WO2019206491A1 - Dispositif d'étanchéité pour pompe à carburant haute pression dotée d'un piston - Google Patents

Dispositif d'étanchéité pour pompe à carburant haute pression dotée d'un piston Download PDF

Info

Publication number
WO2019206491A1
WO2019206491A1 PCT/EP2019/053934 EP2019053934W WO2019206491A1 WO 2019206491 A1 WO2019206491 A1 WO 2019206491A1 EP 2019053934 W EP2019053934 W EP 2019053934W WO 2019206491 A1 WO2019206491 A1 WO 2019206491A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
sealing
sealing device
fuel pump
pressure fuel
Prior art date
Application number
PCT/EP2019/053934
Other languages
German (de)
English (en)
Inventor
Patrick Hallas
Anja KEETMAN
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 WO2019206491A1 publication Critical patent/WO2019206491A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/442—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 means preventing fuel leakage around pump plunger, e.g. fluid barriers
    • 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
    • F02M59/44—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
    • F02M59/445—Selection of particular materials
    • 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
    • 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
    • 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
    • F04B1/0443—Draining of the housing; Arrangements for handling leaked fluids
    • 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
    • F04B1/0448—Sealing means, e.g. for shafts or housings
    • 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
    • F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • F04B1/0531—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders with cam-actuated distribution members
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
    • F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
    • 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
    • F04B53/02—Packing the free space between cylinders and pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8046—Fuel injection apparatus manufacture, repair or assembly the manufacture involving injection moulding, e.g. of plastic or metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation

