EP2212543B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP2212543B1
EP2212543B1 EP08804639A EP08804639A EP2212543B1 EP 2212543 B1 EP2212543 B1 EP 2212543B1 EP 08804639 A EP08804639 A EP 08804639A EP 08804639 A EP08804639 A EP 08804639A EP 2212543 B1 EP2212543 B1 EP 2212543B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
magnetic circuit
injection valve
sleeve body
circuit component
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
EP08804639A
Other languages
German (de)
English (en)
Other versions
EP2212543A1 (fr
Inventor
Ferdinand Reiter
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 EP2212543A1 publication Critical patent/EP2212543A1/fr
Application granted granted Critical
Publication of EP2212543B1 publication Critical patent/EP2212543B1/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
    • 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
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • 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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0667—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature acting as a valve or having a short valve body attached thereto
    • 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
    • F02M61/166—Selection of particular materials

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a fuel injection valve for fuel injection systems of internal combustion engines which comprises an excitable actuator in the form of an electromagnetic circuit having a magnetic coil, an outer magnetic circuit component and a movable armature for actuating a valve closing body, which cooperates with a provided on a valve seat body valve seat.
  • the fuel injection valve serving as a fuel inlet nozzle and inner pole tubular core, which is surrounded by the magnetic coil.
  • the outer magnetic circuit component is designed pot-shaped, wherein the magnetic circuit component is installed in the valve so that it is slipped over the magnetic coil.
  • the electromagnetic circuit is closed by a closure part, which is inserted from below into the magnetic circuit component.
  • the movable armature is guided in the bobbin or in an inner opening of the closure part.
  • the entire actuator is enclosed by a plastic extrusion, which also forms an inflow-side connecting piece.
  • a fuel injection valve is also already known, is dispensed with serving as a fuel inlet nozzle and inner pole tubular core, which is surrounded by the magnetic coil.
  • the fuel injection valve is characterized in that both the inflow-side connecting piece and the connecting part serving as a valve seat carrier as deep-drawn sheet metal parts are executed.
  • the sheet metal parts are formed by a deformation stress exceeding the yield value of their material and connected together by means of connecting pins to form a valve housing.
  • a fuel injection valve is already known wherein a Sputenraum of a magnetic circuit component, a cover part and is limited inwardly by a Hülsemköper, wherein Hülsem Archives and cover part are welded together.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that in a simple and cost-effective manner, a particularly compact structure in the region of the magnetic circuit and in the areas upstream and downstream of the magnetic circuit can be realized, so that a very small, handy injection valve arises.
  • a simple structural solution is provided, with a closed dense coil space is provided for Spulenabdichtung by serving as the inner pole of the magnetic circuit disk-shaped cover part is inserted into an outer magnetic circuit component, wherein both the cover part and the magnetic circuit component with a thin-walled sleeve body are firmly connected , The sleeve body limits the coil space for the solenoid inside.
  • the fuel injection valve is particularly favorable in the production of the items and the assembly.
  • the very short magnetic circuit works very effectively with low losses and thus has the best functional properties.
  • the construction according to the invention makes it possible to produce a fuel injection valve with a total length of ⁇ 30 mm.
  • the sleeve body is L-shaped in cross section. Length variants of the fuel injection valve according to the invention are very easy to produce in large numbers by differently long and specifically shaped connecting pieces, valve seat carrier, valve needles and spacers.
  • FIG. 1 a fuel injection valve in two variants, of which the left variant is in the range of the electromagnetic circuit.
  • FIG. 1 shown electromagnetically operable valve in the form of an injection valve for fuel injection systems of mixture-compression, spark-ignition internal combustion engines has an electromagnetic circuit with a solenoid 1, which does not, as is common in such injectors usual, serving as a fuel inlet port and inner pole tubular core. Rather, the magnetic coil 1 surrounds a thin-walled cylindrical sleeve body 2.
  • a bobbin 3 receives a winding of the magnetic coil 1, wherein the bobbin 3 rests directly against an outer wall of the sleeve body 2.
  • the bobbin 3 made of plastic passes directly into a mitgespritzten electrical connection plug 5, not shown in detail, via which the electrical contacting of the magnetic coil 1 takes place.
  • the sleeve body 2 is arranged concentrically to a valve longitudinal axis 10, wherein the sleeve body 2 is either a metal non-magnetic intermediate part, which is made for example of stainless steel, or forms a magnetic throttle body in the magnetic circuit as a ferritic component.
  • the bobbin 3 Surrounded is the bobbin 3 with the magnetic coil 1 of an outer cup-shaped Magnetic circuit component 11, which is part of the valve housing.
  • a cover part 14 is inserted into the magnetic circuit component 11, which serves as the inner pole of the magnetic circuit.
  • the lid part 14 is in turn connected to the sleeve body 2 by means of a second weld 15 tightly and firmly. With the cover part 14, the sleeve body 2 and the outer magnetic circuit component 11, a sealed, dense coil space is created in this way, which is interrupted only in the area of the electrical contacting of the magnetic coil 1 by a recess 16 in the cover part 14.
  • the cover part 14 extends as a largely flat disc.
