EP1407137B1 - Soupape d'injection de carburant pour moteur a combustion interne - Google Patents

Soupape d'injection de carburant pour moteur a combustion interne Download PDF

Info

Publication number
EP1407137B1
EP1407137B1 EP02740291A EP02740291A EP1407137B1 EP 1407137 B1 EP1407137 B1 EP 1407137B1 EP 02740291 A EP02740291 A EP 02740291A EP 02740291 A EP02740291 A EP 02740291A EP 1407137 B1 EP1407137 B1 EP 1407137B1
Authority
EP
European Patent Office
Prior art keywords
inlet opening
valve
injection
fuel
fuel injection
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
EP02740291A
Other languages
German (de)
English (en)
Other versions
EP1407137A1 (fr
Inventor
Ralf Heinecke
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 EP1407137A1 publication Critical patent/EP1407137A1/fr
Application granted granted Critical
Publication of EP1407137B1 publication Critical patent/EP1407137B1/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
    • F02M61/1806—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 is based on a fuel injection valve for internal combustion engines, as it corresponds to the preamble of claim 1.
  • a fuel injection valve for internal combustion engines, as it corresponds to the preamble of claim 1.
  • Such a fuel injection valve is known, for example, from document DE 199 01 057 A1 and has a valve body in which a pressure space which can be filled with fuel under pressure is formed.
  • At least one injection channel which connects the pressure chamber to the combustion chamber of the internal combustion engine, is formed on a valve seat formed in the pressure chamber.
  • a valve needle is arranged, which has a sealing surface and cooperates with the valve seat and in this way opens and closes the opening of the injection channel.
  • the injection channel is cylindrical in this case straight and has both a circular inlet opening and a circular outlet opening on. Due to the constant over the entire length cross-section of the injection channel, the implementation of the pressure in speed takes place exclusively at the inlet opening of the injection channel, so that there is relatively high flow losses.
  • EP 0 352 926 B2 discloses conical injection channels on a fuel injection valve in which the inlet opening and the outlet opening are circular, but the inlet opening has a significantly larger diameter than the outlet opening.
  • a plurality of injection channels are preferably distributed over the circumference of the fuel injection valve.
  • these injection channels have the disadvantage that with a possible enlargement of the inlet opening a reduction of the web width between the inlet openings is necessary, which leads to a reduction in the stability of the valve seat and thus possibly to material failure in this area by the valve needle during the closing movement impinges on the valve seat at high speed and thus exerts large forces on the valve seat.
  • the fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage that the implementation of pressure in speed does not occur exclusively at the inlet cross section of the injection channel, but also along the injection channel and that at the same time can change the cross section of the inlet opening of the injection channel, without that the web width between the inlet openings of the injection channels must be changed in a change in cross section of the inlet opening.
  • the inlet opening of the injection channel, which is arranged on the wall of the pressure chamber is formed as a slot. A change in the cross section of the inlet opening is already possible in that the longitudinal extent of the elongated hole is increased while maintaining the width.
  • the outlet opening of the injection channel is formed circular on the outside of the valve body. This results in a geometrically simple form a uniform reduction of the cross section of the injection channel from the inlet cross section to the outlet cross section.
  • the injection channel has a straight wall, through which the slot-shaped inlet opening is connected to the circular outlet opening.
  • Such an injection channel can be easily manufactured, since known standard methods, such as electroerodizing or manufacturing the injection channel by means of laser treatment, can be used.
