EP2156046B1 - Ajustement de trajet d'armature pour électrovanne - Google Patents

Ajustement de trajet d'armature pour électrovanne Download PDF

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Publication number
EP2156046B1
EP2156046B1 EP08750284A EP08750284A EP2156046B1 EP 2156046 B1 EP2156046 B1 EP 2156046B1 EP 08750284 A EP08750284 A EP 08750284A EP 08750284 A EP08750284 A EP 08750284A EP 2156046 B1 EP2156046 B1 EP 2156046B1
Authority
EP
European Patent Office
Prior art keywords
armature
fuel injector
guide sleeve
sealing seat
elevation
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.)
Not-in-force
Application number
EP08750284A
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German (de)
English (en)
Other versions
EP2156046A1 (fr
Inventor
Holger Rapp
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Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP2156046A1 publication Critical patent/EP2156046A1/fr
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Publication of EP2156046B1 publication Critical patent/EP2156046B1/fr
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    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • F02M63/0042—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing combined with valve seats of the lift valve type
    • 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
    • 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
    • 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
    • F02M63/0077—Valve seat details
    • 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
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F02M2200/9076—Non-ferrous metals
    • 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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0043—Two-way valves

Definitions

  • Out DE 196 50 865 A1 or EP 890 730 A2 is a solenoid valve for controlling the fuel pressure in a control chamber of an injection valve, such as for common-rail injection systems, known. About the fuel pressure in the control chamber, a stroke movement of a valve piston is controlled, with which an injection port of the injection valve is opened or closed.
  • the solenoid valve comprises an electromagnet, a movable armature and a valve which is moved with the armature and acted upon by a valve closing spring in the closing direction, which cooperates with the valve seat of the solenoid valve and thus controls the fuel drain from a control chamber.
  • the hydraulic coupler comprises a coupler sleeve with an internal bore in which the valve piston is guided.
  • the diameter of the coupler sleeve is larger than the outer diameter of the needle-shaped injection valve member.
  • the coupler sleeve rests on a nozzle body at its lower end with a sealing edge formed on its end face and encloses a coupler volume.
  • the coupler sleeve is employed in the idle state with a small, applied via a coil spring force to an end face of the nozzle needle.
  • the coupler sleeve or the coupler is surrounded by fuel under system pressure.
  • system pressure is meant the fuel pressure level generated in a fuel injection system, such as via a high pressure pump, within a high pressure reservoir body (common rail).
  • the armature stroke is the free distance that the anchor between its position in the Quiescent state, usually defined by the contact of the armature and a valve piece on the sealing seat, as well as an anchor position on an upper stroke stop is available.
  • the armature stroke is thus affected by the distance between the sealing seat formed in the valve piece and an upper stroke stop.
  • the stroke stop for the armature is carried out in many cases as close to the sealing seat, so for example below the magnetically active armature region.
  • this has the consequence that the armature must have a collar on its shaft, and consequently the magnetically active region of the armature must be carried out in a separate part, which only after the assembly of the armature guide, which in this case contains the upper stroke stop, is joined with the shank part of the anchor. Joining can be done either detachable or non-detachable.
  • the upper stroke stop is to be arranged above the anchor guide.
  • Common here are the versions of a Hubanschlages on the magnetic core, so for example directly via an inserted between the armature and core residual air gap foil or on a sleeve which is supported on a discharge pipe arranged above the core.
  • results for the distance between the sealing seat in the valve piece and the upper stroke stop a considerably longer and therefore also much tolerance-sensitive tolerance chain.
  • the position of the sealing seat in the holding body of the fuel injector may shift by a few microns under the influence of the system pressure below the sealing seat, whereas the position of the upper lifting stop relative to the holding body remains unaffected by the system pressure.
  • the present invention has for its object to make the distance between a sealing seat and a stroke stop of a solenoid valve for actuating a fuel injector unaffected by system pressure, which is applied to the fuel injector.
  • a force-balanced valve which has a one- or multi-part armature
