EP1276983B1 - Soupape servant a diriger des liquides - Google Patents

Soupape servant a diriger des liquides Download PDF

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Publication number
EP1276983B1
EP1276983B1 EP01921223A EP01921223A EP1276983B1 EP 1276983 B1 EP1276983 B1 EP 1276983B1 EP 01921223 A EP01921223 A EP 01921223A EP 01921223 A EP01921223 A EP 01921223A EP 1276983 B1 EP1276983 B1 EP 1276983B1
Authority
EP
European Patent Office
Prior art keywords
valve
actuating piston
piston
actuating
bore
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
EP01921223A
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German (de)
English (en)
Other versions
EP1276983A1 (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 EP1276983A1 publication Critical patent/EP1276983A1/fr
Application granted granted Critical
Publication of EP1276983B1 publication Critical patent/EP1276983B1/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
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M47/025—Hydraulically 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
    • 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
    • F02M2200/70—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
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions

Definitions

  • the invention is based on a valve for controlling Liquids according to the detail defined in claim 1 Sort of out.
  • the hydraulic chamber is in such a way between the two Clamped piston, that the actuating piston of the Valve member one to the gear ratio of Piston diameter makes increased stroke when the larger piston by the piezoelectric actuator to a certain distance is moved.
  • the valve member, the pistons and the piezoelectric actuator are thereby on a common axis in a row.
  • valves in particular the great length, which extends through the longitudinal direction successively arranged piston results and at low available installation space very hindering is.
  • the inventive valve for controlling fluids according to the features of claim 1 with an actuating piston, which in a blind bore the adjusting piston is arranged, and with at least one Reduction element for the realization of the translation advantageously requires only a very small Installation space.
  • the leakage from the hydraulic chamber significantly reduce, as by the solution according to the invention parallel sealing gaps between control pistons, Actuating piston and reducing much less Liquid can escape than over the inevitable larger peripheral surfaces of serially one behind the other arranged actuating and actuating piston.
  • the transmission ratio is constructive in the inventive Valve in a particularly simple manner about the area ratios between the cross-sectional area of the actuator piston on the hydraulic chamber, i. the base area of the blind bore, and the cross-sectional area, which is the cross section of the actuating piston and the cross section of the at least one Reduzierettis composed, realized.
  • the actuating piston together with the at least one reducing element for a first part length of its maximum stroke displaceable is, and that the actuating piston from reaching the stop for the at least one reducing element in the Bore the valve body a remaining stroke performs.
  • the piezoelectric Although actuator provides a large reserve of power as long as the Aktorhub is small, but that the maximum Stroke piezoelectric actuators is also small. It is with a step ratio according to the invention but advantageously possible, a great force on the valve closure member for a first part length of maximum stroke, since the gear ratio 1: 1 relative to the actuating piston. In order to can the valve closure member against a very high Print to be opened. After the reducer its Stop has reached, the actuating piston depending on the dimensions of a remaining stroke with less Overcome power.
  • valve can also be the piezoelectric actuator on to be downsized as to the execution of the required Stroke the maximum actuator power only for a small stroke is required.
  • valve in a special way as a servo valve for control a fuel injection valve for internal combustion engines, in particular a common rail injector, in which a very limited space for Is available and in which the servo valve against a high rail pressure must be opened so that a through an injection needle predetermined flow through the Valve seat of the valve closure member is made possible.
  • valve according to the invention for controlling fluids is in the drawing and will become more apparent in the following description explained.
  • the single figure shows a schematic, fragmentary Representation of an embodiment of the invention in a fuel injection valve for internal combustion engines in longitudinal section.
  • the embodiment shown in the figure shows a use of the valve according to the invention in a Fuel injection valve 1 for internal combustion engines of Motor vehicles.
  • the fuel injection valve 1 is presently designed as a common rail injector, the injection of diesel fuel over the Pressure level in a valve control chamber 12, which with a high pressure supply is connected, controlled becomes.
