EP1346144A2 - Electrovanne pour piloter une soupape d'injection de moteur a combustion interne - Google Patents

Electrovanne pour piloter une soupape d'injection de moteur a combustion interne

Info

Publication number
EP1346144A2
EP1346144A2 EP01984782A EP01984782A EP1346144A2 EP 1346144 A2 EP1346144 A2 EP 1346144A2 EP 01984782 A EP01984782 A EP 01984782A EP 01984782 A EP01984782 A EP 01984782A EP 1346144 A2 EP1346144 A2 EP 1346144A2
Authority
EP
European Patent Office
Prior art keywords
armature
anchor bolt
solenoid valve
valve
stop part
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.)
Withdrawn
Application number
EP01984782A
Other languages
German (de)
English (en)
Inventor
Siegfried Ruthardt
Holger Rapp
Dirk Schoenfeld
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 EP1346144A2 publication Critical patent/EP1346144A2/fr
Withdrawn legal-status Critical Current

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
    • 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
    • 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
    • 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
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • Solenoid valve for controlling an injection valve of an internal combustion engine
  • the invention relates to a solenoid valve for controlling an injection valve of an internal combustion engine according to the preamble of claim 1.
  • Such a solenoid valve is used to control the fuel pressure in the control pressure chamber of an injection valve, for example in the injector of a common rail injection system.
  • the movement of a valve piston, with which an injection opening of the injection valve is opened or closed, is controlled via the fuel pressure in the control pressure chamber.
  • the known solenoid valve has an electromagnet arranged in a housing part, a movable armature and a control valve member which is moved with the armature and acted upon by a closing spring in the closing direction and which cooperates with a valve seat of the solenoid valve and thus the
  • a known disadvantage of the solenoid valves is the so-called armature bouncing.
  • the armature and with it the control valve member are accelerated from the closing spring of the solenoid valve to the valve seat by one Seal the fuel drain channel from the control pressure chamber.
  • the impact of the control valve member on the valve seat can result in disadvantageous oscillation and / or bouncing of the control valve member on the valve seat, as a result of which the control of the injection process is impaired.
  • the armature is therefore constructed in two parts with an armature bolt and an armature plate which is slidably mounted on the armature bolt, so that the armature plate moves further against the tension force of a return spring when the control valve member impacts the valve seat.
  • the return spring then conveys the anchor plate back to its starting position on a stop part of the anchor bolt.
  • the two-part design of the armature reduces the effectively braked mass and thus the kinetic energy causing the bouncing of the armature hitting the valve seat, but the armature plate can reverberate on the armature bolt in a disadvantageous manner after the solenoid valve has closed.
  • the prior art uses an overstroke stop, which limits the path by which the anchor plate can move on the anchor bolt.
  • the overstroke stop is arranged in a fixed manner in the housing of the solenoid valve between the anchor plate and a slide piece guiding the anchor bolt.
  • the fuel contained in the damping chamber generates a force that counteracts the movement of the anchor plate.
  • the swinging of the anchor plate is therefore strongly dampened.
  • the stop part facing the electromagnet for the armature plate on the armature bolt is designed in the form of a non-closed annular disc with a U-shaped recess which is pushed onto the armature bolt in the radial direction.
  • the armature plate has on its end facing the electromagnet an annular groove surrounding the armature bolt, which laterally encircles the ring disk in the finished magnetic valve, so that the ring disk is arranged flush with the end face and is secured by the ring groove against slipping off the armature bolt.
  • the anchor plate on the anchor bolt must be moved in the direction of the overstroke stop so that the open annular disc can be pushed laterally onto the annular groove of the anchor bolt.
  • the vonhubanschlag has an elaborate keyhole-like recess, which allows that the anchor plate can be guided radially to the anchor bolt with a portion through the fürhubanschlag after a displacement of the Uberhubanschlag.
  • the washer can then be pushed with the open side onto the anchor bolt in this position.
