EP3423717A1 - Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission - Google Patents

Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission

Info

Publication number
EP3423717A1
EP3423717A1 EP17700485.0A EP17700485A EP3423717A1 EP 3423717 A1 EP3423717 A1 EP 3423717A1 EP 17700485 A EP17700485 A EP 17700485A EP 3423717 A1 EP3423717 A1 EP 3423717A1
Authority
EP
European Patent Office
Prior art keywords
inlet valve
armature
magnetic core
intermediate element
sleeve
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.)
Granted
Application number
EP17700485.0A
Other languages
German (de)
English (en)
Other versions
EP3423717B1 (fr
Inventor
Gabriel CICHON
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
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 EP3423717A1 publication Critical patent/EP3423717A1/fr
Application granted granted Critical
Publication of EP3423717B1 publication Critical patent/EP3423717B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • 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
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • F04B49/243—Bypassing by keeping open the inlet valve
    • 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
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
    • 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
    • F02M2200/9053—Metals
    • F02M2200/9069—Non-magnetic metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F2007/1661—Electromagnets or actuators with anti-stick disc

Definitions

  • the invention relates to an electromagnetically operable inlet valve for a high pressure pump, in particular a fuel injection system, according to the preamble of claim 1. Furthermore, the invention relates to a high pressure pump with such an inlet valve.
  • An electromagnetically operable inlet valve for a high-pressure pump of a fuel injection system is known from DE 10 2014 200 339 A1.
  • the high-pressure pump has at least one pump element with one in one
  • the pump working space can be connected to an inlet for the fuel via the inlet valve.
  • the inlet valve comprises a valve member which cooperates with a valve seat for control and which is movable between an open position and a closed position. In its closed position, the valve member comes to rest against the valve seat.
  • the inlet valve comprises an electromagnetic actuator, through which the valve member is movable.
  • the electromagnetic actuator has a magnet armature acting at least indirectly on the valve member, a magnet coil surrounding the magnet armature and a magnet core.
  • the magnet armature is displaceably guided in a carrier element, wherein the carrier element and the magnetic core are connected to each other via a sleeve-shaped component.
  • the armature When the solenoid is energized, the armature is movable against the force of a return spring and comes at least indirectly on the magnetic core to the plant. If the magnet armature comes to bear directly on the magnet core, this can lead to so-called magnetic sticking and a movement of the magnet armature away from the magnet core is thereby achieved. sword. This can lead to delays in the movement of the armature and thus to functional impairments of the intake valve. In addition, it can lead to high loads of these two components and the connection between the support member and the magnetic core when hitting the magnet armature on the magnetic core, which over a longer period of operation may cause damage to the connection between the magnetic core and the support element, whereby the operability of the inlet valve impaired can be. If necessary, the magnetic core has to be elaborately machined in order to achieve sufficient wear resistance.
  • the inlet valve according to the invention with the features of claim 1 has the advantage that a direct contact with the magnetic core is avoided by the intermediate element, so that its load is reduced.
  • By connecting the intermediate element with the sleeve-shaped component no additional assembly step is required for this and this is positioned directly during the assembly of the sleeve-shaped component between the armature and the magnetic core.
  • FIG. 1 shows a schematic 2 longitudinal section through a high-pressure pump
  • Figure 2 shows an enlarged view of a designated II in Figure 1 section with an inlet valve of the high-pressure pump
  • Figure 3 a in Figure 2 with III designated section in a further enlarged view according to a first embodiment
  • Figure 4 the section III according to a second embodiment.
  • a high pressure pump is shown in fragmentary form, which is provided for the production of fuel in a fuel injection system of an internal combustion engine.
  • the high-pressure pump has at least one pump element 10, which in turn has a pump piston 12, which is driven by a drive in a lifting movement, is guided in a cylinder bore 14 of a housing part 16 of the high pressure pump and in the cylinder bore 14 a pump working space 18 limited.
  • a drive for the pump piston 12 a
  • Drive shaft 20 may be provided with a cam 22 or eccentric on which the pump piston 12 is supported directly or via a plunger, for example a roller tappet.
