EP3209878A1 - Suction valve that can be actuated electromagnetically, high-pressure pump having such a suction valve, and method for connecting such a suction valve to a housing part of a high-pressure pump - Google Patents

Suction valve that can be actuated electromagnetically, high-pressure pump having such a suction valve, and method for connecting such a suction valve to a housing part of a high-pressure pump

Info

Publication number
EP3209878A1
EP3209878A1 EP15767534.9A EP15767534A EP3209878A1 EP 3209878 A1 EP3209878 A1 EP 3209878A1 EP 15767534 A EP15767534 A EP 15767534A EP 3209878 A1 EP3209878 A1 EP 3209878A1
Authority
EP
European Patent Office
Prior art keywords
valve
armature
screw
suction valve
pressure 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.)
Withdrawn
Application number
EP15767534.9A
Other languages
German (de)
French (fr)
Inventor
Michael IMHOF
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3209878A1 publication Critical patent/EP3209878A1/en
Withdrawn legal-status Critical Current

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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F02M59/46—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
    • F02M59/44—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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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
    • F04B53/102—Disc valves
    • F04B53/1022—Disc valves having means for guiding the closure member axially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0076—Piston machines or pumps characterised by having positively-driven valving the members being actuated by electro-magnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws
    • 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
    • F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
    • F02M63/0022—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures the armature and the valve being allowed to move relatively to each other

Definitions

  • the invention relates to an electromagnetically operated suction valve for a high pressure pump in a fuel injection system, in particular a common rail injection system, with the features of the preamble of claim 1. Furthermore, the invention relates to a high pressure pump for a fuel injection system, in particular a common rail injection system, with such a suction valve. Furthermore, a method for connecting such a suction valve with a housing part of a high pressure pump is proposed.
  • High-pressure pumps in a fuel injection system serve to deliver fuel to high pressure.
  • a high-pressure pump has at least one pump element with a high-pressure element space, in which the fuel is compressed.
  • the fuel delivered for high pressure is then fed via a high-pressure outlet to a high-pressure accumulator, the so-called rail.
  • the filling of the high pressure element space is usually via a suction valve, which may be designed, for example, as an electromagnetically operable valve. This is controllable such that the high-pressure element space a defined amount of fuel is supplied.
  • a high pressure pump for a fuel injection system in particular a common rail injection system, with an electric romagnetisch controllable suction forth, which is accommodated in a hollow cylindrical projection of a cylinder head formed as a housing part of the high-pressure pump.
  • the suction valve comprises a valve plate with an axial bore, in which a valve closing element in the form of a valve stem is received in a liftable manner.
  • the valve closure member is connected to an armature surrounding a seat distal end of the valve closure member.
  • An on the one hand at the armature, on the other hand supported on the valve plate compression spring acts on the valve closure member with a closing force.
  • a magnetic coil which acts upon energization of the armature, so that it moves against the spring force of the compression spring and lifts the valve stem from the seat.
  • the stroke of the armature is limited by a paragraph of a valve screw, the fixing of the position of the valve plate in the
  • valve screw is screwed into the hollow cylindrical projection of the housing part of the high pressure pump and supported in the axial direction on the valve plate, so that an axial prestressing force is applied to the valve plate.
  • valve screw By applying the axial biasing force, the valve screw is subject to plastic deformation. This means that the valve screw is subjected to a setting process.
  • the set amount in turn has an influence on the stroke of the valve closing element or of the valve tappet and thus has an effect on the pressure supplied to the high pressure element space
  • the present invention seeks to provide an electromagnetically actuated suction valve with a valve screw for fixing in a housing part of a high-pressure pump, wherein the setting behavior of the valve screw has a significantly reduced or no influence on the stroke of the valve stem ,
  • the proposed electromagnetically actuated suction valve comprises a magnetic coil for acting on a liftable armature which can be coupled with a valve tappet, which is received in a liftable manner in an axial bore of a valve plate. Furthermore, the proposed suction valve comprises a valve screw for axially fixing the position of the valve plate in a housing part of the high-pressure pump. According to the invention, the valve screw is penetrated by an axial bore, via which the armature is guided so that it stops. This means that the valve screw itself does not form a stop for the armature. A limitation of the armature stroke is effected in the proposed suction valve by other, hereinafter described elements.
  • the axial bore of the valve screw for guiding the armature has a constant inner diameter.
  • the constant inner diameter of the axial bore of the valve screw allows the axial position of the armature to be set according to the respective requirements.
  • the constant inner diameter also simplifies the design of the valve screw, which is thus easier and less expensive to manufacture.
  • an end face of the valve plate facing the armature forms a stop surface serving as a lower stroke stop for the armature.
  • the stroke of the armature in the opening direction is therefore limited by the valve plate. Due to the coupling of the valve stem with the anchor, the same applies to the opening stroke of the valve stem.
  • the armature has a hollow cylindrical portion, which is further preferably designed to be flush on the outer peripheral side and has a valve plate facing annular end face which cooperates stop-forming with the stop surface of the valve plate.
  • the weight of the armature can be reduced over the hollow cylindrical portion, which is beneficial to the moving masses and thus affects the dynamics of the suction valve.
  • within the hollow cylindrical portion at least partially the valve stem and a spring acting on the valve stem in the closing direction can be accommodated.
  • an armature facing end surface of an axially applied to the valve plate spacer sleeve serving as a lower stroke stop for the anchor abutment surface forms.
  • the spacer sleeve also represents a simple and inexpensive to manufacture component that is customizable in terms of material and dimensions to the respective requirements. For example, a sintered material for forming the spacer sleeve can be selected to ensure a high strength of the stop surface to reduce wear in this area.
  • About the dimension of the spacer sleeve in the axial direction of the stroke stop can be set according to the respective requirements.
  • the spacer sleeve preferably has an outer diameter which substantially corresponds to the outer diameter of the armature. This means that the spacer sleeve is formed on the outer circumference flush with the anchor.
  • the outer diameter is preferably selected such that the spacer sleeve, which is received as the armature in the axial bore of the valve screw, in the axial direction relative to the valve screw is displaceable.
  • the axial displaceability of the spacer sleeve relative to the valve screw ensures that the setting behavior of the valve screw has no influence on the axial position of the spacer sleeve with respect to the valve plate.
  • a pole core which is accommodated in the magnet coil at least in regions, or a residual air gap disk supported thereon, forms a stop surface serving as an upper stroke stop for the armature.
  • the upper stroke stop of the anchor is specified.
  • the pole core is force, positively and / or materially connected to the valve screw.
  • a non-positive connection can be effected for example via a press connection. This is easy to manufacture and at the same time allows an adjustment of the total stroke of the anchor via the press-in depth.
