EP1836387A1 - Buse a jets multiples en eventail et soupape d'injection de carburant pourvue d'une telle buse - Google Patents

Buse a jets multiples en eventail et soupape d'injection de carburant pourvue d'une telle buse

Info

Publication number
EP1836387A1
EP1836387A1 EP05811079A EP05811079A EP1836387A1 EP 1836387 A1 EP1836387 A1 EP 1836387A1 EP 05811079 A EP05811079 A EP 05811079A EP 05811079 A EP05811079 A EP 05811079A EP 1836387 A1 EP1836387 A1 EP 1836387A1
Authority
EP
European Patent Office
Prior art keywords
jet nozzle
fan jet
spray
fuel injection
fan
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
EP05811079A
Other languages
German (de)
English (en)
Other versions
EP1836387B1 (fr
Inventor
Volker Holzgrefe
Stefan Arndt
Christian Heinen
Markus Gesk
Armin Schülke
Guenter Dantes
Joerg Heyse
Andreas Krause
Kai Gartung
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 EP1836387A1 publication Critical patent/EP1836387A1/fr
Application granted granted Critical
Publication of EP1836387B1 publication Critical patent/EP1836387B1/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
    • F02M61/1806—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
    • F02M61/1853—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
    • 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
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto

Definitions

  • Multi-fan jet nozzle and fuel injector with multi-fan jet nozzle are Multi-fan jet nozzle and fuel injector with multi-fan jet nozzle
  • the invention is based on a multi-fan jet nozzle according to the preamble of claim 1 and of a fuel injection valve according to the preamble of claim 7.
  • a fuel injection valve is already known, in which downstream of the valve seat surface a perforated disc is provided, which has a plurality of spray-discharge openings.
  • the —igerweise ten to twenty spray orifices are located in a plane of the perforated disc, which is perpendicular to the valve longitudinal axis.
  • the largest part of the ejection openings is obliquely or inclined introduced into the perforated disc, so that the opening axes of the ejection openings have no parallelism to the valve longitudinal axis. Since the inclinations of the ejection openings can be chosen differently, a divergence of the individual jets to be sprayed is easily achievable.
  • the ejection openings are introduced, for example, by laser drilling in the perforated disk in a largely uniform size.
  • the fuel injector is particularly suitable for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • a fuel injection valve is already known, in which a slot-shaped outlet opening is provided at the downstream end.
  • the outlet opening is formed either in a perforated disc or directly in the nozzle body itself.
  • the slot-shaped outlet openings are always introduced centrally on the valve longitudinal axis, so that the injection of the fuel takes place axially parallel from the fuel injection valve out.
  • a swirl groove is provided, which sets the fuel flowing to the valve seat in a circular rotational movement.
  • the flat outlet opening ensures that the fuel is hosed fan-like.
  • a fuel injection valve for direct injection of fuel into a combustion chamber of an internal combustion engine from US Pat. No. 6,019,296 A, in which a slot-shaped outlet opening is provided at the downstream end, from which fuel can emerge at an angle to the valve longitudinal axis.
  • the multi-fan jet nozzle according to the invention with the characterizing features of claim 1 has the advantage that it can be sprayed with her very atomizing fluid sprays. Over the very narrow spray-discharge slots, a multiplicity of fan-shaped beams are generated, which for the time being leave the multi-fan-jet nozzle parallel to one another and disintegrate into small droplets at a distance from the multi-fan-jet nozzle.
  • upstream collisions of partial flows of the fluid take place upstream of the spray-discharge slots. The collisions take place transversely to the slot direction of the spray-discharge slots.
  • fan-shaped spreading of the flow occurs in the spray-discharge slots.
  • When leaving the ejection slots arise from the divergent flow plane fan beams, which thicken greatly by their spreading and disintegrate at a certain decay distance into correspondingly small droplets.
  • Numbers of exactly reproducible spray-discharge slots with filigree opening structures such as Slot widths of about 20 to 100 .mu.m, in particular 20 to 50 microns, and slot lengths of up to 1 mm, in particular less than 150 microns produced.
  • the fuel injection valve according to the invention with the characterizing features of claim 7 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 fluid droplets.
