EP1332283A1 - Aiguille d'injection presentant une pointe d'aiguille elastique - Google Patents

Aiguille d'injection presentant une pointe d'aiguille elastique

Info

Publication number
EP1332283A1
EP1332283A1 EP01992835A EP01992835A EP1332283A1 EP 1332283 A1 EP1332283 A1 EP 1332283A1 EP 01992835 A EP01992835 A EP 01992835A EP 01992835 A EP01992835 A EP 01992835A EP 1332283 A1 EP1332283 A1 EP 1332283A1
Authority
EP
European Patent Office
Prior art keywords
needle
injection
needle tip
connecting piece
injection needle
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
EP01992835A
Other languages
German (de)
English (en)
Other versions
EP1332283B1 (fr
Inventor
Alwin Perras
Thomas Hofmann
Hakan Yalcin
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1332283A1 publication Critical patent/EP1332283A1/fr
Application granted granted Critical
Publication of EP1332283B1 publication Critical patent/EP1332283B1/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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
    • 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
    • F02M61/047—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 being formed by deformable nozzle parts, e.g. flexible plates or discs with fuel discharge orifices
    • 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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the invention relates to an injection needle according to the preamble of claim 1 and an injection valve with such an injection needle.
  • Injection needles have a wide variety of shapes, in particular in the area of the needle tip, with which the fuel flow is influenced. Furthermore, a sealing surface is formed on the needle tip, which is assigned to a sealing seat of a nozzle body.
  • the sealing seat is at
  • the object of the invention is to provide a simply constructed injection needle with which wear of the sealing seat is reduced.
  • An essential advantage of the invention is that the needle tip is connected to the needle shaft via an elastic element.
  • the elastic element dampens the impulse with which the injection needle hits the sealing seat with the needle tip, so that less stress is placed on the sealing seat.
  • Further advantageous developments of the invention are specified in the dependent claims.
  • a preferred embodiment of the elastic element consists in forming a center-symmetrically arranged connecting piece between the needle shaft and the needle tip.
  • the needle tip, the connector and the needle shaft are integrally formed. In this way, a particularly simple embodiment of the invention is provided.
  • the connecting piece is preferably designed in such a way that an annular circumferential groove is made in the injection needle, which defines the connecting piece.
  • a preferred embodiment of the invention consists in forming the connecting piece with a diameter of 0.5 to 1.5 mm.
  • the groove being at a distance from a sealing edge of the needle tip which is in the range from 0 to 1 mm.
  • the groove has a U-shaped cross section.
  • a U-shaped groove is easy to make so that the injection needle can be manufactured inexpensively.
  • Fig. 2 shows a needle tip with a needle shaft
  • Fig. 3 shows another embodiment of the injection needle.
  • FIG. 1 shows an injection valve 1 which has a nozzle body 2.
  • An injection needle 10 is movably guided in the nozzle body 2.
  • the injection needle 10 has a needle tip 11 with a sealing surface 6.
  • the sealing surface 6 lies in the closed state of the injection valve 1 with a sealing edge 22 on a sealing seat 5, which is formed above the injection holes 4 on the inner wall of the nozzle body 2.
  • An injection space 3 is formed between the injection needle 10 and the nozzle body 2 and is connected to an inlet bore 8.
  • the injection chamber 3 is supplied with fuel via the inlet bore 8.
  • the inlet bore 8 is connected to a fuel reservoir, which holds fuel at a predetermined pressure.
  • the actuator 7 is operatively connected to the injection needle 10 and determines the position of the injection needle 10 as a function of the control via the connections 9. If an injection is to take place, the actuator 7 is actuated in a corresponding manner and the injection needle 10 is lifted from the sealing seat 5 by the actuator 7. This creates a hydraulic connection between the injection chamber 3 and the injection holes 4. As a result, fuel is dispensed via the injection holes 4.
  • the actuation of the actuator 7 is interrupted and the actuator 7 moves the injection needle 10 again with the sealing surface 6 onto the sealing seat 5, so that the hydraulic connection between the injection space 3 and the injection holes 4 is interrupted.
  • the injection needle 10 is subdivided into a needle shaft 12 and a needle tip 11, the needle tip 11 being connected to the needle shaft 12 via a connecting piece 13.
  • the needle tip 11 has a conical sealing surface 6, which is rotationally symmetrical to an axis of symmetry 14.
  • a conical sealing seat 5 is assigned to the sealing surface 6, which is also rotationally symmetrical to the axis of symmetry 14 on the inner wall of the nozzle body 2.
  • a difference angle A is formed between the sealing surface 6 and the sealing seat 5, so that a secure seal between the sealing seat 5 and the sealing surface 6 is ensured.
  • the sealing surface 6 lies above the injection holes 4 with the sealing edge 22 on the sealing seat 5 in a circumferential ring surface.
  • the needle shaft 12 merges from a first cylindrical section 15 into a second, conical section 16.
  • the second section 16 is followed by a third section 17, which is also cylindrical, but has a smaller cross section than the first section 15.
  • the third section 17 tapers again via a circumferential, annular groove 18 in a fourth section 19, which represents the connecting piece 13.
  • the cross section then widens starting from the fourth section 19 in a fifth section 20.
  • the fifth section 20 represents the upper part of the needle tip 11.
  • the needle tip 11 tapers in the conical shape of the sealing surface 6 to an end surface 21, which closes the needle tip 11.
  • the fifth section 20 and the third section 17 preferably have the same cross section.
  • the groove 18 preferably has a U-shape in cross section. However, other shapes of grooves 18 are also possible.
  • the connecting piece 13 is preferably arranged centrally symmetrically to the axis of symmetry 14 and preferably has a diameter D of 0.5 to 1.8 mm.
  • a preferred size for the diameter of the connecting piece 13 is in the range from 1.1 to 1.3 mm.
  • the width B of the groove 18 seen parallel to the axis of symmetry 14 preferably has a value of 0.1 to 1 mm. loading Particularly good properties were achieved with a groove width of 0.25 to 0.35 mm.
  • the groove 18 has a lower edge 23 on which the needle tip 11 tapers to the connecting piece 13.
  • the distance between the sealing edge 22 and the lower edge 23 is of particular importance since the distance essentially determines the elastic properties of the connection of the needle tip to the injection needle and thus the damping properties of the injection needle. Good damping properties are achieved with a distance Z of the lower edge 23 from the sealing edge 22 which is in the range from 0.1 to 1 mm.
  • the lower edge 23 preferably runs after a rounding perpendicular to the longitudinal axis of the injection needle.
  • An essential function of the groove 18 is to reduce the cross section of the connecting piece 13.
  • the maximum yield stress which is exerted by the needle tip 11 on the nozzle body 2 can be reduced by up to 50%.
  • Preferred values for a combination of the diameter D and the distance Z are for the diameter D from 1 to 1.3 mm and the distance Z from 0.1 to 1 mm.
  • the injection needle 10 of FIG. 2 is formed in one piece from the needle shaft 12, the connecting piece 13 and the needle tip 11.
  • the injection needle 10 is turned off Working steel S 652 or made of material 100 chrome 6.
  • the invention is not limited to the one-piece embodiment, but the needle shaft 12, the connecting piece 13 and the needle tip 11 can also be made of different materials, the connecting piece 13 with the needle shaft 12 and the needle tip 11 via suitable connecting surfaces or connecting means connected is .
  • the connecting piece 13 can be screwed into the needle shaft 12 and the needle tip 11 or welded to the needle shaft 12 and the needle tip 11.
  • the connecting piece 13 is preferably produced from a material which has more damping properties than the material of the needle shaft 12 and / or the material of the needle tip 11.
  • FIG. 3 shows a further embodiment of the injection needle, in which the lower edge 23 is guided up to a diameter D of the connecting piece 13.
  • the lower edge 23 merges into a radius of curvature R which is in the range from 0.15 to 0.4 mm.
  • a tangential truncated conical surface 24 adjoins the radius of curvature, which has an angle of 40 ° to 75 ° to the central axis of the injection needle.
  • the diameter of the injection needle continues to increase up to the diameter of the needle shaft 12.
  • the values for the distance Z and the diameter D are adjusted by a specialist together with the elastic properties of the material from which the injection needle is made.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

