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EP1606509B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1606509B1
EP1606509B1 EP04704537A EP04704537A EP1606509B1 EP 1606509 B1 EP1606509 B1 EP 1606509B1 EP 04704537 A EP04704537 A EP 04704537A EP 04704537 A EP04704537 A EP 04704537A EP 1606509 B1 EP1606509 B1 EP 1606509B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
actuator
injection valve
valve according
hydraulic coupler
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
EP04704537A
Other languages
German (de)
English (en)
Other versions
EP1606509A1 (fr
Inventor
Hubert Stier
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 EP1606509A1 publication Critical patent/EP1606509A1/fr
Application granted granted Critical
Publication of EP1606509B1 publication Critical patent/EP1606509B1/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
    • F02M61/16—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
    • 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
    • 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
    • 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 relates to a fuel injection valve according to the preamble of the main claim, as from the document DE 101 33 265 A known.
  • a metering valve for metering of liquids or gases in particular an injection valve for fuel injection systems in internal combustion engines, which has a piezo stack actuator, the change in length is transmitted upon application of an excitation voltage to a metering opening controlling valve needle and determines the stroke of the valve needle.
  • the substance to be metered is supplied via a supply line, which is designed in the form of a deep hole in the valve body.
  • a disadvantage of the from the DE 35 33 085 A1 known metering valve is the floating bearing of the hydraulic coupler between fuel inlet and actuator, whereby the coupler is exposed to fluctuations in the fuel pressure.
  • the need for contacting the actuator electrical lines must be laid consuming, so as not to be claimed by the changes in position on train.
  • the cables must be routed around the coupler, making them both longer and more installation space claim.
  • the valve housing is thus voluminous and in turn requires a larger installation space in the cylinder head.
  • the hydraulic coupler is fixedly arranged between the actuator and a valve group, so that the electrical contact of the actuator does not have to take place on the actuator and account for changes in length caused by changes in position of the coupler.
  • the fuel injection valve should be further developed.
  • the fuel injection valve according to the invention has the features of the main claim.
  • the actuator is fixedly connected to the valve housing, whereby a stationary relative position of the actuator is achieved with respect to the housing.
  • Another advantage is that the electrical wires pass through holes in an actuator base and are fixed and protected by a plastic extrusion.
  • the plug in which the electrical lines are arranged, integrally formed on the plastic extrusion.
  • the coupler acts advantageously on a dome on the valve needle, so that offsets can be compensated.
  • a fuel injector 1 shown in Figs. 1 and 2 in two mutually perpendicular sectional views along a longitudinal axis is embodied in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression, spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 comprises a housing 2 in which one provided with an Aktorumspritzung 3 piezoelectric or magnetostrictive actuator 4 is arranged.
  • the actuator 4 is biased by a tube spring 5 to allow a non-destructive installation and a reproducible operation of the actuator 4.
  • the actuator 4 can be supplied by means of an electrical line 6, an electrical voltage.
  • the actuator 4 is supported on the inflow side on an actuator base 7 and downstream on an actuator head 8.
  • the actuator 4 is encapsulated in an actuator housing 9.
  • the fuel injection valve 1 downstream of the actuator 4 has a hydraulic coupler 10 which is mounted without pressure between the actuator 4 and a valve module 11.
  • the hydraulic coupler 10 is designed as a second medium coupler 10 and comprises a master piston 12 and a slave piston 13, which are acted upon by a coupler spring 14 against each other.
  • the hydraulic coupler 10 is sealed by an example corrugated gasket 15 against an interior 16 of the fuel injection valve 1.
  • the slave piston 13 of the hydraulic coupler 10 bears against a calotte 17, which cooperates via an actuating element 18 with a valve needle 19.
  • the calotte 17 ensures the compensation of offsets of the valve needle 19 during operation of the fuel injection valve 1.
  • the valve needle 19 has at its downstream end a valve closing body 20 which cooperates with a valve seat surface 21 to a sealing seat.
  • the exemplary embodiment is an outwardly opening fuel injection valve 1.
  • the actuator 4 Due to the fact that the actuator 4 is not floating, but fixed, it is possible to achieve a fixed thermal connection of the actuator 4 to the housing 2, whereby a gap between the actuator 4 and the housing 2 can be omitted. Thereby, the temperature of the actuator 4 can be lowered by better heat dissipation.
  • the electrical line 6 passes through the actuator foot 7 through holes 22 which are formed in the actuator base 7. Characterized in that the hydraulic coupler 10 is arranged downstream of the actuator 4, the electrical lines 6 can be laid shorter and without motion-compensating cable guides on the actuator 4. The valve housing 2 can thereby be made slimmer, since the electrical lines 6 do not have to be guided around the hydraulic coupler 10.
  • the fuel supply via a central inlet port 23, in which a filter 24 may be arranged. About holes 25 and formed between the actuator housing 9 and the valve housing 2 gap 26, the fuel is passed to the sealing seat.
  • the inlet nozzle 23 is provided in Fig. 2 with a plastic extrusion 27, on which a plug 28 is formed for the electrical lines 6.
  • 3A and 3B show detailed views of the plug 28 in a plan view of the fuel injection valve 1 in the outflow direction of the fuel.
  • FIG. 3A the fuel injection valve 1 without plastic extrusion 27 is shown in FIG. 1.
  • the electrical lines 6 are guided directly and straight into the actuator base 7 and extend parallel to the bore 25, through which the fuel from the inlet port 23 is supplied.
  • Fig. 3B the plug 28 is shown after the extrusion coating of the inlet nozzle 23 with plastic 27 in the same view.
  • the plastic extrusion 27 and the plug 28 are simple and inexpensive to produce in one process step.
  • the electrical lines 6 are through the plastic extrusion 27 on the inlet nozzle 23 and fixed on the actuator base 7 and protected from damage.
  • the coupler 10 is pivotally mounted between the actuator head 8 and the valve needle 19 by means of a calotte 17.
  • the cap 17 is in Fig. 1 and 2 between the hydraulic coupler 10 and an actuating element 18 which is in operative connection with the valve needle 19, respectively.
  • the invention is not limited to the illustrated embodiment and suitable for any designs of fuel injectors 1.