  • the pump working chamber 18 can be connected to a fuel inlet 26 via an inlet valve 24 and via an outlet valve 28 to a reservoir 30.
  • the pump working chamber 18 can be filled with fuel when the inlet valve 24 is open.
  • the delivery stroke of the pump piston 12 is displaced by this fuel from the pump working chamber 18 and conveyed into the memory 30.
  • the housing part 16 of the high-pressure pump as shown in FIG.
  • the inlet valve 24 has a piston-shaped valve member 34 which has a shaft 36 slidably guided in the through-bore 32 and a diameter in relation to the
  • Shaft 36 has larger head 38 which is arranged in the pump working chamber 18.
  • a valve seat 40 is formed on the housing part 16, with which the valve member 34 cooperates with a formed on its head 38 sealing surface 42.
  • the through hole 32 has a larger diameter than in the shaft 36 of the valve member 34 leading section, so that the shaft 36 of the valve member 34 surrounding annular space 44 is formed.
  • in the annular space 44 open one or more inlet bores 46, on the other hand open on the outside of the housing part 16.
  • valve member 34 protrudes on the pump working chamber 18 side facing away from the housing part 16 out of the through hole 32 and on this a support member 48 is attached.
  • a valve spring 50 is supported, on the other hand supported on a shaft 36 of the valve member 34 surrounding region of the housing part 16.
  • the inlet valve 24 can be actuated by an electromagnetic actuator 60, which is shown in particular in FIG.
  • the actuator 60 is controlled by an electronic control device 62 as a function of operating parameters of the internal combustion engine to be supplied.
  • the electromagnetic actuator 60 has a magnetic coil 64, a magnetic core 66 and a magnet armature 68.
  • the electromagnetic actuator 60 is arranged on the pump working chamber 18 side facing away from the inlet valve 24.
  • the magnetic core 66 and the magnetic coil 64 are arranged in a housing 70, which can be designed in several parts and which can be fastened to the housing part 16 of the high-pressure pump.
  • the housing 70 can be fastened, for example, to the housing part 16 by means of a fastening element in the form of a screw ring 72, which is screwed onto a cylindrical section 74 of the housing part 16 provided with an external thread.
  • the magnet armature 68 is formed at least substantially cylindrical and slidably guided over its outer jacket in a bore 76 in a carrier element 78 arranged in the housing 70.
  • the bore 76 in the carrier element 78 extends at least approximately coaxially to the through-bore 32 in the housing part 16 and thus to the valve member 34.
  • the carrier element 78 points in FIG his the housing part 16 remote from the end portion 77 on a cylindrical outer shape.
  • the magnetic core 66 is arranged in the housing 70 on the side facing away from the housing part 16 of the support member 78 and has a cylindrical outer shape.
  • the armature 68 has an at least approximately coaxial with the longitudinal axis 69 of the magnet armature 68 disposed central bore 80 into which a on the valve member 34 remote from the armature 68 disposed return spring 82 projects, which is supported on the armature 68.
  • the return spring 82 is supported at its other end at least indirectly on the magnetic core 66 having a central bore 84 into which the return spring 82 protrudes.
  • a support member 85 may be inserted for the return spring 82, for example, be pressed.
  • an intermediate element 86 is inserted, which may be formed as an anchor bolt.
  • the anchor bolt 86 is preferably pressed into the bore 80 of the magnet armature 68.
  • the return spring 80 may also be supported in the bore 80 on the anchor bolt 86.
  • the magnet armature 68 may have one or more passage openings 67.
  • an annular shoulder 88 is formed by a reduction in diameter between the armature 68 and the inlet valve 24, by which the movement of the armature 68 is limited to the inlet valve 24 out. If the housing 70 is not yet attached to the housing part 16 of the high pressure pump, the armature 68 is secured by the annular shoulder 88 against falling out of the bore 76. Between the annular shoulder 88 and the magnet armature
  • a disc 89 may be arranged.
  • the carrier element 78 and the magnetic core 66 are connected to one another by means of a sleeve-shaped component 90.
  • the component 90 is arranged with its one axial end portion on the cylindrical portion 77 of the support member 78 and connected thereto and arranged with its other axial end portion on the cylindrical magnetic core 66 and connected thereto.
  • the sleeve-shaped component 90 is, for example, materially connected to the carrier element 78 and the magnetic core 66, in particular welded.
  • the welded joints are marked in FIG. 3 by triangles labeled A.
  • the disc-shaped intermediate member 92 is disposed within the sleeve-shaped member 90 and connected to the inner shell or integrally formed therewith.
  • the intermediate member 92 has a central opening 93 through which the return spring 82 passes.
