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EP2478211B1 - Module buse pour soupape d'injection, et soupape d'injection correspondante - Google Patents

Module buse pour soupape d'injection, et soupape d'injection correspondante Download PDF

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Publication number
EP2478211B1
EP2478211B1 EP10752583.4A EP10752583A EP2478211B1 EP 2478211 B1 EP2478211 B1 EP 2478211B1 EP 10752583 A EP10752583 A EP 10752583A EP 2478211 B1 EP2478211 B1 EP 2478211B1
Authority
EP
European Patent Office
Prior art keywords
nozzle body
recesses
nozzle
elevations
injection
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.)
Active
Application number
EP10752583.4A
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German (de)
English (en)
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EP2478211A1 (fr
Inventor
Milos Tichy
Junmei Shi
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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
Priority claimed from DE102009041028A external-priority patent/DE102009041028A1/de
Priority claimed from DE102009054399.6A external-priority patent/DE102009054399B4/de
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2478211A1 publication Critical patent/EP2478211A1/fr
Application granted granted Critical
Publication of EP2478211B1 publication Critical patent/EP2478211B1/fr
Active legal-status Critical Current
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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
    • 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

Definitions

  • the invention relates to a nozzle assembly for an injection valve and an injection valve with a nozzle assembly.
  • soot is highly dependent on the preparation of the air / fuel mixture in the respective cylinder of the internal combustion engine.
  • a starting point here is to achieve a very good treatment of the air / fuel mixture, and thus to reduce the pollutant emissions generated by the internal combustion engine and fuel consumption.
  • a correspondingly improved mixture preparation can be achieved if the fuel is metered under very high pressure.
  • the fuel pressures are up to over 2000 bar, when using gasoline internal combustion engines, the fuel pressures are about 200 bar.
  • Such high pressures make both high demands on the material of the nozzle assembly, on their construction and on the entire injection valve , At the same time, larger forces must be absorbed by the nozzle assembly.
  • a fuel injection valve in which the surface roughness of the valve seat in a roughness range upstream of the discharge edge of the Valve seat and downstream of the sealing seat is greater than the surface roughness of the valve seat outside the roughness range.
  • the DE 10260975 A1 discloses a fuel injection valve having a valve needle having a valve sealing surface on which are formed at least two annular grooves located upstream of the injection ports.
  • the object of the invention is to provide a nozzle assembly and an injection valve which enable reliable and precise operation.
  • the invention is characterized by a nozzle assembly for an injection valve with a nozzle body, which has a nozzle body recess with a wall and at least one injection opening.
  • the nozzle body recess can be hydraulically coupled to a high-pressure circuit of a fluid, and the at least one injection opening is hydraulically coupled to the nozzle body recess.
  • the nozzle assembly has at least one nozzle needle axially movably arranged in the nozzle body recess with a central axis and a needle tip. The needle tip cooperates with a wall of the nozzle body recess such that the nozzle needle prevents fluid flow through the at least one injection opening in a closed position and releases fluid flow through the at least one injection opening in an open position.
  • a sealing seat are formed on the wall of Düsenanalysisaus originallyung and on the Nadelkuppe a seating area. These enable the above-described interaction.
  • recesses and / or elevations formed as microstructures are arranged downstream of the sealing seat and of the seating area at least on the needle tip and / or on at least one surface area of the nozzle body recess.
  • the intensity of the turbulence of the fluid is designated, which under a predetermined pressure of the fluid with a desired distribution the shear rates in the fluid and a desired formation of the size and distribution of turbulent vortices of the fluid is correlated.
  • it is not determined by random unevennesses on the needle tip, in the wall of the nozzle body or in the wall of the at least one injection opening.
  • This arrangement has the advantage that a high intensity of the turbulence can be achieved, in particular in the at least one injection opening. Thus, a good vortex formation in the fluid can be achieved. Thus, a well-formed spray pattern with very small fluid droplets can be obtained at the injection valve. Furthermore, in this way the jet of the spray can reach a small length and a large width. In addition, a high mass flow of fluid through the nozzle assembly of the injector can be achieved.
