EP1744054B1 - Arrangement actif de levée d'armature des injecteurs de carburant - Google Patents

Arrangement actif de levée d'armature des injecteurs de carburant Download PDF

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Publication number
EP1744054B1
EP1744054B1 EP06114059A EP06114059A EP1744054B1 EP 1744054 B1 EP1744054 B1 EP 1744054B1 EP 06114059 A EP06114059 A EP 06114059A EP 06114059 A EP06114059 A EP 06114059A EP 1744054 B1 EP1744054 B1 EP 1744054B1
Authority
EP
European Patent Office
Prior art keywords
armature
closing element
lift
guide body
component
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
EP06114059A
Other languages
German (de)
English (en)
Other versions
EP1744054A1 (fr
Inventor
Dieter Holz
Marcus Rinke
Alexander Giehl
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
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Publication date
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Publication of EP1744054A1 publication Critical patent/EP1744054A1/fr
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Publication of EP1744054B1 publication Critical patent/EP1744054B1/fr
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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
    • F02M47/025—Hydraulically 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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
    • F02M63/0022—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures the armature and the valve being allowed to move relatively to each other
    • 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
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
    • F02M63/022—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by acting on fuel control mechanism
    • 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
    • F02M2200/9007—Ceramic materials
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston
    • 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

