Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/126—Supporting or mounting
• • 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
  • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
  • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
  • F02M63/0012—Valves
  • F02M63/0014—Valves characterised by the valve actuating means
  • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
  • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
• • 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
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
  • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
  • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
• • 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
  • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F2007/062—Details of terminals or connectors for electromagnets
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/16—Rectilinearly-movable armatures
  • H01F7/1638—Armatures not entering the winding

Definitions

• the invention relates to a magnet group for a solenoid valve, in particular for a solenoid actuator of a fuel injection valve. Specifically, the invention relates to the field of injectors for fuel injection systems of air compressing, self-igniting internal combustion engines.
• a fuel injection valve for an internal combustion engine is known.
• the known fuel injector has a solenoid actuator which controls fuel flow via an outflow throttle. This can indirectly an actuation of the
• the magnet group of the magnetic actuator is arranged in screwed-together housing parts.
• a plastic material is provided, which includes essential elements of the magnet group.
• the plastic material ensures electrical insulation with respect to the metallic housing of the fuel injection valve.
• sealing rings are arranged at different locations of the plastic material.
• Fuel injection valve having the features of claim 17 have the advantage that the production is simplified and in particular a relatively simple adaptation to different applications is possible. Specifically, an adaptation of the interface for a fuel return can be done relatively easily.
• the lid is connected to the housing part by a welded connection.
• a laser welding method is preferably used.
• the welded joint forms a tightly welded connection between the cover and the housing part.
• the weld seam can be designed to be durable and close to the outside in terms of operating forces.
• the weld can be attached either radially or axially. It is advantageous that between the second side of the coil and an inner side of the cover, a biased spring element is arranged, which acts on the coil with the bias, wherein the coil is supported on its first side to a shoulder of the housing part. As a result, the coil is held in the housing part.
• an anchor bolt connected to the armature extends at least in sections through a central opening of the coil and that a stop for the anchor bolt is provided on the spring element, which is a movement of the anchor bolt, in which the armature to the first side of the coil moves, limited.
• a stop for the anchor bolt is provided on the spring element, which is a movement of the anchor bolt, in which the armature to the first side of the coil moves, limited.
• the spring element has a central belly, which faces the central opening of the coil and that the belly of the spring element forms the stop for the anchor bolt. This allows easy adjustment of the extent of limiting the movement of the anchor bolt.
• a return bore through the lid for permitting return of fuel or the like may be made axial without affecting the return flow through the anchor bolt or the spring member.
• an anchor bolt connected to the anchor extends through a central opening of the coil and that an inner side of the cover facing the second side of the coil movement of the Anchor bolt, in which the armature moves to the first side of the coil, limited.
• a stop for the anchor bolt is given by the inside of the lid.
• the spring element is designed as a plate-shaped spring element, wherein the plate-shaped spring element has a central recess through which the anchor bolt can be passed.
• the spring element is designed as a plate-shaped spring element, wherein the plate-shaped spring element has a central recess through which the anchor bolt can be passed.
• the cover has at least one bore through which an electrical contact element is guided to the coil, and that the bore is sealed by means of a sealing ring arranged in the bore.
• a support ring may be provided, which is arranged in an advantageous manner aligned on an inner side of the lid to allow, for example, a support of the spring element in the region of the bore and to ensure a certain protection of the sealing ring.
• a nozzle arranged on an outer side of the cover wherein the cover has a return bore, which connects an inner space of the housing part in which the coil is arranged, which is closed by the cover, to a return duct of the nozzle to allow from the interior of the housing part to a tank or the like.