  • the at least one surface region is part of the wall of the nozzle body and / or part of the wall of the at least one injection opening.
  • the recesses and / or elevations are annular. This has the advantage that such forms can be produced in a simple manner.
  • the recesses and / or elevations have a zigzag-shaped structure. In this way, a high intensity of the turbulence of the fluid in the at least one injection opening can be achieved. Furthermore, the recesses and surveys can be very can be easily made on the Nadelkuppe or the injector body.
  • the recesses and / or elevations are parts of a predetermined surface roughness of the needle tip and / or the wall of the nozzle body recess and / or the wall of the at least one injection opening.
  • a suitable surface roughness of the needle tip or of the injector body can already be provided in a simple manner during production.
  • a portion of the nozzle body recess is formed downstream of the sealing seat, which is hydraulically coupled to the at least one injection port.
  • the surface area of the nozzle body recess is in this case a wall of the section of the nozzle body recess. Since the speed of the fluid in the section of the nozzle body recess can be particularly high, the arrangement of the recesses and / or elevations on the wall of the section of the nozzle body recess has the advantage that the high intensity of the turbulence of the fluid can be achieved particularly easily.
  • the portion of the nozzle body recess is formed as a blind hole.
  • the nozzle body has an edge or a transition section between the section designed as a blind hole and further sections of the nozzle body recess.
  • the recesses and / or elevations are arranged in the region of the edge or of the transitional section of the nozzle body.
  • the transition section is in particular a section of the nozzle body, in which this a rounding or a zone with a continuous transition between the formed as a blind hole portion and the other portions of the nozzle body recess Has.
  • the edge or the transition section has the advantage that the high intensity of the turbulence of the fluid can be achieved particularly easily, and these turbulences can be transferred into the at least one injection opening in a particularly effective manner.
  • the nozzle body has a further edge or a further transition section between the section of the nozzle body recess and the at least one injection opening.
  • the recesses and / or elevations are arranged in the region of the further edge of the nozzle body.
  • the recesses or elevations designed as microstructures have a height or depth of at least approximately 3 ⁇ m. With such small heights or depths of the recesses or elevations, a high intensity of the turbulence of the fluid can already be achieved, in particular at the further edge or at the further transition section between the section of the nozzle body recess and the at least one injection opening.
  • the recesses or elevations designed as microstructures have a height or depth of at least approximately 18 ⁇ m. Such heights or depths of the recesses or elevations enable a high intensity of the turbulence of the fluid both in the section of the nozzle body recess and in the at least one injection opening.
  • the nozzle assembly has at least two injection openings 24.
  • the recesses and / or elevations are arranged and formed in a wall of the portion of the nozzle body recess such that a fluid vortex can be generated in each of the injection openings by means of the recesses and / or the elevations.
  • the recesses and / or elevations are designed such that the fluid can be supplied to the injection openings in such a way that vortex formation can be achieved in each of the injection openings.
  • This arrangement has the advantage that a secure vortex formation is possible in the injection openings.
  • a reduced axial velocity and, on the other hand, an additional tangential velocity component can be achieved. Due to the tangential component, a swirling flow with a lower pressure in the spin axis occurs in the injection openings. Under certain flow conditions, this pressure may reach levels at which cavitation occurs. The cavitation bubbles created during cavitation collapse on exiting the injection openings, releasing energy from the surface tension of the cavitation bubbles and causing pressure waves. The combination of the tangential flow component together with the energy of the pressure waves and the surface tension causes a very fine atomization of the fluid, an extension of the individual spray cone angle and thus a reduced axial penetration depth of the spray.
  • each of the injection openings is at least one of the recesses and / or Assigned to surveys. This has the advantage that only minor modifications to the nozzle body are required, and yet safe vortex formation can be achieved in each of the injection openings.
  • each of the injection openings are each associated with two of the recesses and / or elevations.
  • the portion of the nozzle body recess is formed as a blind hole with a blind hole wall and a blind hole bottom.
  • the injection openings are arranged in the blind hole bottom.
  • Each of the injection openings are each associated with two of the recesses and / or elevations.