  • the invention relates to a method for adjusting the armature stroke in a fuel injector of internal combustion engines such as in the documents EP 1 429 350 .
  • stroke-controlled injection systems can be used, with rapidly switching solenoid valves being used to control an injection valve of an electrically controlled fuel injection device with injection valve member.
  • the injection valve member of the fuel injection device is thereby loaded by a prevailing in a control chamber pressure in the closing direction.
  • To initiate the injection of the excited magnet of the solenoid valve leads to a pressure relief of the control chamber, whereupon the injection valve member is lifted by the voltage applied to the opposite side of the high pressure of their seat.
  • DE 196 50 865 A1 describes a solenoid valve for controlling the fuel pressure in a control chamber of an injection valve, for example, a common rail injection system.
  • 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 an injection valve member which is moved with the armature and acted upon by a valve closing spring in the closing direction and which cooperates with a valve seat of the solenoid valve and thus controls the fuel drain from the control chamber.
  • the injection valve member includes a closure member and a closure member guide body partially enclosing the closure member.
  • the movable armature is expediently designed in several parts so as to reduce the moving mass of the assembly armature injection valve member and thus the bouncing of the injection valve member at its seat and a ringing of the armature causing kinetic energy.
  • the two-piece armature includes an anchor bolt and an armature plate slidably received on the armature bolt against the force of a return spring in the closing direction of the injection valve member under the action of its inertial mass.
  • the opening stroke of the injection valve member in a fuel injector is decisive for the injected fuel quantity per unit time and is typically at values of 50 ⁇ m with a tolerance range of +/- 4 ⁇ m.
  • the opening stroke adjustment of the injection valve member takes place via shims.
  • the individual dimensions of the components to be joined together of a fuel injector which are relevant for the opening stroke, determined in a mechanical process and then selected according to the determined dimensions and tolerances from a wide range of panes, the correspondingly appropriate adjustment or spacer.
  • the magnet of the solenoid valve is clamped and loaded with a defined hold-down force F1.
  • the armature plate including the armature pin, the valve spring and a valve spring adjustment disc is pressed against the magnet and determines a measure a, which represents the distance between the lower, the injection valve member facing end face of the anchor bolt and the contact surface of the adjusting of the solenoid valve.
  • the measuring of an injector or holding body takes place in which a hold-down force F4 acts on the clamped injector body and the injection valve member is loaded with a hold-down force F5.
  • the difference measure b between the contact surface of the injection valve member with the anchor bolt and the bearing surface of the adjusting washer on the injector body is determined. This determines the thickness of the shim from the difference of the dimension a to measure b plus the set value of the opening stroke, referred to as AH soll .
  • the solenoid valve which is open at the top for a fuel return, is then screwed together with the appropriately dimensioned adjustment dial with the actual injector body. In this screwed or clamped state, the opening stroke is measured with high precision by means of laser distance measurement by means of the fuel return.
  • the injection valve In order to subsequently achieve an adjustment of the armature stroke within the narrow tolerance range, the injection valve must be completely disassembled and the choice of a shim be reset with a different dimensioning of the armature stroke. If necessary, this process is repeated several times until there is an acceptable tolerance setting of the armature stroke in the injection valve. This often iterative approach is extremely time consuming and therefore costly. In addition, the disassembly and selection of the correct shim requires a great deal of experience on the part of the staff to minimize rework. Overall, the currently practiced procedure is considered to be extremely unsatisfactory and is unsuitable for future injector generations, since they require even lower tolerance values.
  • the object of the present invention is to provide a simple method with which an armature stroke adjustment in an injection valve with a fuel return within a solenoid valve is largely independent of individual tolerances of the components and can be actively set in the screwed state of the solenoid valve with an injector body.
  • armature stroke tolerances required for future injector generations are to be made possible without high cost, i. without reducing the manufacturing tolerances of all the individual components of the injector, which would require new manufacturing processes, new equipment, more accurate measurement techniques for manufacturing tolerance monitoring.
  • the method according to the invention allows the armature stroke adjustment in the screwed state of the injection valve.
  • a direct influence is taken on a measure b, which represents the distance between an upper contact surface of an injection valve member, which comprises a closing element guide body and a closing element, and the bearing surface of the adjusting washer on the injector body.
  • a plastic deformation is preferably introduced exclusively into the closing element guide body by an applied embossing force such that the decisive for the armature stroke dimension b changes, whereby a smaller, standard armature stroke is increased to the target value of the armature lift.
  • embossing of the closing element into the closing element guide body is achieved by the applied embossing force.
  • an active setting of a desired armature stroke, associated with a narrow tolerance range, in the assembled state of the injection valve is possible, which is largely decoupled from manufacturing variations of the individual components of the injection valve.
  • the accuracy of the armature stroke adjustment is largely independent of the tolerances of the components.
  • the inventive method itself is no longer based on expensive measuring methods for testing the injection valve components, so that they can be reduced if not even eliminated.
  • the implementation of the assembly of the injection valve, i. screwing the solenoid valve and injector body no longer affects the armature stroke achieved and its tolerance values. Iterative methods for calculating the dimensioning of the shim omitted and the classification of the shim reduces in effort. The method provides a cost effective and relatively simple solution to the exact adjustment of the armature stroke.
  • the stamp used for the inventive method is designed so that it can be safely and easily introduced into the fuel return of the solenoid valve without damaging this during the stamping process.
  • the material used for the die has higher hardness and strength values than the corresponding sizes of material from which the anchor bolt is made.
  • the closing element which is preferably designed as a ball, consists in particular of passenger car injection valves made of silicon nitride, which ensures that deform during the embossing process only the closing element guide body and the valve seat of the valve piece according to the embossing.
  • the deformation of the valve seat on the valve piece can influence the flow conditions in the valve opening area.
  • the closing element guide body is modified such that the embossing force applied by the embossing stamp almost exclusively leads to a plastic deformation on the closing element guide body, while the valve seat remains unchanged on the valve piece.
  • FIG. 1 shows a section through a fuel injector with a solenoid valve with an integrated fuel return, wherein an armature stroke is set via a shim, according to the prior art.
