EP1060334B1 - Pompe a pistons radiaux pour la production d'une haute pression en vue de l'alimentation en carburant - Google Patents

Pompe a pistons radiaux pour la production d'une haute pression en vue de l'alimentation en carburant Download PDF

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Publication number
EP1060334B1
EP1060334B1 EP99907315A EP99907315A EP1060334B1 EP 1060334 B1 EP1060334 B1 EP 1060334B1 EP 99907315 A EP99907315 A EP 99907315A EP 99907315 A EP99907315 A EP 99907315A EP 1060334 B1 EP1060334 B1 EP 1060334B1
Authority
EP
European Patent Office
Prior art keywords
plate
piston pump
radial piston
pump according
groove
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
EP99907315A
Other languages
German (de)
English (en)
Other versions
EP1060334A1 (fr
Inventor
Josef Güntert
Hans-Juergen Simon
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
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
Publication of EP1060334A1 publication Critical patent/EP1060334A1/fr
Application granted granted Critical
Publication of EP1060334B1 publication Critical patent/EP1060334B1/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
    • 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
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • 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
    • F04B1/0408—Pistons
    • 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 radial piston pump for High-pressure fuel generation in fuel injection systems of internal combustion engines, especially in a common rail injection system, with one stored in a pump housing Drive shaft which is eccentric or in Has circumferential cam-like elevations, and with preferably several radially in relation to the drive shaft a piston arranged in each cylinder space, at the ends facing the drive shaft each have a plate is attached, which has a blind hole in the middle, in which is the end of the associated piston, wherein the piston has a groove on its circumference in which a snap ring is attached to a plate holder on the To attach the piston that holds the plate to the piston.
  • the invention is therefore based on the problem of a Provide radial piston pump, which at a Partial filling of the cylinder pressures from to withstands up to 2000 bar and is still simple and inexpensive can be manufactured.
  • the problem is with a radial piston pump High-pressure fuel generation in fuel injection systems of internal combustion engines, especially in a common rail injection system, with one stored in a pump housing Drive shaft which is eccentric or in Has circumferential cam-like elevations, and with preferably several radially in relation to the drive shaft a piston arranged in each cylinder space, at the ends facing the drive shaft each have a plate is attached, which has a blind hole in the middle, in which is the end of the associated piston, wherein the piston has a groove on its circumference in which a snap ring is attached to a plate holder on the To attach the piston that holds the plate to the piston, solved in that at the edge of the blind hole in the plate a cylinder countersink is attached, the game between the snap ring and the circumference of the cylinder countersink is smaller than the depth of the groove.
  • the cylinder countersink is used for mounting of the snap ring, more precisely, to accommodate the part of the Snap ring that protrudes from the groove.
  • This dimensioning of the groove and the Snap rings provide the advantage that the snap ring is always in the Groove base lies and not on the edges of the groove. Thereby damage to the seat is avoided and the Snap ring preload can be optimally used.
  • the Snap ring preload can be increased by the thickness and the diameter of the snap ring and the diameter of the groove increase.
  • Another special embodiment of the invention is characterized in that the area of Plate holder, which rests on the snap ring, radially to the Piston expands and is flat. This is the Snap ring more visible before the plate in the Plate holder is used.
  • the Assembly is simplified and assembly errors Radial piston pump according to the invention can be avoided. Consequently can save valuable time and target zero errors can be better realized.
  • Another special embodiment of the invention is characterized in that a step on the plate holder is trained.
  • the stage is used in an advantageous manner Centering a spring that is used to hold the plate to bias towards the drive shaft.
  • Another special embodiment of the invention is characterized in that the plate has a circumference Has groove in which a retaining ring is received, the abuts the plate holder. Due to the elastic Circlip becomes a non-positive and therefore free of play Connection between the plate holder and the plate reached. This ensures that the piston foot in the Operation remains in contact with the plate. When inserting the Plate in the plate holder gives way to the locking ring, see above that the plate holder can be rigid.
  • Another special embodiment of the invention is characterized in that on the plate holder Snap segments are formed on the circumference of the plate issue.
  • the snap segments have compared to those from the Prior art known claws have the advantage that they are more stable due to their size.
  • Another special embodiment of the invention is characterized in that the ends of the snap segments are each slightly bent outwards. This will make the Assembly of the plate simplified in an advantageous manner, because spread when inserting the plate into the plate holder the snap segments bent slightly outwards automatically.
  • Another special embodiment of the invention is characterized in that the ends of the snap segments each have a bevel. This will do the same Effect achieved as with the slightly curved outwards Snap segments.
  • the assembly of the plate is simplified.
