EP1408231A1 - Dispositif d'injection pour l'injection de carburant - Google Patents

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

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Publication number
EP1408231A1
EP1408231A1 EP03103635A EP03103635A EP1408231A1 EP 1408231 A1 EP1408231 A1 EP 1408231A1 EP 03103635 A EP03103635 A EP 03103635A EP 03103635 A EP03103635 A EP 03103635A EP 1408231 A1 EP1408231 A1 EP 1408231A1
Authority
EP
European Patent Office
Prior art keywords
nozzle needle
tip
injection device
needle
spray holes
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
EP03103635A
Other languages
German (de)
English (en)
Other versions
EP1408231B1 (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
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 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

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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, especially in a combustion chamber an internal combustion engine.
  • Injectors for injecting fuel into one Combustion chamber of an internal combustion engine are from the prior art Technology known in different configurations, in particular in connection with accumulator injection systems, such as Common rail systems for the injection of diesel fuel into a combustion chamber of an engine.
  • Such injectors include one guided in a nozzle body Nozzle needle, being at a tip of the nozzle needle Sealed seat between the nozzle needle and the nozzle body realized is.
  • Below the sealing seat in the exit direction there are usually several spray holes, 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 also known here which the space below the sealing seat from which the Spray holes, as small as possible.
  • the injection device according to the invention for injecting Fuel in a combustion chamber is designed such that a tip of a nozzle needle so deep into a micro blind hole is enough that the tip in the longitudinal direction of the nozzle needle too is arranged at the level of the spray holes.
  • the top the nozzle needle is formed at the level of the spray holes, that they deviate from a conical in this area
  • Basic shape is shaped such that a sufficient Clearance between the spray holes and the nozzle needle is.
  • This minimum distance can ensure that the needle is always a sufficient distance from that Has inlet of the spray hole, making it a good one Spray pattern and a good even distribution of the fuel before entering the spray holes. This will make it significant get improved exhaust emissions.
  • this minimum distance between the tip and the Spray holes achieved at the tip of the nozzle needle recesses in the tip at the level of the spray holes are formed.
  • the recesses can be in any be geometric shape.
  • the distance is preferably designed 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 edge point of the spray hole directed inwards to the blind hole in a stroke area of the nozzle needle between 0 and approximately 80 ⁇ m is greater than or equal to 0.200 mm 2 .
  • the tip is formed in the area near the spray hole in such a way that an annular, area-like area with a minimum cross-sectional area of 0.200 mm 2 is present between the tip and the spray hole, both when the nozzle needle is not actuated and with small needle strokes of up to approximately 80 ⁇ m.
  • the ring surface is particularly preferably in one plane, which is perpendicular to the direction of movement of the nozzle needle and through the top edge of the spray hole (s) runs.
  • a particularly good spray pattern is obtained when all Spray holes of the injector in a plane perpendicular are arranged to the direction of movement of the nozzle needle.
  • the tip of the nozzle needle is preferably in the region which is opposite the spray holes, with a Provide recess, which for example as a circumferential groove are formed in the conical tip of the nozzle needle.
  • the cutout can be made, for example, by one, especially step-shaped, paragraph in the top of the Nozzle needle formed in the area opposite the spray holes his.
  • the tip of the nozzle needle is designed such that in the area a second conical one compared to the spray holes Area is formed.
  • the angle is this second conical area to the central axis of the nozzle needle larger as an angle of the tip of the nozzle needle, for example a tight seat of the needle.
  • Such a second conical The area can be particularly simple, for example Grinding the nozzle needle are made. It is still noted that of course also several cone-shaped Areas can successively form the tip of the nozzle needle, where the angle with respect to the central axis of the needle always gets bigger the closer it is to the end of the tip.
  • the present invention is particularly applicable to memory injection systems, such as. Common rail systems used. According to the invention Despite a small blind hole volume, which usually leads to poor exhaust emissions, by the inventive design of the needle tip good uniform distribution of the irradiation quantities and a good one Beam pattern can be obtained, resulting in low HC emissions leads. Thus, an improved mixture formation in the Combustion chamber can be reached, causing a significant reduction the exhaust emissions and also the consumption becomes.
  • FIGS. 1 and 2 first embodiment of the present invention described.
  • the injection device in FIG known manner, a nozzle needle arranged in a nozzle body 1 2.
  • the nozzle needle 2 sits on a sealing seat 4 on Nozzle body 1 and gives the sealing seat, for example by control by means of a piezo actuator, in a known manner Way by moving along the longitudinal axis X-X of the nozzle needle 2 releases or closes this to prevent injection start or end.
  • the nozzle needle 2 essentially has one conical tip 3.
  • the tip 3 through a first conical Area 5, a second conical area 6 and a third conical region 7 is formed. there the conical regions 5, 6, 7 are formed such that they each have a different angle to the longitudinal axis X-X exhibit.
  • the first conical region 5 has the most acute angle with respect to the X-X axis and that at the end the tip 3 has arranged third conical region 7 the obtuse angle with respect to the X-X axis (see Fig 1).
  • Spray holes 8 are formed in a symmetrical manner.
  • the Spray holes 8 are perpendicular to one level the longitudinal axis X-X of the nozzle needle 2.
  • the second is conical Area 6 with the nozzle needle 2 closed and at a smaller needle stroke up to approx. 80 ⁇ m an uppermost edge point 9 and the spray hole 8 opposite. That is more precisely top edge point 9 in a plane E, which is perpendicular to Longitudinal axis X-X of the nozzle needle 2 and the uppermost edge point 9 of the spray hole 8 runs. This results in between top edge point 9 and the tip 3 of the nozzle needle one annular surface A.
  • the annular surface A is shown in detail in the sectional view shown in FIG. 2 along the plane E.
  • the annular surface A has a size of greater than or equal to approximately 0.200 mm 2 .
  • the tip 3 of the nozzle needle is formed in the region opposite the spray hole 8 by an approximately parabolic tapering region 11.
  • This tapering area 11 of the tip 3 is designed such that an area A with a minimum cross section of approximately 0.200 mm 2 results between the uppermost edge point 9 of the spray hole 8 and the tapering area 11.
  • the tapered area can also be produced, for example, by grinding.
  • the second embodiment corresponds to the first Embodiment, so that on the description given there can be referred.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
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 true EP1408231A1 (fr) 2004-04-14
EP1408231B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010032050B4 (de) * 2010-07-23 2017-12-21 Continental Automotive Gmbh Düsenkörper mit Sackloch
GB2552673A (en) * 2016-08-02 2018-02-07 Delphi Int Operations Luxembourg Sarl SCR doser spray atomization

