[go: up one dir, main page]

EP1408231B1 - Dispositif d'injection pour l'injection de carburant - Google Patents

Dispositif d'injection pour l'injection de carburant Download PDF

Info

Publication number
EP1408231B1
EP1408231B1 EP03103635A EP03103635A EP1408231B1 EP 1408231 B1 EP1408231 B1 EP 1408231B1 EP 03103635 A EP03103635 A EP 03103635A EP 03103635 A EP03103635 A EP 03103635A EP 1408231 B1 EP1408231 B1 EP 1408231B1
Authority
EP
European Patent Office
Prior art keywords
tip
injection
nozzle needle
nozzle
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.)
Expired - Lifetime
Application number
EP03103635A
Other languages
German (de)
English (en)
Other versions
EP1408231A1 (fr
Inventor
Grit Dr. Krüger
Eberhard Kull
Ferdinand Löbbering
Jürgen Schindlatz
Clemens Senghaas
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP1408231A1 publication Critical patent/EP1408231A1/fr
Application granted granted Critical
Publication of EP1408231B1 publication Critical patent/EP1408231B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the present invention relates to an injection device for injecting fuel, in particular in a combustion chamber of an internal combustion engine.
  • Injection devices for injecting fuel into a combustion chamber of an internal combustion engine are known from the prior art in various configurations, in particular in connection with storage injection systems, such as common rail systems for injection of diesel fuel into a combustion chamber of an engine.
  • Such injection devices comprise a nozzle needle guided in a nozzle body, wherein a sealing seat between the nozzle needle and the nozzle body is realized at a tip of the nozzle needle.
  • Below the sealing seat in the discharge direction usually more injection holes are arranged, which branch off from a blind hole on the nozzle body and through which the fuel is injected into the combustion chamber.
  • so-called micro-blind hole nozzles are known in which the space below the sealing seat, from which depart from the spray holes, is as small as possible.
  • an injection nozzle in which the nozzle needle has an annular groove in the region of the transition between the blind hole and the nozzle needle.
  • the annular groove is in the region of the injection or the injection holes.
  • This injection device for injecting fuel comprises a nozzle needle, which is arranged in a nozzle body, and a microsack hole formed in the nozzle body, in which at least one injection hole is formed.
  • the tip of the nozzle needle protrudes into the micro-blind hole in such a way that the tip is arranged in the axial direction of the nozzle needle at the level of the injection holes.
  • At the top of the nozzle needle at the height of the injection holes are recesses formed in the tip to ensure a minimum distance between the tip and the spray holes.
  • the injection device according to the invention for injecting fuel into a combustion chamber is designed such that a tip of a nozzle needle extends so deep into a micro-blind hole that the tip is arranged in the longitudinal direction of the nozzle needle at the height of the injection holes.
  • the tip of the nozzle needle is formed at the height of the injection holes in such a way that it is shaped in this area deviating from a conical basic shape such that a sufficient distance between the spray holes and the nozzle needle is present.
  • the minimum distance between the Spray holes and the nozzle needle tip both with a closed nozzle needle as well as a small needle lift available.
  • the distance is formed such that a surface which lies in a plane perpendicular to the nozzle needle between the outer circumference of the tip of the nozzle needle and each inwardly directed to the blind hole edge point of the injection hole is equal to about 0.200 mm 2 .
  • the tip is formed in the region near the injection hole in such a way that between the tip and the injection hole, an annular, area-like region with a cross-sectional area of 0.200 mm 2 is provided with non-actuated nozzle needle.
  • the annular surface lies in a plane which is perpendicular to the direction of movement of the nozzle needle and extends through the uppermost edge point of the or the injection holes.