• the Return bore of the lid has a countersink, at which the return bore opens into the interior of the housing part. The countersink allows reliable return of the fuel via the return bore and facilitates easy manufacture of the cover.
• the nozzle is connected by a welded connection with the lid.
• the weld is preferably durable in terms of operating forces and designed to be tight to the outside, which is preferably configured by a laser welding process.
• the neck is formed integrally with the lid.
• At least one outer annular groove is provided on the neck.
• the annular groove in combination with an encapsulation prevents the penetration of water, moisture or the like to the weld.
• the annular groove can be designed, so to speak, as a waterstopper groove.
• one or more welds, in particular the weld, which connects the nozzle to the lid, can be protected against corrosion.
• the lid is designed disk-shaped. This facilitates precise mounting on the housing part. Furthermore, a defined contact of a spring element on the inside of the lid is made possible.
• the production of the magnet group can be done inexpensively, with an adaptation to different requirements is possible.
• the neck can largely arbitrarily to different interfaces for connecting a return line to a tank to be adjusted. In this case, no or at least with respect to the housing part no adjustment is required, so that the magnet group is largely unchanged, especially with respect to their built-in parts such as armature and coil, unchanged.
• FIG. 1 shows a fuel injection valve with a magnetic group in an excerpt, schematic sectional view according to a first embodiment of the invention.
• FIG. 2 shows the magnetic group shown in FIG. 1 in a sectional view along the section line labeled II according to a second embodiment of the invention
• FIG. 3 shows the magnet group shown in FIG. 2 according to a third embodiment of the invention
• Fig. 4 shows the lid shown in Fig. 1 with a spring element of a magnetic group according to a fourth embodiment of the invention
• FIG. 5 shows the detail of a magnet group in accordance with a fifth exemplary embodiment of the invention, designated V in FIG. 3.
• Fig. 1 shows a fuel injection valve 1 with a magnetic group (magnet assembly) 2 in a partial, schematic sectional view according to a first embodiment of the invention.
• Fuel injection valve 1 can serve in particular as an injector for fuel injection systems of air-compressing, self-igniting internal combustion engines.
• a preferred use of the fuel injection valve 1 is for a fuel injection system with a common rail, the diesel fuel under high pressure leads to a plurality of fuel injection valves 1.
• the magnet group 2 according to the invention is particularly suitable for such a fuel injection valve 1.
• the magnet group 2 can serve as part of a solenoid valve 3 which serves as a magnetic actuator of the fuel injection valve 1 for actuating the fuel injection valve 1.
• the fuel injection valve 1 according to the invention and the magnet group 2 according to the invention are also suitable for other applications.
• the fuel injection valve 1 has a nozzle body 4, in which a nozzle needle 5 is arranged.
• the pressure of a fuel in a fuel space 7 acts on the nozzle needle 5.
• the fuel space 7 is pressurized by a high-pressure pump, in particular by means of a common rail Fuel via a fuel channel 9 promoted.
• a fuel channel 9 promoted.
• an outlet throttle 11 provided for the control chamber 6, wherein a fuel flow through the outlet throttle 11 from the control chamber 6 via the solenoid valve 3 is controllable.
• the solenoid valve 3 is designed as a conical valve.
• a control seat 12 is released to open the outlet throttle 11, so that the pressure in the control chamber 6 drops.
• the nozzle needle 5 lifts off from a valve seat surface 13, so that the sealing seat formed between the nozzle needle 5 and the valve seat 13 is opened and fuel from the fuel chamber 7 through the open sealing seat a nozzle opening 14 is hosed.
• the magnet group 2 has a housing part 20. In the housing part 20, a lid 21 is inserted. The lid 21 is connected to the housing part 20 by a circumferential weld. The weld 22 is designed as an axial weld 22. Through the weld 22, an interior 23 of the housing part 20 is sealed. Furthermore, the magnet group 2 has a connection 24. The nozzle 24 is configured in one piece with the lid 21 in this embodiment. The nozzle 24 has a return channel 25. The inner space 23 is connected to the return passage 25 of the connecting piece 24 via return bores 26, 27 configured in the cover 21. This allows fuel from the interior 23 via the return passage 25 of the nozzle 24 to be returned to a tank or the like.
• an interface 28 is formed on the nozzle 24.
• the interface 28 can be adjusted relatively easily without others Components of the magnetic group 2 must be changed.
