EP2516840A1 - Soupape d'injection - Google Patents

Soupape d'injection

Info

Publication number
EP2516840A1
EP2516840A1 EP10762643A EP10762643A EP2516840A1 EP 2516840 A1 EP2516840 A1 EP 2516840A1 EP 10762643 A EP10762643 A EP 10762643A EP 10762643 A EP10762643 A EP 10762643A EP 2516840 A1 EP2516840 A1 EP 2516840A1
Authority
EP
European Patent Office
Prior art keywords
shock wave
membrane
shockwave
injection valve
valve according
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.)
Withdrawn
Application number
EP10762643A
Other languages
German (de)
English (en)
Inventor
Anton Dukart
Olaf Ohlhafer
Dirk Schmidt
Robert Giezendanner-Thoben
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 EP2516840A1 publication Critical patent/EP2516840A1/fr
Withdrawn legal-status Critical Current

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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/06—Use of pressure wave generated by fuel inertia to open injection valves
    • 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

Definitions

  • the invention relates to an injection valve, in particular an injector for
  • a spraying device for fluids is known.
  • the known spray device has a nozzle and an actuator for regulating the fluid flow through the nozzle outlet.
  • a shock wave actuator for generating shock waves is provided in the fluid in the nozzle. Via the shockwave actuator, shockwaves are generated in the spray device, which are conducted to the fluid located in the nozzle.
  • the injection valve according to the invention with the features of claim 1 has the advantage that an injection behavior is improved. Specifically, defined injection jets can be realized and it can be at least largely independent of the ambient pressure, in particular combustion chamber pressure, opening of the
  • the shockwave actuator generates shock waves which are conducted to the sealing seat.
  • the physical phenomenon of the shock wave is a strong pressure wave in elastic media, such as liquids that can propagate at supersonic speeds, with high mechanical stresses and pressures in the shock front of the shock wave.
  • the shock wave represents a pressure pulse in which within a fraction of a second the pressure rises steeply and then falls steeply again.
  • the extreme pressure change produced by the pressure wave is further enhanced by the shock wave amplification channel.
  • the valve closing body can be lifted from the valve seat surface in an advantageous manner in order to open the sealing seat formed between the valve closing body and the valve seat surface.
  • very high injection pressures can be realized to an advantageous
  • Cross-sectional area preferably evenly from the sealing seat down. This results in an advantageous reinforcement of the shock wave, which exerts a high local pressure and thus a large opening force on the valve closing body on the sealing seat.
  • an injector body which has at least one interior space, that a shockwave reinforcement element is inserted into the interior, that the shockwave reinforcement channel is at least partially configured between an inner wall of the interior space and the shockwave reinforcement element, and that a tip of the shockwave reinforcement element in the
  • shock waves is oriented.
  • the shock wave generated by the shock wave actuator runs in the direction of the sealing seat.
  • shock wave channel so that the shock wave increasingly amplified.
  • the shock wave amplification channel between the inner wall of the interior and the shock wave reinforcement element at least partially annular and / or at least partially partially annular and / or at least partially configured as a ring interrupted several times.
  • the shock wave amplifying element at least
  • Shock wave actuator tapers to the sealing seat. Furthermore, it is advantageous that the
  • Inner wall of the interior is configured at least partially conical.
  • Annular gap which is optionally divided into sections, are formed.
  • the annular gap preferably narrows further in the direction of the sealing seat, so that the shock wave is increasingly reinforced.
  • a high pressure of the shock wave which leads to the opening of the sealing seat, then acts at least approximately uniformly over the sealing seat.
  • the shock wave amplifying element is designed.
  • the shock wave amplifying element can be designed in one or more parts. In a multi-part design, the individual parts are connected to each other in a suitable manner.
  • at least one guide element is provided for the shockwave reinforcing element, which is arranged in the interior of the injector body. As a result, a guide of the guide element is ensured, for example, along a longitudinal axis of the injection valve.
  • a spring element which acts on the valve closing body against the sealing seat.
  • the opening force on the valve closing body induced by the shock wave due to the high local pressure on the sealing seat in this case acts against a bias of the spring element.
  • valve closing body has at least one pressure equalization channel. As a result, a hydraulic damping of the valve closing body is avoided during an opening movement.
  • the shock wave actuator has an electrically conductive, elastic membrane and at least one field coil and that the field coil is assigned to generate an induction current in the membrane of the membrane.
  • An induction current can be generated in the membrane via the field coil.
  • the interaction of the magnetic field of the field coil and the induced magnetic field generated by the induction current in the membrane results in a force on the membrane. This is what happens Bending of the membrane.
  • the bending of the membrane creates a shock wave in the medium adjacent to the membrane. This shockwave then passes from the diaphragm through the shockwave reinforcement channel to the sealing seat.
  • the membrane is designed as an at least approximately circular membrane and that the field coil in the region of one of the
