WO2018033278A1 - Soupape d'aspiration à actionnement électromagnétique et pompe à carburant haute pression - Google Patents

Soupape d'aspiration à actionnement électromagnétique et pompe à carburant haute pression Download PDF

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Publication number
WO2018033278A1
WO2018033278A1 PCT/EP2017/065202 EP2017065202W WO2018033278A1 WO 2018033278 A1 WO2018033278 A1 WO 2018033278A1 EP 2017065202 W EP2017065202 W EP 2017065202W WO 2018033278 A1 WO2018033278 A1 WO 2018033278A1
Authority
WO
WIPO (PCT)
Prior art keywords
suction valve
sealing element
fuel pump
annular sealing
pressure fuel
Prior art date
Application number
PCT/EP2017/065202
Other languages
German (de)
English (en)
Inventor
Christian Langenbach
Klaus Wuerth
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 WO2018033278A1 publication Critical patent/WO2018033278A1/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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • F02M59/368—Pump inlet valves being closed when actuated
    • 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
    • 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
    • F04B53/108—Valves characterised by the material
    • F04B53/1082—Valves characterised by the material magnetic
    • 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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0076—Piston machines or pumps characterised by having positively-driven valving the members being actuated by electro-magnetic means
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated valves
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0686—Braking, pressure equilibration, shock absorbing
    • F16K31/0693—Pressure equilibration of the armature
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • Electromagnetically Operated Suction Valve and High-pressure Fuel Pump The invention relates to an electromagnetically actuated suction valve for a
  • High-pressure fuel pump with the features of the preamble of claim 1.
  • the proposed solenoid-operated suction valve is used to supply a high-pressure fuel pump with fuel.
  • the invention therefore further relates to a high-pressure fuel pump with such a suction valve.
  • an electromagnetically actuated suction valve for filling a high-pressure element space of a high-pressure pump with fuel which is integrated in such a way in a housing part of the high-pressure pump, that the housing part a guide and a valve seat for a valve piston of the suction valve formed.
  • the housing part After assembly of the valve piston therefore only a magnetic part of the suction valve must be connected to the housing part of the high-pressure pump.
  • the connection of the magnetic part takes place via a magnetic sleeve formed as a deep-drawn part, which is an annular
  • Magnetic coil for acting on an armature can be coupled to the valve piston surrounds.
  • an end portion of the magnet sleeve is slipped over a collar of the housing part of the high-pressure pump and deformed such that the end portion engages in a circumferential annular groove of the collar.
  • a sealing ring is inserted between the collar of the housing part and the valve part of the suction valve.
  • the present invention is based on the object, an electromagnetically actuated suction valve for a high-pressure fuel pump with an improved specify the sealing concept.
  • the suction valve should be easy to attach to a housing part of the high-pressure fuel pump.
  • the electromagnetically actuated suction valve proposed for a high-pressure fuel pump comprises an annular magnet coil for acting on an armature which can be coupled to a valve tappet and which is received in a lift-movable manner at least in sections in a central recess of a valve body.
  • a magnetic coil surrounding the magnetic coil is at least partially axially supported, which has a radially outwardly extending collar for receiving a clamping nut, by means of which the suction valve to the high-pressure pump can be fixed.
  • an annular sealing element is arranged on the magnet sleeve directly adjacent to the collar.
  • the sealing element serves to seal the suction valve to the outside, wherein the position of the sealing element is selected such that after fixing the suction valve by means of a clamping nut on the high-pressure pump neither on the threaded portion of the clamping nut on the support region of the clamping nut on the collar of the magnet sleeve moisture inside of the suction valve is able to advance.
  • a clamping nut on the high-pressure pump neither on the threaded portion of the clamping nut on the support region of the clamping nut on the collar of the magnet sleeve moisture inside of the suction valve is able to advance.
  • the annular sealing element is preferably made of an elastically deformable
  • the sealing element Due to the elastic deformability of the material, the sealing element can be biased in the axial and / or radial direction. The bias increases the sealing force, so that the sealing effect is improved. Furthermore, by means of an elastically deformable sealing element manufacturing tolerances and / or assembly tolerances can be compensated in a simple manner. Particularly preferably, the sealing element made of polytetrafluoroethylene (PTFE), silicone or fluorocarbon rubber (FKM) is made. These materials are not only elastically deformable, but also have a certain "hardness", which prevents the sealing element from being cut during assembly of the suction valve.
  • PTFE polytetrafluoroethylene
  • FKM fluorocarbon rubber
  • the annular sealing element has a cross-sectional shape which is mirror-symmetrical about at least one axis.
  • the sealing element is mirrored about an axis which is perpendicular to the longitudinal axis of the magnet sleeve.
  • the sealing element may have a substantially rectangular cross-section.
  • the annular sealing element has at least one rounded or chamfered edge. Preferably, all edges are rounded or beveled. This ensures that the sealing element does not collide with curves and / or bevels, which are possibly formed on the components surrounding the sealing element. This applies in particular to a sealing element which has a substantially rectangular cross-section.
  • the annular sealing element has at least one constriction.
  • Two constrictions are preferably located opposite the sealing element, so that in each case a constriction is formed on the inside and outside circumference and / or on the two end faces.
