EP0925446B1 - Pompe a piston radial pour alimentation haute pression en carburant - Google Patents

Pompe a piston radial pour alimentation haute pression en carburant Download PDF

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Publication number
EP0925446B1
EP0925446B1 EP98941252A EP98941252A EP0925446B1 EP 0925446 B1 EP0925446 B1 EP 0925446B1 EP 98941252 A EP98941252 A EP 98941252A EP 98941252 A EP98941252 A EP 98941252A EP 0925446 B1 EP0925446 B1 EP 0925446B1
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EP
European Patent Office
Prior art keywords
piston pump
pump according
radial piston
valve
orifice
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
EP98941252A
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German (de)
English (en)
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EP0925446B2 (fr
EP0925446A1 (fr
Inventor
Josef Güntert
Ralf HÄGELE
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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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
    • F04B1/0421—Cylinders
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7504—Removable valve head and seat unit
    • Y10T137/7559—Pump type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7922—Spring biased
    • Y10T137/7929—Spring coaxial with valve
    • Y10T137/7931—Spring in inlet

Definitions

  • the invention relates to a radial piston pump for High-pressure fuel supply in fuel injection systems of internal combustion engines, especially in a common rail injection system, with one in a pump housing (2) Drive shaft which is eccentric or in Has a plurality of cam-like elevations circumferential direction, and with preferably several radially in relation to the drive shaft a respective cylinder space arranged pistons, which at Turn the drive shaft back and forth in the cylinder space are movable, and with a suction side and a check valve on the high pressure side and with one component a through hole forming the cylinder space, in the radially outer end of a closure element is used, wherein the closure element in the longitudinal direction of the cylinder space forming through opening closed pressure-tight to the outside is and the fuel supply to the intake side Check valve via a to the longitudinal direction essentially radial fuel supply opening takes place in the component with an element forming a valve seat, which has a central Has opening through which a tappet of a valve body extends through, the valve body one on the tap
  • DE-A 2 338 489 describes a valve-controlled high-pressure pump known, in which the valve seat of the intake side Check valve is arranged in the housing. Above this Check valve is an intake chamber by one Closure element is sealed to the outside.
  • a piston pump is a hydraulic one Brake system for a motor vehicle known in one of two Intake valves is arranged in a closure element.
  • the present invention has the object based on a more compact design of the radial piston pump specify.
  • This task is the beginning of a radial piston pump mentioned type according to the invention solved in that the Abutment is formed by a flange bushing element, and that the suction side check valve in the closure element is integrated.
  • the fact that the intake-side check valve in the Closing element is integrated, can be (for Drive shaft) radially outer intake space and the corresponding required additional outer housing wall can be dispensed with.
  • the inventive design of the abutment as Flanged bushing element has manufacturing advantages and leads thereby to an improved operating behavior of the Radial piston pump.
  • valve body of the suction-side check valve entirely in a cup-shaped Provided recess of the closure element and sealing against the mouth area of a in the bottom of the cup-shaped recess trained and communicating with the fuel supply Opening biased in the closing direction.
  • the opening mentioned can again, as mentioned at the beginning, with an oblique bore in the closure element and one between the closure element and to communicate with the component.
  • the valve body could in any way against the Bottom of the cup-shaped recess are biased. It has but is advantageous in terms of construction and assembly technology proven when on the open towards the pump piston Side of the cup-shaped recess a support for the Valve body prestressing spring in the closing direction is then between the support and the piston facing Side of the valve body is arranged. To form the Any radial projections in the support could itself Pot-shaped recess may be provided. It has in contrast, however, with a view to simple assembly as proven advantageous if the support of a kind Cover element with a flow opening for the material to be conveyed Fuel is formed.
  • the cover element could with a Be provided with an internal thread and a corresponding Flange section of the closure element can be screwed on or it could be screwed in at several points instead of one be caulked to the flange portion.
  • the closure element can be a simple one mountable screw plug acting in one on the radial provided internal thread of the outer end of the component is screwed in.
  • the through opening in the component is stepped or stepped and that Closure element with a, in particular ring collar Sealing flange sealing against a step of the through opening is pressed and the suction valve centrally within the Sealing flange is arranged.
  • a sealant used for example in the form of an elastomeric sealing ring during the sealing to the cylinder chamber by pressing of the sealing flange against the step.
  • One of the annular space can be inclined to the longitudinal direction of the Through opening in the interior of the closure element to the check valve on the intake-side check valve be provided to the suction side of the check valve with to connect the annular space in terms of flow.