  • One of these recesses and / or elevations is arranged in the blind hole bottom, and the further of these recesses and / or elevations is arranged in the blind hole wall.
  • the recesses are channel-shaped and / or the surveys rod-shaped and each extending in a longitudinal direction.
  • the longitudinal directions of the recesses and / or elevations are tangents of the injection openings. This has the advantage that a very simple production of the recesses and / or surveys is possible.
  • the recesses and / or the elevations are curved towards the injection openings. This has the advantage that a supply of fluid to the injection openings in each case from two opposite directions to the injection openings and thus a targeted formation of a predetermined direction of rotation of the fluid in the injection openings is possible. Thus, a vortex formation in the injection openings in a very stable manner possible.
  • the recesses and / or elevations on the nozzle body can be produced very simply and inexpensively by means of a sintering process.
  • the invention is characterized by an injection valve with a nozzle assembly according to the first aspect and an actuator.
  • the actuator is designed to act on the nozzle assembly.
  • FIG. 1 shows an injection valve with a nozzle assembly 10 and an actuator 11.
  • the actuator 11 interacts functionally with the nozzle assembly 10.
  • the nozzle assembly 10 has a nozzle body 12, the actuator 11 has an injector body 13.
  • the nozzle body 12 is fixedly coupled to the injector body 13 by means of a nozzle retaining nut 34.
  • the nozzle body 12 and the injector body 13 thus form a common housing of the injection valve.
  • the nozzle body 12 has a nozzle body recess 14 with a wall 16.
  • a nozzle needle 18 is arranged with a central axis Z, which forms the nozzle assembly 10 together with the nozzle body 12.
  • the nozzle needle 18 has a needle tip 20 at one end.
  • the nozzle needle 18 is guided in a region of the nozzle body recess 14. It is further biased by a nozzle spring 22 so as to prevent fluid flow through an injection port 24 disposed in the nozzle body 12 when no further forces are applied to the nozzle needle 16.
  • the injector body 13 has a recess in which an actuator 38 is arranged.
  • the actuator 38 is designed as a stroke actuator and is preferably a piezoelectric actuator comprising a stack of piezoelectric elements.
  • the piezoactuator changes its axial extent depending on an applied voltage signal.
  • the actuator can also be designed as another known to those skilled in the art for this purpose and known as suitable actuator, for example as an electromagnetic actuator.
  • the actuator 38 acts via a transformer on the nozzle needle 18, so that they can perform an axial movement.
  • the nozzle spring 22 is supported on the one hand on a pot bottom of a mechanically coupled to the actuator 38 cup-shaped body.
  • the nozzle spring 22 is on the other hand an end face of the nozzle needle 18. It is biased accordingly and thus exerts on the nozzle needle 18 a force acting in the closing direction.
  • the nozzle needle 18 Upon actuation of the actuator 38, the nozzle needle 18 is moved in the axial direction from its closed position to its open position, in which it releases the fluid flow through the injection openings 24.
  • bores 44 are introduced, which penetrate the nozzle needle 18 from its the pot bottom of the pot-shaped body side facing in a section at least along part of its axial extent. In another section, the holes 44 are directed radially outward.
  • the fluid in particular the fuel, can pass through the bores 44 and continues to flow through a gap between the nozzle needle 18 and the nozzle body 12 to the injection openings 24.
  • FIG. 2 shows an enlarged view of a section II of FIG. 1 in the area of the needle tip 20 and the nozzle body 12.
  • a sealing seat 50 which is formed cone-shaped.
  • the nozzle needle 18 has a seat region 52 in the region of the needle tip 20.
  • the seat region 52 of the needle tip 20 cooperates with the sealing seat 50 of the nozzle body 12 such that the nozzle needle 18 prevents fluid flow through the at least one injection opening 24 in a closed position and in an open position a fluid flow through the at least one injection port 24 releases.
  • a plurality of injection openings 24 are preferably formed, which can form an injection hole circle.
  • a portion 56 of the nozzle body recess 14 is formed downstream of the sealing seat 50.