  • the in FIG. 1 shown fuel injector 1 comprises an injector body 2, in which in a cylinder bore 3, which is introduced into a valve member 4, an axially movable injection valve member 5 is movably guided.
  • the injection valve member 5 is acted upon at one end face via the pressure prevailing in a control chamber 6 pressure.
  • the relief channel 8 opens into a conically countersunk region 12 on the outer end side of the valve piece 4.
  • the valve piece 4 is clamped in a flange 13 fixed by a screw 14 with the injector 2.
  • a valve seat 15 is formed, with which a closing element 16 of a solenoid valve actuating the injection valve 17 cooperates. That in the FIG. 1 Spherically shaped closing element 16 is partially enclosed by a closing element guiding body 18 adapted to the contour of the closing element 16.
  • the closing element guide body 18 bears against an end face 19 of an anchor bolt 21, which forms an anchor plate 22 a multi-part armature 20. This cooperates with an electromagnet 23 of the solenoid valve 17.
  • the armature plate 22 is mounted dynamically displaceable on the anchor bolt 21 under the action of its inertial mass against the biasing force of a return spring 24 and is pressed by the return spring 24 against a stop 25 on the anchor bolt 21.
  • the return spring 24 is supported on the housing side against a contact surface 26 of the anchor bolt 21 leading screw piece 14, which is clamped in the injector body 2. Also on the contact surface 26 is a shim 27, which limits the path of the armature plate 22 in the closing direction.
  • the anchor bolt 21 and the closing element 16 coupled with it, as well as the anchor plate 22 are constantly acted upon by a valve spring 28 which is fixed to the housing and bears against a valve spring adjustment disk 29 in the closing direction, so that the closing element 16 is normally in the closed position on the valve seat 15.
  • a valve spring 28 which is fixed to the housing and bears against a valve spring adjustment disk 29 in the closing direction, so that the closing element 16 is normally in the closed position on the valve seat 15.
  • a shim 30 of a thickness s determined in a measuring method is inserted, which defines an armature stroke of the closing element 16 in the clamped state of the magnetic valve 17 and injector body 2.
  • a measure a represents the situation when the electromagnet 23 is energized and gives the distance between the end face 19 of the anchor bolt 21, wherein the position of the end face 19 is designated 19 'in the energized state of the electromagnet 23 to the contact surface 31 on the solenoid valve 17 for classifying dial 30 in the open state of the injection valve member 5 again.
  • a measure b is determined on the injector body 2 in a state that simulates the closed position of the injection valve member 5.
  • the dimension b represents the distance between an end face 32 of the closing member guide body 18, which comes to rest with the end face 19 of the anchor bolt 21, to a bearing surface 33 on the injector body 2 for the shim 30 to be inserted.
  • the thickness s of the shim 30 results from the difference between the dimension a and the dimension b plus the set value of the armature stroke AH Soll , which in FIG. 2 designated by reference numeral 34.
  • the fixed armature stroke of the closing element 16 is measured.
  • the tolerance of the armature stroke is particularly dependent on the manufacturing tolerances of the individual components of the fuel injector 1 and can not be changed in the present fuel injector 1 without a complete disassembly of the fuel injector 1.
  • FIG. 3 the process of the invention is illustrated.
  • an embossing punch 35 is introduced by the integrated fuel return 11, which is adapted in its configuration of the geometry of the fuel return 11.
  • the die 35 shown in FIG. 4 , which is preferably made of a material which has a higher hardness / strength than that of the anchor bolt 21, comprises regions of different diameters, which give a stepped outer contour.
  • an end face 36 of the embossing punch 35 bears against a contact surface 37 of the anchor bolt 21 during the embossing process, whereby the embossing force introduced into the embossing punch 35 from above is transmitted via the contact surface 37 in the anchor bolt 21, via the closing element guide body 18, to the closing element 16.
  • the applied stamping force leads to deformation of the closing element guide body 18, in particular on a contact surface 38 of the closing element guide body 18 and for deformation of the valve piece 4, in particular in the tapered region 12 of the valve seat 15
  • Valve seat 15 resulting from the embossing change in shape can affect the flow conditions in the opening region of the discharge channel 8 on the valve seat 15 have.
  • Plastic deformation is therefore desired only on the closure element guide body 18.
  • a correspondingly modified design of the contact surface 38 on the closing element guide body 18 can be formed, as shown in FIG FIG. 5 is clarified.
  • the contact surface 38 on the closure element guide body 18 for receiving the closure element 16 has a contour which provides exposed regions 39 which, due to the plastic deformation introduced during the embossing process, approximate to the shape of the closure element 16.
  • the successful implementation of the method according to the invention sets in tensioned fuel injectors 1 an armature stroke AH is predicted, which is smaller than the desired armature stroke AH Soll .
  • the exact setting of the armature stroke AH Soll with small tolerance can be done by embossing.
  • embossing a distinction is made between a method which represents an achieved embossing depth as a function of the applied embossing force and a method which represents the embossing depth achieved as a function of the path of the embossing punch.
  • the prevailing armature stroke AH Ist in the strained fuel injector 1 which results after the assembly of the individual components, is first determined.
  • the embossing punch 35 is introduced into the fuel return 11 such that the end face 36 of the embossing punch 35 comes to lie against the contact surface 37 of the anchor bolt 21.
  • the embossing punch 35 is acted upon by a first embossing force with direction of action toward the anchor bolt 21, which leads to a deformation of the contact surface 38 on the closing member guide body 18 by impressing the closing element 16.
  • the now prevailing armature stroke AH is again measured.
  • armature stroke AH determined actual or from the target value of the armature stroke AH from target, then in a further embossing or steps can be changed with decreasing embossing forces of the armature travel until the desired armature stroke is achieved AH target with the desired tolerance.
  • prevailing stamping forces can be in a range of a few kN, whereby embossing depths up to a few microns can be achieved.
  • the prevailing armature stroke AH Ist is determined in the fuel injector 1.
  • a deviation of the prevailing armature lift AH is from the desired armature travel AH
  • the prevailing armature stroke AH Ist is determined and compared with the target value of the armature lift AH Soll . Depending on this, this process can be repeated until the desired result is achieved.
  • an active armature stroke adjustment can be achieved which avoids disassembly of the fuel injector and thus presents itself as extremely inexpensive and easy to handle.
  • embossing according to the invention not only the armature stroke can be adjusted, but also the narrowest tolerance ranges of the armature stroke are maintained, without causing high costs at the same time. Since this procedure is performed on the finished fuel injector, drastically reduces the amount of waste fuel injectors, which have previously proved unsuitable for further use, since their anchor strokes were outside the tolerance range.
  • the method according to the invention proves to be particularly advantageous with regard to the constancy of the injection quantity of fuel, since an armature lifting drift, which arises in the first operating times of the fuel injector, is anticipated by the stamping in of the closing element in particular.