  • the pressure space between the wall of a valve body formed in the bore and the valve needle is formed, wherein the longitudinal axis of the slot is aligned at least approximately in the direction of the central axis of the bore.
  • FIG. 1 shows a longitudinal section through a fuel injection valve according to the invention, only the part which is essential for the representation of the invention being shown.
  • a valve body 1 has a bore 3 which has a substantially conical valve seat 9 at its combustion chamber end.
  • a valve needle 5 is arranged, which is piston-shaped and which is guided with a combustion chamber facing away from section 15 in a guide portion 23 of the bore 3.
  • the valve needle 5 tapers to the combustion chamber to form a pressure shoulder 13 and merges at its combustion chamber end in a substantially conical valve sealing surface 7, which cooperates with the valve seat 9.
  • a device not shown in the drawing is provided by which a closing force is exerted on the valve member 5 in the direction of the valve seat 9, for example in the form of a spring.
  • This closing force brings the valve member 5 with the valve sealing surface 7 on the valve seat 9 to the system, so that the injection openings 11 are closed relative to the pressure chamber 19.
  • the hydraulic pressure of the fuel which is introduced via the inlet channel 25 into the pressure chamber 19, a hydraulic force on the pressure shoulder 13, which is directed against this closing force on the valve needle 5.
  • valve needle 5 can be moved in the longitudinal direction, so that the valve sealing surface 7 lifts off the valve seat 9 and the injection openings 11 releases or closes again in the reverse movement.
  • FIG. 2 shows an enlargement of FIG. 1 in the detail denoted by II.
  • the injection channel 11 has an inlet opening 111 and an outlet opening 211.
  • the wall 311 of the injection channel 11 narrows from the inlet opening 111 to the outlet opening 211, wherein the wall 311 of the injection channel 11 is straight.
  • FIG. 3 shows a representation of the injection channel 11 together with some geometric variables.
  • the inlet opening 111 has the shape of a slot and has a longitudinal axis 17, which represents the axis of symmetry in the longitudinal direction of the oblong hole.
  • the slot consists of two semicircles, having a diameter d, and a central portion having a length c, and the semicircles connects to each other.
  • the length c thus corresponds to the distance between the centers of the two semicircles.
  • the opposite sides of the central portion are straight and parallel to each other.
  • the outlet opening 211 is circular, wherein the injection channel 11 is formed by a straight wall 311, which connects the inlet opening 111 with the outlet opening 211.
  • Typical dimensions of the oblong hole are a diameter d of the two semicircles of 0.15 mm to 0.17 mm and a distance of the centers of the semicircles c from 0.025 mm to 0.045 mm.
  • the diameter of the outlet opening 211 is in this case identical to the diameter of the semicircles of the inlet opening 111 forming the elongated hole.
  • the resulting at these dimensions angle ⁇ are in the range of 1.4 ° to 2.6 °.
  • the orientation of the inlet opening 111 forming slot is in the present embodiment so that the longitudinal axis 17 with the central axis 4 of the bore 3 spans a plane, so that the slot is aligned in the direction of the central axis 4.
  • the longitudinal axis 17 of the oblong hole is slightly tilted with respect to the central axis 4 of the bore 3, for example to take into account a fuel frictional flow in the region of the valve seat 9, which leads to a better inflow of the fuel into the injection channel 11 ,
  • the outlet cross-section of the injection channel 11 may also be provided to make the outlet cross-section of the injection channel 11 as a slot. Although this reduces the cross-section of the injection channel 11 from the inlet opening to the outlet opening, however, the centers of the semicircles do not coincide at the outlet opening. It can also be provided that the longitudinal axes 17 of the inlet opening and outlet opening are not parallel to each other, but tilted to each other, so that there is a twist of the fuel flowing through the injection channel 11.

