EP1115971B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1115971B1
EP1115971B1 EP99923386A EP99923386A EP1115971B1 EP 1115971 B1 EP1115971 B1 EP 1115971B1 EP 99923386 A EP99923386 A EP 99923386A EP 99923386 A EP99923386 A EP 99923386A EP 1115971 B1 EP1115971 B1 EP 1115971B1
Authority
EP
European Patent Office
Prior art keywords
actuator
valve
fuel injection
valve needle
injection valve
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
EP99923386A
Other languages
German (de)
English (en)
Other versions
EP1115971A1 (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 EP1115971A1 publication Critical patent/EP1115971A1/fr
Application granted granted Critical
Publication of EP1115971B1 publication Critical patent/EP1115971B1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/04—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation
    • F02M47/046—Fluid pressure acting on injection-valve in the period of injection to open it
    • 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
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic

Definitions

  • the invention is based on a fuel injector according to the preamble of claim 1.
  • the valve has one of the actuator valve closing body which can be actuated by means of a valve needle, the one with a valve seat surface to a sealing seat cooperates on.
  • the actuator is tubular and there is a between the actuator and the valve needle hydraulic transmission device intended.
  • the fuel injector also has one as an actuator on the translation device acting translation piston, the actuator Encloses the booster piston.
  • the fuel injector is as an inward opening fuel injector executed. How the Fuel injector is such that the Booster piston and the valve needle when the actuator is excited Always move in the same direction. If the actuator is excited, so the booster piston moves up, and in succession which lifts by the pressure drop in the hydraulic Translator chamber the valve needle in the same Direction of movement from the sealing seat.
  • a disadvantage of this known design is one Fuel injector with piezoelectric actuator that because of a relatively large volume and a relative large cross-sectional area actuator particularly compact design can be realized. Furthermore is disadvantageous that for the translation device special hydraulic medium is used that itself due to leakage loss over time can evaporate. This can be how the Transmission device and the service life of the fuel injector affect.
  • the fuel injector according to the invention with the Features of claim 1 has the advantage that due to the tubular actuator that the Valve needle or an actuating element for actuating the Valve needle encloses at least in sections, one particularly compact and inexpensive design is achieved.
  • the internal volume of the tubular, piezoelectric or magnetostrictive actuator can be used to hold components serve that in the known piezo actuator in the axial Extension of the piezo actuator.
  • the fuel injector according to the invention is particularly suitable for injecting petrol directly into the Combustion chamber of an internal combustion engine is suitable as there occurring fuel pressures in a range of about 100 are up to 200 bar and comparatively significantly lower are as with diesel injectors.
  • the translation piston can preferably on the Side facing away from the sealing seat have a flange which the actuator is supported on and with which the actuator is preferably glued.
  • the translation piston can be in the tubular actuator can be integrated, creating a compact design results.
  • the actuator is preferably pretensioned by a first bias spring and the reset of the Valve closing body and the valve needle by means of one of them independent return spring.
  • the Translation device a force redirection between the Translator piston and the valve needle.
  • the Translation device advantageously comprises the translation device a housing body with an inner recess, in which of the booster pistons is displaceable.
  • the Housing body is from the valve needle or one Coupling piece enclosed, being between the booster piston and the housing body an inner chamber and between the valve needle or the coupling piece and the Housing body are formed an outer chamber are communicating with each other. In this way is a particularly compact translation facility formed, which is particularly low in manufacturing costs can be made.
  • Fuel injector Preferably takes place as a hydraulic medium for the Translation device in the fuel injector guided and by the fuel injector fuel to be used.
  • Fuel injector no special hydraulic Medium, for example a hydraulic oil, that leak through leakage over time could. Rather, it becomes quasi-static through management columns Fuel as hydraulic medium automatically continuously refilled.
  • the fuel injector is suitable especially for direct fuel injection, especially of gasoline, preferably in the combustion chamber mixture-compressing, spark-ignited internal combustion engine.
  • the fuel injector 1 has a housing that from a first housing body 2 and a second Housing body 3 is made.
  • a valve closing body 4 is in the Embodiment in one piece with a valve needle 5 trained and acts with one on a valve seat support 6 trained valve seat 7 to a sealing seat together.
  • the valve seat support 6 is between one Clamping nut 8 and the second housing body 3 clamped.
  • the valve closing body 4 is by means of a return spring 9 biased against the valve seat surface 7.
