EP1611343B1 - Accumulateur de carburant haute pression - Google Patents

Accumulateur de carburant haute pression Download PDF

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Publication number
EP1611343B1
EP1611343B1 EP04714773A EP04714773A EP1611343B1 EP 1611343 B1 EP1611343 B1 EP 1611343B1 EP 04714773 A EP04714773 A EP 04714773A EP 04714773 A EP04714773 A EP 04714773A EP 1611343 B1 EP1611343 B1 EP 1611343B1
Authority
EP
European Patent Office
Prior art keywords
pressure
bore
pressure fuel
fuel accumulator
housing
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
Application number
EP04714773A
Other languages
German (de)
English (en)
Other versions
EP1611343A1 (fr
Inventor
Uwe Nigrin
Mohsen Pirouz
Stefan Portner
Ngoc-Tam Vu
Johann Schneider
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.)
Continental Automotive GmbH
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1611343A1 publication Critical patent/EP1611343A1/fr
Application granted granted Critical
Publication of EP1611343B1 publication Critical patent/EP1611343B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors

Definitions

  • the invention relates to a high-pressure fuel accumulator, in particular for common-rail injection systems and a fuel pump with such a high-pressure fuel accumulator.
  • a high-pressure fuel storage which consists essentially of a drawn or rolled tube.
  • connection nipples are welded or soldered.
  • the front-side open ends of the tube are each closed by a closure element.
  • special designs of the closure element are required.
  • the sealing ball has a greater hardness than the sealing seat, which deforms this and ensures a tight fit. Due to pressure fluctuations within the accumulator as well as settling of the thread, leaks in the high-pressure fuel accumulator can nevertheless occur.
  • the object of the invention is therefore to provide a high-pressure fuel storage, which ensures a simple and cost-effective production of a secure seal of the high-pressure fuel storage.
  • the invention is characterized in that the pressure chamber is formed as a blind hole or as a through hole and is closed by a tie rod or a tie rod nut connection.
  • the tie rod is bolted to a high torque. As a result, a tensile stress acts in the tie rod, which always ensures a reliable seal of the pressure chamber even with pressure fluctuations.
  • the pressure chamber volume can be adapted to the respective requirements.
  • the manufacturing cost of the high-pressure fuel storage reduce significantly.
  • a component is arranged on or around the tie rod to adapt the pressure chamber volume.
  • both the pressure accumulator itself, as well as the tie rod be made the same for each engine variant and it is only one additional component required. There are no special requirements with regard to its strength to be considered in this component, so that it can be produced particularly inexpensively.
  • the tie rod has a sealing cone on its head, which rests in the mounted state on a, in a first end-side opening in the housing, complementarily formed sealing cone. This results in a simple way a metallic seal between the tie rod and the frontal opening in the housing.
  • the clamping nut When using a tie rod-nut connection, the clamping nut also has a sealing cone which rests in the mounted state on a, in a second end opening in the housing, complementarily formed sealing cone. Consequently Here, too, ensures a safe and simple seal between the clamping nut and the frontal opening in the housing.
  • an additional seal is arranged between the housing and the tie rod, or between the housing and the clamping nut. This prevents that any leakage current emerging via the metal seal can escape from the high-pressure fuel accumulator.
  • an additional seal is preferably an elastomeric seal, for example in the form of a simple O-ring seal.
  • the high-pressure fuel accumulator is integrated into the housing of a fuel pump. This results in a particularly compact design.
  • the pump does not have to be changed, or only slightly changed.
  • the high-pressure fuel storage 1 consists essentially of the housing 2 with a pressure chamber 3.
  • the pressure chamber 3 is formed as a through hole.
  • the pressure chamber 3 has an inlet 4 and four outlets 5 (two visible in the sectional view).
  • the inlet 4 and the expirations 5 open radially into the pressure chamber 3.
  • the frontal openings of the high-pressure fuel storage 1 are closed with a tie rod nut connection 6, 7.
  • the tie rod 6, inserted substantially axially through the pressure chamber 3 and screwed on the opposite side with a nut 7.
  • By screwing the tie rod nut connection 6, 7 tensile stresses are introduced into the tie rod 6, which ensure a secure seal of the pressure chamber 3.
  • the tie rod 6 has at its head a sealing cone 8, which rests in the assembled state on a sealing cone 9 formed in the housing of the high-pressure fuel accumulator 2 complementary.
  • the nut 7 also has a sealing cone 10, which rests in the mounted state on another in the housing of the fuel reservoir 2 complementary formed sealing cone 11. Due to the bracing of the tie rod with the nut 7, the sealing cones 8 and 9 and the sealing cones 10 and 11 each pressed firmly against each other, resulting in a secure metallic seal of the pressure chamber 3.