  • the portion 56 of the nozzle body recess 14 is preferably formed as a blind hole.
  • the portion 56 of the nozzle body recess 14 is hydraulically coupled to the injection openings 24. In this way, it is possible that fluid can pass from the gap between the needle tip 20 and the nozzle body 12 in the portion 56 of the nozzle body recess 14 and finally on to the injection openings 24.
  • the portion 56 of the nozzle body recess 14 has a wall 58, which is a part of the wall 16 of the nozzle body recess 14.
  • injection openings 24 have walls 60.
  • the nozzle body 12 has an edge or a transition portion 62.
  • the nozzle body 12 has further edges or further transition sections 64.
  • each of the further edges or further transition sections 64 is assigned to one of the injection openings 24.
  • nozzle body recess 14 On a surface region of the nozzle body recess 14, but preferably on a plurality of recesses and / or elevations designed as microstructures according to the invention are arranged such that by means of the recesses and / or the elevations 66,68,70,72,74 a predetermined intensity of Turbulence of the fluid in the at least one injection port 24 can be generated.
  • the recesses and elevations 66 designed as microstructures are formed on the wall 58 of the section 56 of the nozzle body recess 14.
  • the recesses and elevations 66 on the wall 58 of the portion 56 preferably have a height or depth of at least approximately 18 microns. With such a height or depth of the recesses and elevations 66, a high intensity of the turbulence of the fluid can be achieved within the portion 56 of the nozzle body recess 14. This turbulence of the fluid may result in a spray pattern having advantageous spatial distribution and small fluid droplets downstream of the injection ports 24.
  • the wall 58 of the section 56 of the nozzle body recess 14 has further recesses and elevations 68, which are arranged on the edge 62 of the nozzle body 12.
  • the recesses and projections 68 preferably have a height or depth of at least about 18 microns. In this way, a high intensity of the turbulence of the fluid in the at least one injection opening 24 can be produced in the section 56 of the nozzle body recess 14.
  • a good distribution of the droplets of the fluid and a spray pattern can be achieved with an advantageous spatial distribution.
  • the wall 58 of the section 56 of the nozzle body recess 14 has further recesses and elevations 70, which are arranged on the further edge or on the further transition section 64 between the formed as a blind hole portion 56 of the nozzle body recess 14 and the injection openings 24.
  • the recesses formed as microstructures and bumps 70 preferably have a height or depth of at least about 3 ⁇ m.
  • further recesses and elevations 72 are formed on the needle tip 20.
  • the recesses and elevations 72 designed as microstructures preferably have a height or depth of at least approximately 18 ⁇ m in order thus to achieve a high intensity of turbulence in the section 56 of the nozzle body recess 14 and subsequently in the injection openings 24.
  • very small droplet sizes can be achieved at the outlet of the fluid at the injection openings 24.
  • recesses and elevations 74 are preferably arranged in the wall 60 of the injection opening 24 and formed as microstructures.
  • the recesses and projections 74 preferably have a height or depth of at least about 3 microns, so as to achieve a high intensity of turbulence of the fluid in the injection openings 24.
  • the recesses and elevations 66, 68, 70, 72, 74 preferably have a regular shape.
  • the recesses and elevations 66, 68, 70, 72, 74 are annular in a presently not claimed embodiment. This allows easy production of the recesses and elevations ( FIG. 3 ).
  • the recesses and elevations 66, 68, 70, 72, 74 are zigzag-shaped educated. This can be a particularly high intensity of
  • Turbulence of the fluid can be achieved in the injection openings 24 ( FIG. 3 ).
  • the recesses and elevations 66, 68, 70, 72, 74 have an irregular shape.
  • the recesses and elevations 66, 68, 70, 72, 74 formed as microstructures are formed in a further preferred embodiment as surface roughness.
  • cavitation in the injection openings 24 can be achieved by the recesses and elevations 70, 74 formed as microstructures. This makes possible, especially in the case of the use of the injection valve in an internal combustion engine, a high quality of combustion of the fuel. In particular, when using a plurality of injection openings 24, this can lead to an improvement of a stratified combustion operation in a cylinder of the internal combustion engine.
