EP1438505B1 - Element pompe et pompe a piston permettant la generation d'une haute pression de carburant - Google Patents

Element pompe et pompe a piston permettant la generation d'une haute pression de carburant Download PDF

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Publication number
EP1438505B1
EP1438505B1 EP02760107A EP02760107A EP1438505B1 EP 1438505 B1 EP1438505 B1 EP 1438505B1 EP 02760107 A EP02760107 A EP 02760107A EP 02760107 A EP02760107 A EP 02760107A EP 1438505 B1 EP1438505 B1 EP 1438505B1
Authority
EP
European Patent Office
Prior art keywords
piston
pump
plate
pump element
foot
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
EP02760107A
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German (de)
English (en)
Other versions
EP1438505A2 (fr
Inventor
Antonio Diaferia
Giuseppe Putignano
Stefano Polito
Sandra Ronaldo
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1438505A2 publication Critical patent/EP1438505A2/fr
Application granted granted Critical
Publication of EP1438505B1 publication Critical patent/EP1438505B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • 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

Definitions

  • the invention relates to a pump element for a piston pump for fuel high pressure generation in fuel injection systems of internal combustion engines according to the preamble of claim 1 and piston pumps according to the independent claim 11th
  • a radial piston pump is known in which the piston foot as well as the recess in the Kolbenfußplatte are flat.
  • the diameter of the contact surface corresponds to the diameter of the piston foot.
  • a high-pressure fuel pump in which a tappet is arranged between a cambered running drive shaft and a piston foot.
  • the bottom of the bucket tappet is designed as a resilient element and in the piston foot a concave depression is formed.
  • the bottom of the bucket tappet adapts to the drive shaft and the piston base depending on the load.
  • the invention has for its object to provide a pump element and a piston pump for high-pressure fuel production, which is simple and has a further increased reliability under all operating conditions.
  • the ring tends to carry out the mentioned unwanted rotational movements.
  • the inventive design of the pump elements suppresses the rotational movements of the ring so far that no punctual overstressing of the pump element or the ring occur more.
  • the life of the pump elements and the piston pump increases overall, without the manufacturing costs increase. Characterized in that the contact zone is greater than or equal to the cross-sectional area of the piston skirt, the unwanted tilting of the plate and the unwanted rotation of the ring are further reduced.
  • the support surface of the piston base or the contact surface with the contact surface forming surface of the recess are curved with a radius greater than twenty times the diameter of the piston skirt , This large radius of curvature ensures that manufacturing tolerances can be compensated without tilting the plates or allowing rotational movement of the ring.
  • the piston foot and the plate are positively connected to each other by a plate holder, so that the plate always rests on the ring, which prevents damage to these components and facilitates the formation of a viable lubricating film.
  • the piston foot on a collar and the plate holder is connected via the Bund.mit the piston, so that on the one hand a large contact zone between the plate and piston base is possible and on the other hand a secure positive connection between the piston and plate holder is guaranteed.
  • This solution is also easy to assemble because the number of components is very low.
  • the piston foot may also have a groove with a blasting ring and the plate holder connected to the piston via the blasting ring so that the manufacture of the piston is further simplified.
  • the plate holder is connected by forming, in particular by crimping or folding, with the plate, so that in a simple and effective way a permanently resilient connection of plate holder and plate is made.
  • the plate may have a chamfer on the side facing the piston on the circumference.
  • a particularly secure connection between plate holder and plate can be achieved if the plate has a collar and the plate holder encloses the collar.
  • the plate can also be connected directly to the piston, in particular by crimping or folding.
  • the number of components is further reduced, which has a positive effect on the manufacturing cost.
  • a piston pump for fuel production in fuel injection systems of internal combustion engines in particular in a common rail fuel injection system, with at least one pump element, characterized in that the at least one pump element is a pump element according to one of the preceding claims.
  • the advantages of the invention come fully into play.
  • Fig. 1 is a section through a equipped with inventive pump elements 1 radial piston pump for fuel high pressure generation in injection systems of internal combustion engines.
  • radial piston pump In this generally designated 3 radial piston pump three pump elements 1 are arranged at an angle of 120 ° to each other about a drive shaft 5. In the cutting plane of Fig. 1 an eccentric portion of the drive shaft 5 is shown. Above and below the plane of the drawing, the drive shaft 5 is rotatable in one Housing 7 of the radial piston pump 3 stored (not shown).
  • a pump element 1 consists of a cylinder bore 9 and a piston 11 which is sealingly guided in the cylinder bore 9.