  • the tie rod 6 and the nut 7 each have an annular groove for receiving an additional seal 12, 13.
  • an additional seal for example, an O-ring can be used.
  • the nut 7 has an axial pressure bore and a receptacle 14 for a high-pressure sensor.
  • the pressure bore is connected via an additional bore in the nut or via a flattening in the thread of the nut with the pressure chamber.
  • the annular pressure space 3 i. the pressure chamber volume of the high-pressure fuel storage vary and adapt to the respective requirements.
  • a special high-pressure accumulator does not have to be produced for each engine variant, but only a tie rod with a corresponding diameter must be used.
  • the size of the storage volume of the pressure chamber 3 is adjustable.
  • a component is suitable for this purpose, for example, a simple sleeve.
  • the use of a sleeve has the additional advantage that both the same housing and the same tie rod can be used for all desired pressure chamber volumes. This results in a very cost-effective production of high-pressure fuel storage at the same time high flexibility of the system.
  • FIG. 2 shows a further section through the high-pressure fuel accumulator 1 in another sectional plane.
  • the high-pressure fuel storage is shown in unassembled state.
  • 11 two relief holes 15 are provided in the area of the sealing cones 9, 11 two relief holes 15 are provided.
  • the discharge holes 15 may be discharged any leakage current.
  • the relief wells are connected to the low-pressure region of the fuel injection system or leads directly into the fuel tank. This can not lead to a pressure increase in front of the additional seals 12, 13 (see FIG. 1) and thus damage to these seals.
  • Figure 3 shows a second embodiment of the high-pressure fuel storage 1.
  • the embodiment corresponds essentially to the high-pressure fuel storage of Figure 1.
  • the tie rod but not braced with a nut, but bolted directly to the housing 2 of the high-pressure fuel storage.
  • the embodiment corresponds to the embodiment of Figure 1 and 2, to the description of which reference is made here.
  • FIG. 4 shows a high-pressure fuel pump 18, in which the high-pressure fuel accumulator 1 according to the invention is integrated directly into the housing 19 of the fuel pump.
  • the pump housing 19 remain substantially unchanged, since the design of the pump housing 19 as a high pressure resistant component at certain points of the pump housing sufficient material reserves are available to integrate the high-pressure fuel storage 1.
  • high-pressure fuel outputs 17 are formed, which are each connected to the individual injectors of the internal combustion engine.
  • the integration of the high-pressure fuel accumulator 1 in the fuel pump 18 results in a very compact design of the fuel syringe system.
  • the cost-intensive production of an additional high-pressure fuel accumulator is eliminated.
  • a Anschlußplateau 16 is provided on the housing of the high-pressure fuel storage.
  • FIG. 5 shows a detailed view of the fuel pump of Figure 4.
  • a connecting bore 20 Between the pressure chamber 3 and the bore for receiving the pump shaft 21 is a connecting bore 20.
  • a pressure limiting valve 22 is arranged in the connecting bore 20.
  • the fuel via the pressure limiting valve, can flow out of the pressure chamber 3.
  • a fuel return line 23 which is introduced in the bore for receiving the pump shaft 21, the fuel can flow back further into the low-pressure region of the fuel injection system.
  • the pressure relief valve 22 may be formed as a simple mechanical pressure relief valve be.
  • On the use of an additional pressure control valve to the high-pressure pump or accumulator as it is commonly used in injection systems can be dispensed with. This results in significant cost savings and simplifications of the entire system.
  • the invention thus relates to a high-pressure fuel accumulator, the front-side openings is closed safely and inexpensively by a tie rod or a tie rod nut connection.
  • the pressure chamber volume can be adapted to the respective requirements in a very simple and cost-effective manner without additional changes to the high-pressure fuel storage itself are necessary.
  • the integration of the high-pressure fuel accumulator in the existing space of a fuel pump results in a very compact design. Due to the additional integration of a pressure relief valve can be dispensed with the use of an otherwise necessary pressure control valve to the high-pressure fuel pump or high-pressure accumulator. Overall, this results in a very compact fuel injection system, which is very variable to adapt to the particular requirements and ensures a cost-effective production reliable sealing of the high-pressure fuel storage.
  • the invention is not limited to the embodiments shown in the figures.
  • the high-pressure fuel accumulator which is integrated in the fuel pump, only as a distributor rail and additionally to use even more high-pressure fuel storage.