  • a configuration of the recesses and elevations 66, 68, 72, with a height or depth of at least approximately 18 ⁇ m, can generally lead to a very high intensity of the turbulence of the fluid in the injection openings 24 in the case of use of the injection valve in an internal combustion engine.
  • the recesses and elevations 70, 74 formed as microstructures have a height or depth of at least approximately 3 ⁇ m. Due to the generally small diameter of the injection openings 24 is also for such small ups and downs of the recesses and elevations 70, 74 a high intensity of the turbulence of the fluid in the injection ports 24 can be achieved.
  • a very high intensity of the turbulence of the fluid in the injection openings 24 and a small droplet size and a well-formed spray pattern of the fluid at the exit of the injection openings 24 can be achieved.
  • a high mass flow of the fluid and a high stability of the mass flow of the fluid can be achieved.
  • FIG. 4 shows a further example of an injection valve with a nozzle assembly 10 and an actuator 11.
  • the actuator 11 also interacts here functionally with the nozzle assembly 10.
  • the nozzle assembly 10 has a nozzle body 12, the actuator 11 has an injector body 13.
  • the nozzle body 12 is fixedly coupled to the injector body 13 by means of a nozzle retaining nut 34.
  • the nozzle body 12 and the injector body 13 form a common housing of the injection valve.
  • the nozzle body 12 has a nozzle body recess 14 with a wall 16.
  • a nozzle needle 18 is arranged with a central axis Z, which forms the nozzle assembly 10 together with the nozzle body 12.
  • the nozzle needle 18 has at one end a needle tip 20.
  • the nozzle needle 18 is guided in a region of the nozzle body recess 14 and biased by a nozzle spring 22.
  • injection openings 24 are preferably arranged near the needle tip 20. In a region surrounding the injection openings 24, the nozzle body 12 can be made consist of a sintered metal. In the nozzle body 12, a plurality of injection openings 24 are preferably formed, which can form an injection hole circle.
  • the injector body 13 has a recess in which an actuator 38 is arranged.
  • the actuator 38 is designed as a stroke actuator.
  • the actuator 38 acts on the nozzle needle 18, so that they can perform an axial movement.
  • the nozzle spring 22 exerts on the nozzle needle 18 a force acting in the closing direction, so that it prevents fluid flow through the plurality of injection openings 24 arranged in the nozzle body 12 when no further forces act on the nozzle needle 18.
  • the nozzle needle 18 Upon actuation of the actuator 38, the nozzle needle 18 is moved in the axial direction from its closed position to its open position, in which it releases the fluid flow through the injection openings 24.
  • FIG. 5 shows an enlarged view of a section V of FIG. 4 in the area of the needle tip 20 and the nozzle body 12.
  • the nozzle body 12 On the wall 16 of the nozzle body recess 14, the nozzle body 12 has a conical sealing seat 50.
  • the nozzle needle 18 has in the area of the needle tip 20 a seating area 52 which cooperates with the sealing seat 50 of the nozzle body 12 in such a way that the nozzle needle 18 flows fluid in a closed position prevents the at least one injection port 24 and in an open position, a fluid flow through the at least one injection port 24 releases.
  • a portion 56 of the nozzle body recess 14 is formed with the injection openings 24 is hydraulically coupled. In this way, the fluid from the gap between the needle tip 20 and the nozzle body 12 in the section 56 of the nozzle body recess 14 and finally reach the injection ports 24 further.
  • the portion 56 of the nozzle body recess 14 has a wall 58, which is a part of the wall 16 of the nozzle body recess 14.
  • the portion 56 of the nozzle body recess 14 is formed as a blind hole.
  • the blind hole has a blind hole wall 59 and a blind hole bottom 61.
  • the injection openings 24 are arranged in the blind hole bottom 61.
  • the nozzle body 12 has an edge 64.
  • FIG. 6 is the nozzle body 12 in the region of the portion 56 of the nozzle body recess 14 in a presently not claimed embodiment with the elevations 68 shown.
