EP1582740A2 - Pompe à haute-pression avec accumulateur haute-pression intégré - Google Patents

Pompe à haute-pression avec accumulateur haute-pression intégré Download PDF

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Publication number
EP1582740A2
EP1582740A2 EP05101680A EP05101680A EP1582740A2 EP 1582740 A2 EP1582740 A2 EP 1582740A2 EP 05101680 A EP05101680 A EP 05101680A EP 05101680 A EP05101680 A EP 05101680A EP 1582740 A2 EP1582740 A2 EP 1582740A2
Authority
EP
European Patent Office
Prior art keywords
pump
pressure
accumulator
pressure accumulator
high 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
Application number
EP05101680A
Other languages
German (de)
English (en)
Other versions
EP1582740A3 (fr
EP1582740B1 (fr
Inventor
Uwe Nigrin
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.)
Siemens AG
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 EP1582740A2 publication Critical patent/EP1582740A2/fr
Publication of EP1582740A3 publication Critical patent/EP1582740A3/fr
Application granted granted Critical
Publication of EP1582740B1 publication Critical patent/EP1582740B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts

Definitions

  • the invention relates to a high pressure pump with a pump housing and a high-pressure accumulator integrated in the pump housing, wherein the high pressure accumulator is a high pressure seal having.
  • a generic high-pressure pump is from the unpublished Patent Application 10360534.7 of the Applicant already known.
  • the high-pressure accumulator is from an in the pump housing introduced opening and one in the opening arranged cup-shaped container formed.
  • an internal thread is formed and the pot-shaped container has a corresponding with the internal thread External thread on.
  • the cup-shaped Container are screwed into the pump housing.
  • At the Pump housing and / or cup-shaped container are sealing surfaces to provide a sealing of the high-pressure accumulator to ensure the environment. Due to the high pressures in the Accumulator but it can always come back to that Liquid from the high-pressure accumulator enters the environment.
  • the object of the invention is therefore a high-pressure pump with form a high-pressure accumulator, the secure seal the high-pressure accumulator ensures the environment.
  • the invention is based on the generic high-pressure pump on that the high pressure seal inside the pump housing is arranged.
  • the internal arrangement of High-pressure seal ensures even in the event of a leak, that no fuel in the environment, but at best can get into the pump housing.
  • An advantageous embodiment of the invention provides that formed the pump housing and the high pressure accumulator integrally are. Due to the one-piece design of high-pressure pump and high-pressure accumulator results in a particularly low Number of sealing surfaces.
  • a further preferred embodiment of the invention sees before that the high-pressure accumulator to at least one high-pressure outlet the high-pressure pump connected in parallel hydraulically is.
  • the high pressure accumulator acts as a hydraulic Damper. This is especially beneficial if the High-pressure pump is designed as a radial piston pump, there this design-induced pulsations in the promotion occur.
  • the high-pressure pump is preferably a radial piston pump with at least two piston units.
  • the pump units V-shaped arranged to each other, preferably with an angular distance of 90 ° to each other.
  • the high-pressure accumulator is preferably axial or radially to a drive shaft of the radial piston pump in Pump housing formed.
  • the axial or radial arrangement the high-pressure accumulator again allows a very compact Type of high-pressure pump.
  • the high-pressure accumulator In such an arrangement particularly easy in the high-pressure pump be introduced.
  • the invention is thus characterized by the fact that the high-pressure seal is arranged inside the pump housing. This results in a secure seal of the high-pressure accumulator to the environment. Also in case of a leak of the High pressure seal can therefore no liquid in the environment escape.
  • the high-pressure pump according to the invention is in particular as a high-pressure fuel pump for common-rail injection systems suitable because in such systems very high Pressures occur and thus special requirements for the seal the high-pressure accumulator are placed.
  • the inventive High pressure sealing can meet these requirements correspond.
  • FIG. 1 shows a radial section through a high-pressure pump 1 according to the invention.
  • the sectional plane lies in a plane with the high-pressure lines 13.
  • the high-pressure pump 1 comprises a pump housing 2 and a high-pressure accumulator 4 integrated in the pump housing 2.
  • the high-pressure accumulator lies in a radial plane located further back for the cutting plane and is therefore shown only by dashed lines.
  • the high-pressure pump 1 is designed as a radial piston pump and has two V-shaped pump units arranged to each other 7 on.
  • the pump units 7 are at an angular distance arranged at 90 ° to each other.
  • the high-pressure accumulator 4 is arranged and formed between the two pump units 7 an angular distance of 45 ° to each pump unit. 7
