EP2064438B1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP2064438B1
EP2064438B1 EP07802673A EP07802673A EP2064438B1 EP 2064438 B1 EP2064438 B1 EP 2064438B1 EP 07802673 A EP07802673 A EP 07802673A EP 07802673 A EP07802673 A EP 07802673A EP 2064438 B1 EP2064438 B1 EP 2064438B1
Authority
EP
European Patent Office
Prior art keywords
discharge openings
fuel injection
valve
valve seat
spray
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
EP07802673A
Other languages
German (de)
English (en)
Other versions
EP2064438A1 (fr
Inventor
Wolfgang Samenfink
Joerg Heyse
Michael Frank
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 EP2064438A1 publication Critical patent/EP2064438A1/fr
Application granted granted Critical
Publication of EP2064438B1 publication Critical patent/EP2064438B1/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
    • 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
    • F02M61/184—Discharge orifices having non circular sections
    • 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • 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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • the perforated disc has a plurality of ejection openings, wherein an inflow opening immediately upstream of the ejection openings is designed such that an inflow of the ejection openings takes place from radially inward to radially outward.
  • the ejection openings are triangular or trapezoidal in shape and taper in the radial direction to the outside.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that in a simple manner on the one hand a super atomization of the fuel is achieved and on the other hand, the exhaust emissions of an internal combustion engine are effectively reduced significantly.
  • fuel sprays are sprayed from the fuel injection valve, which are equipped with areas of different droplet size, larger droplets in an outer region form a jacket envelope and smaller droplets fill the inner region of a hollow cone lamella. This is achieved by the specific geometry and orientation of the ejection openings in conjunction with the horizontal flow.
  • the outer droplets of the sprayed-off fuel sprays strike down as wall film on the Saugrohrwandache.
  • an inflow opening with an inflow cavity which is larger than an exit opening downstream of the valve seat, is provided in the valve seat body upstream of the ejection openings.
  • 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 with the upper boundary of the inflow opening covers the ejection openings of the perforated disk.
  • the ejection openings are oriented so that they taper radially outward from an inlet edge for the flow.
  • the spray orifices are characterized in that by maximizing the effective separation edge, whereby a desired increased separation effect of the flow in the spray orifices and thus the desired droplet distribution is achieved.
  • FIG. 1 a partially illustrated injection valve
  • FIG. 2 the perforated disk increases in a section with a schematic clarification of the droplet distribution to form a hollow disk spray
  • FIG. 3 a first embodiment of a perforated disc in a plan view
  • FIG. 4 the detail IV in FIG. 3 as a first injection opening
  • FIG. 5 A second embodiment of a spray-discharge opening
  • FIG. 6 A third embodiment of a spray-discharge opening
  • FIG. 7 A fourth embodiment of a spray-discharge opening
  • FIG. 8 A fifth embodiment of a spray-discharge opening
  • FIG. 9 a sixth embodiment of a spray opening
  • FIG. 10 a valve end with a perforated disc to form a two-jet spray consisting of two full-disk sprays, where it bai FIG. 10 is an example of a non-claimed item.
  • 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.
  • 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.
  • a valve seat body 16 is tightly mounted, for example by welding. At its valve end body 7 facing away, lower end face 17 of the valve seat body 16 is stepped, with a flat, eg single-layer perforated disc 23 is fixed to the end face 17.
  • the perforated disc 23 has at least four, but ideally eight to forty injection orifices 25.
  • an inflow opening 28 is provided in the valve seat body 16, via which the individual ejection openings 25 are flown.
  • the inflow opening 28 in this case has a diameter which is greater than the opening width of the outlet opening 27 in the valve seat body 16, from which the fuel flows into the inflow opening 28 and ultimately into the ejection openings 25.
  • the inflow opening 28 is designed in the immediate inflow region of the injection openings 25 so that the flow is largely at right angles to the longitudinal extent of the injection openings 25, in the FIG. 1 So horizontally corresponding to the spray openings 25 passes.
  • the connection of valve seat body 16 and perforated disc 23 is effected, for example, by a circumferential and dense, formed by a laser weld 26, which is placed outside of the inflow opening 28.
  • 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 the 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 ejection openings 25 of the perforated disc 23 are in direct flow communication with the inflow opening 28 and are covered by the upper boundary of the inflow opening 28. In other words, there is a complete offset of the inlet opening 27 and the ejection openings 25 defining the inlet of the inflow opening 28. Due to the radial offset of the ejection openings 25 with respect to the outlet opening 27 results in an S-shaped flow pattern of the medium, here the fuel.
  • the fluid is additionally positively influenced in its atomization by the specific geometry of the ejection openings 25 in connection with the horizontally inflatable inflow opening 28, wherein a hollow lamellar spray with areas of different droplet size is achievable, with larger droplets forming a sheath envelope in an outer area 35 and smaller Droplets fill the inner portion 36 of the Hohlkegellamelle.
  • FIG. 2 again schematically the S-shaped curve in the area of the perforated disc 23 is shown enlarged in a section, wherein by means of this Anströmungsart in conjunction with a special design and alignment of the ejection openings 25 according to the invention a special droplet distribution within a hollow disc spray is possible.
  • FIG. 3 shows a first embodiment of a perforated disc 23 in a plan view.
  • twelve ejection openings 25 are provided, which are arranged annularly on the perforated disc 23.
  • the contour of the ejection openings 25 is triangular. In cross-section, for example, each ejection opening 25 has the shape of an equilateral triangle. All triangular spray-discharge openings 25 are aligned in such a way that the horizontal flow, which flows radially outward from the center of the perforated disc 23, meets the spray-discharge openings 25 at a relatively large leading edge 38. Starting from this leading edge 38, the ejection openings 25 taper radially outward or are constricted in the radial direction.
  • the arrows 37 are intended on the one hand indicate that the flow of the spray openings 25 is horizontal to their entry or substantially at right angles to the longitudinal extent of the spray openings 25 and on the other hand show how the spray opening 25 is aligned with its large leading edge 38 to the valve longitudinal axis 2.
  • the ejection openings 25 are distinguished insofar by maximizing the effective detachment edge, whereby a desired increased separation effect of the flow in the ejection openings 25 and thus the desired droplet distribution is achieved.
  • injection orifices 25 are shown, wherein in FIG. 4 the detail IV off FIG. 3 is shown.
  • the ejection openings 25 are contoured in such a way that there is always a tapering of the ejection openings 25 on the side facing away from the inflow side, ie radially outward. Due to the horizontal flow of the ejection openings 25, the flow in the ejection openings 25 is directional diffusely, ie the exiting fluid jet fanning out immediately after leaving the ejection opening 25, but is constricted again by the particular contouring of the ejection openings 25 in the radially outer region 35.
  • the contours of the ejection openings 25 can be triangular ( FIG. 4 ), truncated triangular ( FIG. 5 ), semicircular ( FIG. 6 ) or semi-elliptic, truncated semicircular ( FIG. 7 ) or truncated semi-elliptic, rounded truncated triangular ( FIG. 8 ), semicircular or semi-elliptic with rounded leading edge 38 (FIG. FIG. 9 ) or similar.
  • FIG. 10 is a valve end with a perforated disc 23 for forming a two-jet spray consisting of two full-blade sprays shown very schematically.
  • the according to FIGS. 1 to 7 described inflow and Abspritzö Stammsgeometrien be twice distributed independently be introduced on the perforated disc 23.
  • corresponding flow channels are necessary in the region of the valve seat body 16, which transport the fluid from the outset into the two desired spray areas, from where the flow can reach the spray openings 25 by way of the previously described principle via inlet edges 38.
  • full-disk sprays with a suitable design of the spray-discharge openings 25 and two hollow disc sprays in duplication of the example according to FIG. 2 be generated.
  • Such a fuel injection valve is particularly suitable for the spraying of fuel in the direction of two intake valves.
  • the perforated disc 23 can be manufactured by microgalvanic, laser cutting, etching or punching technology.
  • the cross-section of the ejection openings 25 is constant or increasing in the flow direction over the entire length of the ejection openings 25, depending on the production method or desired use.

