EP1071878A1 - Injecteur avec piezo-actionneur multicouche - Google Patents

Injecteur avec piezo-actionneur multicouche

Info

Publication number
EP1071878A1
EP1071878A1 EP00907429A EP00907429A EP1071878A1 EP 1071878 A1 EP1071878 A1 EP 1071878A1 EP 00907429 A EP00907429 A EP 00907429A EP 00907429 A EP00907429 A EP 00907429A EP 1071878 A1 EP1071878 A1 EP 1071878A1
Authority
EP
European Patent Office
Prior art keywords
injector
actuator body
circular cylindrical
plate spring
valve
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.)
Granted
Application number
EP00907429A
Other languages
German (de)
English (en)
Other versions
EP1071878B1 (fr
Inventor
Friedrich Boecking
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 EP1071878A1 publication Critical patent/EP1071878A1/fr
Application granted granted Critical
Publication of EP1071878B1 publication Critical patent/EP1071878B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements

Definitions

  • the invention relates to an injector with a piezo multilayer actuator, in particular for "common rail”.
  • Diesel injection systems of motor vehicles which has a multi-layer actuator body which is seated within a longitudinal bore of an injector housing and is preloaded on the face side by preloading means.
  • FIG. 1 shows the section of the known injector lying around the actuator body.
  • the means prestressing the actuator body 1 consist of a valve-side disc spring 4 which, on the one hand, abuts or engages an annular flange 3 located on the valve-side end face of the actuator body 1 and, on the other hand, a radially inwardly projecting shoulder 5 of the injector housing 2. In this case it forms
  • Injector housing 2 itself the means for transmitting the biasing force exerted by the plate spring 4 to the other end face of the actuator body 1.
  • the arrow V indicates the direction to the valve. Due to the diameter of the plate spring 4 serving as a biasing element, the
  • an actuator body 1 seated centrally within an injector housing 2 is preloaded on the end face by a pretensioning bracket 6 with a right and left spring leg 6a, 6b by means of a first force-centering pressure element 7 and a second force-centering pressure element 8. Since the two legs 6a, 6b of the pretensioning bracket 6 require space to the left and right of the injector body 1, the outer diameter of the injector housing 2 cannot be reduced in the critical area in this case either.
  • the diameter of the components in the area of the actuator body must be chosen to be as small as possible.
  • An essential aspect of an injector according to the invention with a piezo multilayer actuator consists in that the prestressing means have at least one disc spring, which acts in a prestressing manner on the end face of the actuator body opposite an injector valve, and a force transmission element which is seated in the injector housing and is axially movable therein and which has the spring force of the disc spring ( n) transfers to the valve-side end of the actuator body.
  • the actuator body preferably has a circular cylindrical cross-sectional shape.
  • the sleeve-shaped injector housing has a circular cylindrical inner and outer contour at least in the area of the actuator body and surrounds the actuator body and the force transmission member, which forms a circular cylindrical clamping sleeve, the actuator body abutting a valve-side inner wall of this clamping sleeve and the plate springs between the opposite end face Attack the inner wall of the adapter sleeve and the adjacent face of the actuator body.
  • the biasing spring (s) causing the bias is behind, ie. H. provided on the side of the actuator body facing away from the valve, so that a narrow construction of the injector in the area of the actuator body is made possible.
  • the thicker actuator head with the plate spring or the plate springs is in the uncritical area of the cylinder head of the internal combustion engine.
  • Diesel injection injectors can be manufactured with piezo multi-layer actuators that are no longer than conventional solenoid valve injectors.
  • FIG. 1 shows in the form of a schematic longitudinal section the known injector already described with a valve-side pretensioning element designed as a plate spring.
  • FIG. 2 shows in the form of a schematic longitudinal section the other known injector already described, which contains a two-legged pretensioning bracket as the pretensioning element.
  • FIG. 3 shows a preferred exemplary embodiment of an injector according to the invention with a piezo multilayer actuator in the form of a schematic longitudinal section.
  • a cylindrical actuator body 10 of a piezo multilayer actuator which can have the form of a multilayer laminate composed of layers of piezoelectric material stacked on top of one another and metallic or electrically conductive layers serving as electrodes between them, is prestressed on the end face by means of prestressing means.
  • the biasing means consist of a plate spring assembly 14 and a cylindrical
  • Collet 11 which sit within a cylindrical injector housing 12.
  • the actuator body 10 of the piezo multilayer actuator ends on the end facing the valve V in a pressure bolt 16, which passes through a central bore 19 in the cylindrical clamping sleeve 11.
  • the opposite end to the valve The end face of the actuator body 10 ends in a support element 17, which in turn has a bolt-shaped end that projects through a central bore 20 of the clamping sleeve 11 and abuts there against a radial inner wall of the injector housing 12.
  • Preloading means d. H. the plate spring assembly 14 and the clamping sleeve 11 clamped end faces.
  • the clamping sleeve 11 which is seated in the central longitudinal bore 18 of the injector housing 12, moves together with the valve-side end, ie. H. with the pressure pin 16 of the actuator in the axial
  • the injector housing 12 in the section which is opposite the valve-side end of the actuator body 10, i. H. where the plate spring assembly 14 is located and the clamping sleeve 11 also form circular cylindrical radial extensions 15 and 13 within this section.
  • the plate springs of the plate spring assembly 14 can have a diameter sufficient for a desired spring force.
  • the embodiment according to the invention described above with reference to FIG. 3 offers an injector with a piezo multilayer actuator, since the prestressing element, i. H. the plate spring assembly 14 behind the actuator body 10, d. H. is at a position facing away from the valve side of the actuator body 10, a narrow construction of the injector in the area of the relatively long piezoelectric actuator body 10, the thicker head of which with the plate spring assembly 14 is in the uncritical area of the cylinder head of the internal combustion engine.
  • designs of an injector equipped with a piezo multilayer actuator are possible which are no longer than conventional solenoid valve injectors.