  • the one to be sprayed by the fuel injector 1 Fuel flows in via a fuel inlet connection 11 and via one provided in the second housing body 3 Fuel line 12 and a subsequent, in the valve seat support 6 provided further fuel line 13 into a recess 14 of the valve seat carrier 6. From the Recess 14 the fuel continues to flow upstream of the valve closing body 4 provided swirl grooves 15, which serve to better distribute the fuel to which through the valve closing body 4 and the valve seat surface 7 formed sealing seat.
  • valve needle 5 and the Valve closing body 4 takes place via a piezoelectric Actuator 16, which is tubular.
  • a piezoelectric actuator 16 can in the same A magnetostrictive actuator can also be used.
  • the piezoelectric actuator 16 consists of a large number of stacked piezoelectric ceramic disks. These ceramic discs are each provided with electrodes and so by means of a connector 17 supplyable electrical voltage that can be applied the actuator 16 when actuated with the electrical voltage contracts.
  • the connector 17 can as Plastic injection molded part on the first housing body 2 molded and via a connecting line 20 with the Actuator 16 can be connected.
  • the actuator 16 is between the second housing body 2 and a flange 18, in Embodiment with the interposition of an intermediate washer 21 clamped and by means of a bias spring 22 biased.
  • the bias of the bias spring 22 is in Embodiment adjustable by means of an adjusting screw 23.
  • the actuator 16, the intermediate washer 21, the flange 18 and the bias spring 22 are within one Longitudinal bore 24 of the first housing body 2.
  • the actuator 16 is preferably with the second housing body 3 and Intermediate washer 21 glued.
  • the Translator piston 19 extends through an axial Longitudinal opening 26 of the tubular actuator 16 through and up to a translation device 27 extended.
  • the translation device 27 consists of a hydraulic chamber 28 which is filled with a hydraulic medium, in the embodiment with the over the fuel inlet nozzle 11 and the fuel lines 12, 13 supplied Fuel that is filled.
  • the translation piston 19 instructs its end projecting into the hydraulic chamber 28 an area A1, while the valve needle 5 at its in the hydraulic chamber 28 projecting end face a surface A2 has.
  • the area A2 of the valve needle 5 is smaller than that Area A1 of the booster piston 19.
  • the actuator 16 When the actuator 16 is actuated, it contracts and transmits this movement via the flange 18 to the Translator piston 19, the downward in Fig. 1 in the direction is moved to the valve closing body 4. That through in the hydraulic chamber 28 displaced volume of hydraulic medium causes a displacement of the Valve needle 5 also in Fig. 1 down towards the valve closing body 4. However, since the area A2 of the Valve needle 5 is smaller than the area A1 of the Booster piston 19, is on the valve needle 5th transferred stroke larger than that of the translator piston 19th exerted stroke. The valve closing body 4 lifts from the Valve seat surface 7 and releases the sealing seat, so that Fuel is sprayed.
  • the use of the fuel is particularly advantageous at the same time as a hydraulic medium for the translation device 27. This ensures that by possible leakage of hydraulic medium is continuously refilled.
  • the refill takes place quasi-statically via a Guide gap between the valve needle 5 and the second Housing body 3 from one in the recess 14 of the Valve seat support 16 formed fuel reservoir.
  • the leadership gap between the Valve needle 5 and the second housing body 3 so low is dimensioned that the hydraulic medium or Fuel when the fuel injector is actuated and the resulting pressurization of the hydraulic chamber 28 not or only negligibly this leadership gap escapes.
  • Fig. 2 shows a longitudinal section through a Embodiment of a fuel injector according to the invention 1, which is also preferably for direct Injecting fuel, especially gasoline, into the Combustion chamber of a mixture-compressing, spark-ignition internal combustion engine serves.
  • 3 shows section III in Fig. 2.
  • Fuel injector 1 by an outward opening Fuel injector 1 is in FIG. 2 shown fuel injector an inside opening fuel injector 1.
  • the valve closing body 4 is therefore related to that on the valve seat support 6 provided valve seat 7 arranged on the inside and forms a sealing seat with the valve seat 7, which in the closed position of the fuel injector 1 closes a spray opening 40.
  • the valve closing body 4 and the valve needle 5 formed in one piece therewith is biased by the return spring 9.
  • the Return spring 9 is in the embodiment between the second housing body 3 and one on a thickening 41 the valve needle 5 clamped flange 10.
  • tubular actuator 16 is also in the shown in Fig. 2 embodiment of the Translator piston 19 penetrated.
  • a third housing body 42 is via a thread 43 with the first housing body 2 screwed and thus rigidly fixed. Between the third Housing body 42 and the booster piston 19 is one Inner chamber 44 formed, the holes 45 with a Outer chamber 46 is connected. The outer chamber 46 is between a third housing body 42, with the valve needle 5 by means of a weld seam 47 connected coupling piece 48 and the third housing body 3 formed.
  • a refill space 49 serves for the translation device 27, the one over a longitudinal bore 50 and one over a transverse bore 51 connected to that in the fuel inlet connection 11 Recess 14 is connected and thus with fuel corresponding to that on the fuel inlet port 11 prevailing inlet pressure is filled.
  • the refill of the Outer chamber 46 and the inner chamber 44 of the translation device 27 takes place via a guide gap between the Coupling piece 48 and the third housing body 42 also quasi-static.
  • the invention is not based on the illustrated Embodiment limited and also with a variety other designs of fuel injection valves 1 can be realized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (5)

