EP0222097A1 - Injection de carburant - Google Patents

Injection de carburant Download PDF

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Publication number
EP0222097A1
EP0222097A1 EP86112456A EP86112456A EP0222097A1 EP 0222097 A1 EP0222097 A1 EP 0222097A1 EP 86112456 A EP86112456 A EP 86112456A EP 86112456 A EP86112456 A EP 86112456A EP 0222097 A1 EP0222097 A1 EP 0222097A1
Authority
EP
European Patent Office
Prior art keywords
plate
conductor
fuel injection
insulating film
ceramic
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
EP86112456A
Other languages
German (de)
English (en)
Other versions
EP0222097B1 (fr
Inventor
Burkhard Brandner
Dieter Graef
Klaus Wenzlik
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.)
Schaeffler Engineering GmbH
Original Assignee
AFT Atlas Fahrzeugtechnik 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 AFT Atlas Fahrzeugtechnik GmbH filed Critical AFT Atlas Fahrzeugtechnik GmbH
Publication of EP0222097A1 publication Critical patent/EP0222097A1/fr
Application granted granted Critical
Publication of EP0222097B1 publication Critical patent/EP0222097B1/fr
Expired 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
    • 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

Definitions

  • the invention relates to a fuel injection valve with a piezoceramic valve body comprising a plurality of ceramic plates layered one on top of the other with a conductor layer on each side of each ceramic plate and with voltage leads to the conductor layers.
  • a fuel injection valve of the type mentioned is described in DE-OS 24 02 085.
  • adjacent ceramic bodies are equipped on both sides with conductor layers and separated from each other by an insulating layer.
  • the conductor layers are connected to the electrodes. A connection of such conductor layers to electrodes is difficult and complex.
  • DE-OS 17 51 543 describes a fuel injection valve in which a metallic carrier plate carries ceramic plates. These are polarized in opposite directions, which causes asymmetries and unevenness in the travel. The voltage connection to the carrier plate is also critical here.
  • the object of the invention is a mechanically stable and permanent contacting of the conductor foils in order to achieve a long service life.
  • each ceramic plate sits on a carrier plate, that between each unit consisting of ceramic plate and carrier plate, an insulating film is arranged with conductor foils arranged on each side as conductor layers, that each insulating film has two connecting lugs, that each insulating film in the Area of a terminal lug is laminated on one side with a conductor foil and that the associated terminal lugs are each connected to a contact for the associated contact foils.
  • the invention differs from the prior art in that as the conductor foils for the voltage supply to the carrier plate and to the ceramic plate are each formed with an insulating foil as a composite foil, so that the conductor arrangement has a firm cohesion. This enables a stable and permanent voltage connection. With this arrangement, the individual ceramic plates can be operated in the same orientation, so that precise position-dependent control is possible. The connection lugs of the insulating and conductor foils can be easily and permanently contacted.
  • Reliable contacting is achieved in that associated terminal lugs are folded over at their ends with external conductor foil and layered on top of one another on a contact pin. This refolding ensures that the conductor foils of adjacent terminal lugs are in direct electrical contact with one another, so that reliable contacting is ensured.
  • the plate stack made of carrier plates, ceramic plates and composite films is closed on both sides by a metal plate.