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) notamment pour des installations d'injection de carburant de moteurs à combustion interne,
    comprenant
    au moins un actionneur (4) piézo-électrique ou magnétostrictif alimenté par au moins une ligne électrique (6), cet actionneur commandant un organe d'obturation de soupape (20) installé dans un boîtier (2), et cet organe coopère avec une surface de siège de soupape (21) pour former un siège d'étanchéité,
    et un coupleur hydraulique (10),
    le coupleur hydraulique (10) étant installé de manière fixe entre l'actionneur (4) et un ensemble de soupape (11) comprenant l'organe d'obturation de soupape (20) et la surface formant siège de soupape (21) et
    le coupleur hydraulique (10) est monté pivotant sur une aiguille d'injecteur (19) par l'intermédiaire d'une calotte (17),
    caractérisé en ce que
    l'actionneur (4) est précontraint par un tube-ressort (5) entourant l'actionneur (4).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'actionneur (4) s'appuie par son extrémité côté amont contre un pied d'actionneur (7).
  3. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    le pied d'actionneur (7) est relié au boîtier (2).
  4. Injecteur de carburant selon la revendication 2 ou 3,
    caractérisé en ce que
    l'actionneur (4) s'appuie par son extrémité côté aval contre une tête d'actionneur (8).
  5. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    la tête d'actionneur (7) est reliée au coupleur hydraulique (10).
  6. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    le coupleur hydraulique (10) est monté pivotant sur la tête d'actionneur (8) par l'intermédiaire d'une calotte (17).
  7. Injecteur de carburant selon l'une des revendications 1 à 6,
    caractérisé en ce que
    le pied d'actionneur (7) comporte au moins un perçage axial (22).
  8. Injecteur de carburant selon la revendication 7,
    caractérisé en ce que
    les lignes électriques (6) sont logées dans au moins un perçage axial (22).
  9. Injecteur de carburant selon l'une des revendications 1 à 8,
    caractérisé en ce que
    l'injecteur (1) est prévu à l'extrémité côté alimentation d'un surmoulage en matière plastique (27).
  10. Injecteur de carburant selon la revendication 9,
    caractérisé en ce que
    le surmoulage en matière plastique (27) forme un connecteur (28).
  11. Injecteur de carburant selon la revendication 10,
    caractérisé en ce que
    les lignes électriques (6) débouchent dans le collecteur (28).
  12. Injecteur de carburant selon la revendication 11,
    caractérisé en ce qu'
    au moins une ligne électrique (6) est parallèle à l'axe longitudinal de l'injecteur (1) et de l'actionneur (4).
EP04704537A 2003-03-12 2004-01-23 Soupape d'injection de carburant Expired - Lifetime EP1606509B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10310790 2003-03-12
DE2003110790 DE10310790A1 (de) 2003-03-12 2003-03-12 Brennstoffeinspritzventil
PCT/DE2004/000098 WO2004081367A1 (fr) 2003-03-12 2004-01-23 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1606509A1 EP1606509A1 (fr) 2005-12-21
EP1606509B1 true EP1606509B1 (fr) 2007-08-29