  • a guide sleeve on the one hand has a support portion on which the magnetic core of the solenoid valve rests, and on the other hand comprises a guide portion, within which an anchor plate with a is guided on this trained sleeve-shaped approach.
  • the upper stroke stop for the armature of the inventively proposed solenoid valve, in particular arranged in this armature assembly is formed on the magnetic core and can be realized for example via a stop which is formed by an inserted between the armature plate and magnetic core residual air gap disc.
  • the guide sleeve lies with its lower end face on the valve piece, on which the sealing seat is formed, while the magnetic core is supported on an upper, for example, annular support surface by the guide sleeve.
  • the axial distance between the sealing seat in the valve piece and the bearing surface of the guide sleeve on the valve piece can be denoted by y 1 , the height of the guide sleeve with y 2 .
  • y 1 the height of the guide sleeve with y 2 .
  • the magnet core in the assembled state of the fuel injector, is pressed by an elastically designed spring element against the support surface, which may be designed to be annular, for example, the guide sleeve.
  • the spring element is supported for example on the inside of a lid, with which the solenoid valve is closed in the head region of the fuel injector.
  • the discharge nozzle, which limits the cavity in which the elastic spring element is received, is fixed, for example by means of a magnetic clamping nut on the holding body of the fuel injector.
  • the guide sleeve can be made of a non-magnetic material, wherein for adjusting the armature stroke (AH) between the guide sleeve and the magnetic core or between the guide sleeve and the magnet piece a shim can be inserted, which in turn can be made of a non-magnetic material.
  • AH armature stroke
  • the upper stroke stop of the armature of the solenoid valve on the magnetic core via the interposition of a residual air circuit between the lower end face of the magnetic core and the upper plan side of the armature assembly represents only one possible embodiment.
  • the anchor can also fully or partially strike directly on the magnetic core of the solenoid valve and / or a residual air gap can be represented via a step introduced into the armature or via a coating of the armature or of its end face assigning the magnetic core or the magnetic core end face which assigns the armature plate.
  • the armature stroke can be adjusted by the fact that the guide sleeve is guided via a non-positive, preferably slightly elastic designed connection with the valve piece.
  • a non-positive, preferably slightly elastic designed connection with the valve piece for example, offers a dome-shaped elevation within the valve piece, in the center of which runs a discharge channel through which the amount discharged from the control chamber when the sealing seat is opened emerges.
  • the lateral boundary of this dome-shaped elevation may be formed for example in the form of a Morse taper, so that the guide sleeve which receives the armature of the inventively proposed solenoid valve can be added in the form of a press fit on Morse taper with slight expansion of its lower portion.
  • the armature stroke (AH) can be adjusted very simply by providing the guide sleeve and the armature-in this example with the return pulley-the pressing force for the guide sleeve is increased until the distance between the upper end face of the support section , That is, the annular support surface for the magnetic core and one of the front side of the residual air gap disc has reached a target value.
  • This setpoint results from the desired value of the armature stroke as well as a lead which takes into account the elastic deformation of the bushing during the joining process.
  • the guide sleeve can be screwed onto the valve piece and the armature stroke can be adjusted by varying the tightening torque of this screw connection.
  • FIG. 1 The representation according to FIG. 1 a solenoid valve according to the prior art can be seen.
  • a fuel injector 10 as shown in FIG. 1 includes a holding body 12 in which a solenoid valve 14 is received.
  • the solenoid valve 14 is enclosed by a sleeve 16 which is closed by a cover 18 which can be secured to the sleeve 16 with a nut or the like.
  • the solenoid valve 14 is shown in FIG FIG. 1 executed symmetrically to the axis 20.
  • the solenoid valve 14 comprises a magnetic core 22 which receives a closing spring 28. Furthermore, a magnetic coil 26 is embedded in the magnetic core 22 of the solenoid valve 14.
  • the armature plate 32 of the armature assembly 30 is acted upon by the closing spring 28 is opposite the lower end face of the magnetic core 22 is an anchor plate 32 of an armature assembly. From the illustration according to FIG. 1 is further removed that it is in the armature assembly 30 of the solenoid valve 14 as shown in FIG FIG. 1 is a multi-part formed anchor assembly 30, wherein the anchor plate 32 is slidably mounted on the anchor bolt 34.
  • the armature plate 32 which is guided on the lateral surface of the anchor bolt 34, is pretensioned via an armature spring 36, which is supported on an armature guide 38.
  • the armature guide 38 also has an armature lifting stop 40, against which a collar extending in the circumferential direction on the armature bolt 34 abuts.
