EP2531715B1 - Ensemble soupape de commande d'un injecteur de carburant - Google Patents

Ensemble soupape de commande d'un injecteur de carburant Download PDF

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Publication number
EP2531715B1
EP2531715B1 EP11700513.2A EP11700513A EP2531715B1 EP 2531715 B1 EP2531715 B1 EP 2531715B1 EP 11700513 A EP11700513 A EP 11700513A EP 2531715 B1 EP2531715 B1 EP 2531715B1
Authority
EP
European Patent Office
Prior art keywords
guide rod
fuel injector
face
control valve
projection
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
EP11700513.2A
Other languages
German (de)
English (en)
Other versions
EP2531715A1 (fr
Inventor
Bjoern Scholemann
Helmut Clauss
Lorenz Zerle
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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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2531715A1 publication Critical patent/EP2531715A1/fr
Application granted granted Critical
Publication of EP2531715B1 publication Critical patent/EP2531715B1/fr
Active legal-status Critical Current
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
    • 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
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • 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
    • F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
    • 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
    • F02M2200/9015—Elastomeric or plastic 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
    • 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
    • F02M63/008—Hollow valve members, e.g. members internally guided

Definitions

  • the invention relates to a control valve arrangement of a fuel injector according to the preamble of claim 1 or 2.
  • a fuel injector with such a control valve assembly is known from DE 10 2006 050 045 A1 known.
  • the fuel injector shown in this document has to control its injection nozzle, a nozzle needle which is connected to a plunger, which works in a displacement chamber Verdränger whatsoever.
  • the control chamber is connected via an input-side throttle line with a high-pressure fuel source usually a so-called common rail, and can communicate on the output side via a control valve arrangement with a low pressure side of the fuel injector.
  • the control valve arrangement opens, the pressure in the control chamber drops sharply, whereby the nozzle needle is displaced into its injection position releasing the injection nozzles and the plunger connected to the nozzle needle is pushed into the control chamber.
  • the control valve assembly has a sleeve-shaped closing body, which is aligned coaxially with an output bore of the control chamber and slidably disposed on an equiaxial to the output bore guide rod.
  • the sleeve-shaped closing body In the closed position, the sleeve-shaped closing body cooperates with a concentric to the output bore annular seat, closing body and seat are suitably designed so that the closing body contacts the seat on a ring line in its closed position, the diameter of the inner diameter of the sleeve-shaped closing body and the outer diameter of the guide rod equivalent.
  • control valve arrangement The special The advantage of this control valve arrangement is that the high pressure occurring in the control chamber in the closing phase of the control valve arrangement exerts only radial forces on the sleeve-shaped closing body, but no forces in the axial direction. Accordingly, the closing body with actuators low power and operate largely free of inertia.
  • the guide rod is acted upon on its the output hole of the control chamber opposite end face in the closing phase of the closing body of the high pressure in the control chamber and must therefore be axially supported or anchored to a stationary part of the injector body. It is basically advantageous if there is no firm connection between the stationary part and the facing end of the guide rod, but the guide rod is supported only on impact on the stationary part.
  • the guide rod in the assembly of the fuel injector readily assume a position optimal for the toroid, without a fixed connection with a Guide rod axially supporting stationary part of the injector body to be prevented.