Definitions

  • sealing devices for high-pressure fuel pumps with a piston, at its end facing a drive the sealing means the piston radially enclosing providable so that the piston along its longitudinal axis relative to the sealing device is displaceable, wherein the sealing means at least one radially inside circumferential sealing portion has known.
  • the density devices are made wholly or partly by machining, according to the prior art, this is done at room temperature.
  • the invention is based on the recognition that a machining at room temperature, ie at 20 ° C, is not optimal in terms of the properties of the product produced.
  • Sealing devices have, in particular, a more closed surface, a smaller roughness depth and have lower dimensional variations among one another.
  • the sealing devices produced in this way are less prone to wear and tear, especially during the initial installation of the seal.
  • the reason for the better dimensional accuracy of the sealing devices produced is to be considered that the hardness of the sealing device below the
  • Room temperature is greater, so that it comes to a lesser extent by the machining to elastic and / or plastic deformation of the sealing device.
  • a sealing device according to the invention and the high-pressure fuel pump according to the invention have improved tightness.
  • the machining does not take place below the
  • Figure 1 is a simplified schematic representation of a fuel system for an internal combustion engine
  • FIG. 3 shows a detail of Figure 2 in an enlarged view
  • FIG. 4 shows an axial sectional view of a sealing device for a piston of the high-pressure fuel pump
  • FIG. 5 shows a flow chart for a method for producing the
  • FIG. 1 shows a fuel system 10 for a further not shown
  • Fuel is supplied from a fuel tank 12 via a suction line 14, by means of a prefeed pump 16, via a low-pressure line 18, via an inlet 20 of a quantity control valve 24 which can be actuated by an electromagnetic actuating device 22 to a delivery chamber 26 of a high-pressure fuel pump 28.
  • the quantity control valve 24 may be a forcibly opening inlet valve of the high-pressure fuel pump 28.
  • the high-pressure fuel pump 28 is designed as a piston pump, wherein a piston 30 can be moved vertically by means of a cam disk 32 ("drive") in the drawing. Hydraulically between the delivery chamber 26 and an outlet 36 of the high-pressure fuel pump 28, a drawn in the figure 1 as a spring-loaded check valve outlet valve 40 is arranged, which can open to the outlet 36 out.
  • the outlet 36 is at a
  • High-pressure line 44 and connected via this to a high-pressure accumulator 46 ("common rail"). Furthermore, a likewise drawn as a spring-loaded check valve pressure relief valve 42 is arranged hydraulically between the outlet 36 and the delivery chamber 26, which can open to the delivery chamber 26 through.
  • the prefeed pump 16 delivers fuel from the fuel tank 12 into the low pressure line 18.
  • the quantity control valve 24 may be closed and opened in response to a respective demand for fuel. As a result, the amount of fuel delivered to the high-pressure accumulator 46 is influenced.
  • the electromagnetic actuator 22 is controlled by a control and / or regulating device 48.
  • FIG. 2 shows the high-pressure fuel pump 28 of FIG. 1 in an axial sectional representation.
  • the high-pressure fuel pump 28 comprises a housing 50, which by means of a flange 52 on an engine block 53 of the
  • the housing 50 also has several hydraulic channels 54, 55, 56 and 58 on.
  • the high-pressure fuel pump 28 comprises a cover 60 and a cover
  • the high-pressure fuel pump 28 is at least partially rotationally symmetrical to a longitudinal axis 64 executed.
  • the high-pressure fuel pump 28 has the outlet 36 for connection to the high-pressure line 44. Hydraulically connected to the outlet 36, the outlet valve 40 (in a left-hand portion in the drawing) and the pressure-limiting valve 42 (in a middle portion) are disposed in the housing 50. In a middle right section of the housing 50 in the drawing, the quantity control valve 24 is arranged.
  • the high-pressure fuel pump 28 includes: the delivery chamber 26, the piston 30 and a bushing 66. The along the longitudinal axis 64th
  • slidable piston 30 is designed as a so-called "stepped piston” and has essentially two sections. A first section (in the drawing above) with a comparatively large diameter, by means of which it is guided in the bushing 66, and a second section (in the drawing below) with a comparatively small diameter.
  • FIG. 2 A lower region of FIG. 2 is identified by a frame III and shown enlarged in FIG.
  • Figure 3 shows a roughly cup-shaped seal carrier 68, as well as a radially outwardly disposed about a portion of the seal carrier 68 and designed as a helical spring piston spring 70 which extends with an end portion on the
  • Seal carrier 68 is supported, which is why this is also referred to as "spring recording". At one in the drawing lower and the drive
  • a spring plate 72 is pressed, to which an end portion of the piston spring 70 is received.
  • a piston seal (also referred to as a "low-pressure seal"), referred to as a sealing device 74, which radially surrounds the lower second section (which faces the drive) of the piston 30 and which exists between the housing 50 and the seal carrier 68 Fluid space (“step room”) seals to the outside to the engine block 53 out.
  • the piston 30 is displaceable along the longitudinal axis 64 relative to the sealing device 74.
  • the sealing device 74 has an overall annular structure.
  • the sealing device 74 in FIG. 2 is supported axially upwardly by a holding section 76 which is arranged inside the seal carrier 68 and which likewise has an approximately hat-shaped design.
  • the sealing device 74 in FIG. 2 is supported axially downward by a peripheral edge portion of the seal carrier 68 bent radially inwards. It is understood that the sealing device 74 may optionally have a slight axial play within a region defined by the holding section 76 and the said edge section.
  • the sealing device 74 is arranged along the longitudinal axis 64 radially outward on the piston 30.
  • the sealing device 74 is designed substantially rotationally symmetrical, wherein in the drawing, upper and lower portions of the sealing device 74 in this example are mutually axially mirror-symmetrical. Nevertheless, asymmetrical designs are possible and even advantageous if necessary.
  • the sealing device 74 comprises in this example a machined post-processed injection molded part 77. This preferably comprises an elastic material, preferably a perfluoroalkoxy material ("PFA”), or is made of this, and is by means of a
  • PFA perfluoroalkoxy material
  • an axial distance 80 of the sealing portions 78 corresponds to at least one stroke of the piston 30.
  • the sealing portions 78, the fuel (in the drawing above the sealing device 74) and the oil (in the drawing below the sealing device 74) particularly good "strip" and thus prevent mixing of the fuel with the oil or at least minimize.
  • Figure 4 shows the sealing device 74 in a further enlarged
  • the sealing device 74 is present as an unassembled item, that is, it is not deformed in the present case by the piston 30 or the seal carrier 68.
  • the sealing device 74 is at least in
  • the sealing device 74 is mirror-symmetrical to a transverse plane 89 (horizontal in the drawing and perpendicular to the longitudinal axis 64).
  • Sealing means 74 at radially opposite axial end portions remote from each other a circumferential sealing bead 82.
  • the sealing means 74 against a radially inner portion of the seal carrier 68 "static" seal.
  • the sealing device 74 is arranged non-positively in the seal carrier 68.
  • radially encircling and so far annular springs 84 are added to mutually remote axial end portions of the sealing device 74, each consisting of a
  • Federblech are made and formed in the sectional plane of Figure 4 in approximately U-shaped.
  • the springs 84 are open in the figure 4 each up or down.
  • the sealing device 74 Radially inwardly about the longitudinal axis 64, the sealing device 74 has a rotationally symmetrical centric recess 86 in the manner of a
  • the recess 86 comprises two (outer) first axial portions 86a, then two (each "middle") second axial portions 86b and then two (each inner) third axial portions 86c. Axially centered between the third axial portions 86c is a single fourth axial portion 86d.
  • the first, second and third axial portions 86a, 86b and 86c, and the fourth axial portion 86d each have respective radially inner first, second, third and fourth
  • Wall sections 88a, 88b, 88c and 88d are 88a, 88b, 88c and 88d.
  • a radially inner contour of the recess 86 formed by the first, second and third wall sections 88a, 88b and 88c is in each case conical.
  • the first axial portions 86a each open axially outward.
  • the second and third axial sections 86b and 86c respectively open axially inwards, ie towards the transverse plane 89.
  • the axially inner fourth wall portion 88d is parallel to the longitudinal axis 64, that is cylindrical.
  • the cone-shaped first wall sections 88a each have, with respect to a plane perpendicular to the longitudinal axis 64, an angle a of from approximately 30 degrees to approximately 60 degrees.
  • the cone-shaped second wall sections 88b each have an angle ⁇ with respect to the longitudinal axis 64. In this case, the angle ⁇ is preferably (but not necessarily) approximately half the size of the angle a.
  • the cone-shaped third wall sections 88c each have an angle g (not shown in the drawing) with respect to the longitudinal axis 64, wherein the angle g is preferably smaller than the angle ⁇ .
  • the sealing device 74 shown has only one sealing lip per sealing section 78.
  • more than one sealing lip per sealing section 78 may also be provided, for example as is already known in principle from WO 02/008061581 A1 or from WO2016 / 083587 A1.
  • FIG. 5 shows a flow chart for a method for producing the
  • Sealing means 74 of the high-pressure fuel pump 28 according to the figures 2 to 5.
  • a start block 100 the procedure shown begins.
  • the sealing device 74 is injection-molded into an initial shape.
  • an axially central bore is drilled in the initial shape.
  • the sealing means 74 is made of PTFE with a proportion of
  • the sealing device 74 is made of PFA with a
  • Proportion of carbon fibers which is 15% by weight.
  • the cutting takes place at -5 ° C.
  • Manufacture of the sealing device 74 comprises that produced in block 102
  • the material of the sealing device 74 and the temperature at which the machining takes place are as indicated in the preceding examples.