  • the fuel injector is further characterized in that the stack sits on a valve stem carrying a valve needle and is clamped between a spring and an abutment collar of the valve stem, that the stack lies on a collar of the valve housing and is biased by a compression spring against this collar in the closing direction of the valve needle is.
  • This arrangement enables an advantageous construction in that the plate stack is supported at the edge within the valve housing and is prestressed in the closing direction of the valve needle.
  • a support plate is arranged within the valve housing, on which the compression spring is supported on the one hand and which receives the contact pins on the other hand.
  • the fuel injection valve comprises a valve housing 1 with a cover 2 and an injection nozzle 3. Inside the injection nozzle 3 there is an injection channel 4, which is closed by a valve closure 5 seated on a valve stem 6. A fuel supply channel 7 and a filter body 8 are located within the cover. A plug connection 9 with two contact pins 10, 11 is also provided.
  • the piezoceramic valve body 12 is located within the valve housing, the structure of which is explained in detail with reference to FIGS. 3 and 4.
  • the valve body 12 is constructed in the form of a plate pack.
  • a plurality of metallic carrier plates 13 can be seen, each carrying a ceramic plate 14.
  • the ceramic plate 14 is firmly connected to the respective carrier plate 13 according to a conventional technique.
  • Composite foils are arranged between these plates for contacting and consist of an insulating foil 15 with metallic conductor foils 16 laminated on both sides.
  • the insulating films 15 are laminated on both sides in the manner described.
  • the respective end insulating foils 151 and 152 are laminated on one side only with a conductor foil 16.
  • the stack of plates is closed on both sides by a metal plate 17, 18.
  • the metal plate 17 rests on the one hand on a collar 19 of the valve stem 6 and on the other hand on a collar 20 of the valve housing 1. In the area of the federal government 20 there are passage channels 21 for the fuel.
  • a spring washer 22 is supported on the metal plate 18 and is held in a groove 23 of the valve stem 6. This spring washer 22 holds the plate pack or the valve body 12 together, so that sufficient electrical contact between the conductor foils 6 and the carrier plates 13 or ceramic plates 14 is ensured.
  • Each double-sided laminated insulating film 15 has two connecting lugs 26, 27.
  • Each terminal lug 26 is laminated on one side with the conductor foil 16 of a voltage polarity. 3, this is the positive voltage polarity.
  • the terminal insulating film 151 has only one connection lug corresponding to the polarity mentioned.
  • the terminal lugs 26 are each folded over at the end, so that the conductor foil 16 lies on the outside in the region of this fold 28. These folds 28 are placed one above the other and placed on the contact pin 11 of the corresponding polarity. Conductor foils of adjacent insulating foils thus lie on top of one another. This ensures a secure conductive connection.
  • the contact pin 11 is fastened and fixed in the support plate 24.
  • the conductor foils of opposite polarity are guided to the contact pin 10 via the connecting lugs 27, as is shown in FIG. 4.
  • an insulating film 152 has only one connecting lug 27.
  • the folds 28 are provided at the end.
  • the individual ceramic plates of the plate stack are electrically connected in parallel, so that each ceramic plate makes a precisely defined contribution to the opening force.
  • a corresponding number of ceramic plates can provide any opening force.
  • a desired characteristic curve can also be achieved by appropriate dimensioning of the individual ceramic plates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP86112456A 1985-09-13 1986-09-09 Injection de carburant Expired EP0222097B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853532660 DE3532660A1 (de) 1985-09-13 1985-09-13 Kraftstoffeinspritzventil
DE3532660 1985-09-13

