EP2084391B1 - Dispositif à soupape d'injection de carburant - Google Patents

Dispositif à soupape d'injection de carburant Download PDF

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Publication number
EP2084391B1
EP2084391B1 EP07819977A EP07819977A EP2084391B1 EP 2084391 B1 EP2084391 B1 EP 2084391B1 EP 07819977 A EP07819977 A EP 07819977A EP 07819977 A EP07819977 A EP 07819977A EP 2084391 B1 EP2084391 B1 EP 2084391B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
valve
injection valve
fuel
valve piston
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
EP07819977A
Other languages
German (de)
English (en)
Other versions
EP2084391A1 (fr
Inventor
Wolfgang Stoecklein
Holger Rapp
Andreas Rettich
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 EP2084391A1 publication Critical patent/EP2084391A1/fr
Application granted granted Critical
Publication of EP2084391B1 publication Critical patent/EP2084391B1/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
    • 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
    • F02M63/0077—Valve seat 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
    • 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
    • F02M63/0031—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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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

Definitions

  • the invention relates to a fuel injection valve device having a valve piston which has a valve piston end which delimits a valve control chamber and is guided in the axial direction in a guide section.
  • a fuel injection valve with a valve housing in which a valve seat body is received, which is also referred to as a valve piece.
  • a valve piston is guided in a guide portion of the valve piece.
  • the valve piece in the region of the guide portion is surrounded by high pressure.
  • a fuel injection valve which has a valve piston guided in a valve piece.
  • the valve piston has, on its end remote from the nozzle, an end face with which the valve piston defines a control chamber, wherein a recess is formed in the end face.
  • the object of the invention is to provide a fuel injection valve device according to the preamble of To create claim 1, which is simple and inexpensive to produce.
  • a fuel injection valve device having a valve piston which has a valve piston end which delimits a valve control chamber and is guided in the axial direction in a guide section, characterized in that the guided valve piston end has a blind hole extending in the axial direction which opens towards the valve control chamber is.
  • the valve control room is also referred to as a control room.
  • the central blind hole in the guided valve piston end is directly connected to the control chamber and filled with fuel which has the same pressure as the fuel in the control chamber.
  • the control chamber is, preferably via an inlet throttle, in communication with a high-pressure fuel storage, from which the control chamber is supplied with fuel, which is acted upon by high pressure.
  • the guided valve piston end is deformed in the guide section, in particular widened, so that a guide play between the guided valve piston end and the guide section becomes smaller with increasing pressure. Thereby, the leakage between the valve piston and the guide portion can be significantly reduced.
  • a preferred embodiment of the fuel injection valve device is characterized in that the blind hole extends in the region of the guide section. This will be a ensures uniform deformation of the valve piston end in the region of the guide section.
  • Another preferred embodiment of the fuel injection valve device is characterized in that the guide portion and the control space are provided in a housing body of the fuel injection valve device. This has the advantage that a separate valve piece can be omitted.
  • a further preferred embodiment of the fuel injection valve device is characterized in that the guide section and the control chamber are provided in a common recess of the housing body. This simplifies the manufacture of the fuel injection valve device.
  • a further preferred embodiment of the fuel injection valve device is characterized in that the recess has the shape of a straight circular cylinder.
  • the recess is preferably formed by a blind hole or a blind bore in the housing body.
  • a further preferred exemplary embodiment of the fuel injection valve device is characterized in that a fuel feed channel originates from the recess.
  • a fuel feed channel originates from the recess.
  • fuel inlet channel of the control chamber is filled with fuel.
  • the fuel inlet channel is equipped with an inlet throttle.
  • a further preferred exemplary embodiment of the fuel injection valve device is characterized in that a fuel discharge channel originates from the recess.
  • the control space can be connected to a pressure relief space in order to specifically reduce the pressure in the control space.
  • the fuel drain channel is equipped with an outlet throttle.
  • the blind hole is formed by a central blind bore.
  • the diameter of the blind hole and / or the wall thickness of the valve piston end in the region of the blind hole are / is designed so that at maximum pressure, that is at maximum deformation of the valve piston end, a minimal clearance between the valve piston end and the guide section remains. As a result, unwanted clamping of the valve piston end is reliably prevented.