La présente invention concerne une aiguille d'injection présentant une pointe d'aiguille (11), qui est connectée de manière élastique à une tige d'aiguille (12) par l'intermédiaire d'une pièce de connexion. La connexion élastique permet d'amortir la force avec laquelle la pointe d'aiguille (11) percute un siège d'étanchéité correspondant (5), ce qui permet de réduire la contrainte exercée sur le siège d'étanchéité (5).
EP01992835A 2000-11-02 2001-10-30 Aiguille d'injection presentant une pointe d'aiguille elastique Expired - Lifetime EP1332283B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10054183 2000-11-02
DE10054183A DE10054183A1 (de) 2000-11-02 2000-11-02 Einspritznadel mit elastischer Nadelspitze
PCT/DE2001/004102 WO2002036961A1 (fr) 2000-11-02 2001-10-30 Aiguille d'injection presentant une pointe d'aiguille elastique

Publications (2)

Publication Number Publication Date
EP1332283A1 true EP1332283A1 (fr) 2003-08-06
EP1332283B1 EP1332283B1 (fr) 2006-06-07

Family

ID=7661811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01992835A Expired - Lifetime EP1332283B1 (fr) 2000-11-02 2001-10-30 Aiguille d'injection presentant une pointe d'aiguille elastique

Country Status (4)

