EP3368764B1 - Pompe à haute pression - Google Patents

Pompe à haute pression Download PDF

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Publication number
EP3368764B1
EP3368764B1 EP16763546.5A EP16763546A EP3368764B1 EP 3368764 B1 EP3368764 B1 EP 3368764B1 EP 16763546 A EP16763546 A EP 16763546A EP 3368764 B1 EP3368764 B1 EP 3368764B1
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EP
European Patent Office
Prior art keywords
pressure pump
high pressure
covering cap
cylinder
projection
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.)
Active
Application number
EP16763546.5A
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German (de)
English (en)
Other versions
EP3368764A1 (fr
Inventor
Dietmar Van Der Linden
Francesco Lucarelli
Karl-Heinz Laepple
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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Publication date
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Publication of EP3368764A1 publication Critical patent/EP3368764A1/fr
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Publication of EP3368764B1 publication Critical patent/EP3368764B1/fr
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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
    • 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
    • F02M59/10—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 the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • 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
    • 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
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • F02M63/0265—Pumps feeding common rails

Definitions

  • the present invention relates to a high pressure pump according to the preamble of claim 1, a method for producing a high pressure pump according to the preamble of claim 11 and a high pressure injection system according to the preamble of claim 15.
  • Piston pumps are used as high-pressure pumps.
  • a drive shaft is mounted in a housing. Pistons are arranged radially in a cylinder.
  • On the drive shaft with at least one cam rests a roller with a roller rolling surface which is mounted in a roller shoe.
  • the roller shoe is connected to the piston so that the piston is forced to make an oscillating translational movement.
  • a spring applies a force directed radially to the drive shaft to the roller shoe, so that the roller is in constant contact with the drive shaft.
  • the roller stands with the roller rolling surface on a shaft rolling surface as a surface of the drive shaft with the at least one cam in contact with the drive shaft.
  • the roller is mounted in the roller shoe by means of a slide bearing.
  • the cylinder, in particular the cylinder head, of the high-pressure pump is covered by a cap made of a hard plastic, in particular a reinforced polyamide.
  • the task of the cover cap is to optically cover possible corrosion on the cylinder head so that the corrosion is no longer visible. Because of the hard material properties of the cover cap, the cover cap can essentially not adapt to different geometries of the high pressure pump when it is fastened and pushed onto the high pressure pump.
  • the cover cap is generally fastened before an electrical connector is fastened, since due to the very little or no deformation of the electrical connector and the rest of the high-pressure pump, it is not possible to fasten the cover cap after the electrical connector has been fastened to the high-pressure pump.
  • the assembly of the high pressure pump is unnecessarily difficult.
  • the DE 10 2006 045 933 A1 shows a high-pressure pump for delivering high-pressure fuel.
  • the high pressure pump has a drive shaft with cams. Cylindrical rollers are supported by roller shoes and rest on the cams. The roller shoes are mounted in a bore in part of the housing by means of a ram assembly.
  • the pump elements are attached to the tappet assembly. A coil spring presses the tappet assembly onto the cams.
  • a radial piston pump for generating high fuel pressure in fuel injection systems of internal combustion engines is known.
  • a drive shaft is mounted in a pump housing.
  • Pistons are supported on the drive shaft so that the pistons are moved back and forth when the drive shaft is turned.
  • Tappets are arranged between the piston and the drive shaft.
  • the disclosure document DE 103 45 725 A1 shows a fluid pump, in particular a high-pressure fuel pump, with a housing and with at least one inlet side low-pressure connection, an inlet valve, and a delivery space that is delimited by a delivery element.
  • the fluid pump has a housing cover, which has a cylindrical shape with a peripheral wall and a base. The free edge of the peripheral wall is welded to the housing body.
