EP1300583B1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP1300583B1
EP1300583B1 EP20020021426 EP02021426A EP1300583B1 EP 1300583 B1 EP1300583 B1 EP 1300583B1 EP 20020021426 EP20020021426 EP 20020021426 EP 02021426 A EP02021426 A EP 02021426A EP 1300583 B1 EP1300583 B1 EP 1300583B1
Authority
EP
European Patent Office
Prior art keywords
armature
fuel injection
injection valve
recesses
sleeve
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.)
Expired - Lifetime
Application number
EP20020021426
Other languages
German (de)
English (en)
Other versions
EP1300583A2 (fr
EP1300583A3 (fr
Inventor
Thomas Sebastian
Andreas Eichendorf
Guido Pilgram
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 EP1300583A2 publication Critical patent/EP1300583A2/fr
Publication of EP1300583A3 publication Critical patent/EP1300583A3/fr
Application granted granted Critical
Publication of EP1300583B1 publication Critical patent/EP1300583B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M51/0625—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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M51/0671—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 having an elongated 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
    • 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
    • F02M51/0671—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 having an elongated valve body attached thereto
    • F02M51/0675—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 having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • 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

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the independent claim 1.
  • a fuel injection valve for fuel injection systems of internal combustion engines which has a magnetic coil, an armature which can be acted upon by the magnetic coil in a stroke direction against a return spring and a valve needle which is in communication with a valve closing body.
  • the armature is movable between a first stop connected to the valve needle and limiting the movement of the armature in the stroke direction, and a second stop connected to the valve needle and limiting the movement of the armature against the stroke direction.
  • a damping spring in the form of a plate spring is arranged.
  • a disadvantage of the from the DE 198 49 210 A1 Known fuel injector is, on the one hand, that the manufacturing and assembly costs are increased by at least one additional component. On the other hand, it can be offset, for example, by obliquely inserting the disc spring or by the manufacturing tolerances occurring during manufacture or to tilt the armature during operation of the fuel injector. The result is large variations in the Ankerkeweg or in the height of the Vorhubspalts. Wear phenomena that remain uncompensated will then cause malfunction in the operation of the fuel injector.
  • WO 99/53189 A is a fuel injection valve for fuel injection systems of internal combustion engines, in particular for the direct injection of fuel into the combustion chamber of an internal combustion engine described.
  • the fuel injection valve has a magnet coil, an armature which can be acted upon by the magnet coil in a stroke direction against a first return spring and a valve needle which is in communication with a valve closing body.
  • the valve needle has a first stop for the armature movable on it, wherein the armature is additionally acted upon by a second return spring. Furthermore, a stationary second stop for the armature is provided.
  • the second return spring acts on the armature against the stroke direction and holds in a rest position with non-energized magnetic coil, the armature on the second stop in such a way that the armature is spaced from the formed on the valve needle first stop by a predetermined distance.
  • an electromagnetic fuel injection valve for injecting fuel into a suction pipe of internal combustion engines, which consists of a magnetic circuit with armature and a stop on which the armature or a fixedly connected to the armature part reaches the stop when the valve is energized.
  • a stop surface reaching stop more Quetschspalte are arranged whose depth does not exceed a certain value.
  • the fuel injection valve according to the invention with the features of independent claim 1 has the advantage that can be taken by a targeted reduction of front sides of a sleeve and a stop ring in the region of the armature influence on the wear phenomena occurring at these ends, in particular wear on other components of the Fuel injection valve can be compensated, so that the stroke of the valve needle remains constant.
  • a particular advantage is that the components can be provided in a simple manner with radial or annular recesses, whereby the surface of the end faces is arbitrarily changeable.
  • the number, size and arrangement of the radial recesses is arbitrary.
  • the production of the recesses is possible for example by milling in a simple and cost-effective manner.
  • the fuel injection valve 1 is embodied in the form of a fuel injection valve for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4 which cooperates with a valve seat body 6 arranged on a valve seat body 5 to form a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1 which has an injection opening 7.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole 9 of a magnetic coil 10.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated by a gap 26 and are based on a connecting member 29 from.
  • the magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13.
  • valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped.
  • armature 20 On the other side of the stop ring 15 there is an armature 20. This is a non-positively connected via a sleeve 21 with the valve needle 3 in connection.
  • a return spring 23 On the sleeve 21, a return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 24 to bias.
  • a Vorhubfeder 22 is arranged, which has a lower spring constant than the return spring 23 and in conjunction with a Vorhubspalt 34 allows pre-acceleration of the armature 20 via an anchor free path before tightening the valve needle 3.