  • the nozzle body 12 has in the embodiment shown here six injection openings 24, which are arranged relative to the central axis Z at an angular distance of 60 ° to each other in the blind hole bottom 61. In further embodiments, the number of injection openings 24 may also assume a different value.
  • Each of the injection openings 24 are each associated with two elevations 68.
  • One of the protrusions 68 is in the blind hole bottom 61, and the other of the protrusions 68 is arranged in the blind hole wall 59.
  • the elevations 68 are rod-shaped.
  • the elevations 68 arranged in the blind hole wall 59 extend in each case Longitudinal directions L1.
  • the elevations 68 arranged in the blind hole bottom 61 each extend in longitudinal directions L2.
  • the longitudinal directions L1, L2 of the elevations 68 are tangents of the injection openings 24.
  • the recesses 66 are arranged in the portion 56 of the nozzle body recess 14.
  • Each of the injection openings 24 are each associated with two of the recesses 66.
  • one of the recesses 66 is arranged in the blind hole bottom 61, and another of the recesses 66 in the blind hole wall 59.
  • the recesses 66 in the blind hole wall 59 each extend in longitudinal directions L1, the recesses 66 in the blind hole bottom 61 each extend in longitudinal directions L2.
  • the longitudinal directions L1, L2 of the recesses 66 are tangents of the injection openings 24.
  • FIG. 8 is shown in a schematic representation of the vortex formation at the injection port 24.
  • a first fluid flow F1 which reaches the section 56 of the nozzle body recess 14 via the edge 64, is guided to the injection opening 24 by means of the recess 66 or elevation 68 arranged in the blind hole wall 59 and thus reaches a tangent of the injection opening 24
  • a further fluid flow F2 also passes into the section 56 of the nozzle body recess 14 via the edge 64 and is deflected tangentially to the injection opening 24 by the other recess 66 or elevation 68 in the blind hole bottom 61, not shown here.
  • a fluid vortex can be formed very rapidly at the injection opening 24, which has a high stability.
  • the fluid vortex passes through the injection opening 24 in a swirl-shaped manner. Due to the lower axial velocity of the particles of the Fluids relative to the higher tangential velocities of the fluid flows F1, F2 at the inlet to the injection openings 24 as well as in the injection openings 24 itself a fine atomization of the fluid and a large spray angle is made possible on the outside of the nozzle body 12.
  • finer atomization of the fluid and a larger spray angle at the outlet of the injection openings 24 can also be achieved in an injection valve with a plurality of injection openings 24, ie in a multi-hole nozzle , If the injection valve is used in particular in an internal combustion engine, a good distribution of the fuel in the air sucked in by the internal combustion engine and in particular stratification of the air / fuel mixture in a combustion chamber of the internal combustion engine can be achieved in this way, as well as a wetting of the surfaces in the combustion chamber small be kept or avoided.
  • the recesses 66 are arranged in the wall 58 in each case between two injection openings 24.
  • fluid flows F1, F2 can first pass over the edge 64 in the formed as a blind hole portion 56 of the Düsenanalysisaus originallyung 14 and finally be deflected tangentially to the injection openings 24 by means of the recesses 66 in an opposite sense.
  • the recesses 66 are formed in an arc from the edge 64 to the injection openings 24, so that the fluid flows F1, F2 can pass directly from the edge 64 in an opposite sense tangential to the injection openings 24.
  • the fluid flows F1, F2 from a central region of the portion 56 of the nozzle body recess 14 near the central axis Z on the
  • Recesses 66 tangentially reach the injection openings 24 in an opposite sense. This is particularly preferred if the section 56 formed as a blind hole of the nozzle body recess 14 has a large depth, so that the fluid streams F1, F2 first arrive in the center of the blind hole formed portion 56 of the nozzle body recess 14 near the central axis Z, and then to the Injection openings 24 are guided.