  • WO 2015/010856 discloses a high pressure pump with a pump head and a protective cap made of metal.
  • the disclosure document DE 10 2013 206 930 A1 discloses a piston pump, which comprises a pot-shaped housing which encloses further elements of the piston pump.
  • the cup-shaped housing is designed as a drawn, embossed and bent sheet metal part which, among other things, combines the functions of a "cover” and a mounting flange of conventional high-pressure fuel pumps.
  • High pressure pump in particular for a motor vehicle, for pumping a fluid, in particular fuel, e.g. B. Diesel, comprising a drive shaft with at least one cam, at least one piston, at least one cylinder for mounting the at least one piston, the at least one piston being supported on the drive shaft with the at least one cam, so that the at least one piston has a translational movement can be executed due to a rotational movement of the drive shaft, at least one cover cap which is indirectly attached to the outside of the cylinder, one end of the at least one cover cap resting on a projection of the rest of the high-pressure pump for positive and non-positive fastening of the end of the cover cap to the projection.
  • a fluid in particular fuel
  • fuel e.g. B. Diesel
  • One end, in particular an axial end, of the at least one covering cap rests on the projection, so that the covering cap is thereby particularly easily attached to the rest of the high-pressure pump in a form-fitting and force-fitting manner.
  • this enables simple assembly of the cover cap and on the other hand, the cap is thereby particularly reliably and permanently attached to the rest of the high-pressure pump.
  • the projection is formed on the outside of the high-pressure pump and / or the projection is formed as an undercut and / or the projection is formed in the radial direction with respect to a longitudinal axis of the cylinder and the end of the at least one cover cap on an axial stop of the projection rests.
  • the projection is formed in the circumferential direction or tangential direction with respect to a longitudinal axis of the cylinder and / or the projection is formed by a ring or a nut, in particular a union nut, on the cylinder.
  • the union nut or the ring forms the projection and also the axial stop at one axial end.
  • the at least one cover cap has an essentially central opening. The opening is used for
  • the at least one cover cap has an essentially radially formed support section and an essentially axially formed support section.
  • the radial support section is formed essentially in the radial direction with respect to the longitudinal axis of the cylinder and the axial support section is formed essentially in the axial direction with respect to the longitudinal axis of the cylinder.
  • the opening is preferably formed on the radial support section.
  • the end of the at least one cover cap, which rests on the projection of the rest of the high-pressure pump, is an edge of the opening.
  • an electrical connector is arranged in the opening.
  • a recess for a fuel nozzle is formed on the at least one cover cap, in particular on the axial support section, and / or the cylinder comprises a cylinder head and / or a bearing cylinder.
  • the cylinder head delimits a working space of the high pressure pump and the bearing cylinder serves to mount the at least one piston.
  • the at least one cover cap is at least partially, in particular completely, made of an elastic plastic, preferably thermoplastic elastomer, and / or the at least one cover cap is at least partially, in particular completely, made of one Material with a modulus of elasticity less than 5, 1 or 0.2 kN / mm 2 .
  • Method according to the invention for producing a high pressure pump in particular a high pressure pump described in this patent application, with the steps: providing a drive shaft with at least one cam, providing at least one piston, providing at least one cylinder for mounting the at least one piston Provide at least one cover cap, mounting the at least one drive shaft, the at least one piston, the at least one cylinder, so that the at least one piston is supported on the drive shaft with the at least one cam and a translational movement of the at least one piston due to a rotational movement of the drive shaft is feasible, fastening the at least one cover cap indirectly on the outside of the cylinder, the cover cap first being elastically stretched for fastening and then being elastically deformed so that due to the elastic recovery, one end of the at least one cover cap rests on the projection of the rest of the high-pressure pump and the at least one cover cap is thereby attached to the projection in a form-fitting and non-positive manner.