  • a particularly good spray pattern is obtained when all spray holes of the injection device are arranged in a plane perpendicular to the direction of movement of the nozzle needle.
  • the tip of the nozzle needle in the region which is opposite to the spray holes provided with a recess, which are formed for example as a circumferential groove in the conical tip of the nozzle needle.
  • the recess may be formed, for example, by a, in particular stepped, paragraph in the tip of the nozzle needle in the region opposite the spray holes.
  • the tip of the nozzle needle is designed such that in the area opposite the spray holes a second conical Area is formed.
  • the angle of this second conical region to the central axis of the nozzle needle is greater than an angle of the tip of the nozzle needle, for example at a sealing seat of the needle.
  • Such a second conical region can be produced in a particularly simple manner, for example by grinding the nozzle needle. It should also be noted that, of course, a plurality of conical regions can successively form the tip of the nozzle needle, wherein the angle with respect to the central axis of the needle becomes larger, the closer it is at the end of the tip.
  • the present invention is particularly useful in storage injection systems, such as e.g. Common rail systems, used. According to the invention can thus be obtained despite the small blind hole volume, which usually leads to poor exhaust emissions, by the inventive design of the needle tip a good uniform distribution of Einstrahlmengen and a good jet pattern, resulting in low HC emissions. Thus, an improved mixture formation can be achieved in the combustion chamber, whereby a significant reduction of the exhaust emissions and also the consumption is obtained.
  • the injection device comprises in a known manner arranged in a nozzle body 1 nozzle needle 2.
  • the nozzle needle 2 is seated on a sealing seat 4 on the nozzle body 1 and gives the sealing seat, for example by driving by means of a piezoelectric actuator in a known manner by movement along the longitudinal axis XX of the nozzle needle 2 free or closes this to start an injection or to end.
  • the nozzle needle 2 has a substantially conically formed tip 3.
  • the tip 3 is formed by a first conical region 5, a second conical region 6 and a third conical region 7.
  • the conical regions 5, 6, 7 are formed such that they each have a different angle to the longitudinal axis X-X.
  • the first conical portion 5 has the most acute angle with respect to the axis X-X
  • the third conical portion 7 located at the end of the tip 3 has the most obtuse angle with respect to the axis X-X (see Fig. 1).
  • a plurality of spray holes 8, more precisely, as shown in Figure 2 six injection holes 8 are formed in a known manner in a known manner.
  • the injection holes 8 lie on a plane perpendicular through the longitudinal axis X-X of the nozzle needle. 2
  • the second conical region 6 lies opposite a top edge point 9 and the spray hole 8 when the nozzle needle 2 is closed and with a smaller needle stroke up to approximately 80 .mu.m. More precisely, the uppermost edge point 9 lies in a plane E which is perpendicular to the longitudinal axis XX of the nozzle needle 2 and the uppermost edge point 9 the injection hole 8 runs. This results between the uppermost edge point 9 and the tip 3 of the nozzle needle an annular surface A.
  • the annular surface A is shown in detail in the sectional view along the plane E shown in FIG.
  • the annular surface A has a size of equal to about 0.200 mm 2 .
  • the tip 3 of the nozzle needle is formed in the region opposite to the injection hole 8 by an approximately parabolic tapered portion 11 in the second embodiment.
  • This tapering region 11 of the tip 3 is designed such that between the uppermost edge point 9 of the injection hole 8 and the tapered portion 11, an area A with a cross section of about 0.200 mm 2 results.
  • the tapered region can also be produced, for example, by means of grinding.
  • the second embodiment corresponds to the first embodiment, so that reference can be made to the description given there.

