EP1799998A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1799998A1
EP1799998A1 EP05804895A EP05804895A EP1799998A1 EP 1799998 A1 EP1799998 A1 EP 1799998A1 EP 05804895 A EP05804895 A EP 05804895A EP 05804895 A EP05804895 A EP 05804895A EP 1799998 A1 EP1799998 A1 EP 1799998A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
outlet opening
injection valve
valve seat
valve according
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
EP05804895A
Other languages
German (de)
English (en)
Other versions
EP1799998B1 (fr
Inventor
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 EP1799998A1 publication Critical patent/EP1799998A1/fr
Application granted granted Critical
Publication of EP1799998B1 publication Critical patent/EP1799998B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 injection valve is already known in which a perforated disc with a plurality of outlet openings is provided 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 disc, which forms an annular inflow cavity for the outlet openings.
  • the outlet openings of the perforated disc are in direct flow communication with the inflow opening and the annular inflow cavity and are thereby covered by the upper boundary of the inflow opening. In other words, a complete offset is from the outlet opening defining the inlet of the inflow opening and the Outlet openings.
  • 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 in that, downstream of a valve seat, an inflowable passage area above at least one outlet opening in an inflow cavity provided upstream of the perforated disk is smaller than the area of the inlet plane of the outlet opening, the passage area being calculated as the product from the circumference of the outlet opening in FIG Range of their entry level and the free height in the Anströmhohlraum.
  • 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.
  • an inflow opening is provided with the annular Anströmhohlraum, which is greater than an outlet opening downstream of the valve seat.
  • the valve seat body already assumes the function of influencing the flow in the perforated disc.
  • the formation of the inflow opening achieves an S-blow in the flow for atomization improvement of the fuel, since the valve-seat body with the upper boundary of the inflow opening covers the outlet openings of the perforated disk.
  • FIG. 2 shows the detail II in Figure 1 with the invention designed according to the ring area in an enlarged view
  • Figure 3 shows the same section II with a second embodiment
  • Figure 4 the same section II with a third embodiment
  • Figure 5 the same section II with a fourth embodiment.
  • a valve in the form of an injection valve for fuel injection systems of mixture-compression spark-ignition internal combustion engines partially.
  • 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 is 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 is connected by, for example, 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 flown.
  • 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 annular region of the inflow opening 19 which is larger in diameter relative to the outlet opening 27 is shown enlarged in FIGS. 2 to 5, explained in more detail with reference to these figures and is referred to below as the inflow cavity 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 disk 23 can also be constructed, for example, in two layers with two functional levels 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.
  • the perforated disc 23 is produced for example by means of electrodeposition, wherein the production of a single-layer perforated disc 23, in particular with the technique of the lateral
  • the outlet openings 24 ideally have a trumpet-shaped or lavallous-like contour. From the cross-section, the outlet openings 24 may be e.g. have a circular, oval or polygonal shape.
  • FIG. 2 shows an enlarged section II in FIG. 1 for clarifying the geometry of the onflow cavity 26 between the boundary surface 30 of the valve seat body 16 and the perforated disk 23.
  • the valve seat body 16 is designed such that the boundary surface 30 projects radially from the outlet opening 27 to the perforated disk 23 on the outside steadily inclined inclined sloping.
  • an inlet plane 31 of the at least one outlet opening 24, which is perpendicular to the valve longitudinal axis 2 has only a small height of the onflow cavity 26 and the flow is steadily accelerated on the way to the outlet openings 24.
  • a flowable vertical passage area 32 above the outlet opening 24 in the onflow cavity 26, which is calculated as the product of the circumference of the Auslassöffiiung 24 in the region of its inlet level 31 and the free height in the Anströmhohlraum 26, smaller than the area of the entrance plane 31 of the Auslassöfmung 24 (area 32 ⁇ area 31).
  • This ratio applies to at least one outlet opening 24; However, the highest atomization quality is achieved if this ratio is maintained at all outlet openings 24 of the perforated disc 23.
  • the passage area 32 is the smallest, volume-measuring cross-section in the flow path.
  • the inlet plane 31 of the outlet opening 24 offers the flow entering it more cross-sectional area than is required for the pre-metered through the passage surface 32 flow rate. The flow is thus completely detached from the wall of the outlet opening 24 in the entry plane 31.
  • Velocity components of the flow entering into the entry 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 fan out with maximum atomization.
  • FIG. 3 shows an exemplary embodiment in which the boundary surface 30 of the valve seat body 16 is curved downwards directly above the outlet opening 24 in order to reduce the passage area 32 to be smaller than the area of the entry level 31 of the outlet opening 24.
  • FIGS. 4 and 5 show two exemplary embodiments in which the boundary surface 30 of the valve seat body 16 runs flat and perpendicular to the valve longitudinal axis 2, but the outlet openings 24 are raised in the onflow cavity 26.
  • the area of the perforated disc 23 which is raised in each case around the outlet openings 24 can in this case be e.g. convex ( Figure 4) or concave ( Figure 5) be bulged out.
  • Such contours can be produced, for example, by means of ECM processes (Electro Chemical Machining).
  • ECM processes Electro Chemical Machining
  • each outlet opening 24 is also fed on the backspace side with a significant flow rate component.
  • the back space R is understood to be the region of the onflow cavity 26 lying radially outward of the respective outlet opening 24. Consequently, the lateral velocity vectors are divergent at the exit of the outlet ports 24 and provide good atomization of the fuel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Soupape d'injection de carburant caractérisée en ce qu'elle possède, en aval d'un corps (16) pourvu d'un siège (29) de soupape fixe, un disque (23) à trous pourvu d'au moins un trou de sortie (24). Une ouverture d'amenée (19) pourvue d'une cavité d'afflux (26) annulaire est située immédiatement en amont des trous de sortie<sup/
EP05804895A 2004-10-09 2005-09-20 Soupape d'injection de carburant Expired - Fee Related EP1799998B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004049278A DE102004049278A1 (de) 2004-10-09 2004-10-09 Brennstoffeinspritzventil
PCT/EP2005/054699 WO2006040247A1 (fr) 2004-10-09 2005-09-20 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1799998A1 true EP1799998A1 (fr) 2007-06-27
EP1799998B1 EP1799998B1 (fr) 2009-11-25