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

Injecteur, en particulier pour systèmes d'injection de diesel à rampe commune de véhicules à moteur, qui comporte un piézo-actionneur multicouche possédant un corps (10) logé à l'intérieur d'un trou longitudinal central (18) d'un boîtier (12) d'injecteur et précontraint au niveau de ses faces terminales par des moyens de précontrainte (11, 14). Ledit injecteur est caractérisé en ce que les moyens de précontrainte (11, 14) sont constitués d'au moins un ressort à disques (14) qui exerce sa précontrainte sur la face du corps (10) d'actionneur située à l'opposé d'une soupape d'injection (V) et d'un élément de transmission de force (11), logé dans le boîtier (12) d'injecteur et mobile axialement dans ledit boîtier, qui transmet la force de ressort du ressort à disques (14) à la face terminale du corps (10) d'actionneur située du côté de la soupape.
EP00907429A 1999-02-16 2000-01-14 Injecteur avec piezo-actionneur multicouche Expired - Lifetime EP1071878B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19906467A DE19906467A1 (de) 1999-02-16 1999-02-16 Injektor mit einem Piezo-Mehrlagenaktor
DE19906467 1999-02-16
PCT/DE2000/000122 WO2000049286A1 (fr) 1999-02-16 2000-01-14 Injecteur avec piezo-actionneur multicouche

Publications (2)

Publication Number Publication Date
EP1071878A1 true EP1071878A1 (fr) 2001-01-31
EP1071878B1 EP1071878B1 (fr) 2004-03-31

Family

ID=7897691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00907429A Expired - Lifetime EP1071878B1 (fr) 1999-02-16 2000-01-14 Injecteur avec piezo-actionneur multicouche

Country Status (6)

Country Link
US (1) US6371085B1 (fr)
EP (1) EP1071878B1 (fr)
JP (1) JP2002537515A (fr)
KR (1) KR20010042665A (fr)
DE (2) DE19906467A1 (fr)
WO (1) WO2000049286A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10002437A1 (de) * 2000-01-21 2001-08-16 Bosch Gmbh Robert Piezoaktor
DE10025997A1 (de) * 2000-05-25 2001-12-06 Bosch Gmbh Robert Piezoaktor
DE10122256A1 (de) * 2001-05-08 2002-11-21 Bosch Gmbh Robert Kraftstoff-Einspritzvorrichtung für Brennkraftmaschinen, insbesondere Common-Rail-Injektor, sowie Kraftstoffsystem und Brennkraftmaschine
DE10142798C2 (de) * 2001-08-31 2003-07-31 Bosch Gmbh Robert Lagerung für ein Piezoaktormodul in einem Common-Rail-Injektor
US6983894B2 (en) 2002-02-13 2006-01-10 Siemens Vdo Automotive Inc. Piezo-electrically actuated canister purge valve with a hydraulic amplifier
US6811093B2 (en) * 2002-10-17 2004-11-02 Tecumseh Products Company Piezoelectric actuated fuel injectors
US20050258715A1 (en) * 2004-05-19 2005-11-24 Schlabach Roderic A Piezoelectric actuator having minimal displacement drift with temperature and high durability
DE102005024710A1 (de) * 2005-05-30 2006-12-07 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005046174B4 (de) * 2005-09-27 2008-12-04 Siemens Ag Spannfeder
US20070075286A1 (en) * 2005-10-04 2007-04-05 Par Technologies, Llc Piezoelectric valves drive
DE602006016234D1 (de) * 2006-04-25 2010-09-30 Delphi Tech Holding Sarl Schutzverkapselung
DE102011084107A1 (de) 2011-10-06 2013-04-11 Continental Automotive Gmbh Piezoelektrischer Aktuator
DE102013012444A1 (de) * 2013-07-29 2015-01-29 Astrium Gmbh Ventilanordnung zum Schalten und/oder Regeln eines Medienstroms eines Raumfahrttriebwerks und Raumfahrttriebwerk
DE102014009025B4 (de) * 2014-06-24 2016-02-18 Airbus Ds Gmbh Biegerahmen zur Velängerung des Stellwegs eines Aktors für ein mechanisch betätigtes Bauteil