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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 (5)

  1. Soupape d'injection de carburant pour systèmes 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 peut être déplacé 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 plusieurs ouvertures de pulvérisation, les ouvertures de pulvérisation (25) étant disposées sous forme annulaire et les ouvertures de pulvérisation (25) présentant une arête d'entrée (28), depuis laquelle les ouvertures de pulvérisation (25) se rétrécissent radialement vers l'extérieur,
    caractérisée en ce que les ouvertures de pulvérisation (25) sont disposées,et orientées de telle sorte qu'au moins un jet lamellaire creux puisse être pulvérisé, dans lequel une région radialement extérieur (35) est constituée de gouttelettes plus grosses que dans une région radialement intérieure (36) du jet, et en ce qu'une ouverture d'afflux (28) directement en amont des ouvertures de pulvérisation (25) est conçue de telle sorte qu'un écoulement vers les ouvertures de pulvérisation (25) radialement depuis l'intérieur vers l'extérieur radialement se produise essentiellement à angle droit par rapport à l'étendue longitudinale des ouvertures de pulvérisation (25).
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que huit à quarante ouvertures de pulvérisation (25) sont prévues pour former un jet de carburant.
  3. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que les contours des ouvertures de pulvérisation (25) sont triangulaires, triangulaires tronqués, semi-circulaires, semi-elliptiques, semi-circulaires tronqués, semi-elliptiques tronqués, triangulaires tronqués et arrondis, semi-circulaires ou semi-elliptiques avec une arête d'entrée arrondie (38).
  4. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que l'ouverture d'afflux (28) est prévue sur le côté frontal inférieur (17) du corps de siège de soupape (16).
  5. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que le disque perforé (23) peut être fabriqué au moyen d'une électrodéposition galvanique de métal, d'une technique de découpage au laser, ou d'une technique d'estampage.
EP07802673A 2006-09-05 2007-08-17 Soupape d'injection de combustible Not-in-force EP2064438B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006041475A DE102006041475A1 (de) 2006-09-05 2006-09-05 Brennstoffeinspritzventil
PCT/EP2007/058553 WO2008028786A1 (fr) 2006-09-05 2007-08-17 Soupape d'injection de combustible

