EP3384149A1 - Injecteur de carburant muni d'une soupape de commande - Google Patents

Injecteur de carburant muni d'une soupape de commande

Info

Publication number
EP3384149A1
EP3384149A1 EP16788726.4A EP16788726A EP3384149A1 EP 3384149 A1 EP3384149 A1 EP 3384149A1 EP 16788726 A EP16788726 A EP 16788726A EP 3384149 A1 EP3384149 A1 EP 3384149A1
Authority
EP
European Patent Office
Prior art keywords
armature
valve
fuel
crown ring
magnet assembly
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.)
Granted
Application number
EP16788726.4A
Other languages
German (de)
English (en)
Other versions
EP3384149B1 (fr
Inventor
Lars Olems
Dominik WURST
Helmut Clauss
Oezguer Tuerker
Christian Faltin
Michael WALDENMAIER
Thomas Nierychlo
Fabian FISCHER
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 EP3384149A1 publication Critical patent/EP3384149A1/fr
Application granted granted Critical
Publication of EP3384149B1 publication Critical patent/EP3384149B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F02M61/161—Means for adjusting injection-valve lift
    • 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
    • F02M63/0073—Pressure balanced 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F02M2200/9069—Non-magnetic 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies

Definitions

  • the invention relates to a fuel injector for injecting fuel into the fuel injector with control valve
  • Control valve has.
  • Fuel injectors with control valves are widely known from the prior art, for example from the published patent application DE 196 50 865 A1.
  • the known fuel injector for injecting fuel into the combustion chamber of an internal combustion engine comprises a control valve and an injection valve member.
  • the injection valve member defines a control chamber and is longitudinally movably guided in the fuel injector.
  • the injection valve member opens and blocks by its movement at least one injection opening in the combustion chamber.
  • the control valve controls the pressure in the control room and includes a
  • Magnet assembly an armature, a valve piece and a valve seat formed on the valve piece.
  • An armature plate arranged on the armature can be actuated by the magnet assembly.
  • the armature cooperates at least indirectly with the valve seat to relieve the control chamber.
  • the known Kraftstoffstoffinjektor has a comparatively complex Ankerhubeingnagna.
  • the anchor stroke is the way between
  • Closing body This leads to a series production during the assembly of the fuel injector to tolerance-related high variations of the armature stroke. On the other hand, it comes during operation due to
  • the fuel injector comprises a control valve and an injection valve member.
  • the injection valve member defines a control chamber and is longitudinally movable in the fuel! guided by a projector.
  • the injection valve member opens and blocks by its movement at least one injection opening in the combustion chamber.
  • the control valve controls the pressure in the control room.
  • the control valve comprises a magnet assembly, an armature, a valve piece and an on the
  • Valve piece formed valve seat The armature comprises an armature plate, wherein the armature plate can be controlled by the magnet assembly.
  • the armature cooperates at least indirectly with the valve seat to relieve the control chamber.
  • a crown ring is between the valve piece and the
  • the crown ring thus defines, optionally together with others
  • a cylindrical lateral surface is formed on the valve piece.
  • the crown ring is positioned coaxially with the valve seat on this lateral surface. Due to the coaxiality of the crown ring is optimally aligned to the valve piece and the valve seat, accordingly, the power flow is very homogeneous, so there is no tilting or
  • a cylindrical guide surface is formed on the crown ring.
  • the anchor is longitudinally movable in this
  • the crown ring has a further function: it aligns the armature radially or positions it coaxially with the valve seat.
  • the closing function of the control valve and its life are optimized; there are no malfunctions or inconsistencies of the control valve.
