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EP2064438A1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible

Info

Publication number
EP2064438A1
EP2064438A1 EP07802673A EP07802673A EP2064438A1 EP 2064438 A1 EP2064438 A1 EP 2064438A1 EP 07802673 A EP07802673 A EP 07802673A EP 07802673 A EP07802673 A EP 07802673A EP 2064438 A1 EP2064438 A1 EP 2064438A1
Authority
EP
European Patent Office
Prior art keywords
ejection openings
fuel injection
spray
injection valve
valve seat
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
EP07802673A
Other languages
German (de)
English (en)
Other versions
EP2064438B1 (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

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
    • 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.
  • a fuel injection valve is already known in which a perforated disk 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 disk, 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 separated from the Covered upper limit of the inflow opening. In other words, there is a complete offset from the outlet opening defining the inlet of the inflow opening and the outlet openings.
  • outlet openings Due to the radial offset of the outlet openings relative to the outlet opening in the valve seat body results in an S-shaped flow pattern of the fuel, which represents a zers täubung sf ordering measure.
  • the outlet openings have a round or elliptical cross section.
  • 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 regions of different droplet size, larger droplets form a Mantelumhüllende in an outer region and smaller droplets fill the inner region of a hollow or full cone lamella. This is achieved by the specific geometry and orientation of the ejection openings in conjunction with the horizontal flow.
  • 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-blow is achieved in the flow for atomization improvement of the fuel, 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 shows a partially illustrated injection valve
  • Figure 2 shows the perforated disc enlarged in a section with a schematic clarification of the droplet distribution to form a Hohllamellensprays
  • Figure 3 shows a first embodiment of a perforated disc in a plan view
  • Figure 4 shows the detail IV in Figure 3 as a first 6 shows a third embodiment of a spray-discharge opening
  • FIG. 7 shows a fourth exemplary embodiment of a spray-discharge opening
  • FIG. 8 shows a fifth exemplary embodiment of a spray-discharge opening
  • FIG. 9 shows a sixth exemplary embodiment of a spray-discharge opening
  • 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.
  • Injector is a schematically indicated electromagnetic circuit with a magnetic coil 10, an armature 11 and a core 12.
  • the armature 11 is connected to the valve closing body 7 facing away from the end of the valve needle 5 by e.g. a trained by a laser weld and aligned with the core 12.
  • valve seat carrier 1 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 flat, e.g. 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
  • Spray openings 25 As an extension of a downstream of a valve seat surface 29 formed outlet opening 27, 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 spray-discharge openings 25 so that the flow reaches the spray-discharge openings 25 substantially at right angles to the longitudinal extension of the spray-discharge openings 25, ie horizontally in FIG.
  • 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 depth of insertion 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 magnetic coil 10 by the system of
  • Valve closing body 7 is fixed to the downstream conically tapered valve seat surface 29 of the valve seat body 16.
  • 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 spray openings 25 with respect to the outlet opening 27 results in an S-shaped flow s course 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 is again schematically the S-shaped curve in the area of the perforated disc 23 is shown enlarged in a section, said 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.
  • each ejection opening 25 is in 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 ejection openings 25 is horizontal to their entry or substantially perpendicular to the longitudinal water extension 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.
  • Spray openings 25 are shown, wherein in Figure 4, the detail IV of Figure 3 is shown.
  • the ejection openings 25 are contoured such that there is always a taper of the ejection openings 25 on the side facing away from the inflow side, that is, 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. By the instant fanning becomes that the liquid surface tension contracts the emergent jet into a cylindrical, smaller, free surface jet.
  • the increased free radiation surface in the interior favors the further disintegration into smaller droplets, while in relation thereto comparatively large droplets remain in the outer region 35 of the hollow cone lamella as sheath enveloping.
  • the contours of the ejection openings 25 may be triangular ( Figure 4), truncated triangular ( Figure 5), semicircular ( Figure 6) or semi-elliptic, truncated semicircular ( Figure 7) or truncated semi-elliptic, rounded truncated triangular (Figure 8), semicircular or semi-elliptic with rounded Be the leading edge 38 ( Figure 9) or similar.
  • FIG. 10 a valve end with a perforated disc 23 for forming a two-jet spray consisting of two full-disk sprays is shown very schematically.
  • the inflow and spray orifice geometries described in FIGS. 1 to 7 must be introduced into the perforated disc 23 in a doubly distributed manner, independently of each other.
  • 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.
  • two hollow disk sprays can also be generated by doubling the example according to FIG. 2 with a corresponding design of the spray-discharge openings 25.
  • 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.

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

La soupape d'injection de combustible selon l'invention se distingue par le fait qu'un disque perforé (23), comprenant plusieurs orifices de pulvérisation (25), est disposé en aval d'un corps de siège de soupape (16) présentant un siège de soupape (29) fixe. Immédiatement en amont des orifices de pulvérisation (25), un orifice d'admission (28) est prévu comme cavité d'entrée. L'orifice d'admission (28) est étudié de manière à ce qu'un flux des orifices de pulvérisation (25) s'effectue largement à angle droit par rapport à l'étendue longitudinale des orifices de pulvérisation (25). Les orifices de pulvérisation (25) sont disposés et orientés de manière à ce qu'au moins un jet de combustible puisse être pulvérisé en forme de cône creux ou de cône plein, dans lequel une zone (35) radialement à l'extérieur se compose de gouttelettes plus grosses qu'une zone (36) radialement à l'intérieur du jet, ce qui permet de réduire les valeurs des émissions de gaz d'échappement, notamment lors d'un démarrage à froid d'un moteur à combustion interne. La soupape d'injection de combustible convient particulièrement à un usage dans des installations d'injection de combustible de moteurs à combustion interne à allumage commandé par compression.
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 true EP2064438A1 (fr) 2009-06-03
EP2064438B1 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)

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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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Also Published As

Publication number Publication date
DE102006041475A1 (de) 2008-03-06
WO2008028786A1 (fr) 2008-03-13
EP2064438B1 (fr) 2012-10-31
JP2010501784A (ja) 2010-01-21
JP5222294B2 (ja) 2013-06-26
US20090321540A1 (en) 2009-12-31

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