Country Link
US (1) US20030213459A1 (fr)
EP (1) EP1332283B1 (fr)
DE (2) DE10054183A1 (fr)
WO (1) WO2002036961A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004096316A2 (fr) * 2003-04-24 2004-11-11 Medical Research Products-A, Inc. Dispositif pour administrer un medicament implantable presentant une encoche destinee a recevoir une aiguille
DE602004014854D1 (de) * 2003-07-15 2008-08-21 Delphi Tech Inc Einspritzventil
EP1522721B1 (fr) * 2003-10-06 2006-05-03 Delphi Technologies, Inc. Buse d'injection
JP2005226580A (ja) * 2004-02-13 2005-08-25 Denso Corp 燃料噴射装置
WO2005084274A2 (fr) * 2004-03-02 2005-09-15 Medical Research Products-A, Inc. Orifice de reception de l'aiguille d'un dispositif medical
JP6059915B2 (ja) * 2012-08-27 2017-01-11 日立オートモティブシステムズ株式会社 燃料噴射弁
DE102016203028A1 (de) * 2016-02-26 2017-08-31 Bayerische Motoren Werke Aktiengesellschaft Kraftstoffinjektor
FR3057623B1 (fr) * 2016-10-14 2020-12-25 Delphi Int Operations Luxembourg Sarl Membre de vanne d'un injecteur de carburant
CN107143452B (zh) * 2017-07-17 2024-03-08 辽阳新风科技有限公司 一种油嘴偶件、喷油器及汽车
JP2022088969A (ja) * 2020-12-03 2022-06-15 株式会社ジャパンエンジンコーポレーション 燃料噴射弁および舶用内燃機関

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711350A1 (de) * 1977-03-16 1978-09-21 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer brennkraftmaschinen
JPS62162768A (ja) * 1986-01-10 1987-07-18 Nippon Denso Co Ltd 燃料噴射弁
US5353992A (en) * 1993-08-30 1994-10-11 Chrysler Corporation Multi-hole injector nozzle tip with low hydraulic plume penetration and large cloud-forming properties
EP0641931A1 (fr) * 1993-09-06 1995-03-08 Servojet Electronic Systems, Ltd. Système d'injection de combustible à accumulateur
US5636827A (en) * 1994-09-20 1997-06-10 Siemens Automotive Corporation Notched needle bounce eliminator
JP3213515B2 (ja) * 1995-07-14 2001-10-02 三菱自動車工業株式会社 二段開弁圧式燃料噴射弁
GB9616851D0 (en) * 1996-08-10 1996-09-25 Lucas Ind Plc Injector
DE19855568A1 (de) * 1998-12-02 2000-06-08 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0236961A1 *

Also Published As

Publication number Publication date
US20030213459A1 (en) 2003-11-20
DE50110071D1 (de) 2006-07-20
EP1332283B1 (fr) 2006-06-07
DE10054183A1 (de) 2002-05-29
WO2002036961A1 (fr) 2002-05-10

Similar Documents

Publication Publication Date Title
DE3802648C2 (fr)
DE4438462C1 (de) Hochdrucksteuerventil mit Druckhilfsventildichtung
DE2709386A1 (de) In einer richtung wirkender durchflussbegrenzer
DE3307554A1 (de) Elektrisch regelbares druckreduzierventil
DE102014110246A1 (de) Stellarmatur
EP0681128A1 (fr) Electrovanne
DE102006017006A1 (de) Treibstoff-Einspritzventilvorrichtung
EP1700058B1 (fr) Soupape de commande d'un fluide
EP0553224B1 (fr) Soupape a haute pression
DE19712922B4 (de) Brennstoffeinspritzventil
DE102013009650A1 (de) Ventil
EP1332283B1 (fr) Aiguille d'injection presentant une pointe d'aiguille elastique
DE2926499A1 (de) Bremsdrucksteuereinheit fuer fahrzeugbremsanlagen
EP0643244B1 (fr) Valve
DE102017110380A1 (de) Ablassventil für hohe Drücke
DE19949197A1 (de) Steuerglied eines Piezoventils
DE10256533B4 (de) Düse, insbesondere Zerstäubungsdüse für Ölbrenner
DE3819344A1 (de) Kraftstoffzerstaeubungs- und dosierventil fuer eine kraftstoffeinspritzvorrichtung eines verbrennungsmotors
WO2022063733A1 (fr) Soupape électromagnétique conçue en particulier pour des véhicules automobiles
DE3001538C2 (de) Entlüftungsvorrichtung für ein Ventil
EP1090240A1 (fr) Soupape a limitation de pression
DE102008055972B3 (de) Magnetventil
DE3018145C2 (de) Überdruckventil zum Absichern hydraulischer Grubenstempel
DE10016247B4 (de) Einspritzventil mit einer Dichtmembran
DE3420400A1 (de) Zwei-wege-sitzventil

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: 20030415

AK Designated contracting states

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

17Q First examination report despatched

Effective date: 20031204

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

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

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060607

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

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

Effective date: 20060613

REF Corresponds to:

Ref document number: 50110071

Country of ref document: DE

Date of ref document: 20060720

Kind code of ref document: P

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

Effective date: 20070308

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

Ref country code: FR

Payment date: 20091110

Year of fee payment: 9

Ref country code: GB

Payment date: 20091022

Year of fee payment: 9

Ref country code: IT

Payment date: 20091023

Year of fee payment: 9

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

Effective date: 20101030

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: 20101102

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110630

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: 20101030

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

Ref country code: IT

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

Effective date: 20101030

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 50110071

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50110071

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE

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

Ref country code: DE

Payment date: 20201031

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 50110071

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50110071

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: VITESCO TECHNOLOGIES GMBH, 30165 HANNOVER, DE