  • An oblique position of the anchor usually means increased wear of the
  • a Ankerhubeinstellhunt is clamped between the crown ring and the valve piece.
  • the Ankerhubeinstellhunt is easier to manufacture than the crown ring. Therefore, the Ankerhubeinstellhunt can also be made easier with different disc thicknesses, which then depending on the tolerance chain of the components involved for setting the
  • the crown ring can therefore be built specifically.
  • the crown ring can therefore be built specifically.
  • the Ankerhubeinstellin is clamped between the crown ring and the magnet assembly.
  • the crown ring surrounds the anchor outside.
  • the crown ring encompasses the anchor virtually.
  • the anchor can thus remain geometrically unchanged; the electromagnetic force acting on the armature or armature plate is thus not influenced by the crown ring.
  • a first embodiment is in the anchor plate a
  • the crown ring has a crown with the crown protruding through the plate groove.
  • the crown ring also fulfills the
  • a bearing recess is formed in the crown.
  • a rolling element is mounted, wherein the
  • Rolling element cooperates with the plate groove.
  • the rolling element is designed spherical.
  • the armature plate or the armature thus rolls off during the opening and closing of the control valve on the rolling elements. The occurring friction is minimal due to the theoretical point support and constant over the service life. The anti-rotation is thus very low friction and energy-saving.
  • the rolling element is made of an amagnetic material, preferably a ceramic.
  • the rolling element is not subject to the magnetic assembly caused by the electromagnetic
  • a residual air gap disk is arranged between the magnet assembly and the anchor plate.
  • the residual air gap disc is not magnetic.
  • the material of the crown ring has a greater coefficient of thermal expansion than the material of the anchor.
  • the crown ring is arranged at least partially surrounding the armature radially.
  • the armature is consequently subject to a greater temperature load during operation due to the rapidly flowing and high pressure fuel.
  • the material of the crown ring is non-magnetic.
  • the crown ring is made of an austenitic sintered steel or a ceramic. As a result, the crown ring influences the magnetic field of the
  • Magnetic assembly not negative.
  • the magnetic force on the anchor plate is thus not distorted.
  • the magnet assembly is clamped by means of a tension spring with the crown ring. This is a very simple and efficient bracing. On additional elaborate screw in the interior of the fuel injector can be dispensed with.
  • the magnet assembly of at least one contact pin is electrically contacted. Furthermore, the at least one
  • the magnet assembly can be axially variably positioned in the assembly, without the electrical
  • the armature is acted upon by a spring in the direction of the valve seat.
  • a spring in the direction of the valve seat.
  • an anchor bolt protrudes through the anchor.
  • the hydraulically resulting force can be reduced to the armature in the axial direction or even set to zero.
  • the magnetic assembly and the spring can be made smaller, since only smaller forces are required to move the armature.
  • the anchor bolt and the valve seat have almost the same diameter.
  • a pressure or force balanced control valve is realized.
  • FIG. 2 shows a longitudinal section of a control valve according to the invention, only the essential areas being shown,
  • FIG. 3 shows the section A-A of Figure 2 by the control valve of
  • FIG. 4 shows a control valve according to the invention in longitudinal section in a further embodiment, wherein only the essential areas are shown,
  • FIG. 5 shows a control valve according to the invention in a longitudinal section in yet another embodiment, wherein only the essential areas are shown,
  • FIG. 6 shows a control valve according to the invention in a longitudinal section in yet another embodiment, wherein only the essential areas are shown,
  • FIG. 7a shows a control valve according to the invention in a perspective view with a cut anchor in yet another embodiment, wherein only the essential areas are shown, FIG.