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 (3)

  1. Injecteur de carburant pour moteurs à combustion interne, comprenant :
    - un corps de soupape (1) avec une chambre de pression (19) remplie par du carburant sous pression,
    - au moins un canal d'injection (11) formé dans le corps de soupape (1) partant de la paroi de la chambre de pression (19) par une ouverture d'entrée (111), ce canal d'injection (11) reliant la chambre de pression (19) à la chambre de combustion du moteur, et
    - une aiguille de soupape (5) qui ferme ou ouvre l'ouverture d'entrée (111) du canal d'injection (11), cette ouverture (111) présentant une section transversale en forme de trou oblong composé par deux demi-cercles et un segment central (c) dont les deux faces sont droites et parallèles,
    caractérisé en ce que
    le canal d'injection (11) forme une ouverture de sortie (211) ronde à son extrémité opposée à l'ouverture d'entrée (111).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le canal d'injection (11) a une paroi droite (311) qui relie l'ouverture d'entrée (111) en forme de trou oblong à l'ouverture de sortie (211) ronde.
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la chambre de pression (19) est formée entre un alésage (3) du corps de soupape (1) et l'aiguille de soupape (5), l'alésage (3) présentant un axe médian (4) orienté approximativement en direction de l'axe longitudinal (17) de l'ouverture d'entrée (111) en forme de trou oblong.
EP02740291A 2001-07-04 2002-04-24 Soupape d'injection de carburant pour moteur a combustion interne Expired - Lifetime EP1407137B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10132449 2001-07-04
DE10132449A DE10132449A1 (de) 2001-07-04 2001-07-04 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/DE2002/001499 WO2003004867A1 (fr) 2001-07-04 2002-04-24 Soupape d'injection de carburant pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1407137A1 EP1407137A1 (fr) 2004-04-14
EP1407137B1 true EP1407137B1 (fr) 2006-05-31

Family

ID=7690604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02740291A Expired - Lifetime EP1407137B1 (fr) 2001-07-04 2002-04-24 Soupape d'injection de carburant pour moteur a combustion interne

Country Status (5)

Country Link
US (1) US6978948B2 (fr)
EP (1) EP1407137B1 (fr)
JP (1) JP4217607B2 (fr)
DE (2) DE10132449A1 (fr)
WO (1) WO2003004867A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10330256A1 (de) * 2003-07-04 2005-01-20 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
FR2876750B1 (fr) * 2004-10-19 2010-09-17 Renault Sas Buse d'injection possedant des trous de conicites differentes et moteur comportant une telle buse
US7572997B2 (en) * 2007-02-28 2009-08-11 Caterpillar Inc. EDM process for manufacturing reverse tapered holes
EP2187043A1 (fr) * 2008-11-14 2010-05-19 Delphi Technologies Holding S.à.r.l. Buse d'injection
DE102010063986B4 (de) * 2010-12-22 2015-08-20 Continental Automotive Gmbh Düsenbaugruppe für ein Einspritzventil und Einspritzventil
CH704964A1 (de) * 2011-05-16 2012-11-30 Liebherr Machines Bulle Sa Düse.
JP6063881B2 (ja) * 2013-03-29 2017-01-18 株式会社デンソー 燃料噴射ノズル
JP6380123B2 (ja) 2015-01-22 2018-08-29 株式会社デンソー 燃料噴射ノズル
US20170211480A1 (en) * 2016-01-21 2017-07-27 Delavan Inc Discrete jet orifices
US10570865B2 (en) * 2016-11-08 2020-02-25 Ford Global Technologies, Llc Fuel injector with variable flow direction
US10612508B2 (en) * 2017-06-28 2020-04-07 Caterpillar Inc. Fuel injector for internal combustion engines
DE112021001389T5 (de) * 2020-03-02 2022-12-15 Cummins Inc. Kraftstoffinjektor mit mehreren reihen von spritzlöchern mit unterschiedlichen querschnittsformen zur durchflussmodulation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6105883A (en) * 1997-10-17 2000-08-22 Toyota Jidosha Kabushiki Kaisha Fuel injector for an internal combustion engine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2557772A1 (de) * 1975-12-20 1977-06-23 Kloeckner Humboldt Deutz Ag Brennstoffeinspritzventil
DE2658783C2 (de) * 1976-12-24 1981-10-15 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Luftverdichtende, direkt einspritzende Brennkraftmaschine
GB8817774D0 (en) * 1988-07-26 1988-09-01 Lucas Ind Plc Fuel injectors for i c engines
JPH09126096A (ja) * 1995-11-06 1997-05-13 Hino Motors Ltd 燃料噴射装置
DE19815918A1 (de) * 1998-04-09 1999-10-21 Man B & W Diesel As Brennstoffeinspritzvorrichtung
US6644565B2 (en) * 1998-10-15 2003-11-11 Robert Bosch Gmbh Fuel injection nozzle for self-igniting internal combustion engines
DE19925380A1 (de) * 1999-06-02 2000-12-07 Volkswagen Ag Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10026324A1 (de) * 2000-05-26 2001-11-29 Bosch Gmbh Robert Brennstoffeinspritzsystem

