EP1058784B1 - Dämpferelement für ein kraftstoffversorgungssystem - Google Patents
Dämpferelement für ein kraftstoffversorgungssystem Download PDFInfo
- Publication number
- EP1058784B1 EP1058784B1 EP98965588A EP98965588A EP1058784B1 EP 1058784 B1 EP1058784 B1 EP 1058784B1 EP 98965588 A EP98965588 A EP 98965588A EP 98965588 A EP98965588 A EP 98965588A EP 1058784 B1 EP1058784 B1 EP 1058784B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- pressure
- supply system
- fuel supply
- tubular body
- 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.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims description 107
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 238000013016 damping Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims 1
- 239000002759 woven fabric Substances 0.000 claims 1
- 230000010349 pulsation Effects 0.000 description 11
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 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
- 239000013013 elastic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
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
- 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
- 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
- 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 is based on one Fuel supply system of an internal combustion engine according to the genus of Main claim.
- the fuel rail has thereby a tubular base body, in the interior of which another tubular body is introduced.
- the Fuel rail also contains a pressure regulator Maintaining a constant pressure in the Fuel supply line of the tubular base body.
- the inner tubular body is made of an elastic deformable material so that it has a volume and / or shape change of the fuel supply line, when the pressure in it suddenly changes.
- the pressure regulator is arranged on the fuel rail such that it is downstream of the fuel supply line. insofar which in turn provides downstream of the pressure regulator arranged inner tubular body represents a return.
- the fuel supply system is so in the way operated that via a fuel connection under pressure Fuel of the fuel supply line in the outer tubular base body is supplied from where it can already reach the injectors. If the pressure in the fuel supply line a predetermined value exceeds, it acts on the pressure regulator in the Shut-off element opens, causing fuel in the as Return serving inner tubular body passes.
- the inner tubular body is basically only from Fuel flows through when the pressure regulator is open. Such a design is therefore not suitable for return-free fuel supply systems.
- a damper element for damping pressure vibrations described in the fuel supply system of an internal combustion engine provides a damper element located in the fuel rail.
- the damper element is formed by one or more gas-filled chambers, the walls of one elastic material exist. These chambers are placed near the injectors, to have the greatest damping effect on that of the injectors to achieve outgoing pressure fluctuations. To clog the injectors too To prevent this, additional spacers must be provided at all times to ensure a predetermined spacing of the chambers from the valve support neck. Despite the space saving due to the placement in the fuel rail however, this arrangement is expensive.
- Pressure regulators are usually required to operate fuel distribution systems use a higher inlet pressure on a lower one, in the fuel rail reduce the prevailing system pressure.
- the construction of such pressure reducers is general known. Pressure reducers, especially in the case of return-free fuel supply systems, arranged upstream and outside the fuel rail.
- the Control diaphragm is arranged on the system pressure side and simultaneously takes over one Damping function.
- U.S. Patent No. 5,398,655 discloses a fuel control device for a fuel rail system without recirculation that is separate from the Fuel rail has arranged pressure reducing valve, which is dependent opens or closes from the need for fuel in the fuel rail system and maintains a substantially constant pressure potential for the injection valves.
- this system poses a security risk due to the additional facilities because there is additional leakage in the event of damage such as occurs in accidents may occur.
- the fuel supply system according to the invention with the characterizing features of the main claim has the advantage that a damper element itself in the fuel rail is arranged, which is in particular a simple structure with accompanying low Production costs conditional. Because of the arrangement according to the invention, none Additional space in the internal combustion engine or the engine compartment is required and the damping the pressure vibrations caused by the switching pulses of the injection valves in Fuel supply of the distribution system is in the immediate vicinity of the place of origin, i.e. of each injector damped, with a mutual influence of the injected Amount of fuel can be avoided. Because the damper element internal, i.e. is arranged in the fuel rail itself, no additional Seals to the outside are provided, reducing the risk of damage and reduces the associated danger to the environment.
- the pressure regulator usually a pressure reducing valve, with the fuel rail integrated training.
- a simple, elastic tubular body for example a resistant to organic solvents Rubber hose can be used, which arranged in the manifold the pulsations dampens sustainably on the inlet side.