Family

ID=35260869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05804895A Expired - Fee Related EP1799998B1 (fr) 2004-10-09 2005-09-20 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US20090057444A1 (fr)
EP (1) EP1799998B1 (fr)
JP (1) JP4537457B2 (fr)
DE (2) DE102004049278A1 (fr)
WO (1) WO2006040247A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013225948A1 (de) * 2013-12-13 2015-06-18 Continental Automotive Gmbh Düsenkopf und Fluid-Einspritzventil
JP6292188B2 (ja) * 2015-04-09 2018-03-14 株式会社デンソー 燃料噴射装置
DE102016222606A1 (de) 2016-11-17 2018-05-17 Robert Bosch Gmbh Einspritzventil für Brennkraftmaschinen
US20200018276A1 (en) * 2018-07-16 2020-01-16 Continental Automotive Systems, Inc. Multi-dimple orifice disc for a fluid injector, and methods for constructing and utilizing same

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004881A1 (fr) * 1993-08-06 1995-02-16 Ford Motor Company Injecteur de carburant
EP1129739B1 (fr) * 1993-10-04 2008-08-13 Research International, Inc. Filtres micro-usines
US5489065A (en) * 1994-06-30 1996-02-06 Siemens Automotive L.P. Thin disk orifice member for fuel injector
JP3156554B2 (ja) * 1995-07-24 2001-04-16 トヨタ自動車株式会社 燃料噴射弁
DE19703200A1 (de) * 1997-01-30 1998-08-06 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19937961A1 (de) * 1999-08-11 2001-02-15 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung von Austrittsöffnungen an Ventilen
EP1184150A4 (fr) * 2000-03-09 2007-07-18 Toyo Tire & Rubber Co Procede de production de composite de resine de caoutchouc
US6742727B1 (en) * 2000-05-10 2004-06-01 Siemens Automotive Corporation Injection valve with single disc turbulence generation
JP3837283B2 (ja) * 2000-10-24 2006-10-25 株式会社ケーヒン 燃料噴射弁
US6817545B2 (en) * 2002-01-09 2004-11-16 Visteon Global Technologies, Inc. Fuel injector nozzle assembly
US6783085B2 (en) * 2002-01-31 2004-08-31 Visteon Global Technologies, Inc. Fuel injector swirl nozzle assembly
JP3933545B2 (ja) * 2002-08-27 2007-06-20 株式会社日本自動車部品総合研究所 燃料噴射ノズルおよびそれを用いた燃料噴射装置
US6789754B2 (en) * 2002-09-25 2004-09-14 Siemens Vdo Automotive Corporation Spray pattern control with angular orientation in fuel injector and method
DE112004000917T5 (de) * 2003-06-03 2007-10-11 Siemens Vdo Automotive Corporation, Auburn Hills Reduzierung der Kohlenwasserstoff-Emissionen durch Strahlungsbildungssteuerung mittels Regelung des Kraftstoffdrucks in Kraftstoffeinspritzsystemen
JP2005113815A (ja) * 2003-10-08 2005-04-28 Keihin Corp 燃料噴射弁
US7334746B2 (en) * 2004-03-08 2008-02-26 Continental Automotive Systems Us, Inc. Seat-lower guide combination

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006040247A1 *

Also Published As

Publication number Publication date
US20090057444A1 (en) 2009-03-05
JP4537457B2 (ja) 2010-09-01
EP1799998B1 (fr) 2009-11-25
JP2008516137A (ja) 2008-05-15
DE502005008594D1 (de) 2010-01-07
WO2006040247A1 (fr) 2006-04-20
DE102004049278A1 (de) 2006-04-13

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