EP1450034B1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP1450034B1
EP1450034B1 EP03025329A EP03025329A EP1450034B1 EP 1450034 B1 EP1450034 B1 EP 1450034B1 EP 03025329 A EP03025329 A EP 03025329A EP 03025329 A EP03025329 A EP 03025329A EP 1450034 B1 EP1450034 B1 EP 1450034B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
valve according
coupler
hydraulic
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
EP03025329A
Other languages
German (de)
English (en)
Other versions
EP1450034A1 (fr
Inventor
Martin Maier
Guenther Hohl
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 EP1450034A1 publication Critical patent/EP1450034A1/fr
Application granted granted Critical
Publication of EP1450034B1 publication Critical patent/EP1450034B1/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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M61/04—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
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9084—Rheological fluids
    • 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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a Fluiddosiervorraum known, which comprises a housing substantially, a therein under fluid pressure chamber and a valve needle passed through the valve, wherein a first end of the valve needle outside of the chamber is acted upon by a hub and the second end with a valve seat positioned on the housing forms a valve associated with the chamber.
  • a lead-through element for the valve needle at the first end of a metal bellows is used, which hermetically seals and generates only small axial pressure-related forces.
  • the DE 197 08 304 A1 discloses a device for transmitting a movement for an injection valve, wherein between a piezoelectric actuator and a drive piston, a transmission module is arranged, which has at least one pressure chamber which is closed via a first membrane. The pressure chamber is connected via a throttle with a compensation chamber, which is also arranged in the transmission module.
  • the DE 43 06 072 A1 discloses a fuel injector having a piezoelectric actuator arranged in a housing, a stroke transformer consisting of a pressure and reciprocating piston, a valve stem connected to the piston and a closing spring which presses the valve disk in the resting state onto the valve seal.
  • the compensation chamber connected to the hydraulic chamber via an annular gap existing between the piston and the housing is filled with a medium under overpressure. Since a diaphragm transfers the overpressure built up in the compensation chamber to the hydraulic fluid, there can be no gas bubbles which reduce the operating frequency of the valve.
  • the DE 100 44 120 A1 discloses a common rail system including a valve for actuating a fluid having an actuator unit for actuating an axially displaceable valve member associated with a valve closure member which cooperates with a valve seat to open and close the valve and which defines a high pressure area separates the valve.
  • a high pressure area is the fluid to be controlled Under a working pressure and possibly occurring overpressure is registered by the fact that the actuator unit is designed as a force measuring sensor.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that the hydraulic coupler remains functional even at low fuel pressures, resulting in the use of a special hydraulic fluid such.
  • a special hydraulic fluid such as silicone oil, and a suitable design of the coupler with a different positions engaging membrane is made possible.
  • the membrane can be folded back and forth between two positions so as to be able to produce a maximum or minimum volume of the compensation chamber depending on the operating state of the fuel injection valve.
  • coupler space can optionally be filled with a rheological fluid.
  • Fig. 1 shows in a highly schematic view a section through a first embodiment of an inventively designed fuel injector 1.
  • the fuel injector 1 is particularly suitable for direct injection of fuel into the combustion chamber of a mixture-compressing, spark-ignited internal combustion engine.
  • the fuel injection valve 1 comprises a piezoelectric or magnetostrictive actuator 2, which is encapsulated in a sleeve 3 and biased by a biasing spring 4.
  • An actuator cartridge 5 contains in addition to the actuator 2 and the biasing spring 4 on the upstream side of the actuator 2, a coupler 6 and downstream an actuator 7.
  • the actuator cartridge 5 is sealed by a corrugated pipe 8 against a fuel-carrying interior 9.
  • the coupler element 6 comprises a coupler space 10, which is filled, for example, with silicone oil.
  • the coupler space 10 is also sealed by a corrugated tube seal 11.
  • the corrugated tube is radially stiff. Filled, it can therefore support axial forces.
  • a coupler spring 12 is arranged in the coupler space, which ensures that a coupler foot 13 is always held in contact with the actuator 2.
  • a coupler head 14 is supported on a shoulder 15 on the actuator cartridge 5.
  • a pin 17 is arranged, which is positively connected to the actuator base 13 and is guided in the recess 16.
  • an annular gap 18 is formed, which allows the transition of hydraulic fluid in a compensation chamber 19. As a result, slow volume changes due to thermal processes in the coupler 6 are possible.
  • the compensation chamber 19 is closed by a membrane 20.
  • the diaphragm 20 is shown in a first position which defines a maximum compensation space 19.
  • Fig. 1B represents the membrane 20 in a second position, which defines a minimum compensation space 19.
  • intermediate positions are possible.
  • the folding of the diaphragm 20 from the second to the first position is achieved by the displacement of the hydraulic medium in the compensating volume 19, while the folding back into the starting position, for example by a only in Fig. 1B shown return spring 21 can be adopted.
  • the two positions of the membrane 20 can ensure that temperature changes of the actuator 2 are compensated.
  • the inventively designed fuel injector 1 further comprises an electrical line 22 for contacting the actuator 2 and a housing 23, in which the coupler 6 and a valve group 24 is arranged are.
  • the valve group 24 includes a support member 25 which is in operative connection with a valve needle 26.
  • a valve closing body 27 is formed, which forms a sealing seat with a arranged on the housing 23 valve seat surface 28.
  • a return spring 29 is clamped between the support member 25 and the housing 23.
  • a seal 30 seals the fuel injection valve 1 against a cylinder head, not shown, of the internal combustion engine.
  • the coupler space 10 in Fig. 1A and 1B is filled with any hydraulic fluid, which only meets the requirement not to evaporate at rapid pressure relief
  • the coupler space 10 in the in Fig. 2 shown second embodiment of an inventively designed fuel injection valve 1 filled with a rheological fluid.
  • a rheological fluid behaves at slow, so z. B. thermal length changes such as a liquid at rapid changes in length of the actuator 2, ie z. B. when excited the same as a solid.
  • the compensation of the rheological fluid via the recess 16 reacts both slowly enough with thermal change in length as well as sufficiently stiff when the actuator is energized.