  • Figure 7b is the plan view of the embodiment of Figure 7a, wherein only the essential areas are shown.
  • 8a shows a control valve according to the invention in section in yet another embodiment, wherein only the essential areas are shown,
  • FIG 8b shows the plan view of the embodiment of Figure 8a, wherein only the essential areas are shown.
  • FIG. 1 is a schematic view of a fuel injector 100, as known from the prior art. With the fuel! Injector 100, fuel is injected into the combustion chamber of an internal combustion engine. Of the
  • the injector 100 comprises a holding body 10 and a control valve 1 with a magnet assembly 2 and a magnetic core 3 arranged therein.
  • the control valve 1 accommodates a movably received in the holding body 10
  • Injection valve member 1 1 operable.
  • Nozzle body 12 formed injection openings 13 in the combustion chamber of the internal combustion engine free or closes them, so that fuel can be injected if necessary into the combustion chamber.
  • the nozzle body 12 is screwed by a clamping nut 14 with the holding body 10 media-tight.
  • the control valve 1 comprises a valve piece 4, which is installed in the holding body 10 and has a control chamber 15 for actuating the injection valve member 1 1, whose opening or closing is controlled by the control valve 1.
  • the operation of the fuel injector 100 is such that at a pressure reduction in the control chamber 15, the injection valve member 1 1 in the
  • Control chamber 15 pushes and thus the injection ports 13 is free and that at a pressure increase in the control chamber 15 of this hydraulic pressure the
  • Injection valve member 1 1 presses in the direction of the combustion chamber and thereby the injection openings 13 are closed.
  • the injection valve member 1 1 can also be designed in several parts.
  • 2 shows a control valve 1 according to the invention in longitudinal section, wherein only the essential areas are shown. At the bottom of Figure 2 is still guided in the valve member 4 injection valve member 1 1 can be seen, which is moved by the pressure change in the control chamber 15 in the axial direction of the fuel injector 100.
  • the valve piece 4 is clamped in the holding body 10.
  • the control chamber 15 is connected by a formed in the valve piece 4 outlet throttle 16 with a valve chamber 17.
  • the valve chamber 17 is connected by the control valve 1 with a low-pressure chamber 18, wherein the low-pressure chamber 18 opens into an unillustrated return system of the fuel injector 100.
  • valve chamber 17 is bounded by the valve piece 4, an at least partially tubular anchor 5 and an anchor bolt 6.
  • Low-pressure space 18 is bounded by the valve piece 4 and the armature 5.
  • the armature 5 cooperates with a valve seat 4 formed on the valve seat 7. If the armature 5 abuts on the valve seat 7, then a hydraulic connection is separated from the valve chamber 17 to the low-pressure chamber 18; if the armature 5 is lifted off the valve seat 7, then the hydraulic connection from the valve chamber 17 to the low-pressure chamber 18 is opened.
  • the anchor bolt 6 is at least partially disposed in a bore of the armature 5 and thus guides the armature 5 longitudinally movable.
  • the anchor bolt 6 further limits the valve space 17 and thus serves to equalize the pressure of the armature 5. Consequently, the armature 5 is sleeve-shaped at least in its region adjacent to the valve space 17 and can thus be pressure- or
  • valve seat 7 has almost the same diameter as the anchor bolt 6. Strictly speaking, the bore of the armature 5, through which the anchor bolt 6 projects, the same
  • Control valve 1 is then referred to as force-balanced or pressure-balanced.
  • the longitudinal movement of the armature 5 may alternatively also by a
  • Ventil nowadayshals 41 of the valve member 4 are guided.
  • the armature 5 is acted upon by a spring 8 and is pressed by this against the valve seat 7.
  • a bearing ring 81 is arranged between the armature 5 and the spring 8, wherein the bearing ring 81 preferably serves to adjust the force of the spring 8.
