EP1799997B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1799997B1
EP1799997B1 EP05804894A EP05804894A EP1799997B1 EP 1799997 B1 EP1799997 B1 EP 1799997B1 EP 05804894 A EP05804894 A EP 05804894A EP 05804894 A EP05804894 A EP 05804894A EP 1799997 B1 EP1799997 B1 EP 1799997B1
Authority
EP
European Patent Office
Prior art keywords
outlet opening
opening
fuel injection
valve seat
injection valve
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.)
Not-in-force
Application number
EP05804894A
Other languages
German (de)
English (en)
Other versions
EP1799997A1 (fr
Inventor
Markus Gesk
Guenter Dantes
Joerg Heyse
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 EP1799997A1 publication Critical patent/EP1799997A1/fr
Application granted granted Critical
Publication of EP1799997B1 publication Critical patent/EP1799997B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M61/1853—Orifice plates

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a fuel injector is already known in which a perforated disc is provided with a plurality of outlet openings downstream of the valve seat.
  • an inlet opening with a larger diameter is formed between an outlet opening in the valve seat body and the perforated disk, which forms an annular inflow cavity for the outlet openings.
  • the outlet openings of the perforated disc are in direct contact with the inflow opening and the annular inflow cavity Flow connection and are covered by the upper boundary of the inflow opening. In other words, there is a complete offset from the outlet opening and the outlet openings defining the inlet of the inflow opening.
  • the inflow opening defining the S-shaped course of the flow has a continuously constant height.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that in a simple manner uniform atomization of the fuel is achieved, with a particularly high quality of preparation and Zerstäubungsgüte is achieved with very small fuel droplets.
  • This is achieved in an advantageous manner by providing in the valve seat body upstream of the outlet openings an inflow opening with an annular inflow cavity which is larger than an outlet opening downstream of the valve seat. In this way, the valve seat body already assumes the function of influencing the flow in the perforated disc.
  • an S-impact in the flow for atomization improvement of the fuel is achieved by the formation of the inflow opening, since the valve seat body covers the outlet openings of the perforated disk with the upper boundary of the inflow opening To the outlet openings in the perforated disk, the flow in the inflow opening is advantageously accelerated to promote atomization.
  • an inflatable passage area above the at least one outlet opening in the upstream of the perforated disk Anströmlohlraum is smaller than the surface of the inlet plane of the outlet, wherein the passage area calculated as the product of the circumference of the outlet opening in the area its inlet level and the free height in the inflow cavity of the inflow opening.
  • the horizontal velocity components of the flow entering the entry plane are not obstructed by the wall of the respective outlet opening at the entry plane, so that the fuel jet has the full intensity of the horizontal components generated in the onflow cavity when exiting the exit opening and therefore fanning with maximum atomization.
  • perforated disks By means of electrodeposition, perforated disks can be produced in a reproducible manner in an extremely precise and cost-effective manner in very large numbers simultaneously. In addition, this production allows an extremely large design freedom, since the contours of the openings in the perforated disc can be selected freely.
  • FIG. 1 a partially illustrated injection valve
  • FIG. 2 the section II in FIG. 1 with the inventively designed Anströmhohlraum in an enlarged view
  • FIG. 3 the same section II with a second embodiment.
  • FIG. 1 For example, as an embodiment, a valve in the form of an injector for fuel injection systems of mixture-compression spark-ignition internal combustion engines is partially shown.
  • the injection valve has a tubular valve seat carrier 1, which only schematically indicates a part of a valve housing and in which a longitudinal opening 3 is formed concentrically to a valve longitudinal axis 2.
  • a longitudinal opening 3 In the longitudinal opening 3 is a z.
  • tubular valve needle 5 which at its downstream end 6 with a z.
  • the actuation of the injection valve takes place in a known manner, for example electromagnetically.
  • a schematically indicated electromagnetic circuit with a solenoid 10, an armature 11 and a core 12.
  • the armature 11 is connected to the valve closing body. 7 opposite end of the valve needle 5 by eg a trained by a laser weld and aligned with the core 12.
  • valve seat body 16 In the downstream end of the valve seat carrier 1 is a valve seat body 16, e.g. tightly assembled by welding. At its lower end face 17 facing away from the valve closing body 7, the valve seat body 16 is stepped, with a recess 20 being provided in a central area around the valve longitudinal axis 2, in which a flat, e.g. single-layer perforated disc 23 is introduced.
  • the perforated disc 23 has at least one, but ideally two to forty outlet openings 24.
  • an inflow opening 19 Upstream of the recess 20 and thus of the outlet openings 24 of the perforated disc 23, an inflow opening 19 is provided in the valve seat body 16, via which the individual outlet openings 24 are flowed.
  • the inflow opening 19 has a diameter which is greater than the opening width of an outlet opening 27 in the valve seat body 16, from which the fuel flows into the inflow opening 19 and ultimately into the outlet openings 24.
