EP1636483A1 - Soupape permettant de commander le passage de liquides - Google Patents

Soupape permettant de commander le passage de liquides

Info

Publication number
EP1636483A1
EP1636483A1 EP04721823A EP04721823A EP1636483A1 EP 1636483 A1 EP1636483 A1 EP 1636483A1 EP 04721823 A EP04721823 A EP 04721823A EP 04721823 A EP04721823 A EP 04721823A EP 1636483 A1 EP1636483 A1 EP 1636483A1
Authority
EP
European Patent Office
Prior art keywords
valve
seal
actuating piston
receiving space
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.)
Granted
Application number
EP04721823A
Other languages
German (de)
English (en)
Other versions
EP1636483B1 (fr
Inventor
Siegfried Ruthardt
Bernd Streicher
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 EP1636483A1 publication Critical patent/EP1636483A1/fr
Application granted granted Critical
Publication of EP1636483B1 publication Critical patent/EP1636483B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • 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
    • F02M63/0014—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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • F02M2200/215—Piezoelectric or magnetostrictive elements being able to tilt in its housing
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
    • F02M57/024—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical with hydraulic link for varying the piston stroke

Definitions

  • the invention is based on a valve for controlling liquids in accordance with the type defined in more detail in the preamble of claim 1.
  • Such a valve is known from practice and is used, for example, as a control module of a fuel injection valve, in particular a common rail injector for a diesel internal combustion engine of a motor vehicle.
  • the valve designed as a control module comprises a housing serving as a holding body, in which a receiving space for a piezoelectric actuator unit and a hydraulic coupler module is formed.
  • the hydraulic coupler module comprises a control piston which can be actuated by means of the actuator unit, and an actuating piston which can be actuated via a hydraulic coupler is in operative connection with the actuating piston and acts on a valve closing element which interacts with at least one valve seat.
  • the valve closing member blocks a fluid flow from a valve chamber to a return flow channel.
  • pressure relief takes place in the valve space and thus in a valve control space connected to the valve space, which serves to actuate a valve control piston or a nozzle needle.
  • the valve control chamber and the valve control piston are assigned to a nozzle module of the injection valve, at the tip of which nozzles are arranged for injecting fuel into a combustion chamber of an internal combustion engine.
  • the valve control chamber encloses the free end of the valve control piston and is connected to a high-pressure connection via a fuel supply line, so that it contains fuel.
  • the position of the valve control piston can be changed and the fuel injection can thus be controlled, which takes place via the openings of the injection valve leading to the combustion chamber of the internal combustion engine.
  • the position of the valve control piston and thus that of the nozzle needle is therefore determined with the control module.
  • the valve chamber of the control module and the valve control chamber of the nozzle module are connected to each other via an outlet throttle.
  • the coupler module and the piezoelectric actuator unit are wound around in the operation of fuel. This is required for the hydraulic coupler module This is because between the actuating piston and the actuating piston there is arranged the hydraulic coupler which is designed as a hydraulic cushion and which loses hydraulic fluid or fuel when actuated by a leak and then has to be refilled, which takes place by means of the fuel surrounding the coupler module.
  • the piezoelectric actuator unit comprises a piezoelectric actuator which must not come into contact with fuel. For these reasons, the actuator unit so far has an elaborately designed sleeve, the tightness of which must also be checked before installation in the holding body.
  • valve according to the invention for controlling liquids with the features according to the preamble of claim 1, in which valve the actuating piston is guided in the receiving space by means of a seal, has the advantage that the hydraulic coupler module can be flushed with the liquid and thus a Refilling of the hydraulic coupler is ensured, but the area of the receiving space in which the piezoelectric actuator unit is arranged is sealed so that it cannot come into contact with the liquid. Encapsulation of the actuator unit is therefore no longer necessary.
  • the actuator unit can thus be designed without a metal sleeve and without a bellows or membrane for sealing. The previously required, elaborate laser welding work. Furthermore, the actuator unit no longer has to be checked for helium tightness before it is installed.
  • Return bore of the holding body is required, which leads to a return channel for the liquid leading to a storage tank.
  • the valve according to the invention can be used in particular with an injection valve which is part of a common rail injection system of a diesel engine of a motor vehicle.
  • the latter can be provided with an annular groove in which the seal is arranged.
  • the seal can be fixed to the actuating piston in such a way that it is arranged between an annular collar of the actuating piston and an adjusting disk of the actuating piston and is thus fixed in the axial direction of the actuating piston.
  • any ring seal that can accommodate the stroke of the actuating piston can be used as a seal.
  • the stroke of the actuating piston in an injection valve is, for example, a maximum of 50 ⁇ m.
  • the seal is designed as an O-ring seal or membrane or bellows seal. 5
  • the receiving space in the area of the coupler module is preferably of stepped design, with a first diameter
  • the receiving space advantageously has an insertion bevel which forms a transition between the area with the first diameter and the area with the second diameter and on which the seal slides in the direction of its installation position during assembly.