  • a closing element 44 At the bottom of the collar on the anchor bolt 34 is a receptacle for a closing element 44, which in the illustration in accordance with FIG. 1 is formed spherical.
  • the ball-shaped closure member 44 closes a drain passage in a valve piece 46, in which a control chamber for actuating a in FIG. 1 not shown, preferably needle-shaped injection valve member is received.
  • FIG. 1 The representation according to FIG. 1 can also be seen that the armature guide 38 is fixed by means of a valve clamping screw 48 in the holding body 12 of the fuel injector 10.
  • a valve clamping screw 48 In the foot of the armature guide 38, within which the anchor bolt 34 is displaceably guided, there is at least one discharge bore 50, via which with open sealing seat 42 from the formed in the valve piece 46 control chamber fuel in the low pressure region, ie the return 24 in the head region of the fuel injector 10th flows in.
  • FIG. 2 shows a first embodiment of the present invention proposed solenoid valve.
  • the fuel injector 10 in the head region comprises the solenoid valve 14, which has the magnetic core 22 and the magnetic core 26 embedded in the magnetic coil 26, which cooperates with the armature assembly 30.
  • the armature assembly 30, in turn, includes the armature plate 32, whose face side 74 faces the lower end face of the magnetic core 22. This is traversed by a passage opening which receives the closing spring 28 which extends on a pin 20 symmetrical to the pressure pin 92. Above the pressure pin 92 is a discharge nozzle 66, via which discharged amount flows into the low-pressure region of the fuel injector 10.
  • FIG. 2 can be seen that the magnetic core 22 is biased on the one hand via an elastic biasing member 70, and on the other hand rests on an annular bearing surface 98 of a guide sleeve 60.
  • the guide sleeve 60 in turn comprises in addition to a direction indicated by reference numeral 62 support portion formed in a smaller diameter guide portion 64 within which a sleeve-shaped projection of the anchor plate 32 is received.
  • the support portion 62 of the guide sleeve 60 defines an armature space 78; a lying outside the outer periphery of the guide sleeve 60 space represents a Abgresraum 80.
  • the carrier sleeve 60 is received with its guide portion 64 for the sleeve-shaped projection of the anchor plate 32 at a survey 104 of the valve member 46.
  • the survey 104 according to this embodiment has a cylindrical outer surface on which the guide portion 64 of the guide sleeve 60 is fixed, for example by forming a press or shrink fit 100.
  • the guide portion 64 of the guide sleeve 60 rests with its lower end face on a flat surface 96 of the valve piece.
  • the elevation 104 of the valve piece 46 is traversed by a flow channel 84 in which an outlet throttle 88 is received. About the drain passage 84 with the discharge throttle 88 received therein is formed in the valve piece 46, in FIG. 2 but not shown control room pressure relieved.
  • FIG. 2 shows that the sleeve-shaped projection of the anchor plate 32, which is the valve member in this embodiment of the solenoid valve 14, a sealing seat 42, 86 of the solenoid valve 14 closes.
  • the designated by reference numeral 94 on the underside of the sleeve-shaped projection of the anchor plate 32 rests on a seat 90 at the top of the elevation 104 of the valve member 46 and closes the seat 42, 86. Due to the closed seat 42, 86 exits no discarded amount the drainage channel 84 from.
  • a residual air gap disk 76 is applied to the plan side 74 of the anchor plate 32, which is opposite to the lower end face of the magnetic core 22.
  • the guide sleeve 60 rests with its lower end face on the flat surface 96 of the valve member 46
  • the magnetic core 22 rests on the annularly configured bearing surface of the guide sleeve 60.
  • the axial distance between the sealing seat 42, 86 and the bearing point of the guide sleeve 60 on the flat surface 96 of the valve member 46 is denoted by y 1 .
  • the height of the guide sleeve 60 is dimensioned with the dimension y 2 .
  • the distance between the sealing seat 42, 86 and the armature, ie the anchor plate 32 and the upper end face of resting on the flat side 74 of the anchor plate 32 residual air gap disk 76 is denoted by x. Consequently, the armature stroke AH results from the difference between the distance y and the distance x.
  • the magnetic core 22 is pressed by the elastic spring element 70 against the end face, ie the annular support surface 98 of the guide sleeve 60.
  • the elastic spring element 70 in turn is supported on the drain neck 66.
  • the drain pipe 66 is in turn fixed to the holding body 12, for example via an in FIG. 2 not shown magnetic clamping nut.
  • valve piece 46 in the holding body 12 under the influence of the system pressure by a few microns up or down, so the magnetic core 22 is necessarily displaced axially by the same amount. It only changes the distance between the top End face of the magnetic core 22 and the lower end face of the downcomer 66. This affects the biasing force slightly, with which the elastic spring member 70, the magnetic core 22 of the guide sleeve 60 holds down. The measure y and thus the armature stroke AH remain constant.