  • the inflow opening 19 is designed in particular in the direct inflow region of the outlet openings 24 with a special geometry.
  • the opposite of the outlet opening 27 larger diameter annular region of the inflow opening 19 is in the FIGS. 2 and 3 shown enlarged, explained in more detail with reference to these figures and is hereinafter referred to as Anströmhohlraum 26.
  • valve seat body 16 and perforated disc 23 are effected for example by a circumferential and dense, formed by a laser weld 25, which is placed outside of the inflow opening 19. After attachment of the perforated disc 23, this is sunk in the recess 20 opposite the end face 17th
  • the insertion depth of the valve seat body 16 with the perforated disc 23 in the longitudinal opening 3 determines the size of the stroke of the valve needle 5, since the one end position of the valve needle 5 at non-energized solenoid 10 by the system of the valve closing body 7 at a downstream conically tapered valve seat surface 29 of the valve seat body 16 is set.
  • the other end position of the valve needle 5 is fixed in the excited magnet coil 10, for example, by the system of the armature 11 to the core 12. The path between these two end positions of the valve needle 5 thus represents the hub.
  • the perforated disc 23 may be constructed, for example, two layers with two levels of function one above the other.
  • the outlet openings 24 of the perforated disc 23 are in direct flow communication with the inflow opening 19 and the annular inflow cavity 26 and are thereby covered by the upper boundary of the inflow opening 19. In other words, there is a complete offset of the outlet opening 27 and the outlet openings 24 defining the inlet of the inflow opening 19. Due to the radial offset of the outlet openings 24 with respect to the outlet opening 27 results in an S-shaped flow pattern of the medium, here the fuel.
  • the perforated disk 23 is produced, for example, by means of galvanic metal deposition, wherein the production of a single-layer perforated disk 23 is advantageous, in particular with the technique of lateral overgrowth.
  • a punching technical production of the perforated disc 23 is just as conceivable.
  • the outlet openings 24 ideally have a trumpet-shaped or lavallous-like contour. From the cross-section, the outlet openings 24 may have, for example, a circular, oval or also polygonal shape.
  • FIG. 2 shows an enlarged section II in FIG. 1 to clarify the geometry of the inflow opening 19 and the Anströmhohlraums 26 between the boundary surface 30 of the valve seat body 16 and the perforated disc 23.
  • the valve seat body 16 is configured such that the boundary surface 30 of the outlet opening 27 (diameter D1) starting in the direction of the perforated disc 23 in a first portion 30a radially outwardly sloping continuously inclined to a diameter D2.
  • a step or a bend is provided in the boundary surface 30, from which a second section 30b of the inflow opening 19 follows radially outwards, which is bounded largely perpendicular to the valve longitudinal axis 2 by the boundary surface 30.
  • the second section 30b thus has a substantially constant height.
  • the transition from the first to the second section of the boundary surface 30 lies directly in front of the outlet openings 24, directly at the boundary edges of the outlet openings 24 or above the outlet openings 24. This leads to the fact that above a perpendicular to the valve longitudinal axis 2 extending entrance plane 31 of At least one outlet opening 24 is present only a small amount of Anströmhohlraums 26 and the flow on the way from the outlet opening 27, starting to the outlet openings 24 is accelerated steadily Zerstäubungsfördemd.
  • the diameter of the entire inflow opening 19 including a relative to the outlet openings 24 radially outward back space R is denoted by D3.
  • An imaginary flowable vertical passage area above the outlet opening 24 in the onflow cavity 26 calculated as the product of the circumference of the outlet opening 24 in the region of its inlet plane 31 and the free height in the onflow cavity 26 is smaller than the area of the inlet plane 31 of the outlet opening 24. The highest atomization quality is achieved if this ratio is maintained at all outlet openings 24 of the perforated disc 23
  • the imaginary passage area is the smallest, volume-measuring cross-section in the flow path.
  • the entry level 31 of the outlet opening 24, the flow entering it provides more cross-sectional area than is needed for the flow rate predated by the passage area 32.
  • the flow is thus completely detached from the wall of the outlet opening 24 in the entry plane 31.
  • the horizontal velocity components of the flow entering the inlet plane 31 are thus not hindered by the wall of the outlet opening 24 at the entry plane 31, so that the fuel jet when leaving the outlet opening 24 has the full intensity of the horizontal components generated in the onflow cavity 26 and therefore with maximum atomization fan out.
  • FIG. 3 is a further invention inventively designed Anströmhohlraum 26 as an annular region of the inflow opening 19 in an enlarged view in one with FIG. 2 shown comparable section.
  • the boundary surface 30 of the valve seat body 16 extends from the outlet opening 27 parabolic, convex, said first portion 30a of the boundary surface 30 above the at least one outlet opening 24 flowing in the second substantially perpendicular to the valve longitudinal axis 2 extending, a constant height portion 30b passes