  • the multi-fan jet nozzle has at the downstream end of the Fuel injector a variety of very small direction parallel spray-discharge slots, so that fuel sprays with extremely small fuel droplets with a Sauter Mean Diameter (SMD) of about 20 microns can be sprayed off. In this way, the HC emission of the internal combustion engine can be significantly reduced significantly.
  • SMD Sauter Mean Diameter
  • the multi-fan jet nozzle is a micro-hole disk having a plurality of very small spray-discharge slots each having a slot width of about 20 to 100 ⁇ m each.
  • the spray-discharge slots are arranged in parallel, lined up in a line and as evenly as possible over a large area over a large area. arched nozzle area distributed. Due to this division, the flow rate to be atomized per individual spray slot is correspondingly small.
  • FIG. 1 shows a partially illustrated valve in the form of a fuel injection valve with an embodiment of a multi-fan jet nozzle in a sectional view
  • Figure 2 shows the valve end with the multi-fan jet nozzle of Figure 1 in a rotated by 90 ° sectional view
  • Figure 3 4 shows the multi-fan jet nozzle in a view according to FIG. 1
  • FIG. 5 shows the multi-fan jet nozzle in a bottom view
  • FIG. 6 shows a second embodiment of a multi-fan jet nozzle.
  • 7 shows the multi-fan jet nozzle according to FIG. 6 in a side view
  • FIG. 8 shows a third embodiment of a multi-fan jet nozzle in a bottom view
  • FIG. 9 shows a fourth embodiment of a multi-fan jet nozzle in a bottom view
  • FIG. 10 shows a first symbolic tool for producing a multi-fan jet nozzle
  • FIG. 11 shows a second symbolic tool for manufacturing
  • 12 shows a section through a microgalvanically produced fifth multi-fan jet nozzle
  • FIG. 13 shows a sectional view of a section along the line XIII-XIII in FIG. 12
  • FIG. 14 shows a sixth embodiment of a multi-fan jet nozzle
  • FIG. 15 shows a section through a seventh embodiment of a multi-fan jet nozzle along one of the - A -
  • FIG. 16 shows a section through an eighth embodiment of a multi-fan jet nozzle along a sectional plane corresponding to FIG. 13 and
  • FIG. 17 shows a cross section through a single-layer galvanically deposited multi-fan jet nozzle in the region of a spray-discharge slot.
  • FIG. 1 is shown as an embodiment, a valve in the form of an injection valve for fuel injection systems of mixture-compression spark-ignition internal combustion engines partially.
  • the fuel 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 fuel injection valve takes place in a known manner, for example electromagnetically.
  • An actuation of the fuel injection valve with a piezoelectric or magnetostrictive actuator is also conceivable.
  • 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.
  • a multi-fan jet nozzle 23 is attached as an atomizer.
  • the connection of valve seat body 16 and multi-fan jet nozzle 23 takes place for example by a circumferential and dense, formed by a laser weld 26, which is provided for example on the end face 17 or on the outer periphery of the valve seat body 16 and multi-fan jet nozzle 23.
  • the multi-fan jet nozzle 23 is undergested by a support plate 25.
  • the support disk 25 is annular in order to receive a central dome-shaped or domed nozzle-like nozzle region 28 of the multi-fan jet nozzle 23 in an inner opening.
  • the insertion depth of the valve seat body 16 with the multi-fan jet nozzle 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 contact of the valve closing body 7 at a downstream conically tapered Valve seat surface 29 of the valve seat body 16 is fixed.
  • 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.
  • an outlet opening 27 is provided, from which the fuel to be sprayed enters a flow cavity 24, which is formed by the curved or kalottêtieri formation of the nozzle portion 28 of the multi-fan jet nozzle 23.
  • the multi-fan jet nozzle 23 has e.g. in the region of the valve longitudinal axis 2 their greatest distance to the end face 17, while in the region of the weld 26, the multi-fan jet nozzle 23 as a thin disc without buckling directly against the valve seat body 16 and is stabilized by the support plate 25.
  • a sufficiently pressure-stable and thick design of the mikrogalvanisch produced multi-fan jet nozzle 23 can be completely dispensed with a support plate 25. The formation of the nozzle region 28 becomes clear above all in FIGS. 3 to 5.
  • a multiplicity of very small spray-discharge slots 30 are provided in the multi-fan jet nozzle 23 and in particular in its nozzle region 28, which run in the direction parallel to one another.
  • the spray-discharge slots 30 have a slot width of approximately 20 to 100 .mu.m, in particular 20 to 50 .mu.m, and a slot length of up to 1 mm, in particular less than 150 .mu.m, so that fuel sprays with extremely small
