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
  • 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

• DE 196 50 865 A1 discloses a solenoid valve for controlling the fuel pressure in a control chamber of an injection valve, for example for common rail injection systems.
• the fuel pressure in the control chamber controls a stroke movement of a valve piston with which an injection opening 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 greater 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 Kopp ler is surrounded by under system pressure fuel.
• 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 the upper stroke stop contains, is joined to the shaft portion 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, to provide a guide sleeve which, on the one hand, has a support section on which the magnetic core of the solenoid valve rests, and which, on the other hand, comprises a guide section, within which an anchor plate is guided with a trained on this 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 yi, the height of the guide sleeve by y 2 .
• yi the height of the guide sleeve
• y 2 the height of the guide sleeve
• the magnet core is preferably pressed against the bearing surface by an elastically designed spring element, which may be annular, for example.
• 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 switching disc between the lower end face of the magnetic core and the upper plan side of the armature assembly represents only one possible variant.
• the armature can also fully or partially directly on the magnetic core of the solenoid valve strike and / or it may be a residual air gap on a introduced into the anchor stage or a coating of the armature or its magnetic core zu josder end face or the magnetic core end face, which assigns the anchor plate, are represented.
• 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 dome-shaped elevation is provided 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 joined 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 the example shown here with 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 end face 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 shows a solenoid valve according to the prior art with an armature stroke stop close to the seat and an anchor constructed in two parts,
• FIG. 2 shows a first embodiment of the solenoid valve with guide sleeve proposed according to the invention
• Figure 3 shows a further embodiment of the embodiment shown in Figure 2 of the present invention proposed solenoid valve with guide sleeve, which is shrunk onto a Morse taper on the valve piece, and
• Figure 4 shows a further embodiment of the inventively proposed guide sleeve with fixation by means of a screw connection to a Domf ⁇ rmigen survey of the valve member in the seating area.
• FIG. 1 shows a solenoid valve according to the prior art.
• a fuel injector 10 as shown in Figure 1 comprises 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 designed symmetrically to the axis 20 as shown in FIG.
• 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, it can also be seen that the armature assembly 30 of the solenoid valve 14 as shown in FIG. 1 is a multi-part armature assembly 30, in which the armature plate 32 is displaceably mounted on the armature bolt 34.
• FIG. 1 shows that the armature plate 32 guided on the lateral surface of the armature 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 is spherical in shape in FIG.
• the ball-shaped closing element 44 closes a drainage channel in a valve piece 46, in which a control chamber is accommodated for actuating an injection needle member, not shown in FIG. 1, which is preferably needle-shaped.
• FIG. 1 also shows that the armature guide 38 is fastened in the holding body 12 of the fuel injector 10 by means of a valve clamping screw 48.
• 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 outflow bore 50, via which with open sealing seat 42 from the formed in the valve piece 46 control chamber fuel exiting in the low pressure region, i. the return 24 flows in the head region of the fuel injector 10.
• FIG. 2 shows a first embodiment of the solenoid valve proposed according to the invention.
• the illustration according to FIG. 2 shows that the fuel injector 10 is in the
• Head area comprises the solenoid valve 14, which the magnetic core 22 and in the
• Magnetic core 22 recessed magnetic coil 26 which cooperates with the armature assembly 30.
• the armature assembly 30 in turn comprises the armature plate 32, whose
• Plan page 74 of the lower end face of the magnetic core 22 faces. This one is from one
• Axis 20 symmetrically formed pressure pin 92 extends. 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.
• 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. From the illustration according to FIG. 2, it can be seen that the elevation 104 according to this embodiment has a cylindrical lateral surface on which the guide section 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. Via the outlet channel 84 with the outlet throttle 88 received therein, a control chamber formed in the valve piece 46 but not shown in FIG. 2 is pressure-relieved. From Figure 2 it is apparent that the sleeve-shaped projection of the armature 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 end face designated by reference numeral 94 on the underside of the sleeve-shaped projection of the anchor plate 32 rests on a seat surface 90 on the upper side of the elevation 104 of the valve piece 46 and closes the seat 42, 86.
• a residual air gap disk 76 is applied on the flat side 74 of the armature plate 32, which is opposite the lower end side of the magnet 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 yi.
• 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 urged by the elastic spring member 70 against the end face, i. pressed 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 a magnetic clamping nut, not shown in Figure 2.
• 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. This only changes the distance between the This affects slightly the biasing force with which the elastic spring element 70 holds down the magnetic core 22 of the guide sleeve 60.
• 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.
• drain gap 72 between the inside of the holding body 12 and the outer circumference of the magnetic core 22, via which the quantity diverted into the discharge space 80 can flow, for example, to the discharge nozzle 66 .
• discrete drainage channels be it a drainage channel or a plurality of drainage channels instead of the drainage channel 72, can also be formed in ring form.
• the stop of the armature 32 on the magnetic core 22 via the residual air gap disc 76 takes place.
• the armature 32 may also strike the full or partial area directly on the magnetic core 22 and / or it may be a residual air gap via a in the anchor, i. the armature plate 32 introduced stage and / or a coating of the plan side 74 of the armature plate 32 and / or the assigning this end face of the magnetic core 22 are shown.
• FIG. 3 shows a further embodiment of the valve proposed according to the invention.
• FIG. 3 shows that the armature 32, symmetrical with respect to the axis 20, has a through bore into which the pressure pin 92 shown in FIG. 2 is embedded, so that a pressure-balanced and force-balanced solenoid valve 14 is obtained.
• On the plan side 74 of the anchor plate 32 is the residual air gap disc 76 already described.
• the upper end side of the residual air gap disc 76 has the end face of the magnetic core 22 forming the armature stroke 102, as sketched in FIG. 3, opposite this end face (only indicated in FIG. 3).
• the armature 32 is enclosed by the guide sleeve 60 according to the embodiment in FIG.
• 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 acting on the guide sleeve 60 Pressing force 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 in 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 is pressed later in operation against the ring-shaped bearing surface 98 shown in Figure 3 at the upper end of the support portion 62.
• FIG. 3 further shows that the sealing seat 42, 86 is formed between the seat surface 90 of the elevation 104, which is embodied with Morse taper 118, and the end face 94 of the sleeve-shaped projection of the anchor plate 32.
• the elevation 104 has a slightly conical contour 106 on its outer circumferential surface, 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 solution proposed according to the invention for a solenoid valve.
• FIG. 4 shows that a threaded portion is attached to the outer circumference of the elevation 104 of the valve piece 46 and forms a screw 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 section 64 the sleeve-shaped projection of the anchor plate 32 is guided, is connected on the one hand via the screw connection 112 to the elevation 104 on the valve piece 46 and on the other hand is supported via a support 116 with interposition of an elastic region 114 on the plane surface 96 of the valve piece 46 from.
• the guide sleeve 60 is screwed onto the valve member 46 and secured by the screw connection 112 therewith.
• the armature stroke AH can be changed by varying the tightening torque of this screw connection 112.

Applications Claiming Priority (2)

Publications (2)

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ID=39720503

Family Applications (1)

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• 2007
  • 2007-06-01 DE DE102007025614A patent/DE102007025614A1/de not_active Withdrawn
• 2008
  • 2008-05-14 AT AT08750284T patent/ATE538302T1/de active
  • 2008-05-14 CN CN2008800184703A patent/CN101680406B/zh not_active Expired - Fee Related
  • 2008-05-14 EP EP08750284A patent/EP2156046B1/fr not_active Not-in-force
  • 2008-05-14 WO PCT/EP2008/055896 patent/WO2008145514A1/fr active Application Filing

Non-Patent Citations (1)

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