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WO2010037590A1 - Injecteur de carburant et procédé de traitement de surface - Google Patents

Injecteur de carburant et procédé de traitement de surface Download PDF

Info

Publication number
WO2010037590A1
WO2010037590A1 PCT/EP2009/060445 EP2009060445W WO2010037590A1 WO 2010037590 A1 WO2010037590 A1 WO 2010037590A1 EP 2009060445 W EP2009060445 W EP 2009060445W WO 2010037590 A1 WO2010037590 A1 WO 2010037590A1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
fuel
grooves
control valve
inj ector
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.)
Ceased
Application number
PCT/EP2009/060445
Other languages
German (de)
English (en)
Inventor
Christian Grimminger
Andreas Fath
Holger Rapp
Helmut Clauss
Matthias Schnell
Oezguer Tuerker
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
Priority to EP09781758.9A priority Critical patent/EP2331807B1/fr
Priority to CN200980139261.9A priority patent/CN102171438B/zh
Publication of WO2010037590A1 publication Critical patent/WO2010037590A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0639—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature acting as a valve
    • 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
    • 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 fuel injector, in particular a common rail injector, for injecting fuel into a combustion chamber of an internal combustion engine according to the preamble of claim 1 and to a method for surface treatment of an armature of a fuel injector according to the preamble of claim 8 ,
  • a designed as a common rail injector fuel injector is known.
  • This includes a servo valve (control valve) for switching the actual injection valve element, which is adjustable between a closed position and the fuel flow through a nozzle hole arrangement releasing into the combustion chamber opening position.
  • an electromagnetic actuator is provided, which cooperates with an armature plate, which in turn is operatively connected to a control valve element.
  • the control valve connects a limited by the injection valve element control chamber with a low pressure region of the fuel injector, with the result that the injection valve element results in an opening direction acting hydraulic force.
  • the armature plate is provided with an armature surface facing the electromagnetic actuator, which is usually ground rotationally symmetrical. When rotationally symmetrical grinding occurs due to production to the formation of in the radial direction juxtaposed rotational grooves, which lead to a hydraulic bonding of the armature at the beginning of the closing process.
  • the invention has for its object to propose a fuel injector, in which hydraulic adhesive effects at the beginning of the closing operation in the region of the armature, at least largely avoided. Furthermore, the surface of the armature should be reproducible. Furthermore, the object is to propose an alternative surface treatment method for the treatment of the surface of an anchor, with the hydraulic adhesive effects are avoided at the beginning of the closing process.
  • the invention is based on the idea, the rotating groove structure, resulting from a, preferably rotationally symmetric, grinding of the electromagnetic actuator in the mounted state resulting anchor surface, thereby interrupting or possibly even completely destroy that at least one angularly extending to the rotation grooves connecting groove is provided, which connects at least a portion of, preferably in the radial direction side by side, circumferentially occidentalre- ckenden rotating grooves together to allow in this way a facilitated inflow of hydraulic fluid into a region axially between the armature surface and the actuator, with the Aim to avoid hydraulic sticking effects.
  • the at least one connecting groove preferably introduced by grinding into the armature, enables an accelerated inflow of fuel between the armature surface and a stop surface, preferably provided by the electromagnetic actuator, as a result of which hydraulic adhesive effects, at least largely, are prevented.
  • the at least one connecting groove particularly preferably has, at least approximately, the same dimensions as the rotational grooves formed by, in particular, rotationally symmetrical grinding.
  • a turning groove in the sense of the invention is understood as meaning a circumferentially extending groove which either completely revolves around a central point or which, in sections, in the case of the realization of several, preferably evenly distributed in the circumferential direction, the armature vanes may be interrupted by the gaps formed between the circumferentially juxtaposed armature vanes.
  • the at least one connecting groove is formed as a radial groove extending in the radial direction.
  • the at least one connecting groove, at least approximately, all turning grooves is formed interconnecting, that extends from a radially inner region to a radially outer region of the anchor surface.
  • the armature surface is provided with a cross-cut surface, that is, with a multiplicity of circumferentially extending, side by side in the radial direction arranged rotational grooves, which are crossed by a plurality of radially extending connecting grooves.
  • the cross-cut surface is realized by honing, which is a machining fine machining process.
  • the armature is not directly operatively connected to an injection valve member which releases a nozzle hole arrangement in its open position (wherein such an embodiment is feasible), but acts directly adjusting to a control valve member of a control valve (servo valve), the armature being either integral with the control valve member or is firmly connected to it.