  • the closure element can on its side facing the piston Side have a cup-shaped recess in which the intake-side check valve is added.
  • the intake-side check valve the preferably constructed in the manner described below can be detached from the cylinder space forming component outside of the pump housing on the Mount the locking element.
  • the valve body has a valve disk attached to the tappet, the sealing against the end face surrounding the tappet opening, ie the side of the element facing the piston can be applied.
  • valve seat and the valve body interacting with it have conical or tapered sealing surfaces, so the valve plate centers when the valve is closed Check valve by itself.
  • the valve is preferably constructed so that on the Pump piston facing away from the side in the cup-shaped recess used element a the valve body in the closing direction biasing spring is provided.
  • the spring can turn one against the element and at the other against one on the pestle support the attached abutment so that the plunger is in Closing direction, i.e. towards the bottom of the pot-shaped Recess is biased, and against the at the piston-facing side of the element formed sealing seat is created sealing.
  • the abutment on the tappet could in any way in itself be trained.
  • a Collar bushing element is formed, which with its Push the socket section onto the ram and there in basically any way, but preferably positively, in particular by a flaring operation, or by laser welding, to which the ram is attached.
  • the assembly described above is then in the Sealing the cup-shaped recess of the closure element used.
  • the element can advantageously in the cup-shaped recess is screwed in and at the same time be glued in. This way, a safe and good one tight fit can be achieved.
  • annulus training there is also no certain rotational position of the element or assembly with respect of the closure element. According to another variant, it can Element be inserted sealingly under peeling riveting.
  • this includes Closure element a valve plate, which faces the piston Forms end face of the closure element and a central Has opening through which a tappet of a valve body extends through. So according to this embodiment instead of the element inserted into the cup-shaped recess a valve plate perpendicular to the longitudinal direction of the cylinder space against the face of a closure element base body assembled.
  • the valve plate can be sealed in any way Front side of the closure element are releasably attached; it the choice of metallic seals has proven itself for this.
  • the Valve plate is therefore preferably concentric running biting edge on the base body of the closure element tightened pressure-tight. Such a bite edge is a kind of bead-like metallic elevation of the Sealing surface.
  • the fuel supply to the intake side of the check valve preferably takes place in that in the valve plate at least one in the longitudinal direction of the cylinder space in the essential radial opening is provided which with the Fuel supply opening in the cylinder space Component communicates.
  • the closure element or the closure element base body has a cup-shaped recess into which a part of the Extend the valve body, since in such a case the valve plate mentioned above a relatively small Can have thickness.
  • the above-mentioned radial opening in the valve plate could be about an oblique hole in the pot-shaped Opening. However, it proves to be manufacturing technology than easier if this radial opening in the Tappet passage opening of the valve plate on the intake side of the valve seat opens.
  • the check valve is also preferably designed such that the valve body has one attached to the tappet Has valve plate, which seals to one Tappet surrounding sealing seat on the front of the Valve plate can be put on.
  • the plunger can open the opening reach through with play in the valve plate.
  • the valve seat the sealing plate and the valve body interacting therewith preferably have conical or tapered Sealing surfaces.
  • the abutment is in one fixed on the plunger in such a way that a desired preselected opening pressure of the check valve results in the abutment with the valve body resting against the sealing seat so far is pushed against the plunger against the spring force until the desired counterforce defining the opening pressure adjusts and the abutment in this position on the ram is fixed.
  • Figures 1 and 2 show a radial piston pump High-pressure fuel supply in fuel injection systems of internal combustion engines.
  • the radial piston pump is with a integrated demand control.
  • As a control concept the principle of the suction throttle control is followed.
  • the Fuel is not supplied and dimensioned via a metering unit shown.
  • the radial piston pump comprises one in a pump housing 2 mounted drive shaft 4 with an eccentrically designed Shaft section 6.
  • On the eccentric shaft section 6 is an intermediate socket 8 is provided, opposite the Shaft section 6 is rotatable.
  • the intermediate bush 8 comprises three in each case offset by 120 ° flats 10 against each have a piston 12 with a block-like System section 14 supports.
  • the pistons 12 are each in one formed by a solid metallic component 16 Cylinder chamber 18 to the drive shaft 4 in the radial direction slidably added.
  • a passage opening 20 is provided in the component 16.
  • the Through opening 20 is stepped and has a smaller diameter forming the actual cylinder space 18 Section 22 and a larger diameter section 24.
  • a closure element 26 used pressure-tight.