  • the cover member 14 is also disc-shaped, but formed with a cylindrical extension 8 which projects into the sleeve body 2, whereby it is possible to attach to an axially parallel peripheral surface 18 of the extension 8 of the cover member 14, the weld 15, 15b.
  • a thin-walled tubular connecting part which is designed here as a valve seat carrier 19, which is firmly connected to the magnetic circuit component 11 via a third weld seam 20.
  • the component bottom 12 of the magnetic circuit component 11 has an annular extension 22 which protrudes from the magnetic circuit component 11 such that the weld seam 20 can be attached in this region without impairing the magnetic coil 1 or other components for connection to the valve seat carrier 19.
  • an axially movable valve needle 21 is arranged in the valve seat carrier 19.
  • a spherical valve closing body 24 made of metal or ceramic is provided.
  • the actuation of the injection valve is electromagnetically.
  • the electromagnetic circuit with the solenoid coil 1, the outer magnetic circuit member 11, the cover member 14 and an armature serves 27.
  • the cup-shaped armature 27 is, for example formed integrally with a valve needle shaft 21a (right in FIG. 1 ) or at a stage 28 of the valve needle shaft 21 a and there firmly connected to this (left in FIG. 1 ).
  • the guide of the armature 27 during its axial movement takes place along the inner wall of the sleeve body 2.
  • the solenoid 1 end facing away from the valve seat support 19 is a cylindrical valve seat body 29 having a fixed valve seat 30, mounted by welding tight.
  • the valve seat body 29 is made of metal or ceramic and sealed by a sealing ring 31.
  • the spherical valve closing body 24 of the valve needle 21 cooperates with the valve seat 30 of the valve seat body 29, which tapers frustoconically in the flow direction.
  • the valve seat body 29 On its lower end face, the valve seat body 29 is provided with a spray hole disk 34 of flat design, for example, and of e.g. cup-shaped holding disc 35 fixed and tight by a z. B. connected by means of a laser weld.
  • the spray perforated disk 34 at least one, for example, four ejection openings 39 formed by erosion or punching are provided.
  • a plurality of flow-through grooves 40 are provided circumferentially in the valve seat body 29 in the region of a guide section.
  • the arrangement of the cover part 14 in the outer magnetic circuit component 11 and on the sleeve body 2 is crucial for the stroke of the valve needle 21.
  • the one end position of the valve needle 21 is fixed at non-energized magnetic coil 1 by the contact of the valve closing body 24 to the valve seat 30 of the valve seat body 29 while the other end position of the valve needle 21 results in energized solenoid coil 1 by the system of the armature 27 at the lower end of the cover part 14, which is provided there eg with a wear protection layer.
  • the assembly of the fuel injection valve takes place in the region of the magnetic circuit in the following order.
  • the sleeve body 2 and the lid part 14 are firmly connected to each other via the weld 15, 15a, 15b.
  • the bobbin 3 is introduced with the magnetic coil 1 in the outer magnetic circuit component 11.
  • these two modules are joined together until the cover member 14 is properly positioned in the magnetic circuit member 11.
  • the sleeve body 2 is fixedly connected to the magnetic circuit component 11 on its component bottom 12 by means of the weld seam 13.
  • the valve seat carrier 19 is then fastened to the magnetic circuit component 11 with the weld seam 20.
  • the cover part 14 is firmly connected to a thin-walled connecting piece 41 by means of a fourth weld seam 38.
  • the connecting piece 41 extends in a tubular manner and can be shaped in a targeted manner via steps at different points with respect to the inner diameter, such as FIG. 1 can be seen. Variable lengths for the connecting pieces 41 can be used.
  • the connecting piece 41 engages either in a groove 36 on the cover part 14 (left in FIG. 1 ) or sits on a shoulder 37 flush with the inner bore of the cover part 14 on this (right in FIG. 1 ).
  • a setting 43 is fitted in a concentric with the valve longitudinal axis 10 extending flow bore 42 of the connecting piece 41, which serves to supply the fuel in the direction of the valve seat 30, except for the return spring 26, a setting 43 is fitted.
  • the adjusting member 43 is used to adjust the spring bias of the voltage applied to the adjusting element 43 return spring 26, which in turn is supported with its opposite side of the armature 27, wherein an adjustment of the dynamic Abspritzmenge with the adjustment 43.
  • a fuel filter 44 is integrated directly in the adjusting element 43.
  • the fuel injection valve according to the invention is characterized by a particularly compact design in the region of the magnetic circuit as well as in the areas upstream and downstream of the magnetic circuit, so that a very small, handy injection valve is formed.
  • the sleeve body 2 has, for example, a length of only about 3.5 mm.
  • Both the connecting piece 41 and the valve seat carrier 19 are designed as thin-walled deep-drawn components which inflow the fuel injection valve and downstream with bent annular collar 45, 46 limit.
  • These annular collars 45, 46 each form a boundary of an annular groove 47, 48, in each of which a sealing ring 49, 50 in the form of an O-ring for sealing the fuel injection valve to the outside (fuel rail, intake manifold) is introduced.
  • the respective other boundary of the annular grooves 47, 48 define spacers 52, 53, which are pushed circumferentially on the connecting piece 41 and the valve seat carrier 19.
  • the spacers 52, 53 are formed for example of plastic and have a structure that is highly stable by chamber-like, outwardly reaching cavities and very low mass.
  • FIG. 1 Two variants of the fuel injection valve according to the invention are shown. Length variants of the fuel injection valve are very easy to produce in large numbers by differently long and specifically shaped connecting piece 41, valve seat carrier 19, valve needles 21 and spacers 52, 53. A color coding of the fuel injectors is very easy on appropriately colored spacers 52, 53 possible. A plastic extrusion of the fuel injection valve can be omitted.