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

Claims (17)

  1. Accumulateur de carburant haute pression (1), en particulier pour un système d'injection à rampe commune (Common Rail), comprenant un boîtier (2) dans lequel est formée une chambre de pression (3), et qui comprend au moins une entrée (4) et au moins une sortie (5),
    caractérisé en ce que la chambre de pression (3) a la forme d'un alésage traversant, et que l'alésage traversant est fermé par un assemblage à tige d'ancrage et écrou (6) (7).
  2. Accumulateur de carburant haute pression (1), en particulier pour un système d'injection à rampe commune (Common Rail), comprenant un boîtier (2) dans lequel est formée une chambre de pression (3), et qui comprend au moins une entrée (4) et au moins une sortie (5),
    caractérisé en ce que la chambre de pression (3) a la forme d'un trou borgne, et que le trou borgne est fermé par une tige d'ancrage (6) qui est vissée dans le boîtier (2).
  3. Accumulateur de carburant haute pression selon la revendication 1 ou 2, caractérisé en ce qu'un élément est disposé sur ou autour de la tige d'ancrage (6) dont la taille permet d'ajuster le volume d'accumulation de la chambre de pression (3).
  4. Accumulateur de carburant haute pression selon l'une des revendications précédentes, caractérisé en ce qu'un cône d'étanchéité (8) est formé sur la tige d'ancrage (6), ce cône étant en contact à l'état assemblé de l'accumulateur avec un cône d'étanchéité complémentaire (9) formé dans le boîtier (2).
  5. Accumulateur de carburant haute pression selon la revendication 1, 3 ou 4, caractérisé en ce qu'un cône d'étanchéité (10) est formé sur l'écrou tendeur (7), cône qui est en contact, à l'état assemblé, avec un cône d'étanchéité complémentaire (11) formé dans le boîtier (2).
  6. Accumulateur de carburant haute pression selon l'une des revendications précédentes, caractérisé en ce qu'un joint additionnel (12) est disposé entre le boîtier (2) et la tige d'ancrage (6).
  7. Accumulateur de carburant haute pression selon la revendication 1, 3, 4, 5 ou 6, caractérisé en ce qu'un joint additionnel (13) est disposé entre le boîtier (2) et l'écrou tendeur (7).
  8. Accumulateur de carburant haute pression selon la revendication 6 ou 7, caractérisé en ce que le joint additionnel (12) (13) est un joint en élastomère.
  9. Accumulateur de carburant haute pression selon l'une des revendications précédentes, caractérisé en ce que l'écrou tendeur (7) ou le boîtier (2) comporte un alésage de pression et un raccord (14) connecté à l'alésage de pression pour la réception d'un capteur de haute pression (24).
  10. Accumulateur de carburant haute pression selon la revendication 9, caractérisé en ce que l'alésage de pression est connecté, via un alésage additionnel dans l'écrou tendeur ou le boîtier, à la chambre de pression (3).
  11. Accumulateur de carburant haute pression selon la revendication 9, caractérisé en ce que l'alésage de pression est connecté à la chambre de pression (3) via un aplatissement du filetage de l'écrou tendeur (7) ou un aplatissement du filetage de la vis d'encrage (6).
  12. Accumulateur de carburant haute pression selon l'une des revendications précédentes, caractérisé en ce qu'un alésage de décharge (15) est formé dans la région des surfaces des joints en cône, alésage par lequel un courant de fuite possible peut être évacué.
  13. Accumulateur de carburant haute pression selon la revendication 12, caractérisé en ce que l'alésage de décharge (15) est connecté à la partie basse pression du système d'injection.
  14. Accumulateur de carburant haute pression selon l'une des revendications précédentes, caractérisé en ce qu'un plateau de raccordement (16) est formé sur l'accumulateur haute pression (1) dans lequel un ou plusieurs raccords haute pression (5) sont introduits.
  15. Pompe de carburant comportant un accumulateur de carburant haute pression selon l'une des revendications précédentes, caractérisée en ce que le carter (19) de la pompe de carburant (18) est en même temps le boîtier de l'accumulateur de carburant haute pression.
  16. Pompe de carburant selon la revendication 15, caractérisée en ce qu'un alésage de connexion (20) est formé entre la chambre haute pression (3) de l'accumulateur de carburant haute pression et un alésage (21) pour recevoir l'arbre de la pompe, alésage dans lequel la soupape de limitation de pression (22) est insérée et par lequel le carburant peut s'écouler à partir de la chambre de pression lors du dépassement d'une pression d'ouverture de la soupape de limitation de pression.
  17. Pompe de carburant selon la revendication 16, caractérisée en ce qu'un conduit de retour de carburant (23) est formé dans l'alésage (21) pour recevoir l'arbre de pompe, conduit par lequel le carburant peut être retourné dans la partie basse pression du système d'injection.
EP04714773A 2003-03-04 2004-02-26 Accumulateur de carburant haute pression Expired - Lifetime EP1611343B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10309311A DE10309311B4 (de) 2003-03-04 2003-03-04 Kraftstoffhockdruckspeicher
PCT/EP2004/001936 WO2004079182A1 (fr) 2003-03-04 2004-02-26 Accumulateur de carburant haute pression