  • the magnet assembly 2 with the magnetic core 3 disposed therein is at the valve space 17
  • the magnet assembly 2 is supported by a crown ring 20 and a
  • Ankerhubeinstellin 21 directly on the valve piece 4 from.
  • an end face 40 is formed on the valve piece 4, which cooperates with the Ankerhubeinstellin 21.
  • the crown ring 20 is subsequently connected to the
  • Magnet assembly 2 braced, with at least one crown 29 on the
  • Crown ring 20 is formed or arranged.
  • the anchor plate 50 has at least one plate groove 54, through which the crown 29 is guided in the axial direction.
  • the crown 29 cooperates with the magnet assembly 2 or is clamped with this.
  • the magnet assembly 2 in turn is pressed by a tension spring 22 against the crown 29.
  • the tension spring 22 may, as shown in Figure 2, be designed as a plate spring, alternatively with opposite curvature. However, the tension spring 22 may also be designed as any spring, for example as a wave spring.
  • a locking ring 24 serves as an assembly aid, so that the magnet assembly 2 does not fall out of the fuel injector 100 during assembly.
  • Restluftspaltissue 23 is disposed externally between the magnet assembly 2 and the armature 5 and prevents adhesion of the armature 5 at the
  • the residual air gap disc 23 may also be designed on the inside; then it would be located between the inner pole of the magnet assembly 2 and the anchor plate 50. To adjust the armature stroke, so the way the armature 5 in its opening and closing movements between the valve seat 7 and the
  • Restluftspaltissue 23 can perform, the relevant dimensions of the control valve 1 adapted a corresponding Ankerhubeinstellin 21 is used.
  • the crown ring 20 and the Ankerhubeinstellin 21 may also be made in one piece; Accordingly, the armature stroke would then be adjusted over the axial length of the crown ring 20.
  • the crown ring 20 can advantageously be designed as an austenitic sintered part so as not to impair the magnetic flux of the magnetic assembly 2.
  • a ceramic sintered part can be used.
  • the armature 5 is longitudinally movable on the anchor bolt 6, that is perpendicular to the cutting plane, out.
  • the armature plate 50 of the armature 5 has three armature wings 51, 52, 53, each having a circular segment shape. Between each two armature blades, a respective plate groove 54, 55, 56 of the anchor plate 50 is formed.
  • a crown 29 of the crown ring 20 is arranged in each case a plate groove 54, 55, 56, so that the three crowns 29 protrude through the anchor plate 50 and contact the magnet assembly 2 in the mounted state.
  • the crown ring 20 may have any number of crowns 29.
  • the crowns 29 are used in an advantageous development not only the
  • Control valve 1 in longitudinal section, which will be discussed below only the essential differences from the embodiment of Figure 2.
  • the armature 5 is guided by the anchor bolt 6, or alternatively by the valve neck 41, longitudinally movable.
  • the leadership of the armature 5 is carried out in the embodiment of Figure 4 by the crown ring 20.
  • a collar 42 is disposed on the valve member 4, which inside the Valve space 17 limited.
  • the crown ring 20 is fixed at least radially by means of an inner positioning surface 27 formed on it, so that it is preferably arranged concentrically to the valve seat 7.
  • the positioning surface 27 can also be located on the outside and thus the lateral surface 43 on the inside.
  • the collar 42 is made shorter in comparison to the valve neck neck 41 of Figure 2, since it no longer has a guide function for the armature 5.
  • the crown ring 20 is arranged at least partially surrounding the armature 5 radially.
  • the crown ring 20 further has an inner guide surface 28, with which the armature 5 is longitudinally movably guided.
  • the positioning surface 27 and the guide surface 28 are the same inner
  • Guide surface 28 viewed in the axial direction are arranged one above the other.
  • the contact pins 31 in the embodiment of Figure 4 have a slide seat 31 a, through which the axial length of the contact pin 31 is made variable, so that the magnet assembly 2 during the
