WO2019211021A1 - Équipement de soupape pour une pompe à haute pression - Google Patents

Équipement de soupape pour une pompe à haute pression Download PDF

Info

Publication number
WO2019211021A1
WO2019211021A1 PCT/EP2019/054174 EP2019054174W WO2019211021A1 WO 2019211021 A1 WO2019211021 A1 WO 2019211021A1 EP 2019054174 W EP2019054174 W EP 2019054174W WO 2019211021 A1 WO2019211021 A1 WO 2019211021A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
pressure pump
valve body
valve device
housing
Prior art date
Application number
PCT/EP2019/054174
Other languages
German (de)
English (en)
Inventor
Jan Herrmann
Pablo Antonio NAPAL JIMENEZ
Sebastian Vietze
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 WO2019211021A1 publication Critical patent/WO2019211021A1/fr

Links

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
    • 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
    • F04B53/1087—Valve seats
    • 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
    • F02M59/46—Valves
    • 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
    • F04B1/0452—Distribution members, e.g. valves
    • 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

Definitions

  • the invention relates to a valve device, and a high-pressure pump and manufacturing method for producing the valve device and the
  • Valve devices for example exhaust valves of a high-pressure pump of a fuel system of an internal combustion engine, are known from the market. Frequently, such valve devices have a valve body pressed into a housing and a movable valve element which rests against a flat sealing seat of the valve body when the valve device is closed with a planar sealing section.
  • the present invention is based on the recognition that, in the closed state with a planar sealing section of the valve element on a flat sealing seat of the valve body, there are adhesion forces which depend strongly on the size of the surface with which the sealing section of the valve element comes to rest on the sealing seat of the valve body. These adhesive effects delay the opening of the valve.
  • valves are used as outlet valves in high-pressure pumps, pressure peaks occur in the delivery chamber of the pump and the opening of the valve takes place very abruptly in connection, which in addition to a reduced
  • the sealing portion is formed as a flat surface and the sealing seat is formed as a conical annular surface, so that the sealing portion rests with closed valve means along a ring line on the sealing seat.
  • valve devices according to the invention and the high-pressure pumps according to the invention work quieter and more efficiently than conventional valve devices and high-pressure pumps.
  • an object along a ring line is understood as a component which can come between a flat surface and a surface having the shape of a ring cone. If, as a result of the concern, an elastic - but not plastic - deformation of the annular conical surface and / or the flat surface is concerned, the abutment is still considered to be linear, even if the width of the contact line thereby temporarily assumes a value other than zero ,
  • the sealing seat and the sealing portion enclose with one another an angle a which is greater than 0.05 ° and / or which is smaller than 2 °.
  • High-pressure pumps according to the invention have a valve device of the type described.
  • the valve body can in particular be pressed directly or indirectly into the housing of the high-pressure pump.
  • the invention also includes a manufacturing method for producing the
  • valve device It provides that the valve body initially has a flat sealing seat surface, which can be accomplished with little effort and very high precision. It is further contemplated that the valve body is pressed into the housing, wherein the formerly flat sealing seat surface passes through the acting from outside to inside pressure in the valve body into a conical annular surface. The result is a precise and easy to produce sealing seat surface with the desired geometry.
  • the solution according to the invention also has the advantage that a very low roughness of the sealing surfaces can be achieved.
  • the pressing of the valve body into the housing takes place with a radial excess of not less than 0.32%.
  • a valve body would be introduced, which (unpressed and at the same temperature) has a diameter of not less than 12.038 mm. This excess, which exceeds the previously known, ensures that the desired deformation of the valve body occurs.
  • Figure 1 is a simplified schematic of a fuel system with a
  • Figure 2 is a simplified sectional view of an embodiment of
  • FIG. 3 shows a detailed view of the area designated III in FIG.
  • FIG. 1 shows a fuel system 10 of an internal combustion engine in a greatly simplified representation. 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, and via an inlet valve 20 to a delivery chamber 23 of a high-pressure pump 24.
  • the intake valve 20 is, for example, a quantity control valve and actuated by an electromagnet.
  • an electromagnet a piezoactuator or a hydraulic actuator can also be used, for example.
  • the high-pressure pump 24 has an outlet valve, which is designed in the form of a valve device 22 described in more detail below.
  • the valve device 22 communicates via a high-pressure line 26 with a high-pressure accumulator 28.
  • the prefeed pump 16 delivers fuel from the fuel tank 12 into the low-pressure line 18
  • valve device 22 The function of the valve device 22 is to open in a delivery phase of the high-pressure pump 24 to a fluid connection between the
  • High-pressure accumulator 28 can be filled with pressurized fluid.
  • the valve device 22 closes in order to prevent undesired reflux of fluid from the high-pressure accumulator 28 into the delivery chamber 23.
  • FIGS. 2 and 3 show an embodiment of the valve device 22 and the high-pressure pump 24 according to FIG. 1 in a simplified form
  • Valve device 22 are substantially rotationally symmetrical about a longitudinal axis 29 and comprise a housing 30 of the high-pressure pump 24, a pressed into the housing 30 valve body 60 with a sealing seat 32, against which a sealing portion 34 of a valve element 36 with closed valve device 22.
  • the valve device 22 has, upstream of the sealing seat 32, a flow channel 38 extending parallel to the longitudinal axis 29.
  • the sealing portion 34 is formed as a flat surface and the sealing seat 32 is formed as a conical annular surface, so that the sealing portion 34 rests with closed valve device 22 along a ring line 65 on the sealing seat 32.
  • the sealing seat 32 and the sealing portion 34 close in the example an angle a with each other, which is 1 °.
  • valve device 22 and the high-pressure pump 24 shown in FIG. 2 are produced in that the valve body 60 initially has a flat sealing seat surface 32, which after pressing the valve body 60 into the housing 30 of FIG
  • High pressure pump 28 merges into a conical annular surface.
  • the pressing is done in this example with an excess of 0.32%.
  • Both the housing 30 and the valve body 60 are made of stainless steel in the example.