  • Fuel droplets with a Sauter Mean Diameter (SMD) of about 20 microns can be sprayed off. In this way, the HC emission of the internal combustion engine can be reduced significantly over known injection arrangements very effectively.
  • Pro multi-fan jet nozzle 23 are provided between two and sixty spray-discharge slots 30, wherein a number of eight to forty spray-discharge slots 30 brings optimal atomization results.
  • FIG. 2 shows the downstream valve end of the fuel injection valve with the multi-fan jet nozzle 23 according to FIG. 1 in a side view rotated by 90 °. It is particularly clear that the central nozzle region 28 has an elongated elliptical shape. While the sprayed fuel spray in its longitudinal orientation according to FIG. has an outer angle ß with about 15 °, an outer angle ⁇ of the fuel spray in its transverse orientation according to Figure 2 is about 30 °. Via the nozzle region 28 with the many spray-discharge slots 30, therefore, a fuel spray with elliptical jet cross-section is emitted, which disintegrates into very fine droplets.
  • the multi-fan jet nozzle 23 is shown in side views according to Figures 1 and 2 and in a bottom view again as a single component.
  • the spray-discharge slots 30 are arranged centrally in the nozzle region 28 and are each formed with identical size and shape.
  • Two adjacent spray-discharge slots 30 have e.g. a distance of about 40 to 300 microns. The distance from slot center to slot center is thus about 100 to 400 microns.
  • the multi-fan jet nozzle 23 is advantageously produced microgalvanically in a galvanic layer.
  • the spray-discharge slots 30 have walls running perpendicularly to the surface of the pane as a result of this manufacturing technology.
  • the central nozzle region 28 with the spray-discharge slots 30 is after the galvanic production of the disc, e.g. embossed technically.
  • FIGS. 10 and 11 symbolically show two embossing tools 32, 33 for producing the nozzle area 28 of the multi-fan jet nozzle 23, wherein the tool 32 shown in FIG. 10 is annular or partially annular and the tool 33 shown in FIG. is executed partially elliptical. In this case, the curvature of the nozzle region 28 is shaped convexly in the direction of ejection.
  • the disc of the multi-fan jet nozzle 23 is made of nickel, which is very ductile, so it can be easily deformed during embossing without material cracks.
  • the curvature of the nozzle portion 28 has an elliptical cross section in the bottom view.
  • the spray-discharge slots 30 are, for example, equidistant and parallel to one another lined up.
  • the longitudinal axes of the spray-discharge slots 30 are perpendicular to the longitudinal axis of the ellipse.
  • the curvature of the nozzle area 28 has along its width a smaller radius of curvature (for example 0.25 mm) than the radius of curvature along its length (for example 10 mm), as FIGS. 3 and 4 illustrate.
  • the spray-discharge slots 30 extend with their longitudinal axes along the greater curvature and are therefore strongly convexly curved in the direction of discharge.
  • the flow exiting per spray slot 30 emerges as a flat jet fan due to this curvature (FIG. 2).
  • the fan-out angle ⁇ results from the curvature and the run length of the spray-discharge slots 30.
  • Each jet fan emerges perpendicular to the surface of the curvature. Consequently, a uniform directional spread is achieved between the individual fan sheds.
  • the entire spread angle corresponds to the beam angle ⁇ (FIG. 1).
  • the beam angles ⁇ and ⁇ determine the cross section of the total beam and can be varied as desired.
  • the aspect ratio of the total beam can be customized, for example, to the geometry of a suction tube.
  • FIG. 17 shows a cross section through a single-layer galvanically deposited multi-fan jet nozzle 23 in the region of a spray-discharge slot 30, in which the walls of the spray-discharge slot 30 do not run vertically, but curved in a trumpet shape over the entire boundary of the spray-discharge slot 30.
  • the production Such a multi-fan jet nozzle 23 takes place in such a way that first two photoresist layers are deposited onto one another on a substrate body.
  • the second lacquer layer is applied only after the masking, exposure and patterning of the first lacquer layer. After masking, exposing and patterning the second lacquer layer, both lacquer layers are developed in one step, i. Unexposed areas of the paint layers are removed by wet-chemical means.
  • the paint tower has a much larger width than in the second coat of paint, which, however, is applied in much greater height.
  • metal is electroplated onto the substrate body around the paint towers in a one-step process.