  • the ring disk is then encompassed by the annular groove of the anchor plate and the overstroke stop is moved into the working position in which the anchor plate cannot reach through the keyhole-like recess of the overstroke stop.
  • the solenoid valve according to the invention with the characterizing features of claim 1 enables a considerable simplification in the manufacture of the solenoid valve.
  • the stop part can advantageously also be secured against slipping off the anchor bolt in the radial direction without securing elements formed on the anchor plate.
  • the elaborate keyhole-like recess of the overstroke stop can be omitted and replaced by a simple circular opening.
  • the overstroke stop no longer has to be moved laterally, since the anchor plate no longer has to pass through the overstroke stop with one section during assembly. This enables a considerable ease of assembly and cost savings.
  • the solenoid valve can be simplified by directly designing an end face of the slide element guiding the anchor bolt as an overstroke stop and the free sliding path of the anchor plate on the anchor bolt being suitably selected by choosing the thickness of the stop part. There is no need for a separately manufactured disc part as an overstroke stop.
  • the armature plate with its flat end facing the electromagnet comes to rest against the stop part.
  • the annular groove of the anchor plate provided in the prior art for receiving the stop part can be omitted. Additional costs can thus advantageously be saved in the manufacture of the anchor plate.
  • the end face of the armature plate attracted by the electromagnet is also extended. spaced from this by a narrow gap. It is therefore advantageously provided that the stop part fixed on the anchor bolt engages in a through recess of the electromagnet.
  • the through-hole also serves to accommodate the valve closing spring and as a fuel return.
  • the stop part is designed as an annular or partially annular metallic sleeve part and is welded to the anchor bolt.
  • the stop part can be designed as a spring-elastic part which can be snapped onto the anchor bolt. These measures make it much easier to fix the stop part on the anchor bolt.
  • the stop part can advantageously be designed as an elastically flexible crescent-shaped disk part with an opening delimited by the two end sections of the crescent-shaped disk part, the clear width of the two end sections being smaller than the diameter of an annular groove of the anchor bolt in which the crescent-shaped disk part is used to secure it axial position is fixed.
  • FIG. 1 shows a cross section through the upper part of a fuel injector known from the prior art with a solenoid valve
  • FIG. 2 shows a partial cross section of the solenoid valve known from the prior art with an overstroke stop
  • 3 shows a section through the stop part of the known solenoid valve perpendicular to the plane shown in FIG. 2,
  • FIG. 4 shows a partial cross section through a solenoid valve according to a first embodiment of the invention
  • FIG. 5 shows a partial cross section through a solenoid valve according to a second embodiment of the invention
  • FIG. 6 shows a section through the stop part from FIG. 5 perpendicular to the cross-sectional plane shown there.
  • the fuel injector 1 shown has a valve housing 4 with a longitudinal bore 5, in which a valve piston 6 is arranged, which acts with its one end on a valve needle arranged in a nozzle body, not shown.
  • the valve needle is arranged in a pressure chamber which is supplied with fuel under high pressure via a pressure bore 8.
  • the valve needle is raised against the closing force of a spring by the high fuel pressure in the pressure chamber, which constantly acts on a pressure shoulder of the valve needle.
  • valve piston 6 By lowering the valve piston 6, the valve needle is pressed into the valve seat of the injection valve in the closing direction and the injection process is ended.
  • the valve piston 6 is guided at its end facing away from the valve needle in a cylinder bore 11 which is introduced into a valve piece 12 which is inserted into the valve housing 4. In the cylinder bore 11, the end face 13 of the
  • Valve piston 6 a control pressure chamber 14, which is connected via an inlet channel to a high-pressure fuel connection.
  • the inlet channel is essentially made up of three parts.
  • a bore leading radially through the wall of the valve piece 12, the inner walls of which form an inlet throttle 15 over part of its length, is continuously connected to an annular space 16 surrounding the valve piece on the circumference, which annular space in turn is connected via a fuel filter inserted into the inlet channel permanent connection with the high-pressure fuel connection of a screwed into the valve housing 4 connecting piece 9 is.
  • the annular space 16 is sealed off from the longitudinal bore 5 by a sealing ring 39.