  • a positive connection can be made in particular via a screw connection.
  • the polar body is preferably screwed into the valve screw for this purpose.
  • the total stroke of the armature can be adjusted via the screw-in depth.
  • a cohesive connection for example a welded connection, can be provided, which at the same time ensures a seal in the case of a circumferential weld seam.
  • a seal can also be effected via an adhesive connection, which can also be used as an alternative or in addition to the use.
  • the polar body connected to the valve screw only after completion of setting process. If the valve screw has been set, the setting amount can be compensated, for example, via the press-in or screw-in depth of the polar body within the valve screw.
  • the pole core is screwed via an external thread with an internal thread of the valve screw, wherein preferably the outer and the inner thread are formed as a fine thread.
  • a fine thread allows a very accurate adjustment of the axial position of the pole body with respect to the valve screw and thus the total stroke of the armature.
  • the armature has an anchor pin for mechanical coupling with the valve lifter.
  • the anchor pin can further reduce the moving masses become.
  • the anchor pin is preferably pressed into the armature, it being possible to influence the stroke of the valve tappet coupled to the armature via the press-in depth.
  • the armature is acted upon in the direction of the valve stem by the spring force of a compression spring.
  • the suction valve is thus preferably a normally open valve.
  • the solenoid To close the valve, the solenoid must be energized so that the armature moves against the spring force of the compression spring in the direction of the pole core to close a working air gap between the pole core and the armature.
  • the energization of the solenoid is terminated, so that the spring force of the compression spring returns the armature to its original position.
  • the valve tappet coupled to the armature is lifted out of its seat counter to the spring force of a further spring supported on the valve tappet.
  • the further proposed for a fuel injection system, in particular a common rail injection system, high-pressure pump with an electromagnetically actuated suction valve according to the invention comprises a housing part having a receiving bore in which the valve plate is inserted and axially biased in the direction of a paragraph.
  • the axial biasing force is effected via the valve screw, which is screwed into the receiving bore.
  • the valve screw is in this case axially supported on the valve plate, wherein it deforms plastically in the region of the support. That is, the valve screw is subject to a setting process, but due to the design of the suction valve according to the invention has no effect on the stroke of the armature and the valve tappet coupled to the armature. Consequently, the setting behavior of the valve screw also has no influence on the high pressure pump supplied amount of fuel.
  • the valve plate with preassembled valve stem is first inserted into a receiving bore of the housing part and axially biased by screwing the valve screw into the receiving bore in the direction of a shoulder of the housing part. Subsequently, the spacer sleeve and / or the armature is inserted into the axial bore of the valve screw. After completion of setting process the pole core is force, positively and / or cohesively connected to the valve screw. This ensures that the setting behavior of the valve screw also has no influence on the axial position of the upper stroke stop, which is formed by the pole core itself or a residual air gap disc supported thereon.
  • a connection of the pole core is effected with the valve screw by means of a screw or press connection, wherein preferably via the respective screwing or Einpresstiefe the total stroke of the armature is adjusted.
  • the total stroke of the armature is precisely adjustable in this way, as well as any component tolerances of the suction valve on the screw or Einpressianae be compensated.
  • a connection of the pole core with the valve screw is effected by means of an adhesive or welded connection. Because with a circumferential adhesive or weld seam can be effected at the same time a seal.
  • FIG. 1 shows a schematic longitudinal section through an inventive electromagnetically actuated suction valve according to a first preferred embodiment of the invention, attached to a high-pressure pump, and
  • Fig. 2 is a schematic longitudinal section through an inventive electromagnetically actuated suction valve according to a further preferred embodiment of the invention when attached to a high-pressure pump.
  • the electromagnetically actuated suction valve 1 shown schematically in FIG. 1 comprises an annular magnet coil 2, which at least partially a
  • Polkern 13 surrounds.
  • the magnetic coil 2 is surrounded by a pot-shaped housing 22, which is encapsulated to form an electrical connection 23 with a plastic material.
  • an armature 3 which is coupled with a liftable in an axial bore 5 of a valve plate 6 of the suction valve 1 valve stem 4.
  • the valve stem 4 opens directly into a high pressure element space 24 of a high pressure pump, to which the suction valve 1 is attached.
  • valve plate 6 including the valve stem 4 is inserted into a receiving bore 20 of a housing part 8 of the high-pressure pump and axially biased by means of a screwed into the receiving bore 20 valve screw 7 in the direction of a shoulder 21 of the housing part 8. Between the shoulder 21 and the valve plate 6 is still a spacer 25 is inserted, via which the axial position of the valve plate 6 with respect to the housing part 8 can be predetermined.
  • the valve screw 7 is penetrated by an axial bore 9, in which the armature 3 is not only received but also guided.
  • the inner diameter of the axial bore 9 is constant over the entire height of the valve screw 7. This makes it possible for an end face 10 of the valve plate 6 facing the armature 3 to serve as a lower stroke stop for the armature 3.
  • the armature 3 is designed in a hollow cylindrical in one of the end face 10 of the valve plate 6 facing end portion, which has a favorable effect on the moving masses.
  • the coupling with the valve stem 4 is realized via a radially inner, sleeve-shaped projection which surrounds a seat remote from the end of the valve stem 4.
  • the total stroke of the armature 3 is predetermined by an upper stroke stop.
  • the upper stroke stop is a stop face 15 which is formed on the pole core 13, which is accommodated at least in regions in the magnet coil 2 and is additionally screwed to the valve screw 7.
  • the screw connection is made via an external thread 16 of the pole core 13 and an internal thread 17 of the valve screw. acts, the threads are designed as a fine thread. In this way, the total stroke of the armature 3 can be set exactly.
  • suction valve 1 The operation of the suction valve 1 shown schematically in FIG. 1 is as follows:
  • FIG. 1 A further preferred embodiment of an electromagnetically actuated suction valve 1 according to the invention is shown in FIG.
  • a spacer sleeve 12 As a lower stroke stop.
  • the spacer sleeve 12 is axially supported on the end face 10 of the valve plate 6 and accommodated axially movably in the axial bore 9 of the valve screw 7, so that the setting behavior of the valve screw 7 has no influence on the axial position of the lower stroke stop.
  • a residual air gap disk 14 is arranged between the pole core 13 and the armature 3. Such can optionally also be arranged in the embodiment of FIG. 1.
  • the armature 3 in the embodiment of FIG. 2 is not only shorter, but also has an anchor pin 18 pressed into the armature 3 for coupling to the valve tappet 4, instead of a radially inner, sleeve-shaped projection.
  • the anchor 3 with the anchor pin 18 is particularly simple and inexpensive to produce due to the simple geometries.
  • valve part of the suction valve 1 is pre-assembled.
  • the valve stem 4 is inserted into the axial bore 5 of the valve plate 6 and countered with the spring 26 and a spring plate 28.
  • the preassembled valve plate 6 is inserted into a receiving bore 20 of the housing part 8. This is followed by the insertion and screwing of the valve screw 7 with the housing part 8, wherein the valve plate 6 in the direction of a shoulder 21 of the
  • Housing part 8 is axially biased.
  • the actuators are mounted.
  • the spacer sleeve 12 is inserted into the axial bore 9 of the valve screw 7.
  • the connection can be made for example by welding.
  • the axial position of the pole core 13 with respect to the valve screw 7 to be determined precisely, as this determines the total stroke of the armature 3.

