WO2018197152A1 - 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 Download PDF

Info

Publication number
WO2018197152A1
WO2018197152A1 PCT/EP2018/058198 EP2018058198W WO2018197152A1 WO 2018197152 A1 WO2018197152 A1 WO 2018197152A1 EP 2018058198 W EP2018058198 W EP 2018058198W WO 2018197152 A1 WO2018197152 A1 WO 2018197152A1
Authority
WO
WIPO (PCT)
Prior art keywords
inlet valve
magnetic core
pump
plastic material
valve member
Prior art date
Application number
PCT/EP2018/058198
Other languages
German (de)
English (en)
Inventor
Stefan Kolb
Steffen Holm
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 WO2018197152A1 publication Critical patent/WO2018197152A1/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
    • 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
    • F02M59/367—Pump inlet valves of the check valve type being open when actuated
    • 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
    • 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
    • H01F7/127—Assembling
    • 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
    • H01F7/1607—Armatures entering the winding
    • 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
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
    • 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
    • F02M2200/8084—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
    • F02M2200/9015—Elastomeric or plastic materials

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 2015 212 390 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 magnetic coil, a magnetic core and an at least indirectly acting on the valve member armature.
  • the magnet armature is displaceably guided in a receptacle in a carrier element. When the solenoid is energized, the armature is movable against the force of a return spring.
  • the carrier element and the magnetic core are connected to each other via a sleeve-shaped connecting element, wherein the connecting element can be welded to the carrier element and / or the magnetic core.
  • the magnet core, the carrier element and the connecting element are at least partially surrounded by the magnetic coil, wherein between the magnetic core, the carrier gerelement and the connecting element on the one hand and the solenoid on the other hand, a gap is present, which is filled with air.
  • fuel is present, which allows cooling.
  • the magnetic coil can give off heat in the outer environment of the actuator. A heat transfer from the magnetic coil to the components surrounded by this carrier element, magnetic core and connecting element is limited by the existing air in the space possible.
  • the inlet valve according to the invention with the features of claim 1 has the advantage that an improved heat transfer from the solenoid to the carrier element and the magnetic core is made possible, whereby excessive heating of other parts of the actuator and / or this enclosing housing can be avoided can. Cooling is by the in
  • Support element available and this preferably flowing fuel allows. This also allows the control of the solenoid with higher currents whereby the range of application of the inlet valve can be extended. In addition, the penetration of moisture is at least reduced by the plastic material at least partially filling the intermediate space, thereby ensuring the function of the inlet valve over a long period of time.
  • the embodiment according to claim 2 has the advantage that a heat transfer from the magnetic coil is further improved.
  • the embodiment according to claim 3 the heat transfer from the magnetic coil is further improved and according to claim 4, at least one welded joint of the connecting element is protected against corrosion. Due to the construction according to claim 5, the plastic material can be introduced in a simple manner in the intermediate space.
  • FIG. 1 shows a schematic longitudinal section through a high-pressure pump
  • Figure 2 shows an enlarged view of a designated II in Figure 1 section with the inlet valve of the high-pressure pump
  • Figure 3 shows a further enlarged section of the inlet valve.
  • a high pressure pump is shown in fragmentary form, which is provided for fuel delivery 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 by a drive in a
  • a drive shaft 20 may be provided with a cam 22 or eccentric on which the pump piston 12 directly or via a plunger, for example a
  • 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.
  • fuel is expelled from the pump working chamber 18 and conveyed into the reservoir 30 when the inlet valve 24 is closed.
  • the inlet valve 24 has a piston-shaped valve member 34, which has a shaft 36 displaceably guided in the through-bore 32 and a head 38 which is larger in diameter than the shaft 36 and which is arranged in the pump working chamber 18.
  • valve seat 40 is formed, with which the valve member 34 cooperates with a formed on its head 38 sealing surface 42.
  • the passage bore 32 has a larger diameter than in the shaft 36 of the
  • Valve member 34 leading portion so that the shaft 36 of the valve member 34 surrounding annular space 44 is formed.
  • 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, which on the other hand is supported on a region of the housing part 16 surrounding the shaft 36 of the valve member 34.
  • the valve spring 50 is formed for example as a helical compression spring.
  • the inlet valve 24 is actuated by an electromagnetic actuator 60, which is shown in particular in Figures 2 and 3.
  • 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 surrounded by an actuator housing 70 which can be fastened to the housing part 16 of the high-pressure pump.
  • the actuator housing 70 is fastened to the housing part 16, for example, by means of a screw ring 72 engaging over this tigbar, which is screwed onto an externally threaded collar 74 of the housing part 16.
  • the armature 68 is at least substantially cylindrical in shape and guided in a receptacle in the form of a bore 76 in a carrier element 78 in the direction of its longitudinal axis 69 displaceably via its outer jacket 67.