  • FIG. 1 shows an injection valve with a valve according to the invention
  • Figure 2 is an enlarged view of area II in Figure 1;
  • FIG. 3 shows a holding body of the injection valve according to FIG. 1;
  • Figure 4 shows an alternative embodiment of a valve according to the invention in a representation corresponding to Figure 2.
  • the fuel injection valve 10 which is designed for installation in an internal combustion engine of a motor vehicle (not shown here) and which is used as a common rail injector for injecting preferably diesel fuel into a combustion chamber of the internal combustion engine.
  • the fuel injection valve 10 comprises, as essential structural units, a nozzle module 11 and a valve control module 12.
  • the nozzle module 11 comprises a nozzle body 13, in which a so-called valve control piston 14 is axially displaceably guided, which forms a structural unit with a nozzle needle 15, by means of which a unit is connected to the combustion chamber of the internal combustion engine.
  • Schine leading opening or nozzle 16 of the injector 10 is controllable.
  • valve control piston 14 The free end of the valve control piston 14 is guided in a sleeve 17, on which a coil spring 18 which surrounds the valve control piston 14 is supported at one end and which is supported at its other end on a support 19 which is firmly connected to the valve control piston 14.
  • the nozzle module 11 is connected to the valve control module 12 via a union nut 20, a throttle plate 21 being arranged between the nozzle module 11 and the valve control module 12.
  • the pressure conditions in the valve control chamber 22 determine the position of the valve control piston 14 or the nozzle needle 15.
  • valve control chamber 22 is connected via an inlet duct 23 having an inlet throttle to a supply line 24 for fuel with a high-pressure accumulator, the so-called common rail, which is not shown in more detail here.
  • the fuel supply line 24 also carries force
  • valve control chamber 22 is further connected to a valve chamber 25 via a discharge channel, which cannot be seen in the drawing and which contains a discharge throttle a bypass 26 connected to the fuel supply line 24 also leads and is assigned to the valve control module 12.
  • the inlet channel 23, the outlet channel leading to the valve chamber 25 and the bypass 26 pass through the throttle plate 21.
  • a valve closing member 27 is arranged in the valve chamber 25, which is biased by means of a spiral spring 28 in the direction facing away from the throttle plate 21 and cooperates with a first valve seat 29 designed as a flat seat and a second valve seat 30 designed as a conical seat.
  • the valve control module 12 further comprises a holding body L5, in which the fuel supply line 24 is formed and which has a receiving space 32 for a piezoelectric actuator unit 33 and a coupler module 34.
  • the piezoelectric actuator unit 33 is connected to electrical control lines 35 and is operatively connected to the hydraulic coupler module 34 via an actuator head 36.
  • the hydraulic coupler module 34 comprises a first piston 37, referred to as an actuating piston, which is connected via a piston
  • actuating piston 39 having a smaller diameter than the actuating piston 37.
  • the actuating piston 37 and the actuating piston 39 are cylindrical
  • valve closing member 27 blocks a liquid flow between the valve chamber 25 and the return chamber 43.
  • a return opening 44 branches off from the area of the receiving space 32 in which the coupler module 34 is arranged and is formed in the holding body 31 and leads to an axially aligned return line 45 which is also formed in the holding body 31 , which in turn leads to a fuel storage tank, not shown here.
  • the return space 43 is thus connected to the return line 45 via the radial bore 42 and breakthroughs of a rigid tubular spring 47 (not shown here).
  • the actuating piston 37 on which the actuator head 36 engages via a bearing plate 51, is provided with an enlarged diameter in the area adjacent to the bearing plate 51.
  • the actuating piston 37 has an annular groove 49, in which an O-ring 50 serving as a seal is arranged, which lies against the wall of the receiving space 32.
  • the area of the receiving space 32 in which the actuator unit 33 is arranged is thus sealed with respect to the area of the receiving space 32 in which the coupler module 34 is arranged.
  • the actuating piston 37 makes a stroke of approximately 50 ⁇ m maximum when the inlet valve is operating. This stroke can be compensated for by the elasticity of the material from which the O-ring 50 is formed.
  • an adjusting disk 46 is arranged on the adjusting piston 37, which rests on the tubular spring 47 arranged concentrically to the sleeve 40 and by means of which the volume of the hydraulic coupler 38 arranged between the two pistons 37 and 39 can be adjusted.
  • the receiving space 32 has a larger diameter in the area in which the tubular spring 47 is arranged than in the area in which the O-ring 50 is arranged.
  • an insertion bevel 48 is arranged, which facilitates the assembly of the coupler module 34.
  • the O-ring 50 slides into its assembly position on it.
  • the shim 46 lies in the area of the insertion slope 48.
  • FIG. 4 shows an alternative embodiment of a valve control module 60 of an injection valve of the type shown in FIG. 1.
  • the valve control module 60 essentially corresponds to the valve shown in FIG.
  • valve control module differs from this by a control piston 61, which on the side facing the actuator head 36 has an annular collar 62, which is used to fix an O-ring 50, which is the area of the receiving space 32 in which the actuator unit is arranged is opposite
  • a setting disk 63 is also used to fix the O-ring 50, which is used to adjust the volume of the hydraulic coupler 38 and which rests on the tubular spring 47.
  • the shim 63 and the O-ring 50 are in the area of reduced diameter of the receiving space 32.
  • valve control module 60 corresponds to that of the valve control module according to FIG. 2.