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 (7)

  1. Dispositif d'injection pour l'injection de carburant, comprenant une aiguille d'injection (2) placée dans un corps de buse (1), avec un micro-trou borgne (10) situé dans le corps de buse (1), dans lequel se trouve au moins un orifice d'injection (8), la pointe (3) de l'aiguille d'injection (2) étant introduite dans le micro-trou borgne (10) de façon à se placer dans l'axe (X-X) de l'aiguille d'injection à la hauteur des orifices d'injection (8), des évidements étant formés à la pointe (3) de l'aiguille (2) à hauteur des orifices d'injection (8), afin de garantir un écart minimum entre la pointe (3) et les orifices d'injection (8), caractérisé en ce que l'écart minimum est constitué d'une surface (A) verticale par rapport à un plan (E) orienté dans l'axe (X-X), la surface (A) étant d'environ 0,200 mm2 entre l'extrémité de la pointe (3) et tous les points du bord interne des orifices d'injection (8) avec une aiguille d'injection fermée.
  2. Dispositif d'injection selon la revendication 1, caractérisé en ce que le plan (E) passe par le point supérieur du bord (9) de l'orifice (8).
  3. Dispositif d'injection selon l'une des précédentes revendications, caractérisé en ce que tous les orifices d'injection se trouvent dans un plan vertical par rapport à l'axe (X-X).
  4. Dispositif d'injection selon l'une des précédentes revendications, caractérisé en ce que la pointe (3) de l'aiguille d'injection au niveau de la zone (E) présente une zone échancrée (6 ; 11).
  5. Dispositif d'injection selon la revendication 4, caractérisé en ce que la zone échancrée est constituée d'une rainure circulaire.
  6. Dispositif d'injection selon la revendication 4, caractérisé en ce que la zone échancrée est constituée en forme d'escalier.
  7. Dispositif d'injection selon l'une des précédentes revendications, caractérisé en ce que la pointe (3) de l'aiguille d'injection au niveau des orifices d'injection comporte une zone conique (6), un angle entre cette zone conique (6) et l'axe (X-X) de l'aiguille d'injection étant plus ouvert qu'un angle par rapport à la pointe (3) de l'aiguille au niveau d'un siège (4) de l'aiguille sur le corps de buse (1).
EP03103635A 2002-10-07 2003-10-01 Dispositif d'injection pour l'injection de carburant Expired - Lifetime EP1408231B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10246693 2002-10-07
DE10246693A DE10246693A1 (de) 2002-10-07 2002-10-07 Einspritzvorrichtung zum Einspritzen von Kraftstoff

Publications (2)

Publication Number Publication Date
EP1408231A1 EP1408231A1 (fr) 2004-04-14
EP1408231B1 true EP1408231B1 (fr) 2006-12-13

Family

ID=32010337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03103635A Expired - Lifetime EP1408231B1 (fr) 2002-10-07 2003-10-01 Dispositif d'injection pour l'injection de carburant

Country Status (4)

Country Link
US (1) US7017840B2 (fr)
EP (1) EP1408231B1 (fr)
JP (1) JP2004132376A (fr)
DE (2) DE10246693A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005025135A1 (de) * 2005-06-01 2006-12-07 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
US7578450B2 (en) * 2005-08-25 2009-08-25 Caterpillar Inc. Fuel injector with grooved check member
US7360722B2 (en) * 2005-08-25 2008-04-22 Caterpillar Inc. Fuel injector with grooved check member
EP2369166B1 (fr) * 2010-03-22 2017-12-13 Delphi International Operations Luxembourg S.à r.l. Buse à injection
JP2011256837A (ja) * 2010-06-11 2011-12-22 Toyota Motor Corp 燃料噴射弁
DE102010032050B4 (de) * 2010-07-23 2017-12-21 Continental Automotive Gmbh Düsenkörper mit Sackloch
DE102011118299A1 (de) * 2011-11-10 2013-05-16 Daimler Ag Einspritzdüse
JP6354519B2 (ja) * 2014-10-23 2018-07-11 株式会社デンソー 燃料噴射弁
JP6254122B2 (ja) 2015-06-24 2017-12-27 株式会社デンソー 燃料噴射ノズル
GB2552673B (en) * 2016-08-02 2020-02-19 Delphi Tech Ip Ltd SCR doser spray atomization
DE102019210631A1 (de) * 2019-07-18 2021-01-21 Robert Bosch Gmbh Kraftstoffinjektor für Brennkraftmaschinen