  • Another special embodiment of the invention is characterized in that between the drive shaft and the plate is a polygonal or cylindrical ring is arranged.
  • the ring is used to transmit the forces from the eccentrically designed drive shaft on the plate.
  • the ring is advantageously sliding on the drive shaft stored.
  • the ring can either be cylindrical be formed or be flattened.
  • the present invention generally has the advantage that Basic idea of the present invention in a simple manner and Be applied to existing radial piston pumps can.
  • the component strength, especially at a zero funding in the suction stroke, increased without the installation space the radial piston pump increases.
  • Figure 1 shows a section of a conventional Radial piston pump for high-pressure fuel generation Fuel injection systems for internal combustion engines.
  • FIG 1 is only the part of the radial piston pump in section to which it is shown in the present invention arrives.
  • the basic structure of a radial piston pump is for example from German patent DE 42 16 877 C2 is assumed to be known and is therefore only in the following briefly described.
  • the radial piston pump according to the invention is particularly in Common rail fuel injection systems for Diesel engines used.
  • “Common rail” means so much like “common management”, “common rail” or “common distribution bar”.
  • High pressure injection systems in which the fuel is over separate lines to the individual combustion chambers are promoted the injectors in common rail injection systems fed from a common line.
  • Radial piston pump includes one in a pump housing mounted drive shaft with an eccentrically trained Shaft section.
  • On the eccentric shaft section is a polygonal ring is provided against which the Shaft section is rotatable.
  • the ring comprises several mutually offset flats against each other Piston 1 is supported.
  • the pistons 1 are each in one Cylinder chamber 2 towards the drive shaft in the radial direction movably added.
  • a plate holder 4 also called a cage or spring plate is referred to, on the associated piston 1st held.
  • the plate 3 is countered by a spring 5 pressed the ring (not shown).
  • a snap ring 6 is mounted in a groove 7 of the piston 1.
  • Figure 2 is divided into Figures 2a, 2b and 2c.
  • Figure 2a is a section of an inventive Radial piston pump shown, which is the representation of figure 1 is similar in structure. Therefore simplicity the same for parts that appear in both figures Reference numerals used.
  • Figure 2b is the plate holder shown from Figure 2a alone.
  • Figure 2c is one View of the plate holder in the direction of arrow A in Figure 2a shown.
  • FIG. 1 There is a plate 3 on the piston 1 shown in FIG. 1 appropriate.
  • the plate 3 is supported by a plate holder 4 the piston 1 held.
  • a snap ring 6 mounted in a groove 7 on the circumference of the piston 1 is provided.
  • the plate holder 4 by a Spring (see Figure 1) pressed against the snap ring 6.
  • the dimensioning of the snap ring 6 and the cylinder countersink 26 is shown enlarged in FIG.
  • the tolerances are according to the invention chosen so that the snap ring 6 is always in the Lowering 26 lies.
  • Dimension 1 is designed so that it is always smaller than dimension even with the most unfavorable tolerance position. 2. This locks the snap ring 6 in the depression 26 and cannot slide off the piston 1.
  • the dimensioning of the snap ring 6 and the groove 7 is in Figure 6 is shown enlarged.
  • the tolerances of the groove 7 and of the snap ring 6 are chosen so that the snap ring 6 always in the groove base 60 and not at the edges 61, 62 of the groove 7. This prevents damage to the seat.
  • the Wire diameter of the snap ring 6, the diameter of the Snap rings 6 and the diameter of the groove enlarged. Thereby a higher snap ring preload can be realized than in the solution shown in Figure 1.
  • the Region of the plate holder 4 which bears against the piston 1 which bears against the piston 1, the shape of a round disc 20, which is radial to the Piston 1 extends. This ensures that the groove 7th can be viewed before the plate 3 in the Plate holder 4 is used.
  • the plate 3 is with a Bevel 25 equipped, which is spaced from the stage 21 is.
  • Three snap segments 22 extend from step 20 parallel to the piston 1.
  • the ends 23 of the snap segments 22 are first bent inwards and then slightly outwards.
  • the inwardly curved piece of the snap segments 22 forms in the plate holder 4 an annular space, which is used to hold a Federal 24 is used, which is formed on the plate 3.
  • the outwardly bent end pieces 23 of the snap segments 22 facilitate the insertion of the plate 3 in the plate holder 4th
  • FIG. 3 In the embodiment shown in FIG. 3, as in FIG Figure 2a, only a portion of a piston 1 shown.
  • the End of the piston 1 is received in a blind hole 9, the is mounted centrally in a plate 3.
  • the plate 3 is held by a plate holder 4 on the piston 1.
  • the Plate holder 4 is on the piston 1 by a snap ring 6 attached.
  • the snap ring 6 is partially in a groove 7 of the Piston 1 and partially in a cylinder countersink 26 Plate 3 added.
  • the plate holder 4 is around a rotating part on which a step 21 is formed. Of the stage 21 extends parallel to the piston 1 continuous collar 32.
  • the edge of the collar 32 of the Plate holder 4 is provided with a bevel 40, which facilitates the assembly of the plate 3.
  • a groove 30 is attached to the circumference of the round plate 3, in a locking ring 31 is received.
  • the locking ring 31 is resilient and can be used in the assembly of Plate 3 are pressed into the groove 30. That has the advantage, that the plate holder 4 with the continuous collar 32 and can be rigid.
  • the plate holder 4 in contrast to that in FIG. 3 shown embodiment as a deep-drawn part with rounded Edges formed.
  • the edge of the collar 32 of the Plate holder 4 as in that shown in Figure 3 Design, with a 40-bevel, which the Assembly of the plate 3 facilitated.