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  • 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 de carburant pour installations d'injection de carburant de moteurs à combustion interne, comprenant un axe longitudinal de soupape (2), un corps de siège de soupape (16) présentant un siège de soupape fixe (29), un corps de fermeture de soupape (7) coopérant avec le siège de soupape (29), qui est déplaçable axialement le long de l'axe longitudinal de soupape (2), et un disque perforé (23) disposé en aval du siège de soupape (29), qui possède au moins une ouverture d'écoulement (24), et une ouverture d'afflux (19) entre une ouverture de sortie (27) de plus petit diamètre du corps de siège de soupape (16) et l'au moins une ouverture d'écoulement (24), une surface de limitation (30) du corps de siège de soupape (16) opposée au disque perforé (23) étant réalisée de telle sorte que la hauteur de l'ouverture d'afflux (19), partant de l'ouverture de sortie (27), diminue constamment dans une première portion (30a) jusqu'à l'au moins un ouverture d'écoulement (24), tandis que la hauteur de l'ouverture d'afflux (19) est essentiellement constante dans une deuxième portion radialement extérieure (30b),
    caractérisée en ce
    qu'une surface de passage imaginaire pouvant être parcourue par l'écoulement sur l'au moins une ouverture d'écoulement (24) dans l'ouverture d'afflux (19) prévue en amont du disque perforé (23), qui se calcule comme le produit de la périphérie de l'ouverture d'écoulement (24) dans la région dé son plan d'entrée (31) et de la hauteur libre dans l'ouverture d'afflux (19), est plus petite que la surface du plan d'entrée (31) de l'ouverture d'écoulement (24).
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que la première portion (30a) est limitée par une surface de limitation (30) plane et inclinée obliquement.
  3. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que la première portion (30a) est limitée par une surface de limitation (30) de courbure parabolique.
  4. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que la transition de la première (30a) à la deuxième (30b) portion se situe immédiatement avant l'au moins une ouverture d'écoulement (24), directement sur l'arête de limitation de l'au moins une ouverture d'écoulement (24) ou au-dessus de l'au moins une ouverture d'écoulement (24).
  5. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que l'au moins une ouverture d'écoulement (24) présente un contour en forme de trompette ou de buse de Laval.
  6. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que le disque perforé (23) peut être fabriqué par dépôt de métal galvanique ou par une technique d'estampage.
  7. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que l'on prévoit dans le disque perforé (23) entre deux et quarante ouvertures d'écoulement (24), et la surface de passage pouvant être parcourue par l'écoulement sur chaque ouverture d'écoulement (24) dans l'ouverture d'afflux (19) est plus petite que la surface du plan d'entrée (31) de l'ouverture d'écoulement respective (24).
EP05804894A 2004-10-09 2005-09-20 Soupape d'injection de carburant Not-in-force EP1799997B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004049281A DE102004049281A1 (de) 2004-10-09 2004-10-09 Brennstoffeinspritzventil
PCT/EP2005/054695 WO2006040244A1 (fr) 2004-10-09 2005-09-20 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1799997A1 EP1799997A1 (fr) 2007-06-27
EP1799997B1 true EP1799997B1 (fr) 2009-11-18