  • the electroplating layer initially grows up from the substrate body on the first lacquer layer, and overgrows this first lacquer layer on its surface until the electroplating layer completely touches the circumference of the second lacquer layer.
  • the electroplating is stopped in the moment in which the circumference of the second Lackhus a small galvanic layer thickness is present.
  • the overgrowth of the first lacquer layer results in a funnel-shaped indentation in the electroplating layer ("lateral overgrowth") around the second lacquer layer in the region of each coater tower, and this indentation on each coater tower forms a diverging part of the respective spray-discharge slot 30.
  • a single-ply multi-fan jet nozzle 23 After removal of the paint towers ("stripping") and the substrate body, there is a single-ply multi-fan jet nozzle 23 with a plurality of spray-discharge slots 30.
  • the spray-discharge slots 30 of the multi-fan jet nozzle 23 are in the installed state
  • the narrowest width of the spray-discharge slot 30 is in the range of approximately 30 to 100 .mu.m
  • a support disk 25 can be completely dispensed with
  • two paint layers produce spray-discharge slots 30 which, downstream of their narrowest width, have enlarged discharge contours which form a type of slot-shaped frame around each spray-discharge slot 30 in a bottom view of the spray-discharge slots 30.
  • FIG. 6 shows a second embodiment of a multi-fan jet nozzle 23 in a bottom view and in FIG. 7 the multi-fan jet nozzle 23 according to FIG. 6 is shown in a side view.
  • This is an obliquely spraying multi fan jet nozzle 23.
  • the jet structure is tilted by an angle ⁇ . This is achieved in that all spray-discharge slots 30 are arranged with their center off-center with respect to the longitudinal axis of the ellipse of the nozzle region 28. In the exemplary embodiment shown, all spray-discharge slots 30 have the same center offset.
  • the embodiment according to FIG. 5 can be varied in such a way that the curvature of the
  • Nozzle portion 28 is placed with the spray-discharge slots 30 eccentrically on the multi-fan jet nozzle 23, but the spray-discharge slots 30 are arranged centrally on the curvature of the nozzle portion 28.
  • the transverse flow of the curvature of the nozzle region 28 also generates a ⁇ angle of the sprayed-off spray here.
  • Figures 8 and 9 show a third and fourth embodiment of a multi-fan jet nozzle 23 in a bottom view.
  • the entire cross section of the nozzle region 28 is designed H-shaped.
  • the H-shape is formed from two mutually parallel curvatures, which corresponds in each case, for example, a curvature known from FIG.
  • the injection slots 30 are arranged in these two curvatures of the nozzle portion 28. So that individual fan beams do not touch out of the two bulges outside the fuel injection valve, the spray-discharge slots 30 are offset from one another in the middle between the two curvatures. Both vaults are connected by a third transverse curvature.
  • the third curvature is centric to the outlet opening 27, receives the fuel coming from the outlet opening 27 and distributes it to the two occupied with the spray-discharge slots 30 vaults, from where the fuel is sprayed.
  • the spray-discharge slots 30 can be provided over the entire length of the bulges (FIG. 8) or only in partial regions of the bulges (FIG. 9). With the example of the multi-fan jet nozzle 23 shown in FIG. 9, a beam gap can be generated. The entire beam formation takes one
  • Two-beam characteristic which may be advantageous for internal combustion engines with two intake valves per cylinder.
  • FIG. 12 shows a section through a microgalvanized fifth multi-fan jet nozzle 23, which is attached to a valve seat body 16.
  • the multi-fan jet nozzle 23 is constructed from two structural planes 35, 36.
  • Figure 13 is a sectional view of a section along the line XIII-XIII in Figure 12, whereby a plan view of the spray-discharge slots 30 is made possible.
  • the multi-fan jet nozzle 23 has a continuous disk-shaped design without bulges in a special nozzle region 28.
  • the spray-discharge slots 30 of the lower structural plane 36 are generally below cross-sections of the upper structural plane 35.
  • the spray-discharge slots 30 are centered at their longitudinal axes and at right angles to an axis of symmetry 37 and are arranged along this axis of symmetry 37 in series parallel to one another Normally equidistant from each other.
  • each spray-discharge slot 30 is fed from two adjacent flow channels 38 (see arrows in FIG. 13). Consequently, there is a frontal collision of two partial flows from two opposite directions centrally and upstream of the injection slots 30. The collision takes place transversely to the slot direction of the spray-discharge slot 30. As a reaction arise in the Spray-discharge slots 30 fan-shaped spreading of the flow.
