WO2009138279A1 - Vanne magnétique à fentes d'induit - Google Patents

Vanne magnétique à fentes d'induit Download PDF

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Publication number
WO2009138279A1
WO2009138279A1 PCT/EP2009/053123 EP2009053123W WO2009138279A1 WO 2009138279 A1 WO2009138279 A1 WO 2009138279A1 EP 2009053123 W EP2009053123 W EP 2009053123W WO 2009138279 A1 WO2009138279 A1 WO 2009138279A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel injector
valve
designed
recesses
anchor plate
Prior art date
Application number
PCT/EP2009/053123
Other languages
German (de)
English (en)
Inventor
Nadja Eisenmenger
Hans-Christoph Magel
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 WO2009138279A1 publication Critical patent/WO2009138279A1/fr

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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—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
    • 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
    • F02M2200/07—Fuel-injection apparatus having means for avoiding sticking of valve or armature, e.g. preventing hydraulic or magnetic sticking of parts
    • 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
    • F02M2200/08—Fuel-injection apparatus having special means for influencing magnetic flux, e.g. for shielding or guiding magnetic flux
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F2007/1676—Means for avoiding or reducing eddy currents in the magnetic circuit, e.g. radial slots
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding

Definitions

  • An injector for injecting fuel into the combustion chamber of an internal combustion engine in which an injection valve member is actuated via a solenoid-operated control valve, is known from EP-A 1 612 403.
  • a drain throttle from a control chamber can be closed or released in the fuel return.
  • the control chamber is bounded on one side by a control piston, with which an injection valve member is actuated, which releases or closes at least one injection opening into the combustion chamber of the internal combustion engine.
  • the outlet throttle is received in a body, which is provided on the side facing away from the control chamber with a tapered valve seat. In this valve seat, a closing element is adjustable, which is connected to the armature of the solenoid valve.
  • an edge is formed on the closing element, which is provided against a conically shaped seat.
  • the closing element moves on an axial rod, which is integrally connected to the body in which the drainage throttle is formed.
  • stroke-controlled injectors can be used, which are operated by means of a solenoid valve for controlling the pressure in a control chamber.
  • the preferably needle-shaped injection valve member is controlled, for example, via a servo control room.
  • the pressure in the control chamber is controlled via the solenoid valve, which has a spherical closing element.
  • the solenoid valve is usually not pressure balanced and therefore requires high spring forces, high magnetic switching forces and due to the dimensioning of spring and magnet considerably enlarged space.
  • solenoid valves which have a ball as a closing element, the fact that severe restrictions on the sequence of multiple injections exist so that usually very short consecutive injection intervals can not be realized.
  • Hub-controlled fuel injectors are known, which are actuated via a solenoid valve.
  • the injection valve member is controlled via a servo control chamber.
  • the pressure in the control chamber of the fuel injector in turn is controlled by a solenoid valve.
  • Injektorabêt a solenoid valve is necessary, which has the shortest possible switching times, therefore high switching speeds.
  • the use of a pressure compensated trained valve piston allows small spring forces, smaller magnetic forces to be generated by the electromagnet and smaller valve strokes and thus shorter switching times. The shorter valve switching times can improve the injection performance, in particular the multiple injection capability of the fuel injector.
  • the invention has for its object to provide a valve, in particular a solenoid valve, which realizes very short switching times.
  • a solenoid valve is proposed, the armature assembly of which has, in particular, an armature plate which is throttled in the edge region and has recesses or openings which allow acceleration of the movement of the armature plate of the armature assembly by the fuel.
  • the recesses which may advantageously be formed alternately as straight slots in different lengths along the circumference, or are designed as holes in the anchor plate, the damping forces, i. the flow forces occurring during the movement, which move on the anchor plate and slow it down, can be reduced. As a result, rapid switching movements of the armature plate of the armature assembly are possible.