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

Claims (8)

  1. Soupape d'injection de carburant pour installations d'injection de carburant de moteurs à combustion interne, comprenant un axe longitudinal de soupape (10), un actionneur excitable en forme de circuit électromagnétique avec une bobine magnétique (1), un composant de circuit magnétique extérieur (11) et un induit mobile (27) pour actionner un corps de fermeture de soupape (24) qui coopère avec un siège de soupape (30) prévu sur un corps de siège de soupape (29), un espace de bobine pour la bobine magnétique (1) étant limité par le composant de circuit magnétique extérieur (11), une partie de couvercle (14), et vers l'intérieur par un corps de douille à parois minces (2), et la partie de couvercle (14) étant connectée fixement au corps de douille (2), en particulier au moyen d'un cordon de soudure (15),
    caractérisée en ce que
    le corps de douille (2) possède, en section transversale, une forme en L, dans laquelle, partant d'un contour par ailleurs cylindrique dans la direction périphérique, un collet annulaire (9) est recourbé, de sorte que le cordon de soudure (15, 15a) soit placé contre une surface frontale (17) horizontale de la partie de couvercle (14).
  2. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le corps de douille (2) constitue une partie intermédiaire non magnétique en métal, ou forme, en tant que composant ferritique, un point d'étranglement magnétique dans le circuit magnétique.
  3. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le composant de circuit magnétique extérieur (11) est réalisé sous forme de pot et possède un fond de composant (12) et le composant de circuit magnétique (11) est connecté dans cette région au corps de douille (2), notamment au moyen d'un cordon de soudure (13).
  4. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la paroi interne du corps de douille (2) est formée de manière si exacte que le guidage de l'induit (27) pendant son déplacement axial s'effectue le long de cette paroi.
  5. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le composant de circuit magnétique extérieur (11) est connecté à une partie de raccordement tubulaire qui est réalisée notamment sous forme de support de siège de soupape (19), notamment au moyen d'un cordon de soudure (20).
  6. Soupape d'injection de carburant selon la revendication 5,
    caractérisée en ce que
    le fond de composant (12) du composant de circuit magnétique (11) possède une saillie annulaire (22) qui fait saillie depuis le composant de circuit magnétique (11) de telle sorte que le cordon de soudure (20) soit appliqué contre elle.
  7. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes,
    caractérisée en ce
    qu'un corps de bobine (3) enveloppant la bobine magnétique (1) s'applique directement contre une paroi extérieure du corps de douille (2).
  8. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la soupape d'injection de carburant a une longueur totale < 30 mm.
EP08804639A 2007-10-18 2008-09-24 Soupape d'injection de carburant Active EP2212543B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007049945A DE102007049945A1 (de) 2007-10-18 2007-10-18 Brennstoffeinspritzventil
PCT/EP2008/062727 WO2009053196A1 (fr) 2007-10-18 2008-09-24 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP2212543A1 EP2212543A1 (fr) 2010-08-04
EP2212543B1 true EP2212543B1 (fr) 2012-12-19

