EP1523620B1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

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Publication number
EP1523620B1
EP1523620B1 EP03740112A EP03740112A EP1523620B1 EP 1523620 B1 EP1523620 B1 EP 1523620B1 EP 03740112 A EP03740112 A EP 03740112A EP 03740112 A EP03740112 A EP 03740112A EP 1523620 B1 EP1523620 B1 EP 1523620B1
Authority
EP
European Patent Office
Prior art keywords
valve
injection valve
injection
valve according
housing
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
EP03740112A
Other languages
German (de)
English (en)
Other versions
EP1523620A1 (fr
Inventor
Bernhard Gottlieb
Andreas Kappel
Bernhard Fischer
Tim Schwebel
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 EP1523620A1 publication Critical patent/EP1523620A1/fr
Application granted granted Critical
Publication of EP1523620B1 publication Critical patent/EP1523620B1/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
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow

Definitions

  • the invention relates to an injection valve, in particular its injector tip, which projects into the direct injection into a combustion chamber in this.
  • an injection valve in particular its injector tip, which projects into the direct injection into a combustion chamber in this.
  • burn residues deposit on the injector tip.
  • Deposits which are reflected in particular in the vicinity of the fuel discharge gap, influence the geometry of the exiting cone beam, in particular the shape of the cone angle and the strandness of the beam.
  • beam-guided combustion methods are based on the accurate reproducibility of the injection operations in close tolerance ranges throughout the life of the engine, so that the formation of deposits must be avoided.
  • the effect of this design is to prevent the accumulation and settling of combustion residues in the area of the nozzle outlet.
  • a common planar surface is formed on the housing end face of the injection nozzle with the closure body in the closed state of the injection nozzle, so that in particular with a conical surface the combustion chamber facing surface of the injection nozzle and the closure body should remain free of combustion residues.
  • the avoidance of precipitates of combustion residues on the surface of the injector tip can not be optimized with a merely planar surface.
  • the invention has for its object to describe an injection valve at the top of the fluid outlet precipitation of combustion residues are avoided.
  • the invention is based on the finding that in order to avoid lumps of combustion residues in the region of the dividing line between a valve disk and the valve seat of a valve housing, ie in the region of the fluid outlet or the formation of the fluid injection jet, there is a common smooth surface which is free of steps and edges is curved at the same time. Curvature in this case is an outward curvature, which is equivalent to a workpiece radius that is less than infinity.
  • the invention additionally uses the radius of curvature of the surface in the region of the parting line as an optimization parameter.
  • a curved surface which may for example have the shape of a spherical cap
  • the targeted adjustment of the radius of curvature has a lasting effect on the gas flow in the vicinity of the fuel outlet, which in turn has a positive effect on the jet stability with an open injector during the injection cycle.
  • the precipitation tendency of combustion residues is avoided with the injector closed during the combustion and exhaust stroke.
  • a further advantageous embodiment of the invention is that the exiting cone beam, the tangent to the combustion chamber facing surface of the valve body and valve disc in axial section seen perpendicular or nearly vertical, preferably at an angle of about 90 ° ⁇ 20 ° cuts.
  • the figure shows an axial section through the combustion chamber facing the axisymmetric injector tip. It consists of a valve housing 1 with its combustion chamber facing surface 5. Through a space 9 within the injector pressurized fuel is supplied, which is present via an outlet channel 3 in connection to the space 9 at the foremost end of the injector.
  • the valve shown here consists of a valve seat on the valve housing 1 corresponding to the inner surface 7 of the valve housing 1 and the cooperating inner surface 8 of the valve disk 4 and generates a cone beam when opening. This should be as evenly as possible and not by combustion residues, which have attached to the outer surface of the injector, torn.
  • the valve needle 2 is formed or connected at its lower end fixed to the valve plate 4.
  • the valve disk 4 has the combustion chamber facing surface 6 and the space 9 facing inner surface 8.
  • the combustion chamber facing surfaces 5, 6 of valve body 1 and valve plate 4 a common smooth surface without steps and without edges. These considerations are made in each case based on the circumferential parting line 10 between the valve body 1 and the valve disk 4, as at this point combustion residues that could affect the cone beam to be permanently avoided.
  • the surfaces 5, 6 together form a curved surface.
  • a curved surface as shown in the figure, for example a spherical cap, one thus additionally obtains optimization parameters with regard to the jet stability and the avoidance of precipitation of combustion residues at this location.
  • the radius of curvature has a sustained positive influence on the gas flow in the vicinity of the fuel outlet and thus on the jet stability with the injector open during the injection cycle. The same applies to the precipitation tendency of combustion residues with the injector closed during the combustion or exhaust stroke.
  • valve body 1 and valve plate 4 are not limited to spherical caps, but there are all easy to manufacture surface shapes in question, such as. Paraboloids, ellipsoids, hyperboloids, if they can favorably influence the jet stability and coking tendency.
  • a frustoconical design can be provided as an end termination on the valve tip.
  • the inner surface 7 of the valve body 1 forms, together with the inner surface 8 of the valve disk 4, the outlet channel 3 for the fuel.
  • the outlet channel 3 of the fuel must be designed so that the flow-through cross section in the flow direction, ie from the inside to the outside, is constant or decreasing. Thus cavitation in the fuel is safely avoided and the sealing surface or sealing line, which is located at the outer edge of the outlet channel 3, is not damaged.
  • the inner surfaces 7, 8 of valve body 1 and valve disk 4 meet in the flow direction at a shallow angle, ie either almost parallel or in tangential form with the injector closed.
  • the tangent direction in the figure the course of the surface 8, determines the cone beam angle ⁇ .

