EP1456526B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1456526B1
EP1456526B1 EP02787392A EP02787392A EP1456526B1 EP 1456526 B1 EP1456526 B1 EP 1456526B1 EP 02787392 A EP02787392 A EP 02787392A EP 02787392 A EP02787392 A EP 02787392A EP 1456526 B1 EP1456526 B1 EP 1456526B1
Authority
EP
European Patent Office
Prior art keywords
injection valve
fuel injection
actuator
seal
valve according
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
EP02787392A
Other languages
German (de)
English (en)
Other versions
EP1456526A1 (fr
Inventor
Guenther Hohl
Michael Huebel
Juergen Stein
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 EP1456526A1 publication Critical patent/EP1456526A1/fr
Application granted granted Critical
Publication of EP1456526B1 publication Critical patent/EP1456526B1/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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • 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
    • F02M2200/707—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for avoiding fuel contact with actuators, e.g. isolating actuators by using bellows or diaphragms
    • 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

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • a hydraulic coupler for a piezoelectric actuator known in which the actuator transmits a lifting force to a master piston.
  • the Master piston is with a guide cylinder for one Slave piston frictionally connected.
  • the slave piston, the mecanicszylinder- and the guide cylinder final Master piston form a hydraulic chamber.
  • a spring which is the Press the master piston and the slave piston apart.
  • a rubber sleeve arranged through the a reservoir for a viscous hydraulic fluid opposite a fuel space is sealed.
  • the viscosity of the Hydraulic fluid is the annular gap between the slave piston and Adapted guide cylinder.
  • the slave piston mechanically transfers a lifting movement for example, a valve needle. If the actor on the Master piston and the guide cylinder a lifting movement transmits, this lifting movement is due to the pressure of Hydraulic fluid in the hydraulic chamber on the slave piston transferred because the hydraulic fluid in the hydraulic chamber can not be compressed and only a small proportion of the hydraulic fluid through the annular gap during the short Period of a stroke in through the rubber cuff formed storage room can escape.
  • the actuator exerts no pressure force on the master piston, is made by the spring of the slave piston from the Guide cylinder pushed out and through the resulting Underpressure penetrates through the annular gap, the hydraulic fluid in enter the hydraulic room and refills it again. Thereby the coupler automatically adjusts to length expansions and pressure related strains of a fuel injector one.
  • a disadvantage of the known prior art is that the Sealing by a rubber boot, usually by two clamping rings against the end section of the Guide cylinder and the slave piston is pressed on Duration is only incomplete.
  • the high viscosity hydraulic fluid and the fuel can mix and it can a failure of the coupler come. If fuel, gasoline, for example, enters the interior of the coupler, this can lead to a malfunction, because of the low viscosity of gasoline this fluid too fast can pass through the annular gap and in time of the stroke can build up no pressure in the pressure chamber.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the opposite advantage that the pressure chamber is sealed by a seal on both the master piston and the slave piston against an actuator chamber and a fuel chamber.
  • This arrangement has the advantage of completely sealing the coupler against penetrating fuel.
  • the advantage here is in particular a simple Construction, which without the use of springs for Actuation of the encoder and slave pistons of the coupler gets along.
  • the seals are corrugated shaped and Therefore take over in addition to their sealing function and the Return of the pistons.
  • the coupler is in a two-part Enclosed coupler housing, whereby the inflow side Corrugated pipe seal is not pressurized with fuel pressure becomes.
  • This allows the material of the seal to be made thinner so that sufficient elasticity to compensate the hydraulic medium is guaranteed.
  • the coupler housing also allows easy pre-assembly.
  • an actuator spring in the form of a Be arranged coil spring which biases the actuator.
  • Fig. 1 shows a schematic section of a Fuel injection valve 1, wherein the area of a hydraulic coupler 2 is shown.
  • the Fuel injection valve 1 is in particular for direct Injecting fuel into a combustion chamber of a mixture-compacting, spark-ignited internal combustion engine suitable.
  • the coupler 2 comprises a master piston 3, on which an actuating body 4 is supported.
  • the operating body 4 is widened on the inflow side to an actuator base 5, at which is a piezoelectric or magnetostrictive actuator 6 is applied.
  • the actuator 6 may consist of several piezoelectric or magnetostrictive layers 7 be constructed.
  • a slave piston. 8 Downstream of the master piston 3 is a slave piston. 8 arranged.
  • the slave piston 8 and the master piston 3 are in a two-part coupler housing 9 encapsulated.
  • a first Part 10 and a second part 11 of the coupler housing 9 are thereby connected to each other, for example, welded.
  • the Master piston 3 is connected via a first seal 12, the corrugated pipe-shaped and with the master piston. 3 is welded to the second part 11 of the coupler housing 9 also connected by welding and seals the Coupler housing 9 against an actuator chamber 21 from, in which the Actuator 6 is arranged.
  • a second seal 13, which downstream of the second part 11 of the coupler housing. 9 arranged and welded to this is also corrugated pipe-shaped and with the slave piston. 8 connected.
  • the second seal 13 seals the coupler housing 9 against a fuel space fueled me 17 off.
  • the master piston 3 und.der slave piston 8 can thereby different diameters or different effective Have end faces, so that a translation of Aktorhubs up to a ratio of 3: 1 is possible.
  • a pressure chamber 14 is through the seals 12 and 13, the second part 11 of the Koppiergeophuses 9 and the slave piston. 8 limited.
  • the pressure chamber 14 is preferably one filled with high viscosity hydraulic medium.
  • a high viscosity Hydraulic medium has u. a the advantage that the requirements to the accuracy of the piston guide are less than a low-viscosity medium. In addition-by the smaller one can Vapor pressure the Kavitationsne Trent be reduced.
  • a Compensation bore 15 is formed, which the hydraulic medium the unimpeded flow around the coupler 2 at slow Movements of the master piston 3, for example by Temperature influences allows.
  • the hydraulic medium can filled via a filling valve 16 in the pressure chamber 14 become.
  • an actuator spring 18 is clamped, which as Coil spring is executed and the actuator 6 with a Bias applied.
  • the master piston 3 and the second part 11 of the coupler housing 9 is Ensure that the first seal does not interfere with the pressure of the fuel injection valve 1 flowing through Fuel is applied.
  • the actuator 6 via a not shown electrical line an electrical excitation voltage supplied, the layers 7 of the actuator 6 expand, whereby the actuator foot 5 is pressed quickly in the outflow direction becomes.
  • the fast movement is via the actuator body 4 transmitted to the master piston 3. That in one Coupler gap 19 located hydraulic medium transmits the Movement on the slave piston 8, wherein over annular gaps 20th Hydraulic medium is displaced.
  • the slave piston 8 has a smaller effective area than the master piston 3, so that the small stroke of the actuator 6 in a larger travel For example, a valve needle, which with the Slave piston 8 can be in operative connection, translated becomes. If the voltage exciting the actuator 6 is switched off, pulls the actuator 6 together, causing the master piston. 3 is relieved.
  • the invention is not limited to that shown Embodiment limited and, for example, for Fuel injection valves 1 for mixture compaction self-igniting internal combustion engines suitable.