• a coil 30 is arranged, which is inserted into the housing part 20 and is supported in the mounted state on its first side 31 on a shoulder 32 of the housing part 20. During assembly, the coil 30 is inserted through an opening in the housing part 20, which is then closed by the lid 21.
• the magnet group 2 has a plate-shaped spring element 33, which is arranged in the interior 23 of the housing part 20.
• the spring element 33 is supported on the one hand on a second side 34 of the coil 30 and on the other hand on an inner side 35 of the lid 21.
• the spring element 33 is supported in the region of the center of the lid 21 between the
• the spring element 33 is mounted biased, wherein the bias occurs when inserting the lid 21 into the housing part 20.
• the spring element 33 acts on the coil 30 with the bias, so that the coil 30 is positioned in the housing part 20.
• the magnet group 2 also has an armature 36 which cooperates with the coil 30. Further, an anchor bolt 37 is provided, which is connected to the armature 36. The anchor bolt 37 extends through the coil 30. Further, the spring element 33 has a central recess 38. In the central recess 38, a sleeve 39 is arranged. Furthermore, the anchor bolt 37 is guided in the sleeve 39. Of the Anchor bolt 37 can move during the actuation of the solenoid valve 3, that is, when energizing the coil 30 through the recess 38 of the spring element 3 to the inside 35, during which movement the armature 36 is moved toward the coil 30.
• the movement of the anchor bolt 37 and thus also of the armature 36 is limited by abutment of the anchor bolt 37 on the inner side 35. Further, a spring 40 is provided, which is supported on the one hand on the armature 36 and on the other hand, the sleeve 39 is acted upon against the inside 35 of the lid 21.
• the coil 30 has a potting compound that protects the electrical components of the coil 30 from the provided in the interior 23 of the housing part 20 fuel or other liquids.
• an electrical contact 41 is shown with an electrical line 42, which allow energization of the coil 30 for actuating the solenoid valve 3, as is also described with reference to FIG. 2 in further detail.
• the housing part 20 is at the first side 31 of the coil
• the housing part 20 has a step 43, which allows exact positioning of the cover 21 when inserted into the housing part 20.
• the inner side 35 of the lid 21 is at a defined distance from the first side
• Fig. 2 shows the magnetic group 2 shown in Fig. 1 of the fuel injection valve 1 shown in Fig. 1 along the section line indicated by II in a partial representation according to a second embodiment of the invention.
• the lid 21 is connected to the housing part 20 by a radial weld 22.
• the nozzle 24 is designed with respect to the lid 21 as a separate part.
• the nozzle 24 is connected by means of a radial weld 22 'with the lid 21.
• the weld 22 ' is formed corresponding to the weld 22.
• the nozzle 24 is arranged on an outer side 44 of the lid 21 and connected to the outer side 44 of the lid 21 by welding with the lid 21 cohesively.
• the armature 36 connected to the anchor bolt 37, as well as the spring 40 and the sleeve 39 are not shown.
• the coil 30 has a central opening 45 through which the anchor bolt 37 extends.
• bores 46, 47 are provided, through which electrical contact elements 48, 49 extend.
• the electrical contact elements 48, 49 are in each case connected to one end of a winding of the coil 30, whereby outside of the housing part 20 contact points for contacting the coil 30 by means of the electrical line 42 and the electrical contact 41 are formed.
• sealing rings 50, 51 are arranged to seal the interior 23 from the environment.
• support rings 52, 53 are provided in the bores 46, 47, which are aligned on the inside 35 of the lid 21. As a result, a protection of the sealing rings 50, 51 is ensured.
• a contact in the area of the bores 46, 47 can be improved so that, in particular, tilting of the spring element 33 is prevented. This is particularly advantageous for a support of the anchor bolt 37 on the spring element 33. Such a case is described for example with reference to FIG. 5.
• FIG. 2 illustrates a possible connection of a valve housing part 54 of the fuel injection valve 1 to the magnet group 2.
• Fig. 3 shows the magnetic group 2 shown in Fig. 2 of a solenoid valve 3 for a fuel injection valve 1 according to a third embodiment of the invention.
• an electrical contact 41 is shown, which serves for contacting the electrical contact element 49.
• an electrical contact 41 ' is provided, which serves for contacting the electrical contact element 48.
• the line 42 can be connected to the electrical contact elements 48, 49.
• the spring element 33 is configured closed in the central region.
• the sleeve 39 is supported directly on the spring element 33.
• the middle region of the spring element 33 forms a stop for limiting the movement of the anchor bolt 37.
• the spring element 33 assumes the function of exerting a bias for positioning on the coil 30.
• the spring element 33 takes over the Function to limit the movement of the anchor bolt 37 and thus also the movement of the armature 36.
