EP1105638B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1105638B1
EP1105638B1 EP00949065A EP00949065A EP1105638B1 EP 1105638 B1 EP1105638 B1 EP 1105638B1 EP 00949065 A EP00949065 A EP 00949065A EP 00949065 A EP00949065 A EP 00949065A EP 1105638 B1 EP1105638 B1 EP 1105638B1
Authority
EP
European Patent Office
Prior art keywords
actuator
fuel injection
valve
injection valve
activation 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
EP00949065A
Other languages
German (de)
English (en)
Other versions
EP1105638A1 (fr
Inventor
Wolfgang Ruehle
Hubert Stier
Matthias Boee
Guenther Hohl
Norbert Keim
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 EP1105638A1 publication Critical patent/EP1105638A1/fr
Application granted granted Critical
Publication of EP1105638B1 publication Critical patent/EP1105638B1/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
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means

Definitions

  • the invention is based on a fuel injector according to the genus of the main claim.
  • DE 195 34 445 C2 describes a fuel injector known according to the genus of the main claim. That from this Document resulting fuel injector has an actuator arranged in an actuator space and one of the actuator can be actuated by means of a valve needle Valve closing body with a valve seat surface to one Sealing seat cooperates on.
  • the valve needle is positively connected to a pressure shoulder, via which the actuator against the force of a compression spring on the Valve needle acts.
  • the pressure shoulder and the Valve needle guided in a valve housing.
  • the actuator points a central recess through which the valve needle protrudes through, the actuator on the one hand on a Pressure plate and on the other hand supported on the pressure shoulder. When the actuator expands, the valve needle actuated against the spray direction.
  • Fuel injector is the actuator to reach the movement reversal has a central recess.
  • Fuel injector must therefore have special actuators are manufactured, which production is also complex.
  • the actuator must be particularly stable and actuating force certain predetermined characteristic values achieve what is difficult by the central hole, so that the circular actuator compared to one massive actuator a significantly larger diameter having.
  • the fuel injector according to the invention with the has characteristic features of the main claim in contrast the advantage that any actuators, in particular, solid actuators without an inner bore are used can be.
  • the invention Fuel injector with simple components realize, so that also save production costs to let.
  • the support body is advantageously disk-shaped educated.
  • the actuator lies with a level first Face flat on a surface of the support body.
  • the support body is preferred by welding on a valve housing of the Fuel injector attached.
  • This is one given simple embodiment, in which a Actuation of the actuator against the actuating sleeve stationary support body fixed in the valve housing moves.
  • the actuating sleeve has three in relation on an axis of the actuating sleeve at least approximately segments offset by 120 °. This gives an actuating sleeve in which with a even construction with little construction effort an actuating force of the actuator over the scope of Actuation sleeve is given.
  • the support body three in relation to a valve axis of the fuel injector at least approximately 120 ° apart has arranged recesses and that through each Recess protrudes at least one segment of the actuating sleeve. This provides a support body that extends over the circumference of the Actuating sleeve evenly distributed recesses and at the same time high stability to accommodate the Has actuating force of the actuator.
  • the segments of the Actuating sleeve at the first end of the actuating sleeve with a valve needle plate connected to the valve needle connected is a simple embodiment given where the actuator is directly over the actuating sleeve acts on the valve needle.
  • the actuating sleeve on the second End of the actuating sleeve has a contact plate which is connected to the segments of the actuating sleeve.