  • Mounting process can be positioned axially correctly without the electrical contact of the magnetic core 3 is interrupted.
  • the crown ring 20 and the Ankerhubeinstellin 21 can be made in one piece.
  • FIG. 5 shows yet a further embodiment of the control valve 1 according to the invention in longitudinal section, wherein only the essential differences from the exemplary embodiments of FIGS. 2 and 4 will be discussed below.
  • the guide of the armature 5 takes place through the crown ring 20 and through the guide surface 28 of the crown ring 20.
  • the positioning surface 27 of the crown ring 20th fixed at least radially on the collar 42 of the valve member 4 or arranged with very little clearance.
  • the crown 29 is not passed through a plate groove of the anchor plate 50, but surrounds or embraces the
  • Anchor plate 50 outside.
  • the anchor plate 50 can be made without grooves as a complete circular ring.
  • the radial extent of the crown 29 is optionally increased.
  • Abströmlöcher 25 are formed, which are part of the low-pressure chamber 18.
  • the outflow holes 25 can also be dispensed with if the flow gaps on the outside of the crown ring 20 or the crown 29 have a sufficient flow cross section.
  • the Ankerhubeinstellin 21 is between the crown 29 and the
  • Magnet assembly 2 braced. In all embodiments, the
  • ankerhubeinstellin 21 either be clamped between the crown 29 and the magnet assembly 2, or between the crown ring 20 and the valve member 4, or be made integral with the valve member 4.
  • the residual air gap disc 23 is further arranged at the inner pole of the magnet assembly 2 between this and the armature plate 50, wherein the radial positioning of the residual air gap disc 23 for all
  • Embodiments are freely selectable.
  • the fuel injector 100 of the embodiment of Figure 5 further comprises a spring adjusting disc 80, which serves to adjust the tension spring 22.
  • the holding body 10 is screwed with the interposition of the spring adjusting disc 80 by a union nut 9a with a holding body head 9.
  • a stop surface 9b is formed, at which
  • valve member 4 is fixed to the holding body 10 is about valve piece 4, holding body 10, spring adjusting disk 80 and 9 holding body head the
  • Stop surface 9b positioned.
  • the crown ring 20 and the Ankerhubeinstellin 21 a lower stop for the
  • Federeinstellin 80 set so that thereby also the force of
  • Tension spring 80 is adjusted. Furthermore, the force of the spring 8 is adjusted by means of the support ring 81.
  • the support ring 81 When energized magnetic core 3, so when planting the armature 5 to the valve seat 7, between the armature 5 - or the support ring 81 - and the stop surface 9b strained spring 8 in terms of their spring force and their travel very well by the height of Auflagerings 81 are set.
  • FIG. 6 shows a section of a further embodiment of the control valve 1 according to the invention in longitudinal section.
  • the embodiment of FIG. 6 has a spherical closing body 60 which is positioned in a receiving piece 61.
  • the receiving piece 61 is arranged between the armature 5 and the closing body 60 and is acted upon by the armature 5, wherein the
  • control valve 1 Due to the spherical closing body 60, the control valve 1 is no longer force-balanced in this embodiment.
  • the components anchor 5, receiving piece 61 and closing body 60 can be carried out in one or two parts in alternative embodiments.
  • the crown ring 20 is clamped between a formed on the valve piece 4 paragraph 49 and the magnet assembly 2, optionally with the interposition of Ankerhubeinstellin 21.
  • the lateral surface 43 of the valve member 4 is located inside and the positioning 27 of the crown ring 20 outboard.
  • the crown ring 20 is thus positioned coaxially with the valve piece 4 and consequently coaxially with the valve seat 7.
  • Crown ring 20 can be done.
  • the crown ring 20 has in this embodiment, two crowns 29, which protrude through two plate grooves 54, 55 of the anchor plate 5.
  • any number of crowns 29 and plate grooves 54, 55, 56 may be used.
  • crown ring 20 can also be designed to surround the armature 5 on the outside, as shown in FIG.
