WO2011131484A1 - Pompe haute pression - Google Patents

Pompe haute pression Download PDF

Info

Publication number
WO2011131484A1
WO2011131484A1 PCT/EP2011/055334 EP2011055334W WO2011131484A1 WO 2011131484 A1 WO2011131484 A1 WO 2011131484A1 EP 2011055334 W EP2011055334 W EP 2011055334W WO 2011131484 A1 WO2011131484 A1 WO 2011131484A1
Authority
WO
WIPO (PCT)
Prior art keywords
rounding
pump
pressure pump
mouth region
fuel
Prior art date
Application number
PCT/EP2011/055334
Other languages
German (de)
English (en)
Inventor
Friedrich Boecking
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN2011800198106A priority Critical patent/CN102844558A/zh
Priority to EP11713254A priority patent/EP2561212A1/fr
Publication of WO2011131484A1 publication Critical patent/WO2011131484A1/fr

Links

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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/462—Delivery valves
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation

Definitions

  • the invention relates to a high-pressure pump, in particular a radial or
  • the invention relates to the field of fuel pumps for fuel injection systems of air-compression, self-igniting internal combustion engines.
  • a high-pressure pump of a fuel injection device for an internal combustion engine has a housing in which a drive shaft is arranged.
  • the drive shaft is rotatably mounted in the housing and is driven in rotation by an internal combustion engine.
  • the high-pressure pump has a plurality of pump elements arranged in the housing, each having a pump piston which is driven by the polygon ring in a lifting movement in the radial direction to the axis of rotation of the drive shaft.
  • the pump piston is guided in a cylinder bore in the housing or an insert in the housing tightly displaceable and limited with its side facing away from the transmission element in the
  • the pump working chamber has a connection with a fuel feed, for example a feed pump, via a fuel feed channel running in the housing.
  • a fuel feed for example a feed pump
  • a fuel feed channel running in the housing.
  • an inlet valve opening into the pump working space is arranged, which has a spring-loaded valve member.
  • the pump working space also has a housing extending in the fuel drain passage in communication with an outlet, which is connected for example with a memory.
  • Fuel drain passage in the pump working space is arranged an opening out of the pump working chamber exhaust valve, which also has a spring-loaded valve member.
  • the high pressure pump according to the invention with the features of claim 1 has the advantage that an embodiment is improved. Specifically, a mechanical load capacity can be improved by an optimized design in the region of the pump working space, so that the high-pressure pump is also suitable for larger pressures.
  • Direction valve leads and that during a delivery stroke of the pump piston, a delivery of fuel through the directional valve is possible.
  • the pump piston is driven by the drive shaft, with the pump piston reciprocating in the cylinder bore.
  • fuel is delivered from the pump working space via the fuel passage and the directional valve.
  • the pre-rounding of the mouth region between the fuel channel and the cylinder bore ensures a high mechanical load capacity. As a result, the robustness can be increased and / or the field of application can be extended with regard to high pressures.
  • the pre-rounding configured in the mouth region is at least substantially executed prior to hardening.
  • a post-rounding is configured at the mouth region in a hardened state.
  • the pre-rounding can be configured, for example, by a machining process.
  • Machining can also be carried out in the hard state, for example by grinding, pressure flow lapping (AFM) or by electrochemical removal (ECM).
  • AFM pressure flow lapping
  • ECM electrochemical removal
  • the pre-rounding of the mouth region is at least
  • a major axis of the ellipsoid is preferably located on an axis of the fuel channel.
  • the fuel channel may be configured through a bore.
  • the axis of the fuel channel is preferably perpendicular to an axis of the pump assembly, along which
  • Fuel channel preferably oriented perpendicular to the cylinder bore.
  • the axis of the fuel channel can meet here on the axis of the cylinder bore of the pump assembly. This results in an advantageous Verschneidungsform by the
