EP1582740B1 - 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
EP1582740B1
EP1582740B1 EP05101680A EP05101680A EP1582740B1 EP 1582740 B1 EP1582740 B1 EP 1582740B1 EP 05101680 A EP05101680 A EP 05101680A EP 05101680 A EP05101680 A EP 05101680A EP 1582740 B1 EP1582740 B1 EP 1582740B1
Authority
EP
European Patent Office
Prior art keywords
pump
pressure
pressure accumulator
high pressure
accumulator
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 - Fee Related
Application number
EP05101680A
Other languages
German (de)
English (en)
Other versions
EP1582740A2 (fr
EP1582740A3 (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 has a high-pressure seal.
  • a generic high pressure pump is from the US 6,186,118 known. Another high pressure pump is from the unpublished patent application 10360534.7 the applicant already known.
  • the high-pressure accumulator is formed by an opening introduced into the pump housing and a pot-shaped container arranged in the opening. In the opening in the pump housing, an internal thread is formed and the pot-shaped container has a corresponding with the internal thread external thread. As a result, the cup-shaped container can be screwed into the pump housing.
  • On the pump housing and / or cup-shaped container sealing surfaces are provided to ensure a sealing of the high-pressure accumulator to the environment. Due to the high pressures in the accumulator but it can happen again and again that liquid from the high-pressure accumulator enters the environment.
  • the object of the invention is therefore to form a high pressure pump with a high-pressure accumulator, which ensures a secure seal of the high-pressure accumulator to the environment.
  • the invention builds on the generic high-pressure pump in that the high-pressure seal is arranged inside the pump housing.
  • the internal arrangement of the high-pressure seal ensures even in the event of a leak, that no fuel can get into the environment, but at best into the pump housing.
  • the embodiment of the invention provides that the pump housing and the high pressure accumulator are integrally formed.
  • the one-piece design of the high-pressure pump and high-pressure accumulator results in a particularly small number of sealing surfaces.
  • a preferred embodiment of the invention provides that the high pressure accumulator is hydraulically connected in parallel to at least one high pressure outlet of the high pressure pump. Due to the parallel connection of high-pressure accumulator and high-pressure outlet, the high-pressure accumulator acts as a hydraulic damper. This is particularly advantageous if the high-pressure pump is designed as a radial piston pump, since in this case pulsations occur during the delivery due to the design.
  • the high-pressure pump is preferably a radial piston pump with at least two piston units.
  • the pump units are arranged in a V-shape to each other, preferably at an angular distance of 90 ° to each other.
  • the v-shaped arrangement of the pump units results in a particularly compact Design, as between the pump units advantageously the high-pressure accumulator can be accommodated.
  • the high-pressure accumulator is formed axially or radially relative to a drive shaft of the radial piston pump in the pump housing.
  • the axial or radial arrangement of the high pressure accumulator in turn allows a very compact design of the high pressure pump.
  • the high pressure accumulator can be particularly easily introduced into the high pressure pump in such an arrangement.
  • 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. Even in the case of a leak of the high-pressure seal thus no liquid can escape into the environment.
  • the high-pressure pump according to the invention is particularly suitable as a high-pressure fuel pump for common rail injection systems, since in such systems very high pressures occur and thus special demands are placed on the sealing of the high-pressure accumulator.
  • the high-pressure seal according to the invention can meet these requirements.
  • 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 7 arranged to one another.
  • the pump units 7 are arranged at an angular distance of 90 ° to each other.
  • the high-pressure accumulator 4 is arranged between the two pump units 7 and forms an angular distance of 45 ° to each pump unit 7.
  • the radial piston pump is driven by an eccentric shaft 3 which is rotatably arranged in the pump housing 2.
  • eccentric shaft 3 which is rotatably arranged in the pump housing 2.
  • the high-pressure accumulator 4 is arranged radially to the drive shaft and formed integrally with the pump housing 2. Due to the one-piece design of pump housing 2 and high-pressure accumulator 4 results in a very small number of sealing surfaces.
  • the high-pressure accumulator 4 is formed by a radial bore 8 in the pump housing 2.
  • the radial bore 8 is thereby introduced from the high-pressure accumulator 4 opposite side in the pump housing 2.
  • the radial bore 8 is introduced at a right angle to the bearing bore 9 for the drive shaft 3 in the pump housing 2.
  • the high pressure accumulator 4 is closed at its lower end with a high pressure seal 5.
  • a high-pressure seal 5 for example, a threaded plug is screwed into the radial bore 8.
  • the radial bore 8 has a corresponding thread.
  • the radial bore 8 is closed at its open end 10 with a sealing plug 11, so that the pump housing 2 is sealed to the environment.
  • the seal is merely a low-pressure seal towards the inside of the pump.
  • the liquid does not reach the environment as in the prior art, but only in the radial bore 8 and thus in the pump interior.
  • the low-pressure seal prevents the leakage current from reaching the environment. This results in a secure seal of the high-pressure accumulator. 4
  • the high-pressure outlets 12 of the individual pump units 7 are connected via high-pressure lines 13 to the high-pressure connections 6 on the one hand and to the high-pressure accumulator 4 on the other hand.
  • this acts as a hydraulic damper.
  • the hydraulic damper ensures a low-pulsation delivery of the fluid.
  • the injector lines can be directly, i. be connected to the high-pressure pump 1 without additional adapter parts such as double nipple. This results in an advantageous manner a particularly secure seal between the pump housing 1 and the injector lines.
  • an additional throttle 14 may be formed in the high-pressure outlet 6.
  • a throttle 14 is in particular a simple aperture, which is introduced into the high-pressure outlet.
  • the aperture 14 may be particularly easily formed by a stepped bore in the pump housing 2.
  • 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 are integrally formed.
  • the pressure generation, pressure transfer, pressure storage and the pressure distribution to the injector is realized in a single component in a particularly advantageous manner.
  • the number of high-pressure interfaces is thus reduced to a minimum.
  • FIG. 2 shows an external view of a high-pressure pump with integrated high-pressure accumulator which is largely identical to the high-pressure pump according to FIG.
  • the high-pressure pump has only one axially arranged high-pressure accumulator 4. Due to the axially arranged high-pressure accumulator 4, the height of the high pressure pump 1 decreases, resulting in an even more compact design.
  • the invention is not limited to the embodiments.
  • the high-pressure outputs 6 and the high-pressure accumulator 4 are not connected in parallel hydraulically but in series.
  • high-pressure outlets are provided on the high-pressure accumulator 4.
  • the supply lines and high pressure outlets can preferably be formed in, formed on the high-pressure accumulator, stiffening ribs.
  • V-shaped arrangement of the pump units 7 it is also possible to provide an arrangement with an angular distance of 180 ° to each other.
  • an arrangement with two pump units and an arrangement with only one or more, for example, three at an angular distance of 120 ° offset from each other pump units is conceivable.
  • roller joints For stroke transmission from the drive shaft to the individual displacer of the pump units are preferably roller joints.
  • the roller tappets have the advantage that camshafts with very steep ramps can be used and also the wear is minimized.
  • the proposed high-pressure pump Due to the internal arrangement of the high-pressure seal in the pump housing, the proposed high-pressure pump thus discloses a particularly secure sealing of the high-pressure accumulator with respect to 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)