  • the flow channels 38 of the upper structural plane 35 form a cross-shaped grid, which consists on the one hand of parallel to the spray-discharge slots 30 extending supply channels 39, on the other hand, perpendicular to this inflow channels 40 connect.
  • material walls of the upper structural plane 35 do not run directly in alignment with the walls of the spray-discharge slots 30 in the lower structural plane 36, but with a slight offset to the outside, so that the spray-discharge slots 30 can be flowed on all sides.
  • FIG. 14 illustrates, with a sixth embodiment of a multi-fan jet nozzle 23 in a partial bottom view, that the spray-discharge slots 30 can also be arranged off-center with offset regular, irregular, one-sided or alternating with respect to the axis of symmetry 37.
  • the micro-galvanic production of the multi-fan-jet nozzle 23 takes place in such a way that first the upper structural plane 35 is deposited and subsequently the lower structural plane 36.
  • the electroplating is started on a flat, electrically conductive base (substrate).
  • a first photoresist layer is applied.
  • This is followed by a selective exposure of the first photoresist layer by means of UV light and a partial, structured cover by a photomask.
  • the structure of the later structural plane 35 is depicted.
  • a sputter layer is then applied flat. Subsequently, a second photoresist layer is applied.
  • Substrate staged at the sites paint structures are where later ⁇ ffhungs Modellen within the multi-fan jet nozzle 23 should be present. This is followed by galvanizing. As soon as the electroplating in the structural plane 35 exceeds the thickness of the photoresist layer, it comes into electrical contact with the sputtering layer lying on this photoresist layer. On the Sputtering layer is started from this time the electroplating growth. The electroplating is stopped before it has reached the top of the photoresist layer belonging to the structural plane 36. Finally, the electroplated layer is detached from the substrate and the photoresist is dissolved out.
  • FIG. 15 shows a section through a seventh embodiment of a multi-fan jet nozzle 23 along a sectional plane corresponding to FIG.
  • the relative position of the multi-fan jet nozzle 23 to the valve seat body 16 is indicated by the drawing of the outlet opening 27.
  • a large-area flow channel 38 is provided here, which in turn resembles the shape of an H.
  • Two mutually parallel rows of spray-discharge slots 30 are accommodated in the lower structural plane 36. Both rows are offset with respect to their subdivision into spray-discharge slots 30. It is adjusted in an advantageous manner, a center offset, in which the spray-discharge slots 30 of one row are centrally offset to those of the other row. This avoids that the fan beams emerging from both rows unite at some distance from the multi-fan jet nozzle 23. Both rows are e.g. arranged symmetrically to the center of the multi-fan jet nozzle 23.
  • FIG. 16 shows a section through an eighth embodiment of a multi-fan jet nozzle 23 along a sectional plane corresponding to FIG.
  • the area of the multi-fan jet nozzle 23 is maximally utilized in order to have a possible large distance between adjacent fan beams. This reduces the risk of sucking in two adjacent fan beams.
  • the flow channel 38 is circular. All spray-discharge slots 30 are distributed randomly and offset from one another. This ensures that the exiting fan beams do not overlap each other in the spray room. In this arbitrary distribution of the spray-discharge slots 30, however, these are arranged in direction parallel.
  • the widths and lengths of the spray-discharge slots 30 in each case in a multi-fan jet nozzle 23 are constant.
  • the widths and lengths of the ejection slots 30 may also vary within a multi-fan jet nozzle 23.
  • the ejection slots 30 are wider at the center of a series of ejection slots 30 than at the two ends of such a row. Thereby can under cramped conditions larger flows can be displayed. The center of the total jet comes less into contact with the wall of the suction tube, which is why the drops in the center of the spray may be larger without greater risk of Saugrohrwandf ⁇ lm Struktur.
  • a multi-fan jet nozzle 23 of the present invention is by no means limited to use with a fuel injector. Rather, such a multi-fan jet nozzle 23 may be attached to any form of nozzle that requires or desires to spray liquids in fan-beam form, which fluids then disintegrate into very atomized droplets. Areas of application are e.g. Chemistry, agriculture, painting or heating technology.