  • the closure element 26 is one Locking screw 28, with the interposition of an O-ring seal 30 in the larger diameter section 24 of the Through opening 20 is screwed.
  • Reference numeral 34 denotes the intake-side check valve integrated.
  • the screw plug 28 or the check valve 34, the smaller diameter portion 22 of the through opening 20 and the compressor-side end face 36 of the pump piston 12 define a compressor or high pressure space 38. If the drive shaft 4 from the position shown in Figure 1 rotated up to 180 °, the meantime in Figure 1 above shown pistons under the action of a compression spring 40 moved out of the cylinder chamber 18. During this suction phase increases the volume of the pressure chamber 38 and the intake side Check valve 34 opens in a to be described in more detail Wise. If after further rotation of the drive shaft 4 the Piston 12 is moved in the compression direction, so it will Check valve 34 closed and one shown in Figure 2 Check valve 42 on the high-pressure side opens. The one in the print room 38 fuel under high pressure can then via a Cylinder chamber 18 outgoing branch passage 44 via the check valve 42 on the high-pressure side and a connection 46 flow into an engine piston or a high-pressure storage chamber.
  • the Screw plug 28 in the area of the axial step 32 Through opening 20 a little in its radial direction reset outer diameter and limited together with the inside of the larger diameter portion 24 of the Through opening 20 an annular space 48.
  • a radial fuel feed opening 50 opens into the component 16. Then several of the annular space 48 go to the longitudinal direction the through opening 20 from oblique bores 52, and open into a central pot-shaped recess 54 in the Locking screw 28.
  • the suction-side check valve 34 is as follows in FIG Cup-shaped recess 54 of the screw plug 28 integrated: In the free end of the cup-shaped recess facing the piston 54 is an element 58 defining a valve seat 56 screwed in pressure-tight with glue. Element 58 has one central through opening 60 for a plunger 62 a Valve body 64 on. The valve body 64 points to the piston side of the element 58 a valve plate 66 on, which can be sealed against the valve seat 56.
  • a spring 68 On the side of the element 58 facing away from the pump piston 12 inside the cup-shaped recess 54 is provided with a spring 68, which the plunger 62 of the valve body 64 in the direction of the Bottom of the cup-shaped recess 54 so that the Valve plate 66 is sealingly placed against the valve seat 56.
  • the spring 68 is supported at one end against the element 58 and at the other end against one formed by a collar bushing element 70 Abutment 72 from.
  • the flange sleeve element 70 is in one Position crimped in the plunger 62 that a predetermined Opening pressure of the check valve 34 is set.
  • the Check valve 34 is outside of the screw 28 with the desired opening pressure and then through Screwing the element 58 into the cup-shaped recess 54 in the screw plug 28 integrated.
  • FIG 4 differs of that shown in Figure 3 in that the element 58 ' not into the pot-shaped recess 54 'by means of adhesive is screwed in, but cannot be removed by peeling riveting is fixed, see reference number 74.
  • this includes intake-side check valve 80 a valve body 82, the completely in a cup-shaped recess 84 of the screw plug 86 is included.
  • the valve body 82 is via a spring 88 towards the bottom 90 of the cup-shaped recess 84 biased, the spring 88 against the inside of a Supported cover element 92, which also in cross section is cup-shaped and a flange portion 94 of the Grips screw 86 and this with several Is caulked, see reference numeral 96.
  • An annular space also provided in this embodiment 98 leads an oblique bore 100 to one from the bottom 90 of the Pot-shaped recess 84 from the introduced central Blind hole 102.
  • FIGS. 6 and 7 show a further embodiment of the Radial piston pump according to the invention.
  • Locking screw 110 comprises a locking element a valve plate 112 forming the end facing the piston, which sealing against a closure element base body 114 is dressed.
  • the valve plate 112 includes a central opening 118 through which a plunger 120 a valve body 122 of the suction-side check valve 124 round picks.
  • the plunger 120 engages in a cup-shaped Recess 126 in the closure element base body 114 and has a valve disk at its free end facing the piston 128 on, against one formed by the valve plate 112
  • Sealing seat 130 can be sealingly applied.
  • Valve disc 128 and Sealing seat 130 have conical sealing surfaces.
  • the valve plate 112 is somewhat on its radially outer circumference reset and limited there together with the Component 134 forming cylinder space 131 of piston 132 forms a Annulus 136, which has a radial fuel supply opening 138 communicates with the fuel supply in component 134.
  • the annular space 136 extends a plurality of radial feed bores 140 in the valve plate 112 and open into the Ram through opening 118 of the valve plate 112. Die Ram through opening 118 is radial in the region of the mouth somewhat widened, see reference numeral 142, so that when the Check valve 124 fuel past the plunger 120 in the Compressor room of the pump can enter.
  • the check valve 124 is also in this embodiment initially outside of component 134 and the Closure element main body 114 on the valve plate 112 assembled.
  • the flange bushing element 146 was in one such position on the plunger 120 that a Desired opening pressure of the check valve results.
  • the pre-assembled unit was then in the larger diameter Section 148 of the cylinder space 131 defining Through opening used in component 134 and screwed.
  • the closure element base body 114 sealing against the valve disk 112 via the bite edges 116 tightened and the valve disc 112 is sealed to an axial Stage 150 of component 134 pressed.