  • a multi-part valve member 2 via a piezoelectric actuator 3 formed as a piezoelectric Unit driven, the piezoelectric Actuator 3 on the valve control room and combustion chamber facing away Side of the valve member 2 is arranged.
  • the known per se of several layers constructed piezoelectric actuator 3 has on his the valve member 2 side facing an actuator head. 4 on and relies on the valve member facing away Side on a valve body 5 from.
  • On the actuator head 4 is via a support 6, a control piston 7 of the valve member 2 on.
  • the valve member 2 is in a longitudinal bore executed bore 8 of the Ventilkorpers. 5 axially displaceable and includes next to the actuating piston. 7 nor a valve closure member 9 actuated actuating piston 10, wherein the actuating piston 7 and the actuating piston 10 by means of a hydraulic transmission coupled together.
  • the hydraulic transmission is with a hydraulic chamber 11 formed over which the deflection of the piezoelectric Actuator 3 is transmitted.
  • the hydraulic chamber 11 is in an open in valve seat direction Blind bore 13 of the actuating piston 7 is formed in which the actuating piston 10 slidably mounted is and the hydraulic chamber 11 in the valve seat direction limited.
  • the gear ratio results thereby from the relationship between the to the hydraulic chamber 11 adjacent cross-sectional area A0 of the actuating piston 7 on the one hand and the smaller cross-sectional area A1 of the actuating piston 10 on the other.
  • Length of the bolt 14 is greater than the length of an area 10A of the actuating piston 10 with the at the compensation volume the hydraulic chamber 11 adjacent cross-sectional area A1 selected.
  • the cross section of the actuating piston 10 tapers from this area 10A against a contact surface 16 for the valve closure member 9th
  • the reducing element 14 in the valve seat direction be made a little shorter, so that a stepped translation is possible, in which the actuating piston 10 initially together with the Reduzierelement 14 for a first part length of its maximum stroke is displaceable, namely until the reducing element at which preferably divided at a dividing surface of executed valve body 5 trained stop 15th comes to the concern.
  • 1 Coupling can be a great force on the valve closure member 9 are applied, while in the subsequent sole movement of the actuating piston 10 a large residual stroke can be performed, the one stable operation of the fuel injection valve 1 ensures, on the one hand the valve position clearly and on the other a typical for common rail injectors Outflow throttle 18 can safely cavitate.
  • valve closure member 9 which in the present case with spherical caps is formed and on the valve control chamber side End of the valve member 2 is provided acts with formed on the valve body 5 valve seats 19, 20 together, the lower valve seat 20 a Spring device 21 is associated with the valve closing member 9 at discharge of the valve control chamber 12th at the upper valve seat 19 stops.
  • the valve seats 19, 20 are in a first formed in the valve body 5
  • Valve chamber 22 is formed, which with a leakage drainage channel 23 and with one to a valve system pressure chamber 24 leading equalization channel 25 a filling device 26 is connected.
  • valve closure member 9 which in an alternative Of course, also with only one valve seat can interact, separates a low pressure area 27 with a system pressure from a high pressure area 28 with a high pressure or rail pressure.
  • a second valve chamber 29 which on the one hand by the valve body 5 and on the other by a with the adjusting piston 7 and the valve body 5 connected sealing element 30 is limited wherein the sealing element 30 in the present case as a bellows-like Membrane is formed and prevents the piezoelectric actuator 3 with the in the low pressure region 27 contained fuel comes into contact.
  • the fuel injection valve 1 works in the manner described below.
  • valve closing member For fuel injection, the valve closing member must be 9 against the flow direction and thus against the Rail pressure in the high pressure area 28 are opened.
  • valve closure member 9 in a middle position placed between the two valve seats 19, 20 and then in a closed position to the lower Valve seat 20 moves, causing no more fuel the valve control chamber 12 into the first valve chamber 22 passes.
  • Valve closure member 9 When the energization of the piezoelectric actuator 3 is interrupted becomes shorter again, and that Valve closure member 9 is in the middle position between brought the two valve seats 19, 20, wherein a re-fuel injection takes place. After this Pressure reduction in the valve chamber 22 through the leakage drainage channel 23, the valve closing member 9 moves in its closed position to the upper valve seat 19, in the it is held by the spring means 21.
  • the embodiment is not a power balanced fuel injector, Of course, the invention can also be balanced with force designed valves are used.
  • the invention is not limited to fuel injectors limited, but it is suitable for everyone Valves with a piezoelectric actuator, at where a valve closure member is a high pressure area of separates a low pressure region, such as in pumps.

