EP1896720B1 - Hochdruckspeicherraum mit integriertem drossel- und filterelement - Google Patents

Hochdruckspeicherraum mit integriertem drossel- und filterelement Download PDF

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Publication number
EP1896720B1
EP1896720B1 EP06754990A EP06754990A EP1896720B1 EP 1896720 B1 EP1896720 B1 EP 1896720B1 EP 06754990 A EP06754990 A EP 06754990A EP 06754990 A EP06754990 A EP 06754990A EP 1896720 B1 EP1896720 B1 EP 1896720B1
Authority
EP
European Patent Office
Prior art keywords
fuel
pressure
throttle
filter element
fuel 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.)
Not-in-force
Application number
EP06754990A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1896720A1 (de
Inventor
Markus Degn
Horst Rosenkranz
Peter Thurner
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 EP1896720A1 publication Critical patent/EP1896720A1/de
Application granted granted Critical
Publication of EP1896720B1 publication Critical patent/EP1896720B1/de
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
    • 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
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector

Definitions

  • the invention relates to a Kraftstoftbinspritz adopted according to the preamble of claim 1.
  • DE 20 2004 019 820.7 refers to a fuel injector for a diesel engine.
  • the fuel injection device has a plurality of branch pipes, which serve for the fuel discharge from a high-pressure fuel accumulator of the fuel injection device.
  • a throttle is mounted, which is embodied by a support member which in turn is fixed in the region of the connection head by fixing, which are formed with the upsetting of a connection head on the branch pipe and narrow a width of the branch pipe on both sides of the support element ,
  • the throttle element is embodied in the carrier element as a through-bore with a first partial bore and a second partial bore, wherein the carrier element has a substantially cylindrical lateral surface.
  • DE 100 60 785 A1 refers to a fuel injector with a high-pressure fuel storage.
  • branch pipes are screwed, each containing a throttle for reducing pressure pulsations in the fuel injection device.
  • the throttles are each formed as a pipe piece disposed at one end of the branch pipe to which a connection head is attached or inside the branch pipe near that end.
  • Throttle elements in high-pressure accumulators are used for pressure wave attenuation within the high-pressure accumulator body.
  • cylindrical throttle pieces in connection bores of the high-pressure accumulator (common rail) which lead to the individual fuel injectors or to the high-pressure accumulator acting on the high-pressure pump, pressed.
  • the throttle elements pressed into the connection bores serve to improve the damping of pressure oscillations within the fuel injection system and thereby enable an increase in the pressure resistance of the individual components.
  • the object of the present invention is to provide a fuel injection device, in particular a high-pressure accumulator injection system, in which the bar filters integrated in the individual high-pressure feed lines to the fuel injectors can be dispensed with.
  • connection bores of the high-pressure accumulator injection-throttle elements are introduced with an integrated filter element. Due to the high pressure prevailing in the high-pressure accumulator, any particles remaining in the fuel, for example residues from the fuel tank, can be comminuted by being forced through the fine holes of the filter element designed as a sieve filter. As a result, clogging of the filter element can be avoided.
  • the filter element embodied as a screen filter with the press-fit throttle element and thereby to replace the bar filter, which according to the solution known from the prior art is currently located directly in front of the fuel injector in the high-pressure feed line.
  • the inventively proposed Einpressdrosselelement with integrated filter can be designed both as a single-stage throttle and as a two-stage throttle.
  • a through hole with a constant bore diameter or a stepped bore with a first throttle section and a second throttle section can be introduced into a throttle element carrier.
  • connection of the components can, for example by means of a cohesive joining method, such as soldering, can be achieved.
  • the carrier element in which the single-stage press-fit throttle is formed either as a through-bore or as a stepped through-bore forming two throttle sections, has a sieve filter integrated therewith
  • Filter element is pressed into the respective connection holes of the high-pressure feed lines of the fuel injectors.
  • the carrier body of the one- or two-stage formable press-fit throttle is preferably pressed into the wall of the high-pressure storage space, whereby a frictional connection between the carrier body, which is also preferably cylindrical, and the bore wall of the connection bore in the wall of the high-pressure reservoir (common rail) is achieved.
  • WFR rail Warm Forged Rail
  • LWR rail LWR rail
  • d. H. be used in a laser-welded high-pressure accumulator.
  • a centering surface for the connecting pieces in the region of the connecting bores, in which the Einpressdrossel is embedded with integrated filter element are formed.
  • the fittings which are also referred to as high-pressure fitting, can be welded to the outer circumferential surface of the high-pressure reservoir (common rail). This makes it possible to achieve a high-pressure-tight connection of the connection bore with the high-pressure line to the individual fuel injectors.
  • FIG. 1 is a cross-section of a known from the prior art high-pressure reservoir (common rail) with connector to remove.
  • a fuel injection device comprises a high-pressure storage chamber 10, which is tubular.
  • a high-pressure storage chamber 10 which is tubular.
  • the one cavity 12 of the high-pressure accumulator chamber 10 (common rail) acting on the high-pressure pump and the individual from the high-pressure accumulator 10 (common rail) apply fuel injectors not shown.
  • High-pressure lines 18 connect the fuel injectors and the high-pressure pump to the high-pressure reservoir 10.
  • the high-pressure storage space 10 comprises a wall 14, which is perpendicular to the plane according to FIG. 1 extending cavity 12 limited.
