EP0045530B1 - Soupape injectrice de combustible pour moteurs à combustion - Google Patents

Soupape injectrice de combustible pour moteurs à combustion Download PDF

Info

Publication number
EP0045530B1
EP0045530B1 EP81200371A EP81200371A EP0045530B1 EP 0045530 B1 EP0045530 B1 EP 0045530B1 EP 81200371 A EP81200371 A EP 81200371A EP 81200371 A EP81200371 A EP 81200371A EP 0045530 B1 EP0045530 B1 EP 0045530B1
Authority
EP
European Patent Office
Prior art keywords
valve
needle
injection
valve needle
nozzle body
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
Application number
EP81200371A
Other languages
German (de)
English (en)
Other versions
EP0045530A3 (en
EP0045530A2 (fr
Inventor
Karl Hofmann
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 EP0045530A2 publication Critical patent/EP0045530A2/fr
Publication of EP0045530A3 publication Critical patent/EP0045530A3/de
Application granted granted Critical
Publication of EP0045530B1 publication Critical patent/EP0045530B1/fr
Expired legal-status Critical Current

Links

Images

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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the independent claim.
  • a known injection valve of this type (DE-A-27 48 447) in which, however, the valve needle and the valve seat form a switch for controlling an ignition device, the valve needle is directly coated with a thin layer of ceramic, electrically insulating material or with a cathode spray method applied thin aluminum oxide layer coated.
  • the valve needle is contacted via the closing spring assigned to it, which requires the arrangement of an additional insulating sleeve surrounding the closing spring and / or possibly a highly undesirable increase in the outside diameter of the injection valve.
  • the switch is likewise formed by the valve needle and the valve seat.
  • the valve needle is not guided in the nozzle body containing the valve seat, but rather in a bush which is insulated from the nozzle body and is arranged within the closing spring.
  • This design requires a special type of injection valve which differs from the usual, in which the relatively short guidance of the valve needle further away from the valve seat also appears to be disadvantageous, particularly with regard to an exact signaling.
  • the patent proposes the arrangement of insulating parts made of aluminum, which are coated with an anodic oxidation layer.
  • injection valves which can be connected to test devices are known (US Pat. No. 3,942,366) in which an electrical switch is arranged upstream of the valve needle within the closing spring and the movable contact of the switch is connected to the valve needle or is influenced by the latter via a fuel cushion.
  • a relatively large effort is required so that the switch responds exactly when the valve needle is lifted off the valve seat.
  • the arrangement according to the invention with the characterizing features of the independent claim has the advantage that an exact signaling is achieved without additional insulating parts and without increasing the diameter of the injection valve.
  • the injection valve can largely consist of adapted components of standard designs in which the valve needle is guided close to the valve seat in the nozzle body.
  • the insulating layer on the aluminum sleeve of the valve needle known as a hard coat layer, fulfills all requirements with regard to insulation and wear resistance with reasonable manufacturing costs.
  • the oxide layer on the aluminum sleeve can expediently be applied by means of anodic oxidation.
  • the fuel injection valve for internal combustion engines is mainly made of electrically conductive materials and is rotationally symmetrical with respect to the valve axis 9. It essentially consists of a nozzle holder 10, an adjoining intermediate plate 11 and a nozzle body 12, all of which are screwed together by a union nut 13.
  • a valve needle 15 has a needle shaft 18 which slides indirectly in a guide bore 14 of the nozzle body 12, a sealing cone 17 which interacts with a valve seat 16 of the nozzle body 12 and a pressure pin 19 which, when the injection valve is inoperative, is in constant contact with a pressure pin 20.
  • an open end space 21 with a shoulder 22 and a bore 23 are recessed, to which an outwardly leading recess 24 continues.
  • a helical compression spring 25 is supported on the one hand via a spring adjusting disk 26 on the shoulder 22 and on the other hand via an insulation to be described on the pressure bolt 20.
  • the fuel passes through inlet channels 29-32 and ring channels 33, 34 into a pressure chamber 27 of the nozzle body 12, which has a connection to a spray opening 28 via the valve seat 16.
  • a line element 40 made of electrically conductive materials consists of a contact pin 41 fastened in the bore 23 by means of an insulating sleeve 42, a contact spring 43 clamped onto the end section thereof and a contact cone 44 which is blasted into the latter. so that there is constant electrical contact between the two parts.
  • a guide surface 48 and a bearing surface 49 of the pressure pin 20 are coated with an insulation 47 made of abrasion-resistant material, so that the pressure spring 25 is electrically insulated from the pin 20.
  • the contact tongue 52 receives a line of a test device, not shown, and in the sleeve 53, the end portion of a connecting line 54 is soldered; the other end section of this connecting line is also connected to the contact pin 41.
  • a sleeve 60 made of aluminum is fastened on the needle shaft 18 of the valve needle 15, and the outer jacket of the sleeve 60 carries an aluminum oxide layer 61.
  • This layer is produced by anodic oxidation (anodizing) and slides in the guide bore 14 of the nozzle body 12.
  • the injector is screwed into its functional state in the engine block, not shown, and consequently has electrically conductive contact with the ground of the vehicle electrical system.
  • the electrical switch formed by the valve seat 16 and the sealing cone 17 is closed, as a result of which a circuit between the nozzle body 12 and the test device (not shown) is also closed.
  • the electrical switch 16/17 is open - and since the valve needle 15, the pressure pin 20, the contact pin 41 and the connector 50 have electrical insulation with respect to the nozzle body 12 and the nozzle holder 10 - the current path opens and thus interrupts the circuit electrical connection between Mortorblock and test device.