  • the Contact plate a flat surface on which an actuator with a flat second end face lies flat, creating a advantageous transmission of the actuating force of the actuator the actuating sleeve is given.
  • the actuator is advantageously one of the Contact plate of the actuating sleeve acting on the actuator Preload spring loaded with a pretension. Thereby is a compact design of the fuel injector given.
  • the actuating sleeve and / or are advantageously the pressure plate by cold forming a metallic Made of material. This makes the actuating sleeve and / or the printing plate is resistant to aging and insensitive to heat, with an additional one advantageous removal of the actuation of the actuator heat generated by the actuator to a valve housing of the Fuel injector and the fuel is given. This manufacture is also inexpensive.
  • Fig. 1 shows in - a partial axial - Sectional view of a fuel injector according to the invention 1.
  • the fuel injector 1 is used especially for direct fuel injection, especially of gasoline, into a combustion chamber mixture-compression-ignition internal combustion engine as so-called gasoline direct injection valve.
  • gasoline direct injection valve a combustion chamber mixture-compression-ignition internal combustion engine
  • fuel injector 1 is also suitable for other applications.
  • a fuel injector In order for a fuel injector to be direct Injecting fuel into a combustion chamber Internal combustion engine a desired amount of fuel and a desired fuel distribution in the combustion chamber To reach the internal combustion engine, it makes sense to use the fuel injector 1 as an inside opening injection valve 1 perform.
  • the fuel injector 1 has a valve housing 2, one at the spray-side end of the valve housing 2 attached valve seat body 3 and a valve cover 4, the with the valve housing 2 on the valve seat body 3 opposite end of the valve housing 2 is connected, on.
  • the valve housing 2 also has a cutout 5 on, through which a side of the fuel injector 1 arranged fuel inlet connector is given.
  • a sealing element 8 To one via the recess 5 in a fuel chamber 6 of the Valve housing 2 inflowing fuel on entering an actuator chamber 7 of the fuel injection valve 1 prevent, the fuel chamber 6 is opposite the actuator chamber 7 with a sealing element 8, in particular with a annular plastic seal made of an elastomer can exist, sealed.
  • the sealing element 8 is located here on an inner surface 9 of the valve housing 2 and on one Valve needle 10 on.
  • the valve needle 10 is with a Valve closing body 11 connected to one at the Valve seat body 3 formed valve seat surface 12 a sealing seat cooperates.
  • the Valve needle 10 lifts the valve closing body 11 from the Valve seat surface 12 of the valve seat body 3, whereby the Fuel from the fuel chamber 6 is preferably not over drawn swirl grooves in the valve needle 10 and / or the valve closing body 11 are formed in a spray orifice 13 flows out of the fuel injector 1 is hosed.
  • the actuator space 7 there is a disk-shaped one Support body 20 which with a weld 21 to the Valve housing 2 of fuel injector 1 is welded on.
  • a contact surface 22 of the Support body 20 perpendicular to a valve axis 23 of the Fuel injector 1 oriented.
  • the support body 20 has three recesses 24a, 24b, 24c, of which in the 1 shows only the cutout 24a is visible. Extends through each of the recesses 24a, 24b, 24c one of the segments 25a, 25b, 25c of an actuating sleeve 26, only the segment 25a being visible in the sectional view is.
  • the actuating sleeve 26 is at a first end 27 of the Actuation sleeve 26 with a valve needle plate 28 connected, the valve needle plate 28 with the Valve needle 10 is connected. At a second end 29 the Actuating sleeve 26 has an actuating sleeve 26 Contact plate 30 on the segments 25a, 25b, 25c Actuating sleeve 26 is connected. There is one Contact surface 31 of the contact plate 30 perpendicular to the Valve axis 23 oriented.