Landscapes

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

Claims (9)

  1. Pompe à pistons radiaux destinée à produire une haute pression de carburant pour des systèmes d'injection de carburant sur des moteurs à combustion interne, en particulier pour un système d'injection à rampe commune (Common Rail), comportant un arbre d'entrainement, monté dans un boítier de pompe, conçu de façon excentrique ou qui présente, en direction périphérique, des bossages en forme de came et comportant de préférence plusieurs pistons (1) disposés radialement par rapport à l'arbre d'entraínement dans une chambre de cylindre (2) particulière et dont les extrémités orientées vers l'arbre d'entraínement portent respectivement une plaque (3) munie au centre d'un trou borgne (9) dans lequel est logée l'extrémité du piston (1) correspondant, le piston (1) présentant à sa périphérie une rainure (7) dans laquelle est placée une bague élastique (6) pour fixer sur le piston (1) un support de plaque (4) qui maintient la plaque (3) sur le piston (1),
    caractérisée en ce qu'
    un renfoncement de cylindre (26) est pratiqué dans la plaque (3) sur le bord du trou borgne (9), le diamètre du renfoncement de cylindre (26) étant dimensionné de telle sorte que le jeu entre la bague élastique (6) et la périphérie du renfoncement de cylindre (26) est plus petit que la profondeur de la rainure (7).
  2. Pompe à pistons radiaux selon la revendication 1,
    caractérisée en ce que
    le rayon de la rainure (7) est plus grand que le rayon du fil métallique de la bague élastique (6).
  3. Pompe à pistons radiaux selon l'une des revendications précédentes,
    caractérisée en ce que
    la zone (20) du support de plaque (4) qui s'appuie sur la bague élastique (6) s'étend radialement par rapport au piston (1) et a une structure plane.
  4. Pompe à pistons radiaux selon l'une des revendications précédentes,
    caractérisée en ce qu'
    un gradin (21) est formé sur le support de plaque (4) radialement vers l'extérieur, au voisinage d'une zone (20) en forme de disque.
  5. Pompe à pistons radiaux selon l'une des revendications précédentes,
    caractérisée en ce que
    la plaque (3) présente sur sa périphérie une rainure (30) dans laquelle est logé un circlip (31) qui s'appuie sur le support de plaque (3).
  6. Pompe à pistons radiaux selon l'une des revendications 1 à 4,
    caractérisée en ce que
    des segments encliquetables (22) qui s'appuient sur la périphérie de la plaque (3) sont formés sur le support de plaque (4).
  7. Pompe à pistons radiaux selon la revendication 6,
    caractérisée en ce que
    les extrémités (23) des segments encliquetables (22) sont chacune légèrement courbées vers l'extérieur.
  8. Pompe à pistons radiaux selon la revendication 6,
    caractérisée en ce que
    les extrémités (40) des segments encliquetables (22) présentent chacune un biseau.
  9. Pompe à pistons radiaux selon l'une des revendication précédentes,
    caractérisée en ce qu'
    un anneau polygonal ou cylindrique est disposé entre l'arbre d'entraínement et la plaque (3).
EP99907315A 1998-03-05 1999-02-09 Pompe a pistons radiaux pour la production d'une haute pression en vue de l'alimentation en carburant Expired - Lifetime EP1060334B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19809315A DE19809315A1 (de) 1998-03-05 1998-03-05 Radialkolbenpumpe zur Kraftstoffhochdruckerzeugung
DE19809315 1998-03-05
PCT/DE1999/000345 WO1999045271A1 (fr) 1998-03-05 1999-02-09 Pompe a pistons radiaux pour la production d'une haute pression en vue de l'alimentation en carburant

Publications (2)

Publication Number Publication Date
EP1060334A1 EP1060334A1 (fr) 2000-12-20
EP1060334B1 true EP1060334B1 (fr) 2004-09-29

Family

ID=7859738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99907315A Expired - Lifetime EP1060334B1 (fr) 1998-03-05 1999-02-09 Pompe a pistons radiaux pour la production d'une haute pression en vue de l'alimentation en carburant