  • the outer circumferential surface of the wall 14 is identified by reference numeral 16.
  • In the wall 14 of the high pressure storage chamber 10 are individual connection bores 24, in which a throttle element 28 is integrated.
  • the throttle element 28 protrudes with its a boundary surface 30 of the cavity 12 facing side into the cavity 12 of the high-pressure accumulator chamber 10 into it.
  • connector 18 On the outer circumferential surface 16 24 fittings 18 are added in the region of the individual connection holes.
  • connector 18 includes an external thread 20, to which the fuel injector leading to the fuel injector, not shown, pressurized high-pressure fuel line 21 is attached pressure-tight.
  • the flow cross section within the connector 18 is indicated by reference numeral 22.
  • the introduced into the wall 14 of the high-pressure accumulator chamber 10 connecting bore 24 passes above the throttle element 28 in a connection cone 26, to which the high pressure line 21 is connected to the fuel injector or the high-pressure pump.
  • the flow direction of the fuel to in FIG. 1 Fuel injector, not shown, is indicated by reference numeral 32.
  • the high-pressure line 21 has a collar 23 at its end facing the high-pressure reservoir 10, which is press-fitted into the connecting cone 26 after tightening a union nut 19, whereby a pressure-tight connection of the high-pressure line 21 to the high-pressure reservoir 10 is formed.
  • FIG. 2 From the illustration according to FIG. 2 is a section according to the section line II-II in Figure 1 shows.
  • connection piece 18 provided with the external thread 20 contacts the outer circumferential surface 16 of the high-pressure storage chamber 10 at a contact surface 34.
  • the contact surface 34 is located in a recess 36 in the wall 14 of the high-pressure accumulator 10.
  • the connector 18, which is also referred to as a high-pressure fitting, at the contact surface 34 for example by means of a cohesively generated connection, for example by soldering or by welding, with the Outer shell surface 16, or the bottom of the recess 36 in the wall 14 of the high-pressure storage chamber 10 is connected.
  • the representation according to FIG. 3 is to be taken from the invention proposed Einpressdrosselelement with integrated filter element.
  • An in FIG. 3 illustrated Einpressdrosselelement 40 includes a throttle element carrier 50, which is preferably cylindrical.
  • a filter element 44 is integrated, which is preferably designed as a sieve filter.
  • the filter element 44 comprises a lateral surface 48, which contains a multiplicity of smallest screen holes 46.
  • the filter element 44 integrated into the throttle element carrier 50 protrudes into the cavity 12 of the high-pressure storage chamber 10 in an immersion depth 54. Due to the high pressure level generated by the high pressure pump in the cavity 12 of the high-pressure accumulator 10 are possibly in the high-pressure accumulator 10 promoted impurities that may be contained in the fuel, pressed through the formed in very small diameter sieve holes 46 on the lateral surface 48 of the filter element 44 and on this Way crushed.
  • the in FIG. 3 shown throttle element carrier 50 may have both a single-stage throttle, as well as in FIG. 3 shown stepped throttle.
  • the stepped throttle within the throttle element carrier 50 is characterized by a first throttle portion 58, which adjoins directly to the filter element 44 and a second throttle portion 60.
  • the first throttle section 58 has a smaller diameter than the second throttle section 60 in the throttle element carrier 50.
  • the immersion depth 54 of the filter element 44 into the cavity 12 of the high-pressure reservoir 10 is selected so that all sieve holes 46 on the lateral surface 48 of FIG Filter element 44 are acted upon by the contained in the cavity 12 of the high pressure accumulator 10, under very high pressure fuel.
  • the end face of the filter element 44 which projects into the cavity 12 of the high-pressure storage chamber 10 (common rail), is identified by reference numeral 56.
  • the arrangement of the filter element 44 which is integrated in the throttle element carrier 50 as shown in FIG. 3 causes due to the prevailing in the cavity 12 of the high-pressure accumulator 10, very high pressure levels particles are pushed through the screen holes 46 in the lateral surface 48 of the filter element 44, pass the one or two-stage Einpressdrosselelement 40 and thus clogging of the protruding into the cavity 12 Filter element 44 is effectively prevented.
  • the Einpressdrosselelement 40 it is formed in one or two stages, is received in the throttle element carrier 50, which is preferably cylindrical.
  • the connection bore 24 merges in the direction of a shoulder surface 52 on the outer circumferential surface 16 of the high-pressure reservoir 10 into the connection cone 26.
  • the trained on the outer circumferential surface 16 of the high-pressure accumulator chamber 10 approach surface 52 serves as a centering or mounting surface for the connector 18, also referred to as high-pressure fitting.
  • the connecting piece 18 and the high pressure accumulator 10 can be secured by way of a high-pressure resistant, preferably cohesively formed compound.
  • connection bore 24 Due to the non-positively introduced into the connection bore 24 throttle element support 50, the connection bore 24 is sealed against crawling of fuel between the lateral surface of the throttle element support 50 and the bore surface of the connection bore 24, so that einschmanende in the high-pressure line 21 fuel for passage of in the Einpressdrossel 40 integrated filter element 44 is forced. As a result, in turn, the entire amount of fuel entering the high-pressure line 21 is filtered.
  • the integration of a rod filter in the high-pressure line leading to the fuel injector and the arrangement of this rod filter immediately before the fuel injector is dispensable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
EP06754990A 2005-06-10 2006-05-03 Hochdruckspeicherraum mit integriertem drossel- und filterelement Not-in-force EP1896720B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005026992A DE102005026992A1 (de) 2005-06-10 2005-06-10 Hochdruckspeicherraum mit integriertem Drossel- und Filterelement
PCT/EP2006/062029 WO2006131426A1 (de) 2005-06-10 2006-05-03 Hochdruckspeicherraum mit integriertem drossel- und filterelement