Landscapes

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

Abstract

L'invention concerne un procédé de fabrication d'un dispositif d'étanchéité (74) destiné à une pompe à carburant haute pression (28) dotée d'un piston (30) à la section d'extrémité orientée entraînement duquel le dispositif d'étanchéité peut être mis en place de façon à entourer le piston (30) radialement de sorte que le piston (30) peut coulisser sur son axe longitudinal (64) par rapport au dispositif d'étanchéité (74), le dispositif d'étanchéité (74) présentant au moins une section d'étanchéité (78) qui s'étend en circonférence radialement à l'intérieur. Selon l'invention, la section d'étanchéité (78) est réalisée par un usinage à une température inférieure à la température ambiante.
PCT/EP2019/053934 2018-04-24 2019-02-18 Dispositif d'étanchéité pour pompe à carburant haute pression dotée d'un piston WO2019206491A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018206312.5 2018-04-24
DE102018206312.5A DE102018206312A1 (de) 2018-04-24 2018-04-24 Dichteinrichtung für eine Kraftstoff-Hochdruckpumpe mit einem Kolben

Publications (1)

Publication Number Publication Date
WO2019206491A1 true WO2019206491A1 (fr) 2019-10-31

Family

ID=62716736

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/053934 WO2019206491A1 (fr) 2018-04-24 2019-02-18 Dispositif d'étanchéité pour pompe à carburant haute pression dotée d'un piston

Country Status (2)