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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 (13)

  1. Module de buse (10) destiné à une soupape d'injection comportant
    - un corps de buse (12) qui présente un évidement de corps de buse (14) et au moins une ouverture d'injection (24), l'évidement de corps de buse (14) pouvant être couplé hydrauliquement à un circuit de haute pression d'un fluide et l'ouverture d'injection (24) est couplée hydrauliquement à l'évidement du corps de buse (14), et
    - au moins une aiguille de buse (18) disposée de manière mobile axialement dans l'évidement du corps de buse (14) avec un axe central (Z) et une calotte d'aiguille (20), un siège d'étanchéité (50) étant formé sur une paroi (16) de l'évidement du corps de buse (14) et une zone de siège (52) étant formée sur la calotte d'aiguille (20), et la zone de siège (52) interagit avec le siège d'étanchéité (50) de telle manière que l'aiguille de buse (18) empêche, dans une position fermée, l'écoulement d'un fluide à travers l'au moins une ouverture d'injection (24) et autorise, dans une position ouverte, l'écoulement d'un fluide à travers l'au moins une ouverture d'injection (24),
    caractérisé en ce que, en aval du siège d'étanchéité (50) et de la zone de siège (52) sont disposés, au moins sur la calotte d'aiguille (20) et/ou sur au moins une zone de surface (16, 60, 58) de l'évidement de corps de buse (14), en tant que microstructure, des évidements présentant une structure en zigzag et/ou des surélévations (66, 68, 70, 72, 74) de telle manière qu'au moyen des évidements et/ou des surélévations (66, 68, 70, 72, 74), une intensité prédéfinie de la turbulence du fluide peut être générée dans l'au moins une ouverture d'injection (24).
  2. Module de buse (10) selon la revendication 1, caractérisé en ce que la zone de surface est une paroi (16) du corps de buse (12) et/ou une paroi (60) de l'au moins une ouverture d'injection (24).
  3. Module de buse (10) selon l'une quelconque des revendications précédentes, les évidements et/ou les surélévations (66, 68, 70, 72, 74) présentant une forme annulaire.
  4. Module de buse (10) selon l'une quelconque des revendications précédentes, les évidements et/ou les surélévations (66, 68, 70, 72, 74) étant des parties d'une rugosité de surface prédéfinie de la calotte d'aiguille (20) et/ou de la paroi (16) de l'évidement du corps de buse (14) et/ou de la paroi (60) de l'au moins une ouverture d'injection (24).
  5. Module de buse (10) selon l'une quelconque des revendications précédentes, une section (56) de l'évidement de corps de buse (14) étant formée en aval du siège d'étanchéité (50), et cette section est couplée hydrauliquement à l'au moins une ouverture d'injection (24) et la zone de surface de l'évidement de corps de buse (14) est une paroi (58) de la section (56) de l'évidement de corps de buse (14).
  6. Module de buse (10) selon la revendication 5, la section (56) de l'évidement du corps de buse (14) étant formée comme un trou borgne et le corps de buse (12) présente, entre la section (56) formée comme un trou borgne et les autres sections de l'évidement du corps de buse (14), une arête ou une section de transition (62) et les évidements et/ou les surélévations (68) sont disposés au niveau de l'arête ou de la section de transition (62) du corps de buse (12).
  7. Module de buse (10) selon la revendication 5 ou 6, le corps de buse (12) présentant, entre la section (56) de l'évidement du corps de buse (14) et l'au moins une ouverture d'injection (24), une autre arête ou une autre section de transition (64), et les évidements et/ou les surélévations (70) sont disposés au niveau de l'autre arête ou de l'autre section de transition (64) du corps de buse (12).
  8. Module de buse (10) selon l'une quelconque des revendications précédentes, les évidements et/ou les surélévations (66, 68, 70, 72, 74) étant formés comme des microstructures présentent une hauteur ou une profondeur d'au moins environ 3 µm.
  9. Module de buse (10) selon l'une quelconque des revendications précédentes, les évidements et/ou les surélévations (66, 68, 72) étant formés comme des microstructures présentent une hauteur ou une profondeur d'au moins environ 18 µm.
  10. Module de buse (10) selon la revendication 5, comprenant au moins deux ouvertures d'injection (24), chacune des ouvertures d'injection (24) étant associée à au moins un des évidements et/ou une des surélévations (66, 68).