  • a limited wobbling mobility of the guide rod is made possible by the "loose" support of the guide rod on the stationary part. This is advantageous because it offers the closing body the opportunity to assume an optimal closed position on the assigned seat.
  • de guide rod has a plastically deformable end face and cooperates with a projection on a stationary part of the injector body.
  • the single FIGURE shows a fragmentary axial section of a fuel injector with control valve arrangement according to the invention.
  • the detail shown fuel injector has a multi-part injector body 1 with a valve body 2.
  • a control chamber 3 in which a plunger 4 operates Verdränger relatively, which is connected to a nozzle needle, not shown for controlling injectors, not shown.
  • the control chamber 3 communicates constantly via a throttle line 5 shown only schematically, which can enforce deviating from the graphic representation of the valve body 2, with a high-pressure source 100, usually a common rail.
  • a throttled outlet bore 6 for the control chamber 3 is arranged within the valve body 2.
  • This output bore 6 is controlled by a sleeve-shaped closing body 7, which cooperates with a concentric to the output bore 6, annular seat 8 on the upper end face of the valve body 2 in the drawing.
  • the outlet bore 6 is connected to a low-pressure space 9 provided in the injector body 1, which in turn communicates with a low-pressure region of an injection system, for example a pressureless tank 10.
  • a guide rod 11 is arranged, on which the closing body 7 is slidably disposed.
  • the annular gap between the outer circumference of the guide rod 11 and the inner circumference of the sleeve-shaped closing body 7 is formed as a sealing gap.
  • an armature 12 is arranged, which cooperates with an annular electromagnet arrangement 13.
  • the closing body 7 is tensioned against its seat 8.
  • the armature 12 and the closing body 7 are lifted against the force of the helical compression spring 14 from the illustrated closed position of the closing body 7 and placed in an upper end position in which the armature 12 on the annular pole pieces 13 'and 13 "of Electromagnet assembly 13.
  • the helical compression spring 14 returns the closing body 7 to the illustrated closed position.
  • the lower end of the guide rod 11 is acted upon by the hydraulic pressure within the closing body 7, so that the guide rod 11 is pushed with its upper end in the drawing against a bottom part 15 of the injector body 1.
  • the contact point between the guide rod 11 and the bottom part 15 is defined by the radial positions of several assembled components. Accordingly, the exact position of the contact point can be optimally determined only after installation. An optimal, positive fit for fixing the upper end of the guide rod 11 on the bottom part 15 can thus be done only after installation of the fuel injector and not in the item production of the bottom part 15.
  • the upper end face of the guide rod 11 is formed spherical and the bottom part 15 at least in the vicinity of the point of contact with the guide rod 11 consists of a plastically deformable material, the guide rod 11 in the bottom part 15 a forming a cup-shaped bed.
  • the effect is exploited that the spherical end face of the guide rod 11 with the facing end face of the bottom part 15 initially only a punctiform contact zone, so that the force acting on the lower end of the guide rod 11 fluid forces are removed to an extremely small area of the bottom part 15 and the aforementioned plastic deformation occurs.
  • guide rod 11 and bottom part 15 can be readily selected in a suitable manner, as a rule, it is sufficient if the guide rod 11 made of hardened steel and the bottom part 15 in the contact point of non-hardened material.
  • the guide rod 11 receives an optimal orientation or positive fixing on the bottom part 15 for this closed position. At later opening and closing strokes of the closing body 7, therefore, the closing body 7 is always guided by the guide rod 11 in the optimum closed position on the seat 8.
  • the positive engagement of the guide rod 11 on the bottom part 15 ensures that the guide rod 11 can not leave the optimal contact point on the bottom part 15 even under operating conditions with low fluid pressures in the control chamber 3 and within the closing body 7 even under the influence of larger disturbing forces.