Country Link
DE (1) DE102018206312A1 (fr)
WO (1) WO2019206491A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020214632A1 (de) * 2020-11-20 2022-05-25 Robert Bosch Gesellschaft mit beschränkter Haftung Kolbenpumpe, insbesondere Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093443A (en) * 1961-03-13 1963-06-11 Felt Products Mfg Co Process for producing a vulcanized rubber gasket
WO2008061581A1 (fr) 2006-11-23 2008-05-29 Elringklinger Ag Système d'étanchéité
WO2009114659A1 (fr) * 2008-03-13 2009-09-17 Vetco Gray, Inc. Système, procédé et appareil pour étanchéifier des matériaux ayant une faible température de transition vitreuse pour des applications d'étanchéification à performance élevée
JP2009216168A (ja) * 2008-03-10 2009-09-24 Nok Corp 密封装置及び密封装置の製造方法
WO2016083587A1 (fr) 2014-11-28 2016-06-02 Elringklinger Ag Élément d'étanchéité et son procédé de fabrication
DE102014225319A1 (de) 2014-12-09 2016-06-09 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe mit einem Kolben

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093443A (en) * 1961-03-13 1963-06-11 Felt Products Mfg Co Process for producing a vulcanized rubber gasket
WO2008061581A1 (fr) 2006-11-23 2008-05-29 Elringklinger Ag Système d'étanchéité
JP2009216168A (ja) * 2008-03-10 2009-09-24 Nok Corp 密封装置及び密封装置の製造方法
WO2009114659A1 (fr) * 2008-03-13 2009-09-17 Vetco Gray, Inc. Système, procédé et appareil pour étanchéifier des matériaux ayant une faible température de transition vitreuse pour des applications d'étanchéification à performance élevée
WO2016083587A1 (fr) 2014-11-28 2016-06-02 Elringklinger Ag Élément d'étanchéité et son procédé de fabrication
DE102014225319A1 (de) 2014-12-09 2016-06-09 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe mit einem Kolben

Also Published As

Publication number Publication date
DE102018206312A1 (de) 2018-07-19

Similar Documents

Publication Publication Date Title
EP3230579B1 (fr) Pompe à carburant haute pression munie d'un piston
EP0991867B1 (fr) Soupape hydraulique, notamment pour assurer la commande d'un deplacement d'arbre a cames dans une automobile
EP1579137B1 (fr) Soupape pour la regulation d'un fluide
EP3108136B1 (fr) Pompe à essence à piston pour moteur à combustion interne
DE102005006818A1 (de) Dichtungseinrichtung für einen Kraftstoffinjektor sowie Verfahren zum Abdichten
EP3108138B1 (fr) Pompe à carburant à piston pour moteur à combustion interne
EP2989316B1 (fr) Pompe à piston, en particulier pompe à haute pression pour un système de carburant pour un moteur à combustion interne
DE602005005242T2 (de) Längen-Ausgleichselement und dieses enthaltendes Kraftstoff-Einspritzventil
DE102019208445A1 (de) Kraftstoff-Hochdruckpumpe
WO1996030648A1 (fr) Pompe a piston
WO2019206491A1 (fr) Dispositif d'étanchéité pour pompe à carburant haute pression dotée d'un piston
WO2014198442A1 (fr) Pompe à carburant haute pression pour circuit de carburant destiné à moteur à combustion interne
DE102018120265A1 (de) Stößel für eine Kraftstoffpumpe oder für einen Ventiltrieb
DE102007011047A1 (de) Magnetventilinjektor
DE102014213751A1 (de) Ventilbaugruppe
DE2936332A1 (de) Kraftstoffeinspritzventil und verfahren zur herstellung eines kraftstoffeinspritzventiles
DE102008042650A1 (de) Radialkolbenpumpe zur Versorgung einer Verbrennungskraftmaschine mit Kraftstoff
DE10059954B4 (de) Rückschlagventil
DE102014211609A1 (de) Kraftstoff-Hochdruckpumpe mit einem Kolben
EP1740822B1 (fr) Injecteur common rail
WO2017050463A1 (fr) Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission
DE102022134801A1 (de) Restdruckhalteventil für eine Gasdruckfeder
DE102013225771A1 (de) Verfahren zur Herstellung eines elektromagnetisch betätigbaren Ventils
WO2018054415A1 (fr) Élément de commutation hydraulique
DE102017201803A1 (de) Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil

Legal Events

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

Ref document number: 19706524

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19706524

Country of ref document: EP

Kind code of ref document: A1