  11. Module de buse (10) selon la revendication 10, chacune des ouvertures d'injection (24) étant associée respectivement à deux des évidements et/ou surélévations (66, 68).
  12. Module de buse (10) selon l'une quelconque des revendications 5, 10 ou 11, la section (56) de l'évidement de corps de buse (14) étant formée comme un trou borgne avec une paroi de trou borgne (59) et un fond de trou borgne (61) et les ouvertures d'injection (24) étant disposées dans le fond de trou borgne (61) et chacune des ouvertures d'injection (24) est associée respectivement à deux des évidements et/ou surélévations (66, 68) et un de ces évidements et/ou une de ces surélévations (66, 68) est disposé(e) dans le fond de trou borgne (61) et l'autre évidement et/ou surélévation (66, 68) est disposé dans la paroi de trou borgne (59).
  13. Soupape d'injection dotée d'un module de buse (10) selon l'une quelconque des revendications précédentes avec un actionneur (11), l'actionneur (11) étant formé pour agir sur le module de buse (10).
EP10752583.4A 2009-09-14 2010-09-13 Module buse pour soupape d'injection, et soupape d'injection correspondante Active EP2478211B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009041028A DE102009041028A1 (de) 2009-09-14 2009-09-14 Düsenbaugruppe für ein Einspritzventil und Einspritzventil
DE102009054399.6A DE102009054399B4 (de) 2009-11-24 2009-11-24 Düsenbaugruppe für ein Einspritzventil und Einspritzventil
PCT/EP2010/063409 WO2011029941A1 (fr) 2009-09-14 2010-09-13 Module buse pour soupape d'injection, et soupape d'injection correspondante

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EP2478211A1 EP2478211A1 (fr) 2012-07-25
EP2478211B1 true EP2478211B1 (fr) 2014-01-08

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DE102011007876A1 (de) * 2011-04-21 2012-10-25 Robert Bosch Gmbh Komponente, insbesondere eines Kraftstoffeinspritzsystems, mit einer Oberfläche
DE102014206782A1 (de) * 2014-04-08 2015-10-08 Robert Bosch Gmbh Verfahren zur Herstellung von Einspritzöffnungen sowie Kraftstoffinjektor mit derartigen Einspritzöffnungen
CN104948368A (zh) * 2015-04-30 2015-09-30 江苏大学 一种机械扰动雾化喷油嘴
US10344725B2 (en) * 2017-06-14 2019-07-09 Continental Powertrain, USA, LLC. Fluid injector spray disc having offset channel architecture, and methods for constructing and utilizing same

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Publication number Priority date Publication date Assignee Title
US4974780A (en) * 1988-06-22 1990-12-04 Toa Nenryo Kogyo K.K. Ultrasonic fuel injection nozzle
GB9813743D0 (en) * 1998-06-26 1998-08-26 Lucas Ind Plc Fuel injector
DE10231583A1 (de) * 2002-07-11 2004-01-29 Daimlerchrysler Ag Kraftstoffeinspritzdüse einer Brennkraftmaschine mit Direkteinspritzdüse
DE10260975A1 (de) 2002-12-24 2004-07-08 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
US20040256494A1 (en) * 2003-06-03 2004-12-23 Varble Daniel L. Outwardly-opening fuel injector
DE10344584A1 (de) 2003-09-25 2005-04-28 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10353683A1 (de) * 2003-11-17 2005-06-16 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102004038897A1 (de) * 2004-08-11 2006-02-23 Robert Bosch Gmbh Brennstoffeinspritzventil
US7438241B2 (en) * 2004-11-05 2008-10-21 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US7137577B2 (en) * 2004-11-05 2006-11-21 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
DE102005029024A1 (de) * 2005-06-22 2007-01-04 Siemens Ag Düsenbaugruppe
DE102006042444A1 (de) * 2006-09-09 2008-03-27 Bayerische Motoren Werke Ag Kraftstoffeinspritzventil

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EP2478211A1 (fr) 2012-07-25
US20120223164A1 (en) 2012-09-06

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