EP0907017A1 - Fluid control valve - Google Patents

Fluid control valve Download PDF

Info

Publication number
EP0907017A1
EP0907017A1 EP98111310A EP98111310A EP0907017A1 EP 0907017 A1 EP0907017 A1 EP 0907017A1 EP 98111310 A EP98111310 A EP 98111310A EP 98111310 A EP98111310 A EP 98111310A EP 0907017 A1 EP0907017 A1 EP 0907017A1
Authority
EP
European Patent Office
Prior art keywords
valve
spring
coupling space
valve according
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.)
Withdrawn
Application number
EP98111310A
Other languages
German (de)
French (fr)
Inventor
Rudolf Dr. Heinz
Dieter Kienzler
Roger Potschin
Klaus-Peter Dr. Schmoll
Friedrich Boecking
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 EP0907017A1 publication Critical patent/EP0907017A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • 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
    • F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. for compensating clearance or thermal expansion
    • F02M2200/706—Valves for filling or emptying hydraulic chamber
    • 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 valve for controlling liquids according to the preamble of claim 1.
  • a valve for controlling liquids according to the preamble of claim 1.
  • a valve is known from 0 477 400.
  • Between the two A hydraulic coupling space is clamped in the piston, such that that when the larger piston moves through the piezo actuator the actuating piston is moved a certain distance of the valve member by a ratio of the Stepped bore diameter is moved larger path.
  • the Valve member, the actuating piston, the larger in diameter Actuator piston and the piezo actuator lie on a common one Axis in a row.
  • the valve according to the invention with the characteristic features of claim 1 has the advantage that the coupling space always remains sufficiently filled and only Add coupling fluid in the direction of the coupling space can. A disadvantageous change in length of the entire device is avoided. This also applies if the piezo actuator, the valve or the housing its length e.g. when warming should change because such a change in length in the coupling space is compensated for by licking. Furthermore it is from Advantage that the device has a simple structure and works safely and reliably.
  • FIG. 1 shows a fuel injection valve in section
  • Figure 2 shows a first embodiment a filling valve
  • Figure 3 shows a second embodiment a filling valve
  • Figure 4 shows a third embodiment a filling valve.
  • the valve according to the invention is used in a Fuel injector, which is mainly in the Section is shown in Figure 1.
  • This injector has a valve housing 1, in which in a longitudinal bore 2 is a valve needle 3, which is also in here not shown, known manner by a closing spring can be preloaded in the closing direction.
  • On her one The end is the valve needle with a conical sealing surface 4 provided that on the protruding into the combustion chamber Tip 5 of the valve housing cooperates with a seat 6, from which lead out injection openings that lead to the interior of the injection valve, here the one surrounding the valve needle 3 pressurized fuel filled annulus 7 connect to the combustion chamber so as to close an injection complete when the valve needle is lifted from its seat Has.
  • the annular space is connected to a further pressure space 8, who is constantly in connection with a pressure line 10 stands over which the fuel injection valve from one High-pressure fuel accumulator 9 Fuel under injection pressure is fed.
  • This high fuel pressure also works in the pressure chamber 8, and there on a pressure shoulder 11, over the nozzle needle in a known manner under suitable conditions can be lifted off their valve seat.
  • valve needle At the other end of the valve needle is in a cylinder bore 12 out there and closes with its end face 14 a control pressure chamber 15 which via a throttle connection 16 is permanently connected to an annular space 17 which, like the pressure chamber 8 always with the high-pressure fuel reservoir communicates.
  • Axial leads from control pressure chamber 15 a throttle bore 19 from to a valve seat 20
  • Control valve 21 Control valve 21.
  • a valve member acts with the valve seat 22 of the control valve together, which is in the lifted state a connection between the control pressure chamber 15 and produces a spring chamber 18, which in turn constantly with a Relief room is connected.
  • valve member 22 loading spring in the closing direction 24 arranged that the valve member 22 on the valve seat 20th acted out so that in the normal position of the control valve closed this connection of the control pressure chamber 15 is. Since the end face of the valve needle 3 in the area of the control pressure chamber is larger than the area of the pressure shoulder 11, maintains the same fuel pressure in the control pressure chamber, which also prevails in the pressure chamber 8 now the valve needle 3 in the closed position. Is the valve member 22nd however, the pressure in the throttle connection 16 decoupled control pressure chamber 15 relieved.
  • the control valve according to the invention has one for its actuation certain piston 25 on the valve member 22 acts and by a piezo actuator shown in more detail in Figure 2 32 can be actuated.
  • the piston 25 is in a guide bore 28 tightly guided and limited with its end face 29 a coupling space 30 on its opposite Wall of an actuator piston 31 of larger diameter is completed, which is part of the piezo actuator 32 and by a spring washer arranged in the coupling space 30 27 is held in contact with the piezo actuator 32.
  • Both Pistons 25 and 31 are tightly guided in their bores.
  • Coupling space 30 is used due to the different piston surfaces the two pistons 25 and 31 as a translator room, by having a design-related small stroke of the piezo actuator piston 31 in a larger stroke of the control valve 21 actuating piston 25 translated.
  • the piezo actuator When the piezo actuator is excited the piston 25 is adjusted so that the valve member 22 lifted from its seat 20. That has a relief of Control pressure space, which in turn opens the Valve needle 3 causes.
  • At work of the valve and at the pressure ratio occur in the coupling space 30 very high Press. To keep it enclosed despite this strain Liquid does not cause loss of filling due to Leakage around the piston guide and around Filling losses due to changes in volume during temperature changes a filling valve 33 is provided to compensate quickly, which is connected to the coupling space 30.
  • such a filling valve is in the Placed embodiments according to Figures 2, 3 and 4 so that it is grown directly radially to the coupling space 30 is so low by the damage volume in the coupling space 30 to keep as possible and the rigidity of the transmission volume for the actuating movement as large as possible hold.
  • a filling valve 33 is shown in FIG has a spherical locking member 34 which immediately is loaded by a helical pressure valve spring 35.
  • Closing member 34 and valve spring 35 are in a valve chamber 36 arranged.
  • the valve spring 35 presses the closing member 34 against a valve seat 37, which is provided in the housing 26 is.
  • An inlet channel opens centrally to the valve seat 37 38, which is under low pressure.
  • a connecting hole 39 In a cylinder wall of the spring-loaded coupling space 30 is a connecting hole 39 provided, via which the filling valve 33 the coupling space 30 is connected.
  • Both the actuator piston 31 and the piston 25 are tightly guided in the housing 26, nevertheless occurs in both because of the high pressure in the Coupling space 30 a leak in the guides 40 and 41 respectively on.
  • a valve seat 43 for a spherical closing member 44 of the Filling valve 42 is also radially in a wall 45 of the spring-loaded coupling space 30 incorporated.
  • Valve spring 46 serves here a spring membrane that is edged protrudes into the coupling space 30 and anchored in the housing 26 is.
  • FIG. 4 Another optimized design of a filling valve 47 is shown in Figure 4.
  • the fill valve 47 provided with a tie rod 48 which has a head-shaped Closing member 49 comes close to the coupling space 30.
  • a valve seat 50 is arranged on a disc 51 which from a hollow clamping nut 52 on a housing shoulder 53 is held.
  • a spring plate 54 can be screwed onto the pull rod 48 arranged on which a valve spring 55 is supported, the endeavors to close the closure member 49 at its valve seat 50 hold.
  • the clamping nut 52 is screwed into the housing 26 and is of annular cylindrical design in order to have 56 in its hollow cylinder to pull the tie rod 48 and the valve spring 55.
  • a the closing member 49 receiving valve chamber 57 is via a Radial opening 58 directly with the coupling space 30 connected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