Landscapes

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

Abstract

The invention relates to a suction valve (1) that can be actuated electromagnetically for a high-pressure pump in a fuel injection system, in particular a common rail injection system, comprising a solenoid (2) for acting on an armature (3), which can be moved in a reciprocating manner and which can be coupled to a valve tappet (4), which is accommodated in an axial bore (5) of a valve plate (6) in such a way that the valve tappet can be moved in a reciprocating manner, and also comprising a valve screw (7) for axially fixing the position of the valve plate (6) in a housing part (8) of the high-pressure pump. According to the invention, an axial bore (9) extends through the valve screw (7), by means of which axial bore the armature (3) is guided without stops. The invention further relates to a high-pressure pump for a fuel injection system, in particular a common rail injection system, comprising such a suction valve (1), and to a method for connecting such a suction valve (1) to a housing part (8) of a high-pressure pump.

Description

Beschreibung Titel  Description title
Elektromagnetisch betätigbares Saugventil, Hochdruckpumpe mit einem solchen Saugventil sowie Verfahren zur Verbindung eines solchen Saugventils mit einem Gehäuseteil einer Hochdruckpumpe  Electromagnetically operated suction valve, high-pressure pump with such a suction valve and method for connecting such a suction valve with a housing part of a high-pressure pump
Die Erfindung betrifft ein elektromagnetisch betätigbares Saugventil für eine Hochdruckpumpe in einem Kraftstoffeinspritzsystem, insbesondere einem Common-Rail- Einspritzsystem, mit den Merkmalen des Oberbegriffs des Anspruchs 1. Ferner betrifft die Erfindung eine Hochdruckpumpe für ein Kraftstoffeinspritzsystem, insbesondere ein Common- Rail-Einspritzsystem, mit einem solchen Saugventil. Des Weiteren wird ein Verfahren zur Verbindung eines solchen Saugventils mit einem Gehäuseteil einer Hochdruckpumpe vorgeschlagen. The invention relates to an electromagnetically operated suction valve for a high pressure pump in a fuel injection system, in particular a common rail injection system, with the features of the preamble of claim 1. Furthermore, the invention relates to a high pressure pump for a fuel injection system, in particular a common rail injection system, with such a suction valve. Furthermore, a method for connecting such a suction valve with a housing part of a high pressure pump is proposed.
Stand der Technik State of the art
Hochdruckpumpen in einem Kraftstoffeinspritzsystem dienen der Förderung von Kraftstoff auf Hochdruck. Hierzu weist eine Hochdruckpumpe mindestens ein Pumpenelement mit einem Hochdruck- Elementraum auf, in dem der Kraftstoff komprimiert wird. Der auf Hochdruck geförderte Kraftstoff wird anschließend über einen Hochdruckabgang einem Hochdruckspeicher, dem so genannten Rail, zugeführt. Die Befüllung des Hochdruck- Elementraums erfolgt in der Regel über ein Saugventil, das beispielsweise als elektromagnetisch betätigbares Ventil ausgelegt sein kann. Dieses ist derart ansteuerbar, dass dem Hochdruck- Elementraum eine definierte Kraftstoffmenge zugeführt wird. High-pressure pumps in a fuel injection system serve to deliver fuel to high pressure. For this purpose, a high-pressure pump has at least one pump element with a high-pressure element space, in which the fuel is compressed. The fuel delivered for high pressure is then fed via a high-pressure outlet to a high-pressure accumulator, the so-called rail. The filling of the high pressure element space is usually via a suction valve, which may be designed, for example, as an electromagnetically operable valve. This is controllable such that the high-pressure element space a defined amount of fuel is supplied.
Aus der DE 10 2012 224 439 AI geht beispielhaft eine Hochdruckpumpe für ein Kraftstoffeinspritzsystem, insbesondere ein Common- Rail-Einspritzsystem, mit einem elekt- romagnetisch ansteuerbaren Saugventil hervor, das in einem hohlzylinderförmigen Ansatz eines als Zylinderkopf ausgebildeten Gehäuseteils der Hochdruckpumpe aufgenommen ist. Das Saugventil umfasst eine Ventilplatte mit einer Axialbohrung, in der ein Ventilschließelement in Form eines Ventilstößels hubbeweglich aufgenommen ist. Das Ventilschließelement ist mit einem Anker verbunden, der ein sitzfernes Ende des Ventilschließelements umgibt. Eine einerseits am Anker, andererseits an der Ventilplatte abgestützte Druckfeder beaufschlagt das Ventilschließelement mit einer Schließkraft. Zum Öffnen des Saugventils ist eine Magnetspule vorgesehen, die bei Bestromung auf den Anker einwirkt, so dass dieser sich entgegen der Federkraft der Druckfeder bewegt und den Ventilstößel aus dem Sitz hebt. Der Hub des Ankers wird dabei von einem Absatz einer Ventilschraube begrenzt, die der Lagefixierung der Ventilplatte im From DE 10 2012 224 439 AI, a high pressure pump for a fuel injection system, in particular a common rail injection system, with an electric romagnetisch controllable suction forth, which is accommodated in a hollow cylindrical projection of a cylinder head formed as a housing part of the high-pressure pump. The suction valve comprises a valve plate with an axial bore, in which a valve closing element in the form of a valve stem is received in a liftable manner. The valve closure member is connected to an armature surrounding a seat distal end of the valve closure member. An on the one hand at the armature, on the other hand supported on the valve plate compression spring acts on the valve closure member with a closing force. To open the suction valve, a magnetic coil is provided, which acts upon energization of the armature, so that it moves against the spring force of the compression spring and lifts the valve stem from the seat. The stroke of the armature is limited by a paragraph of a valve screw, the fixing of the position of the valve plate in the
Gehäuseteil der Hochdruckpumpe dient. Die Ventilschraube ist hierzu in den hohlzylinderförmigen Ansatz des Gehäuseteils der Hochdruckpumpe eingeschraubt und in axialer Richtung an der Ventilplatte abgestützt, so dass auf die Ventilplatte eine axiale Vor- Spannkraft aufgebracht wird. Housing part of the high-pressure pump is used. For this purpose, the valve screw is screwed into the hollow cylindrical projection of the housing part of the high pressure pump and supported in the axial direction on the valve plate, so that an axial prestressing force is applied to the valve plate.
Mit Aufbringen der axialen Vorspannkraft unterliegt die Ventilschraube einer plastischen Verformung. Das heißt, dass die Ventilschraube einem Setzvorgang unterworfen ist. Der Setzbetrag hat wiederum Einfluss auf den Hub des Ventilschließelements bzw. des Ventilstößels und wirkt sich somit auf die dem Hochdruck- Elementraum zugeführteBy applying the axial biasing force, the valve screw is subject to plastic deformation. This means that the valve screw is subjected to a setting process. The set amount in turn has an influence on the stroke of the valve closing element or of the valve tappet and thus has an effect on the pressure supplied to the high pressure element space
Kraftstoffmenge aus. Dabei stellt das Setzverhalten der Ventilschraube eine stark schwankende und nicht voraussagbare Größe dar. Fuel quantity off. The setting behavior of the valve screw is a strongly fluctuating and unpredictable quantity.
Ausgehend von dem vorstehend genannten Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein elektromagnetisch betätigbares Saugventil mit einer Ventilschraube zur Fixierung in einem Gehäuseteil einer Hochdruckpumpe anzugeben, bei dem das Setzverhalten der Ventilschraube einen deutlich reduzierten oder keinen Einfluss auf den Hub des Ventilstößels hat. Zur Lösung der Aufgabe werden das elektromagnetisch betätigbare Saugventil mit denBased on the above-mentioned prior art, the present invention seeks to provide an electromagnetically actuated suction valve with a valve screw for fixing in a housing part of a high-pressure pump, wherein the setting behavior of the valve screw has a significantly reduced or no influence on the stroke of the valve stem , To solve the problem, the electromagnetically actuated suction valve with the
Merkmalen des Anspruchs 1 sowie eine Hochdruckpumpe mit einem solchen Saugventil vorgeschlagen. Darüber hinaus wird ein Verfahren zur Verbindung eines solchen Saugventils mit einem Gehäuseteil einer Hochdruckpumpe angegeben. Vorteilhafte Weiterbildungen der Erfindung sind den jeweiligen Unteransprüchen zu entnehmen. Offenbarung der Erfindung Characteristics of claim 1 and a high-pressure pump with such a suction valve proposed. In addition, a method for connecting such a suction valve with a housing part of a high pressure pump is specified. Advantageous developments of the invention can be found in the respective subclaims. Disclosure of the invention