  • an electrical connector is first mounted and then the at least one cover cap is attached and / or the at least one cover cap is expanded and elastically deformed in the radial direction with respect to the longitudinal axis of the cylinder.
  • the at least one cover cap is expediently stretched essentially at an edge of an opening than the end of the at least one cover cap, so that the size of the opening is increased by the stretching and then the elastic recovery is carried out essentially at the edge of the opening and / or the already mounted electrical connector is first passed through the opening of the at least one cover cap and then the elastic stretching of the at least one cover cap is carried out and / or the cover cap, in particular an axial support section, is stretched, in particular stretched in the radial direction, and then the cover cap, in particular the axial support section is fastened to the rest of the high-pressure pump with elastic bias.
  • the at least one piston is supported indirectly with a roller or another supporting device on the drive shaft with the at least one cam.
  • the at least one roller is expediently mounted in at least one roller shoe by means of at least one slide bearing or slide bearing.
  • the at least one roller in a section perpendicular to a longitudinal axis as the axis of rotation, surrounds the slide bearing by more than 50% of the at least one roller.
  • an eccentric shaft is viewed as a drive shaft with at least one cam.
  • a radial direction and / or axial direction relates to a longitudinal axis of the cylinder on which the cover cap rests directly or indirectly.
  • High-pressure injection system for an internal combustion engine, in particular for a motor vehicle, comprising a high-pressure pump, a high-pressure rail, preferably a prefeed pump for pumping fuel from a fuel tank to the high-pressure pump, the high-pressure pump being designed as a high-pressure pump described in this patent application.
  • the pressure that can be generated by the high pressure pump in the high pressure rail is, for example, in the range from 1000 to 3000 bar z. B. for diesel engines or between 40 bar and 400 bar z. B. for gasoline engines.
  • An internal combustion engine according to the invention with a high pressure injection system comprises a high pressure injection system described in this patent application and / or a high pressure pump described in this patent application.
  • the high-pressure pump 1 has a drive shaft 2 with two cams 3, which rotates about an axis of rotation 26.
  • the axis of rotation 26 lies in the plane of the drawing Fig. 1 and is perpendicular to the plane of the drawing Fig. 2 .
  • a piston 5 is mounted in a piston guide 7 of the mounting cylinder 15.
  • the cylinder 6 thus also forms a housing.
  • a working space 29 is delimited by the cylinder 6, in particular the cylinder head 14, and the piston 5.
  • An inlet channel 22 with an inlet valve 19 and an outlet channel 24 with an outlet valve 20 open into the working chamber 29.
  • the fuel flows into the working chamber 29 through the inlet channel 22 and the fuel flows out of the working chamber 29 again under high pressure through the outlet channel 24.
  • a check valve is designed in such a way that only fuel can flow into the working chamber 29 and the outlet valve 20, for.
  • B. a check valve is designed in such a way that only fuel can flow out of the working chamber 29.
  • the volume of the working space 29 is changed due to an oscillating stroke movement of the piston 5.
  • the piston 5 is supported indirectly on the drive shaft 2.
  • a roller shoe 9 with a roller 10 is attached to the end of the piston 5 or pump piston 5.
  • the roller 10 can perform a rotational movement, the axis of rotation 25 of which is in the plane of the drawing according to FIG Fig. 1 lies and perpendicular to the plane of the drawing Fig. 2 stands.
  • the drive shaft 2 with the at least one cam 3 has a shaft rolling surface 4 and the roller 10 has a roller rolling surface 11.
  • FIG. 6 An axial direction 40 is aligned parallel to the longitudinal axis 17 and a radial direction 41 is perpendicular to the longitudinal axis 17 of the cylinder 6
  • a radial direction 41 is perpendicular to the longitudinal axis 17 of the cylinder 6
  • FIG. 6 the cylinder 6 is shown in a very simplified manner without a distinction between the cylinder head 14 and the bearing cylinder 15.
  • one end region of the cylinder 6 has an external thread 47 and a union nut 45 with an internal thread 46 is screwed onto the external thread 47.
  • the union nut 45 also forms a ring 44.