Country Status (5)

Country Link
US (1) US6412474B1 (fr)
EP (1) EP1060334B1 (fr)
JP (1) JP2002506163A (fr)
DE (2) DE19809315A1 (fr)
WO (1) WO1999045271A1 (fr)

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DE10039210A1 (de) * 2000-08-10 2002-02-28 Siemens Ag Radialkolbenpumpe mit zweiteiligem Federträger
DE10150351A1 (de) * 2001-10-15 2003-05-08 Bosch Gmbh Robert Pumpenelement und Kolbenpumpe zur Kraftstoffhochdruckerzeugung
DE10157375A1 (de) * 2001-11-22 2003-06-05 Daimler Chrysler Ag Hochdruckpumpe
DE10200792A1 (de) 2002-01-11 2003-07-31 Bosch Gmbh Robert Kraftstoffpumpe für eine Brennkraftmaschine
DE10203600B4 (de) * 2002-01-30 2004-12-23 Siemens Ag Leckageanschluss zum Anbringen einer Leckageleitung an einen Kraftstoffinjektor
DE10326879A1 (de) * 2003-06-14 2004-12-30 Daimlerchrysler Ag Radialkolbenpumpe zur Kraftstoffhochdruckerzeugung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen
US7726000B2 (en) * 2005-05-17 2010-06-01 Dana Automotive Systems Group, Llc Method of securing first and second splined members together
GB2463822B (en) * 2005-05-17 2010-06-09 Thomas Industries Inc Pump improvements
FR2899285B1 (fr) 2006-03-31 2008-06-27 Poclain Hydraulics Ind Soc Par Piston pour un moteur hydraulique a pistons radiaux et son procede de fabrication
DE102006032244A1 (de) * 2006-07-12 2008-01-17 Siemens Ag Radialkolbenpumpe für Hochdruck-Einspritzsysteme
JP5254979B2 (ja) * 2006-09-05 2013-08-07 ガードナー デンバー トーマス インコーポレーテッド コンプレッサー又はポンプ用流体吸入排出接続具
ES2542856T3 (es) * 2007-10-12 2015-08-12 Delphi International Operations Luxembourg S.À R.L. Mejoras relacionadas con bombas de combustible
DE102008000824A1 (de) * 2008-03-26 2009-10-01 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
IT1401914B1 (it) * 2010-09-01 2013-08-28 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna e relativo metodo di assemblaggio
JP5352646B2 (ja) * 2011-01-27 2013-11-27 株式会社日本自動車部品総合研究所 高圧ポンプ
US20130084198A1 (en) * 2011-10-04 2013-04-04 Woodward, Inc. Pump with centralized spring forces
JP6339492B2 (ja) * 2014-12-25 2018-06-06 株式会社Ｓｏｋｅｎ 高圧燃料ポンプ
DE102019106531A1 (de) * 2019-03-14 2020-09-17 Baier & Köppel GmbH & Co. KG Schmierstoffpumpe mit automatisch ankoppelnder Pumpeinheit und Verfahren zum Ankoppeln einer Pumpeinheit an eine Schmierstoffpumpe
DE102020104313B3 (de) * 2020-02-19 2021-01-28 Schaeffler Technologies AG & Co. KG Stößel zur Beaufschlagung eines Pumpenkolbens einer Kraftstoffhochdruckpumpe

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DE4216877C2 (de) * 1991-08-12 1996-08-29 Elasis Sistema Ricerca Fiat Radialkolbenpumpe
DE4213798C2 (de) * 1992-04-27 2002-10-24 Bosch Gmbh Robert Radialkolbenpumpe, insbesondere Kraftstoffpumpe für Verbrennungsmotoren
US5364234A (en) * 1992-05-20 1994-11-15 Karl Eickmann High pressure devices
US5382140A (en) * 1993-02-11 1995-01-17 Elasis Sistema Ricerca Fiat Nel Mezzogiorno Radial-piston pump
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DE19705205A1 (de) * 1997-02-12 1998-08-13 Bosch Gmbh Robert Kolbenpumpe
DE19804275A1 (de) * 1998-02-04 1999-08-12 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
BR9904868A (pt) * 1998-02-27 2000-09-26 Stanadyne Automotive Corp Bomba de fornecimento de combustìvel e processo de operar um sistema de injeção de combustìvel
EP0964150B1 (fr) * 1998-04-15 2005-06-15 Denso Corporation Système d'injection du carburant pour moteur à combustion interne

Also Published As

Publication number Publication date
US6412474B1 (en) 2002-07-02
DE59910657D1 (de) 2004-11-04
JP2002506163A (ja) 2002-02-26
WO1999045271A1 (fr) 1999-09-10
DE19809315A1 (de) 1999-09-09
EP1060334A1 (fr) 2000-12-20

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