EP2029887B1 - Dispositif de pulvérisation pour fluides - Google Patents

Dispositif de pulvérisation pour fluides Download PDF

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Publication number
EP2029887B1
EP2029887B1 EP07727969A EP07727969A EP2029887B1 EP 2029887 B1 EP2029887 B1 EP 2029887B1 EP 07727969 A EP07727969 A EP 07727969A EP 07727969 A EP07727969 A EP 07727969A EP 2029887 B1 EP2029887 B1 EP 2029887B1
Authority
EP
European Patent Office
Prior art keywords
shock
hifu
spray device
nozzle
wave
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
EP07727969A
Other languages
German (de)
English (en)
Other versions
EP2029887A1 (fr
Inventor
Klaus Habr
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2029887A1 publication Critical patent/EP2029887A1/fr
Application granted granted Critical
Publication of EP2029887B1 publication Critical patent/EP2029887B1/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
    • 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
    • F02M69/041—Injectors peculiar thereto having vibrating means for atomizing the fuel, e.g. with sonic or ultrasonic vibrations
    • 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
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means

Definitions

  • the invention relates to a spraying device for fluids.
  • a spraying device for fluids.
  • a spraying device is already known which discloses an actuator for generating shockwaves, which controls the fluid flow at the nozzle opening of a nozzle.
  • a one-piece actuator is provided in the known spray device.
  • Such an actuator is relatively expensive to produce depending on the shape of the nozzle, and the control of the fluid flow at the nozzle outlet can be influenced only to a relatively small extent.
  • the invention has the object, the known sprayer such that a more flexible control of the shock waves in the region of the nozzle outlet is made possible. At the same time a relatively simple production should be possible. This object is achieved in a spraying device or a method for operating a spraying device with the features of claims 1 and 11, respectively.
  • the generation of the shock waves preferably takes place with the aid of a piezoelectric element or a piezocomposite element which, for example, forms a wall section in the housing wall of the nozzle. At least two shockwave actuators are provided whose shockwaves intersect at the desired focusing point.
  • shock wave actuators which operate according to an electrohydraulic principle (radio discharge path) or according to an electrical / mechanical force conversion principle.
  • shock wave As an alternative to the shock wave principle, it is also possible to use piezo or piezocomposite elements or other fast actuators which operate according to the HIFU principle (High Intensity Focused Ultrasound).
  • the shock wave is replaced by a high-frequency ultrasound source.
  • the focus on the nozzle outlet can be carried out both directly and indirectly.
  • the shock wave propagation occurs directly between the shock wave actuator and the focusing point, with indirect propagation the shock wave is first reflected on at least one reflecting surface and then directed further in the direction of the focusing point.
  • the advantage of the indirect Propagation is in the greater structural design options for the arrangement of the shock wave actuator, so that, for example, very narrow-built sprayers can be realized.
  • the mass dosage per injection process is determined by the number of successive shock wave pulses.
  • Said spraying device can be used in various products.
  • all types of injection systems in particular injection systems in internal combustion engines such as diesel vehicles or gasoline vehicles, but also, for example, the injection of liquid solutions in the exhaust system of an internal combustion engine as exhaust aftertreatment (Ammoniakeindüsung).
  • Ammoniakeindüsung the injection of liquid solutions in the exhaust system of an internal combustion engine as exhaust aftertreatment
  • novel gasifier concepts in which such spraying can be used.
  • spraying device 1 is a fuel injection system for internal combustion engines.
  • the spraying device 1 comprises a nozzle 2, which is connected via a feed device 5, are introduced into the inlet bores 6, with a fluid reservoir 3.
  • the fluid in the fluid reservoir 3 is pressurized via a pressure generating unit 4 - exemplified as a pump P - which is in particular only a low pressure.
  • the nozzle housing 9 is funnel-shaped in the embodiment, at the tip of the nozzle housing is a nozzle outlet 8, which is to be opened and closed by a Venfilnadel 7 executed actuator.
  • the valve needle 7 is guided axially displaceable and mounted in the inlet device 5.
  • the Venfilnadel 7 is adjusted between its open and closed positions.
  • the adjusting movement of the valve needle 7 takes place along the valve needle longitudinal axis 12 and is generated by means of a suitable actuator.
  • shock waves are generated in the nozzle, which focus on the nozzle outlet 8 and transfer the shock wave energy at the nozzle exit to the fuel located there, whereby fine fuel droplets emerge, which emerge through the nozzle exit from the nozzle housing 9 and a Form fuel mist.
  • the shock waves are generated by shock wave actuators 10 and 11, which form part of the nozzle outlet 8 opposite wall of the nozzle housing 9.
  • the shock wave actuators 10 and 11 are, for example, piezoelectric elements which change their shape when an electrical voltage is applied, wherein the deformation process within a very short time span.
  • shock wave actuators 10 and 11 are concave shaped in the manner of a concave mirror, such that the focal point is in the nozzle outlet 8.
  • actuators which operate according to the electrohydraulic principle or according to another electrical / mechanical force conversion principle or the HIFU principle.
  • the shock waves run directly from the place of their generation, ie the shock wave actuators 10 and 11, without deflection or reflection to the focusing point at the nozzle exit 8.
  • FIG Fig. 2 An alternative embodiment is shown in FIG Fig. 2 represented where the dashed lines shown shock waves 13 and 14, which mark the maximum radiation angle range, not direct, but multiple reflection from the place of their formation on the shock wave actuator 10 to the focusing point at the nozzle exit 8 are directed.
  • the shock wave actuator 10 is not directly opposite the nozzle outlet 8, but is located in a laterally located wall in the nozzle housing 9 in a position without direct connection to the nozzle outlet. This arrangement has the advantage of a narrow construction.
  • the shock waves are deflected to reflection surfaces 15 and 16, which are inner walls of the nozzle housing delimiting the nozzle interior.
  • reflection surfaces 15 and 16 are provided, at which the shock waves 13 and 14 radiated from the shock wave actuator 10 are reflected, wherein the shock waves of the radiation beam generated by the shock wave actuator 10 same shockwave actuator strike different reflection surfaces. Due to the multiple deflection of the shock waves are basically greater constructive degrees of freedom with regard to the positioning of the shock wave actuators and overall in the structural design of the spray 1.
  • shock wave actuators whose shock waves, depending on the radiation angle, are directed both directly to the focusing point and indirectly via a simple or multiple deflection of reflection surfaces to the focusing point.
  • the shock waves are expediently generated repeatedly per injection process, in particular generated at high frequency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Nozzles (AREA)
  • Special Spraying Apparatus (AREA)