Publications (2)

Publication Number Publication Date
EP1611343A1 EP1611343A1 (fr) 2006-01-04
EP1611343B1 true EP1611343B1 (fr) 2008-01-16

Family

ID=32891837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04714773A Expired - Lifetime EP1611343B1 (fr) 2003-03-04 2004-02-26 Accumulateur de carburant haute pression

Country Status (6)

Country Link
US (2) US7040289B2 (fr)
EP (1) EP1611343B1 (fr)
JP (1) JP4200163B2 (fr)
CN (1) CN100416088C (fr)
DE (2) DE10309311B4 (fr)
WO (1) WO2004079182A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4651030B2 (ja) * 2006-05-31 2011-03-16 本田技研工業株式会社 燃料供給装置
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
US8622046B2 (en) 2010-06-25 2014-01-07 Caterpillar Inc. Fuel system having accumulators and flow limiters
DE102011077618A1 (de) * 2011-06-16 2012-12-20 Robert Bosch Gmbh Injektor, insbesondere Kraftstoffinjektor für eine Brennkraftmaschine
CN114992014A (zh) * 2022-05-26 2022-09-02 淄柴机器有限公司 一种甲醇燃料蓄压器及船用发动机系统

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4405432C1 (de) * 1994-02-21 1995-02-02 Daimler Benz Ag Hochdruckspeicher als Kraftstoffverteilungsrohr, insbesondere für eine Brennkraftmaschine mit Common-Rail-System
CN2253401Y (zh) * 1995-12-15 1997-04-30 天津大学 可控供油率的柴油机电控喷油器
EP0826873B1 (fr) * 1996-08-24 2000-05-24 Volkswagen Aktiengesellschaft Dispositif de distribution de carburant pour un moteur à combustion
DE19744762A1 (de) * 1997-03-18 1998-10-01 Poppe & Potthoff Gmbh & Co Einspritzeinrichtung für einen Dieselmotor
EP0915252A3 (fr) * 1997-11-05 2000-03-15 SIG Schweizerische Industrie-Gesellschaft Système d'injection par alimentation commune des injecteurs
DE19936533A1 (de) * 1999-08-03 2001-02-15 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE19946611A1 (de) * 1999-09-29 2001-04-12 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE19948255A1 (de) * 1999-10-07 2001-04-12 Bosch Gmbh Robert Kraftstoffhochdruckspeicher
DE10101476A1 (de) * 2001-01-12 2002-07-25 Bosch Gmbh Robert Common-Rail-Einheit
US6640783B2 (en) * 2001-02-15 2003-11-04 Delphi Technologies, Inc. Composite fuel rail with integral damping and a co-injected non-permeation layer
DE10115859A1 (de) * 2001-03-30 2002-10-17 Bosch Gmbh Robert Kraftstoffhochdruckpumpe mit integriertem Common-Rail
DE10146548B4 (de) * 2001-09-21 2006-01-26 L'orange Gmbh Hochdruckakkumulator für ein Common-Rail-Einspritzsystem
JP3856206B2 (ja) * 2001-11-06 2006-12-13 株式会社デンソー 蓄圧容器およびその製造方法
US20050047935A1 (en) * 2003-08-28 2005-03-03 Weiss Leland W. Steam powered free piston pump

Also Published As

Publication number Publication date
DE502004005960D1 (de) 2008-03-06
JP4200163B2 (ja) 2008-12-24
DE10309311A1 (de) 2004-09-23
EP1611343A1 (fr) 2006-01-04
CN100416088C (zh) 2008-09-03
WO2004079182A1 (fr) 2004-09-16
DE10309311B4 (de) 2005-01-05
US20050011495A1 (en) 2005-01-20
US7040289B2 (en) 2006-05-09
US20050247291A1 (en) 2005-11-10
JP2006509963A (ja) 2006-03-23
CN1697922A (zh) 2005-11-16
US7182069B2 (en) 2007-02-27

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