  • the guide sleeve 60 may be made of a non-magnetic material, as well as a set for adjusting the armature stroke AH between the guide sleeve 60 and the magnetic core 22 and / or between the guide sleeve 60 and the valve member 46 shim also made of a non-magnetic material can be.
  • the game between the anchor bolt 34 and the central bore of the guide sleeve 60 can be chosen relatively large, so that no further Guide the anchor bolt 34 within the guide portion 64 of the guide sleeve 60 is done.
  • FIG. 2 Furthermore, it can be seen, there is a ring-shaped drainage gap 72 between the inside of the holding body 12 and the outer periphery of the magnetic core 22, via which the discharged into the discharge chamber 80 amount, for example, the discharge nozzle 66 can flow.
  • a ring-shaped drainage gap 72 between the inside of the holding body 12 and the outer periphery of the magnetic core 22, via which the discharged into the discharge chamber 80 amount, for example, the discharge nozzle 66 can flow.
  • annular run-off gap discrete drainage channels, it may be a drainage channel, it may be formed a plurality of drainage channels instead of the drainage channel 72 in ring form.
  • FIG. 2 shows that in this embodiment, the stop of the armature 32 takes place on the magnetic core 22 via the residual air gap disk 76.
  • the armature 32 may strike the full or partial area directly on the magnetic core 22 and / or there may be a residual air gap via an introduced into the anchor, ie the anchor plate 32 stage and / or a coating of the plan side 74 of the anchor plate 32 and / or this assigning end face of the magnetic core 22 are shown.
  • connection to the return line 24 can be represented by a bore in the discharge nozzle 66, as well as the return 24 can be attached elsewhere, if this proves favorable or necessary for the particular application.
  • FIG. 3 is a further embodiment of the valve proposed by the invention can be seen.
  • FIG. 3 shows that the armature 32, symmetrically formed to the axis 20, has a through hole into which the in FIG. 2 shown pressure pin 92 is recessed, so that a pressure and force balanced solenoid valve 14 is obtained.
  • On the plan side 74 of the anchor plate 32 is the already described residual air gap disc 76.
  • the upper end face of the residual air gap disc 76 has to this opposite - in FIG. 3 only indicated - end face of the magnetic core 22 to the armature hub 102 forming distance, as in FIG. 3 outlined.
  • the armature 32 is according to the embodiment in FIG. 3 enclosed by the guide sleeve 60.
  • the guide sleeve 60 includes the support portion 62 and the guide portion 64.
  • the guide sleeve 60 is fixed with press fit or shrink fit 100 on a configured as Morse taper 118 with respect to the outer surface elevation 104 of the valve member 46.
  • the armature stroke AH can be adjusted very simply by inserting the guide sleeve 60, the armature 32 and - in the example shown here - also the residual air gap disc 76 already inserted and now the pressing force acting on the guide sleeve 60 is increased until the distance between the upper end face of the guide sleeve 60 and the residual air gap disc 76 has reached its desired value.
  • This setpoint results from the desired value of the armature stroke AH and a lead, which takes into account the elastic deformation of the guide sleeve 60 during the joining process.
  • the pressing force during the joining process must be significantly higher than the biasing force which is applied via the biasing member 70, with which the magnetic core 22 in operation later against the in FIG. 3 illustrated annular support surface 98 is pressed at the upper end of the support portion 62.
  • FIG. 3 shows further that the sealing seat 42, 86 is formed between the seat surface 90 of the Morsekegel 118 survey 104 and the end face 94 of the sleeve-shaped projection of the anchor plate 32.
  • the sealing seat 42, 86 located laterally in the wall of the guide sleeve 60 in the support portion 64 at least one discharge bore 82, via which the amount diverted when opening the sealing seat 42, 86 in the discharge chamber 80 is passed.
  • FIG. 3 shows that the elevation 104 on its outer circumferential surface has a slightly conical contour 106 which defines the Morse taper 118. Its cone angle in turn causes the radial expansion 108 of the guide portion 64 in the lower region of the guide sleeve 60th
  • FIG. 4 shows a further embodiment of the invention proposed solution for a solenoid valve.
  • FIG. 4 shows that on the outer circumference of the elevation 104 of the valve member 46, a threaded portion is mounted, which forms a threaded connection 112 with an internal thread, which is formed below the guide portion 64 of the guide sleeve 60.
  • the guide sleeve 60 in whose guide portion 64 of the sleeve-shaped projection of the anchor plate 32 is guided, on the one hand via the screw 112 connected to the survey 104 on the valve piece 46 and on the other hand is supported via a support 116 with the interposition of an elastic region 114 on the flat surface 96 of Valve piece 46 from.
  • the guide sleeve 60 When in connection with FIG. 4 shown solution, the guide sleeve 60 is screwed onto the valve member 46 and secured by the screw 112 with this.
  • the armature stroke AH can be changed by varying the tightening torque of this screw 112.

