EP1117928B1 - Buse d'injection de carburant - Google Patents

Buse d'injection de carburant Download PDF

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Publication number
EP1117928B1
EP1117928B1 EP99969475A EP99969475A EP1117928B1 EP 1117928 B1 EP1117928 B1 EP 1117928B1 EP 99969475 A EP99969475 A EP 99969475A EP 99969475 A EP99969475 A EP 99969475A EP 1117928 B1 EP1117928 B1 EP 1117928B1
Authority
EP
European Patent Office
Prior art keywords
injection
injection holes
fuel
nozzle
recess
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
EP99969475A
Other languages
German (de)
English (en)
Other versions
EP1117928A1 (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

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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
    • 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 injector for Internal combustion engines in the preamble of claim 1 mentioned type.
  • Such injectors are in particular at direct injection internal combustion engines in general Use.
  • the injection nozzle In the injection system of an internal combustion engine with fuel injection, especially with direct fuel injection, the injection nozzle has the task of the combustion chamber to supply the engine with fuel in a targeted and metered manner.
  • the type of fuel processing by the injector and the course of the injection process affect the Burning in the combustion chamber considerably.
  • a fuel injector essentially consists of two Parts, the nozzle body and the nozzle needle.
  • the nozzle needle is axially movable in the nozzle body.
  • a free space is provided between the front part of the nozzle needle and the inner wall of the nozzle body.
  • Common rail injection are systems where the fuel from a high pressure pump in a common to all cylinders of the engine Pressure accumulator is conveyed from which the injectors be supplied to the individual cylinders.
  • 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 especially with regard to noise and exhaust gas behavior. Due to the small amount of fuel, the Pre-inject the nozzle needle very little from its seat in the nozzle body, the conical sealing surface. Centering therefore have a particularly strong impact.
  • Document DE 197 26 099 A1 describes a fuel injection nozzle known in the area of the injection holes a circular recess portion is provided which serves to round the injection holes in the upper area different from rounding the injection holes in the lower one Shaping area and thereby the fuel injection vary according to a change in fuel pressure.
  • a fuel injection valve known with a nozzle tip in the above Injection holes a cylindrical step is introduced. The The step serves to end the seat of the nozzle needle to specify exactly.
  • an injection valve with a cylindrical recess known in a nozzle tip is an injection valve with a cylindrical recess known in a nozzle tip.
  • the tip of this injector has the shape of a cylindrical valve section on that the cylindrical recess in the nozzle tip seals.
  • the injection holes will be here via channels arranged in the tip of the nozzle needle are supplied with fuel.
  • the invention has for its object the aforementioned Design the injector so that the fuel always with the intended even distribution in the Combustion chamber of the internal combustion engine is injected.
  • the invention is accordingly a cylindrical recess in the interior of the nozzle body in the area of the injection holes characterized.
  • the recess is, on the one hand, that the transition from the interior of the No longer the nozzle body to the respective injection hole is sharp-edged and therefore the fuel with less turbulence is injected into the injection holes.
  • It also has special shape the advantage that around the cone at the top the nozzle needle creates an annular channel that when lifting the Nozzle needle to supply the injection holes evenly with fuel, even if the nozzle needle is not precise is centered. This advantage is particularly important when injecting of small amounts of fuel such as the pre-injection is important.
  • the drawing shows the tip of a fuel injector on average.
  • Injection holes 14 formed in the tip 10 are radially circumferential at a certain angle (to the axis of the nozzle body 12 Injection holes 14 formed.
  • Through the series of injection holes 14 becomes the fuel with the injector open in the well known manner under pressure in the Combustion chamber of the internal combustion engine injected, the arrangement of the injection holes 14 the atomization pattern of the Determined fuel.
  • the nozzle needle 20 has on it Tip a cone 22 with which when the injector is closed, in the area of the injection holes 14 and especially in the flow direction of the fuel above thereof on a conical sealing surface 16 in the tip 10 of the Nozzle body 12 abuts.
  • the conical sealing surface 16 forms a seat for the cone 22 so that when the injector is closed no fuel from the interior 18 between the Nozzle needle 20 and the nozzle body 12 to the injection holes 14 arrives.
  • the inside of the tip 10 of the nozzle body 12 is worked out in a cylindrical manner such 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 the extent that the seal is secured when the injection nozzle is closed ,
  • 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 annular circumferential, cylindrical recess 30 the inside of the tip 10 can be made by any suitable method be formed, for example by drilling, Grinding, milling, an erosion process such as die sinking EDM, Laser cutting and the like.
  • the interior of the nozzle body 12 in the otherwise essentially conical tip 10 in the surroundings of the injection holes 14 are cylindrical.
  • the injection holes 14 can be in the area of the corner between the cylinder jacket 32 and the top surface 34 of the Recess 30 forming circular cylinder can be arranged as it is shown in the drawing, or they can be 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 of the inside of the nozzle body 12 go out.
  • the recess 30 reduces the angle in any case the individual injection holes 14 with the inner wall of the tip 10 of the nozzle body 12 form. 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 pointed, i.e. is less than 90 °, is the angle between the individual injection holes 14 and the inner wall the recess 30 considerably larger than 90 ° and thus pretty dull. The transition between the interior of the nozzle body 12 to the individual injection holes 14 is thereby less sharp-edged and there is less turbulence when the fuel is introduced into the injection holes.
  • cylindrical recess 30 um the cone 22 of the nozzle needle 20 from an annular channel which at Lift off the nozzle needle 20 at the beginning of the injection and during the injection also with respect to centering errors the nozzle needle 20 a uniform supply of the injection holes 14 with fuel and thus a uniform atomization pattern of fuel guaranteed.

