EP1117928A1 - Buse d'injection de carburant - Google Patents

Buse d'injection de carburant

Info

Publication number
EP1117928A1
EP1117928A1 EP99969475A EP99969475A EP1117928A1 EP 1117928 A1 EP1117928 A1 EP 1117928A1 EP 99969475 A EP99969475 A EP 99969475A EP 99969475 A EP99969475 A EP 99969475A EP 1117928 A1 EP1117928 A1 EP 1117928A1
Authority
EP
European Patent Office
Prior art keywords
injection
nozzle
injection holes
tip
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.)
Granted
Application number
EP99969475A
Other languages
German (de)
English (en)
Other versions
EP1117928B1 (fr
Inventor
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 EP1117928A1 publication Critical patent/EP1117928A1/fr
Application granted granted Critical
Publication of EP1117928B1 publication Critical patent/EP1117928B1/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
    • F02M61/16—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
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • the invention relates to a fuel injection nozzle for internal combustion engines of the type mentioned in the preamble of patent claim 1.
  • Such injection nozzles are generally used in particular in direct-injection internal combustion engines.
  • the injection nozzle In the injection system of an internal combustion engine with fuel injection, particularly in the case of direct fuel injection, the injection nozzle has the task of supplying the combustion chamber of the engine with fuel in a targeted and metered manner.
  • the type of fuel preparation by the injection nozzle and the course of the injection process have a significant influence on the combustion in the combustion chamber.
  • a fuel injector essentially consists of two parts, the nozzle body and the nozzle needle.
  • the nozzle needle is inserted into the nozzle body so as to be axially movable.
  • a number of injection holes are formed radially all round, which are closed or released by the movable nozzle needle, for which purpose a cone at the front end of the nozzle needle on a conical sealing surface in the Tip of the nozzle body is pressed or lifts from this sealing surface.
  • a free space is provided between the front part of the nozzle needle and the inner wall of the nozzle body.
  • Common rail injection systems are systems in which the fuel is conveyed by a high pressure pump into a pressure accumulator common to all cylinders of the engine, from which the injection valves on the individual cylinders are supplied.
  • the pre-injection (pilot injection) of a very small amount of fuel before the actual injection (main injection) improves the combustion process in such systems, particularly with regard to noise and exhaust gas behavior. Due to the small amount of fuel, the nozzle needle lifts very little from its seat in the nozzle body, the conical sealing surface, during the pre-injection. Centering errors therefore have a particularly strong effect.
  • the invention has for its object to design the above-mentioned injection nozzle so that the fuel is always injected with the intended uniform distribution into the combustion chamber of the internal combustion engine.
  • the invention is therefore characterized by a cylindrical recess in the interior of the nozzle body in the area of the injection holes.
  • This annular circumferential recess is that the transition from the interior of the nozzle body to the respective injection hole is no longer so is sharp-edged and thus the fuel is fed into the injection holes with less turbulence.
  • this special shape has the advantage that an annular channel is formed around the cone at the tip of the nozzle needle, which enables the injection holes to be supplied with fuel evenly when the nozzle needle is lifted, even if the nozzle needle is not exactly centered. This advantage is particularly important when injecting small amounts of fuel, such as during pre-injection.
  • the drawing shows the tip of a fuel injector in section.
  • the substantially conical tip 10 of the nozzle body 12 of a fuel injection nozzle which projects into the combustion chamber of an internal combustion engine, is shown enlarged in section.
  • Injection holes 14 are formed in the tip 10 radially circumferentially at a certain angle (to the axis of the nozzle body 12). Through the row of injection holes 14, the fuel is injected under pressure m into the combustion chamber of the internal combustion engine under pressure m when the injection nozzle m is open, whereby the arrangement of the injection holes 14 determines the atomization pattern of the fuel.
  • a nozzle needle 20 is arranged axially movably in the nozzle body 12 of the injection nozzle.
  • the nozzle needle 20 has a cone 22 at its tip, with which, when the injection nozzle is closed, it bears against a conical sealing surface 16 m of the tip 10 of the nozzle body 12 in the area of the injection holes 14 and in particular in the direction of flow of the fuel above it.
  • the conical sealing surface 16 forms a seat for the cone 22, so that when the inlet is closed, No fuel reaches the injection holes 14 from the interior 18 between the nozzle needle 20 and the nozzle body 12.
  • Tip 10 of the nozzle body 12 worked out in a cylindrical manner in such a way that a cylindrical recess 30 is formed in the tip 10.
  • the cylindrical recess 30 runs in the area of the injection holes 14 and in the area of the conical sealing surface 16 in an annular manner around the cone 22 of the nozzle needle 20, the conical sealing surface 16 above the injection holes 14 being maintained at least to such an extent that the seal is secured when the injection nozzle is closed is.
  • the recess 30 has essentially the shape of a circular cylinder around the axis of the nozzle body 12.
  • the cylinder jacket 32 of the recess 30 runs essentially parallel to the axis of the nozzle body 12.
  • the cover surface 34 of the circular cylinder adjoining the cylinder jacket can be a flat circular surface, so that the angle between the cylinder jacket 32 and the top surface 34 is 90 °.
  • the top surface 34 can also be formed by an obtuse-angled, flat cone, so that the angle between the cylinder jacket 32 and the top surface 34 is more than 90 °.
  • the annular circumferential, cylindrical recess 30 on the inside of the tip 10 can be formed by any suitable method, for example by drilling, grinding, milling, an erosion method such as die sinking EDM, laser cutting and the like.
  • the interior of the nozzle body 12 m of the otherwise essentially conical tip 10 m of the area surrounding the injection holes 14 is cylindrical.
  • the injection holes 14 can be arranged in the region of the corner between the cylinder jacket 32 and the top surface 34 of the circular cylinder forming the recess 30, as shown in the drawing, or they can be further above in the area of the cylinder jacket 32 at a distance from the corner between the cylinder jacket 32 and the top surface 34, from the inside of the nozzle body 12 to the outside. It is also possible for the injection holes 14 to open into the cylindrical recess 30 in the area of the top surface 34.
  • the recess 30 in any case reduces the angle that the individual injection holes 14 form with the inner wall of the tip 10 of the nozzle body 12. While the angle between the axis of the individual injection holes 14 and the conical inner wall of the tip 10 without the recess 30 is 90 ° and often even more acute, i.e. is smaller than 90 °, the angle between the individual injection holes 14 and the inner wall of the recess 30 is considerably larger than 90 ° and thus rather obtuse. The transition between the interior of the nozzle body 12 and the individual injection holes 14 is therefore less sharp-edged and there is less turbulence when the fuel is introduced into the injection holes.
  • cylindrical recess 30 around the cone 22 of the nozzle needle 20 forms an annular channel which, when the nozzle needle 20 is lifted off at the beginning of the injection and during the injection, also in the event of centering errors with respect to the nozzle needle 20, ensures a uniform supply of fuel to the injection holes 14 and thus ensures an even atomization of the fuel.