  • both the sleeve 21 and the stop ring 15 has a surface structure, which is embodied for example in the form of various recesses 31, whereby an armature 20 facing drain-side end 32 of the sleeve 21 and an armature 20 facing inlet-side end face 33 of the stop ring 15 so are shapeable in their surface, that a caused by the operation of the fuel injection valve 1 wear on the end faces 32 and 33 is controllable so that wear on other components of the fuel injection valve 1 are compensated and therefore do not result in Hub Surgi the valve needle 3.
  • the recesses 31 may alternatively or additionally also be realized on the mating surface 38 or the mating surface 39 of the armature 20.
  • the armature 20 and the valve seat body 5 run fuel channels 30a to 30c.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injection valve 1 is sealed by a seal 28 against a fuel distributor line, not shown.
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon via the sleeve 21 on the valve needle 3 of the return spring 23 against the stroke direction so that the valve closing body 4 is held on the valve seat 6 in sealing engagement.
  • the armature 20 rests on the stop ring 15.
  • This Upon excitation of the magnetic coil 10, this builds up a magnetic field, which initially moves the armature 20 counter to the spring force of the prestroke spring 22 and then counter to the force of the return spring 23 in the stroke direction.
  • the stroke of the armature 20 is divided into a forward stroke, which serves to close a Vorhubspalts 34, and an opening stroke, which is determined by a in the rest position between the inner pole 13 and the armature 20 working gap 27.
  • the armature 20 After passing through the forward stroke, the armature 20 takes the sleeve 21, which is welded to the valve needle 3, and thus the valve needle 3 also in the stroke direction with.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 on the sleeve 21 from the inner pole 13, whereby the valve needle 3 moves against the stroke direction. As a result, the valve closing body 4 is seated on the valve seat surface 6, and the fuel injection valve 1 is closed. The armature 20 is seated on the stop ring 15.
  • Fig. 2 shows in an excerpted sectional view the in Fig. 1 With II designated section of the inventively designed fuel injector 1.
  • Matching components are provided in all figures with matching reference numerals.
  • the lower anchor stop is formed by the inserted into a recess 35 of the fuel injection valve 1 stop ring 15.
  • the stop ring 15 has recesses 31, which are introduced in the present embodiment in the radial direction in the stop ring 15 and thereby form a crenellated surface structure.
  • the surface of the armature 20 facing end face 33 of the stop ring 15 is thereby reduced compared to a full-surface stop ring 15. Wear phenomena on the front side 33, which are induced by the abutment of the armature 20 on the stop ring 15 during the closing of the fuel injection valve 1, act Hubverkleinernd.
  • the sleeve 21, which in Fig. 2 for reasons of clarity without the Vorhubfeder 22 is shown, at its the armature 20 facing end face 32 radially extending recesses 31, which also form a crenellated surface structure. This also reduces the area of the end face 32, which can come into contact with the armature 20.
  • the Hubver Sungen be compensated in particular by the fact that signs of wear, which occur in the sealing seat and the upper anchor stop on the inner pole 13 and increase the stroke of the valve needle 3 inadmissible, by the controllable signs of wear on the lower anchor stop on stop ring 15 and on the sleeve 21 after passing through the pre-stroke be balanced because they reduce the stroke of the valve needle 3.
  • the surface design of the end faces 32 and 33 is targeted to compensate for these signs of wear, the totality of the wear no longer affects stroke-changing.
  • Fig. 3A shows a schematic representation of the in Fig. 2 21 designated sleeve of the inventively designed fuel injector.
  • the sleeve 21 has recesses 31 at its the armature 20 facing the downstream side 32.
  • four recesses 31 are provided.
  • the holding function of the sleeve 21 for the Vorhubfeder 22 is not affected by the recesses 31, since it is clamped between the armature 20 and a collar 36.
  • Fig. 3B shows a schematic plan view of the in Fig. 3A shown sleeve 21.
  • the recesses 31 are at equal angular intervals of about 90 ° in the end face 32nd introduced the sleeve 21, whereby a crenellated surface structure is formed.
  • the surface of the end face 32 is reduced by the amount of lowered in the recesses 31 area. It can be provided with a larger or smaller angular extent at greater or lesser distances from each other for targeted control of wear and more or fewer recesses 31.
  • Fig. 4A shows a schematic representation of a first embodiment of the in Fig. 2 designated 15 stop rings of the inventively designed fuel injector. 1
  • the in Fig. 4A shown first embodiment of a stop ring 15 according to the invention a plurality of recesses 31, which reduce the surface of the stop ring 15.
  • twelve recesses 31 are provided, which, as shown in the schematic plan view Fig. 4B on the in Fig. 4A shown stop ring 15 apparent, are also arranged at constant angular intervals of about 30 °.
  • Figs. 5A and 5B show a schematic representation and a schematic plan view of a second example of the in Fig. 2 15 designated stop ring of the fuel injection valve. 1
  • the stop ring 15 is not a plurality of radial recesses 31, but a annular recess 37 which is formed on a radially outer portion of the stopper ring 15.
  • the mode of operation of the annular recess 37 is equal to that of the radial recesses 31, since the surface of the armature 20 facing end face 33 is also reduced.
  • the annular recess 37 may be made wider or narrower in the radial direction.
  • the example is characterized in particular by its ease of manufacture, for example by turning or milling.
  • the annular recess 37 is also transferable to the sleeve 21, where it is also attachable in a radially outer region.
  • the invention is not limited to the illustrated embodiments and also for other forms of anchors 20, for example, for submersible and flat armature, as well as any designs of fuel injectors 1 applicable.