  • a piezoelectric or magnetostrictive actuator 32 In the actuator chamber 7 of the fuel injection valve 1 is a piezoelectric or magnetostrictive actuator 32, the longitudinal the valve axis 23 is oriented between the support body 20 and the contact plate 30 are arranged.
  • the actuator 32 On a flat First end face 33 of the actuator 32, the actuator 32 lies flat on the flat contact surface 22 of the support body 20.
  • the actuator 32 At the flat second end face 34 of the actuator 32 is the actuator 32 flat on the flat contact surface 31 of the contact plate 30 on.
  • the first end face 33 and the second End face 34 facing away from each other and perpendicular to each the valve axis 23 oriented.
  • the segments 25a, 25b, 25c the actuation sleeve 26 are around an outer surface 35 of the Actuator 32 arranged, in this embodiment the segments 25a, 25b, 25c on the lateral surface 35 of the actuator 32 concerns. Since the segments 25a, 25b, 25c at least oriented approximately parallel to the valve axis 23 are segments 25a, 25b, 25c at least approximately perpendicular to the contact plate 30 and the disc-shaped support body 20 oriented, whereby the Actuating sleeve 26 the actuator 32 on the second end face 34 of the actuator 32 with the contact plate 30 of the Grips actuating sleeve 26.
  • a compression spring 40 arranged, on the one hand at the with the Valve housing 2 connected valve cover 4 and the other is supported on the contact plate 30 of the actuating sleeve 26.
  • the compression spring 40 becomes the actuator 32 with a bias acts, the compression spring 40 on the contact plate 30 of the actuating sleeve 26 in the direction of the Valve closing body 11 and the valve seat surface 12 of the Valve seat body 3 acts sealing seat.
  • the actuator 32 When the actuator 32 is actuated, it expands, whereby it with the valve housing 2 of the fuel injector 1 connected support body 20 supports and thus the Actuating sleeve 26 against the force of the compression spring 40 in the actuator room 7 moves.
  • the actuator 32 acts on the Contact plate 30 of the actuating sleeve 26, which over the Segments 25a, 25b, 25c with the valve needle plate 28 connected is. Therefore, the actuator 32 acts on the Actuating sleeve 26 on the valve closing body 11 of the Valve needle 10, whereby when the Actuator 32 of the valve closing body 11 from the Valve seat surface 12 of the valve seat body 3 lifts and the Sealing seat is opened. Because when the actuator is actuated 32 the actuating sleeve 26 against the spray direction 41 of the fuel injector 1 is moved, the Valve closing body 11 against the spray direction 41 emotional.
  • valve axis 23 shows one perpendicular to the valve axis 23 oriented section through the fuel injector 1 along the section line marked II in FIG. 1. Elements already described are included matching reference numerals.
  • the disc-shaped support body 20 is with one in this Embodiment three-part weld seam 21 with the valve housing 2 of the fuel injector 1 connected.
  • the connection can also be made via individual Spot welds or otherwise, e.g. B. by brazing or flanging.
  • a collar can be formed which has a support surface, on which the support body 20 against the actuating force of the Actuator 32 is supported so that the support body 32 also without an integral fastening in the valve housing 2 of the fuel injector 1 can be arranged.
  • the support body 20 has cutouts 24a, 24b, 24c which with respect to the valve axis 23 at least approximately 120 ° offset from each other.
  • the Recesses 24a, 24b, 24c each project one of the segments 25a, 25b, 25c of the actuating sleeve 26.
  • the segments 25a, 25b, 25c of the actuating sleeve 26 with respect to an in this embodiment with the valve axis 23 coinciding axis of the actuating sleeve 26 at least arranged approximately 120 ° apart. It can also several segments of the actuating sleeve 26 through a recess of the support body 20 protrude.
  • the support body 20 can also be profiled, be designed in particular as a profiled metal sheet, so that the contact surface 22 of the support body 20 no longer is completely flat.
  • the invention is not based on the described Embodiment limited.
  • the Invention also in an externally opening fuel injector 1 apply.

