EP1454056B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1454056B1
EP1454056B1 EP02805246A EP02805246A EP1454056B1 EP 1454056 B1 EP1454056 B1 EP 1454056B1 EP 02805246 A EP02805246 A EP 02805246A EP 02805246 A EP02805246 A EP 02805246A EP 1454056 B1 EP1454056 B1 EP 1454056B1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
injection valve
needle
fuel
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
EP02805246A
Other languages
German (de)
English (en)
Other versions
EP1454056A1 (fr
Inventor
Fevzi Yildirim
Guenther Hohl
Michael Huebel
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 EP1454056A1 publication Critical patent/EP1454056A1/fr
Application granted granted Critical
Publication of EP1454056B1 publication Critical patent/EP1454056B1/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
    • 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
    • F02M2200/31—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 is based on a fuel injection valve according to the preamble of the main claim.
  • a Fuel injector known which one in one Nozzle body axially movable nozzle needle, which by a piezoelectric actuator is actuated and by a Compression spring is held in the closed position.
  • the Fuel is supplied from an external source with freely adjustable pressure.
  • the nozzle needle has a Central bore on, with the actuator, the nozzle needle concentrically surrounds and by means of sealing surfaces against the Fuel pressure is sealed.
  • a disadvantage of the known from DE 195 34 445 C2 Injection valve is in particular that the stroke of the actuator by the influence of the fuel pressure despite the Sealing surfaces can vary so much that a to Compensation of thermal changes in length provided Air gap between the actuator and the valve needle so big that the valve can not be opened.
  • EP 1 046 809 A2 discloses a fluid metering device with a metal bellows, which is hermetically sealed and generates only small axial pressure-related forces.
  • EP 1 111 230 A2 discloses a hydraulic Device for transmitting an actuator movement with a Metal bellows for sealing.
  • DE 100 07 733 A1 discloses an injection valve, at which between the actuator and the nozzle needle for Sealing of the under high pressure Fuel is arranged a metallic corrugated pipe.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the structural design the valve needle relief of the actuator Pressure equalization of the valve needle allowed.
  • the valve needle learns in the closed state of Fuel injection valve in the axial direction no Pressure force component. As a result, the actuator is relieved.
  • the freedom of the valve needle can thereby be brought about that the valve needle with a flexible seal communicates and the Joint with the flexible seal the same Radial distance from the central axis of the Fuel injection valve has as the sealing seat.
  • valve needle between the valve needle and a valve needle guide formed a throttle gap is, which intercepts the dynamic portion of the pressure.
  • pressure oscillations reach the corrugated tube seal no more.
  • annular Valve needle guide and the housing of the Fuel injection valve designed throttle point for, that pressure oscillations through the Fuel injection valve does not flow through the fuel can be transferred to the valve needle.
  • the inner diameter of the Valve needle guide the inner diameter of the sealing seat corresponds, so that the valve needle and with it in Active connection standing actuator body are guided axially and thereby offsets the valve needle and the Actuator be avoided.
  • a illustrated in Fig. 1 first embodiment of a Fuel injection valve 1 according to the invention is in shape a fuel injection valve 1 for Fuel injection systems of mixture compression, spark-ignited internal combustion engines running.
  • the Fuel injector 1 is particularly suitable for direct injection of fuel into one illustrated combustion chamber of an internal combustion engine.
  • the fuel injection valve 1 comprises a housing 2 in which an actuator 3 is arranged.
  • the actuator 3 consists for example, from several layers 4, consisting of a consist of piezoelectrically excitable material and For example, glued together.
  • the actuator 3 supports on the inlet side on a housing component 5 and downstream on an actuator head 6.
  • valve needle 10 Downstream of the actuator head 6 is a valve needle. 10 arranged downstream of the actuator head 6 . Between the actuator head 6 and the valve needle 10th If an air gap 11 is formed.
  • the valve needle 10th passes through the intermediate member 9, wherein the valve needle 10th with the intermediate component 9 via a flexible seal 12, preferably a flexible corrugated tube seal 12, against the the fuel injection valve 1 flowing through the fuel is sealed.
  • the corrugated tube seal 12 is connected to the Intermediate member 9 and the valve needle 10 respectively welded.
  • the housing 2 and the intermediate member 9 are sealed by a sealing ring 13 against each other.
  • the valve needle 10 passes through the example with a U-shaped cross-section provided intermediate member 9 so that a downstream leg 14 of the intermediate member 9 as Valve needle guide is used.
  • the valve needle 10 can for example, for the sake of better switching dynamics a Have recess 15.
  • valve needle 10 Downstream of the valve needle 10 is an actuating body 16, which at its downstream end a Valve-closing body 17 has.
  • the valve closing body 17 acts with a valve seat surface 28 to a sealing seat 25th together.
  • the valve seat surface 28 may in particular on a formed annular valve seat body 18 be executed, which is either integral with the housing 2 or is suitably associated with it.
  • a return spring 20 is arranged between the valve seat body 18 and a downstream end 19 the valve needle 10; which the fuel injection valve 1 in the non-energized State of the actuator 3 keeps closed.
  • the fuel injection valve 1 further comprises a Valve needle guide 21, which, for example, annular may be executed and their radial extent chosen is that between the annular valve needle guide 21 and the housing 2, a throttle body 22 is formed.
  • a Valve needle guide 21 which, for example, annular may be executed and their radial extent chosen is that between the annular valve needle guide 21 and the housing 2, a throttle body 22 is formed.
  • the fuel injector 1 flowing through Fuel. is about a not shown Fuel supply and fed via a fuel line 23, which extends for example in the housing 2, on the Actuator 3 passed.
  • Outflow side of the corrugated tube 12 is an inner space 24 of the fuel injection valve 1 completely filled with fuel.
  • This fuel is available under fuel pressure, the so-called system pressure.
  • the piezoelectric layers 4 expand, so that the actuator base 6 in the direction of the valve needle 10 in a discharge direction of the fuel moves.
  • the air gap 11 between the actuator base 6 and the valve needle 10 is closed by it.
  • the actuator 3 pushes the Valve needle 10 and thus also the actuator body 16 in Downstream of the fuel, so that at the Operating body 16 formed valve closing body 17 of the valve seat surface 28, which on the valve seat body 18th is formed lifts, the fuel injection valve. 1 is opened and fuel in the not further hosed shown combustion chamber of the internal combustion engine becomes.
  • valve needle 10th with the preferably designed as a corrugated tube seal 12 flexible seal 12 is connected to the same radial Distance from the central axis 27 of the Fuel injection valve 1 as the sealing seat 25, so will the valve needle 10 in the closed state by the Fuel pressure is not applied and is pressure-balanced.
  • the valve needle 10 thus even with closed air gap 11 no forces on the Transfer actuator 3.
  • the invention is not limited to that shown Embodiment limited and, for example, for Inwardly opening fuel injectors 1 or magnetostrictive actuators 3 applicable.