  • Pre-rounding can be rounded evenly. This results in symmetrical force relationships and thus a high mechanical load capacity of the high-pressure pump in the region of the pump working space.
  • a mean radius of curvature of the post-rounding is set much smaller than a mean radius of curvature of the pre-rounding.
  • suitable transitions can be created by a varying radius of curvature.
  • Fig. 1 is a high-pressure pump in an excerpt, schematic, axial
  • Fig. 2 in Fig. 1 denoted by II section of a high-pressure pump according to a second embodiment of the invention
  • Fig. 3 shows the detail shown in Fig. 2 of a high-pressure pump from the III
  • FIG. 1 shows a high-pressure pump 1 in a partial, schematic, axial sectional view according to a first embodiment of the invention.
  • the high pressure pump 1 can be configured in particular as a radial or inline piston pump.
  • the high-pressure pump 1 is suitable as a fuel pump for
  • a preferred use of the high pressure pump 1 is for a fuel injection system having a fuel rail which stores diesel fuel under high pressure.
  • the high-pressure pump 1 according to the invention is also suitable for others
  • the high pressure pump 1 has a multi-part pump housing, wherein a cylinder head 2 is shown in fragmentary form.
  • the cylinder head 2 comprises a projection 3, which protrudes into a bore of a housing part of the high-pressure pump 1.
  • a drive shaft 4 is arranged and stored.
  • the drive shaft 4 has a cam 5, which rotates in operation together with the drive shaft 4 about a rotation axis 6 of the drive shaft 4.
  • the cam 5 can also be configured as a multiple cam or formed by an eccentric portion of the drive shaft 4.
  • further cams may be provided on the drive shaft 4, which are designed according to the cam 5.
  • the high-pressure pump 1 has a pump assembly 7, which is assigned to the cam 5.
  • the cam 5 drives the pump assembly 7 in a suitable manner.
  • a roller which is mounted in a roller shoe, on a
  • the high-pressure pump 1 may also have other pump assemblies that the high-pressure pump 1 may also have other pump assemblies that the high-pressure pump 1 may also have other pump assemblies that the high-pressure pump 1 may also have other pump assemblies that the high-pressure pump 1 may also have other pump assemblies that the high-pressure pump 1 may also have other pump assemblies that the high-pressure pump 1 may also have other pump assemblies that the high-pressure pump 1 may also have other pump assemblies that the high-pressure pump 1 may also have other pump assemblies that the
  • Cam 5 or another cam are assigned. Depending on the configuration, a radial or inline piston pump can thereby be realized.
  • the pump assembly 7 has a pump piston 8 which is arranged in a cylinder bore 9 of the cylinder head 2.
  • the cylinder bore 9 has an axis 10. Through the axis 10 of the cylinder bore 9 is an axis 10 of the pump assembly. 7
  • the pump piston 8 can be actuated along the axis 10. In this case takes place in the direction of 1 1 actuation of the pump piston 8 by a stroke of the cam 5.
  • a provision of the pump piston 8 against the direction of 1 1 can be realized for example via a plunger spring. If the pump piston 8 is adjusted in the direction of 1 1, then this corresponds to a delivery stroke of the pump piston 8. When the pump piston 8 is adjusted against the direction 1 1, this corresponds to a suction stroke of the pump piston 8.
  • An end face 15 of the pump piston 8 limited in the cylinder bore 9 a
  • the cylinder bore 9 in this case a step 17. Furthermore, a fuel channel 18 is provided, via which fuel into the pump working space 16 can be guided. In the fuel channel 18, an inlet valve 19 is arranged, which is designed as a directional valve 19. At a suction stroke of the
  • Fuel channel 18 fuel from a prefeed pump or the like in the
  • a fuel passage 20 is configured in the cylinder head 2 of the high pressure pump 1.
  • the fuel passage 20 leads to an exhaust valve 21, which serves as
  • Directional valve 21 is configured.
  • the exhaust valve 21 may be configured in a suitable manner in the cylinder head 2. Thereby, the exhaust valve 21 in the
  • Cylinder head 2 to be integrated.
  • other embodiments are conceivable.
  • the fuel channel 20 is configured in this embodiment by a bore. As a result, the fuel channel 20 is configured by a cylindrical recess. An axis 22 of the fuel channel 20 strikes the axis 10 of the pump assembly 7. In addition, an angle 23 of at least approximately 90 ° is formed between the axis 22 of the fuel channel 20 and the axis 10 of the pump assembly 7.
