EP1058784A1 - Dämpferelement für ein kraftstoffversorgungssystem - Google Patents
Dämpferelement für ein kraftstoffversorgungssystemInfo
- Publication number
- EP1058784A1 EP1058784A1 EP98965588A EP98965588A EP1058784A1 EP 1058784 A1 EP1058784 A1 EP 1058784A1 EP 98965588 A EP98965588 A EP 98965588A EP 98965588 A EP98965588 A EP 98965588A EP 1058784 A1 EP1058784 A1 EP 1058784A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- damper element
- tubular body
- element according
- pressure
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 121
- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 238000013016 damping Methods 0.000 claims abstract description 15
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims 1
- 239000013013 elastic material Substances 0.000 abstract description 2
- 230000010355 oscillation Effects 0.000 abstract 1
- 230000010349 pulsation Effects 0.000 description 12
- 238000009826 distribution Methods 0.000 description 6
- 239000012528 membrane Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 241000768714 Anoides Species 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0041—Means for damping pressure pulsations
-
- 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
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel 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
- 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
- F02M61/166—Selection of particular materials
-
- 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
-
- 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
- F02M2200/90—Selection of particular materials
- F02M2200/9015—Elastomeric or plastic materials
Definitions
- the invention relates to a damper element for damping pressure vibrations in the fuel supply system of an internal combustion engine according to the preamble of the main claim.
- fuel supply lines for fuel injection systems of internal combustion engines which have a rigid and at least one elastic wall part connected to them, so that the pressure pulsations of the fuel occurring during the injection process of the fuel into the combustion chamber occur in the engine. material supply line are damped.
- This arrangement implies that the elastic wall part has considerable areas to be sealed off, which represents a safety risk for the operation of the internal combustion engine and the environment.
- the elastic wall must be made sufficiently stiff and firm so that the tightness of the system can be guaranteed, which is detrimental to the desired damping effect.
- DE-OS 43 41 368 describes a damper element for damping pressure vibrations in the fuel supply system of an internal combustion engine, which provides a damper element located in the fuel rail.
- the damper element is formed by one or more gas-filled chambers, the walls of which consist of an elastic material. These chambers are arranged in the vicinity of the injection valves in order to achieve the greatest damping effect on the pressure fluctuations emanating from the injection valves.
- spacers In order to prevent the injection valves from becoming blocked, spacers must also be provided in order to ensure that the chambers are at a predetermined distance from the valve mounting sockets at all times. 2 achievements Despite the space saver due to the fact that it is distributed in the fuel, this anoiding is expensive
- Safety device for a fuel distribution system without return which has a pressure reducing valve which is arranged separately from the fuel valve and which opens or closes depending on the need for fuel in the fuel distribution system and thereby maintains an essentially constant pressure potential for the fuel valves
- a pressure reducing valve which is arranged separately from the fuel valve and which opens or closes depending on the need for fuel in the fuel distribution system and thereby maintains an essentially constant pressure potential for the fuel valves
- the eifindungsgedorfe damper element with the characterizing features of the main claim has the advantage that it is anoided in the fuel rail itself, which in particular requires a simple structure with accompanying low production costs. Due to the arrangement according to the invention, no additional space is required in the internal combustion engine or the engine compartment and that Damping of the pressure fluctuations in the fuel system of the distribution system caused by the switching pulses of the injection valves is steamed in the immediate vicinity of the point of origin, that is to say of each injection valve, whereby a mutual influence on the amount of fuel to be injected can be avoided since the damper element is located on the inside, ie in the fuel distributor itself , no need to 3 additional seals to the outside are provided, which reduces the risk of damage and the associated danger to the environment.
- the arrangement of the damping element according to the invention is advantageous in that it is positioned close to all the existing injection valves and can effectively counteract the pulsations at their point of origin, without entailing the risk of the injection valves becoming blocked with the damper element.
- the arrangement of certain spacers is not necessary.
- the pressure regulator usually a pressure reducing valve
- a simple, elastic tubular body for example a rubber hose that is resistant to organic solvents, can be used as the damping element, which, arranged in the distributor tube, permanently dampens the pulsations on the inlet side. Due to the arrangement of the damper element in the fuel distributor itself, preferably coaxially therewith, there is no direct contact of the damping element with the surroundings, so that the risk of the fuel escaping into the surroundings is reduced.
- a further advantage of this arrangement is also that the elastic tubular body arranged in the fuel rail not only that on the system side, i.e. in the fuel chamber of the distributor, which is outer with respect to the tubular body, sustainably dampens pulsations caused by the operation of the injection valves, but can also take on damping tasks on the inlet side with respect to pressure pulsations caused by the feed pump, since according to a preferred embodiment the inflow into the distributor via the inner fuel chamber of the tubular body runs.
