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WO2017108343A1 - 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
WO2017108343A1
WO2017108343A1 PCT/EP2016/079034 EP2016079034W WO2017108343A1 WO 2017108343 A1 WO2017108343 A1 WO 2017108343A1 EP 2016079034 W EP2016079034 W EP 2016079034W WO 2017108343 A1 WO2017108343 A1 WO 2017108343A1
Authority
WO
WIPO (PCT)
Prior art keywords
inlet valve
magnetic core
connecting element
armature
pump
Prior art date
Application number
PCT/EP2016/079034
Other languages
German (de)
English (en)
Inventor
Tobias Landenberger
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 WO2017108343A1 publication Critical patent/WO2017108343A1/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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0452—Distribution members, e.g. valves
    • F04B1/0461—Conical
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • 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
    • 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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0686—Braking, pressure equilibration, shock absorbing
    • F16K31/0696—Shock absorbing, e.g. using a dash-pot
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering

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. Between the armature and the magnetic core, 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. When the magnet armature is impacted on the magnet core, high loads of these two components can occur, which over a longer period of operation can lead to damage of the two components, as a result of which the functionality of the inlet valve can be impaired.
  • the inlet valve according to the invention with the features of claim 1 has the advantage that is damped by the elastic deformability of the connec tion elements of the stop of the armature at least indirectly on the magnetic core, so that the load on these two components is reduced and their possible operating time is extended.
  • 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 is a connecting element of an electromagnetic actuator of the inlet valve in a longitudinal section according to a first embodiment
  • Figure 4 the Connecting element in a longitudinal section according to a second embodiment.
  • FIG. 1 shows a detail of 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 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 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 holes 46, the other part open on the outside of the housing part 16.
  • the shaft 36 of the 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 52 of the housing part 16 surrounding the shaft 36 of the valve member 34.
  • Valve spring 50 the valve member 34 is acted upon in a direction of adjustment A in the closing direction, wherein the valve member 34 rests in its closed position with its sealing surface 42 on the valve seat 40.
  • the valve spring 50 is formed for example as a helical compression spring.
  • 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 an actuator housing 70 which can be fastened to the housing part 16 of the high-pressure pump.
  • the actuator housing 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 magnet armature 68 is at least substantially cylindrical in shape and is displaceably guided via its outer jacket in a bore 76 in a carrier element 78 arranged in the actuator housing 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 hform.
  • the magnetic core 66 is arranged in the actuator housing 70 on the side facing away from the housing part 16 of the support member 78 and has a cylindrical outer shape.
  • the magnet armature 68 has an at least approximately coaxial to the longitudinal axis 69 of the magnet armature 68 arranged central bore 80 into which a on the valve member 34 opposite side of the magnet armature 68 arranged return Stellfeder 82 protrudes, 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 element 85 can be inserted for the restoring 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 78 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 actuator 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 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 connecting element 90 in its central region 90c at least in sections in the direction of its longitudinal axis 91 is formed elastically deformable. This elastic deformability of the connecting element 90, the impact of the armature 68 is attenuated at the magnetic core 66, whereby the load on these components is reduced and their durability is improved.
  • the connecting element 90 has in its middle region 90c at least one peripheral bead 92, through which the elastic deformability is achieved. It is also possible for a plurality of beads 92 to follow one another in the axial direction.
  • 92 can be introduced, for example, by a rolling process in the connecting element 90.
  • the connecting element 90 has at least one annular insert 94 in its central region 90c, which consists of a material with higher elasticity than the material from which the remaining connecting element 90 consists.
  • at least one bead 92 may be provided in the middle region 90c of the connecting element 90, as in the first exemplary embodiment.
  • 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 solenoid 64 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 solenoid 64 is de-energized, the magnet armature 68 is pressed by the return spring 82 in the direction of adjustment according to arrow B in FIG. 2, wherein the valve member 34 is pressed by the magnet armature 68 against the armature 68
  • Valve spring 50 is pressed 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.
  • Solenoid 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 fuel is to be conveyed into the reservoir 30 during the delivery stroke of the pump piston 12, the magnetic coil 64 is energized, so that the magnet armature
  • 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)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (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 soupape (34) mobile entre une position d'ouverture et une position de fermeture. Un actionneur électromagnétique (60) permet le déplacement de l'élément soupape (34), l'actionneur électromagnétique (60) présentant une armature magnétique (68) agissant au moins indirectement sur l'élément 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 support (78) et l'élément support (78) et le noyau magnétique (66) étant reliés l'un à l'autre. L'élément support (78) et le noyau magnétique (66) sont reliés l'un à l'autre au moyen d'un élément de liaison en forme de douille (90) qui est élastiquement déformable, au moins par endroits, dans son axe longitudinal (91).
PCT/EP2016/079034 2015-12-21 2016-11-28 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission WO2017108343A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015226248.0A DE102015226248A1 (de) 2015-12-21 2015-12-21 Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
DE102015226248.0 2015-12-21

Publications (1)

Publication Number Publication Date
WO2017108343A1 true WO2017108343A1 (fr) 2017-06-29

Family

ID=57396477

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/079034 WO2017108343A1 (fr) 2015-12-21 2016-11-28 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission

Country Status (2)

Country Link
DE (1) DE102015226248A1 (fr)
WO (1) WO2017108343A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6708238B2 (ja) * 2017-09-29 2020-06-10 株式会社デンソー 高圧ポンプ

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1909361A1 (de) * 1969-02-25 1970-08-06 Herion Werke Kg Magnetventil fuer Wechselstrombetrieb
DE10212138A1 (de) * 2001-10-02 2003-04-17 Mitsubishi Electric Corp Kraftstoffversorgungsvorrichtung
JP2003314738A (ja) * 2002-04-23 2003-11-06 Bosch Automotive Systems Corp 流量制御弁
US20050073194A1 (en) * 2003-10-06 2005-04-07 Advics Co., Ltd. Brake fluid control device
DE102005061410A1 (de) * 2005-12-22 2007-06-28 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil
DE102011076784A1 (de) * 2011-05-31 2012-12-06 Continental Automotive Gmbh Einlassventil für eine Fluidpumpe und Montageverfahren für ein Einlassventil für eine Fluidpumpe
DE102013220593A1 (de) 2013-10-11 2015-04-16 Robert Bosch Gmbh Elektromagnetisch ansteuerbares Saugventil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1909361A1 (de) * 1969-02-25 1970-08-06 Herion Werke Kg Magnetventil fuer Wechselstrombetrieb
DE10212138A1 (de) * 2001-10-02 2003-04-17 Mitsubishi Electric Corp Kraftstoffversorgungsvorrichtung
JP2003314738A (ja) * 2002-04-23 2003-11-06 Bosch Automotive Systems Corp 流量制御弁
US20050073194A1 (en) * 2003-10-06 2005-04-07 Advics Co., Ltd. Brake fluid control device
DE102005061410A1 (de) * 2005-12-22 2007-06-28 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil
DE102011076784A1 (de) * 2011-05-31 2012-12-06 Continental Automotive Gmbh Einlassventil für eine Fluidpumpe und Montageverfahren für ein Einlassventil für eine Fluidpumpe
DE102013220593A1 (de) 2013-10-11 2015-04-16 Robert Bosch Gmbh Elektromagnetisch ansteuerbares Saugventil

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