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 (2)

1. Soupape d'injection de carburant pour moteur à combustion interne, comprenant un siège de soupape (16) dans un corps de buse en matériau électriquement conducteur, et un pointeau de soupape (15) en matériau électriquement conducteur, lequel, sous l'effet de la pression du carburant et contre la force d'un ressort de compression (25) est soulevé au-dessus du siège de soupape (16), et qui forme, avec le siège de soupape (16), un contacteur électrique pour la commande d'un appareil électrique de contrôle qui enregistre le début d'injection et/ou la durée d'injection, une couche isolante en oxyde d'aluminium étant prévue autour de la tige (18) du pointeau qui glisse dans un perçage de guidage du corps de buse, soupape caractérisée en ce que le pointeau de soupape (15) est constituée en acier, une douille (60) en aluminium est fixée sur la tige (18) du pointeau, et la couche d'oxyde d'aluminium est appliquée sur l'enveloppe extérieure de la douille (60), et, en outre, la mise en contact électrique du pointeau (15) est assurée par une pointe de contact (41), qui traverse le centre du ressort de fermeture (25) qui agit, par l'intermédiaire d'une couche isolante (47) sur le pointeau de soupape (15).
2. Soupape d'injection suivant la revendication 1, caractérisée en ce que la couche d'oxyde d'aluminium (61) est réalisée et appliquée par oxydation anodique.
EP81200371A 1980-08-06 1981-04-03 Soupape injectrice de combustible pour moteurs à combustion Expired EP0045530B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3029721 1980-08-06
DE3029721A DE3029721A1 (de) 1980-08-06 1980-08-06 Kraftstoff-einspritzventil fuer brennkraftmaschinen

Publications (3)

Publication Number Publication Date
EP0045530A2 EP0045530A2 (fr) 1982-02-10
EP0045530A3 EP0045530A3 (en) 1982-06-23
EP0045530B1 true EP0045530B1 (fr) 1984-09-05

Family

ID=6108983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200371A Expired EP0045530B1 (fr) 1980-08-06 1981-04-03 Soupape injectrice de combustible pour moteurs à combustion

Country Status (4)

Country Link
US (1) US4398670A (fr)
EP (1) EP0045530B1 (fr)
JP (1) JPS5752672A (fr)
DE (2) DE3029721A1 (fr)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3241390A1 (de) * 1981-11-10 1983-05-19 Nippondenso Co., Ltd., Kariya, Aichi Brennstoffeinspritzvorrichtung fuer dieselmotore
FR2526483A1 (fr) * 1982-05-06 1983-11-10 Gurtner Sa Procede et dispositif de visualisation de l'injection d'huile dans un moteur deux temps a graissage separe
GB2125894B (en) * 1982-08-26 1986-09-17 Lucas Ind Plc I.c. engine fuel injection nozzle
DE3300876A1 (de) * 1983-01-13 1984-07-19 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzpumpe
JPS59169210U (ja) * 1983-04-28 1984-11-13 本田技研工業株式会社 自動車の換気装置
GB8318635D0 (en) * 1983-07-09 1983-08-10 Lucas Ind Plc Fuel injection nozzles
US4625918A (en) * 1983-07-29 1986-12-02 Diesel Kiki Co., Ltd. Fuel injection valve
JPS6045872U (ja) * 1983-09-07 1985-03-30 株式会社ボッシュオートモーティブ　システム 燃料噴射弁
JPS6085248A (ja) * 1983-10-18 1985-05-14 Diesel Kiki Co Ltd 燃料噴射弁
JPS60129483A (ja) * 1983-12-14 1985-07-10 Diesel Kiki Co Ltd 電磁弁
JPS60135661A (ja) * 1983-12-21 1985-07-19 Ngk Spark Plug Co Ltd 弁開閉制御用ソレノイド付燃料噴射装置
JPS60182351A (ja) * 1984-02-28 1985-09-17 Diesel Kiki Co Ltd スイツチ付弁装置
US4662564A (en) * 1984-05-15 1987-05-05 Diesel Kiki Co., Ltd. Fuel injection nozzle with timing sensor
US4573349A (en) * 1984-06-28 1986-03-04 International Harvester Company Needle position indicator for a fuel injection nozzle holder
GB8719372D0 (en) * 1987-08-15 1987-09-23 Lucas Ind Plc Fuel injection nozzle
AU5270490A (en) * 1989-03-07 1990-10-09 Karl Holm An atomizing nozzle device for atomizing a fluid and an inhaler
JPH06501080A (ja) * 1990-09-18 1994-01-27 ルーカス・インダストリーズ・パブリック・リミテッド・カンパニー 燃料噴射ノズル
US5333786A (en) * 1993-06-03 1994-08-02 Cummins Engine Company, Inc. Fuel injection device for an internal combustion engine
WO1994029589A1 (fr) * 1993-06-15 1994-12-22 Invent Engineering Pty. Limited Injecteur de carburant a detection de position
DE19633260A1 (de) * 1996-08-17 1998-02-19 Bosch Gmbh Robert Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors
DE10026286A1 (de) * 2000-05-26 2001-12-13 Orange Gmbh Einspritzventil zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine
WO2002016757A1 (fr) * 2000-08-21 2002-02-28 Volvo Lastvagnar Ab Dispositif detecteur de la position d'une aiguille
DE10146781B4 (de) * 2001-09-22 2015-02-12 Robert Bosch Gmbh Verfahren und Vorrichtung zur Überwachung der Ansteuerung eines Stellelements
DE10319329A1 (de) * 2003-04-29 2004-11-25 Siemens Ag Einspritzventil mit Sitzkontaktschalter
CN1324233C (zh) * 2003-09-08 2007-07-04 金剑 一种能够承受高负荷的喷油器
EP1559903B1 (fr) * 2004-01-28 2008-12-10 Continental Automotive Italy S.p.A. Injecteur de carburant avec aiguille déformable
CN100489300C (zh) * 2007-01-15 2009-05-20 金剑 一种新型双弹簧喷油器
FR3024183B1 (fr) * 2014-07-22 2019-07-26 Delphi Technologies Ip Limited Injecteur de carburant