Family

ID=35355040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05804894A Not-in-force EP1799997B1 (fr) 2004-10-09 2005-09-20 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US20090032623A1 (fr)
EP (1) EP1799997B1 (fr)
JP (1) JP2008516135A (fr)
CN (1) CN100572794C (fr)
DE (2) DE102004049281A1 (fr)
WO (1) WO2006040244A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2189224A1 (fr) * 2008-11-22 2010-05-26 Grundfos Management A/S Buse
CN103223390A (zh) * 2013-04-02 2013-07-31 张建辉 一种压电陶瓷超声雾化器
CN106000677B (zh) * 2016-07-15 2022-05-24 陕西华远动力科技有限公司 燃油预雾化器、燃油雾化接头及其燃油预雾化器制造方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19724075A1 (de) * 1997-06-07 1998-12-10 Bosch Gmbh Robert Verfahren zur Herstellung einer Lochscheibe für ein Einspritzventil und Lochscheibe für ein Einspritzventil und Einspritzventil
US6644565B2 (en) * 1998-10-15 2003-11-11 Robert Bosch Gmbh Fuel injection nozzle for self-igniting internal combustion engines
JP2000199468A (ja) * 1998-12-28 2000-07-18 Moritex Corp 内燃機関の燃料噴射装置および燃料噴射方法
JP2001027169A (ja) * 1999-07-15 2001-01-30 Unisia Jecs Corp 燃料噴射弁
DE19937961A1 (de) * 1999-08-11 2001-02-15 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung von Austrittsöffnungen an Ventilen
JP4097056B2 (ja) * 2000-03-17 2008-06-04 株式会社デンソー 燃料噴射弁
US6742727B1 (en) * 2000-05-10 2004-06-01 Siemens Automotive Corporation Injection valve with single disc turbulence generation
JP2002054533A (ja) * 2000-08-16 2002-02-20 Unisia Jecs Corp 燃料噴射弁及び該燃料噴射弁に用いるノズルプレートの製造方法
JP2002115628A (ja) * 2000-10-10 2002-04-19 Nippon Soken Inc 燃料噴射弁および内燃機関
JP3837283B2 (ja) * 2000-10-24 2006-10-25 株式会社ケーヒン 燃料噴射弁
DE10118273A1 (de) * 2001-04-12 2002-10-17 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10124748A1 (de) * 2001-05-21 2003-02-27 Bosch Gmbh Robert Brennstoffeinspritzventil
US6817545B2 (en) * 2002-01-09 2004-11-16 Visteon Global Technologies, Inc. Fuel injector nozzle assembly
US6789754B2 (en) * 2002-09-25 2004-09-14 Siemens Vdo Automotive Corporation Spray pattern control with angular orientation in fuel injector and method
US6921021B2 (en) * 2003-01-09 2005-07-26 Siemens Vdo Automotive Corporation Spray pattern control with non-angled orifices formed on a dimpled fuel injection metering disc having a sac volume reducer
US7258284B2 (en) * 2003-12-19 2007-08-21 Siemens Vdo Automotive Corporation Fuel injector with a metering assembly having a seat molded to a polymeric support member
US7048202B2 (en) * 2004-03-04 2006-05-23 Siemens Vdo Automotive Corporation Compound-angled orifices in fuel injection metering disc

Also Published As

Publication number Publication date
CN100572794C (zh) 2009-12-23
US20090032623A1 (en) 2009-02-05
DE502005008556D1 (de) 2009-12-31
DE102004049281A1 (de) 2006-04-20
EP1799997A1 (fr) 2007-06-27
WO2006040244A1 (fr) 2006-04-20
CN101040116A (zh) 2007-09-19
JP2008516135A (ja) 2008-05-15

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