  • the straight long slots which are preferably formed in an alternating sequence along the circumference of the anchor plate
  • a combination of short slots and additional openings, for example bores in the partial surfaces of the anchor plate would also be advantageous.
  • an anchor geometry with straight slots which is used in a fast-switching, in particular pressure-balanced valve, as by this measure the valve speed, i. the switching speed of the armature between the valve seat and upper stop is further increased.
  • the anchor geometry proposed according to the invention can also be used for non-pressure compensated switching valves for other purposes.
  • Figure 2 is a plan view of a first embodiment of an anchor plate
  • Figure 3 is a plan view of a second embodiment of the anchor plate of the solenoid valve.
  • FIG. 1 shows a longitudinal section through a fuel injector embodied according to the invention.
  • a Kraftstoff ⁇ njektor 10 is acted upon via a pressure accumulator 12, in which a system pressure prevails, with fuel.
  • the loading of the pressure accumulator 12 can be effected by a high-pressure delivery unit, such as, for example, a high-pressure pump of a high-pressure accumulator injection system, which is not shown in the illustration according to FIG.
  • a high-pressure line 14 extending from the pressure accumulator 12 to the fuel injector 10 opens into an injector body 16, in which a storage volume 18 is located.
  • the fuel injector 10 comprises, in addition to the injector body 16, a nozzle body 20 and an actuator housing 22.
  • the actuator housing 22 houses a rapidly switching switching valve 24, which in the embodiment of the fuel injector 10 according to FIG. 1 is designed as a solenoid valve.
  • the switching valve 24 designed as a solenoid valve comprises a magnetic core 26, in which a magnetic coil 28 is embedded. Furthermore, in the magnetic core 26 there is a through-hole in which, embedded in a sleeve 52, a closing spring 54 is inserted, which acts on a valve member 44 of the switching valve 24 in the closing direction.
  • the storage volume 18 embodied in the injector body 16 serves to damp hydraulic oscillations between the pressure accumulator 12 and the fuel injector 10. Furthermore, the fuel injector 10 comprises a valve piece 30 which delimits a control space 34.
  • the control chamber 34 is connected via an inlet throttle 36 with the storage volume 18 and is acted upon via the inlet throttle 36 with standing under system pressure, stored in the storage volume 18 fuel.
  • a pressure relief of the control chamber 34 via a drain passage 40, in which at least one outlet throttle 38 is formed.
  • the drainage channel 40 opens below a valve seat 42, which is closed in the illustration of Figure 1 by the valve member 44.
  • the valve seat 42 is designed in the flat surface of the valve piece 30 as a flat seat.
  • a closing spring 66 is supported at this is a circumferential collar on which a closing spring 66 is supported.
  • the closing spring 66 which puts the preferably needle-shaped injection valve member 32 in its seat 72, on the other hand, is supported on a lower annular surface of the valve member 30 from.
  • the preferably needle-shaped injection valve member 32 is also guided in the nozzle body 20.
  • the preferably needle-shaped injection valve member 32 In the region of the guidance of the injection valve member 32 in the nozzle body 20 are located on the lateral surface of the preferably needle-shaped injection valve member 32, one or more polished sections 68. About this flows under system pressure standing fuel from the storage volume 18 in an annular space 70 and is at the seat 72 at.
  • the preferred needle-shaped injection valve member 32 placed in its seat 72, so that Einspritzöffhungen 74, which are executed at the combustion chamber end of the fuel injector 10, remain closed.
  • the switching valve 24 actuates an armature assembly.
  • the armature assembly comprises an armature plate 46, on which the valve member 44 is executed.
  • the valve member 44 is guided in an armature guide 48.
  • the armature guide 48 rests on the upper planar surface of the valve piece 30.
  • the Ankervigung 48 and the valve member 30 are hired via a valve clamping nut 50 to a shoulder of the injector body 16 and fixed there.
  • the valve clamping nut 50 has a threaded portion, which is bolted in the illustration of Figure 1 with a corresponding thread on the inside of the actuator housing 22.
  • valve member 44 at the upper end of the armature plate 46 is formed, is guided on a pressure pin 62, so that the switching valve 24 is pressure balanced.