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

Claims (31)

  1. Pompe à piston radial pour l'alimentation haute pression en carburant d'un système d'injection en carburant d'un moteur à combustion interne, en particulier pour un système d'injection à rampe commune avec un arbre d'entraínement (4) logé dans un boítier de pompe (2), réalisé de manière excentrique ou présente plusieurs éléments en forme de cames dans la direction périphérique et avec de préférence plusieurs pistons (12, 132) disposés radialement par rapport à l'arbre d'entraínement (4) et ayant chacun une chambre de cylindre (18, 131) qui sont disposés coulissants d'avant en amère lors des rotations de l'arbre d'entraínement (4) et avec un clapet anti-retour (34, 42, 124) se trouvant du côté de l'aspiration et du côté haute pression et avec une pièce de construction (16, 134) avec une ouverture de passage (20) constituant la chambre de cylindre (18, 131) dans l'extrémité radiale extérieure de laquelle est installé un élément de fermeture (26, 106), l'élément de fermeture (26, 110) étant fermé étanche en pression vers l'extérieur dans la direction longitudinale de l'ouverture de passage (20) constituant la chambre cylindrique et l'alimentation en carburant vers le clapet anti-retour (34, 42, 124) du côté de l'aspiration se faisant au moyen d'une alimentation en carburant (50, 138) essentiellement radiale par rapport à la direction longitudinale, dans la pièce de construction (16, 134), avec un élément (58, 58') constituant un siège de soupape présentant une ouverture centrale (60) à travers laquelle s'étend un coulisseau (62) d'un corps de soupape (64), le corps de soupape (64) présentant une tête de soupape (66) accolée au coulisseau (62) qui peut reposer de manière étanche sur la face frontale de l'élément (58, 58') entourant l'ouverture de coulisseau (60), un ressort (68) précontraignant le corps de soupape (64) dans la direction de fermeture étant prévu sur le côté opposé au piston (12) de l'élément constituant le siège de soupape (58, 58') et le ressort (68) s'appuyant à l'une de ses extrémités contre l'élément (58, 58') et à l'autre extrémité contre le coulisseau (62),
    caractérisée en ce que
    le palier (72) est constitué par un élément de douille à collerette (70) et le clapet anti-retour se trouvant du côté de l'aspiration (34, 42, 124) est intégré dans l'élément de verrouillage (26, 110).
  2. Pompe à piston radial pour l'alimentation haute pression en carburant d'un système d'injection en carburant d'un moteur à combustion interne, en particulier pour un système d'injection à rampe commune avec un arbre d'entraínement (4) logé dans un boítier de pompe (2), réalisé de manière excentrique ou présente plusieurs éléments en forme de cames dans la direction périphérique et avec de préférence plusieurs pistons (12, 132) disposés radialement par rapport à l'arbre d'entraínement (4) et ayant chacun une chambre de cylindre (18, 131) qui sont disposés coulissants d'avant en arrière lors des rotations de l'arbre d'entraínement (4) et avec un clapet anti-retour (34, 42, 124) se trouvant du côté de l'aspiration et du côté haute pression et avec une pièce de construction (16, 134) avec une ouverture de passage (20) constituant la chambre de cylindre (18, 131) dans l'extrémité radiale extérieure de laquelle est installé un élément de fermeture (26, 106), l'élément de fermeture (26, 110) étant fermé étanche en pression vers l'extérieur dans la direction longitudinale de l'ouverture de passage (20) constituant la chambre cylindrique et l'alimentation en carburant vers le clapet anti-retour (34, 42, 124) du côté de l'aspiration se faisant au moyen d'une alimentation en carburant (50, 138) essentiellement radiale par rapport à la direction longitudinale, dans la pièce de construction (16, 134)
    caractérisée en ce que