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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)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Claims (9)

  1. Procédé de réglage de la course d'un induit en plusieurs parties (20) dans un injecteur de carburant (1) comportant une électrovanne (10) avec un retour de carburant (11), intégré et un corps d'injecteur (2) muni d'une pièce de soupape (4),
    l'induit (20) en plusieurs parties ayant un goujon d'induit (20) et une plaque d'induit (22) coulissant sur le goujon d'induit (21) ainsi qu'un organe de guidage d'élément d'obturation (18) entourant en partie un élément d'obturation (16),
    caractérisé en ce que
    dans la position de fermeture de l'élément d'obturation (16), le goujon d'induit (21) est sollicité par une force qui produit une déformation plastique modifiant la course d'induit.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la déformation plastique est produite sur l'organe de guidage d'élément d'obturation (18) .
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    la déformation plastique est produite sur une surface de contact (38) de l'organe de guidage (18) avec l'élément d'obturation (16).
  4. Procédé selon la revendication 1,
    caractérisé en ce que
    la déformation plastique est produite sur la surface frontale (19) de l'organe de guidage d'élément d'obturation (18).
  5. Procédé selon l'une des revendications 1 à 4,
    caractérisé par
    un poinçon de matriçage (35) introduit à travers le retour de carburant (11) de l'injecteur (1), pour exercer une force sur le goujon d'induit (21).
  6. Procédé selon l'une des revendications 1 à 5,
    caractérisé en ce que
    le poinçon de matriçage (35) est fabriqué en une matière de plus grande dureté et de plus grande résistance que la matière du goujon d'induit (21).
  7. Procédé selon l'une des revendications 1 à 6,
    caractérisé en ce que
    le réglage de la course de l'induit en plusieurs parties (20) comprend les étapes suivantes :
    a) mesure de la course d'induit actuelle (AHIst) de l'induit en plusieurs parties (20) de l'injecteur de carburant (1),
    b) application du poinçon d'impression (35) avec une force produisant une déformation plastique de l'organe de guidage d'élément d'obturation (18) et/ou de l'élément de soupape (4),
    c) mesure de la course d'induit modifiée (AHIst) de l'induit en plusieurs parties (20),
    d) répétition des étapes a)-d) jusqu'à ce que la course d'induit actuelle (AHIst) se situe dans une plage de tolérance prédéfinie de la course d'induit (AHSoll).
  8. Procédé selon l'une des revendications 1 à 6,
    caractérisé en ce que
    le réglage de la course de l'induit (20) en plusieurs parties comprend les étapes suivantes :
    a) mesure de la course actuelle (AHIst) de l'induit en plusieurs parties (20) de l'injecteur de carburant (1),
    b) application du poinçon d'impression (35) avec une force qui ne produit pas de déformation plastique,
    c) rapprochement du poinçon d'impression (35) en appliquant une force constante,
    d) mesure de la course d'induit modifiée (AHIst) de l'induit en plusieurs parties (20),
    e) répétition des étapes a)-d) jusqu'à ce que la course d'induit actuelle (AHIst) se situe dans une plage de tolérance prédéfinie de la course d'induit (AHSoll).
  9. Procédé selon l'une des revendications 1 à 8,
    caractérisé en ce que
    l'élément d'obturation (16) est fabriqué en nitrure de silicium.
EP06114059A 2005-07-12 2006-05-17 Arrangement actif de levée d'armature des injecteurs de carburant Not-in-force EP1744054B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005032461A DE102005032461A1 (de) 2005-07-12 2005-07-12 Aktive Ankerhubeinstellung bei Kraftstoffinjektoren