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)

Abstract

L'invention concerne une soupape permettant de commander le passage de liquides. Cette soupape comprend un corps de base (31) comportant un espace de réception (32) dans lequel une unité d'actionnement, en particulier piézoélectrique, et un module de couplage hydraulique (34) sont disposés, ce module comprenant au moins un piston de commande (37) et au moins un piston d'actionnement (39) qui coopère avec le piston de commande (37) par l'intermédiaire d'un coupleur hydraulique (38) et qui actionne un élément obturateur (27) de la soupape, lequel coopère avec au moins un siège (29, 30) de la soupape et, en position de fermeture, empêche qu'un fluide ne s'écoule entre une chambre (25) de la soupape et un canal de retour (45). Le piston de commande (37) est guidé dans l'espace de réception (32) au moyen d'un joint (50).
EP04721823A 2003-05-20 2004-03-19 Soupape permettant de commander le passage de liquides Expired - Fee Related EP1636483B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10322672A DE10322672A1 (de) 2003-05-20 2003-05-20 Ventil zum Steuern von Flüssigkeiten
PCT/DE2004/000566 WO2004104403A1 (fr) 2003-05-20 2004-03-19 Soupape permettant de commander le passage de liquides

Publications (2)

Publication Number Publication Date
EP1636483A1 true EP1636483A1 (fr) 2006-03-22
EP1636483B1 EP1636483B1 (fr) 2007-07-18

Family

ID=33441011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04721823A Expired - Fee Related EP1636483B1 (fr) 2003-05-20 2004-03-19 Soupape permettant de commander le passage de liquides

Country Status (7)