Landscapes

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

Claims (13)

  1. Injecteur de carburant (10) comprenant un corps de retenue (12), dans lequel est incorporée une électrovanne (14) actionnant un organe de soupape d'injection réalisé de préférence sous forme de pointeau, laquelle électrovanne présente un module d'armature (30) qui présente une plaque d'armature (32) et une butée de course d'armature (40), un siège d'étanchéité (42) étant ouvert ou fermé par le module d'armature (30), caractérisé en ce qu'un noyau magnétique (22) de l'électrovanne (14) est d'une part précontraint par le biais d'un élément de précontrainte élastique (70) et d'autre part est supporté sur une douille de guidage (60, 62, 64) recevant un élément en forme de douille de la plaque d'armature (32), laquelle douille de guidage est pour sa part reçue sur l'élément de soupape (46) en entourant un siège d'étanchéité (42, 86).
  2. Injecteur de carburant (10) selon la revendication 1, caractérisé en ce que la douille de guidage (60, 62, 64) est fabriquée en un matériau non magnétique, et présente une portion de support (62) ainsi qu'une portion de guidage (64).
  3. Injecteur de carburant (10) selon la revendication 2, caractérisé en ce que la portion de support (62) présente une surface d'appui (98) s'étendant sous forme annulaire, pour le noyau magnétique (22).
  4. Injecteur de carburant (10) selon la revendication 1, caractérisé en ce que la douille de guidage (60, 62, 64) est reçue par engagement par force (100, 112) au niveau d'un rehaussement (104) sur l'élément de soupape (46).
  5. Injecteur de carburant (10) selon la revendication 4, caractérisé en ce que la douille de guidage (60) est reçue au niveau du rehaussement (104) sur l'élément de soupape (46) dans un ajustement serré ou par frettage (100).
  6. Injecteur de carburant (10) selon la revendication 1, caractérisé en ce que la douille de guidage (60, 62, 64) est reçue par engagement par force au niveau d'un rehaussement (104) de l'élément de soupape (46), sur lequel rehaussement est réalisé un cône Morse (118) avec une conicité (106).
  7. Injecteur de carburant (10) selon la revendication 4, caractérisé en ce que la douille de guidage (60, 62, 64) est fixée sur le rehaussement (104) au cours d'une opération de raccord par vissage (112).
  8. Injecteur de carburant (10) selon la revendication 4, caractérisé en ce que la plaque d'armature (32) présente une surface frontale (94) qui forme le siège d'étanchéité (42, 86) dans la région du siège d'étanchéité (42, 86), avec une surface de siège (90) du rehaussement (104).
  9. Injecteur de carburant (10) selon la revendication 8, caractérisé en ce que la portion de guidage (64) de la douille de guidage (60) entoure le siège d'étanchéité (42, 86) radialement et au moins un alésage de sortie (82) est réalisé dans la paroi de la portion de support (64), hors duquel sort une quantité de coupure dans un espace de coupure (80) lorsque le siège d'étanchéité est ouvert (42, 86).
  10. Injecteur de carburant (10) selon l'une quelconque ou plusieurs des revendications précédentes, caractérisé en ce que la quantité de coupure s'écoule hors de l'espace de coupure (80) par le biais d'une fente d'écoulement (72) le long du noyau magnétique (22) jusqu'à une tubulure d'écoulement (66).
  11. Injecteur de carburant (10) selon la revendication 1, caractérisé en ce que la plaque d'armature (32) présente un alésage traversant dans lequel est reçue une goupille de pression (92).
  12. Injecteur de carburant (10) selon la revendication 11, caractérisé en ce que dans la région du côté basse pression de la goupille de pression (92) est disposé un alésage réalisé sous forme traversante, par le biais duquel une quantité de coupure est conduite depuis l'espace de coupure (80) dans la tubulure d'écoulement (66).
  13. Injecteur de carburant (10) selon la revendication 1, caractérisé en ce qu'une course d'armature (AH) de la plaque d'armature (32) est définie par une hauteur y2 de la douille de guidage (60), une distance y1 entre une surface plane (96) de l'élément de soupape (46) et la surface de siège (90) du rehaussement (104) ainsi que par la hauteur de la plaque d'armature (32) avec l'élément en forme de douille conjointement avec le disque d'entrefer résiduel (76).
EP08750284A 2007-06-01 2008-05-14 Ajustement de trajet d'armature pour électrovanne Not-in-force EP2156046B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007025614A DE102007025614A1 (de) 2007-06-01 2007-06-01 Ankerhubeinstellung für Magnetventil
PCT/EP2008/055896 WO2008145514A1 (fr) 2007-06-01 2008-05-14 Ajustement de trajet d'armature pour électrovanne