• Fig. 4 shows the lid 21 shown in Fig. 3 with a spring element 33 of a magnetic group 2 for a solenoid valve 3 of a fuel injection valve 1 in a sectional view according to a fourth embodiment of the invention.
• the spring element 33 is designed as a plate-shaped spring element 33.
• the spring element 33 has a recess 38.
• the anchor bolt 37 (FIG. 1) can be supported on the inner side 35 of the cover 21.
• the spring element 33 is slightly spaced apart from the inner side 35 of the cover 21 by the plate-shaped configuration except for a support region, so that the return bore 26 running obliquely through the cover 21 connects the interior 23 to the return channel 25 of the nozzle 24 (FIG ).
• the nozzle 24 may be welded to the lid 21 according to the second embodiment shown in FIG.
• the return bore 26 has in the region of the inner side 35 of the cover 21 a countersink 60, at which the return bore 26 opens into the interior 23 of the housing part 20 (FIG. 1).
• a countersink 60 at which the return bore 26 opens into the interior 23 of the housing part 20 (FIG. 1).
• the fuel flow into the return passage 25 of the nozzle 24 can be improved if necessary.
• an optionally required deburring process for the return bore 26 in the region of the inner side 35 of the cover 21 can be omitted since the countersink 60 makes it possible to arrange the spring element 33 flush against the inner side 35.
• the countersink 60 the removal of Bohrungsgraten, where the spring element 33rd if necessary.
• an optionally relatively close to the center of the inner side 35 remaining Bohrgratgrat otherwise possibly affect the stop for the anchor bolt 37.
• the countersink 60 allows an optimal bearing surface for the anchor bolt 37. This causes wear-causing misalignment of the anchor bolt 37 is prevented, whereby possible lateral forces are avoided on the solenoid valve 3 and thus a reliable function of the fuel injection valve 1 is ensured.
• the cover 21 can be ground after curing double plan to further improve the system.
• a countersink 61 is provided on the side facing the nozzle 24 of the lid 21.
• FIG. 5 shows the detail of a magnetic group 2 for a solenoid valve 3 of a fuel injection valve 1, designated V in FIG. 3, in accordance with a fifth exemplary embodiment of the invention.
• the spring element 33 on a central belly 62, which faces the central opening 45 of the coil 30.
• the spring element 33 in the middle, that is, on the central belly 62, designed to be closed.
• the central belly 62 thereby forms a stop for the anchor bolt 37.
• At the central belly 62 of the spring element 33 also supports the sleeve 39, which serves to guide the anchor bolt 37.
• the spring 40 is supported by means of the sleeve 39 on the central belly 62 of the spring element 33.
• a protection of the welds 22, 22 ', in particular the weld 22' for connecting the lid 21 with the nozzle 24, can be achieved by simple design measures.
• a circumferential groove 63 (FIG. 2) may be provided on the nozzle 24, which cooperates with an encapsulation to make a water stop.
• the electrical contact elements 48, 49 for the coil 30 can be guided by the simple holes in the cover 21 to the outside and sealed by means of sealing rings 50, 51.
• the bias generated by the spring element 33 which acts on the coil 30, be adjusted force monitored during assembly.
• a mechanical overstressing of the magnetic material, a bending of the pole faces or a lifting of the coil 30 of the shoulder 32 of the housing part 20 during operation due to too small or too large given by the bias holding forces can thus be avoided.
• a path-controlled preload force can also be exerted.
• the cover 21 can be joined to the housing part 20 in abutment, which can be achieved, for example, by a step 43 on the housing part 20 or a corresponding step 43 'on the cover 21. This allows for joining to fixed size.
• the bias generated by the spring element 33 then results from the nominal size and the tolerances of Individual components.
• the nozzle 24 is made as a deep-drawn part.
• the bias of a single spring element 33 can be applied, so that optionally a spring assembly can be saved from a plate spring with an associated disc.

Landscapes

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

Applications Claiming Priority (2)

Publications (2)

Family

ID=40886475

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Family Cites Families (10)

• 2008
  • 2008-05-26 DE DE102008001968A patent/DE102008001968A1/de not_active Withdrawn
• 2009
  • 2009-04-24 CN CN200980119465.6A patent/CN102047355B/zh active Active
  • 2009-04-24 RU RU2010152749/07A patent/RU2516445C2/ru active IP Right Revival
  • 2009-04-24 AT AT09753759T patent/ATE522914T1/de active
  • 2009-04-24 EP EP09753759A patent/EP2283495B1/fr active Active
  • 2009-04-24 ES ES09753759T patent/ES2368822T3/es active Active
  • 2009-04-24 WO PCT/EP2009/054985 patent/WO2009144104A1/fr active Application Filing

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events