  • the component 90 and the intermediate element 92 may be made of steel and the intermediate element 92 may be integrally formed with the component 90 or is connected at its radially outer edge region with the component 90, for example welded.
  • the intermediate element 92 and also the component 90 are made of non-magnetic steel.
  • the intermediate member 92 may be made of a material having high wear resistance.
  • the intermediate element 92 is positioned such that it bears against the end face of the magnetic core 66 facing the magnet armature 68.
  • the sleeve-shaped member 90 is welded to the magnetic core 66 and the support member 78.
  • the magnet coil 64 When the magnet coil 64 is energized, the magnet armature 68 is moved toward the magnet core 66 and comes to rest on the magnet core 66 via the intermediate element 92.
  • the stop of the magnet armature 68 takes place on the intermediate element 92, which is connected to the sleeve-shaped component 90, whereby the load of the magnetic core 66 is kept low.
  • the armature 68 is shown in its position when energized solenoid 64 and this is in contact with the intermediate element 92nd
  • FIG. 4 shows a second exemplary embodiment, in which again the disc-shaped intermediate element 92 is provided which is arranged between magnet armature 68 and magnetic core 66.
  • the intermediate element 92 has at its radially outer edge region a collar 94 which extends in the direction of the longitudinal axis 69 of the magnet armature 68 and which is arranged between the carrier element 78 and the magnetic core 66.
  • the collar 94 forms a sleeve-shaped component, via which the carrier element 78 and the magnetic core 66 are connected to one another.
  • the rule 92 with the collar 94 may be integrally formed or the collar 94 may be connected to the intermediate element 92, for example, be welded.
  • the collar 94 extends between the mutually facing end faces of the support member 78 and the magnetic core 66 and is connected to these in each case, preferably welded.
  • the welded connections of the collar 94 are marked in FIG. 4 by triangles labeled A.
  • the collar 94 is tightly connected to the support member 78 and the magnetic core 66, so that the internal space in which the armature 68 is disposed opposite to the collar 94 surrounding outer space is sealed.
  • the armature 68 is shown in its position when energized solenoid 64 and this is in contact with the intermediate element 92nd
  • the formation of the intermediate element 92 with the collar 94 according to the second embodiment can also be provided when using a separate sleeve-shaped component 90 as in the first embodiment, in which case the intermediate element 92 is connected via the collar 94 to the component 90, for example, welded ,
  • the inlet valve 24 is opened by the valve member 34 is in its open position, in which this is arranged with its sealing surface 42 away from the valve seat 40.
  • the movement of the valve member 34 in its open position is effected by the prevailing between the fuel inlet 26 and the pump working chamber 18 pressure difference against the force of the valve spring 50.
  • the magnetic coil 64 of the actuator 60 may be energized or de-energized. When the solenoid 64 is energized, the armature 68 is pulled by the resulting magnetic field against the force of the return spring 80 to the magnetic core 66 out.
  • the actuator 60 determines whether the valve member 34 of the inlet valve 24 is in its open position or closed position.
  • the armature 68 is pressed by the return spring 82 in the direction of arrow B in Figure 2, wherein the valve member 34 is pressed by the armature 68 against the valve spring 50 in the direction of adjustment B in its open position.
  • the force of the force acting on the armature 68 return spring 82 is greater than the force of the valve member 34 acting on the valve spring 50.
  • the armature 68 acts on the valve member 34 and the armature 68 and the valve member 34 are together in the direction of adjustment B emotional.
  • the solenoid coil 64 is not energized can thus be promoted by the pump piston 12 no fuel in the memory 30 but displaced by the pump piston 12 fuel is fed back into the fuel inlet 26. If during the delivery stroke of the pump piston 12 fuel is to be conveyed into the reservoir 30, the magnetic coil 64 is energized, so that the magnet armature 68 is pulled toward the magnetic core 66 in a direction opposite to the direction of adjustment B as indicated by arrow A in FIG.
  • the armature 68 thus no longer exerts force on the valve member 34, wherein the magnet armature 68 is moved by the magnetic field in the direction A and the valve member 34 independent of the armature 68 due to the valve spring 50 and between the pump working chamber 18 and the fuel inlet 26 prevailing pressure difference in the direction of adjustment A is moved to its closed position.
  • the delivery rate of the high-pressure pump can be set variably in the memory 30.
  • the intake valve 34 is kept open by the actuator 60 during a large part of the delivery stroke of the pump piston 12, and if a large fuel delivery amount is required, the intake valve 34 becomes only for a small part or not at all during the delivery stroke the pump piston 12 is kept open.