  1. Injecteur de carburant (1), en particulier injecteur pour installations d'injection de carburant de moteurs à combustion interne, comprenant un actionneur (16) piézoélectrique ou magnétostrictif et un corps de fermeture d'injecteur (4) qui peut être actionné par l'actionneur (16) au moyen d'une aiguille d'injecteur (5), et qui coopère avec une surface de siège de soupape (7) pour établir un appui étanche, l'actionneur (16) étant de forme tubulaire, avec un amplificateur (27) présentant un milieu hydraulique, prévu entre l'actionneur (16) et l'aiguille d'injecteur (5) et un piston amplificateur (19) qui agit en tant qu'élément d'actionnement sur l'amplificateur (27), l'actionneur (16) entourant le piston amplificateur (19), et l'injecteur de carburant (1) étant réalisé sous la forme d'un injecteur de carburant (1) s'ouvrant vers l'intérieur,
    caractérisé en ce que
    l'amplificateur (27) est configuré de manière qu'il se forme un renvoi de force entre le piston amplificateur (19) et l'aiguille d'injecteur (5), les directions de mouvement du piston amplificateur (19) et de l'aiguille d'injecteur (5) étant opposées pendant l'actionnement de l'actionneur (16).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'amplificateur (27) présente un corps d'enveloppe (42) muni d'un évidement intérieur dans lequel le piston amplificateur (19) peut coulisser, le corps d'enveloppe (42) étant entouré par l'aiguille d'injecteur (5) ou par un organe d'accouplement (48) relié à l'aiguille d'injecteur (5), et une chambre intérieure (44) est formée entre le piston amplificateur (19) et le corps d'enveloppe (42) tandis qu'une chambre extérieure (46) reliée à la chambre intérieure (44) est formée entre l'aiguille d'injecteur (5) ou l'organe d'accouplement (48) et le corps d'enveloppe(42).
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    le piston amplificateur (19) présente une collerette (18) à une extrémité qui est éloignée du siège de fermeture étanche, et sur laquelle l'actionneur (16) prend appui.
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce qu'
    une précontrainte de l'actionneur (16) est réalisée au moyen d'un ressort de précontrainte (22) qui agit sur la collerette (18) du piston amplificateur (19) et un rappel du corps de fermeture d'injecteur (4) est réalisé au moyen d'un ressort de rappel (9) qui agit sur l'aiguille d'injecteur (5).
  5. Injecteur de carburant selon une des revendications 1 à 4,
    caractérisé en ce que
    le milieu hydraulique de l'amplificateur (27) est du carburant amené dans l'injecteur de carburant (1).
EP99923386A 1998-09-23 1999-03-24 Soupape d'injection de carburant Expired - Lifetime EP1115971B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19843535A DE19843535A1 (de) 1998-09-23 1998-09-23 Brennstoffeinspritzventil
DE19843535 1998-09-23
PCT/DE1999/000864 WO2000017509A1 (fr) 1998-09-23 1999-03-24 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1115971A1 EP1115971A1 (fr) 2001-07-18
EP1115971B1 true EP1115971B1 (fr) 2004-08-11