  • smaller spring forces acting on the valve seat 42 in the closing direction can be realized;
  • smaller magnetic forces for actuating a pressure-compensated switching valve 24 are possible. This in turn allows smaller valve strokes and faster switching times, which greatly favor the multiple injection capability of the fuel injector 10 proposed according to the invention.
  • the armature guide 48 allows precise guidance of the valve member 44, so that the exact impact of the valve member 44 is ensured in the valve seat 42.
  • the pressure pin 62 has substantially the same diameter as the valve seat 42 in order to minimize pressure forces on the valve member 44, so that it is pressure balanced.
  • the armature plate 46 moves together with the valve member 44 in ⁇ ff.ungscardi upwards. This results in a pressure relief of the control chamber 34, so that the preferably needle-shaped injection valve member 32 moves into this and extends out of its seat 72. From the storage volume 18 flows through the at least one polished section 68 on the lateral surface of the injection valve member 32 and the annular space 70 under system pressure fuel to the open Einspritzöffhungen 74. The fuel under system pressure is injected into the combustion chamber of the internal combustion engine.
  • the energization of the solenoid 28 is terminated. Due to the action of the closing spring 54, the valve member 44 is inserted into the valve seat 42. represents and the pressure relief of the control chamber 34 is prevented via the drain passage 40 with outlet throttle 38. Via the inlet throttle 36, system pressure builds up in the control chamber 34, which acts on the upper end face of the injection valve member 32 and places it in the seat 72, so that the combustion-chamber-side injection openings 74 are closed and the injection is terminated.
  • the anchor plate 46 of the armature assembly of the switching valve 24 is equipped so that it has the lowest possible flow resistance in their movement in the actuator chamber 58 and the highest possible magnetic force can be generated, which allows fast closing movements.
  • the armature plate 46 is provided with recesses or openings, which allow rapid switching movements of the switching valve 24 and minimize eddy currents occurring.
  • FIG. 2 shows a first embodiment of the armature plate of the switching valve according to the illustration in FIG. 1.
  • a planar surface 84 of the armature plate 46 has recesses 76, which in the embodiment according to FIG. 2 are designed as straight running slots.
  • the formed as a straight slots recesses 76 in the armature plate 84 extend as shown in Figure 2 in different lengths.
  • Reference numeral 78 denotes a first length of the recesses 76 designed as straight slots, while a second length thereof is designated by reference numeral 80.
  • the first length 78 exceeds the second length 80 by about twice.
  • a 90 ° graduation 82 is formed between the recesses 76 of first length 78 in the form of a slot, designed as straight slots. This applies analogously to the division of the recesses 76, designed as straight slots, of second length 80, which are likewise formed in the plane surface 84 of the armature plate 46 in a 90 ° pitch.
  • the illustration according to FIG. 3 shows a further embodiment of the design of the anchor plate.
  • the illustration according to FIG. 3 shows a plane surface 84, which has a combination of recesses 76 of first length 80 designed as straight slots with openings 86 provided therebetween as bores. Also in the embodiment according to Figure 3 can be a very high Entdrosselung the large
  • the embodiment shown in the representation according to FIG. 2 is preferable to a plane surface 84 of the anchor plate 46 which has only slots-but of different lengths 78, 80.
  • the degree of Entschrosselung which is achieved by the present invention proposed solution, whether by recesses formed as straight slots 76 of different lengths 78, 80, or through openings 86 in the flat surface 84, determines the switching speed of the switching valve 24, since the anchor plate 46 in the actuator chamber 58 on the low pressure side of the Kraftstoff ⁇ njektors 10 is moved.
  • the recesses 76 in the flat surface 84 of the anchor plate 46 as rectangular, straight slots, can also be deviated from this geometry, with an optimum between the Entdrosselung in the outer region and minimizing the magnetic force profile in the remaining inner region of the flat surface 84 of the armature plate 46 opposite the inner pole of the magnetic core, is desirable.
  • the greatest possible reduction of the plane surface 84 of the anchor plate 46 in the outer region allows lower flow resistance during the movement of the anchor plate 46 in the low-pressure side actuator chamber 58.

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)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un injecteur de carburant (10) pour l'injection de carburant dans la chambre de combustion d'un moteur à combustion interne, comprenant un obturateur de soupape d'injection (32) qui est actionné par décompression d'une chambre de commande (40). La chambre de commande (40) reçoit du carburant à la pression du circuit. La décompression de la chambre de commande (40) est effectuée par l'intermédiaire d'une vanne de commutation (24), dont l'obturateur (44) ouvre ou ferme un siège de vanne (24). La vanne de commutation (24) est dotée d'un ensemble induit qui comprend une plaque d'induit (46) dans laquelle sont pratiqués un certain nombre d'évidements (76) en forme de fentes rectilignes.
PCT/EP2009/053123 2008-05-16 2009-03-17 Vanne magnétique à fentes d'induit WO2009138279A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008001822.8 2008-05-16
DE200810001822 DE102008001822A1 (de) 2008-05-16 2008-05-16 Magnetventil mit Ankerschlitzung

Publications (1)

Publication Number Publication Date
WO2009138279A1 true WO2009138279A1 (fr) 2009-11-19

Family

ID=40717050

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/053123 WO2009138279A1 (fr) 2008-05-16 2009-03-17 Vanne magnétique à fentes d'induit

Country Status (2)

Country Link
DE (1) DE102008001822A1 (fr)
WO (1) WO2009138279A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013212137A1 (de) * 2013-06-25 2015-01-08 Robert Bosch Gmbh Magnetventil und Kraftstoffinjektor mit einem Magnetventil
DE102015217362A1 (de) 2015-09-11 2017-03-16 Continental Automotive Gmbh Kraftstoffinjektor, Verfahren zum Ermitteln der Position eines beweglichen Ankers und Motorsteuerung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933331A1 (de) * 1989-10-06 1991-04-11 Bosch Gmbh Robert Kraftstoffeinspritzventil fuer kraftstoffeinspritzanlagen von brennkraftmaschinen
DE102004032229B3 (de) * 2004-07-02 2006-01-05 Compact Dynamics Gmbh Brennstoff-Einspritzventil
EP1760308A2 (fr) * 2005-08-31 2007-03-07 Denso Corporation Électrovanne
DE102005053115A1 (de) * 2005-11-08 2007-05-10 Robert Bosch Gmbh Optimierte Ankergruppenführung für Magnetventile
DE102006050032A1 (de) * 2006-10-24 2008-04-30 Robert Bosch Gmbh Injektor mit einem eine konische Hubanschlagfläche aufweisenden Steuerventil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2277229T3 (es) 2004-06-30 2007-07-01 C.R.F. Societa Consortile Per Azioni Servovalvula para controlar el inyector de combustible de un motor de combustion interna.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933331A1 (de) * 1989-10-06 1991-04-11 Bosch Gmbh Robert Kraftstoffeinspritzventil fuer kraftstoffeinspritzanlagen von brennkraftmaschinen
DE102004032229B3 (de) * 2004-07-02 2006-01-05 Compact Dynamics Gmbh Brennstoff-Einspritzventil
EP1760308A2 (fr) * 2005-08-31 2007-03-07 Denso Corporation Électrovanne
DE102005053115A1 (de) * 2005-11-08 2007-05-10 Robert Bosch Gmbh Optimierte Ankergruppenführung für Magnetventile
DE102006050032A1 (de) * 2006-10-24 2008-04-30 Robert Bosch Gmbh Injektor mit einem eine konische Hubanschlagfläche aufweisenden Steuerventil

Also Published As

Publication number Publication date
DE102008001822A1 (de) 2009-11-19

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