EP2466116B1 - Pulsationsdämpfer - Google Patents

Pulsationsdämpfer Download PDF

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Publication number
EP2466116B1
EP2466116B1 EP11009813.4A EP11009813A EP2466116B1 EP 2466116 B1 EP2466116 B1 EP 2466116B1 EP 11009813 A EP11009813 A EP 11009813A EP 2466116 B1 EP2466116 B1 EP 2466116B1
Authority
EP
European Patent Office
Prior art keywords
damping
attenuators
aforementioned
injector
fuel
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
EP11009813.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2466116A2 (de
EP2466116A3 (de
Inventor
Stephan Wanner
Arthur Handtmann
Sebastian Franz
Stefan Schneider
Franz Prof. Dr. Dr. h.c. Durst
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.)
KW Technologie GmbH and Co KG
Original Assignee
KW Technologie GmbH and Co KG
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 KW Technologie GmbH and Co KG filed Critical KW Technologie GmbH and Co KG
Publication of EP2466116A2 publication Critical patent/EP2466116A2/de
Publication of EP2466116A3 publication Critical patent/EP2466116A3/de
Application granted granted Critical
Publication of EP2466116B1 publication Critical patent/EP2466116B1/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
    • 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
    • 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
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/27—Fuel-injection apparatus with filters
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations

