EP1819924A2 - Dispositif pour amortir des ondes de pression de liquide dans un moyen conduisant et/ou stockant du liquide - Google Patents

Dispositif pour amortir des ondes de pression de liquide dans un moyen conduisant et/ou stockant du liquide

Info

Publication number
EP1819924A2
EP1819924A2 EP05819146A EP05819146A EP1819924A2 EP 1819924 A2 EP1819924 A2 EP 1819924A2 EP 05819146 A EP05819146 A EP 05819146A EP 05819146 A EP05819146 A EP 05819146A EP 1819924 A2 EP1819924 A2 EP 1819924A2
Authority
EP
European Patent Office
Prior art keywords
liquid
storing means
pressure waves
reflection
leading
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Withdrawn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
EP05819146A
Other languages
German (de)
English (en)
Inventor
Uwe Iben
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
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 EP1819924A2 publication Critical patent/EP1819924A2/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Withdrawn legal-status Critical Current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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets

Definitions

  • the invention relates to a device for damping fluid pressure waves in a fluid-carrying and / or storing means, in particular in a line or in a container of an injection system of a motor vehicle, according to the preamble of claim 1.
  • Pulsation or vibration dampers in fluids carrying and / or storing lines and containers are known from the prior art, in which pressure waves in additional elastic volumes, for example in membrane reservoirs, bladder accumulators, expansion hoses, etc., can run out, the pressure energy is converted into deformation energy of the elastic volumes.
  • an attenuation of pressure waves by a phasen ⁇ shifted superposition (interference) of the pressure waves is known, which is realized, for example in Pfeifen ⁇ resonators.
  • fluid pressure waves can be reduced by active pulsation reduction by means of the interference principle of action, for example by generating the phase-shifted wave with the aid of a servo valve.
  • Such pressure waves in vessels and conduits which typically include both longitudinal and transverse waves, create flows whose direction of flow depends on the location of the source of the pressure waves.
  • the problem arises that at the end of the injection Operation generated pressure waves or their reflections, which may occur when closing the nozzles of Injek ⁇ gates, ren to a reopening of the nozzle needle of the injector tier ⁇ Ren or cause an undesirable coupling of different injectors.
  • a generic device is known from DE 102 12 876 Al. It serves to dampen pressure oscillations in a high-pressure collecting chamber of a common-rail injection device of a self-igniting internal combustion engine and comprises vibration damping valves arranged in the high-pressure chamber to injector connection channels, which are acted upon by springs similar to non-return valves when the nozzle needle closes occurring pressure wave in the Hochdrucksammeiraum verhin-.
  • the invention is based on the idea of converting the oscillation energy present in the pressure waves into heat energy by single or multiple reflection at a reflection surface and at the same time separating the pressure waves into an area leading and / or storing the remainder of the liquid in which a dissipation takes place or the pressure waves are converted into heat.
  • the invention can be realized in any liquid-carrying and / or storing means, such as, for example, in lines or in containers, wherein corresponding reflection surfaces can be produced cost-effectively.
  • the region separated from the remainder of the liquid and / or storing substance is particularly preferably formed by a return channel, in the inlet region of which the liquid pressure can sometimes be focused by means of a curved reflection surface.
  • the return channel may terminate in an opening into the liquid and / or storing means opening throttle which communicates with a relation to the reflection surface and the Druckwellenausbreitungsrich ⁇ upstream or downstream region of the liquid leading and / or storage means in connection and transverse to Spreading direction of the pressure waves in the container or in the conduit is arranged.
  • the return channel is preferably in one Wall of the liquid-conducting and / or storing means and the curved reflection onscion formed on a projecting into the interior of the liquid and / or storage means hinein ⁇ projecting reflection body.
  • a flow is induced between the focus and the throttle point, and the part of the vibration energy left over after reflection of the pressure waves at the reflection surface is focused toward the return channel and converted into heat at the throttle point.
  • the DC component ie the constant portion of the flow naturally undergoes no reflection at the reflection surface and can continue to flow under only slight losses.
  • a flow cross-section is left between the reflection body and the opposite wall of the liquid-conducting and / or storing agent, which can thereby be widened.
  • the means guiding and / or storing the liquid has a recess in a region opposite the reflection body.
  • the reflection surface can be formed by a plurality of open-pore bodies arranged one behind the other like a labyrinth and by inner walls of their open pores for repeated reflection of the liquid pressure waves.
