EP2628941B1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP2628941B1
EP2628941B1 EP13152627.9A EP13152627A EP2628941B1 EP 2628941 B1 EP2628941 B1 EP 2628941B1 EP 13152627 A EP13152627 A EP 13152627A EP 2628941 B1 EP2628941 B1 EP 2628941B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
fuel injection
injection valve
recess
valve needle
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.)
Not-in-force
Application number
EP13152627.9A
Other languages
German (de)
English (en)
Other versions
EP2628941A1 (fr
Inventor
Michael Kleindl
Cornelia Giessler
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 EP2628941A1 publication Critical patent/EP2628941A1/fr
Application granted granted Critical
Publication of EP2628941B1 publication Critical patent/EP2628941B1/fr
Not-in-force 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
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear

Definitions

  • the present invention relates to a fuel injector, in particular for direct injection of fuel into a combustion chamber.
  • valves for direct injection of fuel or fuel are usually moved by means of an actuator against a closing spring so that a desired amount of fuel is introduced directly targeted into the combustion chamber.
  • a valve needle is usually moved by means of an actuator against a closing spring so that a desired amount of fuel is introduced directly targeted into the combustion chamber.
  • the fuel injection valve comprises, inter alia, a housing with at least one combustion chamber-side injection opening, a linearly movable valve needle for opening and closing the injection opening, a magnetic coil, a magnet armature linearly movable by the magnetic armature, wherein the armature is formed from an armature shell and an anchor stop sleeve.
  • the inner armature stop sleeve has a first abutment surface facing away from the combustion chamber, while a second stop surface facing the combustion chamber is formed on a flange of the valve needle.
  • the first stop surface and the second stop surface abut each other during the linear movement of the valve needle and / or the magnet armature.
  • the magnet armature has a continuous recess in which the armature stop sleeve is arranged on the wall of the recess. By surface grinding in this area of the anchor stop sleeve flow passages are created for the fuel. Seen over the axial length of the armature jacket of the magnet armature is completely penetrated in its recess by the anchor stop sleeve, so that the stop surface of the anchor stop sleeve flush with the upper end face of the anchor jacket which abuts against the inner pole extends.
  • the fuel injection valve according to the invention with the features of claim 1 makes it possible to reduce the wear on the armature and / or the valve needle. This prolongs the life of the fuel injection valve.
  • the sleeves used have only a very small volume and thus a low mass.
  • the mass reduction reduces the impact of closing the fuel injector, which also reduces the tendency to bounce. Due to the large number of closing and opening operations it comes Over the life to a build-up of wear between the valve needle and valve seat. This wear is reduced by the low masses. All these advantages are achieved by a fuel injection valve, in particular for the direct injection of fuel in a combustion chamber, comprising a housing with at least one combustion chamber-side spray opening. About this at least one injection port, the fuel from the fuel injection valve is introduced into the combustion chamber.
  • the fuel injection valve comprises a linearly movable valve needle, a magnetic coil and a magnetic armature linearly movable by the magnetic coil.
  • the linearly movable valve needle is used to open and close the at least one injection opening.
  • the valve needle comprises a main body extending along the longitudinal axis of the fuel injection valve.
  • a first sleeve is attached on the magnet armature.
  • This first sleeve is made separately from the armature and is firmly attached to the armature.
  • a first, the combustion chamber facing stop surface is formed.
  • a second, facing away from the combustion chamber tee surface is formed.
  • the first stop surface and the second stop surface are arranged so that they strike against each other during the linear movement of the valve needle and / or the armature.
  • the two stop surfaces are thus opposite.
  • the two stop surfaces are formed as annular surfaces. If the magnet armature is moved by means of the magnet coil in the opening direction, and thus to the side of the fuel injection valve facing away from the combustion chamber, then the first abutment surface strikes against the second abutment surface and the armature takes the valve needle in the opening direction.
  • the magnet armature has a continuous recess and the sleeve is arranged on the wall of the recess.
  • the valve needle preferably extends through this recess.
  • this recess is formed as a round through hole coaxial with the longitudinal axis of the fuel injection valve.
  • the recess has a uniform diameter over its entire length, measured parallel to the longitudinal axis.
  • a simply configured sleeve can be fastened to the wall of the recess.
  • a groove is formed in the wall of the recess.
  • This groove is in particular fully formed circumferentially.
  • the first sleeve is placed in this groove.