  • the bore 76 in the carrier element 78 extends at least approximately coaxially to the through hole 32 in the housing part 16 of the high-pressure pump and thus to the valve member 34.
  • the bore 76 is followed in the support member 78 to the inlet valve 24 towards a further bore 77 with a smaller diameter than the bore 76 at.
  • the magnet armature 68 has an at least approximately coaxial to the longitudinal axis 69 of the armature 68 arranged central blind bore 81 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, which has a central blind 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.
  • the magnet armature 68 has one or more through openings 91 to allow passage of fuel during the movement of the magnet armature 68.
  • annular shoulder 88 is formed by the diameter reduction to the further bore 77. Between the annular shoulder 88 and the magnet armature 68 may be arranged a stop element 90, by which the movement of the armature 68 is limited to the inlet valve 24.
  • the stop element 90 is sleeve-shaped and through this the magnet armature 68 protrudes toward the inlet valve 24 and comes at least indirectly on the valve member 34 to the plant.
  • the magnetic core 66 and the carrier element 78 are connected to one another via a sleeve-shaped connecting element 92, which on the magnetic core 66 and on the carrier element 78 by means of a respective one
  • the solenoid 64 may be disposed on a bobbin 65 disposed within the solenoid 64.
  • the bobbin 65 surrounds the Carrier member 78 facing end portion of the magnetic core 66, the portion of the support member 78, in which the receptacle 76 is arranged for the armature 68, and the connecting member 92 to form a gap 94.
  • the gap 94 extends in the radial direction with respect to the longitudinal axis 69 of the armature 68 and in the direction of the longitudinal axis 69 of
  • a plastic material 95 is present, which preferably at least approximately completely fills the gap 94.
  • the plastic material 95 the radial distance between the inner surface of the bobbin 65 on the one hand and the outer surface of the
  • Carrier member 78, the connecting member 92 and the magnetic core 66 on the other hand completely filled. Due to the plastic material 95, a good heat transfer from the magnet coil 64 via the coil carrier 65 to the carrier element 78, the magnetic core 66 and the connecting element 92 is made possible.
  • the interior of the carrier element 78, in which the magnet armature 68 is arranged, is filled with fuel and flows through fuel, so that heat can be dissipated by the fuel.
  • the plastic material 95 is introduced, for example, in liquid form into the intermediate space 94 and subsequently hardens. This is particularly advantageous
  • Plastic material 95 introduced in a manufacturing process in which the plastic actuator housing 70 is made.
  • the components of the inlet valve 24 to be enclosed by the actuator housing 70 are inserted into a casting mold and subsequently the liquid plastic material is injected into the casting mold.
  • the carrier element 78 with the magnetic armature 68 arranged in the receptacle 76 and the magnetic core 66 connected thereto via the connecting element 92 forms a preassembled structural unit which is inserted with the magnetic core 66 into the magnetic coil 64 or its coil carrier 65.
  • a receptacle 96 may be formed for a plug element, via which and an electrical line connected to this, the magnetic coil 64 is connectable to the control device 62.
  • the inlet valve 24 is opened by having its valve member 34 in its open position. det, 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 magnetic coil 64 is energized, the magnetic armature 68 is pulled by the resulting magnetic field against the force of the return spring 82 to the magnetic core 66 out.
  • the armature 68 When the solenoid 64 is deenergized, the armature 68 is urged toward the inlet valve 24 by the force of the return spring 82. The magnet armature 68 abuts at least indirectly on the end face of the shaft 36 of the valve member 34.
  • 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 the pump piston 12 displaced 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 increased.
  • pressure pump can be set variably in the memory 30.
  • the intake valve 24 When a small fuel delivery amount is required, the intake valve 24 is kept open by the actuator 60 during a large part of the delivery stroke of the pump piston 12, and when a large fuel delivery amount is required, the intake valve 24 becomes only for a small part or not at all during the delivery stroke the pump piston 12 is kept open.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (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) qui est déplaçable entre une position d'ouverture et une position de fermeture. La soupape d'admission comprend un actionneur électromagnétique (60) au moyen duquel l'élément de soupape (34) peut être déplacé, l'actionneur électromagnétique (60) comprenant une bobine magnétique (64), un noyau magnétique (66) et un noyau plongeur (68) agissant au moins indirectement sur l'élément de soupape (34), lequel noyau plongeur est guidé de manière mobile, dans la direction de son axe longitudinal (69), dans un logement (76) d'un élément de support (78) Le noyau magnétique (66) et l'élément de support (78) sont entourés au moins partiellement par la bobine magnétique (64) en formant un espace intermédiaire (94). L'espace intermédiaire (94) est rempli au moins partiellement d'une matière synthétique (95). Grâce à la matière synthétique (95), le transfert de chaleur de la bobine magnétique (64) au noyau magnétique (66) et à l'élément de support (78) est amélioré, de manière à pouvoir réduire la température de la bobine magnétique (64).
PCT/EP2018/058198 2017-04-28 2018-03-29 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission WO2018197152A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017207219.9 2017-04-28
DE102017207219.9A DE102017207219A1 (de) 2017-04-28 2017-04-28 Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil

Publications (1)

Publication Number Publication Date
WO2018197152A1 true WO2018197152A1 (fr) 2018-11-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/058198 WO2018197152A1 (fr) 2017-04-28 2018-03-29 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission

Country Status (2)

Country Link
DE (1) DE102017207219A1 (fr)
WO (1) WO2018197152A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003038844A1 (fr) * 2001-10-22 2003-05-08 Robert Bosch Gmbh Support de bobine magnetique de masse reduite
US20030127544A1 (en) * 2002-01-08 2003-07-10 Demere Sims B. Fuel injector having a ferromagnetic coil bobbin
DE102004004708B3 (de) * 2004-01-30 2005-04-21 Karl Dungs Gmbh & Co. Kg Magnetventil
DE102005061410A1 (de) * 2005-12-22 2007-06-28 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil
WO2013064226A2 (fr) * 2011-11-01 2013-05-10 Norgren Gmbh Solénoïde doté d'un composant surmoulé
DE102013212121A1 (de) * 2013-06-25 2015-01-08 Robert Bosch Gmbh Kraftstoffzumesseinheit für ein Hochdruckeinspritzsystem
WO2015043637A1 (fr) * 2013-09-26 2015-04-02 Robert Bosch Gmbh Ensemble doseur
DE102015212390A1 (de) 2015-07-02 2017-01-05 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil für eine Hochdruckpumpe sowie Hochdruckpumpe

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003038844A1 (fr) * 2001-10-22 2003-05-08 Robert Bosch Gmbh Support de bobine magnetique de masse reduite
US20030127544A1 (en) * 2002-01-08 2003-07-10 Demere Sims B. Fuel injector having a ferromagnetic coil bobbin
DE102004004708B3 (de) * 2004-01-30 2005-04-21 Karl Dungs Gmbh & Co. Kg Magnetventil
DE102005061410A1 (de) * 2005-12-22 2007-06-28 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil
WO2013064226A2 (fr) * 2011-11-01 2013-05-10 Norgren Gmbh Solénoïde doté d'un composant surmoulé
DE102013212121A1 (de) * 2013-06-25 2015-01-08 Robert Bosch Gmbh Kraftstoffzumesseinheit für ein Hochdruckeinspritzsystem
WO2015043637A1 (fr) * 2013-09-26 2015-04-02 Robert Bosch Gmbh Ensemble doseur
DE102015212390A1 (de) 2015-07-02 2017-01-05 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil für eine Hochdruckpumpe sowie Hochdruckpumpe

Also Published As

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