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU182356A1 (ru) * 1964-06-11 1966-07-13 М. Г. Сандомирский Способ определения начала открытия клапана
DE2305114A1 (de) * 1973-02-02 1974-08-08 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer brennkraftmaschinen
US4111178A (en) * 1976-11-08 1978-09-05 General Motors Corporation Ignition system for use with fuel injected-spark ignited internal combustion engines
US4181010A (en) * 1978-06-29 1980-01-01 General Motors Corporation Injection timing nozzle
DE2925187A1 (de) * 1979-06-22 1981-01-08 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
FR2466630B1 (fr) * 1979-10-05 1985-06-28 Weber Spa Injecteur a actionnement electromagnetique, pour moteurs a combustion interne

Also Published As

Publication number Publication date
DE3029721A1 (de) 1982-03-04
JPS5752672A (en) 1982-03-29
EP0045530A3 (en) 1982-06-23
DE3165816D1 (en) 1984-10-11
JPS6358259B2 (fr) 1988-11-15
US4398670A (en) 1983-08-16
EP0045530A2 (fr) 1982-02-10

Similar Documents

Publication Publication Date Title
EP0045530B1 (fr) Soupape injectrice de combustible pour moteurs à combustion
EP0282480B1 (fr) Injecteur de carburant pour moteurs a combustion interne
DE19828848A1 (de) Brennstoffeinspritzventil mit integrierter Zündkerze
DE10122353B4 (de) Brennstoffeinspritzventil
EP1307648B1 (fr) Soupape d'injection de carburant
DE3117779C2 (fr)
EP0020888B1 (fr) Injecteur de combustible pour moteurs à combustion interne
DE2922503A1 (de) Kraftstoffeinspritzeinrichtung
DE10118164B4 (de) Brennstoffeinspritzventil
DE19541508A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10341335B4 (de) Anordnung mit Einspritzventil und einer Hülse als Druckübertragungsmittel
EP0447502B1 (fr) Soupape d'injection de carburant
EP0099991B1 (fr) Buse d'injection de carburant pour moteurs à combustion interne
DE2949326A1 (de) Kraftstoffeinspritzeinrichtung
EP0300198A1 (fr) Buse d'injection de combustible pour moteur à combustion interne
DE10124743A1 (de) Brennstoffeinspritzventil
DE3130238A1 (de) "drucksensor fuer brennkraftmaschinen"
EP0042915B1 (fr) Soupape d'injecteur de combustible pour moteur à combustion
EP0444053B1 (fr) Injecteur de carburant pour moteurs a combustion interne
DE3938551A1 (de) Kraftstoff-einspritzduese fuer brennkraftmaschinen
WO1992005363A1 (fr) Gicleurs d'injection de carburant
DE10132450A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
EP0216789A1 (fr) Buse d'injection de carburant pour moteur a combustion interne
EP0373466B1 (fr) Injecteur de carburant pour moteurs à combustion interne
DE19649812A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen

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

17P Request for examination filed

Effective date: 19810403

AK Designated contracting states

Designated state(s): DE FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 3165816

Country of ref document: DE

Date of ref document: 19841011

ET Fr: translation filed
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
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900331

Year of fee payment: 10

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

Ref country code: FR

Payment date: 19900426

Year of fee payment: 10

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

Ref country code: DE

Payment date: 19900626

Year of fee payment: 10

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

Ref country code: GB

Effective date: 19910403

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19911230

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

Ref country code: DE

Effective date: 19920201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST