EP2496824B1 - Ensemble soupape de commande - Google Patents

Ensemble soupape de commande Download PDF

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Publication number
EP2496824B1
EP2496824B1 EP10768197.5A EP10768197A EP2496824B1 EP 2496824 B1 EP2496824 B1 EP 2496824B1 EP 10768197 A EP10768197 A EP 10768197A EP 2496824 B1 EP2496824 B1 EP 2496824B1
Authority
EP
European Patent Office
Prior art keywords
control valve
actuator
guide rod
pressure
valve arrangement
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.)
Active
Application number
EP10768197.5A
Other languages
German (de)
English (en)
Other versions
EP2496824A1 (fr
Inventor
Nestor Rodriguez-Amaya
Siegfried Ruthardt
Holger Rapp
Wolfgang Stoecklein
Bernd Berghaenel
Marco Beier
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 EP2496824A1 publication Critical patent/EP2496824A1/fr
Application granted granted Critical
Publication of EP2496824B1 publication Critical patent/EP2496824B1/fr
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Anticipated expiration legal-status Critical

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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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils

Definitions

  • the invention relates to control valve arrangements on a control chamber, in particular of a fuel injector, with an electromagnetic actuator actuating the valve arrangement.
  • A1 known fuel injector for controlling the injectors, a nozzle needle whose nozzle distal end formed in the manner of a plunger and displaceable in a control chamber which communicates via an inlet throttle with the high pressure side of the fuel injector and is connectable via a control valve arrangement with the low pressure side of the fuel injector.
  • the control chamber is connected with the control valve arrangement closed only with the high pressure side of the fuel injector, while the pressure in the control chamber with open control valve assembly as a result of the then existing connection with the low pressure side drops.
  • the nozzle needle is pushed into its closed position.
  • the control chamber has an outlet channel which opens out to the low-pressure side of a valve body and which is controlled by the control valve arrangement.
  • the control valve arrangement has a sleeve-shaped closing body, which is arranged displaceably on an equiaxed to the outlet guide rod, wherein the annular gap between the outer circumference of the guide rod and the inner periphery of the sleeve-shaped closing body is designed as a virtually leak-free sealing gap.
  • the sleeve-shaped closing body cooperates with a concentric with the mouth of the outlet channel seat and is connected to an armature, which in turn cooperates with a coaxial to the guide rod solenoid assembly.
  • the invention provides that the control chamber pressure an elastically deformable or movable against elastic resistance part, which leads or bundles the magnetic field of the actuator loaded, wherein movement or deformation-dependent electrical or magnetic parameters of the actuator for determining correlated with the control chamber pressure operating times or parameters are evaluated.
  • the invention makes use of the knowledge that the control chamber pressure at the beginning and end of the injection phase of a fuel injector changes significantly.
  • an intervention into the magnetic field of the actuator analogous to the control chamber pressure can be carried out by evaluating the time profile of the electrical voltage or of the electric current Actuator the operation of the fuel injector with high Precision recorded and monitored.
  • the actuator thus assumes a dual function by not only serving to actuate the control valve assembly but also as a sensor for the operating phases of the fuel injector.
  • control valve arrangement has a sleeve-shaped closing body which is displaceably guided on a guide rod and which is connected to an armature of an electromagnet arrangement forming the actuator. It is further provided that the present within the sleeve-shaped closing body fluid pressure on the guide rod on the deformable or movable part is ablatable, as defined in the characterizing part of claim 1.
  • This part can be designed as a deformable or movable part of a rod axis radial bottom of a pole piece of the serving as an actuator solenoid. By deformation or displacement of this soil, the relative position of the pole pieces can be changed, at the same time the electrical or magnetic parameters of the electromagnet are changed.
  • Fig. 1 is within a injector body 1, a high-pressure chamber 2 and a low-pressure chamber 3 is arranged. These two spaces are separated from each other by a valve piece 4.
  • the high pressure chamber 2 communicates via an inlet channel 5 with a high pressure fuel source, not shown, for fuel, usually a so-called common rail.
  • the low-pressure space 3 is connected via a non-illustrated return line or the like to a fuel tank or the like.
  • the high pressure chamber 2 is connected via injection nozzles, not shown, with the combustion chamber of an internal combustion engine, also not shown.
  • the injection nozzles are controlled in a known manner by means of a nozzle needle, from the in Fig. 1 only the nozzle-distal end, which is designed as a plunger 6, is shown.
  • the plunger 6 is arranged displacer-effective in a control chamber 7 arranged in the valve piece 4.
  • This control chamber communicates via an inlet throttle 8 with the high-pressure chamber 2 and via an outlet throttle 9 with the low-pressure chamber 3, wherein the outlet throttle 9 is controlled by means of a control valve assembly 10.
  • the control valve assembly 10 has a sleeve-shaped closing body 11, which is tensioned by a closing spring 12, which is designed as a helical compression spring against a concentric to the outlet port of the flow channel 9 seat.
  • a closing spring 12 which is designed as a helical compression spring against a concentric to the outlet port of the flow channel 9 seat.