The valve incorporates a coupling chamber (30) connected to a fuel source via a filler valve (33), which opens in the direction of the chamber. The valve is radially fastened to the chamber and is a back pressure valve. The valve closure (34) is loaded by a valve spring (35) and pressed against a valve seat (37) in the housing (26).

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Ventil zum Steuern von Flüssigkeiten gemäß der Gattung des Patentanspruchs 1. Durch die EP 0 477 400 ist ein solches Ventil bekannt. Dort ist der Betätigungskolben des Ventilgliedes in einem im Durchmesser kleineren Teil einer Stufenbohrung dicht verschiebbar angeordnet, wogegen ein im Durchmesser größerer Kolben, der mit dem Piezoaktor bewegt wird, in einem im Durchmesser größeren Teil der Stufenbohrung angeordnet ist. Zwischen den beiden Kolben ist ein hydraulischer Kopplungsraum eingespannt, derart, daß, wenn der größere Kolben durch den Piezoaktor um eine bestimmte Wegstrecke bewegt wird, der Betätigungskolben des Ventilgliedes um einen um das Übersetzungsverhältnis der Stufenbohrungsdurchmesser vergrößerten Weg bewegt wird. Das Ventilglied, der Betätigungskolben, der im Durchmesser größere Aktorkolben und der Piezoaktor liegen auf einer gemeinsamen Achse hintereinander.The invention relates to a valve for controlling liquids according to the preamble of claim 1. By the EP Such a valve is known from 0 477 400. There is the actuating piston of the valve member in one in diameter smaller part of a stepped bore is arranged so that it can move tightly, whereas a piston with a larger diameter, with the piezo actuator is moved in a larger diameter Part of the stepped bore is arranged. Between the two A hydraulic coupling space is clamped in the piston, such that that when the larger piston moves through the piezo actuator the actuating piston is moved a certain distance of the valve member by a ratio of the Stepped bore diameter is moved larger path. The Valve member, the actuating piston, the larger in diameter Actuator piston and the piezo actuator lie on a common one Axis in a row.