  • the in Fig. 6 The illustrated lower end area of the union nut 45 has a greater radial distance from the longitudinal axis 17 than the cylinder 6 in this area, so that a in Fig.
  • the illustrated lower axial end of the union nut 45 forms an axial stop 43 for the cover cap 8.
  • the axial stop 43 or the lower end region of the union nut 45 as shown in FIG Fig. 6 thus forms a projection 16 with respect to the cylinder 6 and also an undercut 42 running completely around the circumference.
  • the cover cap 8 has an edge 49 at the opening 48.
  • the electrical connector 52 is already finally fastened to the cylinder 6.
  • the electrical connector 52 is first inserted into the opening 48 of the cap 8 ( Fig. 7 ) and then the cover cap 8 is placed on an upper end of the union nut 45 in the area of the opening 48 or in the area of the edge 49.
  • the edge 49 of the cover cap 8 is thus elastically pretensioned.
  • the covering cap 8 is continued by the tool 56 as shown in FIG Fig. 6 , 9 and 10 Moved in a downward direction towards the fuel nozzle 54 until the edge 49 of the cap 8 has passed over the union nut 45, so that an elastic recovery of the cap 8 occurs at the edge 49 and the diameter of the opening 48 of the cap 8 increases is reduced again due to the elastic recovery in the radial direction 41.
  • the cover cap 8 is already attached to the high-pressure pump 1, so that the edge 49 rests on the axial stop 43 of the union nut 45 due to the elastic return deformation of the edge 49 of the cover cap 8.
  • the cover cap 8 is reliably attached to the rest of the high-pressure pump 1 in a form-fitting manner.
  • the geometry of the axial support section 51 is designed in such a way that the axial support section 51, after being fastened in the position in FIG Fig. 6 and 10 rests on the cylinder 6 with an elastic bias.
  • the cover cap 8 is additionally attached to the rest of the high-pressure pump 1 in a force-locking manner.
  • FIG. 11 a further, second embodiment of the attached cover cap 8 is shown.
  • the cover cap 8 also covers the union nut 45.
  • the high-pressure injection system 36 for a motor vehicle 38 is shown in a highly schematic representation with a high-pressure rail 30 or a fuel rail 31.
  • the fuel is injected from the high-pressure rail 30 into the combustion chamber of the internal combustion engine 39 by means of valves (not shown).
  • a prefeed pump 35 conveys fuel from a fuel tank 32 through a fuel line 33 to the high pressure pump 1 according to the above exemplary embodiment.
  • the prefeed pump 35 can also be driven by an electric motor (not shown) without a mechanical coupling (not shown) to the drive shaft 2.
  • the high pressure pump 1 and the prefeed pump 35 are driven by the drive shaft 2.
  • the drive shaft 2 is coupled to a crankshaft of the internal combustion engine 39.
  • the high pressure rail 30 serves to inject the fuel into the combustion chamber of the internal combustion engine 39.
  • the fuel delivered by the prefeed pump 35 is conducted to the high-pressure pump 1 through the fuel line 33.
  • the fuel not required by the high-pressure pump 1 is returned to the fuel tank 32 through a fuel return line 34.
  • a metering unit 37 controls and / or regulates the amount of fuel fed to the high-pressure pump 1, so that in a further embodiment the fuel return line 34 can be dispensed with (not shown).
  • the high-pressure pump 1 according to the invention and the high-pressure injection system 36 according to the invention are associated with considerable advantages.
  • the cover cap 8 is formed from an elastic plastic.
  • the cover cap 8 can advantageously adapt to different geometries, in particular also during assembly. This enables the cover cap 8 to be installed after the electrical connector 52 has been attached to the high-pressure pump 1, since when the electrical connector 52 is passed through the opening 48 of the cover cap 8, due to the geometry of the high-pressure pump 1 including the electrical connector 52, an elastic deformation of the cover cap 8 occurs necessary is.
  • cover cap 8 Due to these elastic properties of the cover cap 8, it can also enable a sealing function with respect to the cylinder 6, in particular with an additional optional pretensioning of the cover cap 8 after fastening, so that the cover cap 8 at least on partial surfaces between the cover cap 8 and the rest of the high-pressure pump 1 under an elastic Preload rests on the rest of the high pressure pump 1 and this enables a sealing function. In this way, penetration of moisture and water into the area between the cover cap 8 and the rest of the high-pressure pump 1 can be avoided in an advantageous manner.