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 (10)

  1. Injecteur de carburant (1) pour l'injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne, comprenant un actionneur piézo-électrique ou magnétostrictif (6) et un coupleur hydraulique (2) qui présente un piston émetteur (3) ainsi qu'un piston récepteur (8) reliés à une chambre de pression (14), cette chambre de pression (14) remplie d'un fluide hydraulique étant étanche, par une première étanchéité (12) vis-à-vis d'une chambre d'actionneur (21) dans laquelle se trouve l'actionneur (6) et, par une seconde étanchéité (13), d'une chambre de carburant (17) dans laquelle se trouve du carburant,
    caractérisé en ce que
    le coupleur (2) est encapsulé dans un boítier de coupleur (9) en deux parties disposé à l'intérieur de l'injecteur de carburant (1).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la première étanchéité (12) et la seconde étanchéité (13) sont des garnitures d'étanchéité en tube annelé.
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    la première étanchéité (12) sert de ressort de rappel pour le piston émetteur (3).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    la première étanchéité (I2) est soudée au piston émetteur (3).
  5. Injecteur de carburant selon une des revendications 1 à 4,
    caractérisé en ce que
    la seconde étanchéité (13) sert de ressort de rappel pour le piston récepteur (8).
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    la seconde étanchéité (13) est soudée au piston récepteur (8).
  7. Injecteur de carburant selon une des revendications précédentes,
    caractérisé en ce qu'
    une première partie (10) du boítier de coupleur (9) est soudée à une seconde partie (11) du boítier de coupleur (9).
  8. Injecteur de carburant selon une des revendications précédentes,
    caractérisé en ce que
    dans la chambre d'actionneur (21) est disposé, entre le boítier de coupleur (9) et un pied d'actionneur (5), un ressort d'actionneur (18) qui exerce une force de précontrainte sur l'actionneur (6).
  9. Injecteur de carburant selon la revendication 8
    caractérisé en ce que
    le ressort d'actionneur (18) est un ressort hélicoïdal.
  10. Injecteur de carburant selon une des revendications 1 à 9,
    caractérisé en ce que
    la chambre de pression (14) est remplie d'une huile de silicone en tant que fluide hydraulique.
EP02787392A 2001-12-05 2002-11-25 Soupape d'injection de carburant Expired - Lifetime EP1456526B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10159749A DE10159749A1 (de) 2001-12-05 2001-12-05 Brennstoffeinspritzventil
DE10159749 2001-12-05
PCT/DE2002/004312 WO2003054377A1 (fr) 2001-12-05 2002-11-25 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1456526A1 EP1456526A1 (fr) 2004-09-15
EP1456526B1 true EP1456526B1 (fr) 2005-09-14