  • the piston 11, in turn, consists of a piston shaft 13 and a piston foot 15.
  • a plate 17 is fastened to the piston foot 15.
  • a ring 19 is arranged with flats 21.
  • This polygonal ring 19 serves to convert the rotational movement of the eccentric portion of the drive shaft 5 in an oscillating motion.
  • the polygonal ring 19 should not rotate. This results in a sliding movement between the plate 17 and flattening 21. This sliding movement results in a tilting moment on the plate 17th
  • a section of a first embodiment of a pump element 1 according to the invention is shown in cross section.
  • a groove 25 is pierced in the piston 15, in the groove 25 a blasting ring 27 is inserted.
  • the piston foot has a substantially flat bearing surface 29, which projects into a recess 31 of the plate 17. At the bottom 33 of the recess 31, the support surface 29 of the piston 15 is on. This results in a substantially flat contact zone between support surface 29 and the recess 31 and the bottom 33 of the recess 31st
  • the contact zone (not designated in Fig. 2 ) is in the first embodiment as large as the cross section of the piston skirt 13, so that a very good introduction of the transmitted from the plate 17 to the piston 15 in the axial direction of the piston skirt 13 is present.
  • the above-described rotary motion of the polygonal ring 19 (see FIG Fig. 1 )
  • the radial piston pump 3 effectively prevented and there is always a flat contact zone between the piston 15 and plate 17 on the one hand and plate 17 and the flats 21 of the polygonal ring 19 is present. Therefore, it does not come to punctual overuse of the flats 21, the plate 17 or the piston foot 15. This results an increased life of the radial piston pump 3rd
  • a plate holder 35 is provided, which receives the piston skirt 13 in an opening 37.
  • a compression spring 39 which at one end is supported on the pump holder 35 and the other end on the housing 7 of the radial piston pump 3 is supported (see Fig. 1 ) presses the plate holder 35 from top dead center to bottom dead center when the eccentric portion of the drive shaft 5 (see FIG Fig. 1 ) performs the corresponding rotational movement.
  • this movement is transmitted to the piston shaft 13.
  • the plate 17 can not be detached from the piston 15, the plate holder 35 also has a bead 39, which surrounds a collar 41 of the plate 17.
  • This in Fig. 2 illustrated embodiment is manufacturing technology very easy to represent, since the piston shaft 13 and the piston 15 have the same diameter and thus can be ground in one setting.
  • the plate 17 has on the support surface 29, with the in Fig. 5 not shown ring 19 comes in Konatkt, a chamfer 40.
  • the chamfer 40 causes that even with an occurring under unfavorable circumstances rotation of the polygon-shaped ring 19, not shown, the plate holder 35 is not damaged by the resulting tilting movement of the plate 17.
  • the chamfer 40 can be provided in all embodiments of the pump element 1 according to the invention.
  • a piston 11 of a second embodiment of a pump element according to the invention is shown.
  • the adjoining the piston shaft 13 piston 15 has in this embodiment has a significantly larger diameter than the piston shaft 13. It is thereby achieved that the piston 15 has a flange 43.
  • the support surface 29 of the piston foot 15 increases.
  • the support surface 29 is slightly curved.
  • Fig. 4 is one to the piston 11 of Fig. 3 associated plate 17 shown.
  • the recess 31 is dimensioned so that the piston foot 15 fits exactly into the recess 31.
  • Fig. 5 are the piston 11 and the plate 17 according to Fig. 3 and 4 shown in assembled condition.
  • the plate holder 35 transmits the force exerted on it by the spring 38 via the collar 43 on the piston shaft 13.
  • the groove 25 and the blasting ring 27 (see Fig. 2 ) accounted for.
  • the contact zone between the piston foot 15 and plate 17 is greater than in the first embodiment.
  • the surface load between the piston 15 and the base 33 of the recess 31 in the plate 17 is further reduced.
  • that can Twisting the polygonal ring 19 see Fig. 1 ) be even more effectively prevented.
  • the disc holder 35 has first lugs 36a bent upwardly. In alternation with the first lugs 36a, the plate holder 35 has second lugs 36b which are bent downwards. By the second lugs 36 b, the plate 17 is fixed to the piston 15.
  • the plate 17 has on the bearing surface, with the in Fig. 5 not shown ring 19 comes in Konatkt, a chamfer 40.
  • the chamfer 40 causes that even with an occurring under unfavorable circumstances rotation of the polygon-shaped ring 19, not shown, the plate holder 35 is not damaged by the resulting tilting movement of the plate 17.
  • the chamfer 40 can be provided in all embodiments of the pump element 1 according to the invention.
  • FIGS. 6 and 7 a plate 17 of a third embodiment of a pump element according to the invention in cross-section and in plan view is shown.
  • no disc holder is provided.
  • the necessary form-fitting connection between the piston skirt 13 (not shown) and plate 17 is produced via a flange 45.
  • the beaded edge 45 is bent inwardly and pressed into a groove of the piston 11, not shown.
  • the groove and the flange 45 must be dimensioned so that in any case the piston 15 (not shown) rests on the base 33 of the recess 31.
  • recesses 47 are provided in the crimping edge 45.
  • pump elements are not limited to radial piston pumps, but can also be used with in-line or distributor injection pumps.