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533975A1 (de) * 1985-09-24 1987-03-26 Bosch Gmbh Robert Zumessventil zur dosierung von fluessigkeiten oder gasen
JPH07117012B2 (ja) * 1986-09-05 1995-12-18 トヨタ自動車株式会社 ユニツトインジエクタ
US5004945A (en) * 1988-09-26 1991-04-02 Nippondenso Co., Ltd. Piezoelectric type actuator
DE4306072C2 (de) * 1993-02-26 1994-12-08 Siemens Ag Vorrichtung zum Öffnen und Verschließen einer in einem Gehäuse vorhandenen Durchtrittsöffnung
DE19650900A1 (de) * 1996-12-07 1998-06-10 Bosch Gmbh Robert Piezoelektrischer Aktuator
DE19653555C2 (de) * 1996-12-20 2002-10-31 Siemens Ag Piezoelektrischer Aktor
DE19702066C2 (de) * 1997-01-22 1998-10-29 Daimler Benz Ag Piezoelektrischer Injektor für Kraftstoffeinspritzanlagen von Brennkraftmaschinen
DE19744235A1 (de) * 1997-10-07 1999-04-08 Fev Motorentech Gmbh & Co Kg Einspritzdüse mit piezoelektrischem Aktuator
US5875764A (en) * 1998-05-13 1999-03-02 Siemens Aktiengesellschaft Apparatus and method for valve control
DE19905413A1 (de) * 1999-02-10 2000-08-24 Bosch Gmbh Robert Injektor mit Piezo-Mehrlagenaktor für Einspritzsysteme
DE19919313B4 (de) * 1999-04-28 2013-12-12 Robert Bosch Gmbh Brennstoffeinspritzventil
US6253736B1 (en) * 1999-08-10 2001-07-03 Cummins Engine Company, Inc. Fuel injector nozzle assembly with feedback control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0049286A1 *

Also Published As

Publication number Publication date
EP1071878B1 (fr) 2004-03-31
DE50005857D1 (de) 2004-05-06
DE19906467A1 (de) 2000-08-24
WO2000049286A1 (fr) 2000-08-24
US6371085B1 (en) 2002-04-16
KR20010042665A (ko) 2001-05-25
JP2002537515A (ja) 2002-11-05

Similar Documents

Publication Publication Date Title
EP1082567B1 (fr) Actionneur piezoelectrique
EP1071878B1 (fr) Injecteur avec piezo-actionneur multicouche
WO1998025060A1 (fr) Actionneur piezoelectrique
EP0301267A1 (fr) Rotule située entre un culbuteur et une tige de soupape d'un moteur à combustion interne
DE19906468B4 (de) Piezoelektrischer Aktor
EP0477520B1 (fr) Bande de contact pour un contact commun d'une pluralité d'aggregats qui sont excités électriquement pour moteurs à moteurs à combustion interne
WO2003081023A1 (fr) Soupape d'injection de carburant
EP1115972A1 (fr) Soupape d'injection de carburant
EP2440770B1 (fr) Soupape d'injection avec unité de transmission
EP1519072B1 (fr) Ressort tubulaire pour un actionneur
WO2000047887A1 (fr) Injecteur avec piezo-actionneur multicouche pour systemes d'injection
WO2002086982A1 (fr) Dispositif pour transmettre la deviation d'un actionneur, et son procede de production
EP1190168B1 (fr) Actionneur
EP1144848B1 (fr) Soupape d'injection de carburant
EP1630408A1 (fr) Injecteur de carburant pour moteur à combustion interne et procédé de montage de cet injecteur
WO2008058799A1 (fr) Injecteur de carburant
EP1121526A1 (fr) Soupape d'injection de carburant
WO2004053324A1 (fr) Soupape d'injection de carburant
EP1354131A1 (fr) Soupape de regulation de liquides
EP1528607B1 (fr) Module actionneur
EP1508720B1 (fr) Ressort tubulaire pour actionneur
WO2006058811A1 (fr) Actionneur piezo-electrique servant a actionner un composant mecanique
DE102010062850A1 (de) Piezoelektrisches Bauelement und Brennstoffeinspritzventil mit einem Piezoaktor
EP1432047A2 (fr) Actionneur

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 20010226

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50005857

Country of ref document: DE

Date of ref document: 20040506

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20040708

ET Fr: translation filed
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050114

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050114

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20050104

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050114

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090327

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100803