  • FIG. 7 shows a further embodiment of the control valve 1, wherein only the essential areas are shown.
  • FIG. 7 a shows the control valve 1 in a perspective view with a cut anchor 5 and
  • FIG. 7 b shows the control valve 1 in plan view of the anchor plate 50.
  • the crown ring 20 of the embodiment of FIG. 7a / FIG. 7b advantageously has three crowns 29, it being possible in principle for any number of crowns 29 to be used.
  • the anchor plate 50 has a corresponding number of plate grooves 54, 55, 56, through which the crowns 29 are passed in the axial direction.
  • the crowns 29 cooperate with the front side of the magnetic assembly 2, not shown, or are clamped with this.
  • Bearing recess 59 is formed.
  • the bearing recesses 59 are
  • Bearing recesses 59 serve to receive rolling elements 58, which are preferably spherical in shape; thereby fulfill the
  • Bearing recesses 59 the function of bearing cages.
  • the rolling elements 58 are dimensioned and positioned in the bearing recesses 59, that they cooperate with the plate grooves 54, 55, 56 of the anchor plate 50, in both circumferential directions, ie tangentially, so that each rolling element 58th
  • the rotation of the armature plate 50 and the armature 5 is thus very low friction and low-wear, because the armature 5 rolls almost over its plate grooves 54, 55, 56 on the rolling elements 58.
  • the rolling elements 58 are made of a non-magnetic material, such as a ceramic, so that they are not affected by the
  • FIG. 8 shows an anti-rotation lock of the anchor plate 50 that is alternative to FIG.
  • FIG. 8a shows the control valve 1 in a longitudinal section in the region of a roller body 58 and FIG. 8b shows the control valve 1 in plan view of the anchor plate 50.
  • the bearing recesses 59 are cup-shaped in the embodiment of FIG. 8, with one in each case Circumferential direction of the armature 5 open end.
  • a rolling element 58 is positioned in each case in a bearing recess 59 so that it at the open end of the bearing recess 59 with a flank of the
  • Anchor plate 50 mounted on a plate groove 54, 55, 56 in a circumferential direction, but not in the opposite direction oriented circumferential direction. Therefore, at least one further rolling element 58 is required, which also supports the armature plate 50 in the oppositely oriented circumferential direction.
  • the crown ring preferably has an even number of crowns 29, so that the rolling elements 58 arranged in the associated bearing recesses 59 guide the anchor plate 50 in pairs in both
  • the rolling elements 58 are mounted in the radial direction of the crowns 29.
  • the radial direction to the outside can also be supported by a further component, for example by the residual air gap disk 23, if this is arranged as in the exemplary embodiment of FIG.
  • the operation of the fuel injector 100 according to the invention is as follows: The injections via the injection openings 13 into the combustion chamber of
  • the injection valve member 1 1 is longitudinally movably guided in the valve piece 4 at its end opposite the injection openings 13 and defines the control space 15 there.
  • Low-pressure chamber 18 is thereby closed and the control chamber 15 is filled with fuel under high pressure via an inlet throttle, not shown.
  • the hydraulically closing force in the control chamber 15 increases on the injection valve member 1 1 in the direction of the injection openings 13 again and the injection valve member 1 1 closes the injection openings 13th
  • the components of the control valve 1 which have an influence on the stroke of the armature 5 are reduced: the axial distance between the valve seat 7 and the magnet assembly 2 is defined by valve piece 4, crown ring 20 and, if appropriate, armature stroke adjusting disk 21. Subtracting from the effective length of the armature 5 and possibly the height of the
  • Crown ring 20 chosen so that there is a larger
  • the material of the crown ring 20 is further selected so that it does not affect the magnetic flux of the magnet assembly 2, for example austenitic steel or a ceramic.
  • the protruding through the anchor plate 50 through crowns 29 of the crown ring 20 also have a function for