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)
  • Electrically Driven Valve-Operating Means (AREA)
  • Control Of Non-Electrical Variables (AREA)

Claims (11)

  1. Soupape servant à diriger des liquides et qui comprend
    une unité piézo-électrique (3) pour actionner un organe de soupape (2) pouvant coulisser dans un alésage (8) d'un corps de soupape (9) et qui présente au moins un piston de réglage (7) et au moins un piston d'actionnement (10) pour manoeuvrer un organe de fermeture de soupape (9) qui coopère avec au moins un siège de soupape (19, 20) prévu sur le corps de soupape (5) pour ouvrir et fermer la soupape (1),
    une chambre hydraulique (11) comprise entre le piston de réglage (7) et le piston d'actionnement (10) et fonctionnant en tant qu'élément de compensation de tolérance et comme élément de démultiplication hydraulique,
    caractérisée en ce que
    le piston de réglage (7) présente un alésage borgne (12) ouvert en direction du siège de soupape et dans lequel le piston d'actionnement (10) est monté coulissant et délimite la chambre hydraulique (11),
    la surface de section (A0) du piston de réglage (7) délimitant la chambre hydraulique (11) correspond au moins approximativement à la surface de section (A1) plus petite du piston d'actionnement (10) augmentée de la surface de section (A2) d'au moins un élément réducteur (14), et
    une démultiplication est prévue pour que le piston d'actionnement (10) coulisse selon au moins une partie de sa course maximale en direction du siège de soupape, tandis que l'au moins un élément réducteur (14) est en appui sur une butée (15) dans l'alésage (8).
  2. Soupape selon la revendication 1,
    caractérisée en ce qu'
    une démultiplication étagée est prévue pour que le piston d'actionnement (10), en même temps que l'au moins un élément réducteur (14) coulisse sur une partie de la longueur de sa course maximale, le piston d'actionnement (10), lorsque la butée (15) est atteinte, exécutant la course restante pour l'élément réducteur (14).
  3. Soupape selon la revendication 1 ou 2,
    caractérisée en ce que
    l'élément de réduction au nombre d'un au moins est constitué par une cheville (14) qui est insérée dans un alésage traversant (17) réalisé axialement dans le piston d'actionnement (10).
  4. Soupape selon la revendication 3,
    caractérisée en ce que
    la longueur de la cheville ou des chevilles (14) est supérieure à la longueur de la zone (10A) du piston d'actionnement (10) qui présente la surface transversale (A1).
  5. Soupape selon une des revendications 1 à 4,
    caractérisée en ce que
    la section du piston d'actionnement (10) va en se rétrécissant à la rencontre d'une portée d'appui (16) de l'organe de fermeture de soupape (9).
  6. Soupape selon une des revendications 1 à 5,
    caractérisée en ce que
    la butée (15) pour le ou les éléments réducteurs (14) est constituée par un gradin dans l'alésage (8) du corps de soupape (5), réalisé de préférence sur une surface divisant le corps de soupape.
  7. Soupape selon une des revendications 1 à 6,
    caractérisée en ce que
    le piston d'actionnement (10) confine à un premier volume de soupape (22) dans lequel l'au moins un siège (19, 20) prévu pour l'organe de fermeture de soupape (9), sépare une zone de basse pression (27) d'une zone de haute pression (28) dans la soupape (1), le piston de réglage (7) étant entouré par un second volume de soupape (29) dans une zone du corps de soupape (5) se raccordant à l'alésage (8).
  8. Soupape selon la revendication 7,
    caractérisée en ce qu'
    un dispositif de remplissage (26) est prévu pour compenser un débit de fuite sortant de la zone de basse pression (27) par prélèvement de liquide hydraulique dans la zone de haute pression (28), ce dispositif de remplissage (26) étant réalisé dans le corps de soupape (5) sous la forme d'un volume creux (31) en forme de canal qui débouche dans une chambre de pression de système (24) de la zone à basse pression (27), de préférence dans une fente (32, 33) entourant le piston de réglage (7) et/ou le piston d'actionnement (10), et qui du côté haute pression débouche de préférence avantageusement dans le premier volume de soupape (22).
  9. Soupape selon la revendication 8,
       caractérisée en ce que
    la chambre de pression du système (24) est constituée par un alésage dans la zone (7A) du piston de réglage (7) entourant le piston d'actionnement (10), cette chambre (24) débouchant dans la fente (33) entourant le piston d'actionnement (10).
  10. Soupape selon une des revendications 1 à 9,
       caractérisée en ce que
    sa configuration assure un auto-équilibrage des forces.
  11. Soupape selon une des revendications 1 à 10,
    caractérisée en ce qu'
    elle est un composant d'un injecteur de carburant pour des moteurs à combustion interne, notamment un injecteur à rampe commune (1) (common-rail).
EP01921223A 2000-04-20 2001-03-21 Soupape servant a diriger des liquides Expired - Lifetime EP1276983B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10019767 2000-04-20
DE10019767A DE10019767A1 (de) 2000-04-20 2000-04-20 Ventil zum Steuern von Flüssigkeiten
PCT/DE2001/001074 WO2001081751A1 (fr) 2000-04-20 2001-03-21 Soupape servant a diriger des liquides