  • the control pressure chamber 14 is exposed to the high fuel pressure prevailing in the high-pressure fuel reservoir via the inlet throttle 15.
  • Coaxial to the valve piston 6 branches off from the control pressure chamber 14 a bore running in the valve piece 12, which forms a fuel outlet channel 17 provided with a discharge throttle 18, which opens into a relief chamber 19, which is connected to a fuel pressure connection 10, which in turn is connected to not shown is connected to a fuel return of the injection valve 1.
  • the fuel drain channel 17 emerges from the valve piece 12 in the region of a conically countersunk part 21 of the outer end face of the valve piece 12.
  • the valve piece 12 is firmly clamped to the valve housing 4 in a flange area 22 via a screw member 23.
  • a valve seat 24 is formed in the conical part 21, with which a control valve member 25 of an injection valve valve controlling solenoid valve 30 cooperates.
  • the control valve member 25 is coupled to a two-part armature in the form of an armature bolt 27 and an armature plate 28, which armature interacts with an electromagnet 29 of the solenoid valve 30.
  • the solenoid valve 30 comprises a housing part 60 which accommodates the electromagnet and which is firmly connected to the valve housing 4 via screwable connecting means 7.
  • the anchor plate 28 is dynamically slidably supported on the anchor bolt 27 under the action of its inertial mass against the biasing force of a return spring 35 and is pressed by this return spring in the idle state against a stop part 26 fixed on the anchor bolt.
  • the return spring 35 is fixed to the housing on a flange 32 of a slide 34 guiding the anchor bolt 27, which is firmly clamped with this flange between a spacer 38 placed on the valve piece 12 and the screw member 23 in the valve housing.
  • the armature bolt 27 and with it the armature disk 28 and the control valve member 25 coupled to the armature bolt are constantly acted upon in the closing direction by a locking spring 31 which is fixed to the housing, so that the control valve member 25 normally abuts the valve seat 24 in the closed position.
  • the spacer 38 arranged between the flange 32 and the valve piece 12 serves to set the opening stroke.
  • the opening and closing of the injection valve is controlled by the solenoid valve 30 as described below.
  • the anchor bolt 27 is constantly acted upon by the closing spring 31 in the closing direction, so that the control valve member 25 rests on the valve seat 24 in the closed position when the electromagnet is not energized, and the control pressure chamber 14 is closed to the relief side 19, so that the high one there very quickly via the inlet channel Builds up pressure that is also present in the high-pressure fuel reservoir.
  • the pressure in the control pressure chamber 14 Over the surface of the end face 13, the pressure in the control pressure chamber 14 generates a closing force on the valve piston 6 and the valve needle connected therewith, which is greater than the forces acting in the opening direction as a result of the high pressure. If the control pressure chamber 14 is opened towards the relief side 19 by opening the solenoid valve, the pressure in the small volume of the control pressure chamber 14 decreases very quickly, since the latter is not coupled directly to the high pressure side but via the inlet throttle 15. As a result, the force acting on the valve needle in the opening direction outweighs that on the
  • Valve needle applied fuel high pressure so that the valve needle moves upward and the at least one injection opening is opened for injection.
  • the solenoid valve 30 closes the fuel outlet channel 17
  • the pressure in the control pressure chamber 14 can be built up again by the fuel flowing in via the inlet channel 15, so that the original closing force is applied and the valve needle of the fuel injection valve closes.
  • the closing spring 31 suddenly presses the armature pin 27 with the control valve member 25 against the valve seat 24.
  • a disadvantageous bouncing off or swinging of the control valve member arises in that the impact of the armature pin on the valve seat causes the same to deform, which acts as an energy store acts, with some of the energy in turn being transmitted to the control valve member, which then bounces off the valve seat 24 together with the anchor bolt.
  • the known solenoid valve shown in FIG. 1 therefore uses a two-part armature with an armature plate 28 decoupled from the armature bolt 27.
  • the stop part 26 When mounting the solenoid valve 30, the stop part 26 must be fixed on the anchor bolt 27.
  • the stop part 26 is in the form of a non-closed annular disc with a U-shaped recess, as can best be seen in FIG. 3.
  • the washer 26 is inserted into an annular groove 46 of the anchor bolt and is thereby axially secured in its position.