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

Claims (15)

  1. Pompe à haute pression (1), en particulier pour un véhicule automobile (38), servant à refouler un fluide, en particulier du carburant, par exemple du carburant diesel, comportant
    un arbre d'entraînement (2) doté d'au moins une came (3), au moins un piston (5),
    au moins un cylindre (6) pour supporter l'au moins un piston (5),
    l'au moins un piston (5) s'appuyant sur l'arbre d'entraînement (2) par l'au moins une came (3), de sorte qu'un mouvement de translation puisse être effectué par l'au moins un piston (5) sur la base d'un mouvement de rotation de l'arbre d'entraînement (2),
    au moins un capuchon de recouvrement (8), lequel est fixé indirectement au cylindre (6) du côté extérieur, caractérisée en ce
    qu'une extrémité (18) de l'au moins un capuchon de recouvrement (8) repose sur une saillie (16) du reste de la pompe à haute pression (1) pour la fixation par complémentarité de forme et à force de l'extrémité (18) du capuchon de recouvrement (8) sur la saillie (16), l'au moins un capuchon de recouvrement (8) reposant sur le reste de la pompe à haute pression (1) avec une force de précontrainte élastique.
  2. Pompe à haute pression selon la revendication 1,
    caractérisée en ce que
    la saillie (16) est réalisée sur la pompe à haute pression (1) du côté extérieur
    et/ou
    la saillie (16) est réalisée sous la forme d'une contre-dépouille (42)
    et/ou
    la saillie (16) est réalisée dans la direction radiale (41) par rapport à un axe longitudinal (17) du cylindre (6) et l'extrémité (18) de l'au moins un capuchon de recouvrement (8) repose sur une butée axiale (43) de la saillie (16).
  3. Pompe à haute pression selon la revendication 1 ou 2,
    caractérisée en ce que
    la saillie (16) est réalisée dans la direction périphérique ou dans la direction tangentielle par rapport à un axe longitudinal (17) du cylindre (6) et/ou
    la saillie (16) est formée par une bague (44) ou un écrou (45), en particulier un écrou chapeau (45), sur le cylindre (6).
  4. Pompe à haute pression selon l'une ou plusieurs des revendications précédentes,
    caractérisée en ce que
    l'au moins un capuchon de recouvrement (8) comprend une ouverture (48) sensiblement centrale.
  5. Pompe à haute pression selon l'une ou plusieurs des revendications précédentes,
    caractérisée en ce que
    l'au moins un capuchon de recouvrement (8) comprend une partie d'appui (50) réalisée sensiblement radialement et une partie d'appui (51) réalisée sensiblement axialement.
  6. Pompe à haute pression selon la revendication 5,
    caractérisée en ce que
    l'ouverture (48) est réalisée sur la partie d'appui radiale (50).
  7. Pompe à haute pression selon l'une ou plusieurs des revendications 4 à 6,
    caractérisée en ce que
    l'extrémité (18) de l'au moins un capuchon de recouvrement (8) qui repose sur la saillie (16) du reste de la pompe à haute pression (1) est un bord (49) de l'ouverture (48).
  8. Pompe à haute pression selon l'une ou plusieurs des revendications 4 à 7,
    caractérisée en ce
    qu'un connecteur électrique (52) est disposé dans l'ouverture (48).
  9. Pompe à haute pression selon l'une ou plusieurs des revendications précédentes,
    caractérisée en ce
    qu'un évidement (55) pour un goulot de remplissage de carburant (54) est réalisé sur l'au moins un capuchon de recouvrement (8), en particulier sur la partie d'appui axiale (51),
    et/ou
    le cylindre (8) comporte une tête de cylindre (14) et/ou un cylindre de support (15).
  10. Pompe à haute pression selon l'une ou plusieurs des revendications précédentes,
    caractérisée en ce que
    l'au moins un capuchon de recouvrement (8) est réalisé au moins partiellement, en particulier entièrement, à partir d'une matière synthétique élastique, de préférence un élastomère thermoplastique,
    et/ou
    l'au moins un capuchon de recouvrement (8) est réalisé au moins partiellement, en particulier entièrement, à partir d'une matière présentant un module d'élasticité inférieur à 5,1 ou 0,2 kN/mm2.