  • the fuel channel 20 has a diameter d s .
  • the fuel channel 20 opens into an opening region 24 in the pump working chamber 16.
  • the mouth region 24 is provided between the fuel channel 20 and the cylinder bore 9.
  • Mouth region 24 is a Vorverrundung 25 configured.
  • the pre-rounding 25 is configured in this embodiment on the cylinder head 2.
  • the pre-rounding 25 is configured in this embodiment on the cylinder head 2.
  • Vorverrundung 25 preferably formed on the still during processing as a soft part cylinder head 2.
  • a machining process can be used.
  • the pre-rounding 25 can be produced at least partially by milling.
  • the pre-rounding 25 is configured as a partial surface of a sphere with a radius R 3 .
  • Intersection edge 27 results with respect to the fuel channel 20.
  • Verschneidungskanten 26, 27 are configured Nachverrundungen.
  • a subsequent rounding with a radius Ri is configured at the intersection edge 27.
  • a post-rounding with the radius R 2 is configured at the intersection edge 26.
  • the recalculation of the intersection edges 26, 27 can already take place on the hard part during the production of the cylinder head 2.
  • the configuration of the post-rounding with the radii R- 1 and R 2 can be done by grinding, AFM or ECM.
  • Electrochemical ablation is an abrasive manufacturing process that is particularly used for deburring. Depending on the application, the electrochemical removal can also take place in the micrometer range. When electrochemical ablation no contact between the tool and the cylinder head 2 is required.
  • the cylinder head 2 can serve as an anode while the tool serves as a cathode.
  • the abrasive abrasive particles contained in the medium for the pressure lapping can be adapted to the particular application.
  • each of the radii R- 1 , R 2 at the intersection edges 26, 27 given significantly smaller than the radius R 3 of the pre-rounding 25 Fig. 2 shows the designated in Fig. 1 with II section of a high-pressure pump 1 according to a second embodiment.
  • the pre-rounding 25 is configured as an at least approximately conical pre-rounding 25.
  • the transitions at the edges 26, 27 are rounded here.
  • the transition from the conical pre-rounding 25 in the pump chamber 16 at the edge 26 is designed with a radius R 2 .
  • Fuel channel 20 at the edge 27 is configured with a radius Ri.
  • a radius 30 of the pre-rounding 25 is in this case adapted to the diameter d s of the fuel channel 20.
  • the radius 30 is set approximately half as large as the diameter d s .
  • One Radius 31 of the pre-rounding 25 is set larger than the radius 30. This results in a cone opening from the fuel channel 20 to the pump working chamber 16.
  • Fig. 3 shows the detail shown in Fig. 2 of a high-pressure pump 1 according to a third embodiment of the viewing direction indicated by III.
  • the pre-rounding 25 is designed asymmetrically.
  • a radius R 4 and a radius R 6 are given.
  • the radius R 6 is at least approximately half the diameter d s of the fuel channel 20.
  • the radius R 4 is greater than the radius R 6 .
  • the resulting intersection edges 26, 27 are rounded.
  • the pre-rounding 25 can be designed as a partial surface of an ellipsoid. Furthermore, the pre-rounding 25 can also be designed as a distorted cone. In this case, in relation to the respective application and the prevailing flow conditions and / or the mechanical load capacity of the cylinder head 2 in the region of the pump working chamber 16, in particular of the mouth region 24, an advantageous adaptation can take place.
  • each of the radii R 4 and R 6 is given significantly larger than each of the radii R- 1 and R 2 .
  • a cost pre-rounding 25 can be configured in the mouth region 24 of the fuel channel 20, which leads to the outlet valve 21, a cost pre-rounding 25 can be configured.
  • a mechanical Vorverrundung 25 can be incorporated, for example by means of a cutter in the soft tissue.
  • an optimized embodiment of the pre-rounding 25 with relatively low cost is possible.
  • the pre-rounding 25 by subsequent rounding, that is, by Nachverrundept be optimized. In this case, even small radii R- 1 , R 2 can be generated to round off the intersection edges 26, 27.
  • the post-rounding can be carried out in an advantageous manner only on the hard part by grinding, AFM or ECM.

