EP3365551B1 - 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

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Publication number
EP3365551B1
EP3365551B1 EP16763548.1A EP16763548A EP3365551B1 EP 3365551 B1 EP3365551 B1 EP 3365551B1 EP 16763548 A EP16763548 A EP 16763548A EP 3365551 B1 EP3365551 B1 EP 3365551B1
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EP
European Patent Office
Prior art keywords
magnet
inlet valve
armature
magnetic core
pump
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.)
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Application number
EP16763548.1A
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German (de)
English (en)
Other versions
EP3365551A1 (fr
Inventor
Stefan Kolb
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
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Robert Bosch GmbH
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Publication of EP3365551A1 publication Critical patent/EP3365551A1/fr
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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
    • F02M59/46—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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear

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 actuated intake valve for a high-pressure pump of a fuel injection system is characterized by the DE 10 2013 220 593 A1 known.
  • the high-pressure pump has at least one pump element with a pump piston driven in a stroke movement, which delimits a pump working space.
  • 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 an armature acting at least indirectly on the valve member, a magnetic coil surrounding the magnet armature and a magnetic core.
  • the magnet armature is displaceably guided in a carrier element, wherein the carrier element and the magnetic core are connected to one another.
  • the solenoid 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.
  • a spacer made of non-magnetic material may be arranged to ensure a residual air gap and to magnetically bond the armature to the magnetic core avoid.
  • a fuel injector which has an electromagnetically actuable control valve.
  • the control valve has an electromagnetic actuator, which in turn has a magnetic armature, a magnetic coil and a magnetic core.
  • the magnetic core is arranged together with a hydraulic connection part in a sleeve-shaped housing body.
  • the magnetic core is provided with a coating of elastic material, by which a seal between the magnetic core and the connection part is ensured. The coating can also cause a damping between the magnetic core and the connecting part when striking the armature on the magnetic core.
  • a fuel injection valve which has an electromagnetically actuable control valve.
  • the control valve has an electromagnetic actuator, which in turn has a magnetic armature, a magnetic coil and a magnetic core.
  • the magnetic core is arranged together with the magnetic coil in a housing body.
  • these are encapsulated in a synthetic resin material, wherein the entire space between the magnetic core and the magnetic coil and the housing body is filled with the synthetic resin material.
  • a large amount of material is required and an expensive process for introducing the synthetic resin material required.
  • the inlet valve according to the invention with the features of claim 1 has the advantage that a secure support of the magnetic core is achieved by the intermediate layer consisting of adhesive, which hardens after introduction of the magnetic core, and thereby the load on the connection between the support member and the magnetic core Striking the armature can be relieved.
  • the arrangement of the intermediate layer only on the side facing away from the magnet armature of the magnetic core only a small amount of material is required.
  • FIG. 1 a schematic longitudinal section through a high-pressure pump
  • FIG. 2 in an enlarged view a in FIG. 1 labeled II section with the inlet valve of the high-pressure pump
  • FIG. 3 one in FIG. 2 With III designated section in a further enlarged view according to an embodiment.
  • FIG. 1 is a fragmentary illustrated a high-pressure pump, 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 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 limits a pump working chamber 18 in the cylinder bore 14.
  • 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 Roller tappet, supports.
  • 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 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 space 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.
  • 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, which on the other hand is supported on a portion 52 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 in particular in FIG. 2 is shown.
  • 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 body 70 which can be fastened to the housing part 16 of the high-pressure pump.
  • the housing body 70 can be fastened to the housing part 16, for example, by means of a screw ring 72 which overlaps it and which is screwed onto a collar 74 of the housing part 16 provided with an external thread.
  • the armature 68 is at least substantially cylindrical in shape and slidably guided over its outer jacket in a bore 76 in a carrier element 78 arranged in the housing body 70.
  • the bore 76 in the support member 78 extends at least approximately coaxially to the through hole 32 in the housing part 16 and thus to the valve member 34.
  • the support member 78 has in its the housing part 16 opposite end portion 79 has a cylindrical outer shape.
  • the magnetic core 66 is arranged in the housing body 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.
  • 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 body 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 68, 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 connecting element 90.
  • the connecting element 90 is arranged with its one axial end portion 90a on the cylindrical portion 79 of the support member 78 and connected thereto and arranged with its other axial end portion 90b on the cylindrical magnetic core 66 and connected thereto.
  • the connecting element 90 is, for example, materially connected to the carrier element 78 and the magnetic core 66, in particular welded.
  • the connecting element 90 is connected neither to the carrier element 78 nor to the magnetic core 66 and bridges an axial distance between the carrier element 78 and the magnetic core 66.
  • the housing body 70 is preferably made of plastic, for example in an injection molding process.
  • the magnetic coil 64 and optionally further parts of the electromagnetic actuator 60 are encapsulated by the plastic material of the housing body 70.
  • the magnetic core 66 together with the carrier element 78 forms a preassembled module, which is used after the production of the housing body 70 in this.
  • the magnetic core 66 in this case enters into a surrounding recess 94 in the housing body 70 on its circumference.
  • the recess 94 is limited on its side facing away from the carrier element 78 by a wall 95 of the housing body 70.
  • the magnetic core 66 at least on its side facing away from the magnet armature 68 via an intermediate layer 96 on the housing body 70, in particular on the wall 95 is supported.
  • the intermediate layer 96 is applied before the introduction of the magnetic core 66 on the housing body 70 and / or on the magnetic core 66 and partially displaced during the introduction of the magnetic core 66 into the housing body 70.
  • the intermediate layer 96 consists of an adhesive which is plastically deformable during the introduction of the magnetic core 66 into the housing body 70.
  • the adhesive is partially displaced by the magnetic core 66, so that it is ensured that a space present between the end face of the magnetic core 66 and the wall 95 is completely filled with adhesive.
  • the adhesive hardens, so that the magnetic core 66 is supported on the wall 95 of the housing body 70 via the intermediate layer 96 of adhesive.
  • the load of the connection by means of the connecting element 92 between the support member 78 and the magnetic core 66 when striking the armature 68 at least indirectly on the magnetic core 66th decreases, since a portion of the forces occurring from the magnetic core 66 via the intermediate layer 96 is received by the housing body 70.
  • 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 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 over the anchor bolt 86 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 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 armature 68 toward the magnetic core 66 in a direction opposite to the direction of adjustment B direction of arrow A in FIG. 2 is pulled.
  • 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.