- Another advantage of this arrangement is that it is in the fuel rail arranged elastic tubular body not only that on the system side, i.e. by doing with respect to the tubular body outer fuel chamber of the distributor, by the operation of the Injection valves sustainably dampens pulsations, but also on the inlet side Damping tasks relating to pressure pulsations caused by the feed pump can take over because the inflow into the distributor runs over the inner fuel chamber of the tubular body.
- damper element 1 for damping system-side and inlet-side pressure vibrations proposed in a fuel delivery system, especially in a Fuel distributor 2 of internal combustion engines with fuel injection by means of injection valves (Not shown).
- the damper element 1 is, for example, in the form of a elastic tubular body.
- the Fuel distributor 2 for an internal combustion engine.
- the Fuel distributor 2 in which there are valve seats 3 for the attachment of injectors (not shown), has an elongated shape and serves to distribute a Fuel on multiple injectors.
- injectors not shown
- the Fuel distributor 2 has an elongated shape and serves to distribute a Fuel on multiple injectors.
- everyone in the state of the Distributors known in the art can be used, for example, as in U.S. Patent 5,577,478 and U.S. Patent 5,056,489.
- the connector 4 can be, for example, an O-ring Seal 5 made of a material resistant to the fuel used be sealed sealing, with other known measures for sealing Connection, for example terminals, etc. can be used.
- the attachment of the Connector 4 to the tubular fuel rail 2 can be used by anyone skilled in the art known way take place, for example by screwing, clamping, etc.
- the Connector 4 is formed on the side facing the fuel rail 2 in such a way that the elastic tubular body 1 can be attached to it in a sealing connection.
- This includes, for example, a connector 15 provided in the connector 4 Surveys z. B. in the form of ribs 17 on its surface and one elastic tube body 1 corresponding diameter to which this is friction can be applied. Clamps and other means for tight 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 at that of the connector 4th downstream end sealingly connected to a pressure regulator 6.
- a pressure regulator 6 is also referred to as the system side and from which the fuel is injected into the combustion chamber of the Internal combustion engine came, separately.
- the connection of the elastic tubular body 1 with the pressure regulator 6 can be done in any known manner, for example by a nozzle 16 with ribs 18 as with respect to the connector 4 of the inlet described.
- the pressure regulator 6 is divided, for example, into two housing parts 6a and 6b, which are separated from one another are separated by a membrane 7.
- a membrane 7 In the membrane 7 is one with a Guide pin 8 provided rigid piston 9 provided by one in the housing part 6a provided spring 10 is biased.
- the piston 9 connected to the membrane 7 is on together with the guide pin 8 by the force supplied by the spring 10 a bearing surface 11 arranged in the housing part 6b, in which a Opening 11a for receiving and guiding the pin 8 is located.
- the bearing surface 11 is sealingly connected at its edges to the housing part 6b, so that the opening 11a only access to the outer fuel chamber 2a, the system side.
- Support surface 11 protruding pin 8 On the upstream side of the support surface 11 is one of a rigid Material formed ball 12 by a spring 13 against the out of the opening 11a Support surface 11 protruding pin 8 is biased. It is a means of managing the Ball 12 provided so that it is depending on the pressure from the system or inlet side can move towards or away from the opening 11a. This is the preload the springs 10 and 13 selected such that in the idle state by pressing the spring 10 of Piston 9 is pressed onto the bearing surface 11, the supply of fuel in the outer fuel chamber 2a is prevented by the opening 11a.
- the pressure regulator 6 is sealingly attached to the fuel rail 2, for example by means of a seal 19.
- the pressure pulsations transmitted to the elastic tubular body 1 are in turn in the tubular body 1 on the inside of the fuel compartment 1a Inlet pressure flowing fuel transfer, the pulsations in the elastic Pipe body 1 can be intercepted. Through the opening and closing movement of the Pressure regulator 6 generated pulsations are also damped.
- the damping of the pressure pulsations in the outer fuel chamber 2a does not only the pressure fluctuations in the outer fuel chamber 2a with the accompanying impairment of the injection quantities in the respective injection valves, but instead also the associated noise emissions.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- Fig. 1
- einen Schnitt durch einen Kraftstoffverteiler mit einem Dämpferelement.