Publications (2)

Publication Number Publication Date
EP2156046A1 EP2156046A1 (fr) 2010-02-24
EP2156046B1 true EP2156046B1 (fr) 2011-12-21

Family

ID=39720503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08750284A Not-in-force EP2156046B1 (fr) 2007-06-01 2008-05-14 Ajustement de trajet d'armature pour électrovanne

Country Status (5)

Country Link
EP (1) EP2156046B1 (fr)
CN (1) CN101680406B (fr)
AT (1) ATE538302T1 (fr)
DE (1) DE102007025614A1 (fr)
WO (1) WO2008145514A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007044355A1 (de) * 2007-06-21 2008-12-24 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor sowie Kraftstoffinjektor
DE102007047152A1 (de) * 2007-10-02 2009-04-09 Robert Bosch Gmbh Injektor mit einem Ringraum getrennten Ankerraum
DE102011078564A1 (de) * 2011-07-04 2013-01-10 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor und Kraftstoffinjektor
CN104533679B (zh) * 2014-12-30 2016-09-07 南岳电控（衡阳）工业技术股份有限公司 一种喷油控制阀及使用此喷油控制阀的高压共轨燃油喷射***
DE102015224177A1 (de) * 2015-12-03 2017-06-08 Robert Bosch Gmbh Kraftstoffinjektor mit Steuerventil
DE102016206180A1 (de) * 2016-04-13 2017-10-19 Robert Bosch Gmbh Ventil, insbesondere Saugventil, in einer Hochdruckpumpe eines Kraftstoffeinspritzsystems
DE102016220912A1 (de) 2016-10-25 2018-04-26 Robert Bosch Gmbh Kraftstoffeinspritzventil
DE102016222871A1 (de) * 2016-11-21 2018-05-24 Robert Bosch Gmbh Kraftstoffinjektor
US20230003215A1 (en) * 2019-11-19 2023-01-05 Hitachi Astemo, Ltd. Electromagnetic valve mechanism and high-pressure fuel supply pump
CN114017230A (zh) * 2021-12-10 2022-02-08 北油电控燃油喷射***(天津)有限公司 一种衔铁分离式燃油车喷油器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5082180A (en) * 1988-12-28 1992-01-21 Diesel Kiki Co., Ltd. Electromagnetic valve and unit fuel injector with electromagnetic valve
DE19650865A1 (de) 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
IT1293433B1 (it) * 1997-07-11 1999-03-01 Elasis Sistema Ricerca Fiat Valvola di dosaggio registrabile per un iniettore di combustibile per motori a combustione interna, e relativo metodo di registrazione.
IT1296144B1 (it) * 1997-11-18 1999-06-09 Elasis Sistema Ricerca Fiat Valvola di dosaggio registrabile per un iniettore di combustibile per motori a combustione interna.
DE102006046898A1 (de) * 2006-10-04 2008-04-10 Robert Bosch Gmbh Drosselplatte für Magnetventil
DE102006053128A1 (de) * 2006-11-10 2008-05-15 Robert Bosch Gmbh Injektor zum Einpritzen von Kraftstoff

Also Published As

Publication number Publication date
DE102007025614A1 (de) 2008-12-04
CN101680406B (zh) 2012-08-08
EP2156046A1 (fr) 2010-02-24
WO2008145514A1 (fr) 2008-12-04
ATE538302T1 (de) 2012-01-15
CN101680406A (zh) 2010-03-24

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