  • FIG. 1 shows in a partial axial sectional view of a conventional fuel injection valve device with a valve housing 1, which is also referred to as Injektorgepuruse.
  • the fuel injection valve device is used in particular for the direct injection of fuel, in particular of diesel fuel, into a combustion chamber of a mixture of compression-ignition internal combustion engine.
  • the fuel injection valve according to the invention is suitable for other applications.
  • the valve housing or injector housing 1 comprises an injector housing basic body 2 into which a valve piece 4 is screwed.
  • the valve piece 4 comprises a valve seat body 5, which is provided with a funnel-shaped recess 6.
  • the funnel-shaped recess 6 forms a valve seat surface against which a valve closing body (not shown) can come into sealing engagement.
  • the valve seat body 6 On its side facing away from the funnel-shaped depression 6, the valve seat body 6 is integrally connected to a guide body 8, which has a central blind hole, which has a guide section 9 includes.
  • a valve piston end 11 of a valve piston 12 is guided reciprocally movable.
  • the valve piston 12 is, for example, a valve pin or anchor bolt of the fuel injection valve device.
  • the valve piston 12 may also be a part of a nozzle needle of a fuel injector. Between the valve piston end 11 and the guide portion 9 of the guide body 8, a leakage gap 14 is formed.
  • the valve piston end 11 defines with its end face a valve control chamber 18 which is filled with fuel.
  • a fuel drain passage 19 which opens into the funnel-shaped recess 6 of the valve seat body 5.
  • the fuel drain passage 19 extends, relative to the longitudinal axis of the valve piston 12 in the axial direction and is closable in the mouth region of the funnel-shaped recess 6 through the valve closing body of the fuel injection valve device.
  • About the fuel drain passage 19 of the valve control chamber 18 with a (not shown) pressure relief space can be connected.
  • the fuel drain passage 19 is equipped with a fuel flow restrictor.
  • the valve control chamber 18 is connected to an annular space 22.
  • the fuel inlet passage 20 is equipped with a fuel inlet throttle.
  • the annular space 22 is (not shown) in communication with a central high-pressure fuel storage, from the the annular space 22 is supplied with fuel, which is acted upon by high pressure. Due to the high pressure in the valve control chamber 18 of the guide body 8 of the valve member 4 is deformed so that the guide clearance and thus the gap height of the valve piston 12 is smaller. This effect means that with increasing pressure, the leakage through the leakage gap or guide gap 15 becomes smaller and smaller. Thereby, the total leakage of the fuel injection valve device can be reduced.
  • FIG. 2 a fuel injection valve device according to an embodiment of the invention is shown.
  • the fuel injection valve device which is also referred to as an injector or fuel injector, comprises an injector housing 31 with an injector housing body 32.
  • the injector housing body 32 comprises a funnel-shaped recess 36 and a central blind hole 38.
  • the central blind hole 38 has essentially the shape of a right circular cylinder and comprises one Guide portion 39 for a valve piston end 41 of a valve piston 42. Between the valve piston end 41 and the guide portion 39, a leakage gap 44 is formed, which is also referred to as a guide gap.
  • the valve piston 42 acts with its one end (shown cut off) on a (not shown) valve needle, through which the injection of fuel into a combustion chamber of a Internal combustion engine is controlled.
  • the other end of the valve piston 42 which is designated 41, defines with its end face a valve control chamber 48.
  • the valve control chamber 48 is connected via a fuel drain channel 49 with a pressure relief space in connection.
  • the fuel drain channel 49 opens in the center of the funnel-shaped recess 36 and is closed by a (not shown) valve closing body.
  • the fuel drain channel 49 is equipped with a fuel flow restrictor.
  • the valve control chamber 48 is connected via a fuel inlet channel 50 with a central high-pressure fuel storage in combination.
  • the fuel inlet channel 50 is equipped with a fuel inlet throttle.
  • Both the fuel drain channel 49 and the fuel inlet channel 50 and the blind hole 38 and the funnel-shaped recess 36 are provided on or in the Injektorgekoruse emotions. Further, additional components, such as those from the German patent application DE 100 52 604 A1 known valve piece, can be omitted.
  • the valve piston end 41 has a central blind hole 54, which extends from the end face of the valve piston end 41 delimiting the valve control chamber 48 into the valve piston 42.
  • the central blind hole 54 is connected directly to the valve control chamber 48.
  • the diameter of the central blind hole 54 or the wall thickness of the central blind hole 54 surrounding valve piston end 41 are designed so that at maximum pressure, the means at a maximum deformation of the valve piston end 41, the guide clearance in the guide gap 44 is under no circumstances less than zero. This prevents unwanted clamping of the valve piston end 41 in the guide section 39.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (7)