Claims (14)

  1. Elément de pompe pour une pompe à piston (3) pour la génération de haute pression de carburant dans des systèmes d'injection de carburant de moteurs à combustion interne, comprenant au moins un piston (11) disposé dans un alésage de cylindre (9), le piston (11) présentant une base de piston (15) et une tige de piston (13), avec une plaque (17) montée sur la base de piston (15), pour le transfert du mouvement d'avance d'un entraînement (5) au piston (11), la base de piston (15) présentant une surface d'appui (29) coopérant avec un renfoncement (31) de la plaque (17), la surface d'appui (29) et le renfoncement (31) formant une zone de contact, caractérisé en ce que la base de piston (15) a un plus grand diamètre que la tige de piston (13), en ce que la base de piston (15) s'adapte exactement dans le renfoncement (31) et en ce que la zone de contact est supérieure à la surface en section transversale de la tige de piston (13).
  2. Elément de pompe selon la revendication 1, caractérisé en ce que la surface d'appui (29) a une courbure convexe, de préférence avec un rayon supérieur à 20 x le diamètre de la tige de piston (13).
  3. Elément de pompe selon l'une quelconque des revendications précédentes, caractérisé en ce que la base de piston (15) et la plaque (17) sont connectées l'une à l'autre par engagement par correspondance géométrique par un support de plaque (35).
  4. Elément de pompe selon la revendication 3, caractérisé en ce que la base de piston (15) présente un épaulement (43) et en ce que le support de plaque (35) est connecté au piston (11) par le biais de l'épaulement (43).
  5. Elément de pompe selon la revendication 4, caractérisé en ce que la base de piston (15) présente une rainure (25) avec un jonc (27), et en ce que le support de plaque (35) s'appuie sur le jonc (27).
  6. Elément de pompe selon l'une quelconque des revendications 3 à 5, caractérisé en ce que le support de plaque (35) est connecté à la plaque (17) par façonnage, notamment par bordage ou pliage.
  7. Elément de pompe selon l'une quelconque des revendications 3 à 6, caractérisé en ce que la plaque (17) présente sur la périphérie, un biseau du côté tourné vers le piston (11).
  8. Elément de pompe selon l'une quelconque des revendications 3 à 7, caractérisée en ce que la plaque (17) présente un épaulement (41) et en ce que le support de plaque (35) entoure l'épaulement (41).
  9. Elément de pompe selon l'une quelconque des revendications précédentes, caractérisé en ce que la plaque (17) présente un biseau (40) sur sa surface d'appui tournée vers la bague de forme polygonale (19).
  10. Elément de pompe selon la revendication 9, caractérisé en ce que l'on réalise sur la plaque (17) un bord de bordage (45) et en ce que le bord de bordage (45) vient en prise dans la rainure (25) du piston (11) ou entoure l'épaulement (43) du piston (11).
  11. Pompe à piston pour la génération de haute pression de carburant dans des systèmes d'injection de carburant de moteurs à combustion interne, en particulier dans un système d'injection à rampe commune, comprenant au moins un élément de pompe (1), caractérisée en ce que l'au moins un élément de pompe (1) est un élément de pompe (1) selon l'une quelconque des revendications précédentes.
  12. Pompe à piston selon la revendication 11, caractérisée en ce que la pompe à piston est réalisée sous forme de pompe à piston radial.
  13. Pompe à piston selon la revendication 12, caractérisée en ce que la pompe à piston est réalisée sous forme de pompe à piston radial avec un arbre d'entraînement (5) monté dans un boîtier de pompe (7), qui est réalisé de manière excentrique, et avec de préférence plusieurs éléments de pompe (1) disposés radialement par rapport à l'arbre d'entraînement (5), les pistons (11) pouvant être déplacés d'avant en arrière dans la direction radiale par rotation de l'arbre d'entraînement (5) dans la chambre de cylindre respective et une bague (27) avec des méplats (21) étant disposée entre l'arbre d'entraînement et la plaque (17).
  14. Pompe à piston selon la revendication 11, caractérisée en ce que la pompe à piston est réalisée sous forme de pompe de distribution ou de pompe en série.
EP02760107A 2001-10-15 2002-07-27 Element pompe et pompe a piston permettant la generation d'une haute pression de carburant Expired - Lifetime EP1438505B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10150351 2001-10-15
DE10150351A DE10150351A1 (de) 2001-10-15 2001-10-15 Pumpenelement und Kolbenpumpe zur Kraftstoffhochdruckerzeugung
PCT/DE2002/002780 WO2003042534A2 (fr) 2001-10-15 2002-07-27 Element pompe et pompe a piston permettant la generation d'une haute pression de carburant