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

L'invention concerne une buse d'injection de carburant destinée à l'injection de carburant dans la chambre à combustion d'un moteur à combustion interne. Cette buse comprend un corps (12) doté d'une pointe (10) pourvue d'une série de trous d'injection (14) de dispositif radiale et d'une aiguille d'injection (20) qui est axialement mobile dans le corps (12). Un cône (22) à la pointe de l'aiguille d'injection (20) libère et bloque, de façon sélective, le passage de carburant par les trous (14). Le corps (12) de la buse d'injection présente un évidement cylindrique (30) dans la pointe (10) dans la zone des trous d'injection (14).-
EP99969475A 1998-09-23 1999-09-16 Buse d'injection de carburant Expired - Lifetime EP1117928B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19843616 1998-09-23
DE19843616A DE19843616B4 (de) 1998-09-23 1998-09-23 Kraftstoffeinspritzdüse
PCT/DE1999/002961 WO2000017514A1 (fr) 1998-09-23 1999-09-16 Buse d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1117928A1 true EP1117928A1 (fr) 2001-07-25
EP1117928B1 EP1117928B1 (fr) 2002-11-27

Family

ID=7881962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99969475A Expired - Lifetime EP1117928B1 (fr) 1998-09-23 1999-09-16 Buse d'injection de carburant

Country Status (3)

Country Link
EP (1) EP1117928B1 (fr)
DE (2) DE19843616B4 (fr)
WO (1) WO2000017514A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018033460A1 (fr) * 2016-08-19 2018-02-22 Robert Bosch Gmbh Injecteur de carburant