  • the distance a between the two legs of the U-shaped washer is somewhat larger than the diameter d of the anchor bolt 27.
  • the anchor plate 28 In order to be able to slide the washer 26 with the opening onto the anchor bolt 27, the anchor plate 28 must be moved downward to the overstroke stop 70 , As can be seen in FIG. 2, the disk-shaped overstroke stop 70 has a keyhole-like recess 71 for this purpose.
  • the overstroke stop 70 is shifted to the right in FIG. 2.
  • the anchor plate 28 can then are pressed down and thereby engages with the lower nozzle 55 through the recess 71. In this position, the annular disk 26 can be pushed laterally over the anchor bolt.
  • the anchor plate 28 is then released again and pressed against the annular disk 26 by the tension force of the return spring 35.
  • the overstroke stop 70 is now shifted to the left into the end position shown in FIG. 2 and locked in this position.
  • the anchor plate 28 has a recess 41 in the form of an annular groove. When the anchor plate 28 springs back, the recess 41 surrounds the annular disk 26, so that it is also secured to the anchor bolt in the radial direction.
  • This solution which is known in the prior art, requires a special design of the overstroke stop 70 and the anchor plate 28.
  • FIG. 4 shows a first exemplary embodiment of the solenoid valve according to the invention.
  • the same parts are provided with the same reference numerals.
  • the part shown is installed in the solenoid valve 30 instead of the part shown in FIG. 2.
  • the anchor plate 28 has no annular groove.
  • the flat end face 47 of the armature plate 28 facing the electromagnet 29 is spaced from the electromagnet by a minimal distance 49, which is not less, than in the known solenoid valves. The minimum distance is maintained by the stop of the annular shoulder 33 on the slide 35.
  • the flat end face 47 of the anchor plate 28 comes to rest directly against a stop part 26 which is designed as a metallic sleeve which is pushed over the anchor bolt 27 and welded to the cylindrical lateral surface 45 of the anchor bolt at the points 56 is.
  • a stop part 26 which is designed as a metallic sleeve which is pushed over the anchor bolt 27 and welded to the cylindrical lateral surface 45 of the anchor bolt at the points 56 is.
  • Other integral or non-positive connection types are also conceivable.
  • the sleeve is pushed onto the anchor bolt until the lock sliding distance of the anchor plate to the overstroke stop 70 corresponds to the predetermined value.
  • the sleeve encompassing the anchor bolt by more than 180 ° can be annular or also only partially annular.
  • the stop part 26 engages in a through recess 37 of the electromagnet, in which the closing spring 31 is also arranged.
  • the overstroke stop 70 has no keyhole-like recess, but only a circular opening for the passage of the anchor bolt 27.
  • the design of the solenoid valve is thus significantly simpler and cheaper than in the prior art. It is understood that in the exemplary embodiment shown, the overstroke stop 70 does not have to be provided as a separate disk part, but can also be formed, for example, by the end face of the slider 35 facing the anchor plate.
  • FIGS. 5 and 6 Another particularly advantageous exemplary embodiment is shown in FIGS. 5 and 6.
  • the anchor bolt 27 is provided with an annular groove 46.
  • the stop part 26 is designed as a spring-elastic part which can be snapped onto the anchor bolt in the region of the annular groove 46.
  • the resilient part 26 is designed as an elastically flexible crescent-shaped disc part made of metal or another suitable material with an opening 53 delimited by the two end sections 51, 52 of the crescent-shaped disc part.
  • the inside width b of the two end sections 51, 52 is smaller than the diameter d of the annular groove 46 of the anchor bolt 27.
  • the stop part 26 is clipped onto the anchor bolt in the region of the annular groove 46, the end sections 51, 52 initially being prestressed against the anchor bolt are and then spring back elastically and so enclose the circumference of the anchor bolt by more than 180 °, whereby the stop member 26 is secured in the radial direction on the anchor bolt 27. A displacement in the axial direction is avoided by the annular groove 46.
  • the end face 47 of the armature plate 28 facing the electromagnet 29 is flat and is pressed in the idle state by the tension force of the return spring 35 against the crescent-shaped disk part 26 which engages in the through opening 37 of the electromagnet.
  • the installation of the stop part is particularly simple, since the stop part is only snapped onto the anchor bolt like a spring clip.
  • the overstroke stop 70 cannot be provided as a separate disk part and can be formed by the end face of the slider 35 facing the anchor plate 28.

