WO2017144185A1 - 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
WO2017144185A1
WO2017144185A1 PCT/EP2017/050060 EP2017050060W WO2017144185A1 WO 2017144185 A1 WO2017144185 A1 WO 2017144185A1 EP 2017050060 W EP2017050060 W EP 2017050060W WO 2017144185 A1 WO2017144185 A1 WO 2017144185A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
inlet valve
carrier element
rib
pump
Prior art date
Application number
PCT/EP2017/050060
Other languages
German (de)
English (en)
Inventor
Achim Meisiek
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 WO2017144185A1 publication Critical patent/WO2017144185A1/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
    • 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

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 2013 220 593 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 one another.
  • 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.
  • the magnet armature When the magnet armature is impacted on the magnet core, high loads on these two components as well as the connection between the carrier element and the magnet core can occur, which over a longer period of operation Damage to the connection between the magnetic core and the support element may result, whereby the functioning of the intake valve may be impaired.
  • the connection of the magnetic core with the carrier element can be done for example by means of a sleeve which is welded to the two components.
  • the magnetic core and the carrier element are surrounded by a housing, which may be designed in several parts, and the connection between these components is arranged in an inner space of the housing.
  • the inlet valve according to the invention with the features of claim 1 has the advantage that penetration of moisture into the interior is prevented by the seal between the support member and the housing and thus the functionality of the inlet valve is permanently ensured.
  • 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 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 4 shows a modified embodiment of the seal
  • FIG. 5 shows the cutout III with a seal according to a second exemplary embodiment
  • FIG. 6 shows the detail III with a seal according to a third embodiment.
  • 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 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 is supported directly or via a plunger, for example a roller tappet.
  • the pump working chamber 18 can be connected via an inlet valve 24 to a fuel inlet 26 and via an outlet valve 28 having 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, the one in the through hole 32 slidably guided shaft 36 and a diameter in relation to the shaft 36 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.
  • 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 projects out of the through hole 32 on the side of the housing part 16 facing away from the pump working chamber 18, and a support element 48 is fastened to it.
  • a valve spring 50 is supported on the support element 48, which on the other hand is supported on a region 52 of the housing part 16 surrounding the shaft 36 of the valve member 34.
  • 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
  • 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 side of the inlet valve 24 facing away from the pump working chamber 18.
  • the magnetic core 66 and the magnetic coil 64 are arranged in a housing 70, which may be designed in several parts and which can be fastened to the housing part 16 of the high-pressure pump.
  • the housing 70 may include a bobbin 71, in which the magnetic coil 64 is received, wherein the bobbin 71 is disposed within the cup-shaped thoroughlybil- Deten housing 70. Furthermore, the housing 70 a the
  • 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 77 has 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.
  • annular shoulder 88 is formed by a reduction in diameter between the magnet armature 68 and the inlet valve 24, by means of which the movement of the armature 68 towards the inlet valve 24 is limited. 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 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 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 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 arranged in an inner space 91 of the housing 70 located inside the coil carrier 71.
  • the magnetic core 66 together with the support element 78, a preassembled module, which is used after the production of the housing 70 in the interior 91.
  • the support member 78 has in its the housing part 16 of the high-pressure pump end portion facing a larger diameter in relation to the cylindrical portion 77 flange-shaped portion 79.
  • the flange-shaped section 79 rests on the outside of the housing part 16 of the high-pressure pump, and on the side of the flange-shaped section 79 facing away from the housing part 16 the housing 70 and / or the coil support 71 abuts against it.
  • the interior 91 is sealed off from the exterior of the housing 70 by means of a seal between the carrier element 78 and the housing 70 or the coil carrier 71, so that moisture can not penetrate therein.
  • a sealing element 92 in the form of an elastically deformable sealing ring is provided for sealing between the carrier element 78 and the housing 70 or the coil carrier 71.