Publications (2)

Publication Number Publication Date
EP1438505A2 EP1438505A2 (fr) 2004-07-21
EP1438505B1 true EP1438505B1 (fr) 2009-12-16

Family

ID=7702265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02760107A Expired - Lifetime EP1438505B1 (fr) 2001-10-15 2002-07-27 Element pompe et pompe a piston permettant la generation d'une haute pression de carburant

Country Status (6)

Country Link
US (1) US7384246B2 (fr)
EP (1) EP1438505B1 (fr)
JP (1) JP2005509782A (fr)
AT (1) ATE452290T1 (fr)
DE (2) DE10150351A1 (fr)
WO (1) WO2003042534A2 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
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DE10157375A1 (de) * 2001-11-22 2003-06-05 Daimler Chrysler Ag Hochdruckpumpe
DE102007019261A1 (de) 2007-04-17 2008-10-23 Golle Motor Ag Radialkolbenpumpe, insbes. für Common Rail (CR)-Einspritzsysteme
HUE026768T2 (en) * 2007-10-12 2016-07-28 Delphi Int Operations Luxembourg Sarl Fuel Pump Improvements
DE102007060772A1 (de) * 2007-12-17 2009-06-18 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
DE102008000824A1 (de) * 2008-03-26 2009-10-01 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
JP5633387B2 (ja) * 2011-01-24 2014-12-03 株式会社デンソー 燃料供給ポンプ
GB201202221D0 (en) * 2012-02-09 2012-03-28 Delphi Tech Holding Sarl Improvements relating to fuel pumps
CN103726964A (zh) * 2012-10-16 2014-04-16 北京亚新科天纬油泵油嘴股份有限公司 高压共轨泵用的吸油控制装置
US10694995B2 (en) * 2017-12-05 2020-06-30 Renegade Optophysics, Llc Diagnostic eye goggle system
DE102019202336A1 (de) * 2019-02-21 2020-08-27 Robert Bosch Gmbh Exzenterantrieb einer Exzenterpumpe
DE102020104313B3 (de) * 2020-02-19 2021-01-28 Schaeffler Technologies AG & Co. KG Stößel zur Beaufschlagung eines Pumpenkolbens einer Kraftstoffhochdruckpumpe
CN111336103A (zh) * 2020-04-15 2020-06-26 四川洪量联创科技有限公司 机械隔板双凸轮容积泵
CN115306670B (zh) * 2022-01-21 2023-06-16 衢州学院 一种基于triz原理的压缩机优化结构

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US2302865A (en) 1942-01-16 1942-11-24 Hydraulic Controls Inc Pump
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DK0512138T3 (da) * 1991-05-07 1994-09-26 Hauhinco Maschf Højtrykspumpe til renset vand
DE4401074B4 (de) * 1994-01-15 2007-01-18 Robert Bosch Gmbh Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine
IT239879Y1 (it) * 1996-12-23 2001-03-13 Elasis Sistema Ricerca Fiat Perfezionamenti ad una pompa a pistoni, in particolare ad una pompa apistoni radiali per il carburante di un motore a combustione interna.
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JP4016237B2 (ja) * 1999-04-16 2007-12-05 株式会社デンソー 燃料噴射ポンプ

Also Published As

Publication number Publication date
US20040089146A1 (en) 2004-05-13
WO2003042534A3 (fr) 2003-08-14
DE50214103D1 (de) 2010-01-28
EP1438505A2 (fr) 2004-07-21
JP2005509782A (ja) 2005-04-14
WO2003042534A2 (fr) 2003-05-22
ATE452290T1 (de) 2010-01-15
US7384246B2 (en) 2008-06-10
DE10150351A1 (de) 2003-05-08

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