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 (9)

  1. Injecteur de carburant (1) pour injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne, comprenant un actionneur piézoélectrique ou magnétostrictif (3), une aiguille de soupape (10) qui peut être commandée par l'actionneur (3) et qui coopère avec un obturateur de soupape (17) formant avec un corps de siège de soupape (18) un siège d'étanchéité (25), ainsi qu'un ressort de rappel (20) qui actionne l'aiguille de soupape (10) dans le sens de fermeture, cette aiguille (10) à l'état fermé étant équilibrée en pression, la force qu'exerce la pression du carburant sur cette aiguille dans le sens d'ouverture étant à peu près égale à la force qu'exerce sur cette aiguille (10) la pression du carburant dans le sens de fermeture,
    caractérisé en ce qu'
    un guide d'aiguille de soupape (21) forme un point d'étranglement (22) avec un boítier (2) de l'injecteur (1).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'aiguille de soupape (10) est en liaison avec une étanchéité flexible (12), et la distance séparant ce point de liaison (26) et cette étanchéité flexible (12) est égale à la distance radiale séparant le siège d'étanchéité (25) de l'axe médian (27) de l'injecteur de carburant (1).
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    le diamètre interne du guide d'aiguille de soupape (21) est égal au diamètre interne du corps de siège de soupape (18).
  4. Injecteur de carburant selon une des revendications 1 à 3,
    caractérisé en ce que
    l'aiguille de soupape (10) traverse un composant intermédiaire (9) monté dans le boítier (2) de l'injecteur (1).
  5. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    le composant intermédiaire (9) est rendu étanche par rapport au boítier (2) de l'injecteur (1), par une bague d'étanchéité (13).
  6. Injecteur de carburant selon la revendication 4 ou 5,
    caractérisé en ce que
    l'aiguille de soupape (10) et le composant intermédiaire (9) sont rendus étanches par rapport au carburant qui traverse l'injecteur (1), par une étanchéité tubulaire ondulée (12).
  7. Injecteur de carburant selon la revendication 6,
    caractérisé en ce que
    l'étanchéité tubulaire ondulée (12) est soudée à l'aiguille de soupape (10) et au composant intermédiaire (9).
  8. Injecteur de carburant selon une des revendications 1 à 7,
    caractérisé en ce que
    l'actionneur (3) est mis en précontrainte par un ressort de précontrainte (7).
  9. Injecteur de carburant selon une des revendications 1 à 8,
    caractérisé en ce qu'
    entre le pied d'actionneur (6) et l'aiguille de soupape (10) se trouve une fente d'air (11).
EP02805246A 2001-12-05 2002-11-25 Soupape d'injection de carburant Expired - Lifetime EP1454056B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10159750A DE10159750A1 (de) 2001-12-05 2001-12-05 Brennstoffeinspritzventil
DE10159750 2001-12-05
PCT/DE2002/004317 WO2003054382A1 (fr) 2001-12-05 2002-11-25 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1454056A1 EP1454056A1 (fr) 2004-09-08
EP1454056B1 true EP1454056B1 (fr) 2005-10-12