  • the first sleeve is in particular designed so that it protrudes beyond the wall of the recess. In particular, this projecting portion of the first sleeve forms the first stop surface.
  • the second stop surface may be formed in a first variant directly on the main body of the valve needle. Alternatively, it is preferably provided to attach a second sleeve to the main body of the valve needle. At this second sleeve, the second stop surface is formed. In particular, the second sleeve is located at a combustion chamber facing away from the end of the main body of the valve needle.
  • the first sleeve and / or the second sleeve are preferably made of a hard material or are coated to form a hardened surface. It is particularly preferably provided that the first sleeve is made of a stronger material than the armature, and / or the second sleeve of a stronger material than the remaining components, in particular the main body of the valve needle.
  • the first sleeve and / or the second sleeve are preferably fastened by means of positive locking and / or frictional engagement and / or material connection on the armature or on the main body of the valve needle.
  • the valve needle can be designed as a hollow needle or as a full needle.
  • FIG. 1 shows the fuel injection valve 1 in a parallel to the longitudinal axis 6 cut representation.
  • the fuel injection valve 1 comprises a housing 2, which comprises at least one injection opening 5 on a combustion chamber-facing side 3. About this injection port 5 fuel is injected into a combustion chamber.
  • the combustion chamber facing side 3 is opposite to a side facing away from the combustion chamber 4.
  • a valve needle 7 is guided linearly movable coaxially to the longitudinal axis 6.
  • This valve needle 7 has a base body 8.
  • This base 8 is hollow inside and has openings 9.
  • a spherical closure body 10 is pressed onto the injection opening 5.
  • the valve needle 7 is moved in the direction of the combustion chamber 4 facing away. Then, the closure body 10 lifts off from the spray opening 5 and fuel can be injected.
  • a magnetic coil 11 and an annular inner pole 12 are arranged in the housing 2.
  • a magnet armature 13 via the magnetic coil 11 of the inner pool 12 is magnetized and thus moves the armature 13 linear to the longitudinal axis 6.
  • a plug connection 14 of the fuel injection valve is shown.
  • FIGS. 2 to 5 Based on FIGS. 2 to 5 four embodiments of the fuel injection valve 1 are shown.
  • the FIGS. 2 to 5 show in each case the marked with II-V detail FIG. 1 , Identical or functionally identical components are provided with the same reference numerals in all embodiments.
  • FIG. 2 shows a detail of the fuel injection valve 1 according to the first embodiment. Shown is the armature 13 with an inner, continuous recess 20. On the wall of the recess 20, a first sleeve 15 is introduced. This first sleeve 15 is fixedly connected to the armature 13. Furthermore, the valve needle 7 is inserted in the recess 20. At the end of the main body 8 of the valve needle 7 facing away from the combustion chamber, a thickening 19 is formed.
  • the first sleeve 15 has on its combustion chamber side facing away from a first stop surface 16. At the thickening 19, a second, combustion chamber facing stop surface 18 is formed. During a movement of the magnet armature 13 and / or the valve needle 7, the two abutment surfaces 16, 18 abut one another.
  • the first sleeve 15 is made of a harder material than the magnet armature 13. As a result, wear on the first stop surface 16 is largely avoided.
  • FIG. 2 a length 21 of the recess 20, measured parallel to the longitudinal axis 6, and a diameter 22 of the recess 20.
  • the outer diameter of the first sleeve 15 corresponds to the diameter 22 of the recess 20.
  • the length of the first sleeve 15 is shorter than the length 21 of the recess 20.
  • An overall length of the first sleeve 15 and the thickening 19, measured parallel to the longitudinal axis 6, corresponds to the length 21 of the recess 20th
  • FIG. 3 shows a detail of the fuel injection valve 1 according to the second embodiment.
  • the armature 13 has a circumferential groove 23 on.
  • the first sleeve 15 is inserted.
  • the first sleeve 15 in this case has in particular a square cross-section.
  • the diameter of the recess 20 on the combustion chamber side of the groove 23 is smaller than the diameter of the recess 20 on the combustion chamber side facing away from the groove 23.
  • the first sleeve 15 projects beyond the wall of the recess 20 and at least a portion of the first sleeve 15 can as a first stop surface 16th be used.
  • FIG. 4 shows a detail of an unclaimed example.
  • the groove 23 is formed at a combustion chamber facing away from the end of the armature 13.
  • the groove 23 is open both toward the combustion chamber side 4 and towards the longitudinal axis 6.
  • This groove 23 allows a relatively simple assembly of the first sleeve 15 and at the same time allows the entire combustion chamber side facing away from the first sleeve 15 is available as the first stop surface 16.
  • FIG. 5 shows a detail of the fuel injection valve 1 according to another embodiment.
  • the first sleeve 15 and the armature 13 are the same as in the first embodiment.
  • a second sleeve 17 fixed to the main body 8 of the valve needle 7 is connected.
  • this second sleeve 17 is made of a hardened material or comprises a hardened surface, so that the wear on the second stop surface 18 is reduced.

