EP1373714B1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

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Publication number
EP1373714B1
EP1373714B1 EP02737752A EP02737752A EP1373714B1 EP 1373714 B1 EP1373714 B1 EP 1373714B1 EP 02737752 A EP02737752 A EP 02737752A EP 02737752 A EP02737752 A EP 02737752A EP 1373714 B1 EP1373714 B1 EP 1373714B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
nozzle body
centering
holding body
valve
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
EP02737752A
Other languages
German (de)
English (en)
Other versions
EP1373714A1 (fr
Inventor
Wolfgang Stoecklein
Dietmar Schmieder
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 EP1373714A1 publication Critical patent/EP1373714A1/fr
Application granted granted Critical
Publication of EP1373714B1 publication Critical patent/EP1373714B1/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
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration
    • 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 is based on an injection valve, in particular for an internal combustion engine of a motor vehicle, according to the type defined in more detail in the preamble of patent claim 1.
  • Such a valve is known in practice and can be used in particular in conjunction with common rail accumulator injection systems for diesel internal combustion engines.
  • a known injection valve of the aforementioned type comprises a nozzle body in which a nozzle needle is guided axially displaceable and which has, for example, six defined openings, which lead to the combustion chamber of the internal combustion engine and are controlled by means of the nozzle needle.
  • the openings are in installation position of the injection valve arranged so that a defined injection angle and a defined injection direction are ensured.
  • the nozzle needle is actuated by means of a valve-like actuating device, which is arranged in a so-called holding body.
  • the actuating device may be equipped, for example, with a piezoelectric actuator unit which serves for the axial displacement of a so-called actuating piston, which cooperates via a hydraulic coupler with a so-called actuating piston, which in turn is connected to a valve closing member, that pressure changes are generated in a so-called valve control chamber can.
  • the pressure changes in the valve control chamber lead to an axial displacement of the nozzle needle, which in turn are released or closed the leading to the combustion chamber of the internal combustion engine openings.
  • the holding body has wrench surfaces which serve for fixing and adjusting the injection valve on a cylinder head of the internal combustion engine.
  • the holding body and the nozzle body have a defined orientation to each other. This has hitherto been ensured by centering pins arranged in bores of the holding body or of the nozzle body.
  • centering pin holes reduce the high-pressure resistance of the nozzle body, which can have a negative effect, in particular in the case of common rail injection valves in which pressures of up to 1.4 kbar prevail. Also cause bore tolerances of the centering pins receiving holes inaccurate angular centering of the nozzle body and holder body.
  • an injection valve which has a holding body and a nozzle body.
  • a flattening or a groove is formed, which serves to align the nozzle body relative to the holding body.
  • the injection valve according to the invention with the features according to the preamble of claim 1, wherein the nozzle body has on its peripheral surface means for attacking a centering tool, has the advantage that at least for angular orientation or angular centering of the nozzle body relative to the holding body cylinder pins omitted since the nozzle body can be aligned relative to the holding body by means of a centering tool which can be attached to the outside of the nozzle body.
  • the means for attacking a centering tool are formed as at least one planar surface, which is arranged on the circumference of the nozzle body.
  • a surface provides a simple way of attacking a correspondingly formed centering tool with at least one corresponding, engaging on the flat surface centering nose.
  • the nozzle body may have two planar surfaces arranged on opposite sides.
  • an embodiment with only one flat surface offers the advantage that the risk is low, the nozzle body relative to the holder body to rotate by 180 °, which would lead to a misalignment and would make the injector unusable.
  • the nozzle body on its peripheral surface with at least one groove or a blind hole-like bore into which a corresponding centering tool can engage.
  • the nozzle body and the holding body are connected to each other via a nozzle retaining nut.
  • the nozzle body has an increased wall thickness in the region which is covered by the nozzle retaining nut.
  • the means for attacking the centering tool are formed in this area, so that they are at least partially covered by the nozzle lock nut.
  • the pressure holding capacity of the injection valve by the means for the attack of the centering tool which may be formed, for example, as a ground surfaces guaranteed.
  • the nozzle body relative to the holding body can be aligned in an advantageous manner so that this surface is arranged parallel to key surfaces of the holding body. But it is also possible any other orientation that allows easy centering.
  • an injection valve 1 is shown, which is intended in particular for fuel injection into a diesel internal combustion engine.
  • the injection valve 1 comprises a valve control unit 2 and a nozzle unit 3 with a nozzle body 4, in which a nozzle needle 5 is arranged axially displaceable.