  • the sealing ring 92 is preferably arranged between the coil carrier 71 and the flange-shaped section 79 of the carrier element opposite thereto. ment 78 arranged. It can be provided that in the flange-shaped portion 79 of the support member 78 and / or in the coil support 71, an annular groove 93 is formed, in which the sealing ring 92 is immersed.
  • FIG. 4 shows a modified embodiment of the seal according to FIG. 3, in which the sealing ring 92 is arranged on the carrier element 78 in a groove in the region of the transition from its flange-shaped section 79 to its cylindrical section 77.
  • the coil support 71 lies with its edge at the transition from the flange-shaped portion 79 of the support member 78 opposite region to the interior 91 delimiting area on the sealing ring 92.
  • FIG. 5 shows a second exemplary embodiment of the seal between the carrier element 78 and the housing 70 or the coil carrier 71, in which at least one elastically and / or plastically deformable rib 94 is arranged on the housing 70 or on the coil carrier 71 the support member 78 comes to rest.
  • the at least one rib 94 is formed as a self-contained around the circumference of the housing 70 or bobbin 71 self-contained ring. It can be provided a plurality of concentrically arranged ribs 94 which extend on different diameters.
  • the at least one rib 94 is preferably formed such that its width becomes smaller towards the flange-shaped portion 79 of the carrier element 78, in particular in such a way that the rib 94 is at its side
  • the at least one rib 94 is pressed under bias against the flange-shaped portion 79 of the support member 78 and deforms this elastic and / or plastic, whereby a secure sealing of the interior 91 becomes.
  • the seal is further improved.
  • the at least one rib 94 is arranged on the flange-shaped section 79 of the carrier element 78 and not on the housing 70 or coil carrier 71.
  • the carrier element 78 will be made of a material with high strength, in particular metal, so that the arrangement of the at least one rib 94 on the housing 70 or coil carrier 71, which are preferably made of plastic, is more advantageous.
  • FIG. 6 shows a third exemplary embodiment of the seal between the carrier element 78 and the housing 70 or the coil carrier 71, in which at least one rib 96 projecting towards the opposite housing 70 or coil carrier 71 is arranged on the flange-shaped section 79 of the carrier element 78.
  • the support member 78 with the rib 96 is made of a material having greater hardness and strength than the housing 70 and / or the bobbin 71 and the rib 96 is tapered towards its end.
  • the at least one rib 96 is arranged on the housing 70 or on the coil carrier 71 and not on the carrier element 78.
  • the carrier element 78 will be made of a material with high strength, in particular metal, while the housing 70 or the bobbin 71 are made of plastic, so that the arrangement of the at least one rib 96 on the carrier element 78 is more advantageous.
  • 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 dominated by the between the fuel inlet 26 and the pump working chamber 18 Pressure difference against the force of the valve spring 50 causes.
  • 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 on the end face of the shaft 36 of the valve member 34 via the anchor bolt 86. During the delivery stroke of the pump piston 12 is determined by the actuator 60, 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.
  • Fuel are fed into 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 ruling
  • the delivery rate of the high-pressure pump in the memory 30 can be variably adjusted. If a little
  • Fuel delivery is required so the inlet valve 34 by the Ak- tor 60 kept open during a large part of the delivery stroke of the pump piston 12 and when a large fuel delivery is required, the intake valve 34 is kept open only during a small part or not at all during the delivery stroke of the pump piston 12.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (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 d'électroaimant (68) agissant au moins indirectement sur l'élément de soupape (34), une bobine magnétique (64) entourant l'armature (68), et un noyau magnétique (66), sur lequel l'armature (68) vient au moins indirectement en appui lorsque la bobine magnétique (64) est alimentée, l'armature (68) étant guidée mobile dans un élément support (78), l'élément support (78) et le noyau magnétique (66) étant reliés l'un à l'autre et étant entouré d'un boîtier (69, 70, 71), et la zone d'assemblage (90) entre l'élément support (78) et le noyau magnétique (68) étant située dans un espace intérieur (91) du boîtier (69, 70, 71). Un joint d'étanchéité (92), placé entre l'élément support (78) et le boîtier (69, 70, 71), permet d'assurer l'étanchéité de l'espace intérieur (91) du boîtier (69, 70, 71) vis-à-vis de l'extérieur du boîtier (69, 70, 71).
PCT/EP2017/050060 2016-02-25 2017-01-03 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission WO2017144185A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016202945.2A DE102016202945A1 (de) 2016-02-25 2016-02-25 Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
DE102016202945.2 2016-02-25