Publications (2)

Publication Number Publication Date
EP0222097A1 true EP0222097A1 (fr) 1987-05-20
EP0222097B1 EP0222097B1 (fr) 1988-12-07

Family

ID=6280840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112456A Expired EP0222097B1 (fr) 1985-09-13 1986-09-09 Injection de carburant

Country Status (4)

Country Link
US (1) US4739929A (fr)
EP (1) EP0222097B1 (fr)
JP (1) JP2515991B2 (fr)
DE (1) DE3532660A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1630408A1 (fr) * 2004-08-25 2006-03-01 Siemens Aktiengesellschaft Injecteur de carburant pour moteur à combustion interne et procédé de montage de cet injecteur

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3800203C2 (de) * 1988-01-07 1997-08-14 Atlas Fahrzeugtechnik Gmbh Kraftstoffeinspritzventil
AU5270490A (en) * 1989-03-07 1990-10-09 Karl Holm An atomizing nozzle device for atomizing a fluid and an inhaler
JPH06304059A (ja) * 1991-11-22 1994-11-01 Takaraya Bussan Kk ツリー装飾用ランプ装置
DE19849203A1 (de) * 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil
KR20020036230A (ko) * 2000-11-09 2002-05-16 이계안 피에조 세라믹을 이용한 가변 엔티피 장치
DE10147669A1 (de) * 2001-09-27 2003-04-10 Bosch Gmbh Robert Piezoaktor zur Betätigung eines mechanischen Bauteils
DE10149914A1 (de) * 2001-10-10 2003-04-24 Bosch Gmbh Robert Brennstoffeinspritzventil
US6739575B2 (en) * 2002-06-06 2004-05-25 Caterpillar Inc Piezoelectric valve system
US6811093B2 (en) * 2002-10-17 2004-11-02 Tecumseh Products Company Piezoelectric actuated fuel injectors
US7077379B1 (en) 2004-05-07 2006-07-18 Brunswick Corporation Fuel injector using two piezoelectric devices
US10241500B2 (en) 2015-08-10 2019-03-26 Buerkert Werke Gmbh Film transducer and actuator strip for a film transducer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2411533A1 (fr) * 1977-12-06 1979-07-06 Sony Corp Transducteur electromecanique
FR2425599A1 (fr) * 1978-05-10 1979-12-07 Commissariat Energie Atomique Vanne de reglage du debit d'un fluide
EP0107059A1 (fr) * 1982-10-01 1984-05-02 General Electric Company Sonde de courant
US4471256A (en) * 1982-06-14 1984-09-11 Nippon Soken, Inc. Piezoelectric actuator, and valve apparatus having actuator
US4492360A (en) * 1982-06-07 1985-01-08 The Lee Company Piezoelectric valve

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH429228A (de) * 1964-12-10 1967-01-31 Kistler Instrumente Ag Piezoelektrischer Einbaukörper zum Einbau in einen piezoelektrischen Wandler
DE1751543A1 (de) * 1968-06-15 1970-08-27 Kloeckner Humboldt Deutz Ag Elektrisch steuerbares Einspritzventil
NL7301617A (fr) * 1973-02-06 1974-08-08
US4160184A (en) * 1978-01-09 1979-07-03 The Singer Company Piezoelectric actuator for a ring laser
DE3313837A1 (de) * 1983-04-16 1984-10-18 Atlas Fahrzeugtechnik GmbH, 5980 Werdohl Niederdruckeinspritzventil
JPS601369A (ja) * 1983-06-16 1985-01-07 Nippon Soken Inc 燃料噴射弁
ATE65004T1 (de) * 1983-09-29 1991-07-15 Siemens Ag Wandlerplatte fuer piezoelektrische wandler und vorrichtung zu deren herstellung.
US4635849A (en) * 1984-05-03 1987-01-13 Nippon Soken, Inc. Piezoelectric low-pressure fuel injector
JPS60181996U (ja) * 1984-05-11 1985-12-03 呉羽化学工業株式会社 電極端子取り出し構造体

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2411533A1 (fr) * 1977-12-06 1979-07-06 Sony Corp Transducteur electromecanique
FR2425599A1 (fr) * 1978-05-10 1979-12-07 Commissariat Energie Atomique Vanne de reglage du debit d'un fluide
US4492360A (en) * 1982-06-07 1985-01-08 The Lee Company Piezoelectric valve
US4471256A (en) * 1982-06-14 1984-09-11 Nippon Soken, Inc. Piezoelectric actuator, and valve apparatus having actuator
EP0107059A1 (fr) * 1982-10-01 1984-05-02 General Electric Company Sonde de courant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 6, Nr. 25 (E-94)[903], 13. Februar 1982; & JP-A-56 144 585 (TOKYO SHIBAURA DENKI K.K.) 10-11-1981 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1630408A1 (fr) * 2004-08-25 2006-03-01 Siemens Aktiengesellschaft Injecteur de carburant pour moteur à combustion interne et procédé de montage de cet injecteur

Also Published As

Publication number Publication date
EP0222097B1 (fr) 1988-12-07
JPS62111158A (ja) 1987-05-22
DE3532660A1 (de) 1987-03-26
DE3532660C2 (fr) 1990-05-31
US4739929A (en) 1988-04-26
JP2515991B2 (ja) 1996-07-10

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