Families Citing this family (9)

* 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
US7360722B2 (en) * 2005-08-25 2008-04-22 Caterpillar Inc. Fuel injector with grooved check member
US7578450B2 (en) * 2005-08-25 2009-08-25 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
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
DE102019210631A1 (de) * 2019-07-18 2021-01-21 Robert Bosch Gmbh Kraftstoffinjektor für Brennkraftmaschinen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5725157A (en) * 1995-09-06 1998-03-10 Buescher, Alfred J. Injector nozzle valve
DE19942370A1 (de) * 1999-09-04 2001-03-22 Bosch Gmbh Robert Einspritzdüse für Brennkraftmaschinen mit einer Ringnut in der Düsennadel
DE10000574A1 (de) * 2000-01-10 2001-07-19 Bosch Gmbh Robert Kraftstoff-Einspritzdüse
DE10031264A1 (de) * 2000-06-27 2002-01-17 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen

Family Cites Families (10)

* 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
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
DE10000501A1 (de) * 2000-01-08 2001-07-19 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
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.
DE10031265A1 (de) * 2000-06-27 2002-01-10 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5725157A (en) * 1995-09-06 1998-03-10 Buescher, Alfred J. Injector nozzle valve
DE19942370A1 (de) * 1999-09-04 2001-03-22 Bosch Gmbh Robert Einspritzdüse für Brennkraftmaschinen mit einer Ringnut in der Düsennadel
DE10000574A1 (de) * 2000-01-10 2001-07-19 Bosch Gmbh Robert Kraftstoff-Einspritzdüse
DE10031264A1 (de) * 2000-06-27 2002-01-17 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010032050B4 (de) * 2010-07-23 2017-12-21 Continental Automotive Gmbh Düsenkörper mit Sackloch
GB2552673A (en) * 2016-08-02 2018-02-07 Delphi Int Operations Luxembourg Sarl SCR doser spray atomization
GB2552673B (en) * 2016-08-02 2020-02-19 Delphi Tech Ip Ltd SCR doser spray atomization

Also Published As

Publication number Publication date
JP2004132376A (ja) 2004-04-30
DE10246693A1 (de) 2004-04-15
DE50305940D1 (de) 2007-01-25
EP1408231B1 (fr) 2006-12-13
US20040112988A1 (en) 2004-06-17
US7017840B2 (en) 2006-03-28

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