  11. Procédé de fabrication d'une pompe à haute pression (1), en particulier d'une pompe à haute pression (1) selon l'une ou plusieurs des revendications précédentes, comportant les étapes de :
    fourniture d'un arbre d'entraînement (2) doté d'au moins une came (3),
    fourniture d'au moins un piston (5),
    fourniture d'au moins un cylindre (6) pour supporter l'au moins un piston (5),
    fourniture d'au moins un capuchon de recouvrement (8), montage de l'au moins un arbre d'entraînement (2), de l'au moins un piston (5), de l'au moins un cylindre (6), de sorte que l'au moins un piston (5) s'appuie sur l'arbre d'entraînement (2) par l'au moins une came (3) et qu'un mouvement de translation puisse être effectué par l'au moins un piston (5) sur la base d'un mouvement de rotation de l'arbre d'entraînement (2),
    fixation de l'au moins un capuchon de recouvrement (8) indirectement sur le cylindre (6) du côté extérieur,
    caractérisé en ce que
    le capuchon de recouvrement (8) est, pour la fixation, tout d'abord étiré puis une recouvrance élastique est effectuée, de sorte que, du fait de la recouvrance élastique, une extrémité (18) de l'au moins un capuchon de recouvrement (8) repose sur la saillie (16) du reste de la pompe à haute pression (1) et l'au moins un capuchon de recouvrement (8) est ainsi fixé sur la saillie (16) par complémentarité de forme et à force.
  12. Procédé selon la revendication 11,
    caractérisé en ce que
    tout d'abord un connecteur électrique (52) est monté puis l'au moins un capuchon de recouvrement (8) est fixé et/ou
    l'au moins un capuchon de recouvrement (8) est étiré dans la direction radiale (41) par rapport à l'axe longitudinal (17) du cylindre (6) et effectue une recouvrance élastique.
  13. Procédé selon la revendication 11 ou 12, caractérisé en ce que
    l'au moins un capuchon de recouvrement (8) est étiré sensiblement au niveau d'un bord (49) d'une ouverture (48) en tant qu'extrémité (18) de l'au moins un capuchon de recouvrement (8), de sorte que la taille de l'ouverture (48) soit agrandie par l'étirement puis la recouvrance élastique est effectuée sensiblement au niveau du bord (49) de l'ouverture (48)
    et/ou
    le connecteur électrique (52) déjà monté est tout d'abord guidé à travers l'ouverture (48) de l'au moins un capuchon de recouvrement (8) puis l'étirement élastique de l'au moins un capuchon de recouvrement (8) est effectué
    et/ou
    le capuchon de recouvrement (8), en particulier une partie d'appui axiale (51), est étiré, en particulier est étiré dans la direction radiale (41), puis le capuchon de recouvrement (8), en particulier la partie d'appui axiale (51), est fixé sur le reste de la pompe à haute pression (1) avec une précontrainte élastique.
  14. Procédé selon l'une ou plusieurs des revendications 11 à 13,
    caractérisé en ce que
    l'au moins un capuchon de recouvrement (8) est étiré, par le fait que le capuchon de recouvrement (8) est enfilé du côté extérieur dans la direction axiale (40) sur la pompe à haute pression (1) puis, du fait de la géométrie extérieure de la pompe à haute pression (1), le mouvement axial de l'au moins un capuchon de recouvrement (8) provoque l'étirement en particulier radial de l'au moins un capuchon de recouvrement (8).
  15. Système d'injection haute pression (36) pour un moteur à combustion interne (39), en particulier pour un véhicule automobile (38), comportant
    une pompe à haute pression (1),
    un rail haute pression (30),
    de préférence une pompe de pré-refoulement (35) pour le refoulement de carburant à partir d'un réservoir de carburant (32) jusqu'à la pompe à haute pression (1), caractérisé en ce que
    la pompe à haute pression (1) est réalisée sous forme de pompe à haute pression (1) selon l'une ou plusieurs des revendications 1 à 10.
EP16763546.5A 2015-10-26 2016-09-13 Pompe à haute pression Active EP3368764B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015220870.2A DE102015220870A1 (de) 2015-10-26 2015-10-26 Hochdruckpumpe
PCT/EP2016/071565 WO2017071867A1 (fr) 2015-10-26 2016-09-13 Pompe à haute pression