  • the constrictions facilitate the required elastic deformation of the sealing element, so that a better sealing effect can be realized.
  • the deformation is preferably achieved during assembly of the suction valve.
  • the annular sealing element bears against the magnet sleeve under radial prestressing. This means that the sealing element is already preloaded radially before mounting the suction valve. The radial bias holds the sealing element captive on the magnet sleeve.
  • a high-pressure fuel pump for a fuel injection system with a suction valve according to the invention and a clamping nut is also proposed.
  • the suction valve is fixed to a cylinder head of the high-pressure fuel pump.
  • the clamping nut has a collar portion for axial support on the collar of the magnet sleeve and a threaded portion for screwing with a mating thread on the high-pressure pump.
  • the clamping nut comes to lie on the side facing away from the sealing element of the collar of the magnet sleeve, so that the axial bias of the annular sealing element is effected via the tightening force of the clamping nut.
  • the axial prestressing should ensure sufficient compression of the sealing element over the occurring tolerance layers.
  • the clamping nut is preferably screwed onto a collar portion of the cylinder head.
  • the collar portion of the cylinder head is for this purpose preferably provided with an external thread which is adapted to the internal thread of the clamping nut and vice versa.
  • the collar section facilitates installation.
  • the annular sealing element is preferably clamped axially with the suction valve mounted between the collar of the magnet sleeve and an end face of the collar portion of the cylinder head. This means that moisture can not pass from the outside either behind the magnetic sleeve of the suction valve, or behind the collar portion of the cylinder head of the high-pressure pump.
  • the axially clamped sealing element is at the same time radially deformed in such a way that it bears against a radial prestress on both the magnet sleeve and the clamping nut. In this way, the sealing effect is further optimized.
  • the annular sealing element is further radially clamped between the clamping nut and the magnet sleeve.
  • FIG. 1 shows a schematic longitudinal section through an inventive suction valve, which is integrated in a high-pressure fuel pump, and
  • FIGS. 2-9 each show a schematic cross section through an annular sealing element for a suction valve according to the invention.
  • the electromagnetically actuated intake valve 1 shown in FIG. 1 serves to supply a high-pressure fuel pump 2 with fuel.
  • the suction valve 1 is for this purpose integrated into a cylinder head 14 of the high-pressure fuel pump 2, in such a way that a valve stem 4 of the intake valve 1 is guided in a liftable manner via a bore 21 formed in the cylinder head 14.
  • the bore 21 opens via a valve seat 23 into a high-pressure element space 20 of the high-pressure fuel pump 2, so that when the suction valve 1 is open, fuel flows from a low-pressure space 24 via inlet bores 25 and the valve seat 23 into the high-pressure element space 20.
  • valve stem 4 is acted upon in the closing direction by the spring force of a valve spring 22, so that the spring force of the valve spring 22 pulls the valve stem 4 into the valve seat 23.
  • another spring 26 is provided whose spring force is greater than that of the valve spring 22.
  • the further spring 26 is supported on the one hand on an armature 5, on the other hand on a pole core 17 which defines a working air gap 18 together with the armature 5. If there remains a magnetic coil 3 provided for acting on the armature 5 without being energized, the spring force of the spring 26 keeps the suction valve 1 open. To close the suction valve 1, the magnetic coil 3 is energized.
  • a magnetic field is formed whose magnetic force pulls the armature 5 in the direction of the pole core 17 in order to close the working air gap 18 formed between the pole core 17 and the armature 5.
  • the armature 5 is embodied as a plunger armature and accommodated in a central recess 6 of a valve body 7, which is inserted in sections into the cylinder head 14 of the high-pressure fuel pump 2.
  • the valve body 7 is fixedly connected to the pole core 17 via a sleeve 19.
  • the sleeve 19 is welded to the valve body 7 and the pole core 17 for this purpose.
  • a magnetic sleeve 8 is supported, which surrounds the magnetic coil 3 at least in sections.
  • a collar 9 is formed, which extends radially outward and the support of a collar portion 27 of a clamping nut 10 is used, by means of which the suction valve 1 is fixed to the cylinder head 14 of the high-pressure fuel pump 2.
  • the cylinder head 14 has for this purpose a collar portion 15, with which the clamping nut 10 is screwed by a threaded portion 28.
  • annular sealing element 11 is arranged on the magnet sleeve 8 below the collar 9, which when screwing the clamping nut 10 with the collar portion 15th the cylinder head 14 between the collar 9 and an end face 16 of the collar portion 15 is axially clamped.
  • the sealing element 11 deforms, so that it is preferably clamped radially at the same time in order to optimize the sealing effect.
  • the degree of deformation of the sealing element depends on the one hand on the axial biasing force, on the other hand on the cross-sectional shape of the sealing element. In the embodiment shown in Fig. 1, the sealing element 11 has a rectangular cross-section.
  • FIGS. 2 to 9 Advantageous cross-sectional shape variants are shown in FIGS. 2 to 9.
  • FIG. 2 shows an annular sealing element 11 with a substantially rectangular cross-sectional shape, which moreover has rounded edges 12.
  • the sealing element 11 may also have chamfered edges 12. Corresponding embodiments are shown in FIGS.
  • a cross-sectional shape with at least one constriction 13 which may be on the outer peripheral side (see FIG. 5), on the inner peripheral side (see FIG. 6) or on both the outer and inner peripheral sides (see FIG. 7).
  • constrictions 13 arranged on the front side can be provided.
  • the at least one constriction 13 improves the deformability of the sealing element 11 when an axial prestressing force is applied via the clamping nut 10. This leads to a deformation in the radial direction, so that at the same time a radial sealing effect can be achieved.