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 (1)

  1. Buse d'injection pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne, comportant un corps de buse (12) muni d'une pointe (10), un évidement cylindrique (30) étant ménagé dans un espace intérieur de la pointe (10), cette buse comportant également des trous d'injection (14), reliés à l'évidement (30) et une aiguille de buse (20), un cône (22) étant réalisé à la pointe de l'aiguille de buse (20), la pointe (10) présentant, dans l'espace intérieur, une surface d'étanchéité (16), qui forme un siège pour le cône (22), l'aiguille de buse (20) ouvrant ou coupant de façon sélective le chemin du carburant vers les trous d'injection (14), l'évidement (30) étant disposé en dessous de la pointe et formant, autour du cône (22), un canal annulaire auquel sont raccordés les trous d'injection (14), et l'évidement (30) étant réalisé en formant une surface latérale de cylindre (32) et une surface de recouvrement (34),
       caractérisée en ce que
       la surface de recouvrement (34) de l'évidement (30) de forme cylindrique a essentiellement une forme circulaire plane, et la zone de transition allant de la surface latérale de cylindre (32) à la surface de recouvrement (34) est comprise dans un angle essentiellement de 90°,
       et en ce que les trous d'injection (14) sont disposés dans la zone de la surface latérale de cylindre (32) de l'évidement (30) de forme cylindrique, et présentent un écart axial avec la zone de transition allant de la surface latérale de cylindre (32) vers la surface de recouvrement (34) de l'évidement (30) de forme cylindrique.
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 EP1117928A1 (fr) 2001-07-25
EP1117928B1 true 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)

Families Citing this family (11)

* 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.
DE102016215637A1 (de) * 2016-08-19 2018-02-22 Robert Bosch Gmbh Kraftstoffeinspritzdüse
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

Also Published As

Publication number Publication date
WO2000017514A1 (fr) 2000-03-30
EP1117928A1 (fr) 2001-07-25
DE19843616A1 (de) 2000-03-30
DE19843616B4 (de) 2006-07-06
DE59903588D1 (de) 2003-01-09

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