    le clapet anti-retour (34, 42, 124) du côté de l'aspiration est intégré dans l'élément de verrouillage (26, 110), le corps de soupape (82) du clapet anti-retour (80) du côté de l'aspiration est prévu dans un évidement en forme de pot (84) de l'élément de verrouillage (86) et précontraint dans le sens de la fermeture de manière étanche contre les zones d'entrée d'une ouverture (102) réalisée dans le fond (90) de l'évidement en forme de pot (84) et communiquant avec l'alimentation en carburant.
  3. Pompe à piston radial selon la revendication 1 ou 2,
    caractérisée en ce que
    l'élément de verrouillage (26, 110) est une vis de verrouillage (28) qui est vissée dans un filetage intérieur prévu à l'extrémité radiale extérieure de la pièce de construction (16, 134).
  4. Pompe à piston radial selon l'une des revendications 1 à 3,
    caractérisée en ce que
    l'ouverture de passage (20) est réalisée décalée ou échelonnée et l'élément de verrouillage (26, 110) est pressé avec une bride d'étanchéité (30) annulaire contre un échelon (32, 150) du perçage traversant et le clapet anti-retour (34) est disposé central à l'intérieur de la bride d'étanchéité (30).
  5. Pompe à piston radial selon la revendication 4,
    caractérisée en ce qu'
    à l'opposé de la bride d'étanchéité (30), radialement à l'extérieur, on prévoit une chambre annulaire (48, 98, 136) entre l'élément de verrouillage (26, 86, 110) et la paroi de la pièce de construction (16, 134) limitant le perçage traversant (20), espace annulaire dans lequel débouche l'alimentation en carburant (50, 138).
  6. Pompe à piston radial selon la revendication 5,
    caractérisée en ce qu'
    on prévoit un perçage oblique (52, 100) s'étendant à partir de la chambre annulaire (48, 98), obliquement par rapport à la direction longitudinale de l'ouverture traversante (20) dans l'intérieur de l'élément de verrouillage (26, 86) vers le clapet anti-retour (34, 80) vers le côté d'aspiration.
  7. Pompe à piston radial selon l'une des revendications précédentes,
    caractérisée en ce que
    l'élément de verrouillage (26, 86, 110) présente un évidement en forme de pot (54, 54', 102, 126) sur son côté associé aux pistons (12, 132), évidement recevant le clapet anti-retour (34, 80, 124) du côté extérieur.
  8. Pompe à piston radial selon la revendication 7,
    caractérisée en ce que
    l'élément (58, 58') constituant le siège de soupape est installé dans l'élément (54, 54') en forme de pot.
  9. Pompe à piston radial selon la revendication 7 ou 8,
    caractérisée en ce que
    le coulisseau (62) traverse avec du jeu l'ouverture (60) de l'élément (58, 58') constituant le siège de soupape (56).
  10. Pompe à piston radial selon l'une des revendications 7, 8 ou 9,
    caractérisée en ce que
    le siège de soupape (56) et le corps de soupape (64) coopérant avec celui-ci présentent des surfaces d'étanchéité coniques ou conoïdales.
  11. Pompe à piston radial selon l'une des revendications 1 ou 3 à 10,
    caractérisée en ce que
    le palier (72) est jointoyé au coulisseau (62) au moyen d'une liaison par la forme, en particulier par sertissage.
  12. Pompe à piston radial selon l'une des revendications 1 ou 3 à 11,
    caractérisée en ce que
    le palier (72) est fixé au coulisseau (62) dans une position telle que l'on ait une pression d'ouverture prédéterminée du clapet anti-retour (34).
  13. Pompe à piston radial selon l'une des revendications 1 ou 3 à 12,
    caractérisée en ce que
    l'élément (58) est vissé et collé dans l'évidement (54).
  14. Pompe à piston radial selon l'une des revendications 1 ou 3 à 12,
    caractérisée en ce que
    l'élément (58') est amené dans l'évidement en forme de pot (54') de manière étanche par un rivetage sertissage.
  15. Pompe à piston radial selon la revendication 2,
    caractérisée en ce que
    sur le côté ouvert de l'évidement (84) en forme de pot associé au piston, on ait un appui pour un ressort (88) précontraignant le corps de soupape (82) dans la direction de fermeture.
  16. Pompe à piston radial selon la revendication 15,
    caractérisée en ce que
    l'appui est constitué par un élément de recouvrement (92) avec une ouverture de passage.
  17. Pompe à piston radial selon la revendication 16,
    caractérisée en ce que