  1. Dispositif de soupape d'injection de carburant comprenant un piston de soupape (42) qui présente une extrémité de piston de soupape (41) qui limite un espace de commande de soupape (48) et qui est guidée dans la direction axiale dans une portion de guidage (39), l'extrémité de piston de soupape guidée (41) présentant un trou borgne central (54) s'étendant dans la direction axiale, qui est ouvert vers l'espace de commande de soupape (48), caractérisé en ce que l'extrémité de piston de soupape guidée (41) est déformée dans la portion de guidage (39) par la haute pression régnant dans l'espace de commande et le trou borgne central (54) associé à celui-ci, de telle sorte qu'une fente de guidage (44) entre l'extrémité de piston de soupape guidée (41) et la portion de guidage (39) devienne plus petite avec l'augmentation de la pression, de sorte que la fuite entre le piston de soupape (41) et la portion de guidage (39) soit réduite de manière significative, et le diamètre du trou borgne central (54) et l'épaisseur de paroi de l'extrémité de piston de soupape (41) entourant le trou borgne central (54) sont conçus de telle sorte que, pour une pression maximale se produisant, un jeu minimal (44) subsiste entre l'extrémité de piston de soupape (41) et la portion de guidage (39).
  2. Dispositif de soupape d'injection de carburant selon la revendication 1, caractérisé en ce que le trou borgne (54) s'étend dans la région de la portion de guidage (39).
  3. Dispositif de soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce que la portion de guidage (39) et l'espace de commande de soupape (48) sont prévus dans un corps de boîtier (32) du dispositif de soupape d'injection de carburant.
  4. Dispositif de soupape d'injection de carburant selon la revendication 3, caractérisé en ce que la portion de guidage (39) et l'espace de commande (48) sont prévus dans un évidement commun (38) du corps de boîtier (2).
  5. Dispositif de soupape d'injection de carburant selon la revendication 4, caractérisé en ce que l'évidement (38) présente la forme d'un cylindre circulaire droit.
  6. Dispositif de soupape d'injection de carburant selon la revendication 4 ou 5, caractérisé en ce qu'un canal d'amenée de carburant (50) part de l'évidement (38).
  7. Dispositif de soupape d'injection de carburant selon l'une quelconque des revendications 4 à 6, caractérisé en ce qu'un canal d'écoulement de carburant part de l'évidement (38).
EP07819977A 2006-10-23 2007-08-28 Dispositif à soupape d'injection de carburant Not-in-force EP2084391B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006049830A DE102006049830A1 (de) 2006-10-23 2006-10-23 Kraftstoffeinspritzventileinrichtung
PCT/EP2007/058914 WO2008049665A1 (fr) 2006-10-23 2007-08-28 Dispositif à soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP2084391A1 EP2084391A1 (fr) 2009-08-05
EP2084391B1 true EP2084391B1 (fr) 2011-04-13

Family

ID=38826441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07819977A Not-in-force EP2084391B1 (fr) 2006-10-23 2007-08-28 Dispositif à soupape d'injection de carburant

Country Status (5)

Country Link
EP (1) EP2084391B1 (fr)
CN (1) CN101529079B (fr)
AT (1) ATE505639T1 (fr)
DE (2) DE102006049830A1 (fr)
WO (1) WO2008049665A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2778386B1 (fr) * 2013-03-13 2016-03-09 Delphi International Operations Luxembourg S.à r.l. Ensemble soupape de commande et injecteur de carburant comprenant un ensemble soupape de commande
DE102013224404A1 (de) 2013-11-28 2015-05-28 Robert Bosch Gmbh Kraftstoffinjektor
GB201412086D0 (en) * 2014-07-08 2014-08-20 Delphi International Operations Luxembourg S.�.R.L. Fuel injector for an internal combustion engine
EP3290684A1 (fr) 2016-08-31 2018-03-07 Continental Automotive GmbH Injecteur de fluide et aiguille d'injecteur de fluide
DE102016222871A1 (de) * 2016-11-21 2018-05-24 Robert Bosch Gmbh Kraftstoffinjektor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1072770C (zh) * 1996-12-19 2001-10-10 日野汽车工业株式会社 喷射燃料用的喷射器
DE10001099A1 (de) * 2000-01-13 2001-08-02 Bosch Gmbh Robert Steuerventil für einen Injektor eines Kraftstoffeinspritzsystems für Brennkraftmaschinen mit Druckerhöhung im Steuerraum
DE10152268A1 (de) * 2001-10-20 2003-04-30 Bosch Gmbh Robert Einspritzventil
DE10211439A1 (de) * 2002-03-15 2003-10-02 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine

Also Published As

Publication number Publication date
WO2008049665A1 (fr) 2008-05-02
CN101529079B (zh) 2012-06-06
DE502007006957D1 (de) 2011-05-26
DE102006049830A1 (de) 2008-04-24
EP2084391A1 (fr) 2009-08-05
ATE505639T1 (de) 2011-04-15
CN101529079A (zh) 2009-09-09

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