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6105883A (en) * 1997-10-17 2000-08-22 Toyota Jidosha Kabushiki Kaisha Fuel injector for an internal combustion engine

Also Published As

Publication number Publication date
WO2003004867A1 (fr) 2003-01-16
DE10132449A1 (de) 2003-01-23
US20040011890A1 (en) 2004-01-22
US6978948B2 (en) 2005-12-27
EP1407137A1 (fr) 2004-04-14
JP2004521266A (ja) 2004-07-15
JP4217607B2 (ja) 2009-02-04
DE50207021D1 (de) 2006-07-06

Similar Documents

Publication Publication Date Title
DE69509889T2 (de) Kraftstoffeinspritzventil mit mehrfachen lochscheibenelementen
EP2745003B1 (fr) Soupape pour un fluide en écoulement
DE4039520B4 (de) Kraftstoff-Einspritzventil
EP0656474B1 (fr) Injecteur de carburant pour moteurs à combustion interne
EP1407137B1 (fr) Soupape d'injection de carburant pour moteur a combustion interne
DE19958126B4 (de) Kraftstoffeinspritzdüse
DE102017219932A1 (de) Injektor zur Eindüsung von gasförmigem Kraftstoff
EP0367777B1 (fr) Soupape d'injection
EP0730090A2 (fr) Soupape d'injection de carburant pour moteurs à combustion interne
EP1066465B1 (fr) Soupape d'injection de carburant pour injection sous haute pression
DE4437927C2 (de) Magnetventilgesteuerte Kraftstoffeinspritzvorrichtung mit einer Einspritzdüse zur Kraftstoffeinspritzung in den Brennraum einer Dieselbrennkraftmaschine
EP1518049B1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
WO2000001936A2 (fr) Soupape de pression
DE3810467A1 (de) Kraftstoffeinspritzduese fuer eine luftverdichtende direkteinspritzende brennkraftmaschine
EP0730089A1 (fr) Soupape d'injection de combustible pour moteurs à combustion interne
WO2007104366A2 (fr) Injecteur destiné à des moteurs à combustion interne
EP0698182A1 (fr) Injecteur pour moteurs a combustion interne
EP1601869A1 (fr) Soupape comportant un element ressort, con ue pour un injecteur de carburant
DE10237003A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE3105687A1 (de) "leckoellose kraftstoffeinspritzduese"
EP1644636B2 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
DE102017205665A1 (de) Injektor zum Einbringen eines Fluids mit verbesserter Strahlaufbereitung
DE102004013141A1 (de) Kraftstoffeinspritzventil
DE102016211467A1 (de) Injektor zum Einspritzen einer Flüssigkeit
EP1382840B1 (fr) Soupape d'injection de carburant pour un moteur a combustion interne

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: 20040204

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 TR

17Q First examination report despatched

Effective date: 20040923

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 PRE;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.SCRIBED TIME-LIMIT

Effective date: 20060531

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: 20060531

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: 50207021

Country of ref document: DE

Date of ref document: 20060706

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: 20060531

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: 20070301

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

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

Ref country code: IT

Payment date: 20160422

Year of fee payment: 15

Ref country code: FR

Payment date: 20160422

Year of fee payment: 15

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

Ref country code: DE

Payment date: 20160628

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50207021

Country of ref document: DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20171229

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

Ref country code: DE

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

Effective date: 20171103

Ref country code: FR

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

Effective date: 20170502

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: 20170424