    l'élément de recouvrement (92) est en forme de pot dans sa section et vient en prise au-dessus d'une section en forme de bride (94) de l'élément de verrouillage (86).
  18. Pompe à piston radial selon la revendication 16 ou 17,
    caractérisée en ce que
    l'élément de recouvrement (92) est maté en plusieurs points avec l'élément de verrouillage (86).
  19. Pompe à piston radial selon l'une des revendications 1 ou 2 à 7,
    caractérisée en ce que
    l'élément de verrouillage (110) comprend une plaque de soupape (112) qui constitue la face frontale de l'élément de verrouillage associé au piston avec un siège de soupape (130) et présente une ouverture centrale (118) à travers laquelle s'étend un coulisseau (120) d'un corps de soupape (122).
  20. Pompe à piston radial selon la revendication 19,
    caractérisée en ce que
    la plaque de soupape (112) est amenée étanche en pression par une arête d'accrochage (116), un corps de base (114) de l'élément de verrouillage (110).
  21. Pompe à piston radial selon la revendication 19 ou 20,
    caractérisée en ce qu'
    on prévoit au moins une ouverture (140) disposée essentiellement radiale par rapport à la direction longitudinale de la chambre de cylindre (131) dans la plaque de soupape (112), cette ouverture communiquant avec l'ouverture d'alimentation en carburant (138) dans la pièce de construction (134).
  22. Pompe à piston radial selon la revendication 21,
    caractérisée en ce que
    l'ouverture radiale (140) débouche dans l'ouverture traversante de coulisseau (118) de la plaque de soupape (112).
  23. Pompe à piston radial selon l'une des revendications 19 à 22,
    caractérisée en ce que
    le corps de base (114) de l'élément de verrouillage (110) présente un élément (126) en forme de pot de son côté associé au piston (132), évidement dans lequel vient en saillie le coulisseau (120) du clapet anti-retour (124).
  24. Pompe à piston radial selon la revendication 23,
    caractérisée en ce que
    le corps de soupape (122) présente une tête de soupape (128) associée au coulisseau (120) qui peut reposer de manière étanche sur un siège d'étanchéité (130) à la face frontale de la tête de soupape (112) entourant l'ouverture de coulisseau (118).
  25. Pompe à piston radial selon la revendication 23,
    caractérisée en ce que
    le coulisseau (120) traverse l'ouverture (118) dans la plaque de soupape (112).
  26. Pompe à piston radial selon la revendication 25,
    caractérisée en ce que
    le siège de soupape (130), la plaque de soupape (112) et le corps de soupape (122) coopérant avec eux présentent des surfaces d'étanchéité coniques ou tronconique.
  27. Pompe à piston radial selon l'une des revendications 23 à 26,
    caractérisée en ce qu'
    un ressort (144) pré-contraignant le corps de soupape (122) en direction de la fermeture est prévu sur le côté de la plaque de soupape (122) associée au piston (132).
  28. Pompe à piston radial selon la revendication 27,
    caractérisée en ce que
    le ressort (144) s'appuie d'un côté contre la plaque de soupape (112) et de l'autre côté contre un palier prévu au coulisseau (120).
  29. Pompe à piston radial selon la revendication 28,
    caractérisée en ce que
    le palier est réalisé par un élément de douille à collerette (146).
  30. Pompe à piston radial selon la revendication 28 ou 29,
    caractérisée en ce que
    le palier est jointoyé au coulisseau (122) dans le siège de presse ou par la forme, en particulier par bandage.
  31. Pompe à piston radial selon les revendications 28, 29 ou 30,
    caractérisée en ce que
    le palier est fixé au coulisseau (122) dans une position telle que l'on ait une pression d'ouverture prédéterminée du clapet anti-retour (124).
EP98941252A 1997-07-11 1998-06-30 Pompe a piston radial pour alimentation haute pression en carburant Expired - Lifetime EP0925446B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19729791 1997-07-11
DE19729791A DE19729791A1 (de) 1997-07-11 1997-07-11 Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
PCT/DE1998/001789 WO1999002858A1 (fr) 1997-07-11 1998-06-30 Pompe a piston radial pour alimentation haute pression en carburant