Publications (2)

Publication Number Publication Date
EP1744054A1 EP1744054A1 (fr) 2007-01-17
EP1744054B1 true EP1744054B1 (fr) 2008-03-05

Family

ID=36833410

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Application Number Title Priority Date Filing Date
EP06114059A Not-in-force EP1744054B1 (fr) 2005-07-12 2006-05-17 Arrangement actif de levée d'armature des injecteurs de carburant

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EP (1) EP1744054B1 (fr)
AT (1) ATE388323T1 (fr)
DE (2) DE102005032461A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009003208A1 (de) * 2009-05-19 2010-11-25 Robert Bosch Gmbh Verfahren zur Einstellung des Ventilhubes
FR2988021B1 (fr) * 2012-03-15 2015-01-09 Bosch Gmbh Robert Procede de realisation d'une soupape ainsi qu'outil de matricage d'une calotte dans la broche d'induit d'une soupape
DE102012010268B4 (de) * 2012-05-25 2014-01-30 L'orange Gmbh Verfahren zur Anwendung mit einem Injektor und Kraftstoffeinspritzeinrichtung zur Durchführung des Verfahrens
DE102013227063A1 (de) * 2013-12-23 2015-06-25 Robert Bosch Gmbh Kraftstoffinjektor
DE102016218515A1 (de) * 2016-09-27 2018-03-29 Robert Bosch Gmbh Verfahren zur Steuerung von schaltbaren Ventilen, insbesondere von Einspritzventilen einer Brennkraftmaschine eines Kraftfahrzeugs
DE102016219151A1 (de) * 2016-10-04 2018-04-05 Volkswagen Aktiengesellschaft Verfahren zum Herstellen einer Kalotte in einer Ventilnadel eines Ventils

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936425A1 (de) * 1979-09-08 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares kraftsoffeinspritzventil
DE3031564A1 (de) * 1980-08-21 1982-04-08 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisches kraftstoffeinspritzventil und verfahren zur herstellung eines elektromagnetischen kraftstoffeinspritzventiles
JPS5989876A (ja) * 1982-11-12 1984-05-24 Diesel Kiki Co Ltd 電磁弁の製造方法
EP0714481B1 (fr) * 1994-05-10 1999-03-03 Robert Bosch Gmbh Dispositif et procede de reglage d'une course de soupape
DE10257380A1 (de) * 2002-12-09 2004-07-15 Robert Bosch Gmbh Verfahren zur Einstellung von Abständen in magnetischen Kreisen

Also Published As

Publication number Publication date
EP1744054A1 (fr) 2007-01-17
ATE388323T1 (de) 2008-03-15
DE102005032461A1 (de) 2007-01-25
DE502006000423D1 (de) 2008-04-17

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