Das vorgeschlagene elektromagnetisch betätigbare Saugventil umfasst eine Magnetspule zur Einwirkung auf einen hubbeweglichen Anker, der mit einem Ventilstößel koppelbar ist, der in einer Axialbohrung einer Ventilplatte hubbeweglich aufgenommen ist. Ferner umfasst das vorgeschlagene Saugventil eine Ventilschraube zur axialen Lagefixierung der Ventilplatte in einem Gehäuseteil der Hochdruckpumpe. Erfindungsgemäß ist die Ventilschraube von einer Axialbohrung durchsetzt, über welche der Anker anschlagfrei geführt ist. Das heißt, dass die Ventilschraube selbst keinen Anschlag für den Anker ausbildet. Eine Begrenzung des Ankerhubes wird bei dem vorgeschlagenen Saugventil durch andere, nachfolgend noch beschriebene Elemente bewirkt. Aufgrund der anschlagfreien Führung des Ankers innerhalb der Ventilschraube, übt das Setzverhalten der Ventilschraube keinen Einfluss auf den Hub des Ankers aus. Gleiches gilt somit auch für den Hub des Ventilstößels, der mit dem Anker koppelbar bzw. gekoppelt ist. Der Ankerhub ist somit vom Setzverhalten der Ventilschraube entkoppelt. The proposed electromagnetically actuated suction valve comprises a magnetic coil for acting on a liftable armature which can be coupled with a valve tappet, which is received in a liftable manner in an axial bore of a valve plate. Furthermore, the proposed suction valve comprises a valve screw for axially fixing the position of the valve plate in a housing part of the high-pressure pump. According to the invention, the valve screw is penetrated by an axial bore, via which the armature is guided so that it stops. This means that the valve screw itself does not form a stop for the armature. A limitation of the armature stroke is effected in the proposed suction valve by other, hereinafter described elements. Due to the non-stop guidance of the armature within the valve screw, the seating behavior of the valve screw exerts no influence on the stroke of the armature. The same therefore also applies to the stroke of the valve tappet, which can be coupled or coupled with the armature. The armature stroke is thus decoupled from the setting behavior of the valve screw.
Bevorzugt besitzt die Axialbohrung der Ventilschraube zur Führung des Ankers einen gleichbleibenden Innendurchmesser. Durch diese Maßnahme ist eine anschlagfreie Führung des Ankers über die Ventilschraube sichergestellt. Ferner ermöglicht der gleichbleibende Innendurchmesser der Axialbohrung der Ventilschraube die axiale Lage des Ankers den jeweiligen Erfordernissen entsprechend festzulegen. Der gleichbleibende Innendurchmesser vereinfacht zudem die Ausgestaltung der Ventilschraube, die somit einfacher und kostengünstiger zu fertigen ist. Preferably, the axial bore of the valve screw for guiding the armature has a constant inner diameter. By this measure, a stop-free guidance of the armature is ensured by the valve screw. Furthermore, the constant inner diameter of the axial bore of the valve screw allows the axial position of the armature to be set according to the respective requirements. The constant inner diameter also simplifies the design of the valve screw, which is thus easier and less expensive to manufacture.
Ferner bevorzugt bildet eine dem Anker zugewandte Stirnfläche der Ventilplatte eine als unterer Hubanschlag für den Anker dienende Anschlagfläche aus. Der Hub des Ankers in Öffnungsrichtung wird demnach durch die Ventilplatte begrenzt. Aufgrund der Kopplung des Ventilstößels mit dem Anker, gilt gleiches für den Öffnungshub des Ventilstößels. Vorzugsweise besitzt der Anker einen hohlzylinderförmigen Abschnitt, der weiterhin vorzugsweise außenumfangseitig bündig ausgebildet ist und eine der Ventilplatte zugewandte ringförmige Stirnfläche besitzt, die mit der Anschlagfläche der Ventilplatte anschlagbildend zusammenwirkt. Über den hohlzylinderförmigen Abschnitt kann zum Einen das Gewicht des Ankers reduziert werden, was sich günstig auf die bewegten Massen und damit auf die Dynamik des Saugventils auswirkt. Zum Anderen kann innerhalb des hohlzylinderförmigen Abschnitts zumindest bereichsweise der Ventilstößel sowie eine den Ventilstößel in Schließrichtung beaufschlagende Feder aufgenommen werden. Further preferably, an end face of the valve plate facing the armature forms a stop surface serving as a lower stroke stop for the armature. The stroke of the armature in the opening direction is therefore limited by the valve plate. Due to the coupling of the valve stem with the anchor, the same applies to the opening stroke of the valve stem. Preferably, the armature has a hollow cylindrical portion, which is further preferably designed to be flush on the outer peripheral side and has a valve plate facing annular end face which cooperates stop-forming with the stop surface of the valve plate. On the one hand, the weight of the armature can be reduced over the hollow cylindrical portion, which is beneficial to the moving masses and thus affects the dynamics of the suction valve. On the other hand, within the hollow cylindrical portion at least partially the valve stem and a spring acting on the valve stem in the closing direction can be accommodated.
Zur weiteren Reduzierung des Gewichts des Ankers wird vorgeschlagen, dass eine dem Anker zugewandte Stirnfläche einer axial an der Ventilplatte anliegenden Distanzhülse eine als unterer Hubanschlag für den Anker dienende Anschlagfläche ausbildet. Durch die Anordnung einer Distanzhülse zwischen der Ventilplatte und dem Anker, kann der Anker kürzer ausgebildet werden. Dies führt zu einer weiteren Optimierung der bewegten Massen. Die Distanzhülse stellt zudem ein einfach und kostengünstig herzustellendes Bauteil dar, das hinsichtlich Material und Abmessungen an die jeweiligen Erfordernisse anpassbar ist. Beispielsweise kann ein Sintermaterial zur Ausbildung der Distanzhülse gewählt werden, um eine hohe Festigkeit der Anschlagfläche zur Verringerung des Verschleißes in diesem Bereich zu gewährleisten. Über die Abmessung der Distanzhülse in axialer Richtung kann der Hubanschlag den jeweiligen Erfordernissen entsprechend festgelegt werden. To further reduce the weight of the armature is proposed that an armature facing end surface of an axially applied to the valve plate spacer sleeve serving as a lower stroke stop for the anchor abutment surface forms. By arranging a spacer sleeve between the valve plate and the armature, the anchor can be made shorter. This leads to a further optimization of the moving masses. The spacer sleeve also represents a simple and inexpensive to manufacture component that is customizable in terms of material and dimensions to the respective requirements. For example, a sintered material for forming the spacer sleeve can be selected to ensure a high strength of the stop surface to reduce wear in this area. About the dimension of the spacer sleeve in the axial direction of the stroke stop can be set according to the respective requirements.
Die Distanzhülse weist vorzugsweise einen Außendurchmesser auf, der im Wesentlichen dem Außendurchmesser des Ankers entspricht. Das heißt, dass die Distanzhülse außenumfangseitig bündig mit dem Anker ausgebildet ist. Dabei ist der Außendurchmesser bevorzugt derart gewählt, dass die Distanzhülse, die wie der Anker in der Axialbohrung der Ventilschraube aufgenommen ist, in axialer Richtung relativ zur Ventilschraube verschiebbar ist. Die axiale Verschiebbarkeit der Distanzhülse relativ zur Ventilschraube gewährleistet, dass das Setzverhalten der Ventilschraube keinen Ein- fluss auf die axiale Lage der Distanzhülse in Bezug auf die Ventilplatte hat. The spacer sleeve preferably has an outer diameter which substantially corresponds to the outer diameter of the armature. This means that the spacer sleeve is formed on the outer circumference flush with the anchor. In this case, the outer diameter is preferably selected such that the spacer sleeve, which is received as the armature in the axial bore of the valve screw, in the axial direction relative to the valve screw is displaceable. The axial displaceability of the spacer sleeve relative to the valve screw ensures that the setting behavior of the valve screw has no influence on the axial position of the spacer sleeve with respect to the valve plate.