Definitions

  • Such devices are used, for example, in internal combustion engines in which clocked under high pressure fuel and metered into the combustion chamber of individual cylinders is injected. Particularly in this application, very short switching times of the injectors and an accurate volume metering of the fuel are advantageous.
  • Object of the present invention is therefore to provide a device according to the preamble of claim 1 with an improved damping.
  • At least one spacer element is provided for defining the distance and / or the volume of the intermediate space between the two damping elements.
  • the size of the gap or the distance can be set exactly or fixed in particular force-locking. This is advantageous for e.g. to promote or generate the formation of standing waves and / or reflections in the gap.
  • a structural unit or damping unit can be provided with at least two damping elements, wherein between the damping elements, the spacer element is arranged and / or wherein a common sleeve or the like determines the distance between the damping elements or defined.
  • At least two mutually spaced damping elements can be provided, between which a gap is arranged.
  • standing waves and / or reflections and / or calmer flow conditions may advantageously form in this intermediate space.
  • the combination of the aforementioned variants is e.g. formed by curved perforated sheets, metal mesh or the like, for example, the circumference or centrally touch, but on each other surfaces (slightly) spaced and herein include a gap or cavity.
  • At least one of the damping elements comprises a pore-forming material, in particular a sintered material, foam material, fiber material such as fleece or fabric, a bed of loose and / or at least partially fixed or glued to each other, welded individual bodies, or the like.
  • a chamber can be filled with bulk material, whereby a damping element can be realized in a simple manner.
  • bulk material is for example a fiber material or the like in question.
  • a single type of material or a mixture of different materials can be used.
  • Different particle sizes can also be used depending on the application in a mixture of bulk material.
  • the construction volume of the device or damping unit or injector according to the invention is to be realized as small as possible. According to the invention comparatively small dampers can be realized with quite good damping, too to be accommodated in modern vehicles with limited space.
  • a cross-sectional diameter of the cross-sectional area and / or the pore diameter of the pores is substantially 10 micrometers and the length of the damping element aligned in the flow direction of the fuel fluid is substantially 2 millimeters.
  • a cross-sectional diameter of the cross-sectional area and / or a pore diameter of the pores is substantially 100 micrometers and the length of the damping element aligned in the flow direction of the fuel fluid is substantially 50 millimeters.
  • one or more damping elements can be arranged in an unbranched region of the fuel line behind the pressure generator.
  • This arrangement has the advantage that, with the same damping elements, the pressure pulsations caused by all the injectors can be damped according to the invention.
  • the fuel line in this area is generally more accessible and usually has a larger cross section in this area. Accordingly, one or more damping elements can be accommodated more easily in this area of the fuel line.
  • the damping unit can also be formed so that between two or more branch lines in the main line one or more damping elements are arranged so that it is ensured that between two or more injectors each one Damping element is arranged and a direct pulse transmission between injectors is suppressed without damping element.
  • a damping unit with a plurality of damping elements is preferably formed so that a flow zone results between the individual damping elements, in which the partial flows are at least partially reunited.
  • a fuel filter is additionally provided in the flow direction in front of at least one damping element.
  • the fuel filter is mounted in front of the first flow-through damping element in order to retain or remove disturbing particles or contaminants before they pass into a damping element.
  • the risk of clogging a damping element is reduced or completely avoided.
  • such a fuel filter can also already be arranged upstream of the pressure generator in the flow direction.
  • each branch line 3 4, 5, 6, a damping element 7, 8 is used, which is flowed through by the fuel stream. Due to the advantageous, in particular (different) stacked construction of the damping elements, the o. A. Energy dissipation and thus also the particularly advantageous pulsation damping allows.
  • branch off branch lines 3, 4, 5, 6, which serve to supply fuel fluid to the individual injectors or cylinders of an internal combustion engine.
  • the damping elements 7, 8, 9, 10 in these branch lines 3, 4, 5, 6 are in turn stacked according to the invention and in particular stacked to cause the energy dissipation, which acts to damp pulsations.
  • a damping unit according to FIG. 2 For example, instead of the damping elements in FIG. 1 be used.
  • the combination of two damping elements 23, 24 with the intermediate space 25 has already shown an improved damping effect compared to the pure accumulation of the damping effect of the individual damping elements 23, 24.
  • the execution according to FIG. 2 can be further expanded to the effect that further damping elements and other spaces are combined in one unit.
  • a bundle of solid tubes or wire 98 or the like (US Pat. FIG. 9 d) be used.
  • holes 28 can be etched in plates 27 to produce perforated plates, which then stacked on each other in an advantageous manner, possibly again give a capillary bundle.
  • long channels / lines can be etched along the surface of a plate. If you place two of these plates with the etched side together, you will also get capillaries. So are also different combinations of manufacturing processes mutually conceivable for the production of capillaries.
  • capillaries can be generated by nanotubes and microstructures.
  • FIG. 10 something illustrated.
  • FIG. 10a shows a Durckverlauf without damping elements and FIG. 10b with damping.
  • FIG. 10a The fast closing of the injector after the injection process generates pressure pulsations ( FIG. 10a ). These are transmitted by the fluid in the rail or pipe. If several injectors are connected to the same line or rail, they also experience the pressure pulsations from the closing injector. The generated pressure pulsations behave similarly to a sinusoidal oscillation. Depending on the time interval, a wide variety of pressures are thus present in front of the injector injector, which results in an exact, reproducible minimum quantity injection makes it impossible to reduce pollutant emissions ( FIG. 11 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Prostheses (AREA)
EP11009813.4A 2010-12-15 2011-12-14 Pulsationsdämpfer Not-in-force EP2466116B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010054675 2010-12-15
DE102010054674 2010-12-15
DE102011116274 2011-10-19

Publications (3)

Publication Number Publication Date
EP2466116A2 EP2466116A2 (de) 2012-06-20
EP2466116A3 EP2466116A3 (de) 2013-05-29
EP2466116B1 true EP2466116B1 (de) 2014-07-30

Family

ID=45421766

Family Applications (3)

Application Number Title Priority Date Filing Date
EP20110009812 Not-in-force EP2466113B1 (de) 2010-12-15 2011-12-14 Pulsationsdämpfer
EP11009813.4A Not-in-force EP2466116B1 (de) 2010-12-15 2011-12-14 Pulsationsdämpfer
EP20110009811 Not-in-force EP2466112B1 (de) 2010-12-15 2011-12-14 Pulsationsdämpfer

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20110009812 Not-in-force EP2466113B1 (de) 2010-12-15 2011-12-14 Pulsationsdämpfer