Family

ID=7708138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02805246A Expired - Lifetime EP1454056B1 (fr) 2001-12-05 2002-11-25 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US6892956B2 (fr)
EP (1) EP1454056B1 (fr)
JP (1) JP4335685B2 (fr)
KR (1) KR100935810B1 (fr)
AT (1) ATE306614T1 (fr)
DE (2) DE10159750A1 (fr)
WO (1) WO2003054382A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10353641B4 (de) * 2003-11-17 2016-12-01 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004002299A1 (de) * 2004-01-16 2005-08-04 Robert Bosch Gmbh Kraftstoffinjektor mit direkt angesteuertem Einspritzventilglied
US7942349B1 (en) 2009-03-24 2011-05-17 Meyer Andrew E Fuel injector
WO2012158153A1 (fr) * 2011-05-13 2012-11-22 Meyer Andrew E Injecteur de carburant
DE102011087005A1 (de) * 2011-11-24 2013-05-29 Robert Bosch Gmbh Ventil zum Zumessen eines strömenden Mediums
CA2809249C (fr) * 2013-03-15 2014-03-11 Westport Power Inc. Appareil de commande de soulevement d'un element de soupape
EP2863048B1 (fr) * 2013-10-21 2017-12-06 C.R.F. Società Consortile Per Azioni Électro-injecteur à combustible pour système d'injection de carburant d'un moteur à combustion interne
JP2017066955A (ja) * 2015-09-30 2017-04-06 日立オートモティブシステムズ株式会社 流量制御弁
DE102018001048A1 (de) * 2018-02-09 2019-08-14 Atlas Copco Ias Gmbh Dosierventil

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003031799A1 (fr) * 2001-10-02 2003-04-17 Robert Bosch Gmbh Soupape d'injection de carburant
WO2003048559A1 (fr) * 2001-11-30 2003-06-12 Robert Bosch Gmbh Soupape d'injection de carburant

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19534445C2 (de) 1995-09-16 1998-07-30 Man Nutzfahrzeuge Ag Einspritzventil für Brennkraftmaschinen
EP1046809B1 (fr) 1999-04-20 2005-08-10 Siemens Aktiengesellschaft Dispositif de dosage d'un fluide
DE19962177A1 (de) * 1999-12-22 2001-07-12 Siemens Ag Hydraulische Vorrichtung zum Übertragen einer Aktorbewegung
DE10007733A1 (de) * 2000-02-19 2001-08-23 Daimler Chrysler Ag Einspritzventil
DE10007735A1 (de) * 2000-02-19 2001-09-06 Daimler Chrysler Ag Einspritzventil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003031799A1 (fr) * 2001-10-02 2003-04-17 Robert Bosch Gmbh Soupape d'injection de carburant
WO2003048559A1 (fr) * 2001-11-30 2003-06-12 Robert Bosch Gmbh Soupape d'injection de carburant

Also Published As

Publication number Publication date
ATE306614T1 (de) 2005-10-15
JP2005513336A (ja) 2005-05-12
DE10159750A1 (de) 2003-06-12
KR20040066857A (ko) 2004-07-27
US20040124274A1 (en) 2004-07-01
DE50204560D1 (de) 2006-02-23
KR100935810B1 (ko) 2010-01-08
US6892956B2 (en) 2005-05-17
JP4335685B2 (ja) 2009-09-30
WO2003054382A1 (fr) 2003-07-03
EP1454056A1 (fr) 2004-09-08

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