  • the nozzle body 4 has at its free end 6 a plurality of openings, not shown here, via which fuel can be injected into a combustion chamber of the internal combustion engine. Depending on the position of the nozzle needle 5, the openings are either opened or closed. On the position of the nozzle needle 5 so an injection process is triggered or stopped.
  • the injection valve 1 For actuating the nozzle needle 5, the injection valve 1, the valve control unit 2, which one with key surfaces Has 33 provided holding body 7 and a subsequent to the holding body 7 in the axial direction of the housing part 8.
  • the nozzle body 4, the housing part 8 and the holding body 7 are clamped together via a nozzle lock nut 9, which rests with a collar 10 on a shoulder 11 of the nozzle body 4 and is fixed by a thread 12 on the holding body 7.
  • the shoulder 11 and / or applied to the shoulder 11 surface of the collar 10 of the nozzle retaining nut 9 may be coated with a sliding material, such as Teflon, so that only a small torque is transmitted to the nozzle body 4 when tightening the nozzle retaining nut 9.
  • a piezoelectric actuator 14 and a connected to the piezoelectric actuator 13, so-called actuating piston 14 are arranged.
  • the piezoelectric actuator 13 is connected via electrical lines 15 with a valve control, not shown here.
  • the actuating piston 14 cooperates via a hydraulic coupler 15 with a so-called actuating piston 16, which is guided in the housing part 8 and is connected to a valve closing member 17.
  • the valve closing member 17 in turn cooperates with a valve seat 18.
  • valve control chamber 19 By actuating the valve closing member 16 by means of the piezoelectric actuator 13, the pressure level in a so-called valve control chamber 19 is adjustable, on the one hand from a spring plate 23, in which an inlet throttle 20 and a valve control unit 2 leading to the outlet throttle 22 are formed, and limited to the other by a valve control piston 24, which forms a structural unit with the nozzle needle 5 and axially displaceable in the spring plate 23 is executed.
  • An axial offset of the valve control piston 24 and thus the nozzle needle 5 can be adjusted via a change in the pressure level in the valve control chamber 19.
  • the inlet throttle 20 connects a high-pressure chamber 21, in which fuel is provided for injection into the combustion chamber of the internal combustion engine, with the valve control chamber 19.
  • An injection start, an injection duration and an injection amount via the openings arranged at the end 6 of the nozzle unit 3 are determined by means of the valve control unit 2.
  • valve closing member 18 In order to initiate an injection process, the valve closing member 18 is actuated by means of the piezoelectric actuator 13, whereby fuel can flow out of the valve control chamber 19 via the outlet throttle 22 and the pressure in the valve control chamber 19 drops. As a result, the valve spool 24 and the nozzle needle 5 connected therewith shifts so that the openings leading to the combustion chamber are released and fuel is injected into the combustion chamber. Accordingly, by closing the valve closing member 17, the injection process is stopped.
  • the nozzle body 4 has in the region of the annular collar 10 of the valve clamping nut 9, two flat surfaces 25 and 26, which are aligned in parallel.
  • the two surfaces 25 and 26 form so-called centering surfaces, which serve for the attachment of a centering tool 30.
  • the centering tool 30 has two centering lugs 31 and 32, each of which can be introduced into a gap between the annular collar 10 of the valve clamping nut 9 and the nozzle body 4 and thus rest against the centering surfaces 25 and 26, as in FIG FIG. 2 and FIG. 3 can be seen.
  • FIG. 3 is a cross section through the nozzle unit 3 and the centering tool 30 with the respective engaging in a gap centering lugs 31 and 32 can be seen. In this view, the nozzle lock nut 9 is not shown.
  • the centering of the nozzle body 4, i. the angular orientation of the nozzle body 4 relative to the holding body 7 is achieved in that the nozzle body 4 by means of the centering tool 30, which rests on the centering surfaces 31 and 32 on the centering surfaces 25 and 26, relative to the holding body 7 is rotated so that the centering surfaces 25 and 26 and the key surfaces 33 which are formed on the holding body 7, each occupy the prescribed and required angular position.
  • FIGS. 4 and 5 an alternative embodiment of a centering tool 40 is shown, by means of which a nozzle body not shown here can be rotated relative to a holding body of an injection valve and thus aligned.
  • the centering tool 40 is constructed cup-shaped and has an axially aligned bore 41, so that the centering tool can be plugged onto the nozzle body.
  • the bore 41 of the centering tool 40 has a conical surface 42 formed in the manner of an attachment, which merges into an axially aligned planar surface 43.
  • the centering tool 40 is placed on the nozzle body, which is pre-assembled via a valve clamping nut with the holding body, so that on the conical surface 42 corresponding to the nozzle body cone surface and on the flat surface 43 a corresponding to the nozzle body abut trained so-called centering nose.
  • the nozzle body in this case has only one centering nose.
  • the centering tool 40 is rotated in the circumferential direction until the prescribed angular position is assumed between the nozzle body and the holding body. Then the valve clamping nut tightened, so that the nozzle body and the holding body are rotatably connected to each other.