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20110009811 Not-in-force EP2466112B1 (de) 2010-12-15 2011-12-14 Pulsationsdämpfer

Country Status (4)

Country Link
EP (3) EP2466113B1 (es)
DE (3) DE102011120944A1 (es)
ES (3) ES2531313T3 (es)
HU (1) HUE024519T2 (es)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2468118A1 (en) 2010-12-24 2012-06-27 Philip Morris Products S.A. An aerosol generating system with means for disabling a consumable
DE102012220661A1 (de) * 2012-11-13 2014-05-15 Robert Bosch Gmbh Brennstoffverteiler, insbesondere Brennstoffverteilerleiste für gemischverdichtende, fremdgezündete Brennkraftmaschinen
DE102013003104A1 (de) * 2013-02-25 2014-08-28 L'orange Gmbh Krafftstoffinjektor
US9644589B2 (en) * 2013-11-20 2017-05-09 Stanadyne Llc Debris diverter shield for fuel injector
DE102015220550A1 (de) * 2015-10-21 2017-04-27 Ford Global Technologies, Llc Kraftstoffeinspritzdüse
DE102016209423A1 (de) * 2016-05-31 2017-11-30 Robert Bosch Gmbh Hochdruckspeicher und Verfahren zur Herstellung eines Hochdruckspeichers
EP3502461A1 (en) * 2017-12-20 2019-06-26 Continental Automotive GmbH A fuel delivery passage for a fuel injection system and a method of manufacturing a fuel delivery passage
EP3670895B1 (en) * 2018-12-20 2023-10-18 Vitesco Technologies GmbH Fuel rail assembly for a fuel injection system for an internal combustion engine
DE102019103041B4 (de) * 2019-02-07 2022-12-29 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Sammeldruckleitung für ein Kraftstoffeinspritzsystem einer Verbrennungskraftmaschine
EP3805547A1 (en) * 2019-10-08 2021-04-14 Vitesco Technologies GmbH Fuel injection assembly and method of manufacturing a fuel rail assembly

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356091A (en) 1980-10-06 1982-10-26 Caterpillar Tractor Co. Filtering and dampening apparatus
DE19516358C1 (de) 1995-05-04 1996-08-22 Daimler Benz Ag Pulsationsdämpfer für Kraftstoff im Kraftstoffversorgungssystem einer Brennkraftmaschine
DE10226004A1 (de) * 2002-06-12 2004-01-08 Robert Bosch Gmbh Kraftstoffeinspritzsystem mit einem Festkörperdämpfungselement
DE10247775B4 (de) 2002-10-14 2005-12-29 Siemens Ag Speichereinspritzsystem zur Dämpfung von Druckwellen, insbesondere bei einem Common Rail Einspritzsystem
US7093584B1 (en) * 2005-08-19 2006-08-22 Delphi Technologies, Inc. Fuel injector noise mufflers
DE102006054178A1 (de) * 2006-11-16 2008-05-21 Robert Bosch Gmbh Kraftstoffeinspritzsystem für eine Brennkraftmaschine mit druckschwingungsgedämpfter Kraftstoffrücklaufleitung
US7942132B2 (en) * 2008-07-17 2011-05-17 Robert Bosch Gmbh In-line noise filtering device for fuel system

Also Published As

Publication number Publication date
HUE024519T2 (en) 2016-01-28
ES2525294T3 (es) 2014-12-19
DE102011120924A1 (de) 2012-06-21
ES2531313T3 (es) 2015-03-12
EP2466113B1 (de) 2014-12-17
DE102011120944A1 (de) 2012-06-21
EP2466112A2 (de) 2012-06-20
DE102011120945A1 (de) 2012-06-21
EP2466113A3 (de) 2013-05-29
EP2466112A3 (de) 2013-05-29
ES2509942T3 (es) 2014-10-20
EP2466113A2 (de) 2012-06-20
EP2466116A2 (de) 2012-06-20
EP2466112B1 (de) 2014-09-03
EP2466116A3 (de) 2013-05-29

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