Family

ID=7708137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02787392A Expired - Lifetime EP1456526B1 (fr) 2001-12-05 2002-11-25 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US7040550B2 (fr)
EP (1) EP1456526B1 (fr)
JP (1) JP2005513334A (fr)
DE (2) DE10159749A1 (fr)
WO (1) WO2003054377A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10328573A1 (de) * 2003-06-25 2005-01-13 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10342772A1 (de) * 2003-09-16 2005-04-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10344880A1 (de) * 2003-09-26 2005-04-14 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10357454A1 (de) * 2003-12-03 2005-07-07 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10357189A1 (de) * 2003-12-08 2005-07-07 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004024119B4 (de) * 2004-05-14 2006-04-20 Siemens Ag Düsenbaugruppe und Einspritzventil
DE102004031790A1 (de) 2004-07-01 2006-01-26 Robert Bosch Gmbh Common-Rail-Injektor
DE102007002402B4 (de) * 2006-12-13 2014-12-31 Siemens Aktiengesellschaft Gaseinblasvorrichtung für einen Verbrennungsmotor
JP5262764B2 (ja) * 2009-01-29 2013-08-14 株式会社デンソー インジェクタ
DE102010027278B4 (de) * 2010-07-15 2020-07-02 Metismotion Gmbh Thermisch volumenneutraler Hubübertrager sowie Dosierventil mit einem solchen Hubübertrager und Verwendung des Dosierventils
DE102012204216A1 (de) * 2012-03-16 2013-09-19 Robert Bosch Gmbh Baugruppe

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60139981A (ja) * 1983-12-27 1985-07-24 Saginomiya Seisakusho Inc 圧電素子を利用した弁
JPH0519575Y2 (fr) * 1986-02-27 1993-05-24
JPS63158301A (ja) * 1986-07-31 1988-07-01 Toyota Motor Corp 圧電アクチユエ−タ
JPS6421263U (fr) * 1987-07-28 1989-02-02
JPH01144690A (ja) * 1987-11-30 1989-06-06 Ohkura Electric Co Ltd 積層圧電アクチュエータ
ATE192263T1 (de) 1990-09-25 2000-05-15 Siemens Ag Anordnung für einen in hubrichtung wirkenden adaptiven, mechanischen toleranzausgleich für den wegtransformator eines piezoelektrischen aktors
JPH07167327A (ja) * 1993-12-17 1995-07-04 Tdk Corp アクチュエータの変位拡大機構
US5884695A (en) * 1996-04-30 1999-03-23 American Magotteaux Corporation Boiler tube shield
DE29708546U1 (de) * 1997-05-14 1998-09-10 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Elektrischer Festkörperaktuator mit hydraulischer Übersetzung
DE19743640A1 (de) * 1997-10-02 1999-04-08 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
EP1046809B1 (fr) 1999-04-20 2005-08-10 Siemens Aktiengesellschaft Dispositif de dosage d'un fluide
DE19940056A1 (de) 1999-08-24 2001-03-22 Siemens Ag Dosiervorrichtung und Verfahren zur Dosierung
DE19950760A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19954537A1 (de) * 1999-11-12 2001-05-17 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19958704C2 (de) * 1999-12-06 2002-10-02 Siemens Ag Vorrichtung zum Übertragen einer Aktorbewegung und Fluiddosierer mit einer solchen Vorrichtung
DE19963568A1 (de) * 1999-12-29 2001-07-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19962177A1 (de) * 1999-12-22 2001-07-12 Siemens Ag Hydraulische Vorrichtung zum Übertragen einer Aktorbewegung
US6766965B2 (en) * 2001-08-31 2004-07-27 Siemens Automotive Corporation Twin tube hydraulic compensator for a fuel injector

Also Published As

Publication number Publication date
JP2005513334A (ja) 2005-05-12
WO2003054377A1 (fr) 2003-07-03
US20040118950A1 (en) 2004-06-24
DE50204297D1 (de) 2005-10-20
EP1456526A1 (fr) 2004-09-15
DE10159749A1 (de) 2003-06-12
US7040550B2 (en) 2006-05-09

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