  • the seat is designed as a plane surface on which the sleeve-shaped closing body 11 is seated with a linear annular edge. In principle, however, a seat of a different shape may also be provided.
  • the sleeve-shaped closing body 11 is axially displaceably guided on a guide axis 13, which is equiaxial to the longitudinal axis 100 of the injector body 1, wherein the annular gap between the inner periphery of the closing body 11 and the outer circumference of the guide rod 13 is formed as a virtually leak-free throttle gap.
  • the in Fig. 1 shown closed position occupies the pressure chamber 14 formed within the closing body 11, which communicates via the flow channel 9 with the control chamber 7 and, accordingly, the same fluid pressure as the control chamber 7, shut off from the low-pressure chamber 3.
  • a star-shaped armature 15 of an electromagnet arrangement 16 is arranged, which is provided as an actuator for actuating the control valve arrangement 10.
  • the solenoid assembly 16 has in a known manner a magnetic coil 17, which is arranged within a concentric to the guide rod 13 Polschuhan extract with an annular outer pole 18 and an annular inner pole 19. If the magnetic coil 17 is energized electrically, the armature 15 is magnetically attracted by the poles 18 and 19, so that the closing body 11 is lifted against the force of the closing spring 12 from its seat and the control valve assembly 10 is opened.
  • the control chamber pressure by means of the guide rod 13 to a in Fig. 1 only schematically illustrated transfer 20 remove the electromagnetic parameters of the solenoid assembly 16 changes such that the closing times of the nozzle needle can be detected by appropriate evaluation of the electric current-voltage curve at the solenoid 17.
  • the solenoid assembly 16 also assumes sensor functions in addition to their actuator function, and the guide rod 13 has, in addition to its guide function for the closing body 11, the object of a control element for changing parameters of the electromagnet arrangement 16.
  • the Fig. 3 shows now a first not falling under claim 1 example of a possibility of changing the parameters of the solenoid assembly 16.
  • the pressure in the pressure chamber 14 dependent axial force of the guide rod 13 is removed to an elastically bendable bottom 21, which forms part of the Polschuhan extract and with the Tru 18 and 19 is connected.
  • the air gap between the inner pole 19 and the armature 15 changes, that is, with an increase in the pressure in the control chamber 7 and the associated increase in pressure in the pressure chamber 14, the air gap between the armature 15 and inner pole 19 is increased.
  • the control chamber pressure increases immediately after the closing time of the nozzle needle, at this time increases the force acting on the bottom 21 axial force of the guide rod 13 and causes an increase in the air gap between the inner pole 19 and armature 15. If there is a residual flux in the magnetic circuit at this time, Thus, the enlargement of the aforementioned air gap causes a change in the coil voltage (at vanishing coil current) or a change in the coil current (at vanishing coil voltage). If there is no sufficient residual magnetic flux, the solenoid 12 is energized weakly before the expected closing time of the nozzle needle to re-establish magnetic flux. The degree of energization is chosen so low that the closing body 11 remains in its closed position.
  • the outer pole 18 is arranged stationarily in the injector body 1 separately from the base 21, wherein an air gap 22 remains between the base 21 and the outer pole 18.
  • This air gap changes as a function of the axial force of the guide rod 13.
  • the associated changes in the magnetic flux of the solenoid assembly 16 thus in turn open up the possibility of accurately detecting the closing time of the nozzle needle.
  • the inner pole 19 and the outer pole 18 form a pole shoe arrangement which is separate from the flexible base 21 and whose bridge region is formed between the poles 18 and 19 with a comparatively small cross section.
  • bottom 21 abuts a facing annular web of the pole piece, such that an air gap 23 is generated.
  • This air gap changes its gap as a function of the elastic deflection of the bottom 21 and accordingly in dependence on the axial force of the guide rod 13.
  • This changes the magnetic resistance, which opposes the magnetic flux between the poles 19 and 20.
  • the associated repercussions on the electric current-voltage curve at the magnetic coil 17 in turn provide the opportunity to detect the closing time of the nozzle needle.
  • the embodiment of the Fig. 6 differs from the embodiment of the Fig. 5 essentially only in that the flexible bottom 21 rests on a ring land on the back of the inner pole 19 and an elastic gap 24 is changed in elastic bending of the bottom 21. Functionally thus apply to the embodiment of Fig. 6 the comments on the embodiment of Fig. 5 ,
  • This web 25 is in the example of Fig. 7 provided on the side facing away from the armature 15 end face of the solenoid coil 17.
  • the flexible bottom 21 is arranged and designed such that it rests on vanishing axial force of the guide rod 13, that is at a correspondingly low pressure in the control chamber 7 and in the pressure chamber 14, on the facing end faces of the poles 18 and 19.
  • the bottom 21 which consists of a magnetically good conductive material, a magnetically good conductive connection between the poles 18 and 19.
  • FIG. 8 A functionally similar embodiment is in Fig. 8 shown.
  • This embodiment differs from the embodiment Fig. 7 merely in that the nonmagnetic web 25 'is arranged on the side of the magnet coil 17 facing the armature 15. If the guide rod 13 is free of axial force, the bottom 21 is in turn on the facing end faces of the poles 18 and 19, and with a corresponding axial force of the guide rod 13, the air gap 26 'is formed at the inner pole.