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

Pompe haute pression (1) servant notamment, en tant que pompe à piston radial ou en ligne, dans des systèmes d'injection de carburant de moteurs à combustion interne à compression d'air et auto-allumage, cette pompe comportant un module de pompe (7) et un arbre d'entraînement (4). Le module de pompe (7) comporte un alésage (9) dans lequel est guidé le piston de pompe (8), le piston de pompe (8) délimitant ainsi un espace de travail de pompe (16) dans l'alésage (9). En outre, un conduit de carburant (20) débouche dans l'espace de travail de pompe (16). Une préembouchure (25) est façonnée dans une zone de passage (24) située entre le conduit de carburant (20) et l'alésage (9).
PCT/EP2011/055334 2010-04-21 2011-04-06 Pompe haute pression WO2011131484A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2011800198106A CN102844558A (zh) 2010-04-21 2011-04-06 高压泵
EP11713254A EP2561212A1 (fr) 2010-04-21 2011-04-06 Pompe haute pression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010028046 DE102010028046A1 (de) 2010-04-21 2010-04-21 Hochdruckpumpe
DE102010028046.1 2010-04-21

Publications (1)

Publication Number Publication Date
WO2011131484A1 true WO2011131484A1 (fr) 2011-10-27

Family

ID=44533547

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/055334 WO2011131484A1 (fr) 2010-04-21 2011-04-06 Pompe haute pression

Country Status (4)

Country Link
EP (1) EP2561212A1 (fr)
CN (1) CN102844558A (fr)
DE (1) DE102010028046A1 (fr)
WO (1) WO2011131484A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT512893B1 (de) * 2013-02-05 2013-12-15 Bosch Gmbh Robert Bauelement mit ineinandermündenden Hochdruckbohrungen
DE102014101308B4 (de) * 2014-02-03 2022-01-27 Stoba Holding Gmbh & Co. Kg Kraftstoffeinspritzdosiereinrichtung, Kraftstoffeinspritzdüse, Werkzeug zum Herstellen einer Kraftstoffeinspritzdosiereinrichtung und Verfahren zum Herstellen einer Kraftstoffdosiereinrichtung
DE102016211228A1 (de) * 2016-06-23 2017-12-28 Robert Bosch Gmbh Hochdruck-Kraftstoffpumpe mit einem Gehäuse und Verfahren zum Bearbeiten von Kanälen eines Gehäuses einer Hochdruck-Kraftstoffpumpe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR981999A (fr) * 1943-05-28 1951-06-01 Citroen Sa Andre Dispositifs obturateurs et leur procédé de fabrication
DE10345154A1 (de) * 2002-09-30 2004-04-22 Denso Corp., Kariya Hochdruck-Kraftstoffpumpe für einen Verbrennungsmotor
WO2005052358A1 (fr) * 2003-11-25 2005-06-09 Robert Bosch Gmbh Soupape, notamment pour une pompe a haute pression d'un systeme d'injection de carburant pour moteur a combustion interne
EP1701032A1 (fr) * 2005-03-01 2006-09-13 Jtekt Corporation Clapet anti-retour pour la pompe de carburant