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

Claims (4)

  1. Vanne d'entrée (24) pouvant être actionnée de manière électromagnétique pour une pompe à haute pression, notamment d'un système d'injection de carburant, comprenant un élément de vanne (34), qui peut être déplacé entre une position ouverte et une position fermée, comprenant un actionneur électromagnétique (60) par le biais duquel l'élément de vanne (34) peut être déplacé, l'actionneur électromagnétique (60) possédant un induit magnétique (68) qui agit au moins indirectement sur l'élément de vanne (34), une bobine magnétique (64) qui entoure l'induit magnétique (68) et un noyau magnétique (66) contre lequel l'induit magnétique (68) vient s'appuyer au moins indirectement lors de la mise sous tension de la bobine magnétique (64), l'induit magnétique (68) étant guidé de manière coulissante dans un élément porteur (78) et l'élément porteur (78) et le noyau magnétique (66) étant reliés l'un à l'autre, caractérisée en ce que le noyau magnétique (66) est au moins partiellement entouré par un corps de boîtier (70) et en ce que le noyau magnétique (66) n'est soutenu dans le corps de boîtier (70) par le biais d'une couche intermédiaire (96) que sur son côté à l'opposé de l'induit magnétique (68) et e ce que la couche intermédiaire (96) se compose d'adhésif qui est facilement malléable pendant l'introduction du noyau magnétique (66) dans le corps de boîtier (70) et qui durcit après l'introduction du noyau magnétique (66).
  2. Vanne d'entrée selon la revendication 1, caractérisée en ce que le noyau magnétique (66) est de configuration au moins approximativement cylindrique et en ce que la couche intermédiaire (96) recouvre au moins son côté frontal à l'opposé de l'induit magnétique (68).
  3. Vanne d'entrée selon l'une des revendications précédentes, caractérisée en ce que la bobine magnétique (64) est elle aussi accueillie dans le corps de boîtier (70).
  4. Pompe à haute pression, notamment pompe à haute pression pour carburant, comprenant au moins un élément de pompe (10) qui possède un piston de pompe (12) qui délimite un espace de travail de pompe (18), l'espace de travail de pompe (18) pouvant être relié à une arrivée (26) par le biais d'une vanne d'entrée (24), caractérisée en ce que la vanne d'entrée (24) est configurée selon l'une des revendications précédentes.
EP16763548.1A 2015-10-22 2016-09-13 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission Active EP3365551B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015220677.7A DE102015220677A1 (de) 2015-10-22 2015-10-22 Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
PCT/EP2016/071571 WO2017067715A1 (fr) 2015-10-22 2016-09-13 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission

Publications (2)

Publication Number Publication Date
EP3365551A1 EP3365551A1 (fr) 2018-08-29
EP3365551B1 true EP3365551B1 (fr) 2019-08-28

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EP16763548.1A Active EP3365551B1 (fr) 2015-10-22 2016-09-13 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission

Country Status (3)

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EP (1) EP3365551B1 (fr)
DE (1) DE102015220677A1 (fr)
WO (1) WO2017067715A1 (fr)

Families Citing this family (1)

* 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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1064679A (en) * 1962-12-03 1967-04-05 Ass Eng Ltd Fuel injectors for internal combustion engines
EP1486665A4 (fr) * 2002-03-15 2010-09-01 Bosch Automotive Systems Corp Injecteur de combustible
DE102013220593A1 (de) 2013-10-11 2015-04-16 Robert Bosch Gmbh Elektromagnetisch ansteuerbares Saugventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
DE102015220677A1 (de) 2017-04-27
WO2017067715A1 (fr) 2017-04-27
EP3365551A1 (fr) 2018-08-29

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