Publications (3)

Publication Number Publication Date
EP0925446A1 EP0925446A1 (fr) 1999-06-30
EP0925446B1 true EP0925446B1 (fr) 2003-09-03
EP0925446B2 EP0925446B2 (fr) 2010-10-20

Family

ID=7835426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98941252A Expired - Lifetime EP0925446B2 (fr) 1997-07-11 1998-06-30 Pompe a piston radial pour alimentation haute pression en carburant

Country Status (5)

Country Link
US (1) US6224350B1 (fr)
EP (1) EP0925446B2 (fr)
JP (1) JP4053094B2 (fr)
DE (2) DE19729791A1 (fr)
WO (1) WO1999002858A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004028073B3 (de) * 2004-06-09 2005-08-04 Siemens Ag Rückschlagventil
DE102005023323A1 (de) * 2005-05-20 2006-11-23 Siemens Ag Rückschlagventil

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1310755B1 (it) * 1999-11-30 2002-02-22 Elasis Sistema Ricerca Fiat Pompa idraulica ad alta pressione, in particolare pompa a pistoniradiali per il carburante di un motore a combustione interna.
DE10057683B4 (de) * 2000-11-21 2005-10-06 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung
DE10117600C1 (de) * 2001-04-07 2002-08-22 Bosch Gmbh Robert Hochdruck-Kraftstoffpumpe für ein Kraftstoffsystem einer direkteinspritzenden Brennkraftmaschine, Kraftstoffsystem sowie Brennkraftmaschine
DE10147981A1 (de) * 2001-09-28 2003-04-24 Siemens Ag Verbindungselement zur Verbindung eines Kolbens mit einem Rückstellelement
ITTO20011039A1 (it) * 2001-10-30 2003-04-30 Ct Studi Componenti Per Veicol Valvola di aspirazione per una pompa ad alta pressione, in particolare per combustibile di un motore endotermico.
US7179060B2 (en) * 2002-12-09 2007-02-20 Caterpillar Inc Variable discharge pump with two pumping plungers and shared shuttle member
DE502004007338D1 (de) * 2003-05-22 2008-07-17 Bosch Gmbh Robert Rückschlagventil, insbesondere für eine Hochdruckpumpe einer Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
KR100892527B1 (ko) 2003-12-31 2009-04-10 현대자동차주식회사 차량용 브레이크시스템
US7517200B2 (en) * 2004-06-24 2009-04-14 Caterpillar Inc. Variable discharge fuel pump
US7470117B2 (en) * 2004-11-30 2008-12-30 Caterpillar Inc. Variable discharge fuel pump
DE102005033634A1 (de) 2005-07-19 2007-01-25 Robert Bosch Gmbh Hochdruck-Kraftstoffpumpe für ein Kraftstoff-Einspritzsystem einer Brennkraftmaschine
DE102006017037B4 (de) * 2006-04-11 2015-09-17 Continental Automotive Gmbh Radialkolbenpumpe zur Kraftstoffhochdruckversorgung bei einer Brennkraftmaschine
AT504433B8 (de) * 2006-11-07 2008-09-15 Bosch Gmbh Robert Pumpenelement für eine common-rail-hochdruckpumpe
US8864478B2 (en) * 2007-06-04 2014-10-21 Caterpillar Inc. System and method for preloading a high stress area of a component
US7451741B1 (en) * 2007-10-31 2008-11-18 Caterpillar Inc. High-pressure pump
DE102008048450B4 (de) * 2008-09-23 2014-10-30 Continental Automotive Gmbh Saugventil für einen Zylinder der Kraftstoff-Hochdruckpumpe eines Common-Rail-Einspritzsystems
DE102010040459A1 (de) 2010-09-09 2012-03-15 Robert Bosch Gmbh Rückschlagventil, insbesondere für eine Kraftstoffhochdruckpumpe
DE102013220768A1 (de) 2013-10-15 2015-04-16 Continental Automotive Gmbh Ventilanordnung
EP3237747B1 (fr) * 2014-12-24 2020-02-26 Robert Bosch GmbH Unité de pompe pour fournir un carburant, de préférence un carburant diesel, à un moteur à combustion interne
US9856844B2 (en) 2015-04-28 2018-01-02 MAGNETI MARELLI S.p.A. Fuel pump for a direct injection system with a better hydraulic sealing of the intake valve
DE102015008520A1 (de) * 2015-06-30 2017-01-05 Armaturenfabrik Franz Schneider GmbH + Co. KG Absperrventil
EP3228864B1 (fr) * 2016-04-08 2018-08-01 J.P. Sauer & Sohn Maschinenbau GmbH Unite de soupape pour un compresseur a piston et compresseur a piston