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2296039A (en) * 1994-12-16 1996-06-19 Perkins Ltd Stress reduction at a high pressure fluid passage junction
JP3525883B2 (ja) * 1999-12-28 2004-05-10 株式会社デンソー 燃料噴射ポンプ
DE10160262A1 (de) * 2001-12-07 2003-06-18 Bosch Gmbh Robert Injektor, insbesondere für Common-Rail-Einspritzsysteme von Dieselmotoren
DE102005025601A1 (de) * 2005-06-03 2006-12-07 Man B & W Diesel Ag Einspritzpumpe für eine Brennkraftmaschine sowie Brennkraftmaschine
DE102006040465A1 (de) * 2006-08-29 2008-03-06 Man Diesel Se Einspritzpumpe für eine Brennkraftmaschine sowie Brennkraftmaschine
DE602006005169D1 (de) * 2006-11-27 2009-03-26 Delphi Tech Inc Gehäuse mit sich überschneidenden Durchgängen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR981999A (fr) * 1943-05-28 1951-06-01 Citroen Sa Andre Dispositifs obturateurs et leur procédé de fabrication
DE10345154A1 (de) * 2002-09-30 2004-04-22 Denso Corp., Kariya Hochdruck-Kraftstoffpumpe für einen Verbrennungsmotor
WO2005052358A1 (fr) * 2003-11-25 2005-06-09 Robert Bosch Gmbh Soupape, notamment pour une pompe a haute pression d'un systeme d'injection de carburant pour moteur a combustion interne
DE10355030A1 (de) 2003-11-25 2005-06-23 Robert Bosch Gmbh Ventil, insbesondere für eine Hochdruckpumpe einer Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1701032A1 (fr) * 2005-03-01 2006-09-13 Jtekt Corporation Clapet anti-retour pour la pompe de carburant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2561212A1 *

Also Published As

Publication number Publication date
CN102844558A (zh) 2012-12-26
DE102010028046A1 (de) 2011-10-27
EP2561212A1 (fr) 2013-02-27

Similar Documents

Publication Publication Date Title
EP2430303B1 (fr) Pompe à haute pression
WO2005052358A1 (fr) Soupape, notamment pour une pompe a haute pression d'un systeme d'injection de carburant pour moteur a combustion interne
DE102010003192B4 (de) Ventil einer Kraftstoffversorgungsanlage einer Brennkraftmaschine
DE102014223795A1 (de) Pumpe, insbesondere eine Kraftstoffhochdruckpumpe
DE102009001631A1 (de) Hochdruckpumpe und Stößelbaugruppe
WO2005078273A1 (fr) Pompe haute pression, notamment pour un dispositif d'injection de carburant dans un moteur a combustion interne
EP2522854A1 (fr) Agencement de soupape pour une pompe à carburant haute pression ainsi qu'une pompe à carburant haute pression
DE102011055871B4 (de) Kraftstoffversorgungspumpe und Verfahren zur Herstellung eines Gehäuses für diese
DE102009028381A1 (de) Hochdruckpumpe
EP2585244B1 (fr) Méthode de fabrication d'un élément métallique pour des applications haute pression
EP2561212A1 (fr) Pompe haute pression
DE102009002517A1 (de) Pumpenelement
DE102008001960A1 (de) Pumpe, insbesondere Kraftstoffhochdruckpumpe
DE102008002178A1 (de) Hochdruckpumpe
DE102008015547A1 (de) Hochdruckpumpe
DE102008043846A1 (de) Hochdruckpumpe
EP1759115B1 (fr) Pompe a haute pression pour un dispositif d'injection de carburant d'un moteur a combustion interne
WO2017220240A1 (fr) Pompe à carburant haute pression comprenant un carter et procédé d'usinage de conduits d'un carter d'une pompe à carburant haute pression
DE102017207983A1 (de) Hochdruckpumpe
DE102010031390A1 (de) Saugventil einer Kraftstoffversorgungsanlage einer Brennkraftmaschine
DE102016208973A1 (de) Elektromagnetisch betätigbares Saugventil und Kraftstoff-Hochdruckpumpe
DE102009028392A1 (de) Hochdruckpumpe
DE10355028A1 (de) Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
DE102010041213A1 (de) Hochdruckpumpe und Verfahren zum Herstellen eines Pumpengehäuses
DE102009001440A1 (de) Hochdruckpumpe

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201180019810.6

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11713254

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2011713254

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 9094/DELNP/2012

Country of ref document: IN