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  • 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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Dram (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Claims (2)

  1. Soupape d'injection, en particulier pour un moteur à combustion interne, comprenant au moins un corps de buse (4) dans lequel est guidée, de manière déplaçable axialement, une aiguille de buse (5), ainsi qu'un corps de retenue (7) au moins d'une seule pièce, dans lequel sont disposés des moyens pou actionner l'aiguille de buse (5), le corps de buse (4) présentant, sur sa surface périphérique, au moins une surface plane (25, 26) pour s'engager avec un outil de centrage (30), caractérisée en ce que le corps de buse (4) et le corps de retenue (7) sont connectés l'un à l'autre par le biais d'un écrou de serrage de buse (9), qui recouvre au moins en partie l'au moins une surface plane (25, 26).
  2. Procédé de montage d'une soupape d'injection, en particulier pour un moteur à combustion interne, comprenant au moins un corps de buse (4), dans lequel est guidée de manière déplaçable axialement une aiguille de buse (5), ainsi qu'un corps de retenue (7) au moins d'une seule pièce, dans lequel sont disposés des moyens pour actionner l'aiguille de buse (5), le corps de buse (4) présentant, sur sa surface périphérique, au moins une surface plane (25, 26) pour s'engager avec un outil de centrage (30), et le corps de buse (4) et le corps de retenue (7) étant connectés l'un à l'autre par le biais d'un écrou de serrage de buse (9), qui recouvre au moins en partie l'au moins une surface plane (25, 26), le corps de retenue (7) présentant au moins deux méplats (33), caractérisé en ce que les au moins deux méplats (33) sont orientés essentiellement parallèlement à l'au moins une surface plane (25, 26).
EP02737752A 2001-03-29 2002-03-26 Soupape d'injection Expired - Lifetime EP1373714B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10115649 2001-03-29
DE10115649 2001-03-29
PCT/DE2002/001092 WO2002079636A1 (fr) 2001-03-29 2002-03-26 Soupape d'injection

Publications (2)

Publication Number Publication Date
EP1373714A1 EP1373714A1 (fr) 2004-01-02
EP1373714B1 true EP1373714B1 (fr) 2010-07-28

Family

ID=7679606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02737752A Expired - Lifetime EP1373714B1 (fr) 2001-03-29 2002-03-26 Soupape d'injection

Country Status (7)