Landscapes

  • 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 (9)

  1. Soupape d'injection de carburant (1), en particulier pour l'injection directe de carburant dans une chambre de combustion, comportant :
    - un boîtier (2) comprenant au moins une ouverture d'injection (5) située du côté de la chambre de combustion,
    - une aiguille de soupape (7) déplaçable linéairement pour ouvrir et fermer l'ouverture d'injection (5),
    - une bobine magnétique (11),
    - une armature magnétique (13) déplaçable linéairement au moyen de la bobine magnétique (11), et
    - une première douille (15) fixée sur l'armature magnétique (13),
    - une première surface de butée (16) opposée à la chambre de combustion étant réalisée sur la première douille (15), et une deuxième surface de butée (18) tournée vers la chambre de combustion étant réalisée sur l'aiguille de soupape (7), et
    - la première surface de butée (16) et la deuxième surface de butée (18) venant en butée l'une contre l'autre lors du déplacement linéaire de l'aiguille de soupape (7) et/ou de l'armature magnétique (13),
    - l'armature magnétique (13) comprenant un évidement traversant (20) et la première douille (15) étant disposée sur la paroi de l'évidement (20),
    caractérisée en ce que
    la première douille (15) est disposée dans l'évidement (20) de l'armature magnétique (13) de telle sorte que la première surface de butée (16) de la douille (15) et la deuxième surface de butée (18) de l'aiguille de soupape (7) se situent à l'intérieur de l'évidement (20).
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que l'évidement (20) présente un diamètre (22) uniforme sur toute sa longueur (21).
  3. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce qu'une rainure (23) est réalisée dans la paroi de l'évidement (20), la première douille (15) étant disposée dans la rainure (23).
  4. Soupape d'injection de carburant selon la revendication 3, caractérisée en ce que la première douille (15) fait saillie au-delà de la paroi de l'évidement (20).
  5. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée par une deuxième douille (17) fixée sur un corps de base (8) de l'aiguille de soupape (7), la deuxième surface de butée (18) étant réalisée sur la deuxième douille (17).
  6. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que la première douille (15) est constituée d'un matériau plus résistant que l'armature magnétique (13).
  7. Soupape d'injection de carburant selon la revendication 5, caractérisée en ce que la deuxième douille (17) est constituée d'un matériau plus résistant que les composants restants de l'aiguille de soupape (7).
  8. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que la première douille (15) est fixée sur l'armature magnétique (13) au moyen d'un engagement par coopération de formes et/ou par friction et/ou par liaison de matière.
  9. Soupape d'injection de carburant selon la revendication 5, caractérisée en ce que la deuxième douille (17) est fixée sur l'aiguille de soupape (7) au moyen d'un engagement par coopération de formes et/ou par friction et/ou par liaison de matière.
EP13152627.9A 2012-02-15 2013-01-25 Soupape d'injection de combustible Not-in-force EP2628941B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012202253A DE102012202253A1 (de) 2012-02-15 2012-02-15 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP2628941A1 EP2628941A1 (fr) 2013-08-21
EP2628941B1 true EP2628941B1 (fr) 2014-09-03