  • the interior spaces of the pores function as the area separated and / or stored by the remainder of the liquid.
  • the pressure waves between the labyrinthine arranged porous bodies themselves are reflected back and forth, with each part of the pressure waves penetrates into the pores of the body, there to convert the vibrational energy into heat.
  • Such an open-pored body can be made, for example, at least partially of a sintered material consist.
  • a high-pressure sampling chamber of a common-rail injection device of a self-igniting internal combustion engine is provided with a device according to the invention.
  • Fig.l is a cross-sectional view of a conduit which is provided with a device for damping fluid pressure waves according to a preferred embodiment
  • FIG. 2 shows a cross-sectional view of a line, which is provided with a device for damping fluid pressure waves according to another embodiment.
  • FIG. 1 shows a preferred embodiment of a device 1 for damping liquid pressure waves in a liquid, for example hydraulic oil or fuel-carrying line 2.
  • the line 2 is, for example, along a flow path 4 from a feed 6 to a drain 8 liquid flows through.
  • the device 1 may also be assigned to a container which, although it stores liquid, is provided only for temporary removal and tracking of liquid.
  • Such a container can be formed, for example, by a high-pressure sampling chamber of a common-rail injection device of a self-igniting internal combustion engine which is in flow connection with injectors which inject fuel into combustion chambers or into an intake tract of the internal combustion engine at defined injection times, wherein by means of a high-pressure pump Fuel is nachgeför- changed.
  • Such containers or lines 2 has in common that it comes through flow processes or by temporary removal or tracking of liquid to pressure fluctuations, which generate fluid pressure waves.
  • the fluid pressure waves propagate along the flow path 4 starting from the inlet 6 to the outlet 8.
  • at least one reflection surface 10 for reflecting at least part of the fluid pressure waves into a region 12 separated from the rest of the line 2 is provided for converting the oscillation energy of the fluid pressure waves into heat energy in the line 2.
  • the reflection surface 10 is formed, for example, at one of the wall 14 into the interior of the line 2 protruding, peg-like reflection body 16 and has such a curved Form that along the flow path 4 propagating fluid pressure waves, which have been reflected on the reflection surface 10, are focused in a focus area or focus 18. If necessary, a plurality of such reflection surfaces 10 or reflection body 16 can be connected in series one behind the other.
  • the focus 18 is located in the region 12 separated from the rest of the line, which is formed, for example, by a return channel 12 in whose inlet region 20 the pressure waves are reflected. Between the reflection body 16 and the wall 14 of the conduit 2, a flow cross-section 22 is left free. This can preferably be realized in that the line 2 has a stepped recess 24 in a region opposite the reflection body 16.
  • the return channel 12 is formed, for example, in the wall 14 of the conduit and runs parallel to the flow path 4. Furthermore, it ends in a transversely in the flow path 4 münden ⁇ the throttle point 26, which with respect to the reflection surface 10 and the Druckwel ⁇ lenausbreitungsraum preferably upstream Area of line 2 is in communication. Alternatively, the throttle body 26 may communicate with a downstream portion of the conduit 2. Last but not least, the pressure wave energy behind the throttle point can also be directed into a separate branch line, into a system line or into a container which is not connected to line 2.
  • the mode of operation of the device 1 is as follows: The part of the oscillation energy left over after reflection of the pressure waves at the reflection surface 10 is focused towards the inlet region 20 of the return channel 12 into the focus 18, so that a flow in FIG the line 2 between the focus 18 and the throttle point 26 is induced, which is directed against the flow in the conduit 2. At the restricted throttle point 26, the oscillation energy of the pressure waves remaining in the flow in the return channel 12 is converted into heat.
  • the DC component i. on the other hand, the constant portion of the flow in the line 2 does not receive any reflection at the reflection surface 10 and can continue to flow in the recess 24 with only slight losses through the remaining flow cross section 22.
  • the parts which remain the same and function with respect to the previous example are given the same reference numerals characterized.
  • the inner walls of open pores 28 of an open-pored region 30 of the conduit 2 serve as a reflection surface 10 for repeated reflection of the fluid pressure waves within the pores 28, whose inner spaces represent the region separated from the conduit 2.
  • the open pores 28 are formed in at least one open-pored body 30, which rather protrudes transversely from the wall 14 of the conduit 2.
  • a labyrinth open-pore body 30 are arranged, wherein the open-pore body 30 at least partially made of a sintered material.
  • Arranged below in a labyrinth-like manner is a position of the bodies 30 which is offset relative to the conduit 2 in the axial direction and which additionally additionally overlaps in the radial direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