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

Abstract

L'invention concerne un injecteur de carburant (100) servant à injecter du carburant dans la chambre de combustion d'un moteur à combustion interne. L'injecteur de carburant (100) comprend une soupape de commande (1) et un élément de soupape d'injection (11). L'élément de soupape d'injection (11) délimite une chambre de commande (15) et est guidé longitudinalement dans l'injecteur de carburant (11). L'élément de soupape d'injection (11), à la suite de son mouvement, ouvre et ferme au moins une ouverture d'injection (13) dans la chambre de combustion. La soupape de commande (1) commande la pression dans la chambre de commande (15). La soupape de commande (1) comprend un ensemble magnétique(2), un induit (5), un obturateur (4) et un siège de soupape (7) formé sur l'obturateur (4). L'induit (5) comprend une plaque (50), laquelle peut être commandée par l'ensemble magnétique (2). L'induit (5) coopère au moins indirectement avec le siège de soupape (7) afin de décharger la chambre de commande (15). Une bague formant couronne (20) est serrée entre l'obturateur (4) et l'ensemble magnétique (2).
EP16788726.4A 2015-12-03 2016-11-02 Injecteur de carburant muni d'une soupape de commande Active EP3384149B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015224177.7A DE102015224177A1 (de) 2015-12-03 2015-12-03 Kraftstoffinjektor mit Steuerventil
PCT/EP2016/076439 WO2017092955A1 (fr) 2015-12-03 2016-11-02 Injecteur de carburant muni d'une soupape de commande

Publications (2)

Publication Number Publication Date
EP3384149A1 true EP3384149A1 (fr) 2018-10-10
EP3384149B1 EP3384149B1 (fr) 2020-05-06

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EP16788726.4A Active EP3384149B1 (fr) 2015-12-03 2016-11-02 Injecteur de carburant muni d'une soupape de commande

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EP (1) EP3384149B1 (fr)
KR (1) KR102623972B1 (fr)
CN (1) CN108291509B (fr)
DE (1) DE102015224177A1 (fr)
WO (1) WO2017092955A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016225948A1 (de) 2016-12-22 2018-06-28 Robert Bosch Gmbh Kraftstoffinjektor
CN111894776B (zh) * 2020-07-06 2021-09-17 一汽解放汽车有限公司 一种燃料喷射器

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013832A1 (de) * 1990-04-30 1991-10-31 Bosch Gmbh Robert Elektromagnetisch betaetigbares brennstoffeinspritzventil
DE19650865A1 (de) 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
DE10131201A1 (de) * 2001-06-28 2003-01-16 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
DE10240880B4 (de) * 2002-09-04 2016-12-01 Robert Bosch Gmbh Aktorverbindung an Kraftstoffinjektoren von Verbrennungskraftmaschinen
US20060138374A1 (en) * 2004-04-14 2006-06-29 Lucas Michael A Solenoid actuated flow control valve including adjustable spacer
JP2006257874A (ja) * 2004-04-30 2006-09-28 Denso Corp インジェクタ
ATE352714T1 (de) * 2005-06-17 2007-02-15 Magneti Marelli Powertrain Spa Brennstoffeinspritzventil
DE102007025614A1 (de) * 2007-06-01 2008-12-04 Robert Bosch Gmbh Ankerhubeinstellung für Magnetventil
DE102007025961A1 (de) * 2007-06-04 2008-12-11 Robert Bosch Gmbh Injektor
DE102008005532A1 (de) * 2008-01-22 2009-07-23 Robert Bosch Gmbh Kraftstoffinjektor, dessen Steuerventilelement einen Stützbereich aufweist
US8689772B2 (en) * 2011-05-19 2014-04-08 Caterpillar Inc. Fuel injector with telescoping armature overtravel feature
JP5689395B2 (ja) * 2011-09-28 2015-03-25 ナブテスコ株式会社 電磁弁
EP2713040B1 (fr) * 2012-09-26 2017-06-07 Delphi International Operations Luxembourg S.à r.l. Connecteur électrique
GB201503158D0 (en) * 2015-02-25 2015-04-08 Delphi International Operations Luxembourg S.�.R.L. Control valve arrangement

Also Published As

Publication number Publication date
CN108291509A (zh) 2018-07-17
KR102623972B1 (ko) 2024-01-11
DE102015224177A1 (de) 2017-06-08
KR20180090842A (ko) 2018-08-13
CN108291509B (zh) 2020-12-04
WO2017092955A1 (fr) 2017-06-08
EP3384149B1 (fr) 2020-05-06

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