Publications (2)

Publication Number Publication Date
EP1896720A1 EP1896720A1 (de) 2008-03-12
EP1896720B1 true EP1896720B1 (de) 2010-12-01

Family

ID=36589013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06754990A Not-in-force EP1896720B1 (de) 2005-06-10 2006-05-03 Hochdruckspeicherraum mit integriertem drossel- und filterelement

Country Status (5)

Country Link
EP (1) EP1896720B1 (ja)
JP (1) JP2008542625A (ja)
AT (1) ATE490402T1 (ja)
DE (2) DE102005026992A1 (ja)
WO (1) WO2006131426A1 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4737013B2 (ja) * 2006-02-20 2011-07-27 株式会社デンソー コモンレール
DE102007049357A1 (de) 2007-10-15 2009-04-16 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
DE102008044096A1 (de) * 2008-11-27 2010-06-02 Robert Bosch Gmbh Verfahren zur Herstellung von Drosselbohrungen mit niedrigem Kaviationsumschlagpunkt
DE102010064037A1 (de) 2010-12-23 2012-06-28 Robert Bosch Gmbh Verfahren zur Herstellung eines Funktionsteils und Funktionsteil
DE102012220491A1 (de) * 2012-11-09 2014-05-15 Robert Bosch Gmbh Brennstoffeinspritzventil und Brennstoffeinspritzanlage mit einem Brennstoffeinspritzventil
DE102015205980A1 (de) * 2015-04-02 2016-10-06 Robert Bosch Gmbh Brennstoffeinspritzanlage und hydraulische Anbindung an einer Brennstoffeinspritzanlage
WO2017094401A1 (ja) * 2015-11-30 2017-06-08 日立オートモティブシステムズ株式会社 インジェクタ、燃料レール及び燃料レールアッセンブリ

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111370A (en) * 1977-04-08 1978-09-05 Caterpillar Tractor Co. Fuel inlet fitting for a fuel injection nozzle
JPS60119364A (ja) * 1983-12-02 1985-06-26 Hitachi Ltd 電磁式燃料噴射弁
US5297523A (en) * 1993-02-26 1994-03-29 Caterpillar Inc. Tuned actuating fluid inlet manifold for a hydraulically-actuated fuel injection system
DE69417846T2 (de) * 1993-05-06 1999-08-12 Cummins Engine Co Inc Kompakte kraftstoffanlage hoher leistung mit speicher
JP3503784B2 (ja) * 1995-10-13 2004-03-08 株式会社デンソー 蓄圧式燃料噴射装置
DE19739810C1 (de) * 1997-09-10 1998-12-03 Siemens Ag Einspritzsystem für eine Brennkraftmaschine
GB2358898B (en) * 1999-12-09 2002-04-24 Usui Kokusai Sangyo Kk Diesel engine fuel injection pipe
JP3806302B2 (ja) * 2000-01-25 2006-08-09 臼井国際産業株式会社 コモンレール
JP2003139008A (ja) * 2001-10-31 2003-05-14 Bosch Automotive Systems Corp 蓄圧式燃料供給装置
DE10224836A1 (de) * 2002-06-05 2004-01-08 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
JP2004225671A (ja) * 2003-01-27 2004-08-12 Aisin Seiki Co Ltd 燃料供給装置

Also Published As

Publication number Publication date
ATE490402T1 (de) 2010-12-15
EP1896720A1 (de) 2008-03-12
DE502006008445D1 (de) 2011-01-13
JP2008542625A (ja) 2008-11-27
DE102005026992A1 (de) 2006-12-14
WO2006131426A1 (de) 2006-12-14

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