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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)

Abstract

L'invention concerne une soupape d'injection de carburant caractérisée en ce qu'une buse à jets multiples en éventail (23) est placée en aval d'un élément siège de soupape (16) présentant un siège de soupape (29) fixe. Cette buse à jets multiples en éventail (23) se présente sous la forme d'un disque comprenant une zone à ajutages (28) centrale bombée s'étendant de manière elliptique. Une pluralité de fentes de pulvérisation (30), disposées par exemple sous la forme d'une rangée, est placée dans cette zone (28) de la buse à jets multiples en éventail (23) servant de dispositif de pulvérisation. Cette soupape d'injection de carburant est particulièrement appropriée pour être utilisée dans des systèmes d'injection de carburant de moteurs à combustion interne à allumage commandé et à compression du mélange.
EP05811079A 2005-01-03 2005-11-02 Buse a jets multiples en eventail et soupape d'injection de carburant pourvue d'une telle buse Expired - Fee Related EP1836387B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005000620A DE102005000620A1 (de) 2005-01-03 2005-01-03 Multi-Fächerstrahl-Düse und Brennstoffeinspritzventil mit Multi-Fächerstrahl-Düse
PCT/EP2005/055700 WO2006072487A1 (fr) 2005-01-03 2005-11-02 Buse a jets multiples en eventail et soupape d'injection de carburant pourvue d'une telle buse

Publications (2)

Publication Number Publication Date
EP1836387A1 true EP1836387A1 (fr) 2007-09-26
EP1836387B1 EP1836387B1 (fr) 2010-09-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05811079A Expired - Fee Related EP1836387B1 (fr) 2005-01-03 2005-11-02 Buse a jets multiples en eventail et soupape d'injection de carburant pourvue d'une telle buse

Country Status (6)

Country Link
US (1) US20090321541A1 (fr)
EP (1) EP1836387B1 (fr)
JP (1) JP2008527230A (fr)
CN (1) CN101094984A (fr)
DE (2) DE102005000620A1 (fr)
WO (1) WO2006072487A1 (fr)

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DE102007062190A1 (de) 2007-12-21 2009-06-25 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102007062184A1 (de) 2007-12-21 2009-06-25 Robert Bosch Gmbh Verfahren zum Umformen einer Lochscheibe, insbesondere für ein Brennstoffeinspritzventil
NL2002079C (nl) * 2008-10-10 2010-04-13 Univ Eindhoven Tech Brandstofinjector voor een verbrandingsmotor.
DE102008055083A1 (de) 2008-12-22 2010-06-24 Robert Bosch Gmbh Brennstoffeinspritzventil
US20150090225A1 (en) * 2012-05-11 2015-04-02 Toyota Jidosha Kabushiki Kaisha Fuel injection valve and fuel injection device with same
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WO2006072487A1 (fr) 2006-07-13
US20090321541A1 (en) 2009-12-31
DE102005000620A1 (de) 2006-07-13
JP2008527230A (ja) 2008-07-24
CN101094984A (zh) 2007-12-26
DE502005010248D1 (de) 2010-10-21
EP1836387B1 (fr) 2010-09-08

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