EP1432908B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1432908B1
EP1432908B1 EP02742719A EP02742719A EP1432908B1 EP 1432908 B1 EP1432908 B1 EP 1432908B1 EP 02742719 A EP02742719 A EP 02742719A EP 02742719 A EP02742719 A EP 02742719A EP 1432908 B1 EP1432908 B1 EP 1432908B1
Authority
EP
European Patent Office
Prior art keywords
actuator
fuel injection
sleeve
injection valve
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
EP02742719A
Other languages
German (de)
English (en)
Other versions
EP1432908A1 (fr
Inventor
Walter Maeurer
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 EP1432908A1 publication Critical patent/EP1432908A1/fr
Application granted granted Critical
Publication of EP1432908B1 publication Critical patent/EP1432908B1/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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • 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
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • a fuel injection valve according to the preamble of Claim 1 is known from DE 40 05 455.
  • the Fuel injection valve for an internal combustion engine has at least one injection opening, which with at least one Supply line for pressurized fuel connected is.
  • a valve needle which closes the injection opening, or releases, is with a piezoelectric actuator connected.
  • a spring membrane seals a first space, the is free of fuel and contains the actuator, against one second room containing fuel. The spring membrane creates a closing force acting on the valve needle. With This closing force is charged to the non-actuated actuator.
  • a disadvantage of this known prior art is that the actuator in addition to the closing force of the spring diaphragm is loaded with a compressive force of the fuel. By this pressure force is the actuator compressed and the Output length of the unactuated actuator is reduced. It creates an unacceptably large game on the transmission path between actuator and valve closing body. When pressing the Actors go part of the stroke to overcome this game lost.
  • the fuel injection valve according to the invention with the Characteristic features of the main claim has the opposite the advantage that only a small change a biasing force occurs.
  • an elevated Fuel pressure acts, the barrel sleeve is compressed and exercises in its longitudinal direction between the valve body and Actuator head an expanding force.
  • the on the Actuator head also acting fuel pressure is the one opposing force.
  • advantageous simpler Way can thus be prevented that the actuator compressed by an increasing fuel pressure is and the initial length of the actuator inadmissible large changes.
  • the contour line of the barrel sleeve is in relation to a imaginary midline. through the symmetry axis of Barrel sleeve a substantially convex arched outward Line.
  • the longitudinal section and the elasticity of the barrel sleeve on each other matched that the change in length of the actuator of the strain of the valve body with pressure increase of the fuel equivalent.
  • An increase in fuel pressure occurs also to an expansion of the valve body. This can cause it Errors on the transmission path of the opening force of the Actuator come to the valve closing body by an invalid Game occurs between transmission components. This can by a favorable choice of the behavior of the barrel sleeve a pressure change of the fuel can be compensated.
  • Barrel sleeve a compressible in the longitudinal direction cylindrical spring sleeve and is located between barrel sleeve and spring sleeve a support ring.
  • a spring sleeve enclosing the actuator arranged and with the valve body and the actuator head positively connected.
  • Fig. 1 shows a detail section through a Fuel injection valve according to the prior art in Area of a piezoelectric actuator 1, which at a Carrier 2 is arranged and by a sealing sleeve. 3 relative to the surrounding fuel-containing space is sealed. Carrier 2 and sleeve 3 are over a Weld 4 connected.
  • the actuator 1 is connected via a Actuator head 5 and a coil spring 6, which oppose a End plate 7 is supported, in the direction of the carrier. 2 biased. End plate 7 and sleeve 3 are over a annular weld 8 connected to each other, against seals the fuel.
  • the actuator head 5 has a this integrally formed plunger 9, by a recess in the support plate 7 is passed.
  • FIG. 2 shows a schematic detail section by a first embodiment of an inventive Fuel injection valve in the range of piezoelectric or magnetostrictive actuator 1.
  • a fuel inlet 13 is provided, the leads to a fuel chamber 14.
  • the actuator 1 is connected to the Actuator 1 in FIG. 1 identical to the prior art.
  • the actuator 1 is between the valve body 12 and a Actuator 15 is arranged.
  • a barrel sleeve 16 is over a Weld 17 connected to the valve body 12 and over another weld 18 is connected to the actuator head 15.
  • the welds 17, 18 and the actuator head 15 and the Barrel sleeve 16 seal the actuator 1, which is in one Actuator 19 is located opposite the fuel chamber 14 from.
  • About connection channels 20 can be electrical leads to the Actuator 1 are performed.
  • the barrel sleeve 16 When the pressure in the fuel chamber 14 is increased, the barrel sleeve 16 is compressed and approaches more a cylindrical shape. But this is counteracted by the power by the pressure of the fuel on the actuator head 15th is exercised. At the same time, the barrel sleeve 16 has a Preload in the longitudinal direction of the actuator 1, so that the Actuator 1 with its two ends in each case to the valve body 12 and the actuator head 15 with a biasing force, the is directed towards each other, is charged, and to the Valve body 12 and the valve head 15 abuts.
  • Fig. 3 shows a section through another Embodiment of an inventive Fuel injection valve in the region of an actuator. 1
  • the actuator 1 is between the Valve body 12 and the actuator head 15 is arranged.
  • the Barrel sleeve 16 is connected to the weld 17 with the Valve body 12 connected.
  • a spring sleeve 22 which between Actuator 15 and barrel 16 is arranged. Over a Weld 23 is the spring sleeve 22 with the actuator head 15th connected.
  • a Support ring 24 arranged with the barrel sleeve 16 via a Weld 25 is connected and the spring sleeve 22 via a further weld 26.
  • the spring sleeve 22 is not radially compressible, but only in the longitudinal direction. This can be done in a simple way and Make the characteristic of the longitudinal extent of the actuator 1 over the pressure in the fuel chamber 14 to a special Be adapted application without each one specially adapted barrel sleeve 16 or a special adapted actuator head 15 is necessary.
  • Fig. 4 shows a section through another Embodiment of an inventive Fuel injection valve in the region of an actuator 1.
  • Der schematic structure corresponds to that of the embodiment in of Fig. 2.
  • the barrel sleeve 16 is with the weld 17 on the valve body 12 and with the Weld seam 18 attached to the actuator head .15.
  • About one Fuel inlet 13, the fuel a fuel space 14 inflow.
  • a Spring sleeve 27 which surrounds the actuator 1.
  • the spring sleeve 27 is via a weld 29 with the valve body 12th connected and via another weld 28 with the Actuator head 15.
  • the invention is not limited to those shown Embodiment limited, but can also at a. Variety of other designs of fuel injectors in particular, is another sequence of Spring sleeves and barrel sleeves, or a multiple sequence of spring sleeves and barrel sleeve in a row or each other enclosing conceivable.