Family

ID=7881906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99923386A Expired - Lifetime EP1115971B1 (fr) 1998-09-23 1999-03-24 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6561436B1 (fr)
EP (1) EP1115971B1 (fr)
JP (1) JP4309589B2 (fr)
AT (1) ATE273448T1 (fr)
DE (2) DE19843535A1 (fr)
WO (1) WO2000017509A1 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4079578B2 (ja) * 2000-06-22 2008-04-23 株式会社日本自動車部品総合研究所 燃料噴射装置
DE10039218A1 (de) * 2000-08-11 2002-02-28 Bosch Gmbh Robert Piezoelektrische Aktuatoranordnung, inbesondere zur Betätigung eines Ventils in einem Kraftfahrzeug
JP2002119075A (ja) * 2000-10-03 2002-04-19 Matsushita Electric Ind Co Ltd アクチュエータ装置
DE10137210B4 (de) * 2001-07-30 2011-04-07 Robert Bosch Gmbh Brennstoffeinspritzventil
ATE308119T1 (de) * 2002-02-01 2005-11-15 Siemens Ag Verfahren zum vorbehandeln einer piezoelektrischen keramik und verfahren zum justieren eines einspritzventils
US7118783B2 (en) * 2002-06-26 2006-10-10 Micron Technology, Inc. Methods and apparatus for vapor processing of micro-device workpieces
DE10310790A1 (de) * 2003-03-12 2004-09-23 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004005452B4 (de) * 2004-02-04 2014-01-09 Robert Bosch Gmbh Düsenhalterkombination mit direktgesteuertem Einspritzventilglied
EP1574705B1 (fr) * 2004-02-27 2006-12-27 Siemens VDO Automotive S.p.A. Soupape d'injection de fluide
EP1568881B1 (fr) * 2004-02-27 2010-12-08 Continental Automotive Italy S.p.A. Injecteur de fluide
DE102004027824A1 (de) * 2004-06-08 2006-01-05 Robert Bosch Gmbh Kraftstoffinjektor mit variabler Aktorübersetzung
DE102004028522A1 (de) * 2004-06-11 2005-12-29 Robert Bosch Gmbh Kraftstoffinjektor mit variabler Aktorhubübersetzung
DE102004028885A1 (de) * 2004-06-15 2006-01-05 Robert Bosch Gmbh Kraftstoffeinspritzventil
DE102004044461A1 (de) * 2004-09-15 2006-03-30 Robert Bosch Gmbh Einspritzdüse
DE102005012929A1 (de) * 2005-03-21 2006-09-28 Robert Bosch Gmbh Kraftstoffinjektor mit direkter Steuerung des Einspritzventilglieds und variabler Übersetzung
JP4412241B2 (ja) * 2005-06-15 2010-02-10 株式会社デンソー 燃料噴射弁
EP1837518B1 (fr) * 2006-03-20 2011-05-25 Delphi Technologies Holding S.à.r.l. Dispositif d'amortissement pour un injecteur de carburant
US7717132B2 (en) * 2006-07-17 2010-05-18 Ford Global Technologies, Llc Hydraulic valve actuated by piezoelectric effect
JP4529971B2 (ja) * 2006-12-21 2010-08-25 株式会社デンソー 燃料噴射弁
DE602007005934D1 (de) * 2007-04-30 2010-05-27 Magneti Marelli Spa Kraftstoffeinspritzventil mit sich nach außen öffnendem Ventil
US8459577B2 (en) * 2008-07-08 2013-06-11 Caterpillar Inc. Decoupled valve assembly and fuel injector using same
US8464750B1 (en) 2010-06-30 2013-06-18 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Magnetostrictive pressure regulating system
KR101386671B1 (ko) * 2012-11-29 2014-04-21 인지컨트롤스 주식회사 피에조밸브 및 이를 위한 제조방법

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DE4306072C2 (de) * 1993-02-26 1994-12-08 Siemens Ag Vorrichtung zum Öffnen und Verschließen einer in einem Gehäuse vorhandenen Durchtrittsöffnung
DE4306073C1 (de) 1993-02-26 1994-06-01 Siemens Ag Zumeßvorrichtung für Fluide
US5482213A (en) * 1993-05-31 1996-01-09 Aisin Seiki Kabushiki Kaisha Fuel injection valve operated by expansion and contraction of piezoelectric element
DE4332124A1 (de) * 1993-09-22 1995-03-23 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen
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Also Published As

Publication number Publication date
EP1115971A1 (fr) 2001-07-18
DE59910221D1 (de) 2004-09-16
JP4309589B2 (ja) 2009-08-05
WO2000017509A1 (fr) 2000-03-30
DE19843535A1 (de) 2000-03-30
ATE273448T1 (de) 2004-08-15
US6561436B1 (en) 2003-05-13
JP2002525486A (ja) 2002-08-13

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