Family

ID=40011250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08804639A Active EP2212543B1 (fr) 2007-10-18 2008-09-24 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US20100263631A1 (fr)
EP (1) EP2212543B1 (fr)
JP (1) JP5101705B2 (fr)
CN (1) CN101828026A (fr)
BR (1) BRPI0818668A2 (fr)
DE (1) DE102007049945A1 (fr)
WO (1) WO2009053196A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2166220B1 (fr) * 2008-09-19 2012-02-29 Continental Automotive GmbH Soupape d'injection
DE102011080693A1 (de) * 2011-08-09 2013-02-14 Robert Bosch Gmbh Magnetanker
DE102017207845A1 (de) * 2017-05-10 2018-11-15 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
JP7322820B2 (ja) * 2020-06-10 2023-08-08 株式会社デンソー 弁装置

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8902129D0 (en) * 1989-02-01 1989-03-22 Lucas Ind Plc Engine starting aid
DE3905992A1 (de) * 1989-02-25 1989-09-21 Mesenich Gerhard Elektromagnetisches hochdruckeinspritzventil
DE4003227C1 (en) * 1990-02-03 1991-01-03 Robert Bosch Gmbh, 7000 Stuttgart, De EM fuel injection valve for IC engine - has two overlapping parts welded together as narrowed section of one part
US5150842A (en) * 1990-11-19 1992-09-29 Ford Motor Company Molded fuel injector and method for producing
US5201341A (en) * 1991-03-19 1993-04-13 Nippon Soken, Inc. Electromagnetic type fluid flow control valve
DE19547406B4 (de) * 1995-12-19 2007-10-31 Robert Bosch Gmbh Brennstoffeinspritzventil
EP0781915A1 (fr) * 1995-12-26 1997-07-02 General Motors Corporation Injecteur de carburant
DE19629589B4 (de) * 1996-07-23 2007-08-30 Robert Bosch Gmbh Brennstoffeinspritzventil
DE19712591A1 (de) * 1997-03-26 1998-10-01 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung sowie Verwendung eines Brennstoffeinspritzventils
DE19712922B4 (de) 1997-03-27 2005-08-11 Robert Bosch Gmbh Brennstoffeinspritzventil
US6328231B1 (en) * 1998-05-27 2001-12-11 Siemens Automotive Corporation Compressed natural gas injector having improved low noise valve needle
US6186421B1 (en) * 1999-12-06 2001-02-13 Delphi Technologies, Inc. Fuel Injector
US6851622B2 (en) * 2002-01-08 2005-02-08 Siemens Vdo Automotive Corporation Fuel injector having a ferromagnetic coil bobbin
JP3819906B2 (ja) * 2004-02-27 2006-09-13 株式会社ケーヒン 電磁式燃料噴射弁およびその製造方法
DE102005040361A1 (de) * 2005-08-26 2007-03-01 Robert Bosch Gmbh Metallische Pressverbindung und Brennstoffeinspritzventil mit einer metallischen Pressverbindung
DE102005040363B4 (de) * 2005-08-26 2017-09-14 Robert Bosch Gmbh Brennstoffeinspritzventil
EP2002112B1 (fr) * 2006-03-27 2012-05-16 Continental Automotive Systems US, Inc. Injecteur chauffe par induction utilisant une bobine supplementaire
DE102007050817A1 (de) * 2007-10-24 2009-04-30 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil
DE102007050819A1 (de) * 2007-10-24 2009-04-30 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil

Also Published As

Publication number Publication date
WO2009053196A1 (fr) 2009-04-30
CN101828026A (zh) 2010-09-08
BRPI0818668A2 (pt) 2015-09-22
DE102007049945A1 (de) 2009-04-23
JP5101705B2 (ja) 2012-12-19
EP2212543A1 (fr) 2010-08-04
US20100263631A1 (en) 2010-10-21
JP2011501025A (ja) 2011-01-06

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