Publications (1)

Publication Number Publication Date
WO2017144185A1 true WO2017144185A1 (fr) 2017-08-31

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PCT/EP2017/050060 WO2017144185A1 (fr) 2016-02-25 2017-01-03 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission

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DE (1) DE102016202945A1 (fr)
WO (1) WO2017144185A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110230563A (zh) * 2018-03-06 2019-09-13 罗伯特·博世有限公司 燃料高压泵
CN110805507A (zh) * 2018-08-06 2020-02-18 罗伯特·博世有限公司 用于低温燃料的燃料输送装置的阀装置和燃料输送装置
JP2020159357A (ja) * 2017-09-29 2020-10-01 株式会社デンソー 高圧ポンプ
US11525421B2 (en) 2017-09-29 2022-12-13 Denso Corporation High-pressure pump

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017217489A1 (de) * 2017-09-29 2019-04-04 Robert Bosch Gmbh Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
DE102019201932A1 (de) * 2019-02-14 2020-08-20 Robert Bosch Gmbh Elektrisch betätigtes Ventil, in einer Hochdruckpumpe eines Kraftstoffeinspritzsystems
DE102019130672A1 (de) * 2019-11-13 2021-06-17 Svm Schultz Verwaltungs-Gmbh & Co. Kg Elektromagnetventil und Verfahren zur Herstelllung eines Elektromagnetventils

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007013878A1 (de) * 2007-03-20 2008-10-02 Hydraulik-Ring Gmbh Elektrohydraulisches Ventil mit platzsparender Dichtung
EP2466107A1 (fr) * 2010-12-16 2012-06-20 Robert Bosch GmbH Injecteur de carburant comportant une soupape de commande à équilibrage de pression
DE102013220593A1 (de) 2013-10-11 2015-04-16 Robert Bosch Gmbh Elektromagnetisch ansteuerbares Saugventil
DE102014201101A1 (de) * 2014-01-22 2015-07-23 Robert Bosch Gmbh Elektromagnetisch ansteuerbares Saugventil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007013878A1 (de) * 2007-03-20 2008-10-02 Hydraulik-Ring Gmbh Elektrohydraulisches Ventil mit platzsparender Dichtung
EP2466107A1 (fr) * 2010-12-16 2012-06-20 Robert Bosch GmbH Injecteur de carburant comportant une soupape de commande à équilibrage de pression
DE102013220593A1 (de) 2013-10-11 2015-04-16 Robert Bosch Gmbh Elektromagnetisch ansteuerbares Saugventil
DE102014201101A1 (de) * 2014-01-22 2015-07-23 Robert Bosch Gmbh Elektromagnetisch ansteuerbares Saugventil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020159357A (ja) * 2017-09-29 2020-10-01 株式会社デンソー 高圧ポンプ
US11525421B2 (en) 2017-09-29 2022-12-13 Denso Corporation High-pressure pump
CN110230563A (zh) * 2018-03-06 2019-09-13 罗伯特·博世有限公司 燃料高压泵
CN110230563B (zh) * 2018-03-06 2023-03-07 罗伯特·博世有限公司 燃料高压泵
CN110805507A (zh) * 2018-08-06 2020-02-18 罗伯特·博世有限公司 用于低温燃料的燃料输送装置的阀装置和燃料输送装置

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Publication number Publication date
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