  • the radial piston pump is driven by an eccentric shaft 3, the rotatably disposed in the pump housing 2 is driven.
  • the radial piston pump should not be closer be taken as this already from the state of the Technique is well known. For this purpose, for example to the DE 102 28 551 A1 of the applicant.
  • the high-pressure accumulator 4 is arranged radially to the drive shaft and formed integrally with the pump housing 2. By the one-piece design of pump housing 2 and high-pressure accumulator 4 results in a very small number Sealing surfaces.
  • the high pressure accumulator 4 is through a radial bore 8 formed in the pump housing 2.
  • the radial bore 8 is opposite from the high-pressure accumulator 4 Side introduced into the pump housing 2.
  • the radial bore 8 is at a right angle to the bearing bore 9 for the Drive shaft 3 is inserted into the pump housing 2.
  • the high-pressure accumulator 4 is at its lower end with a high pressure seal 5 closed.
  • a high-pressure seal 5 For example, a threaded plug is suitable in the radial bore 8 is screwed.
  • the radial bore 8 a corresponding thread on.
  • the radial bore 8 is at its open end 10 with a sealing plug 11 closed so that the pump housing 2 to the environment is sealed. These are only the sealing a low pressure seal towards the inside of the pump. At this low pressure seal are much lower Requirements placed as to the high pressure seal 5.
  • the high-pressure seal 5 has a leak, the liquid does not get as in the prior art to the environment, but only in the radial bore. 8 and thus into the pump interior. Due to the low pressure seal will prevent the leakage current to the environment can get. This results in a secure seal of the High pressure accumulator 4.
  • the high-pressure outlets 12 of the individual pump units 7 are via high pressure lines 13 on the one hand with the high pressure connections 6 and connected to the other with the high-pressure accumulator 4.
  • the hydraulic damper ensures a low pulsation Promotion of the fluid.
  • the injector lines may be directly, i. without additional Adapter parts such as double nipple to the high pressure pump 1 are connected. This results in advantageously a particularly secure seal between the pump housing 1 and the injector lines.
  • throttle 14 For further pulsation damping can in the high pressure output. 6 an additional throttle 14 may be formed. As throttle 14 is particularly suitable for a simple aperture, which in the High-pressure outlet is introduced. The aperture 14 can be special simply formed by a stepped bore in the pump housing 2 be.
  • the high-pressure pump 1 is advantageously designed as a monoblock.
  • the cylinder heads and the pump housing 2 and the high pressure accumulator 4 integrally formed. hereby In a particularly advantageous manner, the pressure generation, Print forwarding, pressure storage and pressure distribution realized to the injector in a component. The number of high-pressure interfaces is thus on a minimum reduced.
  • Figure 2 shows an external view of a high-pressure pump with integrated High-pressure accumulator largely identical to the High pressure pump of Figure 1 is.
  • the high pressure pump only an axially arranged high-pressure accumulator 4.
  • the axially arranged high-pressure accumulator 4 takes the height of the High pressure pump 1 off, resulting in an even more compact design results.
  • the invention is not limited to the embodiments limited. That's the way it is, for example also possible that the high pressure outputs 6 and the high pressure accumulator 4 not hydraulically parallel, but connected in series are.
  • high pressure outlets are on the high pressure accumulator 4 provided.
  • the supply lines and high pressure outlets can preferably be formed in, on the high-pressure accumulator, Stiffening ribs are formed.
  • V-shaped arrangement of the pump units 7 is it is also possible, an arrangement with an angular distance to provide 180 ° to each other.
  • an arrangement with Two pump units is also an arrangement with only one or several, for example, three at an angular distance of each 120 ° staggered pump units conceivable.
  • Role shocks For stroke transmission from the drive shaft to the individual Positive displacement piston of the pump units are preferred Role shocks.
  • the roller tappets offer the advantage of having camshafts can be used with very steep ramps and also the wear is minimized.
  • the proposed high-pressure pump discloses due to the internal Arrangement of the high-pressure seal in the pump housing thus a particularly secure sealing of the high-pressure accumulator opposite the environment.
  • the proposed high-pressure pump is suitable for high-pressure fuel pump, in particular Radial piston high-pressure pump in common-rail injection systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP05101680A 2004-03-29 2005-03-04 Pompe à haute-pression avec accumulateur haute-pression intégré Expired - Fee Related EP1582740B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004015266 2004-03-29
DE200410015266 DE102004015266A1 (de) 2004-03-29 2004-03-29 Hochdruckpumpe mit integriertem Hochdruckspeicher