Claims (11)

  1. Dispositif de pulvérisation (1) pour fluides, comprenant une buse (2) et un organe de commande (7) pour réguler le flux de fluide à travers une sortie de buse (8), le dispositif de pulvérisation (1) comprenant plusieurs actionneurs à ondes de choc ou HIFU (10, 11) dans le fluide se trouvant dans la buse (2), et les ondes de choc ou HIFU (13, 14) produites par la pluralité d'actionneurs à ondes de choc ou HIFU (10, 11) étant focalisées sur la sortie de la buse (8).
  2. Dispositif de pulvérisation selon la revendication 1, caractérisé en ce que les actionneurs à ondes de choc ou HIFU (10, 11) sont intégrés dans le boîtier de buse (9).
  3. Dispositif de pulvérisation selon la revendication 2, caractérisé en ce que les actionneurs à ondes de choc ou HIFU (10, 11) forment une portion de paroi de forme concave du boîtier de buse (9).
  4. Dispositif de pulvérisation selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les actionneurs à ondes de choc ou HIFU (10, 11) sont réalisés sous forme d'élément piézoélectrique ou d'élément piézoélectrique composite.
  5. Dispositif de pulvérisation selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les actionneurs à ondes de choc ou HIFU (10, 11) sont réalisés sous forme d'actionneur électrohydraulique.
  6. Dispositif de pulvérisation selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les actionneurs à ondes de choc ou HIFU (10, 11) sont réalisés sous forme d'actionneur électromécanique.
  7. Dispositif de pulvérisation selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les ondes de choc ou HIFU (13, 14) produites par les actionneurs à ondes de choc ou HIFU (10, 11) sont réfléchies au niveau d'une paroi de boîtier (15, 16) de la buse (2) et sont orientées vers la sortie de la buse (8).
  8. Dispositif de pulvérisation selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il est prévu une unité de génération de pression (4) par le biais de laquelle le fluide doit être sollicité en pression.
  9. Dispositif de pulvérisation selon l'une quelconque des revendications 1 à 8, caractérisé en ce que pour le dosage du flux de fluide à travers la sortie de buse (8), plusieurs impulsions d'ondes de choc ou portions d'ondes HIFU successives sont produites.
  10. Dispositif de pulvérisation selon l'une quelconque des revendications 1 à 9, caractérisé par une réalisation sous forme de système d'injection pour carburants fluides, notamment dans des moteurs à combustion interne.
  11. Procédé pour le fonctionnement du dispositif de pulvérisation selon l'une quelconque des revendications 1 à 10, dans lequel des ondes de choc ou HIFU (13, 14) sont orientées sur le fluide en un point de focalisation défini.
EP07727969A 2006-06-06 2007-04-11 Dispositif de pulvérisation pour fluides Not-in-force EP2029887B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006026153A DE102006026153A1 (de) 2006-06-06 2006-06-06 Sprüheinrichtung für Fluide
PCT/EP2007/053501 WO2007141071A1 (fr) 2006-06-06 2007-04-11 Dispositif de pulvérisation pour fluides