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)
  • Fuel-Injection Apparatus (AREA)

Claims (7)

  1. Soupape d'injection de combustible (1), en particulier pour l'injection directe de combustible dans la chambre de combustion d'un moteur à combustion interne à allumage par étincelle et comprimant un mélange, comprenant un induit (20) qui coopère avec une bobine magnétique (10), et une aiguille de soupape (3) en liaison fonctionnelle avec l'induit (20) par le biais d'une douille (21), sur laquelle aiguille est prévu un corps de fermeture de soupape (4) qui forme un ajustement d'étanchéité avec une surface de siège de soupape (6), et un ressort de précourse (22) disposé entre la douille (21) et l'induit (20), ainsi qu'une bague de butée (15) servant de butée d'induit, qui est disposée du côté aval de l'induit (20),
    caractérisée en ce que
    sur un côté frontal (33), tourné vers l'induit (20), de la bague de butée (15) et/ou sur une première surface conjuguée (38) correspondante de l'induit (20) et/ou sur un côté frontal (32) de la douille (21) tourné vers l'induit (20) et/ou sur une deuxième surface conjuguée correspondante (39) de l'induit (20), on prévoit au moins un évidement (31) qui réduit considérablement une surface de butée active des côtés frontaux (32 ; 33), et
    en ce qu'une surface de la surface de butée active des côtés frontaux (32, 33) est plus grande qu'une surface de l'au moins un évidement (31).
  2. Soupape d'injection de combustible selon la revendication 1, caractérisée en ce que l'on prévoit plusieurs évidements (31).
  3. Soupape d'injection de combustible selon la revendication 2, caractérisée en ce que les évidements (31) sont pratiqués dans la direction radiale dans les côtés frontaux (32 ; 33).
  4. Soupape d'injection de combustible selon l'une quelconque des revendications 1 à 3,
    caractérisée en ce que les évidements radiaux (31) sont pratiqués à intervalles angulaires identiques dans les côtés frontaux (32 ; 33).
  5. Soupape d'injection de combustible selon l'une quelconque des revendications 1 à 4,
    caractérisée en ce que
    les évidements radiaux (31) couvrent des plages angulaires identiques.
  6. Soupape d'injection de combustible selon la revendication 1,
    caractérisée en ce que
    les évidements sont réalisés sous forme annulaire.
  7. Soupape d'injection de combustible selon la revendication 6,
    caractérisée en ce que
    les évidements annulaires sont réalisés dans une région radialement extérieure des surfaces frontales (32 ; 33).
EP20020021426 2001-10-02 2002-09-25 Soupape d'injection de combustible Expired - Lifetime EP1300583B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001148592 DE10148592A1 (de) 2001-10-02 2001-10-02 Brennstoffeinspritzventil
DE10148592 2001-10-02

Publications (3)

Publication Number Publication Date
EP1300583A2 EP1300583A2 (fr) 2003-04-09
EP1300583A3 EP1300583A3 (fr) 2003-04-23
EP1300583B1 true EP1300583B1 (fr) 2009-08-05

Family

ID=7701118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020021426 Expired - Lifetime EP1300583B1 (fr) 2001-10-02 2002-09-25 Soupape d'injection de combustible

Country Status (3)

Country Link
EP (1) EP1300583B1 (fr)
JP (1) JP4217453B2 (fr)
DE (2) DE10148592A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015215537A1 (de) 2015-08-14 2017-02-16 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3501973A1 (de) * 1984-01-23 1985-07-25 Nippondenso Co., Ltd., Kariya, Aichi Brennstoff-einspritzduese
JPS63109277A (ja) * 1986-10-28 1988-05-13 Aisan Ind Co Ltd 電磁式燃料噴射弁
DE3834447A1 (de) * 1988-10-10 1990-04-12 Mesenich Gerhard Elektromagnetisches einspritzventil und verfahren zu dessen herstellung
DE4421935A1 (de) * 1993-12-09 1995-06-14 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE19626576A1 (de) * 1996-07-02 1998-01-08 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19816315A1 (de) * 1998-04-11 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19849210A1 (de) * 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19960605A1 (de) * 1999-12-16 2001-07-19 Bosch Gmbh Robert Brennstoffeinspritzventil

Also Published As

Publication number Publication date
DE10148592A1 (de) 2003-04-10
JP4217453B2 (ja) 2009-02-04
EP1300583A2 (fr) 2003-04-09
DE50213737D1 (de) 2009-09-17
EP1300583A3 (fr) 2003-04-23
JP2003120462A (ja) 2003-04-23

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