Landscapes

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

Abstract

Soupape d'injection de carburant, en particulier pour des systèmes d'injection de carburant de moteurs à combustion interne, qui possède un actionneur piézo-électrique ou magnétostrictif (1) placé entre un corps (12) de soupape et une tête (15) d'actionneur et actionnant à l'aide d'une aiguille de soupape un obturateur, ledit obturateur coopérant avec une surface de siège de soupape pour former un siège étanche. Un manchon en forme de tonneau (16) à forme convexe entre deux diamètres situés à ses extrémités étanchéifie l'actionneur (1) par rapport à une chambre de carburant (14) et entoure l'actionneur (1). Ledit manchon en forme de tonneau (16), qui est relié par liaison de force, au niveau de ses extrémités, au corps (12) de soupape et à la tête (15) d'actionneur, est précontraint en traction dans un sens longitudinal de l'actionneur (1).

Claims (9)

  1. Soupape d'injection de carburant notamment injecteur pour des installations d'injection de carburant équipant des moteurs à combustion interne comportant un actionneur (1) piézo-électrique ou magnétostrictif installé entre un corps d'injecteur (12) et une tête d'actionneur (15) et un organe d'obturation de soupape actionné par une aiguille d'injecteur par l'actionneur (1), cet organe d'obturation coopérant avec une surface de siège d'étanchéité pour former un siège d'étanchéité,
    caractérisée en ce qu'
    un manchon en forme de barillet (16) ayant en coupe longitudinale une forme convexe avec deux diamètres à ses extrémités, assure l'étanchéité de l'actionneur (1) par rapport à la chambre à carburant (14) et entoure celui-ci,
    le manchon en forme de barillet (16) étant relié par ses extrémités au corps de soupape (12) et à la tête d'actionneur (15) par une liaison par la force en étant précontraint en traction dans la direction longitudinale de l'actionneur (1).
  2. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    la coupe longitudinale et l'élasticité du manchon en forme de barillet (16) sont accordées pour que la surface supérieure du manchon en forme de barillet (16) corresponde au cas d'augmentation de pression du carburant environnant, au même volume que la tête d'actionneur (15).
  3. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    la coupe longitudinale et l'élasticité du manchon en forme de barillet (16) sont accordées pour que la variation de longueur de l'actionneur (1) correspond à l'allongement du corps de soupape (12) en cas d'augmentation de la pression du carburant.
  4. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 3,
    caractérisée en ce que
    le manchon en forme de barillet (16) se poursuit par un manchon à réssort (22) de forme cylindrique compressible dans la direction longitudinale.
  5. Soupape d'injection de carburant selon la revendication 4,
    caractérisée par
    un anneau d'appui (24) installé entre le manchon en forme de barillet (16) et le manchon à ressort (22).
  6. Soupape d'injection de carburant selon l'une quelconque des revendications 4 ou 5,
    caractérisée par
    une succession de plusieurs manchons en forme de barillet (16) et de manchons à ressort (22) dans la direction longitudinale.
  7. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 6,
    caractérisée en ce qu'
    un élément à ressort entourant l'actionneur (1) est prévu à l'intérieur du manchon en forme de barillet (16).
  8. Soupape d'injection de carburant selon la revendication 7,
    caractérisée en ce que
    l'élément à ressort est un manchon à ressort (27).
  9. Soupape d'injection de carburant selon la revendication 8,
    caractérisée en ce que
    le manchon à ressort (27) est relié par une liaison par la force au corps de soupape (12) et à la tête d'actionneur (15).
EP02742719A 2001-07-27 2002-05-07 Soupape d'injection de carburant Expired - Lifetime EP1432908B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10136807 2001-07-27
DE10136807A DE10136807A1 (de) 2001-07-27 2001-07-27 Brennstoffeinspritzventil
PCT/DE2002/001641 WO2003012282A1 (fr) 2001-07-27 2002-05-07 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1432908A1 EP1432908A1 (fr) 2004-06-30
EP1432908B1 true EP1432908B1 (fr) 2005-01-26