Landscapes

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

Abstract

L'invention concerne une soupape d'admission (24) à commande électromagnétique destinée à une pompe haute pression, en particulier d'un système d'injection de carburant. La soupape d'admission (24) présente un élément de soupape (34) mobile entre une position d'ouverture et une position de fermeture. Un actionneur électromagnétique (60) permet le déplacement de l'élément de soupape (34), l'actionneur électromagnétique (60) présentant une armature magnétique (68) agissant au moins indirectement sur l'élément de soupape (34), une bobine magnétique (64) entourant l'armature magnétique (68), et un noyau magnétique (66) sur lequel l'armature magnétique (68) vient au moins indirectement en appui lorsque la bobine magnétique (64) est alimentée, l'armature magnétique (68) étant guidée mobile dans un élément de support (78) et l'élément de support (78) et le noyau magnétique (66) étant reliés l'un à l'autre par l'intermédiaire d'un élément en forme de manchon (90). Entre l'armature magnétique (68) et l'extrémité du noyau magnétique (66) proche de ladite armature se trouve un élément intermédiaire (92) en forme de disque qui est relié à l'élément en forme de manchon (90). La présence de l'élément intermédiaire (92) en forme de disque permet de réduire la contrainte imposée au noyau magnétique (66) lorsque l'armature magnétique (68) vient en appui sur lui. L'élément intermédiaire (92) est réalisé dans un matériau non magnétique de sorte que celui-ci permet également une séparation magnétique entre l'armature magnétique (68) et le noyau magnétique (66).
EP17700485.0A 2016-03-03 2017-01-03 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission Active EP3423717B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016203516.9A DE102016203516A1 (de) 2016-03-03 2016-03-03 Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
PCT/EP2017/050072 WO2017148600A1 (fr) 2016-03-03 2017-01-03 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission

Publications (2)

Publication Number Publication Date
EP3423717A1 true EP3423717A1 (fr) 2019-01-09
EP3423717B1 EP3423717B1 (fr) 2020-07-15

Family

ID=57821948

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17700485.0A Active EP3423717B1 (fr) 2016-03-03 2017-01-03 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission

Country Status (3)

Country Link
EP (1) EP3423717B1 (fr)
DE (1) DE102016203516A1 (fr)
WO (1) WO2017148600A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19639117A1 (de) * 1996-09-24 1998-03-26 Bosch Gmbh Robert Brennstoffeinspritzventil
US6655611B2 (en) * 2001-02-12 2003-12-02 Delphi Technologies, Inc. Electromagnetic fuel injector comprising flexible element for positioning armature
JP3874698B2 (ja) * 2002-06-05 2007-01-31 株式会社デンソー 電磁弁用ソレノイド
DE102009003213A1 (de) * 2009-05-19 2010-11-25 Robert Bosch Gmbh Restluftspaltscheibe
DE102014200339A1 (de) 2014-01-10 2015-07-16 Robert Bosch Gmbh Elektromagnetisch ansteuerbares Saugventil
DE102014215589A1 (de) * 2014-02-10 2015-08-13 Robert Bosch Gmbh Restluftspaltscheibe für eine Magnetbaugruppe eines Magnetventils und Verfahren zum Herstellen einer Restluftspaltscheibe
DE102014214231A1 (de) * 2014-07-22 2016-01-28 Robert Bosch Gmbh Elektromagnetische Stelleinheit für ein Saugventil sowie Saugventil

Also Published As

Publication number Publication date
DE102016203516A1 (de) 2017-09-07
EP3423717B1 (fr) 2020-07-15
WO2017148600A1 (fr) 2017-09-08

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