Landscapes

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

Abstract

L'invention concerne une soupape d'aspiration (1) à commande électromagnétique pour une pompe à carburant haute pression (2). La soupape comprend une bobine magnétique annulaire (3) destinée à agir sur une armature (5) qui peut être accouplée à un poussoir de soupape (4) et qui est logée au moins en partie dans un évidement central (6) d'un corps (7) de soupape de manière à pouvoir effectuer un mouvement de va-et-vient. Un manchon magnétique (8) entourant au moins en partie la bobine magnétique (3) est en appui axial sur le corps (7) de soupape, et possède un collet (9) s'étendant radialement vers l'extérieur et destiné à recevoir un écrou de serrage (10) au moyen duquel la soupape d'aspiration (1) peut être fixée à la pompe haute pression (2). Selon l'invention, un élément d'étanchéité annulaire (11) est agencé sur le manchon magnétique (8) de manière à s'appliquer directement contre le collet (9). En outre, l'invention concerne une pompe à carburant haute pression (2) pourvue d'une soupape d'aspiration (1) de ce type.
PCT/EP2017/065202 2016-08-17 2017-06-21 Soupape d'aspiration à actionnement électromagnétique et pompe à carburant haute pression WO2018033278A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016215304.8A DE102016215304A1 (de) 2016-08-17 2016-08-17 Elektromagnetisch betätigbares Saugventil und Kraftstoff-Hochdruckpumpe
DE102016215304.8 2016-08-17