Sowohl die Begrenzung des Ankerhubes unmittelbar über die Ventilplatte, als auch die Hubbegrenzung über die Distanzhülse weisen den Vorteil auf, dass nach Lagefixierung der Ventilplatte im Gehäuseteil der Hochdruckpumpe mittels der Ventilschraube die axiale Lage der Ventilplatte bzw. der hieran abgestützten Distanzhülse fest vorgegeben ist, und zwar unabhängig vom Setzverhalten der Ventilschraube. Das Setzverhalten der Ventilschraube hat demnach keinen Einfluss auf den unteren Hubanschlag des Ankers bzw. den Öffnungshub des mit dem Anker gekoppelten Ventilstößels. Gemäß einer bevorzugten Ausführungsform der Erfindung bildet ein zumindest bereichsweise in der Magnetspule aufgenommener Polkern oder eine hieran abgestützte Restluftspaltscheibe eine als oberer Hubanschlag für den Anker dienende Anschlagfläche aus. Über den Polkern bzw. die Restluftspaltscheibe ist demnach der obere Hubanschlag des Ankers vorgegeben. Both the limitation of the armature stroke directly over the valve plate, as well as the stroke limitation on the spacer sleeve have the advantage that after fixing the position of the valve plate in the housing part of the high-pressure pump by means of the valve screw, the axial position of the valve plate or the spacer sleeve supported thereon is fixed, and Although independent of the setting behavior of the valve screw. The setting behavior of the valve screw therefore has no influence on the lower stroke stop of the armature or the opening stroke of the valve tappet coupled to the armature. According to a preferred embodiment of the invention, a pole core, which is accommodated in the magnet coil at least in regions, or a residual air gap disk supported thereon, forms a stop surface serving as an upper stroke stop for the armature. About the pole core or the residual air gap disc, therefore, the upper stroke stop of the anchor is specified.
In Weiterbildung der Erfindung wird vorgeschlagen, dass der Polkern kraft, form- und/oder stoffschlüssig mit der Ventilschraube verbunden ist. Eine kraftschlüssige Verbindung kann beispielsweise über eine Pressverbindung bewirkt werden. Diese ist einfach herzustellen und ermöglicht zugleich über die Einpresstiefe eine Einstellung des Gesamthubes des Ankers. Eine formschlüssige Verbindung kann insbesondere über eine Schraubverbindung hergestellt werden. Der Polkörper wird hierzu bevorzugt in die Ventilschraube eingeschraubt. Über die Einschraubtiefe kann wiederum der Gesamthub des Ankers eingestellt werden. Alternativ oder ergänzend kann eine stoffschlüssige Verbindung, beispielsweise eine Schweißverbindung, vorgesehen werden, die bei umlaufender Schweißnaht zugleich eine Abdichtung gewährleistet. Eine Abdichtung kann ferner über eine Klebeverbindung bewirkt werden, die ebenfalls alternativ oder ergänzend zum Einsatz gelangen kann. In a further development of the invention it is proposed that the pole core is force, positively and / or materially connected to the valve screw. A non-positive connection can be effected for example via a press connection. This is easy to manufacture and at the same time allows an adjustment of the total stroke of the anchor via the press-in depth. A positive connection can be made in particular via a screw connection. The polar body is preferably screwed into the valve screw for this purpose. On the other hand, the total stroke of the armature can be adjusted via the screw-in depth. Alternatively or additionally, a cohesive connection, for example a welded connection, can be provided, which at the same time ensures a seal in the case of a circumferential weld seam. A seal can also be effected via an adhesive connection, which can also be used as an alternative or in addition to the use.
Um zu verhindern, dass das Setzverhalten der Ventilschraube Einfluss auf die Lage des oberen Hubanschlags hat, wird vorgeschlagen, dass der Polkörper erst nach abgeschlossenem Setzvorgang mit der Ventilschraube verbunden. Hat sich die Ventilschraube gesetzt, kann ein Ausgleich des Setzbetrages beispielsweise über die Ein- press- oder Einschraubtiefe des Polkörpers innerhalb der Ventilschraube erfolgen. In order to prevent the setting behavior of the valve screw has influence on the position of the upper stroke stop, it is proposed that the polar body connected to the valve screw only after completion of setting process. If the valve screw has been set, the setting amount can be compensated, for example, via the press-in or screw-in depth of the polar body within the valve screw.
Gemäß einer bevorzugten Ausführungsform der Erfindung ist der Polkern über ein Außengewinde mit einem Innengewinde der Ventilschraube verschraubt, wobei vorzugsweise das Außen- und das Innengewinde als Feingewinde ausgebildet sind. Ein Feingewinde ermöglicht eine sehr genaue Einstellung der axialen Lage des Polkörpers in Bezug auf die Ventilschraube und damit des Gesamthubes des Ankers. According to a preferred embodiment of the invention, the pole core is screwed via an external thread with an internal thread of the valve screw, wherein preferably the outer and the inner thread are formed as a fine thread. A fine thread allows a very accurate adjustment of the axial position of the pole body with respect to the valve screw and thus the total stroke of the armature.
Vorteilhafterweise besitzt der Anker einen Ankerstift zur mechanischen Kopplung mit dem Ventilstößel. Durch den Ankerstift können die bewegten Massen weiter reduziert werden. Der Ankerstift ist vorzugsweise in den Anker eingepresst, wobei über die Einpresstiefe Einfluss auf den Hub des mit dem Anker gekoppelten Ventilstößels genommen werden kann. Advantageously, the armature has an anchor pin for mechanical coupling with the valve lifter. The anchor pin can further reduce the moving masses become. The anchor pin is preferably pressed into the armature, it being possible to influence the stroke of the valve tappet coupled to the armature via the press-in depth.
Des Weiteren bevorzugt ist der Anker in Richtung des Ventilstößels von der Federkraft einer Druckfeder beaufschlagt. Bei dem Saugventil handelt es sich somit bevorzugt um ein stromlos offenes Ventil. Um das Ventil zu schließen, muss die Magnetspule bestromt werden, so dass sich der Anker entgegen der Federkraft der Druckfeder in Richtung des Polkerns bewegt, um einen Arbeitsluftspalt zwischen dem Polkern und dem Anker zu schließen. Zum Öffnen des Ventils wird die Bestromung der Magnetspule beendet, so dass die Federkraft der Druckfeder den Anker in seine Ausgangslage zurückstellt. Der mit dem Anker gekoppelte Ventilstößel wird dabei entgegen der Federkraft einer weiteren, am Ventilstößel abgestützten Feder, aus seinem Sitz gehoben. Further preferably, the armature is acted upon in the direction of the valve stem by the spring force of a compression spring. The suction valve is thus preferably a normally open valve. To close the valve, the solenoid must be energized so that the armature moves against the spring force of the compression spring in the direction of the pole core to close a working air gap between the pole core and the armature. To open the valve, the energization of the solenoid is terminated, so that the spring force of the compression spring returns the armature to its original position. The valve tappet coupled to the armature is lifted out of its seat counter to the spring force of a further spring supported on the valve tappet.
Die ferner für ein Kraftstoffeinspritzsystem, insbesondere ein Common- Rail- Einspritzsystem, vorgeschlagene Hochdruckpumpe mit einem erfindungsgemäßen elektromagnetisch betätigbaren Saugventil umfasst ein Gehäuseteil mit einer Aufnahmebohrung, in welcher die Ventilplatte eingesetzt und in Richtung eines Absatzes axial vorgespannt ist. Die axiale Vorspannkraft wird dabei über die Ventilschraube bewirkt, die in die Aufnahmebohrung eingeschraubt ist. Die Ventilschraube ist hierbei an der Ventilplatte axial abgestützt, wobei sie sich im Bereich der Abstützung plastisch verformt. Das heißt, dass die Ventilschraube einem Setzvorgang unterliegt, der jedoch aufgrund der Ausgestaltung des erfindungsgemäßen Saugventils keinen Einfluss auf den Hub des Ankers und des mit dem Anker gekoppelten Ventilstößels hat. Demzufolge hat das Setzverhalten der Ventilschraube auch keinen Einfluss auf die der Hochdruckpumpe zugeführte Kraftstoffmenge. The further proposed for a fuel injection system, in particular a common rail injection system, high-pressure pump with an electromagnetically actuated suction valve according to the invention comprises a housing part having a receiving bore in which the valve plate is inserted and axially biased in the direction of a paragraph. The axial biasing force is effected via the valve screw, which is screwed into the receiving bore. The valve screw is in this case axially supported on the valve plate, wherein it deforms plastically in the region of the support. That is, the valve screw is subject to a setting process, but due to the design of the suction valve according to the invention has no effect on the stroke of the armature and the valve tappet coupled to the armature. Consequently, the setting behavior of the valve screw also has no influence on the high pressure pump supplied amount of fuel.