Family

ID=47683546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13152627.9A Not-in-force EP2628941B1 (fr) 2012-02-15 2013-01-25 Soupape d'injection de combustible

Country Status (3)

Country Link
US (1) US10428779B2 (fr)
EP (1) EP2628941B1 (fr)
DE (1) DE102012202253A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2863042B1 (fr) * 2013-10-15 2016-06-22 Continental Automotive GmbH Soupape d'injection
EP2863045B1 (fr) * 2013-10-15 2016-09-14 Continental Automotive GmbH Procédé de fabrication d'un injecteur pour moteur à combustion, ensemble d'aiguille-armature et injecteur de fluide
EP3339626A1 (fr) * 2016-12-23 2018-06-27 Continental Automotive GmbH Ensemble de soupape comprenant une armature avec surfaces de guidage et passages d'écoulement et soupape d'injection
DE102017222985A1 (de) * 2017-12-18 2019-06-19 Robert Bosch Gmbh Ventil, insbesondere Saugventil,in einer Hochdruckpumpe eines Kraftstoffeinspritzsystems

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4311280A (en) * 1980-07-21 1982-01-19 General Motors Corporation Electromagnetic fuel injector with adjustable armature spring
US4586656A (en) * 1984-08-14 1986-05-06 United Technologies Diesel Systems, Inc. Solenoid valve, particularly as bypass valve with fuel injector
US5950693A (en) * 1993-04-28 1999-09-14 Advanced Delivery & Chemical Systems, Ltd. Bulk chemical delivery system
DE19756103A1 (de) * 1997-12-17 1999-06-24 Bosch Gmbh Robert Brennstoffeinspritzventil
US6056264A (en) * 1998-11-19 2000-05-02 Cummins Engine Company, Inc. Solenoid actuated flow control valve assembly
DE10039083A1 (de) * 2000-08-10 2002-02-21 Bosch Gmbh Robert Brennstoffeinspritzventil
WO2002042632A2 (fr) * 2000-11-23 2002-05-30 Robert Bosch Gmbh Electrovanne destinee a la commande d'une soupape d'injection d'un moteur a combustion interne
DE10065528A1 (de) * 2000-12-28 2002-07-04 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10108945A1 (de) * 2001-02-24 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10124743A1 (de) * 2001-05-21 2002-11-28 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10130205A1 (de) * 2001-06-22 2003-01-02 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10136808A1 (de) * 2001-07-27 2003-02-13 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10140795A1 (de) * 2001-08-20 2003-03-06 Bosch Gmbh Robert Brennstoffeinspritzventil
DE102004024533A1 (de) * 2004-05-18 2005-12-15 Robert Bosch Gmbh Brennstoffeinspritzventil
US20070007363A1 (en) * 2005-07-04 2007-01-11 Hitachi, Ltd. Fuel injection valve
JP4637930B2 (ja) * 2008-05-22 2011-02-23 三菱電機株式会社 燃料噴射弁
JP5178683B2 (ja) * 2009-10-21 2013-04-10 日立オートモティブシステムズ株式会社 電磁式燃料噴射弁
JP5218487B2 (ja) * 2009-12-04 2013-06-26 株式会社デンソー 燃料噴射弁
JP5768536B2 (ja) * 2010-10-05 2015-08-26 株式会社デンソー 燃料噴射弁
US8960156B2 (en) * 2011-02-28 2015-02-24 Volvo Lastvagnar Ab Injector sleeve

Also Published As

Publication number Publication date
US10428779B2 (en) 2019-10-01
US20130206872A1 (en) 2013-08-15
EP2628941A1 (fr) 2013-08-21
DE102012202253A1 (de) 2013-08-22

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