Claims (5)

  1. Ensemble soupape de commande (10) pour un espace de commande (7) d'un injecteur de carburant, comprenant un actionneur électromagnétique (15, 16) actionnant l'ensemble soupape (10), la pression de l'espace de commande pouvant être transmise à une partie déformable élastiquement (21), laquelle guide ou focalise un champ électromagnétique de l'actionneur (15, 16), des paramètres électromagnétiques, dépendant de la déformation, de l'actionneur (15, 16) pouvant être détectés pour déterminer, au moyen d'un dispositif d'évaluation, des instants corrélés avec la pression de l'espace de commande, un corps de fermeture (11) en forme de douille guidé de manière déplaçable sur une tige de guidage (13) étant prévu, lequel est relié à une armature (15) d'un ensemble d'électro-aimant (16) prévu en tant qu'actionneur, et une pression de fluide se produisant à l'intérieur du corps de fermeture (11) en forme de douille pouvant être transmise à la partie déformable (21) par le biais de la tige de guidage (13), caractérisé en ce qu'un pôle interne annulaire (19) et un pôle externe annulaire (18) sont associés à un fond commun (21) faisant office de partie déformable élastiquement, un entrefer (23, 24, 26, 26') pouvant être modifié par déformation du fond étant disposé entre le fond (21) et l'un des pôles (18, 19).
  2. Ensemble soupape de commande selon la revendication 1,
    caractérisé en ce que
    l'ensemble d'électro-aimant (16) comprend une bobine magnétique électrique (17) avec un ensemble d'épanouissement polaire (18, 19) déformable au moyen de la tige de guidage (13).
  3. Ensemble soupape de commande selon la revendication 2,
    caractérisé en ce
    qu'un entrefer entre l'ensemble d'épanouissement polaire (18, 19) et l'armature (15) peut être modifié par déformation de l'ensemble d'épanouissement polaire.
  4. Ensemble soupape de commande selon la revendication 1,
    caractérisé en ce que
    la tige de guidage (13) est supportée sur une région centrale du fond (21).
  5. Procédé de fonctionnement d'un ensemble soupape de commande selon l'une quelconque des revendications 1 à 4,
    caractérisé
    en ce que le champ électromagnétique de l'actionneur peut être modifié en fonction de la pression de fluide et
    en ce que des courants et/ou des tensions électriques au niveau de l'actionneur sont détectés et évalués à l'aide du dispositif d'évaluation.
EP10768197.5A 2009-11-03 2010-09-30 Ensemble soupape de commande Active EP2496824B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009046332A DE102009046332A1 (de) 2009-11-03 2009-11-03 Steuerventilanordnung
PCT/EP2010/064516 WO2011054607A1 (fr) 2009-11-03 2010-09-30 Ensemble soupape de commande

Publications (2)

Publication Number Publication Date
EP2496824A1 EP2496824A1 (fr) 2012-09-12
EP2496824B1 true EP2496824B1 (fr) 2015-02-25

Family

ID=43064764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10768197.5A Active EP2496824B1 (fr) 2009-11-03 2010-09-30 Ensemble soupape de commande

Country Status (3)

Country Link
EP (1) EP2496824B1 (fr)
DE (1) DE102009046332A1 (fr)
WO (1) WO2011054607A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012206586A1 (de) * 2012-04-20 2013-10-24 Robert Bosch Gmbh Verfahren zum Betreiben eines Kraftstoffinjektors
DE102012223244A1 (de) 2012-12-14 2014-06-18 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102013222650A1 (de) 2013-06-10 2014-12-11 Robert Bosch Gmbh Brennstoffeinspritzventil

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2231630A1 (de) * 1972-06-28 1974-01-17 Volkswagenwerk Ag Verfahren und einrichtung zur funktionspruefung eines elektromagnetischen ventils, insbesondere eines kraftstoff-einspritzventils
DE19930309C2 (de) * 1999-07-01 2001-12-06 Siemens Ag Verfahren und Vorrichtung zur Regelung der Einspritzmenge bei einem Kraftstoffeinspritzventil mit Piezoelement-Aktor
DE102007060396A1 (de) 2007-12-03 2009-06-04 Robert Bosch Gmbh Mechanische Löschung von Schließprellern bei Einspritzdüsen

Also Published As

Publication number Publication date
WO2011054607A1 (fr) 2011-05-12
DE102009046332A1 (de) 2011-05-05
EP2496824A1 (fr) 2012-09-12

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