  • Shock wave amplification channel facing away from the membrane is arranged.
  • a repulsive force is generated due to the magnetic field of the coil and the induced magnetic field in the diaphragm. This results in an induction current (eddy current) in the membrane, which is oriented opposite to the current through the field coil.
  • the membrane is designed as a tubular and / or conical membrane that an inner side of the membrane
  • the membrane is preferably designed as a metal membrane.
  • the metal membrane may be at least substantially formed of copper.
  • a membrane may also be formed of at least two components which serve to seal and to allow the excitation.
  • the membrane may be formed from at least one noble metal, in particular platinum, and copper.
  • the membrane may also be formed from a ferromagnetic steel sheet. In order to improve the conductivity of the membrane, a ferromagnetic steel sheet coated with copper or the like towards the field coil can also be used as the membrane.
  • Fig. 1 shows a first embodiment of an injection valve of the invention in a partial, schematic sectional view
  • the shock wave amplifying element 10 is designed conical.
  • Shock amplification element 10 can also be designed exponentially shaped.
  • a tip 29 of the Stoßwellenstärkungselements 10 is directed to the center of the membrane 17.
  • the shock wave amplifying element 10 is with respect to the axis 15th formed symmetrically.
  • a width 30 of the annular, remaining free cross-sectional area 23 decreases in the direction 28 as far as the sealing seat 9. Furthermore, the remaining cross-sectional area 23 also decreases between the membrane 17 and the tip 29.
  • the cross-sectional area 23 is configured circular between the membrane 17 and the tip 29.
  • the shock wave 27 runs in the direction 28 to the shock wave actuator 4
  • the conical shock wave reinforcement element 10 pierces the flat shock wave front of the shock wave 27 with its tip 29.
  • the shock wave reinforcement element 10 is designed such that only a minimal part of the shock wave 27 is reflected at the tip 29. Accordingly, the
  • a force is exerted on the valve closing body 8 in the opening direction 14 due to the high local pressure.
  • the magnitude of the force can be adjusted over the given area ratios and angles of the level of the valve closing body 8 and the area in the region of the sealing seat 9.
  • Disc spring packs and an adjustment means 37 arranged in the form of shims.
  • the spring element 36 is biased, so that the valve closing body 8 against the
  • Opening direction 14 is pressed with a bias against the valve seat surface 7.
  • the valve closing body 8 is displaced in the opening direction 14. This leads to the opening of the sealing seat 9 and thus to the escape of the medium from the inner space 5 via injection holes 38, 39.
  • an atomization of the medium in the surrounding space, in particular a combustion chamber of an internal combustion engine can be achieved by the shock wave.
  • the valve closing body 8 has a pressure compensation channel 40, so that a hydraulic damping of the valve closing body 8 during the opening movement is avoided.
  • the reinforced shock wave has left the pressure-effective areas of the valve closing body 8 at the sealing seat 9, again dominates the closing force of the spring element 36, so that the valve closing body 8 is adjusted against the opening direction 14 and by placing the valve closure member 8 on the valve seat surface 7 of the sealing seat. 9 is closed again.
  • the leaked during the injection process via the injection holes 38, 39 medium is replaced by the inlet channel 25.
  • a continuous flow of the medium to be injected can be achieved via the inlet channel 25 and the outlet channel 26, any gas bubbles formed being conveyed out of the interior 5.
  • the injection valve 1 is prepared for the next injection.
  • Combustion chamber temperature is stable.
  • the pressure of the medium in the interior 4 may be in the range between 100 kPa (1 bar) and 500 kPa (5 bar).
  • the injection valve 1 can generate defined individual injection jets. Specifically, a sufficient pressure is reliably generated, for example, a
  • shock wave generation by the shock wave amplifying element 10 a very fast, explosive discharge of the stored amount of energy is needed.
  • an amount of energy of about 20 J are delivered, which corresponds to a power of a few MW.
  • the power densities are limited due to the saturation effects of the ferromagnetism and the ferroelectric.
  • relatively large volume displacements are needed to promote and thus inject a sufficient amount of medium through the shock wave amplification channel 22.
  • the field coil 18 can also be mounted on a cylindrical or conical surface of a cylinder or cone, in order to increase the amplitude of the shock wave 27 with suitable wave concentrators.
  • the efficiency for the purely magnetic coupling is about 75%. Part of the energy is converted into heat in the metal membrane 17 and released to the medium in the region of the side 20. By heating, there is thus an expansion of the medium on the side 20 of the membrane 17, which leads to a thermal wave, so to speak, which supports the formation process of the shockwave 27.
  • shock wave actuator 4 can realize a pumping function.
  • the metal diaphragm 17 or the piston is preferably formed of a ferromagnetic steel sheet which is coated with the field coil 18 to improve the conductivity with copper or the like. After the amount determined by the pulse of the current through the field coil 18 has been injected by operating the membrane 17, the
  • the reset function can also be realized by a return spring which acts on the membrane 17.
  • shock wave amplification channel 22 the shock wave 27 is amplified.
  • the reinforced shock wave runs up to the sealing seat 9, whereby it for spraying the medium over the
  • the amplitude of the shock wave 27 with suitable
  • the inlet channel 25 may open into the interior 5 at one end 42 of the interior 5.