Family

ID=32892081

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04704537A Expired - Lifetime EP1606509B1 (fr) 2003-03-12 2004-01-23 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US7635093B2 (fr)
EP (1) EP1606509B1 (fr)
JP (1) JP2006513363A (fr)
CN (1) CN100404846C (fr)
BR (1) BRPI0407942A (fr)
DE (2) DE10310790A1 (fr)
WO (1) WO2004081367A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10357189A1 (de) * 2003-12-08 2005-07-07 Robert Bosch Gmbh Brennstoffeinspritzventil
JP4614189B2 (ja) * 2008-05-12 2011-01-19 株式会社デンソー 燃料噴射装置
US20100001094A1 (en) * 2008-07-03 2010-01-07 Caterpillar Inc. Apparatus and method for cooling a fuel injector including a piezoelectric element
DE102012202909A1 (de) * 2012-02-27 2013-08-29 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
DE102013219225A1 (de) * 2013-09-25 2015-03-26 Continental Automotive Gmbh Piezo-Injektor zur Kraftstoff-Direkteinspritzung
CN103752431B (zh) * 2014-02-21 2015-12-30 厦门大学 模块化多线微射流雾化器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10360451A1 (de) * 2003-02-27 2004-09-09 Robert Bosch Gmbh Brennstoffeinspritzventil

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533085A1 (de) 1985-09-17 1987-03-26 Bosch Gmbh Robert Zumessventil zur dosierung von fluessigkeiten oder gasen
JPH0776590B2 (ja) 1988-06-09 1995-08-16 日本電装株式会社 圧電体アクチユエータを備えた油圧切換弁
DE3831196A1 (de) * 1988-09-14 1990-03-22 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
JP3029958B2 (ja) 1993-01-18 2000-04-10 シャープ株式会社 半導体記憶装置
DE19500706C2 (de) 1995-01-12 2003-09-25 Bosch Gmbh Robert Zumeßventil zur Dosierung von Flüssigkeiten oder Gasen
JPH10205406A (ja) 1997-01-27 1998-08-04 Denso Corp 燃料噴射弁
DE19817320C1 (de) * 1998-04-18 1999-11-11 Daimler Chrysler Ag Einspritzventil für Kraftstoffeinspritzsysteme
GB9811649D0 (en) 1998-05-29 1998-07-29 Lucas Ind Plc Fuel injector
DE19843535A1 (de) * 1998-09-23 2000-03-30 Bosch Gmbh Robert Brennstoffeinspritzventil
GB9823028D0 (en) 1998-10-22 1998-12-16 Lucas Ind Plc Fuel injector
DE19942816A1 (de) * 1999-09-08 2001-03-22 Daimler Chrysler Ag Einspritzventil
DE60016185T2 (de) 1999-09-13 2006-03-02 Asahi Glass Co., Ltd. Abdeckung
DE19950760A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil
GB9925753D0 (en) * 1999-10-29 1999-12-29 Lucas Industries Ltd Fuel injector
DE19963568A1 (de) * 1999-12-29 2001-07-05 Bosch Gmbh Robert Brennstoffeinspritzventil
US6729554B2 (en) 2000-10-05 2004-05-04 Denso Corporation Structure of fuel injector for avoiding injection of excess quantity of fuel
JP2002202028A (ja) 2000-12-28 2002-07-19 Denso Corp 燃料噴射弁
JP4140184B2 (ja) 2000-10-05 2008-08-27 株式会社デンソー 燃料噴射装置
DE10133265A1 (de) 2001-07-09 2003-01-23 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1415084B1 (fr) 2001-08-08 2010-11-03 Siemens Aktiengesellschaft Dispositif de dosage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10360451A1 (de) * 2003-02-27 2004-09-09 Robert Bosch Gmbh Brennstoffeinspritzventil

Also Published As

Publication number Publication date
US7635093B2 (en) 2009-12-22
EP1606509A1 (fr) 2005-12-21
BRPI0407942A (pt) 2006-02-21
US20060175438A1 (en) 2006-08-10
DE10310790A1 (de) 2004-09-23
DE502004004809D1 (de) 2007-10-11
JP2006513363A (ja) 2006-04-20
CN1759237A (zh) 2006-04-12
CN100404846C (zh) 2008-07-23
WO2004081367A1 (fr) 2004-09-23

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