Bei solchen Ventilen besteht das Problem, Längenänderungen des Piezoaktors, des Ventils oder des Ventilgehäuses durch den hydraulischen Kopplungsraum auszugleichen. Da der Piezoaktor zum Öffnen des Ventils im Kopplungsraum einen Druck erzeugt, führt dieser Druck auch zu einem Verlust an Kopplungsraum-Flüssigkeit. Um ein Leerpumpen des Kopplungsraums zu verhindern, ist eine Wiederbefüllung notwendig. Eine Einrichtungen, die eine solche Wiederfüllung bewirken soll, ist zwar durch den eingangs genannten Stand der Technik bereits bekannt, doch hat diese den Nachteil, daß eine ständig in den beiden möglichen Flußrichtungen offene Verbindung zwischen dem Kopplungsraum und einem Vorratsbehälter vorgesehen ist, die das Arbeitsverhalten des Piezoaktors wesentlich beeinflußt. Insbesondere führt ein somit vergrößertes Volumen zu einer die Übertragunssteifigkeit der durch den Kopplungsraumes gebildeten hydraulischen Säule reduzierende Kompressibilität.The problem with such valves is length changes of the piezo actuator, the valve or the valve housing balance the hydraulic coupling space. Because the piezo actuator a pressure to open the valve in the coupling space generated, this pressure also leads to a loss of coupling space fluid. To empty the coupling space to prevent it, refilling is necessary. A facilities which is supposed to bring about such a replenishment through the prior art mentioned at the beginning known, but this has the disadvantage that a constantly in the two possible directions of flow open connection between the coupling space and a storage container provided is, which significantly affects the working behavior of the piezo actuator. In particular, this leads to an increased volume to a the transmission stiffness through the coupling space formed hydraulic column reducing compressibility.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Ventil mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat dem gegenüber den Vorteil, daß der Kopplungsraum immer ausreichend gefüllt bleibt und nur Kopplungsflüssigkeit in Richtung Kopplungsraum nachströmen kann. Eine nachteilige Längenänderung der Gesamteinrichtung ist damit vermieden. Dies gilt auch, wenn der Piezoaktor, das Ventil oder das Gehäuse seine Länge z.B. bei Erwärmung ändern sollte, weil eine solche Längenänderung im Kopplungsraum durch Lecken kompensiert wird. Des weiteren ist es von Vorteil, daß die Einrichtung einen einfachen Aufbau hat und sicher und zuverlässig arbeitet.The valve according to the invention with the characteristic features of claim 1 has the advantage that the coupling space always remains sufficiently filled and only Add coupling fluid in the direction of the coupling space can. A disadvantageous change in length of the entire device is avoided. This also applies if the piezo actuator, the valve or the housing its length e.g. when warming should change because such a change in length in the coupling space is compensated for by licking. Furthermore it is from Advantage that the device has a simple structure and works safely and reliably.

