 illustrated position, the valve needle remote end 28 of the valve needle extension 15 extends even through the through hole 25 of the wall 24 of the manifold 22nd
  • valve needle extension 15 throttling for the fuel supplied to the fuel inlet 4. Because the opening stroke of the valve needle 6, the valve needle extension 15 is moved in the region of the fuel inlet 4 so that the throttle effect on the fuel inlet 4 for the via the fuel inlet 4 guided in the housing 3 fuel relative to the closed position of the valve needle 6 increases. In this embodiment will through the opening stroke of the valve needle 6, the valve needle extension 15 pushed out of the nozzle-distal end 10 of the housing 3.
  • valve needle 6 is designed as an inwardly opening valve needle 6 of the fuel injection valve 1
  • valve needle extension 15 is pushed out of the housing 3 directly by opening the valve needle 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP13765298.8A 2012-11-09 2013-09-09 Brennstoffeinspritzventil und brennstoffeinspritzanlage mit einem brennstoffeinspritzventil Not-in-force EP2917556B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012220491.1A DE102012220491A1 (de) 2012-11-09 2012-11-09 Brennstoffeinspritzventil und Brennstoffeinspritzanlage mit einem Brennstoffeinspritzventil
PCT/EP2013/068560 WO2014072097A1 (de) 2012-11-09 2013-09-09 Brennstoffeinspritzventil und brennstoffeinspritzanlage mit einem brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP2917556A1 EP2917556A1 (de) 2015-09-16
EP2917556B1 true EP2917556B1 (de) 2017-07-26

Family

ID=49223729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13765298.8A Not-in-force EP2917556B1 (de) 2012-11-09 2013-09-09 Brennstoffeinspritzventil und brennstoffeinspritzanlage mit einem brennstoffeinspritzventil

Country Status (7)

Country Link
US (1) US20150285199A1 (ko)
EP (1) EP2917556B1 (ko)
JP (1) JP6077666B2 (ko)
KR (1) KR20150079683A (ko)
CN (1) CN104769268B (ko)
DE (1) DE102012220491A1 (ko)
WO (1) WO2014072097A1 (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3083829B1 (fr) * 2018-07-10 2021-01-08 Senior Flexonics Blois Sas Dispositif d'injection a rampe commune
GB2577072B (en) * 2018-09-12 2021-04-21 Delphi Automotive Systems Lux Pole piece retention and insertion method

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CH447714A (de) * 1967-03-22 1967-11-30 Huber Robert Sicherheitsvorrichtung an elektromagnetischen Einspritzventilen von Verbrennungsmotoren
US3625192A (en) * 1969-12-12 1971-12-07 Allis Chalmers Mfg Co Fuel injection nozzle with hydraulic valve-closing means
GB1347488A (en) * 1970-07-10 1974-02-27 Cav Ltd Liquid fuel injection pumping apparatus for an 'internal combustion engine
FR2145080A5 (ko) * 1971-07-08 1973-02-16 Peugeot & Renault
US3952711A (en) * 1975-03-04 1976-04-27 Ambac Industries, Inc. Diesel injection nozzle with independent opening and closing control
DE2759187A1 (de) * 1977-12-31 1979-07-12 Bosch Gmbh Robert Kraftstoffeinspritzanlage mit mindestens einem kraftstoffeinspritzventil, insbesondere fuer grossmotoren
JPS566031A (en) * 1979-06-25 1981-01-22 Ntn Toyo Bearing Co Ltd Fuel injection system
US4957085A (en) * 1989-02-16 1990-09-18 Anatoly Sverdlin Fuel injection system for internal combustion engines
JPH0533740A (ja) * 1991-07-26 1993-02-09 Aisan Ind Co Ltd 燃料圧力制御弁
JPH08312490A (ja) * 1995-05-11 1996-11-26 Keihin Seiki Mfg Co Ltd 電磁式燃料噴射弁
JP3831970B2 (ja) * 1996-03-14 2006-10-11 株式会社デンソー 内燃機関の燃料噴射装置
JP2001342930A (ja) * 2000-05-31 2001-12-14 Toyota Motor Corp 燃料噴射弁
EP1335125B1 (en) * 2000-11-17 2006-02-08 Isuzu Motors Limited Needle lift damper device of injector for fuel injection and needle lift damping method
DE10060811A1 (de) * 2000-12-07 2002-06-13 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen
JP2004027964A (ja) * 2002-06-25 2004-01-29 Aisin Seiki Co Ltd 車両用の燃料供給装置
JP2005307936A (ja) * 2004-04-26 2005-11-04 Isuzu Motors Ltd 膨張差吸収機構及びそれを備えた燃料噴射弁
DE102004048401A1 (de) * 2004-10-01 2006-04-06 Robert Bosch Gmbh Niederhalter für eine Brennstoffeinspritzvorrichtung und Brennstoffeinspritzvorrichtung
DE102005022672A1 (de) * 2005-05-17 2006-11-23 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005026992A1 (de) * 2005-06-10 2006-12-14 Robert Bosch Gmbh Hochdruckspeicherraum mit integriertem Drossel- und Filterelement
AT501573B1 (de) * 2006-06-13 2008-05-15 Avl List Gmbh Hydraulische vorrichtung mit zumindest einem druckspeicher
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Also Published As

Publication number Publication date
CN104769268A (zh) 2015-07-08
JP6077666B2 (ja) 2017-02-08
WO2014072097A1 (de) 2014-05-15
JP2015532394A (ja) 2015-11-09
US20150285199A1 (en) 2015-10-08
KR20150079683A (ko) 2015-07-08
DE102012220491A1 (de) 2014-05-15
CN104769268B (zh) 2018-07-31
EP2917556A1 (de) 2015-09-16

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