Family

ID=7693403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02742719A Expired - Lifetime EP1432908B1 (fr) 2001-07-27 2002-05-07 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US20040046060A1 (fr)
EP (1) EP1432908B1 (fr)
JP (1) JP2004522069A (fr)
KR (1) KR20040026691A (fr)
DE (2) DE10136807A1 (fr)
WO (1) WO2003012282A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7145282B2 (en) 2004-07-15 2006-12-05 Delphi Technologies, Inc. Actuator
DE102005029471B4 (de) * 2005-06-24 2007-06-14 Siemens Ag Verfahren zur Herstellung einer hohlzylindrischen Feder
DE102007008901B4 (de) * 2007-02-23 2008-10-16 Compact Dynamics Gmbh Fluid-Einspritzventil
DE102008037276B4 (de) * 2008-08-11 2011-02-10 Continental Automotive Gmbh Einspritzventil
EP2336543A3 (fr) * 2009-12-21 2013-07-03 Robert Bosch GmbH Soupape d'injection de carburant pour moteurs à combustion interne
US10039384B1 (en) * 2017-03-29 2018-08-07 Dongguan City Canaan Furniture Co., Ltd. Anti-noise spring chair
US10655523B2 (en) * 2018-07-25 2020-05-19 Tenneco Automotive Operating Company Inc. Reagent injector freeze protection

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2032005A1 (de) * 1970-06-29 1972-01-05 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzventil
US3788546A (en) * 1972-06-26 1974-01-29 Caterpillar Tractor Co Fuel injection system
DE2625141A1 (de) * 1976-06-04 1977-12-22 Bosch Gmbh Robert Unterdruckbegrenzer fuer eine kraftstoffeinspritzanlage
JPH0794812B2 (ja) * 1987-12-29 1995-10-11 トヨタ自動車株式会社 インジェクタ用アクチュエータ
DE4005455A1 (de) * 1989-02-28 1990-08-30 Volkswagen Ag Zumessventil, insbesondere kraftstoff-einspritzventil fuer eine brennkraftmaschine
JP2692396B2 (ja) * 1991-02-22 1997-12-17 日本電気株式会社 圧電アクチュエータおよびその製造方法
US5211341A (en) * 1991-04-12 1993-05-18 Siemens Automotive L.P. Fuel injector valve having a collared sphere valve element
DE19854506C1 (de) * 1998-11-25 2000-04-20 Siemens Ag Dosiervorrichtung
DE19856201A1 (de) * 1998-12-05 2000-06-15 Bosch Gmbh Robert Piezoelektrischer Aktor
DE19908471A1 (de) * 1999-02-26 2000-09-14 Siemens Ag Hohlzylindrische Feder
DE19912665A1 (de) * 1999-03-20 2000-09-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19912666A1 (de) * 1999-03-20 2000-09-21 Bosch Gmbh Robert Brennstoffeinspritzentil
DE19947067A1 (de) * 1999-09-30 2001-05-10 Siemens Ag Geräuschgedämpfte Aktoreinheit mit einem Aktorelement
DE19962177A1 (de) * 1999-12-22 2001-07-12 Siemens Ag Hydraulische Vorrichtung zum Übertragen einer Aktorbewegung

Also Published As

Publication number Publication date
DE50202148D1 (de) 2005-03-03
EP1432908A1 (fr) 2004-06-30
JP2004522069A (ja) 2004-07-22
KR20040026691A (ko) 2004-03-31
US20040046060A1 (en) 2004-03-11
DE10136807A1 (de) 2003-02-13
WO2003012282A1 (fr) 2003-02-13

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