Landscapes

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

Claims (6)

  1. Ensemble de soupape de commande (7, 8, 11) d'un injecteur de carburant, comprenant un corps de fermeture (7) en forme de douille, lequel est disposé de manière déplaçable axialement sur une tige de guidage (11) dont l'une des extrémités frontales est supportée sur une partie fixe (15) et dont l'autre extrémité frontale peut être soumise, par phases, à une haute pression lors du fonctionnement de l'injecteur de carburant, caractérisé
    en ce qu'au moins une saillie frontale, dont la section transversale présente une petite dimension par comparaison avec la section transversale de la tige de guidage (11), est disposée à une extrémité frontale de la tige de guidage (11), et
    en ce que la partie fixe (15) supportant la tige de guidage (11) peut être déformée plastiquement par la saillie en cas de haute pression agissant sur l'autre extrémité frontale de la tige de guidage (11).
  2. Ensemble de soupape de commande (7, 8, 11) d'un injecteur de carburant, comprenant un corps de fermeture (7) en forme de douille, lequel est disposé de manière déplaçable axialement sur une tige de guidage (11) dont l'une des extrémités frontales est supportée sur une partie fixe (15) et dont l'autre extrémité frontale peut être soumise, par phases, à une haute pression fluidique lors du fonctionnement de l'injecteur de carburant, caractérisé en ce que, du côté de la partie fixe (15) opposé à l'une des extrémités frontales de la tige de guidage (11), est disposée au moins une saillie orientée en direction du côté frontal de la tige de guidage (11) se trouvant en regard et dotée d'une section transversale petite par comparaison avec la section transversale de la tige de guidage, et
    en ce que ledit côté frontal peut être déformé plastiquement par la saillie en cas de haute pression fluidique agissant sur l'autre extrémité frontale de la tige de guidage avec enfoncement de la saillie dans le côté frontal.
  3. Ensemble de soupape de commande selon la revendication 1 ou 2, caractérisé en ce qu'une saillie bombée est prévue, laquelle ne présente, avant la déformation plastique de la partie coopérant avec celle-ci, tout d'abord qu'un contact approximativement ponctuel avec la partie coopérante.
  4. Ensemble de soupape de commande selon les revendications 1 et 3, caractérisé en ce qu'une extrémité frontale de la tige de guidage (11) présente un côté frontal bombé.
  5. Ensemble de soupape de commande selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la saillie est constituée d'un matériau durci et la partie (15) coopérant avec celle-ci est constituée d'un matériau non durci.
  6. Procédé de production d'un injecteur de carburant comprenant un ensemble de soupape de commande selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'injecteur de carburant effectue après son montage une phase d'essai lors de laquelle l'injecteur de carburant est soumis à une haute pression, le point de contact optimal entre la tige de guidage (11) et la partie de fond (15) étant fixé par la déformation plastique.
EP11700513.2A 2010-02-02 2011-01-03 Ensemble soupape de commande d'un injecteur de carburant Active EP2531715B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010001486 DE102010001486A1 (de) 2010-02-02 2010-02-02 Steuerventilanordnung eines Kraftstoffinjektors
PCT/EP2011/050014 WO2011095367A1 (fr) 2010-02-02 2011-01-03 Ensemble soupape de commande d'un injecteur de carburant

Publications (2)

Publication Number Publication Date
EP2531715A1 EP2531715A1 (fr) 2012-12-12
EP2531715B1 true EP2531715B1 (fr) 2014-11-19

Family

ID=43660214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11700513.2A Active EP2531715B1 (fr) 2010-02-02 2011-01-03 Ensemble soupape de commande d'un injecteur de carburant

Country Status (5)

Country Link
EP (1) EP2531715B1 (fr)
CN (1) CN102741542B (fr)
DE (1) DE102010001486A1 (fr)
RU (1) RU2554696C2 (fr)
WO (1) WO2011095367A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012224203A1 (de) 2012-12-21 2014-06-26 Robert Bosch Gmbh Magnetbaugruppe für einen Kraftstoffinjektor, Verfahren zum Herstellen einer Magnetbaugruppe sowie Kraftstoffinjektor
DE102013221554A1 (de) * 2013-10-23 2015-04-23 Robert Bosch Gmbh Kraftstoffinjektor
DE102015202726A1 (de) 2015-02-16 2016-08-18 Robert Bosch Gmbh Steuerventilanordnung
DE102016209022A1 (de) 2016-05-24 2017-11-30 Robert Bosch Gmbh Steuerventil für ein Kraftstoffeinspritzventil
DE102016222871A1 (de) 2016-11-21 2018-05-24 Robert Bosch Gmbh Kraftstoffinjektor
DE102016223287A1 (de) 2016-11-24 2018-05-24 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor, Kraftstoffinjektor
DE102018201039A1 (de) 2018-01-24 2019-07-25 Robert Bosch Gmbh Kraftstoffinjektor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006021736A1 (de) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Kraftstoffinjektor mit druckausgeglichenem Steuerventil
DE102006050045A1 (de) 2006-10-24 2008-04-30 Robert Bosch Gmbh Injektor zur Einspritzung von Kraftstoff in Brennräume in Brennkraftmaschinen
DE102007025961A1 (de) * 2007-06-04 2008-12-11 Robert Bosch Gmbh Injektor
DE102008003348A1 (de) * 2008-01-07 2009-07-09 Robert Bosch Gmbh Kraftstoffinjektor

Also Published As

Publication number Publication date
RU2554696C2 (ru) 2015-06-27
CN102741542B (zh) 2015-03-25
DE102010001486A1 (de) 2011-08-04
EP2531715A1 (fr) 2012-12-12
WO2011095367A1 (fr) 2011-08-11
RU2012137146A (ru) 2014-03-10
CN102741542A (zh) 2012-10-17

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