Publications (1)

Publication Number Publication Date
WO2018033278A1 true WO2018033278A1 (fr) 2018-02-22

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PCT/EP2017/065202 WO2018033278A1 (fr) 2016-08-17 2017-06-21 Soupape d'aspiration à actionnement électromagnétique et pompe à carburant haute pression

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Country Link
DE (1) DE102016215304A1 (fr)
WO (1) WO2018033278A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018218379A1 (de) * 2018-10-26 2020-04-30 Robert Bosch Gmbh Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
DE102018221540A1 (de) 2018-12-12 2020-06-18 Robert Bosch Gmbh Pumpenzylinderkopf für eine Kraftstoffpumpe, Kraftstoffpumpe sowie Verfahren zur Herstellung einer Kraftstoffpumpe
DE102019201932A1 (de) * 2019-02-14 2020-08-20 Robert Bosch Gmbh Elektrisch betätigtes Ventil, in einer Hochdruckpumpe eines Kraftstoffeinspritzsystems
DE102021214023A1 (de) 2021-12-09 2023-06-15 Robert Bosch Gesellschaft mit beschränkter Haftung Hochdruckpumpe mit einem elektromagnetisch betätigbaren Saugventil, Kraftstoffeinspritzsystem sowie Verfahren zur Herstellung einer Hochdruckpumpe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69001691T2 (de) * 1989-03-07 1994-01-05 Procal Langres Statische Abdichtung.
JP2012082849A (ja) * 2010-10-07 2012-04-26 Hitachi Automotive Systems Ltd 電磁駆動機構、この電磁駆動機構を用いた電磁弁およびこの電磁弁を用いた電磁吸入弁を備えた可変流量式高圧燃料供給ポンプ
DE102012215068A1 (de) * 2012-08-24 2014-02-27 Robert Bosch Gmbh Zylinderkopf für eine Pumpe, insbesondere Kraftstoffhochdruckpumpe, und Pumpe mit Zylinderkopf
DE102014200695A1 (de) * 2014-01-16 2015-07-16 Robert Bosch Gmbh Hochdruckpumpe mit einem elektromagnetischen Saugventil
US20150300495A1 (en) * 2014-04-17 2015-10-22 Vistadeltek, Llc Ultra-seal gasket for joining high purity fluid pathways
DE102014220757A1 (de) 2014-10-14 2016-04-14 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil, Hochdruckpumpe mit einem solchen Saugventil sowie Verfahren zur Verbindung eines solchen Saugventils mit einem Gehäuseteil einer Hochdruckpumpe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69001691T2 (de) * 1989-03-07 1994-01-05 Procal Langres Statische Abdichtung.
JP2012082849A (ja) * 2010-10-07 2012-04-26 Hitachi Automotive Systems Ltd 電磁駆動機構、この電磁駆動機構を用いた電磁弁およびこの電磁弁を用いた電磁吸入弁を備えた可変流量式高圧燃料供給ポンプ
DE102012215068A1 (de) * 2012-08-24 2014-02-27 Robert Bosch Gmbh Zylinderkopf für eine Pumpe, insbesondere Kraftstoffhochdruckpumpe, und Pumpe mit Zylinderkopf
DE102014200695A1 (de) * 2014-01-16 2015-07-16 Robert Bosch Gmbh Hochdruckpumpe mit einem elektromagnetischen Saugventil
US20150300495A1 (en) * 2014-04-17 2015-10-22 Vistadeltek, Llc Ultra-seal gasket for joining high purity fluid pathways
DE102014220757A1 (de) 2014-10-14 2016-04-14 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil, Hochdruckpumpe mit einem solchen Saugventil sowie Verfahren zur Verbindung eines solchen Saugventils mit einem Gehäuseteil einer Hochdruckpumpe

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