Country Link
US (1) US20060033062A1 (fr)
EP (1) EP1636483B1 (fr)
JP (1) JP2006529012A (fr)
KR (1) KR20060006969A (fr)
CN (1) CN1791744A (fr)
DE (2) DE10322672A1 (fr)
WO (1) WO2004104403A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233100A1 (de) * 2002-07-20 2004-01-29 Robert Bosch Gmbh Piezoelektrisches Aktormodul und Verfahren zur Montage eines piezoelektrischen Aktormoduls
DE102006009070A1 (de) * 2006-02-28 2007-08-30 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006051583A1 (de) * 2006-11-02 2008-05-08 Robert Bosch Gmbh Kraftstoffinjektor mit Speichervolumensegment
DE102007002278A1 (de) * 2007-01-16 2008-07-17 Robert Bosch Gmbh Injektor zum Einspritzen von Kraftstoff
DE102007026891A1 (de) 2007-06-11 2008-12-18 Robert Bosch Gmbh Steuerventil, insbesondere für einen Kraftstoffinjektor einer Brennkraftmaschine
DE102007032219A1 (de) 2007-07-11 2009-01-15 Robert Bosch Gmbh Steuerventil, insbesondere für einen Kraftstoffinjektor einer Brennkraftmaschine
DE102007038139A1 (de) * 2007-08-13 2009-02-19 Robert Bosch Gmbh Elektrischer Stecker mit Kraftstoffrücklauf
DE102009000833A1 (de) 2009-02-13 2010-08-19 Robert Bosch Gmbh Kraftstoffinjektor mit Kopplermodul
DE102009001099A1 (de) 2009-02-24 2010-08-26 Robert Bosch Gmbh Kraftstoffeinspritzventil
DE102009001100A1 (de) 2009-02-24 2010-08-26 Robert Bosch Gmbh Kraftstoffeinspritzventil
DE102009001176A1 (de) 2009-02-26 2010-09-02 Robert Bosch Gmbh Kraftstoffeinspritzventil
DE102009027187A1 (de) 2009-06-25 2010-12-30 Robert Bosch Gmbh Kraftstoffinjektor
DE102009029412A1 (de) 2009-09-14 2011-03-17 Robert Bosch Gmbh Kraftstoffinjektor mit hydraulischer Kopplereinheit
DE102010003405A1 (de) 2010-03-29 2011-09-29 Robert Bosch Gmbh Kraftstoffinjektor mit hydraulischer Kopplereinheit
DE102010003418A1 (de) 2010-03-30 2011-10-06 Robert Bosch Gmbh Kraftstoffinjektor mit hydraulischer Kopplereinheit
DE102010029123A1 (de) * 2010-05-19 2011-11-24 Robert Bosch Gmbh Kraftstoffinjektor mit hydraulischer Kopplereinheit
JP5375762B2 (ja) * 2010-07-14 2013-12-25 株式会社デンソー 燃料噴射装置
DE102010031497A1 (de) 2010-07-19 2012-01-19 Robert Bosch Gmbh Kraftstoffinjektor mit hydraulischer Kopplereinheit
HUE025828T2 (en) * 2010-10-20 2016-05-30 Delphi Int Operations Luxembourg Sarl Improved fuel injector
DE102015226326A1 (de) 2015-12-21 2017-06-22 Robert Bosch Gmbh Hydraulische Kopplereinrichtung und Kraftstoffeinspritzventil mit einer solchen

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US4022166A (en) * 1975-04-03 1977-05-10 Teledyne Industries, Inc. Piezoelectric fuel injector valve
US4784102A (en) * 1984-12-25 1988-11-15 Nippon Soken, Inc. Fuel injector and fuel injection system
US4762300A (en) * 1985-02-19 1988-08-09 Nippondenso Co., Ltd. Control valve for controlling fluid passage
FR2586758B1 (fr) * 1985-09-04 1994-03-25 Nippon Soken Inc Injecteur de carburant et installation d'injection de carburant
JPH0656162B2 (ja) * 1987-03-03 1994-07-27 トヨタ自動車株式会社 ストロ−ク可変装置
US5129489A (en) * 1989-10-20 1992-07-14 Nippondenso Co., Ltd., 1-1 Hydraulically operated displacement transmission mechanism for shock absorber with variable damping force
JPH03163280A (ja) * 1989-11-20 1991-07-15 Nippondenso Co Ltd 積層型圧電体装置
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DE19826339A1 (de) * 1998-06-12 1999-12-16 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
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Also Published As

Publication number Publication date
US20060033062A1 (en) 2006-02-16
CN1791744A (zh) 2006-06-21
KR20060006969A (ko) 2006-01-20
WO2004104403A1 (fr) 2004-12-02
DE10322672A1 (de) 2004-12-09
EP1636483B1 (fr) 2007-07-18
JP2006529012A (ja) 2006-12-28
DE502004004377D1 (de) 2007-08-30

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