Claims (4)

  1. Pompe à pistons radiaux (1) comprenant au moins deux unités de pompe (7), un corps de pompe (2) et un accumulateur de haute pression (4) intégré dans le corps de pompe (2), l'accumulateur de haute pression (4) présentant une fermeture étanche à haute pression (5) qui est disposée intérieurement dans le corps de pompe (2), caractérisée en ce que le corps de pompe (2) et l'accumulateur de haute pression (4) sont formés en une seule pièce.
  2. Pompe à pistons radiaux (1) selon la revendication 1, caractérisée en ce que l'accumulateur de haute pression (4) est branché hydrauliquement en parallèle avec au moins une sortie de haute pression (6) de la pompe à pistons radiaux (1).
  3. Pompe à pistons radiaux (1) selon une des revendications précédentes, caractérisée en ce que les unités de pompe (7) sont disposées en V l'une par rapport à l'autre, de préférence avec un écart angulaire de 90°.
  4. Pompe à pistons radiaux (1) selon une des revendications précédentes, caractérisée en ce que l'accumulateur de haute pression (4) est placé axialement ou radialement par rapport à un arbre d'entraînement (3) de la pompe à pistons radiaux (1) à l'intérieur de corps de pompe (2).
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
DE200410015266 DE102004015266A1 (de) 2004-03-29 2004-03-29 Hochdruckpumpe mit integriertem Hochdruckspeicher
DE102004015266 2004-03-29

Publications (3)

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

Families Citing this family (4)

* 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
DE102010002291A1 (de) * 2010-02-24 2011-08-25 Robert Bosch GmbH, 70469 Hochdruckpumpe und Hochdruckspeicher
US9593653B2 (en) 2015-01-21 2017-03-14 Ford Global Technologies, Llc Direct injection fuel pump system

Family Cites Families (9)

* 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
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
DE10118884A1 (de) * 2001-04-18 2002-11-07 Bosch Gmbh Robert Hochdruck-Kraftstoffpumpe für ein Kraftstoffsystem einer direkteinspritzenden Brennkraftmaschine, Kraftstoffsystem sowie Brennkraftmaschine
DE20109077U1 (de) * 2001-05-31 2001-08-30 Fev Motorentech Gmbh Kolbenpumpe mit Speicherraum zur Erzeugung eines bedarfsgerechten Förderstroms
ITTO20010968A1 (it) * 2001-10-12 2003-04-12 C R F Societa Con Sortile Per Dispositivo di collegamento a tenuta di un raccordo su un iniettore di combustibile per motori endotermici.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102004015266A1 (de) 2005-10-20
EP1582740A2 (fr) 2005-10-05
EP1582740A3 (fr) 2006-01-18
DE502005000953D1 (de) 2007-08-16

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