- the inner fuel chamber of the elastic tubular body is part of a return section which is separated from the system side, ie the outer fuel chamber of the fuel rail, by a pressure regulator. It is thus possible to use an elastic tubular body arranged in the fuel distributor both in fuel supply systems with and without a return. 4 drawings
- Fig. 1 shows a section through a fuel rail with a first
- Fig. 2 shows a section through a fuel rail with a second embodiment of the damper element according to the invention.
- a damper element 1 for damping system-side and inlet-side pressure vibrations in a fuel delivery system is proposed, in particular in a fuel distributor 2 of internal combustion engines with fuel injection by means of injection valves (not shown).
- the damper element 1 is designed, for example, in the form of an elastic tubular body.
- the fuel distributor 2 for an internal combustion engine.
- the fuel distributor 2 in which there are valve receptacles 3 for the attachment of injection valves (not shown), has an elongated shape and serves to distribute a fuel to a plurality of injection valves.
- Any distributor known in the prior art can be used as the fuel distributor, for example as explained in US Pat. No. 5,577,478 and US Pat. No. 5,056,489.
- a connector 4 for sealingly attaching an inlet to the fuel distributor 2.
- the connector 4 can be sealed off, for example by an O-ring as a seal 5, from a material resistant to the fuel used, and other known measures can be used for the sealing connection, for example terminals etc.
- the attachment of the connecting piece 4 to the tubular fuel distributor 2 can be carried out in any manner known to the person skilled in the art, for example by screwing, clamping, etc.
- the connecting piece 4 is designed on the side facing the fuel distributor 2 in such a way that the elastic tubular body 1 is sealed thereon can be attached.
- This includes, for example, a connector 15 provided in the connector 4 with elevations z. B. in the form of ribs 17 on its surface and a diameter corresponding to the elastic tubular body 1, on which this frictionally 5 can be applied. Clamps and other means for the firm and sealing connection of the tubular body 1 can also be used.
- the elastic tubular body 1 extends coaxially to a longitudinal axis 14 over the entire length of the fuel distributor 2 and is sealingly connected to a pressure regulator 6 at the end located downstream of the connector 4.
- This arrangement separates an inner fuel chamber 1 a located in the tubular body from an outer fuel chamber 2 a of the fuel distributor 2, which is also referred to as the system side and from which the fuel reaches the combustion chamber of the internal combustion engine via the injection valves.
- the connection of the elastic tubular body 1 to the pressure regulator 6 can be carried out in any known manner, for example by a connecting piece 16 with ribs 18 as described with regard to the connection piece 4 of the inlet.
- the pressure regulator 6 is divided, for example, into two housing parts 6a and 6b, which are separated from one another by a membrane 7.
- a membrane 7 Provided in the membrane 7 is a rigid piston 9 which is provided with a guide pin 8 and is biased by a spring 10 provided in the housing part 6a.
- the piston 9 connected to the membrane 7, together with the guide pin 8, is pressed by the force supplied by the spring 7 onto a bearing surface 11 arranged in the housing part 6b, in which there is an opening 11a for receiving and guiding the pin 8.
- the bearing surface 11 is sealingly connected at its edges to the housing part 6b, so that the opening 11a represents the only access to the outer fuel chamber 2a, the system side.
- a ball 12 formed from a rigid material, which is biased by a spring 13 against the pin 8 protruding from the opening 1 1a of the support surface 11.
- Means are provided for guiding the ball 12 so that it can move towards or away from the opening 11a depending on the pressure from the system or inlet side.
- the bias of the springs 10 and 13 is selected such that in the rest state by pressing the spring 10, the piston 9 is pressed onto the bearing surface 11, the supply of fuel into the outer fuel chamber 2a being prevented through the opening 11a.
- the pressure regulator 6 closes again and opens again when the system pressure falls below the system pressure.
- the pressure regulator 6 is sealingly attached to the fuel rail 2, for example by means of a seal 19.
- the fuel that has reached the outer fuel chamber 2a at a reduced pressure via the pressure regulator 6 is distributed therein and is injected into the combustion chambers of the internal combustion engine by injection valves attached to the valve receptacles 3.
- the pressure pulsations generated by the injection processes in the outer fuel chamber 2a of the distributor 2 are effectively compensated for by the elastic tubular body 1 arranged in the fuel distributor 2 and in the vicinity of the valve receptacles 3. It has proven to be advantageous that the elastic tubular body 1 extends over the entire length of the fuel distributor 2, preferably coaxially therewith, and is thus arranged in the vicinity of each injection valve due to the construction according to the invention.