Landscapes

  • Engineering & Computer Science (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 (1), notamment injecteur pour une installation d'injection de carburant dans un moteur à combustion interne, comportant un actionneur (32) piézo-électrique ou magnétostrictif ainsi qu'un organe d'obturation de soupape (11) actionné par l'actionneur (32) par l'intermédiaire d'une aiguille d'injecteur (10), cet organe d'obturation coopérant avec une surface de siège de soupape (12) pour former un siège d'étanchéité,
    l'actionneur (32) s'appliquant contre une première face frontale (33) d'un organe d'appui (20) et il est prévu un manchon d'actionnement (26) agissant par une première extrémité (27) sur l'aiguille d'injecteur (10) et par une seconde extrémité (29) le manchon entoure une seconde face frontale (34) de l'actionneur (32), face opposée à sa première face frontale (33),
    caractérisée en ce que
    le manchon d'actionnement (26) comporte trois segments (25a, 25b, 25c) décalés au moins sensiblement de 120° par rapport à l'axe du manchon d'actionnement (26) et chaque fois un segment (25a, 25b, 25c) du manchon d'actionnement (26) vient à travers une découpe (24a, 24b, 24c) de l'organe d'appui (20).
  2. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    l'organe d'appui (20) est en forme de rondelle.
  3. Soupape d'injection de carburant selon la revendication 1 ou 2,
    caractérisée en ce que
    l'organe d'appui (20) est fixé au boítier (2) de la soupape d'injection de carburant (1) notamment par soudage.
  4. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    l'organe d'appui (20) comporte trois découpes (24a, 24b, 24c) décalées sensiblement de 120° par rapport à l'axe (23) de la soupape d'injection de carburant (1).
  5. Soupape d'injection de carburant selon l'une des revendications 1 à 4,
    caractérisée en ce que
    les segments (25a, 25b, 25c) du manchon d'actionnement (26) sont reliés à la première extrémité (27) du manchon d'actionnement (26) par une plaque d'aiguille d'injecteur (28) reliée à l'aiguille d'injecteur (10).
  6. Soupape d'injection de carburant selon l'une des revendications 1 à 5,
    caractérisée en ce que
    le manchon d'actionnement (26) comporte une plaque d'appui (30) à la seconde extrémité (29) du manchon d'actionnement (26), cette plaque étant reliée aux segments (25a, 25b, 25c) du manchon d'actionnement (26).
  7. Soupape d'injection de carburant selon la revendication 6,
    caractérisée en ce que
    l'actionneur (32) est sollicité avec précontrainte par un ressort de compression (40) agissant par l'intermédiaire de la plaque d'appui (30) du manchon d'actionnement (26) sur l'actionneur (32).
  8. Soupape d'injection de carburant selon l'une des revendication 1 à 7,
    caractérisée en ce que
    le manchon d'actionnement (26) et/ou l'organe d'appui (20) sont réalisés par formage à froid d'une matière métallique.
EP00949065A 1999-06-19 2000-05-26 Soupape d'injection de carburant Expired - Lifetime EP1105638B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19928205 1999-06-19
DE19928205A DE19928205A1 (de) 1999-06-19 1999-06-19 Brennstoffeinspritzventil
PCT/DE2000/001727 WO2000079121A1 (fr) 1999-06-19 2000-05-26 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1105638A1 EP1105638A1 (fr) 2001-06-13
EP1105638B1 true EP1105638B1 (fr) 2004-12-22

Family

ID=7911904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00949065A Expired - Lifetime EP1105638B1 (fr) 1999-06-19 2000-05-26 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US6517014B1 (fr)
EP (1) EP1105638B1 (fr)
JP (1) JP2003502574A (fr)
DE (2) DE19928205A1 (fr)
WO (1) WO2000079121A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946869A1 (de) * 1999-09-30 2001-04-05 Bosch Gmbh Robert Brennstoffeinspritzventil
US8387900B2 (en) * 2011-06-24 2013-03-05 Weidlinger Associates, Inc. Directly-actuated piezoelectric fuel injector with variable flow control
US20130068200A1 (en) * 2011-09-15 2013-03-21 Paul Reynolds Injector Valve with Miniscule Actuator Displacement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5482213A (en) * 1993-05-31 1996-01-09 Aisin Seiki Kabushiki Kaisha Fuel injection valve operated by expansion and contraction of piezoelectric element
DE19534445C2 (de) 1995-09-16 1998-07-30 Man Nutzfahrzeuge Ag Einspritzventil für Brennkraftmaschinen
DE50010902D1 (de) * 1999-04-20 2005-09-15 Siemens Ag Fluiddosiervorrichtung
DE19946603B4 (de) * 1999-09-29 2009-01-15 Robert Bosch Gmbh Brennstoffeinspritzventil mit kompensierenden Dichtelementen
US6400066B1 (en) * 2000-06-30 2002-06-04 Siemens Automotive Corporation Electronic compensator for a piezoelectric actuator

Also Published As

Publication number Publication date
WO2000079121A1 (fr) 2000-12-28
DE50009023D1 (de) 2005-01-27
US6517014B1 (en) 2003-02-11
JP2003502574A (ja) 2003-01-21
EP1105638A1 (fr) 2001-06-13
DE19928205A1 (de) 2000-12-21

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