Bei dem darüber hinaus vorgeschlagenen Verfahren zur Verbindung eines erfindungsgemäßen elektromagnetisch betätigbaren Saugventils mit einem Gehäuseteil einer Hochdruckpumpe wird zunächst die Ventilplatte mit vormontiertem Ventilstößel in eine Aufnahmebohrung des Gehäuseteils eingesetzt und mittels Einschrauben der Ventilschraube in die Aufnahmebohrung in Richtung eines Absatzes des Gehäuseteils axial vorgespannt. Anschließend wird bzw. werden die Distanzhülse und/oder der Anker in die Axialbohrung der Ventilschraube eingesetzt. Nach abgeschlossenem Setzvorgang wird der Polkern kraft, form- und/oder stoffschlüssig mit der Ventilschraube verbunden. Dadurch ist sichergestellt, dass das Setzverhalten der Ventilschraube auch keinen Ein- fluss auf die axiale Lage des oberen Hubanschlags hat, der durch den Polkern selbst oder einer hieran abgestützten Restluftspaltscheibe gebildet wird. In the additionally proposed method for connecting an electromagnetically actuated suction valve according to the invention with a housing part of a high-pressure pump, the valve plate with preassembled valve stem is first inserted into a receiving bore of the housing part and axially biased by screwing the valve screw into the receiving bore in the direction of a shoulder of the housing part. Subsequently, the spacer sleeve and / or the armature is inserted into the axial bore of the valve screw. After completion of setting process the pole core is force, positively and / or cohesively connected to the valve screw. This ensures that the setting behavior of the valve screw also has no influence on the axial position of the upper stroke stop, which is formed by the pole core itself or a residual air gap disc supported thereon.
Bevorzugt wird eine Verbindung des Polkerns mit der Ventilschraube mittels einer Schraub- oder Pressverbindung bewirkt, wobei vorzugsweise über die jeweilige Einschraub- bzw. Einpresstiefe der Gesamthub des Ankers eingestellt wird. Der Gesamthub des Ankers ist auf diese Weise präzise einstellbar, da auch etwaige Bauteiltoleranzen des Saugventils über die Einschraub- bzw. Einpresstiefe ausgleichbar sind. Preferably, a connection of the pole core is effected with the valve screw by means of a screw or press connection, wherein preferably via the respective screwing or Einpresstiefe the total stroke of the armature is adjusted. The total stroke of the armature is precisely adjustable in this way, as well as any component tolerances of the suction valve on the screw or Einpresstiefe be compensated.
Ferner bevorzugt wird alternativ oder ergänzend eine Verbindung des Polkerns mit der Ventilschraube mittels einer Klebe- oder Schweißverbindung bewirkt. Denn bei einer umlaufenden Klebe- oder Schweißnaht kann zugleich eine Abdichtung bewirkt werden. Further preferably, alternatively or additionally, a connection of the pole core with the valve screw is effected by means of an adhesive or welded connection. Because with a circumferential adhesive or weld seam can be effected at the same time a seal.
Bevorzugte Ausführungsformen der Erfindung werden nachfolgend anhand der beigefügten Zeichnungen näher beschrieben. Diese zeigen: Preferred embodiments of the invention are described below with reference to the accompanying drawings. These show:
Fig. 1 einen schematischen Längsschnitt durch ein erfindungsgemäßes elektromagnetisch betätigbares Saugventil gemäß einer ersten bevorzugten Ausführungsform der Erfindung, angebaut an eine Hochdruckpumpe, und 1 shows a schematic longitudinal section through an inventive electromagnetically actuated suction valve according to a first preferred embodiment of the invention, attached to a high-pressure pump, and
Fig. 2 einen schematischen Längsschnitt durch ein erfindungsgemäßes elektromagnetisch betätigbares Saugventil gemäß einer weiteren bevorzugten Ausführungsform der Erfindung beim Anbau an eine Hochdruckpumpe. Fig. 2 is a schematic longitudinal section through an inventive electromagnetically actuated suction valve according to a further preferred embodiment of the invention when attached to a high-pressure pump.
Ausführliche Beschreibung der Zeichnungen Detailed description of the drawings
Das in der Fig. 1 schematisch dargestellte elektromagnetisch betätigbare Saugventil 1 umfasst eine ringförmige Magnetspule 2, die zumindest bereichsweise einen The electromagnetically actuated suction valve 1 shown schematically in FIG. 1 comprises an annular magnet coil 2, which at least partially a
Polkern 13 umgibt. Außenumfangseitig ist die Magnetspule 2 von einem topfförmigen Gehäuse 22 umgeben, das zur Ausbildung eines elektrischen Anschlusses 23 mit einem Kunststoffmaterial umspritzt ist. Mittels der Magnetspule 2 kann auf einen Anker 3 eingewirkt werden, der mit einem in einer Axialbohrung 5 einer Ventilplatte 6 des Saugventils 1 hubbeweglich aufgenommen Ventilstößel 4 koppelbar ist. Der Ventilstößel 4 öffnet unmittelbar in einen Hochdruck-Elementraum 24 einer Hochdruckpumpe, an welcher das Saugventil 1 angebaut ist. Hierzu ist die Ventilplatte 6 einschließlich des Ventilstößels 4 in eine Aufnahmebohrung 20 eines Gehäuseteils 8 der Hochdruckpumpe eingesetzt und mittels einer in die Aufnahmebohrung 20 eingeschraubten Ventilschraube 7 in Richtung eines Absatzes 21 des Gehäuseteils 8 axial vorgespannt. Zwischen dem Absatz 21 und der Ventilplatte 6 ist noch eine Distanzscheibe 25 eingelegt, über welche die axiale Lage der Ventilplatte 6 in Bezug auf das Gehäuseteil 8 vorgebbar ist. Polkern 13 surrounds. On the outer circumference side, the magnetic coil 2 is surrounded by a pot-shaped housing 22, which is encapsulated to form an electrical connection 23 with a plastic material. By means of the magnetic coil 2 can be acted upon by an armature 3, which is coupled with a liftable in an axial bore 5 of a valve plate 6 of the suction valve 1 valve stem 4. The valve stem 4 opens directly into a high pressure element space 24 of a high pressure pump, to which the suction valve 1 is attached. For this purpose, the valve plate 6 including the valve stem 4 is inserted into a receiving bore 20 of a housing part 8 of the high-pressure pump and axially biased by means of a screwed into the receiving bore 20 valve screw 7 in the direction of a shoulder 21 of the housing part 8. Between the shoulder 21 and the valve plate 6 is still a spacer 25 is inserted, via which the axial position of the valve plate 6 with respect to the housing part 8 can be predetermined.
Die Ventilschraube 7 wird von einer Axialbohrung 9 durchsetzt, in welcher der Anker 3 nicht nur aufgenommen, sondern ferner geführt ist. Der Innendurchmesser der Axialbohrung 9 ist dabei über die gesamte Höhe der Ventilschraube 7 gleich bleibend. Dies ermöglicht es, dass eine dem Anker 3 zugewandte Stirnfläche 10 der Ventilplatte 6 als unterer Hubanschlag für den Anker 3 dienen kann. Der Anker 3 ist in einem der Stirnfläche 10 der Ventilplatte 6 zugewandten Endabschnitt hohlzylinderförmig ausgeführt, was sich günstig auf die bewegten Massen auswirkt. Die Kopplung mit dem Ventilstößel 4 wird über einen radial innen liegenden, hülsenförmigen Ansatz realisiert, der ein sitzfernes Ende des Ventilstößels 4 umgibt. The valve screw 7 is penetrated by an axial bore 9, in which the armature 3 is not only received but also guided. The inner diameter of the axial bore 9 is constant over the entire height of the valve screw 7. This makes it possible for an end face 10 of the valve plate 6 facing the armature 3 to serve as a lower stroke stop for the armature 3. The armature 3 is designed in a hollow cylindrical in one of the end face 10 of the valve plate 6 facing end portion, which has a favorable effect on the moving masses. The coupling with the valve stem 4 is realized via a radially inner, sleeve-shaped projection which surrounds a seat remote from the end of the valve stem 4.
Die Nutzung der Stirnfläche 10 der Ventilplatte 6 als unterer Hubanschlag für den Anker 3 besitzt den Vorteil, dass das Setzverhalten der Ventilschraube 7, mittels welcher die Ventilplatte 6 in Richtung des Absatzes 21 axial vorgespannt ist, keinen Einfluss auf den Hub des Ankers 3 bzw. des mit dem Anker 3 gekoppelten Ventilstößels 4 hat. Dadurch ist sichergestellt, dass dem Hochdruck- Elementraum 24 der Hochdruckpumpe eine definierte Kraftstoffmenge zugeführt wird. The use of the end face 10 of the valve plate 6 as a lower stroke stop for the armature 3 has the advantage that the setting behavior of the valve screw 7, by means of which the valve plate 6 is axially biased in the direction of paragraph 21, no effect on the stroke of the armature 3 and of the coupled with the armature 3 valve stem 4 has. This ensures that the high-pressure element space 24 of the high-pressure pump, a defined amount of fuel is supplied.