- the pressure pulsations transmitted to the elastic tubular body 1 are in turn transmitted in the tubular body 1 to the fuel flowing in under pressure in the internal fuel chamber 1 a, the pulsations being intercepted in the elastic tubular body 1. Pulsations generated by the opening and closing movement of the pressure regulator 6 are also damped.
- the damping of the pressure pulsations in the outer fuel chamber 2a not only eliminates the pressure fluctuations in the outer fuel chamber 2a with the accompanying impairment of the injection quantities in the respective injection valves, but also the associated noise emissions.
- FIG. 2 A further embodiment of the invention is shown in FIG. 2, in which the pressure regulator 6 is arranged downstream of the injection valves.
- the fuel rail 2, in which the valve seats 3 are located, also has an elongated shape and is connected directly to the inlet.
- the connecting piece 4 for the supply line can already be pre-formed in one piece in the fuel distributor 2, or a special connecting piece 4, as explained with reference to FIG. 1, can be attached to it for receiving an supply line.
- the fuel goes directly into the outer fuel chamber 2a of the 7
- Fuel distributor 2 and is injected there by the injection valves attached to the valve receptacles 3 into the combustion chambers of the internal combustion engine.
- a pressure regulator 6 is arranged in the fuel distributor 2 downstream at the end opposite the connecting body 4. The construction of such pressure regulators 6 is well known to the person skilled in the art.
- the fuel located at a predetermined pressure in the outer fuel chamber 2 a passes this threshold pressure into the inner fuel chamber 1 a of the elastic pipe body 1 arranged in the fuel distributor 2 and further into a return flow section.
- the elastic tubular body 1 is preferably part of the return section and can, as explained with reference to FIG. 1, preferably be arranged coaxially in the fuel distributor 2.
- the pressure pulsations caused by the operation of the injection valves in the outer fuel chamber 2a of the distributor 2 are effectively damped due to the internal arrangement of the elastic tubular body 1 in the immediate vicinity of the valve receptacles 3.
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
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19807702A DE19807702A1 (de) | 1998-02-24 | 1998-02-24 | Dämpferelement für ein Kraftstoffversorgungssystem |
DE19807702 | 1998-02-24 | ||
PCT/DE1998/003441 WO1999043953A1 (de) | 1998-02-24 | 1998-11-23 | Dämpferelement für ein kraftstoffversorgungssystem |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1058784A1 true EP1058784A1 (de) | 2000-12-13 |
EP1058784B1 EP1058784B1 (de) | 2002-02-20 |
Family
ID=7858733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98965588A Expired - Lifetime EP1058784B1 (de) | 1998-02-24 | 1998-11-23 | Dämpferelement für ein kraftstoffversorgungssystem |
Country Status (8)
Country | Link |
---|---|
US (1) | US6431149B1 (de) |
EP (1) | EP1058784B1 (de) |
JP (1) | JP2002505401A (de) |
KR (1) | KR20010034538A (de) |
BR (1) | BR9815685A (de) |
CZ (1) | CZ291330B6 (de) |
DE (2) | DE19807702A1 (de) |
WO (1) | WO1999043953A1 (de) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7004146B1 (en) * | 1999-08-24 | 2006-02-28 | Sanshin Kogyo Kabushiki Kaisha | Fuel injection system for outboard motor |
US6148798A (en) * | 1999-10-01 | 2000-11-21 | Delphi Technologies, Inc. | Coaxial flow through fuel rail with a damper for a recirculating fuel system |
KR100440015B1 (ko) * | 2001-09-20 | 2004-07-14 | 현대자동차주식회사 | 맥동 댐퍼 기능을 가진 연료 분배관 |
KR20030092490A (ko) * | 2002-05-30 | 2003-12-06 | 현대자동차주식회사 | 연료공급 시스템 |
FR2845129B1 (fr) * | 2002-09-30 | 2006-04-28 | Delphi Tech Inc | Insert du type diode fluidique pour attenuer des ondes de pression, et rail commun equipe de tels inserts |
US7146700B1 (en) | 2003-10-22 | 2006-12-12 | Millennium Industries Angola Llc | Method of manufacturing a pressure damper for a fluid conduit |