Publications (2)

Publication Number Publication Date
EP1276983A1 EP1276983A1 (fr) 2003-01-22
EP1276983B1 true EP1276983B1 (fr) 2005-07-06

Family

ID=7639568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01921223A Expired - Lifetime EP1276983B1 (fr) 2000-04-20 2001-03-21 Soupape servant a diriger des liquides

Country Status (7)

Country Link
US (1) US6651950B2 (fr)
EP (1) EP1276983B1 (fr)
JP (1) JP2003532000A (fr)
AT (1) ATE299239T1 (fr)
CZ (1) CZ20014520A3 (fr)
DE (2) DE10019767A1 (fr)
WO (1) WO2001081751A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10145620B4 (de) * 2001-09-15 2006-03-02 Robert Bosch Gmbh Ventil zum Steuern von Flüssigkeiten
DE102004005456A1 (de) * 2004-02-04 2005-08-25 Robert Bosch Gmbh Kraftstoffinjektor mit direktgesteuertem Einspritzventilglied
US7100577B2 (en) * 2004-06-14 2006-09-05 Westport Research Inc. Common rail directly actuated fuel injection valve with a pressurized hydraulic transmission device and a method of operating same
DE102009027187A1 (de) * 2009-06-25 2010-12-30 Robert Bosch Gmbh Kraftstoffinjektor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001023754A1 (fr) * 1999-09-30 2001-04-05 Robert Bosch Gmbh Soupape pour commander le passage de liquides

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59010904D1 (de) * 1990-09-25 2000-05-31 Siemens Ag Anordnung für einen in Hubrichtung wirkenden adaptiven, mechanischen Toleranzausgleich für den Wegtransformator eines piezoelektrischen Aktors
DE4406522C1 (de) * 1994-02-28 1995-07-13 Siemens Ag Elektrohydraulisches Antriebselement
DE19500706C2 (de) 1995-01-12 2003-09-25 Bosch Gmbh Robert Zumeßventil zur Dosierung von Flüssigkeiten oder Gasen
DE19732802A1 (de) * 1997-07-30 1999-02-04 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE19821768C2 (de) * 1998-05-14 2000-09-07 Siemens Ag Dosiervorrichtung und Dosierverfahren
DE19946833C2 (de) * 1999-09-30 2002-02-21 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE19946838C1 (de) * 1999-09-30 2000-10-19 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE19946830A1 (de) * 1999-09-30 2001-05-03 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001023754A1 (fr) * 1999-09-30 2001-04-05 Robert Bosch Gmbh Soupape pour commander le passage de liquides

Also Published As

Publication number Publication date
EP1276983A1 (fr) 2003-01-22
CZ20014520A3 (cs) 2003-03-12
DE10019767A1 (de) 2001-10-31
JP2003532000A (ja) 2003-10-28
WO2001081751A1 (fr) 2001-11-01
US6651950B2 (en) 2003-11-25
ATE299239T1 (de) 2005-07-15
US20030098429A1 (en) 2003-05-29
DE50106694D1 (de) 2005-08-11

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