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10050704A1 (de) * 2000-10-13 2003-02-20 Siemens Ag Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine
DE10149277A1 (de) 2001-10-05 2003-04-24 Siemens Ag Kraftstoffeinspritzventil
DE10247958A1 (de) 2002-10-15 2004-04-29 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung für eine Brennkraftmaschine
DE102004026711B4 (de) 2004-05-28 2009-10-08 Airbus Deutschland Gmbh Flugzustands-Sensor für elektronische Komponenten zum Einsatz in Flugzeugen, Verfahren zur Steuerung elektronischer Komponenten an Bord von Flugzeugen und elektronische Komponente
US20070200011A1 (en) * 2006-02-28 2007-08-30 Caterpillar Inc. Fuel injector having nozzle member with annular groove
JP4985661B2 (ja) 2008-03-27 2012-07-25 株式会社デンソー 燃料噴射弁
CH704964A1 (de) * 2011-05-16 2012-11-30 Liebherr Machines Bulle Sa Düse.
FR3057623B1 (fr) * 2016-10-14 2020-12-25 Delphi Int Operations Luxembourg Sarl Membre de vanne d'un injecteur de carburant
JP6899756B2 (ja) * 2017-11-17 2021-07-07 日立Astemo株式会社 燃料噴射弁
DE102017221748A1 (de) * 2017-12-04 2019-06-06 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1212352B (de) * 1960-02-20 1966-03-10 Orange G M B H L Brennstoff-Einspritzventil mit brennstoff-gesteuerter Ventilnadel
EP0067143A1 (fr) * 1981-06-10 1982-12-15 Friedmann & Maier Aktiengesellschaft Buse d'injection de carburant
GB8410749D0 (en) * 1984-04-26 1984-05-31 Lumber P M P Fuel injection nozzles
GB2223270A (en) * 1988-07-26 1990-04-04 Lucas Ind Plc I.C. engine fuel infection nozzle
DE4214646A1 (de) * 1992-05-02 1993-11-04 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer vor- und haupteinspritzung
DE4336972A1 (de) * 1993-10-29 1995-05-04 Bosch Gmbh Robert Kraftstoff-Einspritzdüse für Brennkraftmaschinen
JP3837774B2 (ja) * 1996-04-05 2006-10-25 株式会社ケーヒン 電磁式燃料噴射弁
JPH109095A (ja) * 1996-06-21 1998-01-13 Zexel Corp 燃料噴射ノズル

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0017514A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018033460A1 (fr) * 2016-08-19 2018-02-22 Robert Bosch Gmbh Injecteur de carburant
KR20190039277A (ko) * 2016-08-19 2019-04-10 로베르트 보쉬 게엠베하 연료 분사 노즐

Also Published As

Publication number Publication date
DE19843616B4 (de) 2006-07-06
EP1117928B1 (fr) 2002-11-27
WO2000017514A1 (fr) 2000-03-30
DE19843616A1 (de) 2000-03-30
DE59903588D1 (de) 2003-01-09

Similar Documents

Publication Publication Date Title
EP1076772B1 (fr) Injecteur de carburant pour moteur a combustion interne
DE3688753T2 (de) Steuereinrichtung für elektro-hydraulisch betätigte Kraftstoffeinspritzventile.
DE69806509T2 (de) Flache nadel für ein druckbeaufschlagtes dralleinspritzventil
DE2710138A1 (de) Mehrloch-einspritzduese
DE3808396A1 (de) Kraftstoffeinspritzventil
EP1129287B1 (fr) Buse d'injection pour moteurs a combustion interne avec pointeau pourvu d'une rainure annulaire
EP1117928B1 (fr) Buse d'injection de carburant
EP2753821A1 (fr) Fabrication avec usure optimisée de trous d'injection coniques
DE69712638T2 (de) Brennstoffeinspritzventil
DE2833431A1 (de) Kraftstoffeinspritzduese
EP1126160B1 (fr) Injecteur pour injecter du carburant dans un moteur à combustion interne
EP1346143B1 (fr) Soupape d'injection de carburant destinee a des moteurs a combustion interne
EP0064146A1 (fr) Système d'injection pour injecter deux combustibles par une seule buse d'injection
DE102016004584B4 (de) Verfahren zur Bearbeitung eines Einspritzventils zum Einspritzen von Kraftstoff in einen Verbrennungsmotor
EP1633973B1 (fr) Soupape d'injection de carburant
DE10050751B4 (de) Brennstoffeinspritzventil
DE3734587A1 (de) Kraftstoff-einspritzduese fuer brennkraftmaschinen
EP1599670B1 (fr) Buse d'injection a trou borgne et a siege perfore destinee a un moteur a combustion interne et presentant un cone de transition entre le trou borgne et le siege d'aiguille de buse
DE19914713C2 (de) Druckbeaufschlagte Stelleinrichtung
DE19843912B4 (de) Kraftstoffeinspritzdüse
DE102006000187A1 (de) Fluideinspritzventil
EP1895149A1 (fr) Injecteur destiné à injecter du carburant dans des chambres à combustion cylindriques de moteurs à combustion interne, en particulier injection à rampe commune
DE19823939C2 (de) Kraftstoff-Einspritzventil mit Führungshülse
DE10319535A1 (de) Durchflussratensteuerungsmodul, Kraftstoffeinspritzvorrichtung mit derselben und Herstellungsverfahren des Durchflussratensteuerungsmoduls
DE102016004503B3 (de) Brenngasinjektor

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: 20010305

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

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 20020304

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE

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: 59903588

Country of ref document: DE

Date of ref document: 20030109

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

Ref document number: 1117928E

Country of ref document: IE

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: 20030828

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

Ref country code: DE

Payment date: 20180930

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59903588

Country of ref document: DE