L'invention concerne un dispositif (1) servant à amortir des ondes de pression de liquide dans des conduites (2) et dans des contenants conduisant et/ou stockant des liquides, notamment dans des conduites et des contenants de systèmes d'injection de véhicules automobiles. Selon l'invention, pour convertir l'énergie vibratoire en énergie thermique, on place dans le contenant ou dans la conduite (2) au moins une surface de réflexion (10) qui réfléchit au moins une partie des ondes de pression de liquide dans une zone (12 ; 28) séparée du reste du contenant ou de la conduite (2).
EP05819146A 2004-11-23 2005-11-18 Dispositif pour amortir des ondes de pression de liquide dans un moyen conduisant et/ou stockant du liquide Withdrawn EP1819924A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004056414A DE102004056414A1 (de) 2004-11-23 2004-11-23 Einrichtung zur Dämpfung von Flüssigkeitsdruckwellen in einem Flüssigkeit führenden und/oder speichernden Mittel
PCT/EP2005/056046 WO2006056552A2 (fr) 2004-11-23 2005-11-18 Dispositif pour amortir des ondes de pression de liquide dans un moyen conduisant et/ou stockant du liquide

Publications (1)

Publication Number Publication Date
EP1819924A2 true EP1819924A2 (fr) 2007-08-22

Family

ID=35852012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05819146A Withdrawn EP1819924A2 (fr) 2004-11-23 2005-11-18 Dispositif pour amortir des ondes de pression de liquide dans un moyen conduisant et/ou stockant du liquide

Country Status (5)

Country Link
US (1) US20080127941A1 (fr)
EP (1) EP1819924A2 (fr)
JP (1) JP2008520892A (fr)
DE (1) DE102004056414A1 (fr)
WO (1) WO2006056552A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008013406A1 (de) * 2008-03-10 2009-09-17 Robert Bosch Gmbh Abgasnachbehandlungsvorrichtung mit verbesserter Druckpulsdämpfung
US8251047B2 (en) 2010-08-27 2012-08-28 Robert Bosch Gmbh Fuel rail for attenuating radiated noise
FR3044049B1 (fr) * 2015-11-25 2021-10-15 Renault Sas Dispositif amortisseur de pulsations d'alimentation en liquide d'un organe de vehicule
EP3470659B1 (fr) * 2017-10-13 2020-09-09 Vitesco Technologies GmbH Dispositif anti-retour pour soupape d'injection de carburant et soupape d'injection de carburant
BE1026685B1 (nl) 2018-10-05 2020-05-07 Biobest Group N V Mijtensamenstelling en werkwijze voor het kweken van mijten

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US5373824A (en) * 1993-08-06 1994-12-20 Ford Motor Company Acoustical damping device for gaseous fueled automotive engines
US5752486A (en) * 1995-12-19 1998-05-19 Nippon Soken Inc. Accumulator fuel injection device
JP3763698B2 (ja) * 1998-10-22 2006-04-05 株式会社日本自動車部品総合研究所 圧力脈動を緩和し得る燃料供給システムの設計方法
FR2786225B1 (fr) * 1998-11-24 2000-12-22 Inst Francais Du Petrole Systeme d'injection de carburant sous haute pression dans un moteur a combustion interne a injection directe
DE10006894A1 (de) * 1999-02-18 2000-08-24 Usui Kokusai Sangyo Kk Kraftstoffzufuhrleitungsanordnung
DE19942855A1 (de) * 1999-09-08 2001-03-22 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
US20020043249A1 (en) * 2000-10-16 2002-04-18 Ki-Ho Lee Fuel rail with intergal dampening features
US6901913B1 (en) * 2001-07-16 2005-06-07 Usui Kokusai Sangyo Kaisha Ltd. Fuel pressure pulsation suppressing system
US6446613B1 (en) * 2001-12-20 2002-09-10 Stanadyne Corporation Two-stage pressure limiting valve
US6615801B1 (en) * 2002-05-02 2003-09-09 Millennium Industries Corp. Fuel rail pulse damper
JP2004028076A (ja) * 2002-05-08 2004-01-29 Usui Kokusai Sangyo Kaisha Ltd フユーエルデリバリパイプ
US6742504B2 (en) * 2002-06-21 2004-06-01 International Engine Intellectual Property Company, Llc Pressure wave attenuator for a rail
DE10247775B4 (de) * 2002-10-14 2005-12-29 Siemens Ag Speichereinspritzsystem zur Dämpfung von Druckwellen, insbesondere bei einem Common Rail Einspritzsystem
US20060108014A1 (en) * 2004-11-23 2006-05-25 Marsh Andrew D Automotive power steering systems
US7093584B1 (en) * 2005-08-19 2006-08-22 Delphi Technologies, Inc. Fuel injector noise mufflers
JP4616817B2 (ja) * 2006-11-10 2011-01-19 三菱重工業株式会社 エンジンの蓄圧式燃料噴射装置

Non-Patent Citations (1)

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Title
See references of WO2006056552A2 *

Also Published As

Publication number Publication date
JP2008520892A (ja) 2008-06-19
DE102004056414A1 (de) 2006-05-24
WO2006056552A3 (fr) 2006-10-19
WO2006056552A2 (fr) 2006-06-01
US20080127941A1 (en) 2008-06-05

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