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

L'invention concerne une soupape d'injection (1) utilisée, en particulier, comme injecteur pour des installations d'injection de carburant ou pour des installations de post-traitement de gaz d'échappement, comprenant un ensemble d'actionneurs d'ondes de choc (4), un clapet de soupape (8) qui coopère avec une face de siège de soupape (7), au niveau d'un siège d'étanchéité (9), et un canal amplificateur d'ondes de choc (22). Le canal amplificateur d'ondes de choc (22) sert à la transmission des ondes de choc (27) produites par ledit ensemble d'actionneurs d'ondes de choc (4) au siège d'étanchéité (9), et à l'amplification desdites ondes de choc (27).
EP10762643A 2009-12-21 2010-09-30 Soupape d'injection Withdrawn EP2516840A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009055042A DE102009055042A1 (de) 2009-12-21 2009-12-21 Einspritzventil
PCT/EP2010/064584 WO2011076452A1 (fr) 2009-12-21 2010-09-30 Soupape d'injection

Publications (1)

Publication Number Publication Date
EP2516840A1 true EP2516840A1 (fr) 2012-10-31

Family

ID=43028979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10762643A Withdrawn EP2516840A1 (fr) 2009-12-21 2010-09-30 Soupape d'injection

Country Status (5)

Country Link
US (1) US20120256013A1 (fr)
EP (1) EP2516840A1 (fr)
CN (1) CN102713246A (fr)
DE (1) DE102009055042A1 (fr)
WO (1) WO2011076452A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010062388A1 (de) * 2010-12-03 2012-06-06 Robert Bosch Gmbh Elektromagnetisches Aktormodul und Einspritzventil
WO2013050078A1 (fr) * 2011-10-06 2013-04-11 Robert Bosch Gmbh Injecteur
DE102014221635A1 (de) 2014-10-24 2016-04-28 Robert Bosch Gmbh Dosiermodul zum Einbringen eines Betriebsstoffes in eine Leitung
CA2890401C (fr) * 2015-01-21 2015-11-03 Vln Advanced Technologies Inc. Appareil de decharge electrique pour generer de puissants jets d'eau cavitants et impulsionnels a basse frequence
CA2921675C (fr) 2016-02-24 2017-12-05 Vln Advanced Technologies Inc. Mecanisme d'electrodecharge destine a neutraliser les mines antipersonnelles
JP6814964B2 (ja) * 2017-02-07 2021-01-20 パナソニックＩｐマネジメント株式会社 口腔洗浄装置およびそのノズル

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6114468A (ja) * 1984-06-29 1986-01-22 Mitsubishi Motors Corp 燃料噴射装置
DE4106015A1 (de) * 1991-02-26 1992-08-27 Ficht Gmbh Druckstoss-kraftstoffeinspritzung fuer verbrennungsmotoren
US5437255A (en) * 1994-03-15 1995-08-01 Sadley; Mark L. Fuel injection sytem employing solid-state injectors for liquid fueled combustion engines
CN1187865A (zh) * 1995-04-28 1998-07-15 费希特股份有限公司 内燃机的燃油喷射装置
EP0826872A3 (fr) * 1996-08-26 1999-11-24 Yamaha Hatsudoki Kabushiki Kaisha Dispositif d'injection de liquide
JPH10213041A (ja) * 1997-01-31 1998-08-11 Yamaha Motor Co Ltd 内燃機関用液体噴射装置
DE69805661D1 (de) * 1998-07-09 2002-07-04 Mdi Motor Dev Internat S A Soc Verfahren zum betrieb einer expansionskamer einer brennkraftmaschine sowie expansionskammer
DE10015109A1 (de) * 2000-03-28 2001-10-04 Peter Walzel Verfahren und Vorrichtungen zur Herstellung gleich großer Tropfen
DE102006026153A1 (de) 2006-06-06 2007-12-13 Robert Bosch Gmbh Sprüheinrichtung für Fluide
US7937945B2 (en) * 2006-10-27 2011-05-10 Kinde Sr Ronald August Combining a series of more efficient engines into a unit, or modular units

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011076452A1 *

Also Published As

Publication number Publication date
WO2011076452A1 (fr) 2011-06-30
CN102713246A (zh) 2012-10-03
DE102009055042A1 (de) 2011-06-22
US20120256013A1 (en) 2012-10-11

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