Publications (2)

Publication Number Publication Date
EP2064438A1 EP2064438A1 (fr) 2009-06-03
EP2064438B1 true EP2064438B1 (fr) 2012-10-31

Family

ID=38787707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07802673A Not-in-force EP2064438B1 (fr) 2006-09-05 2007-08-17 Soupape d'injection de combustible

Country Status (5)

Country Link
US (1) US20090321540A1 (fr)
EP (1) EP2064438B1 (fr)
JP (1) JP5222294B2 (fr)
DE (1) DE102006041475A1 (fr)
WO (1) WO2008028786A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008042116B4 (de) * 2008-09-15 2019-12-24 Robert Bosch Gmbh Ventil, zum Zerstäuben von Fluid
JP5295311B2 (ja) * 2011-06-09 2013-09-18 三菱電機株式会社 燃料噴射弁
CN102410121A (zh) * 2011-09-08 2012-04-11 何林霏 S型雾化喷嘴
JP5959892B2 (ja) 2012-03-26 2016-08-02 日立オートモティブシステムズ株式会社 火花点火式燃料噴射弁
US20150014448A1 (en) * 2013-07-12 2015-01-15 Delphi Technologies, Inc. Valve seat for gaseous fuel injector
EP3184799A1 (fr) * 2015-12-22 2017-06-28 Continental Automotive GmbH Corps de buse pour un injecteur de fluide et injecteur de fluide
JP6339628B2 (ja) * 2016-06-22 2018-06-06 日立オートモティブシステムズ株式会社 燃料噴射弁
CN113153595B (zh) * 2021-03-28 2022-02-25 南岳电控（衡阳）工业技术股份有限公司 低液压旋流喷射器

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DE4409848A1 (de) * 1994-03-22 1995-10-19 Siemens Ag Vorrichtung zur Zumessung und Zerstäubung von Fluiden
JP4009889B2 (ja) * 1999-02-16 2007-11-21 株式会社デンソー 燃料噴射弁
JP2001046919A (ja) * 1999-08-06 2001-02-20 Denso Corp 流体噴射ノズル
JP2001317434A (ja) * 2000-02-22 2001-11-16 Hitachi Ltd 内燃機関の燃料噴射方法および燃料噴射装置
US6588399B2 (en) * 2000-02-22 2003-07-08 Hitachi, Ltd. Fuel injection method of internal combustion engine and fuel injection apparatus of internal combustion engine
EP1128062B1 (fr) * 2000-02-25 2006-04-26 Denso Corporation Tuyère d'injection de fluide
JP2001263206A (ja) * 2000-03-17 2001-09-26 Denso Corp 燃料噴射弁
JP2001317431A (ja) * 2000-02-25 2001-11-16 Denso Corp 流体噴射ノズル
US6817545B2 (en) * 2002-01-09 2004-11-16 Visteon Global Technologies, Inc. Fuel injector nozzle assembly
JP3751264B2 (ja) * 2002-06-19 2006-03-01 株式会社ケーヒン 燃料噴射弁
US6966505B2 (en) * 2002-06-28 2005-11-22 Siemens Vdo Automotive Corporation Spray control with non-angled orifices in fuel injection metering disc and methods
US6929197B2 (en) * 2002-09-25 2005-08-16 Siemens Vdo Automotive Corporation Generally circular spray pattern control with non-angled orifices in fuel injection metering disc and method
DE10350548A1 (de) * 2003-10-29 2005-06-02 Robert Bosch Gmbh Brennstoffeinspritzventil
JP4030529B2 (ja) * 2004-06-21 2008-01-09 株式会社ケーヒン 燃料噴射弁
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US7198207B2 (en) * 2004-11-05 2007-04-03 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle

Also Published As

Publication number Publication date
JP5222294B2 (ja) 2013-06-26
JP2010501784A (ja) 2010-01-21
WO2008028786A1 (fr) 2008-03-13
EP2064438A1 (fr) 2009-06-03
DE102006041475A1 (de) 2008-03-06
US20090321540A1 (en) 2009-12-31

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