US7021290B2 (en) * | 2003-11-25 | 2006-04-04 | Millennium Industries | Fuel rail crossover hose |
US6935314B2 (en) * | 2003-12-19 | 2005-08-30 | Millennium Industries Corp. | Fuel rail air damper |
US6901914B1 (en) * | 2004-08-27 | 2005-06-07 | Delphi Technologies, Inc. | Variable stiffness fuel rail pulse damper having extended dynamic range |
US6948479B1 (en) * | 2004-09-01 | 2005-09-27 | Delphi Technologies, Inc. | Inline pulsation damper system |
JP2006118933A (ja) * | 2004-10-20 | 2006-05-11 | Zama Japan Co Ltd | エンジンのガスセンサユニット |
JP4794871B2 (ja) * | 2005-01-24 | 2011-10-19 | 臼井国際産業株式会社 | フューエルデリバリパイプ |
US20070040065A1 (en) * | 2005-08-19 | 2007-02-22 | Von Thal German | Flexible refueling boom extendable tube |
US7921881B2 (en) * | 2006-12-15 | 2011-04-12 | Millennium Industries Corporation | Fluid conduit assembly |
JP5086858B2 (ja) * | 2008-03-26 | 2012-11-28 | 本田技研工業株式会社 | 内燃機関 |
DE102009016689A1 (de) | 2009-04-07 | 2010-10-14 | Daimler Ag | Kraftstoffeinspritzsystem |
JP6341554B2 (ja) * | 2013-12-19 | 2018-06-13 | 国立大学法人東京工業大学 | 半導体装置の製造方法 |
DE102018221198A1 (de) * | 2018-12-07 | 2020-06-10 | Robert Bosch Gmbh | Komponente, insbesondere Brennstoffleitung oder Brennstoffverteiler, und Brennstoffeinspritzanlage |
DE102020128254B4 (de) * | 2020-10-27 | 2022-08-18 | Marco Systemanalyse Und Entwicklung Gmbh | Verteilerbalken |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3432727A1 (de) | 1984-05-10 | 1985-11-14 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffversorgungsleitung |
US5056489A (en) | 1989-07-10 | 1991-10-15 | Siemens-Bendix Automotive Electronics L.P. | Fuel rail for v-type engine |
IT220614Z2 (it) * | 1990-09-28 | 1993-10-06 | Weber Srl | Collettore di alimentazione del carburante per un dispositivo di alimentazione di un motore a combustione interna in grado di esplicare un'azione di smorzamento delle vibrazioni |
DE4341368A1 (de) | 1993-12-04 | 1995-06-08 | Bosch Gmbh Robert | Dämpferelement zur Dämpfung von Druckschwingungen |
US5579739A (en) | 1994-01-14 | 1996-12-03 | Walbro Corporation | Returnless fuel system with demand fuel pressure regulator |
US5398655A (en) | 1994-01-14 | 1995-03-21 | Walbro Corporation | Manifold referenced returnless fuel system |
US5577478A (en) | 1995-11-03 | 1996-11-26 | Walbro Corporation | Integrated fuel pressure regulator and rail assembly |
US5845621A (en) * | 1997-06-19 | 1998-12-08 | Siemens Automotive Corporation | Bellows pressure pulsation damper |
US5896843A (en) * | 1997-11-24 | 1999-04-27 | Siemens Automotive Corporation | Fuel rail damper |
US6148798A (en) * | 1999-10-01 | 2000-11-21 | Delphi Technologies, Inc. | Coaxial flow through fuel rail with a damper for a recirculating fuel system |
-
1998
- 1998-02-24 DE DE19807702A patent/DE19807702A1/de not_active Withdrawn
- 1998-11-23 KR KR1020007009308A patent/KR20010034538A/ko not_active Application Discontinuation
- 1998-11-23 DE DE59803156T patent/DE59803156D1/de not_active Expired - Lifetime
- 1998-11-23 US US09/622,875 patent/US6431149B1/en not_active Expired - Fee Related
- 1998-11-23 EP EP98965588A patent/EP1058784B1/de not_active Expired - Lifetime
- 1998-11-23 CZ CZ20003079A patent/CZ291330B6/cs not_active IP Right Cessation
- 1998-11-23 JP JP2000533666A patent/JP2002505401A/ja active Pending
- 1998-11-23 BR BR9815685-3A patent/BR9815685A/pt active Search and Examination
- 1998-11-23 WO PCT/DE1998/003441 patent/WO1999043953A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9943953A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2002505401A (ja) | 2002-02-19 |
DE59803156D1 (de) | 2002-03-28 |
CZ291330B6 (cs) | 2003-02-12 |
WO1999043953A1 (de) | 1999-09-02 |
DE19807702A1 (de) | 1999-08-26 |
EP1058784B1 (de) | 2002-02-20 |
BR9815685A (pt) | 2000-10-24 |
US6431149B1 (en) | 2002-08-13 |
CZ20003079A3 (en) | 2001-05-16 |
KR20010034538A (ko) | 2001-04-25 |
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