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. Soupape d'injection, qui injecte directement dans un espace de combustion, comprenant :
    - un carter de soupape (1) conçu en forme de cylindre creux avec un siège de soupape côté extrémité,
    - une aiguille de soupape (2) coaxiale intérieure avec une tête de soupape (4) coopérant avec le siège de soupape,
    - un espace (9) représenté entre le carter de soupape (1) et l'aiguille de soupape (2) pour l'arrivée de carburant,
    caractérisée en ce que
    les surfaces (5, 6) du carter de soupape (1) et de la tête de soupape (4) présentent une surface commune lisse, sans marches et sans arêtes et en même temps incurvée, dans l'état fermé dans la zone de la ligne de séparation (10).
  2. Soupape d'injection selon la revendication 1, dans laquelle la surface incurvée de la soupape d'injection est représentée par un paraboloïde, un hyperboloïde ou un ellipsoïde, en particulier une calotte sphérique.
  3. Soupape d'injection selon la revendication 2, dans laquelle l'extrémité avant de la soupape d'injection est conçue en forme de cône tronqué, tel qu'un cône tronqué parabolique, un cône tronqué hyperbolique, un cône tronqué ellipsoïdal ou un cône tronqué en forme de calotte sphérique.
  4. Soupape d'injection selon l'une quelconque des revendications précédentes, dans laquelle un ou plusieurs rayons de courbure de la structure de surface de la pointe de la soupape d'injection sont inférieurs au rayon du carter de soupape (1).
  5. Soupape d'injection selon l'une quelconque des revendications précédentes, dans laquelle l'espace (9) pour l'arrivée de carburant fait place à un canal de sortie (3), qui est délimité par la surface (7) intérieure du corps de soupape (1) et la surface intérieure (8) de la tête de soupape (4).
  6. Soupape d'injection selon la revendication 5, dans laquelle le canal de sortie (3) est conçu de telle sorte que la section parcourue par le carburant est constante ou diminue dans le sens d'écoulement.
  7. Soupape d'injection selon l'une quelconque des revendications précédentes, dans laquelle un faisceau conique sortant sur la ligne de séparation (10) lorsque la vanne est ouverte coupe la tangente aux surfaces (5, 6), tournées vers l'espace de combustion, du corps de soupape (1) et de la tête de soupape (4) perpendiculairement ou à peu près perpendiculairement dans un angle d'environ 90° ± 20°.
EP03740112A 2002-07-18 2003-07-01 Soupape d'injection Expired - Lifetime EP1523620B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10232693A DE10232693A1 (de) 2002-07-18 2002-07-18 Einspritzventil
DE10232693 2002-07-18
PCT/DE2003/002185 WO2004016940A1 (fr) 2002-07-18 2003-07-01 Soupape d'injection

Publications (2)

Publication Number Publication Date
EP1523620A1 EP1523620A1 (fr) 2005-04-20
EP1523620B1 true EP1523620B1 (fr) 2008-01-09

Family

ID=30010178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03740112A Expired - Lifetime EP1523620B1 (fr) 2002-07-18 2003-07-01 Soupape d'injection

Country Status (8)

Country Link
US (1) US7108201B2 (fr)
EP (1) EP1523620B1 (fr)
JP (1) JP4465272B2 (fr)
CN (1) CN1668841A (fr)
AU (1) AU2003285291A1 (fr)
DE (2) DE10232693A1 (fr)
ES (1) ES2295603T3 (fr)
WO (1) WO2004016940A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10331266A1 (de) * 2003-07-10 2005-03-24 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006003668A1 (de) * 2006-01-26 2007-08-02 Bayerische Motoren Werke Ag Brennstoffeinspritzventil mit nach aussen öffnender Düsennadel
KR20120061640A (ko) * 2010-12-03 2012-06-13 현대자동차주식회사 노킹 방지 장치 및 이를 제어하는 방법
US9416709B2 (en) * 2012-06-15 2016-08-16 Continental Automotive Systems, Inc. Coking resistant after-treatment dosing value
DE102019111122A1 (de) * 2019-04-30 2020-11-05 Voith Patent Gmbh Injektordüse

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE475116C (de) * 1925-01-21 1929-04-19 Deckel Friedrich Verfahren und Vorrichtung zum Einspritzen von Brennstoff in Verbrennungskraftmaschinen
US4350301A (en) * 1980-06-25 1982-09-21 The Bendix Corporation Flow controlled pressure regulating device
GB2138884B (en) * 1983-04-26 1987-02-18 Maschf Augsburg Nuernberg Ag I c engine fuel injection nozzle
GB2219627B (en) * 1988-06-10 1992-10-28 Orbital Eng Pty Improvements relating to nozzles for in-cylinder fuel injection systems
US5685492A (en) * 1990-01-26 1997-11-11 Orbital Engine Company (Australia) Pty. Limited Fuel injector nozzles
DE19623713B4 (de) * 1996-06-14 2008-06-19 Robert Bosch Gmbh Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors
DE19739905A1 (de) * 1997-09-11 1999-03-18 Bosch Gmbh Robert Kraftstoffeinspritzventil
DE10012969B4 (de) * 2000-03-16 2008-06-19 Daimler Ag Einspritzdüse und ein Verfahren zur Bildung eines Kraftstoff-Luftgemischs

Also Published As

Publication number Publication date
ES2295603T3 (es) 2008-04-16
JP4465272B2 (ja) 2010-05-19
EP1523620A1 (fr) 2005-04-20
US20050092854A1 (en) 2005-05-05
DE50308979D1 (de) 2008-02-21
JP2005533224A (ja) 2005-11-04
US7108201B2 (en) 2006-09-19
DE10232693A1 (de) 2004-02-05
WO2004016940A1 (fr) 2004-02-26
AU2003285291A1 (en) 2004-03-03
CN1668841A (zh) 2005-09-14

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