Country Link
US (1) US7036754B2 (fr)
EP (1) EP1373714B1 (fr)
JP (1) JP2004518895A (fr)
AT (1) ATE475803T1 (fr)
DE (2) DE10139622B4 (fr)
HU (1) HUP0302417A3 (fr)
WO (1) WO2002079636A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050087624A1 (en) * 2002-05-10 2005-04-28 Siemens Aktiengesellschaft Injector for fuel injection
DE10250720A1 (de) * 2002-10-31 2004-05-13 Robert Bosch Gmbh Einspritzventil
DE102004011455A1 (de) * 2003-06-04 2004-12-30 Robert Bosch Gmbh Rohrfeder für Aktor und Verfahren zur Montage der Rohrfeder
ATE487057T1 (de) * 2004-02-25 2010-11-15 Ganser Hydromag Brennstoffeinspritzventil für verbrennungskraftmaschinen
DE102005015735A1 (de) * 2005-04-06 2006-10-12 Robert Bosch Gmbh Brennstoffeinspritzventil
CH697562B1 (de) * 2005-08-09 2008-11-28 Ganser Hydromag Brennstoffeinspritzventil.
DE102007045948B3 (de) * 2007-09-25 2008-09-25 L'orange Gmbh Montagevorrichtung für einen modular aufgebauten Injektor, sowie Montageverfahren hierzu
DE102011051903A1 (de) 2011-07-18 2012-10-31 L'orange Gmbh Kraftstoff-Einspritzinjektor
CN105563761A (zh) * 2014-10-11 2016-05-11 柳道万和(苏州)热流道系统有限公司 一种新型气缸
DE102017101999A1 (de) * 2017-02-01 2018-08-02 Firma L'orange Gmbh Kraftstoff-Einspritzinjektor für eine Brennkraftmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0921304A2 (fr) * 1997-12-06 1999-06-09 LUCAS INDUSTRIES public limited company Buse d'injection de combustible

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US3499607A (en) 1968-05-07 1970-03-10 Bendix Corp Fuel injection valve device
GB1322943A (en) 1970-08-11 1973-07-11 Barkas Werke Veb Fuel injectors for internal combustion engines
US3716922A (en) * 1970-12-28 1973-02-20 E Shaver Gauging method and apparatus for diesel injector nozzles
DE2308261A1 (de) 1973-02-20 1974-08-22 Bosch Gmbh Robert Kraftstoffeinspritzduese
FR2228160B3 (fr) 1973-05-02 1976-04-16 Atlantic Diesel As
US4413937A (en) * 1980-12-18 1983-11-08 Gutsche Guenter E Elements for a tool system
US4541206A (en) * 1983-10-17 1985-09-17 Iolab Corp. Fixture for holding an optical lens during tumbling
US4720903A (en) * 1986-12-12 1988-01-26 Sanford Landa Tool for assembly and disassembly of planetary for automatic transmission
IT220660Z2 (it) 1990-10-31 1993-10-08 Elasis Sistema Ricerca Fiat Perfezionamenti al sistema di otturatore per alta pressione in una valvola pilota di un iniettore elettromagnetico per sistemi di iniezione del combustibile di motori a combustione interna
EP0781917A1 (fr) * 1995-12-26 1997-07-02 General Motors Corporation Dispositif de retenue d'un siège de soupape d'un injecteur de combustible
US5680845A (en) * 1996-09-06 1997-10-28 Industrial Technology Research Institute Alignment device of dual-spray injectors for internal combustion engine
SE9700561D0 (sv) * 1997-02-18 1997-02-18 Sigmec Ab Insprutare för låga emissioner
JP2000087828A (ja) * 1998-09-11 2000-03-28 Honda Motor Co Ltd エンジン
DE19951014A1 (de) * 1999-07-02 2001-01-04 Bosch Gmbh Robert Brennstoffeinspritzventil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0921304A2 (fr) * 1997-12-06 1999-06-09 LUCAS INDUSTRIES public limited company Buse d'injection de combustible

Also Published As

Publication number Publication date
HUP0302417A2 (hu) 2003-10-28
JP2004518895A (ja) 2004-06-24
DE50214552D1 (de) 2010-09-09
HUP0302417A3 (en) 2007-02-28
WO2002079636A1 (fr) 2002-10-10
US7036754B2 (en) 2006-05-02
DE10139622A1 (de) 2002-10-02
US20030168527A1 (en) 2003-09-11
ATE475803T1 (de) 2010-08-15
DE10139622B4 (de) 2018-06-14
EP1373714A1 (fr) 2004-01-02

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