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882068A (ja) * 1981-11-09 1983-05-17 Nissan Motor Co Ltd 燃料噴射ノズル
JP2819702B2 (ja) * 1989-12-12 1998-11-05 株式会社デンソー 燃料噴射弁
US5221046A (en) * 1991-09-10 1993-06-22 Diesel Technology Company Methanol fueled diesel internal combustion engine fuel injector nozzle
GB9425652D0 (en) * 1994-12-20 1995-02-22 Lucas Ind Plc Fuel injection nozzle
US5725157A (en) * 1995-09-06 1998-03-10 Buescher, Alfred J. Injector nozzle valve
DE19547423B4 (de) 1995-12-19 2008-09-18 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19931891A1 (de) 1999-07-08 2001-01-18 Siemens Ag Kraftstoffeinspritzventil für eine Brennkraftmaschine
DE19942370A1 (de) * 1999-09-04 2001-03-22 Bosch Gmbh Robert Einspritzdüse für Brennkraftmaschinen mit einer Ringnut in der Düsennadel
DE10000501A1 (de) * 2000-01-08 2001-07-19 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10000574A1 (de) * 2000-01-10 2001-07-19 Bosch Gmbh Robert Kraftstoff-Einspritzdüse
DE10002366A1 (de) 2000-01-20 2001-08-02 Siemens Ag Warmfeste Kraftstoffeinspritzdüse
IT1319988B1 (it) * 2000-03-21 2003-11-12 Fiat Ricerche Spina di chiusura di un ugello in un iniettore di combustibile permotori a combustione interna.
DE10031264A1 (de) * 2000-06-27 2002-01-17 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10031265A1 (de) * 2000-06-27 2002-01-10 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen

Also Published As

Publication number Publication date
JP2004132376A (ja) 2004-04-30
DE50305940D1 (de) 2007-01-25
EP1408231A1 (fr) 2004-04-14
US7017840B2 (en) 2006-03-28
US20040112988A1 (en) 2004-06-17
DE10246693A1 (de) 2004-04-15

Similar Documents

Publication Publication Date Title
WO1999058844A1 (fr) Injecteur de carburant pour moteur a combustion interne
EP1408231B1 (fr) Dispositif d'injection pour l'injection de carburant
EP2521853B1 (fr) Soupape d'injection de combustible
DE19958126B4 (de) Kraftstoffeinspritzdüse
DE2814999A1 (de) Kraftstoff-einspritzduese fuer brennkraftmaschinen
EP0116864A2 (fr) Injecteur de carburant pour moteurs à combustion interne
EP1761701B1 (fr) Systeme d'injection de carburant
EP2898214B1 (fr) Système d'injection de carburant d'un moteur à combustion interne
WO2017114634A1 (fr) Soupape d'injection de carburant
EP3014104B1 (fr) Ensemble buse pour un injecteur de carburant et injecteur de carburant
DE102017218224A1 (de) Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil
DE19843912B4 (de) Kraftstoffeinspritzdüse
WO2015052031A1 (fr) Corps de gicleur pour soupape d'injection et soupape d'injection
DE10349778A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
EP1565650B1 (fr) Dispositif d'injection pour l'injection de carburant
AT3983U2 (de) Einspritzdüse für eine direkt einspritzende brennkraftmaschine
WO1987005077A1 (fr) Buse d'injection de carburant d'un moteur a combustion
WO2016102239A1 (fr) Corps de buse et injecteur de fluide
DE3300670A1 (de) Kraftstoffeinspritzduese
DE102015007231B4 (de) Kraftstoffinjektor
DE10153629A1 (de) Verfahren zum Einspritzen von Brennstoff
WO2021122053A1 (fr) Injecteur de carburant pour un moteur à combustion interne et moteur à combustion interne comprenant un injecteur de carburant
DE102019105537A1 (de) Hülse zum Durchleiten von Wasser um einen Injektor in einen Brennraum
DE102018222702A1 (de) Brennstoffeinspritzventil
DE102018221833A1 (de) Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil

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 BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20041014

AKX Designation fees paid

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20050128

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: 20061213

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50305940

Country of ref document: DE

Date of ref document: 20070125

Kind code of ref document: P

ET Fr: translation filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20061213

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: 20070914

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061213

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 50305940

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50305940

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

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

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50305940

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: VITESCO TECHNOLOGIES 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: 20211031

Year of fee payment: 19

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

Ref country code: FR

Payment date: 20211021

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50305940

Country of ref document: DE

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: 20221031

Ref country code: DE

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

Effective date: 20230503