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)
  • Manufacturing & Machinery (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une électrovanne permettant de piloter une soupape d'injection de moteur à combustion interne, comprenant un électroaimant (29), un induit mobile muni d'une plaque d'induit (28) et d'un boulon d'induit (27), ainsi qu'un élément de soupape de commande (25) déplacé avec l'induit et coopérant avec un siège de soupape (24), destiné à ouvrir et à fermer un canal d'évacuation de carburant (17) d'une chambre de pression de commande (14) de la soupape d'injection (1). La plaque d'induit (28) est montée à déplacement coulissant sur le boulon d'induit (27) sous l'effet de sa masse inerte dans le sens de fermeture de l'élément de soupape de commande (25) à l'encontre de la force de serrage d'un ressort de rappel (35) agissant sur la plaque d'induit (28). Lorsqu'elle se trouve en position de repos, ladite plaque d'induit est déplacée par le ressort de rappel (35) pour être comprimée contre une pièce de butée (26) placée sur le boulon d'induit (27). Ladite pièce de butée (26) se présente de manière à entourer en périphérie, de plus de 180 DEG le boulon d'induit, dans un plan perpendiculaire au sens de mouvement du boulon d'induit.
EP01984782A 2000-12-19 2001-11-28 Electrovanne pour piloter une soupape d'injection de moteur a combustion interne Withdrawn EP1346144A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10063193A DE10063193A1 (de) 2000-12-19 2000-12-19 Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
DE10063193 2000-12-19
PCT/EP2001/013919 WO2002050424A2 (fr) 2000-12-19 2001-11-28 Electrovanne pour piloter une soupape d'injection de moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP1346144A2 true EP1346144A2 (fr) 2003-09-24

Family

ID=7667725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01984782A Withdrawn EP1346144A2 (fr) 2000-12-19 2001-11-28 Electrovanne pour piloter une soupape d'injection de moteur a combustion interne

Country Status (5)

Country Link
US (1) US20030141475A1 (fr)
EP (1) EP1346144A2 (fr)
JP (1) JP2004516407A (fr)
DE (1) DE10063193A1 (fr)
WO (1) WO2002050424A2 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005017267A1 (de) * 2005-04-14 2006-10-19 Robert Bosch Gmbh Vormontierte Ankergruppe für Common Rail Injektor
ATE479018T1 (de) * 2006-06-15 2010-09-15 Fiat Ricerche Brennstoffeinspritzventil
DE102006045357A1 (de) * 2006-09-26 2008-04-03 Robert Bosch Gmbh Sicherungsscheibe für ein Magnetventil
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WO2002050424A2 (fr) 2002-06-27
DE10063193A1 (de) 2002-06-27
US20030141475A1 (en) 2003-07-31
WO2002050424A3 (fr) 2002-09-12
JP2004516407A (ja) 2004-06-03

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