Der Gesamthub des Ankers 3 ist durch einen oberen Hubanschlag vorgegeben. Als oberer Hubanschlag dient vorliegend eine Anschlagfläche 15, die an dem Polkern 13 ausgebildet ist, der zumindest bereichsweise in der Magnetspule 2 aufgenommen und zudem mit der Ventilschraube 7 verschraubt ist. Die Verschraubung wird über ein Außengewinde 16 des Polkerns 13 und einem Innengewinde 17 der Ventilschraube be- wirkt, wobei die Gewinde als Feingewinde ausgelegt sind. Auf diese Weise lässt sich der Gesamthub des Ankers 3 genau festlegen. The total stroke of the armature 3 is predetermined by an upper stroke stop. In the present case, the upper stroke stop is a stop face 15 which is formed on the pole core 13, which is accommodated at least in regions in the magnet coil 2 and is additionally screwed to the valve screw 7. The screw connection is made via an external thread 16 of the pole core 13 and an internal thread 17 of the valve screw. acts, the threads are designed as a fine thread. In this way, the total stroke of the armature 3 can be set exactly.
Die Funktionsweise des in der Fig. 1 schematisch dargestellten Saugventils 1 ist wie folgt: The operation of the suction valve 1 shown schematically in FIG. 1 is as follows:
Wird die Magnetspule 2 bestromt, baut sich ein Magnetfeld auf, dessen Magnetkraft den Anker 3 entgegen der Federkraft einer Druckfeder 19 in Richtung des Polkerns 13 bewegt. Der Ventilstößel 4 wird dabei entlastet, so dass eine am Ventilstößel 4 abge- stützte weitere Feder 26 den Ventilstößel 4 in einen Ventilsitz 27 zieht und das Saugventil 1 schließt. Zum Öffnen des Saugventils 1 wird die Bestromung der Magnetspule 2 beendet. Der Anker 3 wird über die Federkraft der Druckfeder 19 in seine Ausganglage zurückgestellt, wobei er den Ventilstößel 4 aus dem Ventilsitz 27 hebt. Eine weitere bevorzugte Ausführungsform eines erfindungsgemäßen elektromagnetisch betätigbaren Saugventils 1 ist in der Fig. 2 dargestellt. Hier dient eine Stirnfläche 11 einer Distanzhülse 12 als unterer Hubanschlag. Die Distanzhülse 12 ist an der Stirnfläche 10 der Ventilplatte 6 axial abgestützt und axial beweglich in der Axialbohrung 9 der Ventilschraube 7 aufgenommen, so dass das Setzverhalten der Ventil- schraube 7 keinen Einfluss auf die axiale Lage des unteren Hubanschlags hat. Durch die Anordnung einer Distanzhülse 12 zwischen dem Anker 3 und der Ventilplatte 6 kann der Anker 3 verkürzt werden, was eine Reduzierung der bewegten Masse zur Folge hat, welche die Dynamik des Saugventils 1 verbessert. Um ein hydraulisches und/oder magnetisches Kleben des Ankers 3 am Polkern 13 beim Schließen des Saugventils 1 zu verhindern, ist zwischen dem Polkern 13 und dem Anker 3 eine Restluftspaltscheibe 14 angeordnet. Eine solche kann optional auch bei der Ausführungsform der Fig. 1 angeordnet werden. When the magnetic coil 2 is energized, a magnetic field builds up whose magnetic force moves the armature 3 counter to the spring force of a compression spring 19 in the direction of the pole core 13. The valve stem 4 is thereby relieved, so that a further spring 26 supported on the valve stem 4 pulls the valve stem 4 into a valve seat 27 and closes the suction valve 1. To open the suction valve 1, the energization of the solenoid coil 2 is stopped. The armature 3 is returned by the spring force of the compression spring 19 in its initial position, wherein it lifts the valve stem 4 from the valve seat 27. A further preferred embodiment of an electromagnetically actuated suction valve 1 according to the invention is shown in FIG. Here is an end face 11 of a spacer sleeve 12 as a lower stroke stop. The spacer sleeve 12 is axially supported on the end face 10 of the valve plate 6 and accommodated axially movably in the axial bore 9 of the valve screw 7, so that the setting behavior of the valve screw 7 has no influence on the axial position of the lower stroke stop. By arranging a spacer sleeve 12 between the armature 3 and the valve plate 6, the armature 3 can be shortened, resulting in a reduction of the moving mass, which improves the dynamics of the suction valve 1. In order to prevent a hydraulic and / or magnetic bonding of the armature 3 to the pole core 13 when closing the suction valve 1, a residual air gap disk 14 is arranged between the pole core 13 and the armature 3. Such can optionally also be arranged in the embodiment of FIG. 1.
Der Anker 3 bei der Ausführungsform der Fig. 2 ist nicht nur kürzer ausgebildet, son- dern weist ferner anstelle eines radial innen liegenden, hülsenförmigen Ansatzes einen in den Anker 3 eingepressten Ankerstift 18 zur Kopplung mit dem Ventilstößel 4 auf. Der Anker 3 mit dem Ankerstift 18 ist aufgrund der einfachen Geometrien besonders einfach und kostengünstig herzustellen. Anhand der Ausführungsform der Fig. 2 soll nunmehr das erfindungsgemäße Verfahren zur Verbindung eines erfindungsgemäßen Saugventils 1 mit einem Gehäuseteils 8 einer Hochdruckpumpe beschrieben werden. The armature 3 in the embodiment of FIG. 2 is not only shorter, but also has an anchor pin 18 pressed into the armature 3 for coupling to the valve tappet 4, instead of a radially inner, sleeve-shaped projection. The anchor 3 with the anchor pin 18 is particularly simple and inexpensive to produce due to the simple geometries. Based on the embodiment of FIG. 2, the method according to the invention for connecting a suction valve 1 according to the invention to a housing part 8 of a high-pressure pump will now be described.
Zunächst wird der Ventilteil des Saugventils 1 vormontiert. Hierzu wird der Ventilstößel 4 in die Axialbohrung 5 der Ventilplatte 6 eingesetzt und mit der Feder 26 und einem Federteller 28 gekontert. Anschließend wird nach Einlegen einer Distanzscheibe 25 die vormontierte Ventilplatte 6 in eine Aufnahmebohrung 20 des Gehäuseteils 8 eingesetzt. Hierauf folgt das Einsetzen und Verschrauben der Ventilschraube 7 mit dem Gehäuseteil 8, wobei die Ventilplatte 6 in Richtung eines Absatzes 21 des First, the valve part of the suction valve 1 is pre-assembled. For this purpose, the valve stem 4 is inserted into the axial bore 5 of the valve plate 6 and countered with the spring 26 and a spring plate 28. Subsequently, after inserting a spacer 25, the preassembled valve plate 6 is inserted into a receiving bore 20 of the housing part 8. This is followed by the insertion and screwing of the valve screw 7 with the housing part 8, wherein the valve plate 6 in the direction of a shoulder 21 of the
Gehäuseteils 8 axial vorgespannt wird. Housing part 8 is axially biased.
Nach abgeschlossenem Setzvorgang wird die Aktorik montiert. Hierzu wird zunächst die Distanzhülse 12 in die Axialbohrung 9 der Ventilschraube 7 eingesetzt. Darauf folgt das Einsetzen des Ankers 3. Nach Einlegen der Restluftspaltscheibe 14 und der Druckfeder 19 wird der Polkern 13 eingesetzt und mit der Ventilschraube 7 verbunden. Die Verbindung kann beispielsweise mittels Verschweißen erfolgen. Zuvor ist die axiale Lage des Polkerns 13 in Bezug auf die Ventilschraube 7 genau festzulegen, da diese den Gesamthub des Ankers 3 bestimmt. Hierzu kann es von Vorteil sein, dass ergänzend zur Schweißverbindung eine Schraub- oder Pressverbindung vorgesehen ist, die der Schweißverbindung vorausgeht. Denn über die Einschraub- oder Einpresstiefe kann der Gesamthub des Ankers 3 besonders genau festgelegt werden. Die anschließende Schweißverbindung dient dann vorrangig der Abdichtung. After completion of the setting process, the actuators are mounted. For this purpose, first the spacer sleeve 12 is inserted into the axial bore 9 of the valve screw 7. This is followed by the insertion of the armature 3. After inserting the residual air gap disc 14 and the compression spring 19 of the pole core 13 is inserted and connected to the valve screw 7. The connection can be made for example by welding. Previously, the axial position of the pole core 13 with respect to the valve screw 7 to be determined precisely, as this determines the total stroke of the armature 3. For this purpose, it may be advantageous that in addition to the welded connection a screw or press connection is provided, which precedes the welded joint. Because on the Einschraub- or Einpresstiefe the total stroke of the armature 3 can be set very precisely. The subsequent weld is then primarily the seal.
In der Fig. 2 nicht dargestellt ist die in dem topfförmigen Gehäuse 22 aufgenommene Magnetspule 2, die zur Fertigstellung der Montage abschließend auf den Polkern 13 aufgesetzt wird. Not shown in Fig. 2, the recorded in the cup-shaped housing 22 magnetic coil 2, which is finally placed on the pole core 13 to complete the assembly.