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Publication Number Publication Date
EP3368764A1 EP3368764A1 (fr) 2018-09-05
EP3368764B1 true EP3368764B1 (fr) 2021-02-17

Family

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EP16763546.5A Active EP3368764B1 (fr) 2015-10-26 2016-09-13 Pompe à haute pression

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US (1) US10851749B2 (fr)
EP (1) EP3368764B1 (fr)
CN (1) CN108291517B (fr)
DE (1) DE102015220870A1 (fr)
WO (1) WO2017071867A1 (fr)

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DE102021004283A1 (de) 2021-08-21 2023-02-23 Kastriot Merlaku Hochdruckpumpe

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DE102015221056A1 (de) * 2015-10-28 2017-05-04 Robert Bosch Gmbh Kraftstoffhochdruckpumpe
CN114483399B (zh) * 2022-02-22 2023-03-28 安徽江淮汽车集团股份有限公司 一种柴油机高压油泵保护罩盖

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Publication number Priority date Publication date Assignee Title
DE10345725B4 (de) * 2003-10-01 2017-01-05 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe
DE10356262A1 (de) 2003-12-03 2005-06-30 Robert Bosch Gmbh Radialkolbenpumpe, insbesondere für Kraftstoffeinspritzsysteme
DE102006045933A1 (de) 2006-09-28 2008-04-03 Robert Bosch Gmbh Stößelbaugruppe für eine Hochdruckpumpe und Hochdruckpumpe mit wenigstens einer Stößelbaugruppe
WO2013080253A1 (fr) 2011-11-30 2013-06-06 日立オートモティブシステムズ株式会社 Pompe d'alimentation en combustible à haute pression
DE102012208189A1 (de) 2012-05-16 2013-11-21 Robert Bosch Gmbh Hochdruckpumpe
DE102013206930A1 (de) * 2013-04-17 2014-10-23 Robert Bosch Gmbh Kolbenpumpe, insbesondere Kraftstoff-Hochdruckpumpe
JP5979092B2 (ja) * 2013-07-23 2016-08-24 トヨタ自動車株式会社 パルセーションダンパおよび高圧燃料ポンプ
GB201313338D0 (en) * 2013-07-26 2013-09-11 Delphi Tech Holding Sarl High Pressure Pump
DE102013218260A1 (de) * 2013-09-12 2015-03-12 Continental Automotive Gmbh Rollenstößel
DE102015221056A1 (de) * 2015-10-28 2017-05-04 Robert Bosch Gmbh Kraftstoffhochdruckpumpe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021004283A1 (de) 2021-08-21 2023-02-23 Kastriot Merlaku Hochdruckpumpe

Also Published As

Publication number Publication date
CN108291517A (zh) 2018-07-17
US20180363609A1 (en) 2018-12-20
US10851749B2 (en) 2020-12-01
EP3368764A1 (fr) 2018-09-05
CN108291517B (zh) 2020-08-04
WO2017071867A1 (fr) 2017-05-04
DE102015220870A1 (de) 2017-04-27

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