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US393980A (en) * 1888-12-04 Valve for air-compressors
US255400A (en) * 1882-03-21 Air-compressor
US990604A (en) * 1909-07-16 1911-04-25 Elbridge W Stevens Process and apparatus for scavenging internal-combustion engines.
US3084709A (en) * 1960-05-19 1963-04-09 Flick Reedy Corp Removable check unit
DE2623496A1 (de) * 1976-05-26 1977-12-15 Bosch Gmbh Robert Zuendspule fuer zuendanlagen von otto-motoren
DE3046753C2 (de) * 1980-12-12 1986-02-27 Mannesmann Rexroth GmbH, 8770 Lohr Hydrostatische Radialkolbenpumpe
DE3404520C2 (de) * 1984-02-09 1997-01-09 Uraca Pumpen Pumpe oder Hydraulikanlage
US4878815A (en) * 1988-05-18 1989-11-07 Stachowiak J Edward High pressure reciprocating pump apparatus
DE3928375C2 (de) † 1989-08-28 1998-02-26 Teves Gmbh Alfred Kolbenpumpe
DE8916183U1 (de) * 1989-08-31 1994-09-22 J. Wagner Gmbh, 88048 Friedrichshafen Membranpumpe
DE4204631A1 (de) † 1992-02-15 1992-10-15 Schaeffler Waelzlager Kg Radialkolbenpumpe
US5358383A (en) * 1992-04-27 1994-10-25 Elasis Sistema Ricerca Fiat Nel Mezzogiorno Radial-piston pump for internal combustion engine fuel
DE4213798C2 (de) * 1992-04-27 2002-10-24 Bosch Gmbh Robert Radialkolbenpumpe, insbesondere Kraftstoffpumpe für Verbrennungsmotoren
DE4241825A1 (de) † 1992-12-11 1994-06-16 Teves Gmbh Alfred Geräuschreduzierte Hochdruckpumpe, insbesondere für geregelte Bremsanlagen
DE4301521A1 (de) * 1993-01-21 1994-07-28 Bosch Gmbh Robert Druckventil
US5354183A (en) * 1993-02-11 1994-10-11 Elasis Sistema Ricerca Fiat Nel Mezzogiorno Societa Consortile Per Azioni Pumping device with a main pumping stage and a supply pump
JPH06323241A (ja) * 1993-05-14 1994-11-22 Sumitomo Electric Ind Ltd プランジャポンプ
DE4316986A1 (de) * 1993-05-21 1994-11-24 Teves Gmbh Alfred Kolbenpumpe
DE4324689A1 (de) * 1993-07-23 1995-01-26 Teves Gmbh Alfred Hydraulische Bremsanlage mit Bremsschlupf- und Antriebsschlupfregelung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004028073B3 (de) * 2004-06-09 2005-08-04 Siemens Ag Rückschlagventil
DE102005023323A1 (de) * 2005-05-20 2006-11-23 Siemens Ag Rückschlagventil

Also Published As

Publication number Publication date
WO1999002858A1 (fr) 1999-01-21
DE19729791A1 (de) 1999-01-14
DE59809483D1 (de) 2003-10-09
EP0925446B2 (fr) 2010-10-20
JP4053094B2 (ja) 2008-02-27
JP2001500220A (ja) 2001-01-09
US6224350B1 (en) 2001-05-01
EP0925446A1 (fr) 1999-06-30

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