Landscapes

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

Abstract

L'invention concerne un équipement de soupape pour une pompe à haute pression (24), pourvu d'un corps (60) de soupape inséré par pression dans un boîtier (30), d'un élément (36) de soupape mobile qui repose avec une section étanche (34) contre un siège d'étanchéité (32) du corps (60) de soupape lorsque l'équipement de soupape (22) est fermé, caractérisé en ce que la section étanche (34) est conçue sous forme d'une surface plane et que le siège d'étanchéité (32) est conçu sous forme d'une surface annulaire conique, de sorte que la section étanche (34) repose contre le siège d'étanchéité (32) le long d'une ligne annulaire (65) lorsque l'équipement de soupape est fermé (22).
PCT/EP2019/054174 2018-05-02 2019-02-20 Équipement de soupape pour une pompe à haute pression WO2019211021A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018206763.5 2018-05-02
DE102018206763.5A DE102018206763A1 (de) 2018-05-02 2018-05-02 Ventileinrichtung für eine Hochdruckpumpe

Publications (1)

Publication Number Publication Date
WO2019211021A1 true WO2019211021A1 (fr) 2019-11-07

Family

ID=65529681

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/054174 WO2019211021A1 (fr) 2018-05-02 2019-02-20 Équipement de soupape pour une pompe à haute pression

Country Status (2)

Country Link
DE (1) DE102018206763A1 (fr)
WO (1) WO2019211021A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006051570A1 (de) * 2006-11-02 2008-05-08 Schaeffler Kg Rückschlagventil mit variabler Einstellung des Öffnungsdrucks
DE102011005487A1 (de) * 2011-03-14 2012-09-20 Robert Bosch Gmbh Ventileinrichtung, insbesondere Auslassventil einer Kraftstoff-Hochdruckpumpe einer Brennkraftmaschine
EP2183476B1 (fr) * 2007-07-30 2013-03-27 Robert Bosch GmbH Soupape d'injection de carburant avec une étanchéité améliorée au niveau du siège d'étanchéité d'une soupape de commande à pression compensée
DE102013204563A1 (de) * 2013-03-15 2014-09-18 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe mit einem zwischen einem Förderraum und einem Auslass angeordneten Auslassventil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006051570A1 (de) * 2006-11-02 2008-05-08 Schaeffler Kg Rückschlagventil mit variabler Einstellung des Öffnungsdrucks
EP2183476B1 (fr) * 2007-07-30 2013-03-27 Robert Bosch GmbH Soupape d'injection de carburant avec une étanchéité améliorée au niveau du siège d'étanchéité d'une soupape de commande à pression compensée
DE102011005487A1 (de) * 2011-03-14 2012-09-20 Robert Bosch Gmbh Ventileinrichtung, insbesondere Auslassventil einer Kraftstoff-Hochdruckpumpe einer Brennkraftmaschine
DE102013204563A1 (de) * 2013-03-15 2014-09-18 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe mit einem zwischen einem Förderraum und einem Auslass angeordneten Auslassventil

Also Published As

Publication number Publication date
DE102018206763A1 (de) 2019-11-07

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