Claims (6)
- Kraftstoffversorgungssystem einer Brennkraftmaschine mit Kraftstoffeinspritzung mit einem Kraftstoffverteiler (2), von dem aus Einspritzventile über Ventilaufnahmen (3) mit Kraftstoff versorgt werden, mit einem Dämpferelement zur Dämpfung von Druckschwingungen, wobei das Dämpferelement einen in dem Kraftstoffverteiler (2) angeordneten Rohrkörper (1) aufweist, der einen von dem Kraftstoff durchströmten inneren Kraftstoffraum (1a) von einem mit den Ventilaufnahmen (3) verbundenen und von den Kraftstoff durchströmten äußeren Kraftstoffraum (2a) dichtend abtrennt und dessen Wandung aus einem elastischen Material besteht, und mit einem Druckregler (6),
dadurch gekennzeichnet, dass der innere Kraftstoffraum (1a) des elastischen Rohrkörpers (1) Teil eines Zulaufabschnitts des Kraftstoffversorgungssystems ist, wobei an dessen stromabwärtigen Ende der Druckregler (6) angeordnet ist, über den der Kraftstoff erst nachfolgend in den äußeren Kraftstoffraum (2a) gelangt. - Kraftstoffversorgungssystem nach Anspruch 1,
dadurch gekennzeichnet, dass der Druckregler (6) ein Druckminderventil ist, das in dem äußeren Kraftstoffraum (2a) einen konstanten Kraftstoffdruck einstellt. - Kraftstoffversorgungssystem nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass der Druckregler (6) mit dem Kraftstoffverteiler (2) integriert ist. - Kraftstoffversorgungssystem nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der elastische Rohrkörper (1) aus Gummi, Kunststoff und/oder einem elastischen, flüssigkeitsdichten Gewebe besteht. - Kraftstoffversorgungssystem nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass an dem Kraftstoffverteiler (2) Zulauf- und Ablaufstutzen (15, 16) zur Aufnahme des elastischen Rohrkörpers (1) vorgesehen sind, die mit Rippen (17, 18) versehen sind. - Kraftstoffversorgungssystem nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Kraftstoffverteiler (2) rücklauffrei ausgeführt ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19807702 | 1998-02-24 | ||
| DE19807702A DE19807702A1 (de) | 1998-02-24 | 1998-02-24 | Dämpferelement für ein Kraftstoffversorgungssystem |
| PCT/DE1998/003441 WO1999043953A1 (de) | 1998-02-24 | 1998-11-23 | Dämpferelement für ein kraftstoffversorgungssystem |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1058784A1 EP1058784A1 (de) | 2000-12-13 |
| EP1058784B1 true 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 US US09/622,875 patent/US6431149B1/en not_active Expired - Fee Related
- 1998-11-23 KR KR1020007009308A patent/KR20010034538A/ko not_active Withdrawn
- 1998-11-23 BR BR9815685-3A patent/BR9815685A/pt active Search and Examination
- 1998-11-23 EP EP98965588A patent/EP1058784B1/de not_active Expired - Lifetime
- 1998-11-23 DE DE59803156T patent/DE59803156D1/de not_active Expired - Lifetime
- 1998-11-23 JP JP2000533666A patent/JP2002505401A/ja active Pending
- 1998-11-23 CZ CZ20003079A patent/CZ291330B6/cs not_active IP Right Cessation
- 1998-11-23 WO PCT/DE1998/003441 patent/WO1999043953A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CZ20003079A3 (en) | 2001-05-16 |
| WO1999043953A1 (de) | 1999-09-02 |
| EP1058784A1 (de) | 2000-12-13 |
| JP2002505401A (ja) | 2002-02-19 |
| US6431149B1 (en) | 2002-08-13 |
| CZ291330B6 (cs) | 2003-02-12 |
| BR9815685A (pt) | 2000-10-24 |
| DE19807702A1 (de) | 1999-08-26 |
| KR20010034538A (ko) | 2001-04-25 |
| DE59803156D1 (de) | 2002-03-28 |
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