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 (12)

  1. Injecteur de carburant (1) pour l'injection directe de carburant dans une chambre de combustion d'un moteur à combustion interne comportant un actionneur (2) excité, une aiguille d'injecteur (26) coopérant avec l'actionneur (2) et qui, en position de fermeture, forme un siège d'étanchéité avec une surface de siège de soupape sous l'action d'un ressort de rappel (29) pour actionner l'organe de fermeture de soupape (27) ainsi qu'un coupleur hydraulique (6), ayant un pied de coupleur et une tête de coupleur (14), entourant un volume hydraulique (10) et une chambre de compensation (19), cette dernière étant de volume variable par une membrane (20),
    caractérisé en ce que
    le pied de coupleur (13) comporte une broche (17) et
    la broche (17) passe dans une cavité (16) de la tête de coupleur (14).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la membrane (20) peut être rabattue entre une première position et une seconde position.
  3. Injecteur selon la revendication 2,
    caractérisé en ce que
    la première position de la membrane (20) correspond à une chambre de compensation maximale (19).
  4. Injecteur selon la revendication 2 ou 3,
    caractérisé en ce que
    la seconde position de la membrane (20) correspond à une chambre de compensation minimale (19).
  5. Injecteur selon l'une des revendications 2 à 4,
    caractérisé en ce que
    la membrane (20) peut être rabattue entre une première et une seconde position par le milieu hydraulique contenu dans le volume hydraulique (10) et elle est réglable en continu entre ces deux positions.
  6. Injecteur selon la revendication 5,
    caractérisé en ce que
    le milieu hydraulique est de l'huile de silicone.
  7. Injecteur selon la revendication 1,
    caractérisé en ce que
    la broche (17) est guidée dans la cavité (16) en formant un intervalle annulaire (18).
  8. Injecteur selon l'une des revendications 1 à 7,
    caractérisé en ce que
    le pied de coupleur (13) et la tête de coupleur (14) sont écartés par un ressort (12).
  9. Injecteur selon l'une des revendications 1 à 8,
    caractérisé en ce que
    le volume hydraulique (10) est fermé de manière étanche par un joint à tube ondulé (11).
  10. Injecteur selon l'une des caractéristiques 1 à 9,
    caractérisé en ce que
    le pied de coupleur (13) comporte un perçage (31) pour le remplissage du volume hydraulique (10).
  11. Injecteur selon la revendication 10,
    caractérisé en ce qu'
    après remplissage du volume hydraulique (10), le perçage (31) se ferme de préférence par une bille (32) enfoncée.
  12. Injecteur selon l'une des revendications 1 à 11,
    caractérisé en ce que
    le volume hydraulique (10) est un liquide rhéologique.
EP03025329A 2003-02-24 2003-11-04 Injecteur de carburant Expired - Lifetime EP1450034B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10307816 2003-02-24
DE10307816A DE10307816A1 (de) 2003-02-24 2003-02-24 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1450034A1 EP1450034A1 (fr) 2004-08-25
EP1450034B1 true EP1450034B1 (fr) 2008-04-09

Family

ID=32731122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03025329A Expired - Lifetime EP1450034B1 (fr) 2003-02-24 2003-11-04 Injecteur de carburant

Country Status (3)

Country Link
EP (1) EP1450034B1 (fr)
AT (1) ATE391850T1 (fr)
DE (2) DE10307816A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2141347A1 (fr) * 2008-07-03 2010-01-06 Continental Automotive GmbH Agencement de compensation thermique

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306072C2 (de) * 1993-02-26 1994-12-08 Siemens Ag Vorrichtung zum Öffnen und Verschließen einer in einem Gehäuse vorhandenen Durchtrittsöffnung
DE19708304C2 (de) * 1997-02-28 1999-09-30 Siemens Ag Vorrichtung zur Übertragung einer Bewegung und Einspritzventil mit einer Vorrichtung zur Übertragung einer Bewegung
DE19744235A1 (de) * 1997-10-07 1999-04-08 Fev Motorentech Gmbh & Co Kg Einspritzdüse mit piezoelektrischem Aktuator
DE19919313B4 (de) * 1999-04-28 2013-12-12 Robert Bosch Gmbh Brennstoffeinspritzventil
DE19940056A1 (de) * 1999-08-24 2001-03-22 Siemens Ag Dosiervorrichtung und Verfahren zur Dosierung
DE19940054C2 (de) * 1999-08-24 2003-11-27 Siemens Ag Dosierventil für ein unter Druck stehendes Fluid
DE10044120A1 (de) * 2000-09-07 2002-04-04 Bosch Gmbh Robert Common-Rail-System
EP1325225B1 (fr) * 2000-10-11 2007-08-08 Siemens VDO Automotive Corporation Ensemble compensateur pour injecteur de carburant
DE10140799A1 (de) * 2001-08-20 2003-03-06 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10230089A1 (de) * 2002-07-04 2004-01-15 Robert Bosch Gmbh Brennstoffeinspritzventil

Also Published As

Publication number Publication date
EP1450034A1 (fr) 2004-08-25
ATE391850T1 (de) 2008-04-15
DE50309573D1 (de) 2008-05-21
DE10307816A1 (de) 2004-09-02

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