Publications (2)

Publication Number Publication Date
EP2029887A1 EP2029887A1 (fr) 2009-03-04
EP2029887B1 true EP2029887B1 (fr) 2012-02-22

Family

ID=38326140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727969A Not-in-force EP2029887B1 (fr) 2006-06-06 2007-04-11 Dispositif de pulvérisation pour fluides

Country Status (6)

Country Link
US (1) US20090302131A1 (fr)
EP (1) EP2029887B1 (fr)
JP (1) JP2009540176A (fr)
AT (1) ATE546638T1 (fr)
DE (1) DE102006026153A1 (fr)
WO (1) WO2007141071A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000760A1 (de) * 2008-03-19 2009-09-24 Robert Bosch Gmbh Bauelementpaarung sowie Vorrichtung mit Bauelementpaarung
DE102008042850A1 (de) 2008-10-15 2010-04-22 Robert Bosch Gmbh Einspritzvorrichtung
DE102009055042A1 (de) 2009-12-21 2011-06-22 Robert Bosch GmbH, 70469 Einspritzventil
DE102010062388A1 (de) * 2010-12-03 2012-06-06 Robert Bosch Gmbh Elektromagnetisches Aktormodul und Einspritzventil

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2264191A2 (en) * 1972-02-01 1975-10-10 Plessey Handel Investment Ag Engine fuel injector system - fuel pressure used to close injector nozzle check valve when not vibrated
US4930700A (en) * 1986-08-27 1990-06-05 Atochem North America Ultrasonic dispersion nozzle having internal shut-off mechanism with barrier fluid separation
DE4127455A1 (de) * 1991-08-20 1993-02-25 Uwegas Gmbh Elektromagnetisch gesteuertes pumpe-duese-element mit integrierter zuendeinrichtung
US5866971A (en) * 1993-09-09 1999-02-02 Active Control Experts, Inc. Hybrid motor
US5437255A (en) * 1994-03-15 1995-08-01 Sadley; Mark L. Fuel injection sytem employing solid-state injectors for liquid fueled combustion engines
DE59604781D1 (de) * 1995-04-28 2000-04-27 Ficht Gmbh & Co Kg Kraftstoff-einspritzvorrichtung für brennkraftmaschinen
JPH10103176A (ja) * 1996-09-26 1998-04-21 Yamaha Motor Co Ltd 液体噴射装置
JP3369418B2 (ja) * 1996-11-25 2003-01-20 大日本スクリーン製造株式会社 超音波振動子、超音波洗浄ノズル、超音波洗浄装置、基板洗浄装置、基板洗浄処理システムおよび超音波洗浄ノズル製造方法
FR2762648B1 (fr) * 1997-04-25 1999-06-04 Renault Dispositif d'injection de carburant pour moteur a combustion interne
DE19918423A1 (de) * 1999-04-23 2000-10-26 Denys F Hackert Einspritzanlage für flüssige Medien
US6883729B2 (en) * 2003-06-03 2005-04-26 Archimedes Technology Group, Inc. High frequency ultrasonic nebulizer for hot liquids
JP2005058933A (ja) * 2003-08-18 2005-03-10 Ngk Insulators Ltd 液体噴射装置

Also Published As

Publication number Publication date
DE102006026153A1 (de) 2007-12-13
ATE546638T1 (de) 2012-03-15
JP2009540176A (ja) 2009-11-19
US20090302131A1 (en) 2009-12-10
EP2029887A1 (fr) 2009-03-04
WO2007141071A1 (fr) 2007-12-13

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