Publications (3)

Publication Number Publication Date
EP1582740A2 true EP1582740A2 (fr) 2005-10-05
EP1582740A3 EP1582740A3 (fr) 2006-01-18
EP1582740B1 EP1582740B1 (fr) 2007-07-04

Family

ID=34877635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05101680A Expired - Fee Related EP1582740B1 (fr) 2004-03-29 2005-03-04 Pompe à haute-pression avec accumulateur haute-pression intégré

Country Status (2)

Country Link
EP (1) EP1582740B1 (fr)
DE (2) DE102004015266A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011104052A3 (fr) * 2010-02-24 2012-06-28 Robert Bosch Gmbh Pompe haute pression et réservoir haute pression
US9593653B2 (en) 2015-01-21 2017-03-14 Ford Global Technologies, Llc Direct injection fuel pump system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007039892A1 (de) * 2007-08-23 2009-02-26 Continental Automotive Gmbh Einspritzanlage für eine Brennkraftmaschine
DE102009000964A1 (de) 2009-02-18 2010-08-19 Robert Bosch Gmbh Hochdruckkraftstoffpumpe für eine Brennkraftmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11294292A (ja) * 1998-04-15 1999-10-26 Denso Corp 蓄圧式燃料噴射装置
US6186118B1 (en) * 1999-11-10 2001-02-13 Delphi Technologies, Inc. Integrated fuel rail and direct injection fuel pump
US6398315B1 (en) * 1997-11-14 2002-06-04 Continental Teves Ag & Co. Ohg Hydraulic unit for slip-controlled brake systems
WO2002084105A1 (fr) * 2001-04-18 2002-10-24 Robert Bosch Gmbh Pompe a carburant haute pression destinee au systeme a carburant d'un moteur a combustion interne a injection directe, systeme a carburant et moteur a combustion interne
EP1302655A2 (fr) * 2001-10-12 2003-04-16 C.R.F. Società Consortile per Azioni Dispositif pour la connexion étanche d'un raccord à un injecteur de combustible pour un moteur à combustion interne

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4240590A1 (de) * 1992-12-03 1994-06-09 Uraca Pumpen Verdrängerpumpe
DE19527402A1 (de) * 1995-07-27 1997-01-30 Teves Gmbh Alfred Pumpe
DE19605781B4 (de) * 1996-02-16 2005-04-28 Zahnradfabrik Friedrichshafen Radialkolbenpumpe
DE20109077U1 (de) * 2001-05-31 2001-08-30 Fev Motorentech Gmbh Kolbenpumpe mit Speicherraum zur Erzeugung eines bedarfsgerechten Förderstroms

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6398315B1 (en) * 1997-11-14 2002-06-04 Continental Teves Ag & Co. Ohg Hydraulic unit for slip-controlled brake systems
JPH11294292A (ja) * 1998-04-15 1999-10-26 Denso Corp 蓄圧式燃料噴射装置
US6186118B1 (en) * 1999-11-10 2001-02-13 Delphi Technologies, Inc. Integrated fuel rail and direct injection fuel pump
WO2002084105A1 (fr) * 2001-04-18 2002-10-24 Robert Bosch Gmbh Pompe a carburant haute pression destinee au systeme a carburant d'un moteur a combustion interne a injection directe, systeme a carburant et moteur a combustion interne
EP1302655A2 (fr) * 2001-10-12 2003-04-16 C.R.F. Società Consortile per Azioni Dispositif pour la connexion étanche d'un raccord à un injecteur de combustible pour un moteur à combustion interne

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN Bd. 2000, Nr. 01, 31. Januar 2000 (2000-01-31) & JP 11 294292 A (DENSO CORP; TOYOTA MOTOR CORP), 26. Oktober 1999 (1999-10-26) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011104052A3 (fr) * 2010-02-24 2012-06-28 Robert Bosch Gmbh Pompe haute pression et réservoir haute pression
US9593653B2 (en) 2015-01-21 2017-03-14 Ford Global Technologies, Llc Direct injection fuel pump system

Also Published As

Publication number Publication date
EP1582740A3 (fr) 2006-01-18
DE502005000953D1 (de) 2007-08-16
DE102004015266A1 (de) 2005-10-20
EP1582740B1 (fr) 2007-07-04

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