  • a control valve serving as a control valve
  • significantly higher pressures can be switched than with a direct control of the injection valve element.
  • control valve element is designed as a sleeve part, that has a central through hole, which is preferably closed axially by a pressure pin.
  • pressure-balanced control valves can be realized in the axial direction in the closed state, with the pressure pin essentially only having the task of sealing in the axial direction a valve chamber formed hydraulically with a control chamber formed inside the control valve element and the hydraulic pressure forces behind support axially above.
  • the invention also leads to a method for the surface treatment of an armature of a fuel injector.
  • This is preferably the armature of a control valve (Servo valve).
  • the method carried out according to the concept of the invention is characterized in that a plurality of rotational grooves arising in the circumferential direction are hydraulically connected to one another by means of at least one connecting groove extending at an angle to the rotational grooves, thus ensuring a faster inflow of fuel into the region between the Anchor surface and a stop surface to allow, so that hydraulic adhesive effects are avoided at the beginning of the closing process.
  • connection groove not only a single connection groove is provided, but a plurality of connecting grooves, wherein this is preferably achieved in that the anchor surface is provided with a cross-section, ie with a plurality of circumferentially extending rotational grooves which are crossed at an angle to these extending connecting grooves, preferably at right angles.
  • Fig. 1 is an anchor surface of an armature for a fuel injector in a plan view
  • FIG. 2 is a schematic, partial sectional view of a trained as a common rail Inj ector force Substance injector with an anchor shown in Fig. 1.
  • Fig. 1 shows a plan view of an anchor 1 (here anchor plate) for a later still to be explained control valve of a fuel injector.
  • the armature 1 is connected in one piece with a substantially hollow cylindrical control valve element 2 extending into the plane of the drawing.
  • a substantially hollow cylindrical control valve element 2 extending into the plane of the drawing.
  • anchor surface 3 is shown in Fig. 1, the, in the assembled state. It can be seen that the armature surface 3 is formed by three evenly circumferentially spaced wing surfaces 4 and a central annular surface section 5, which surrounds a central bore 6 radially outward.
  • the wing surfaces 4 are upper sides of vanes 7, which are distributed uniformly in the circumferential direction, with two vanes 7 arranged circumferentially next to each other being separated from one another by a radially widening radial gap 8 in the radial direction.
  • the radial gaps 8 allow fuel passage in the axial direction and thus prevent unwanted vibrations of the armature 1 during operation.
  • the armature surface 3 is designed as a cross-cut surface 9. This includes a plurality of circumferentially extending and in radial Direction of juxtaposed rotational grooves 10, which are crossed at right angles, by a plurality of circumferentially spaced and radially extending connecting grooves 11.
  • the rotating groove structure is destroyed by the connecting grooves 11, so that one with elevations and valleys ( Grooves) provides a textured surface which facilitates penetration of fuel into an area between the armature surface 3 and corresponding abutment surfaces, thereby avoiding hydraulic sticking effects at the beginning of the closing process.
  • FIG. 2 shows a fuel injector 12 equipped with an armature 1 shown in FIG. 1.
  • the armature 1 is part of a control valve 13 (servo valve) of the fuel injector 12, with the aid of which a control chamber 14 hydraulically a low-pressure region 15 of the fuel injector 12 is connected, which in turn is connected via a return connection, not shown, with a reservoir.
  • the control chamber 14 is bounded in the axial direction in the plane of the drawing down by an injection valve element 16, which moves in the axial direction in the plane of the drawing with the control valve 13 open and thus releases a nozzle hole arrangement, not shown, by the standing substantially under rail pressure fuel in can flow the combustion chamber of an internal combustion engine.
  • the control chamber 14 is hydraulically connected via an outlet throttle channel 17 to a valve chamber 18 formed inside the sleeve-shaped control valve element 2. From this, in the illustrated opening position of the control valve 13 fuel can flow into the low-pressure region 15 and via the return port, not shown. From Fig. 2 It can also be seen that in the centric bore 6 of the control valve element 2, a pressure pin 25 which is supported upwardly in the axial direction in the plane of the drawing is received, which seals the valve chamber 18 in an upward direction in the axial direction. At the same time the pressure pin 25 serves as a guide of the control valve element 2 in its axial opening and closing movement.
  • an electromagnetic actuator 22 is provided, which cooperates with the armature 1, such that upon energization of a magnetic coil 23 due to the magnetic forces an opening movement of the armature 1 and thus the control valve element 2 results.
  • the armature 1 is more accurate
  • the armature surface 3 shown in Fig. 1 provided with a WienschliffOber Assembly which allows a quick fuel inlet from the radial direction in a region between the armature surface 3 and the contact surface 24 for the anchor 1 Anker.

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)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un injecteur de carburant (12), en particulier un injecteur à rampe commune, destiné à injecter du carburant dans une chambre de combustion d'un moteur à combustion interne, avec au moins un actionneur électromagnétique (22) destiné à déplacer un induit (1). L'induit (1) possède une surface d'induit (3) tournée vers l'actionneur (22), s'étendant dans la direction de la circonférence et dotée de rainures (10) disposées dans la direction radiale. Selon l'invention, il est prévu de former dans l'induit (1) au moins une nervure de liaison (11) reliant ensemble au moins certaines des nervures (10). L'invention concerne en outre un procédé de traitement de surface.
PCT/EP2009/060445 2008-10-02 2009-08-12 Injecteur de carburant et procédé de traitement de surface Ceased WO2010037590A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09781758.9A EP2331807B1 (fr) 2008-10-02 2009-08-12 Injecteur de carburant et procédé de traitement de surface
CN200980139261.9A CN102171438B (zh) 2008-10-02 2009-08-12 燃料喷射器及表面处理方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008042593.1 2008-10-02
DE200810042593 DE102008042593A1 (de) 2008-10-02 2008-10-02 Kraftstoff-Injektor sowie Oberflächenbehandlungsverfahren

Publications (1)

Publication Number Publication Date
WO2010037590A1 true WO2010037590A1 (fr) 2010-04-08

Family

ID=41351553

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/060445 Ceased WO2010037590A1 (fr) 2008-10-02 2009-08-12 Injecteur de carburant et procédé de traitement de surface

Country Status (4)

Country Link
EP (1) EP2331807B1 (fr)
CN (1) CN102171438B (fr)
DE (1) DE102008042593A1 (fr)
WO (1) WO2010037590A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012205365A1 (de) 2012-04-02 2013-10-02 Robert Bosch Gmbh Anordnung umfassend eine Magnetbaugruppe und einen hubbeweglichen Anker

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404336A1 (fr) * 1989-06-21 1990-12-27 General Motors Corporation Soupape actionnée électromagnétiquement
DE19523915A1 (de) * 1995-06-30 1997-01-02 Bosch Gmbh Robert Mikroventil und Verfahren zur Herstellung eines Mikroventils
WO2001044652A1 (fr) * 1999-12-16 2001-06-21 Robert Bosch Gmbh Soupape d'injection de carburant
WO2002084103A1 (fr) * 2001-04-11 2002-10-24 Robert Bosch Gmbh Soupape d'injection de carburant

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256662A1 (de) * 2002-12-04 2004-06-17 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006020724A1 (de) 2006-05-04 2007-11-08 Robert Bosch Gmbh Magnetventil mit selbstzentrierendem Ankerbolzen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404336A1 (fr) * 1989-06-21 1990-12-27 General Motors Corporation Soupape actionnée électromagnétiquement
DE19523915A1 (de) * 1995-06-30 1997-01-02 Bosch Gmbh Robert Mikroventil und Verfahren zur Herstellung eines Mikroventils
WO2001044652A1 (fr) * 1999-12-16 2001-06-21 Robert Bosch Gmbh Soupape d'injection de carburant
WO2002084103A1 (fr) * 2001-04-11 2002-10-24 Robert Bosch Gmbh Soupape d'injection de carburant

Also Published As

Publication number Publication date
EP2331807B1 (fr) 2013-06-19
CN102171438A (zh) 2011-08-31
CN102171438B (zh) 2014-05-07
DE102008042593A1 (de) 2010-04-08
EP2331807A1 (fr) 2011-06-15

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