Claims

Ansprüche claims
1. Elektromagnetisch betätigbares Saugventil (1) für eine Hochdruckpumpe in einem Kraftstoffeinspritzsystem, insbesondere einem Common- Rail- Einspritzsystem, umfassend eine Magnetspule (2) zur Einwirkung auf einen hubbeweglichen Anker (3), der mit einem Ventilstößel (4) koppelbar ist, der in einer Axialbohrung (5) einer Ventilplatte (6) hubbeweglich aufgenommen ist, ferner umfassend eine Ventilschraube (7) zur axialen Lagefixierung der Ventilplatte (6) in einem Gehäuseteil (8) der Hochdruckpumpe, dadurch gekennzeichnet, dass die Ventilschraube (7) von einer Axialbohrung (9) durchsetzt ist, über welche der Anker (3) anschlagfrei geführt ist. 1. Electromagnetically actuated suction valve (1) for a high-pressure pump in a fuel injection system, in particular a common rail injection system, comprising a magnetic coil (2) for acting on a liftable armature (3) which is coupled to a valve stem (4), the in an axial bore (5) of a valve plate (6) is received liftable, further comprising a valve screw (7) for axially fixing the position of the valve plate (6) in a housing part (8) of the high-pressure pump, characterized in that the valve screw (7) of a Axial bore (9) is interspersed, over which the armature (3) is guided stop.
2. Saugventil nach Anspruch 1, 2. Suction valve according to claim 1,
dadurch gekennzeichnet, dass die Axialbohrung (9) der Ventilschraube (7) zur Führung des Ankers (3) einen gleichbleibenden Innendurchmesser besitzt. characterized in that the axial bore (9) of the valve screw (7) for guiding the armature (3) has a constant inner diameter.
3. Saugventil nach Anspruch 1 oder 2, 3. Suction valve according to claim 1 or 2,
dadurch gekennzeichnet, dass eine dem Anker (3) zugewandte Stirnfläche (10) der Ventilplatte (6) eine als unterer Hubanschlag für den Anker (3) dienende Anschlagfläche ausbildet. characterized in that an armature (3) facing end face (10) of the valve plate (6) as a lower stroke stop for the armature (3) serving abutment surface.
4. Saugventil nach Anspruch 1 oder 2, 4. Suction valve according to claim 1 or 2,
dadurch gekennzeichnet, dass eine dem Anker (3) zugewandte Stirnfläche (11) einer axial an der Ventilplatte (6) anliegenden Distanzhülse (12) eine als unterer Hubanschlag für den Anker (3) dienende Anschlagfläche ausbildet. characterized in that an armature (3) facing end face (11) of an axially on the valve plate (6) adjacent spacer sleeve (12) as a lower stroke stop for the armature (3) serving abutment surface.
5. Saugventil nach einem der vorhergehenden Ansprüche, 5. Suction valve according to one of the preceding claims,
dadurch gekennzeichnet, dass ein zumindest bereichsweise in der Magnetspule (2) aufgenommener Polkern (13) oder eine hieran abgestützte Restluftspaltscheibe (14) eine als oberer Hubanschlag für den Anker (3) dienende Anschlagfläche (15) ausbildet. characterized in that an at least partially in the magnetic coil (2) recorded pole core (13) or a supported thereon residual air gap disc (14) as an upper stroke stop for the armature (3) serving abutment surface (15).
6. Saugventil nach Anspruch 5, 6. Suction valve according to claim 5,
dadurch gekennzeichnet, dass der Polkern (13) kraft, form- und/oder stoffschlüssig mit der Ventilschraube (7) verbunden ist. characterized in that the pole core (13) is positively, positively and / or materially connected to the valve screw (7).
7. Saugventil nach Anspruch 5 oder 6, 7. Suction valve according to claim 5 or 6,
dadurch gekennzeichnet, dass der Polkern (13) über ein Außengewinde (16) mit einem Innengewinde (17) der Ventilschraube (7) verschraubt ist, wobei vorzugsweise das Außen- und das Innengewinde (16, 17) als Feingewinde ausgebildet sind. characterized in that the pole core (13) via an external thread (16) with an internal thread (17) of the valve screw (7) is screwed, wherein preferably the outer and the inner thread (16, 17) are formed as a fine thread.
8. Saugventil nach einem der vorhergehenden Ansprüche, 8. Suction valve according to one of the preceding claims,
dadurch gekennzeichnet, dass der Anker (3) einen Ankerstift (18) zur mechanischen Kopplung mit dem Ventilstößel (4) besitzt und/oder in Richtung des Ventilstößels (4) von der Federkraft einer Druckfeder (19) beaufschlagt ist. characterized in that the armature (3) has an anchor pin (18) for mechanical coupling with the valve stem (4) and / or in the direction of the valve stem (4) by the spring force of a compression spring (19) is acted upon.
9. Hochdruckpumpe für ein Kraftstoffeinspritzsystem, insbesondere ein Common- Rail-Einspritzsystem, mit einem elektromagnetisch betätigbaren Saugventil (1) nach einem der vorhergehenden Ansprüche, umfassend ein Gehäuseteil (8) mit einer Aufnahmebohrung (20), in welcher die Ventilplatte (6) eingesetzt und in Richtung eines Absatzes (21) axial vorgespannt ist, wobei die axiale Vorspannkraft über die Ventilschraube (7) bewirkt wird, die in die Aufnahmebohrung (20) eingeschraubt ist. 9. High-pressure pump for a fuel injection system, in particular a common rail injection system, with an electromagnetically actuated suction valve (1) according to one of the preceding claims, comprising a housing part (8) having a receiving bore (20), in which the valve plate (6) used and axially biased towards a shoulder (21), the axial biasing force being effected via the valve screw (7) threaded into the locating bore (20).
10. Verfahren zur Verbindung eines elektromagnetisch betätigbaren Saugventils (1) nach einem der Ansprüche 1 bis 8 mit einem Gehäuseteil (8) einer Hochdruckpumpe, bei dem die Ventilplatte (6) mit vormontiertem Ventilstößel (4) in eine Aufnahmebohrung (20) des Gehäuseteils (8) eingesetzt und mittels Einschrauben der Ventilschraube (7) in die Aufnahmebohrung (20) in Richtung eines Absatzes (21) des 10. A method for connecting an electromagnetically actuated suction valve (1) according to one of claims 1 to 8 with a housing part (8) of a high-pressure pump, wherein the valve plate (6) with preassembled valve stem (4) in a receiving bore (20) of the housing part ( 8) and by screwing the valve screw (7) into the receiving bore (20) in the direction of a shoulder (21) of the
Gehäuseteils (8) axial vorgespannt wird, anschließend die Distanzhülse (12) und/oder der Anker (3) in die Axialbohrung (9) der Ventilschraube (7) eingesetzt wird bzw. werden und erst nach abgeschlossenem Setzvorgang der Polkern (13) kraft, form- und/oder stoffschlüssig mit der Ventilschraube (7) verbunden wird. Housing part (8) is axially biased, then the spacer sleeve (12) and / or the armature (3) in the axial bore (9) of the valve screw (7) is inserted and only after completion of setting process of the pole core (13) force, positively and / or cohesively with the valve screw (7) is connected.
11. Verfahren nach Anspruch 10, 11. The method according to claim 10,
dadurch gekennzeichnet, dass eine Verbindung des Polkerns (13) mit der Ventilschraube (7) mittels einer Schraub- oder Pressverbindung bewirkt wird, wobei vorzugsweise über die jeweilige Einschraub- bzw. Einpresstiefe der Gesamthub des Ankers (3) eingestellt wird. characterized in that a connection of the pole core (13) with the valve screw (7) is effected by means of a screw or press connection, wherein preferably via the respective screwing or Einpresstiefe the total stroke of the armature (3) is adjusted.
12. Verfahren nach Anspruch 10 oder 11, 12. The method according to claim 10 or 11,
dadurch gekennzeichnet, dass eine Verbindung des Polkerns (13) mit der Ventilschraube (7) mittels einer Klebe- oder Schweißverbindung bewirkt wird. characterized in that a connection of the pole core (13) with the valve screw (7) is effected by means of an adhesive or welded connection.
EP15767534.9A 2014-10-21 2015-09-25 Suction valve that can be actuated electromagnetically, high-pressure pump having such a suction valve, and method for connecting such a suction valve to a housing part of a high-pressure pump Withdrawn EP3209878A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014221357.6A DE102014221357A1 (en) 2014-10-21 2014-10-21 Electromagnetically operated suction valve, high-pressure pump with such a suction valve and method for connecting such a suction valve with a housing part of a high-pressure pump
PCT/EP2015/072105 WO2016062497A1 (en) 2014-10-21 2015-09-25 Suction valve that can be actuated electromagnetically, high-pressure pump having such a suction valve, and method for connecting such a suction valve to a housing part of a high-pressure pump

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EP3209878A1 true EP3209878A1 (en) 2017-08-30

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EP15767534.9A Withdrawn EP3209878A1 (en) 2014-10-21 2015-09-25 Suction valve that can be actuated electromagnetically, high-pressure pump having such a suction valve, and method for connecting such a suction valve to a housing part of a high-pressure pump

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EP (1) EP3209878A1 (en)
DE (1) DE102014221357A1 (en)
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JP7035651B2 (en) * 2018-03-13 2022-03-15 株式会社デンソー Magnetic device
CN108798962B (en) * 2018-05-07 2020-08-11 江阴林格科技有限公司 Preparation process of fuel metering valve

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US4385614A (en) * 1979-04-06 1983-05-31 Robert Bosch Gmbh Fuel injection pump for internal combustion engines
JPS61142978U (en) * 1985-02-27 1986-09-03
DE10249161B3 (en) * 2002-10-22 2004-01-29 Robert Bosch Gmbh Device for setting an armature stroke of a solenoid valve
DE102009003208A1 (en) * 2009-05-19 2010-11-25 Robert Bosch Gmbh Method for adjusting the valve lift
DE102012224439A1 (en) 2012-12-27 2014-07-03 Robert Bosch Gmbh High pressure pump for common rail fuel injection system, has low-pressure connection module including annular portion formed with radial or sloping bore for connection of hydraulic annular space with low-pressure port

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