Zeichnungdrawing

Mehrere Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung naher erläutert. Es zeigen: Figur 1 ein Kraftstoffeinspritzventil im Schnitt, Figur 2 ein erstes Ausführungsbeispiel eines Befüllungsventils, Figur 3 ein zweites Ausführungsbeispiel eines Befüllungsventils und Figur 4 ein drittes Ausführungsbeispiel eines Befüllungsventils.Several embodiments of the invention are in the Drawing shown and in the description below explained in more detail. FIG. 1 shows a fuel injection valve in section, Figure 2 shows a first embodiment a filling valve, Figure 3 shows a second embodiment a filling valve and Figure 4 shows a third embodiment a filling valve.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Das erfindungsgemäße Ventil findet Anwendung bei einem Kraftstoffeinspritzventil, das in wesentlichen Teilen im Schnitt in der Figur 1 wiedergegeben ist. Dieses Einspritzventil weist ein Ventilgehäuse 1 auf, in dem in einer Längsbohrung 2 eine Ventilnadel 3 geführt ist, die auch in hier nicht weiter gezeigter, bekannter Weise durch eine Schließfeder in Schließrichtung vorbelastet sein kann. An ihrem einen Ende ist die Ventilnadel mit einer kegelförmigen Dichtfläche 4 versehen, die an der in den Brennraum ragenden Spitze 5 des Ventilgehäuses mit einem Sitz 6 zusammen wirkt, von dem aus Einspritzöffnungen abführen, die in das Innere des Einspritzventils, hier den die Ventilnadel 3 umgebenden unter Einspritzdruck stehenden Kraftstoff gefüllten Ringraum 7 mit dem Brennraum verbinden, um so eine Einspritzung zu vollziehen, wenn die Ventilnadel von ihrem Sitz abgehoben hat. Der Ringraum ist mit einem weiteren Druckraum 8 verbunden, der ständig in Verbindung mit einer Druckleitung 10 steht, über die dem Kraftstoffeinspritzventil von einem Kraftstoffhochdruckspeicher 9 Kraftstoff unter Einspritzdruck zugeführt wird. Dieser hohe Kraftstoffdruck wirkt auch in den Druckraum 8, und dort auf eine Druckschulter 11, über die in bekannter Weise die Düsennadel bei geeigneten Bedingungen von ihrem Ventilsitz abgehoben werden kann.The valve according to the invention is used in a Fuel injector, which is mainly in the Section is shown in Figure 1. This injector has a valve housing 1, in which in a longitudinal bore 2 is a valve needle 3, which is also in here not shown, known manner by a closing spring can be preloaded in the closing direction. On her one The end is the valve needle with a conical sealing surface 4 provided that on the protruding into the combustion chamber Tip 5 of the valve housing cooperates with a seat 6, from which lead out injection openings that lead to the interior of the injection valve, here the one surrounding the valve needle 3 pressurized fuel filled annulus 7 connect to the combustion chamber so as to close an injection complete when the valve needle is lifted from its seat Has. The annular space is connected to a further pressure space 8, who is constantly in connection with a pressure line 10 stands over which the fuel injection valve from one High-pressure fuel accumulator 9 Fuel under injection pressure is fed. This high fuel pressure also works in the pressure chamber 8, and there on a pressure shoulder 11, over the nozzle needle in a known manner under suitable conditions can be lifted off their valve seat.

Am anderen Ende der Ventilnadel ist diese in einer Zylinderbohrung 12 geführt und schließt dort mit ihrer Stirnseite 14 einen Steuerdruckraum 15 ein, der über eine Drosselverbindung 16 ständig mit einem Ringraum 17 verbunden ist, der, wie auch der Druckraum 8 immer mit dem Kraftstoffhochdruckspeicher in Verbindung steht. Axial führt von Steuerdruckraum 15 eine Drosselbohrung 19 ab zu einem Ventilsitz 20 eines Steuerventils 21. Mit dem Ventilsitz wirkt ein Ventilglied 22 des Steuerventils zusammen, das in abgehobenem Zustand eine Verbindung zwischen dem Steuerdruckraum 15 und einem Federraum 18 herstellt, der wiederum ständig mit einem Entlastungsraum verbunden ist. In dem Federraum 18 ist eine das Ventilglied 22 in Schließrichtung belastende Druckfeder 24 angeordnet, die das Ventilglied 22 auf den Ventilsitz 20 hin beaufschlagt, so daß in Normalstellung des Steuerventils diese Verbindung des Steuerdruckraumes 15 verschlossen ist. Da die stirnseitige Fläche der Ventilnadel 3 im Bereich des Steuerdruckraumes größer ist als die Fläche der Druckschulter 11, hält derselbe Kraftstoffdruck im Steuerdruckraum, der auch in dem Druckraum 8 vorherrscht nun die Ventilnadel 3 in geschlossener Stellung. Ist das Ventilglied 22 jedoch abgehoben, so wird der Druck im über die Drosselverbindung 16 abgekoppelten Steuerdruckraum 15 entlastet. Bei der nun fehlenden oder reduzierten Schließkraft öffnet die Ventilnadel 3 ggfs. entgegen der Kraft einer Schließfeder schnell und kann andererseits sobald das Ventilglied 22 wieder in Schließstellung kommt, in Schließstellung gebracht werden, da sich von diesem Zeitpunkt an über die Drosselverbindung 16 der ursprüngliche hohe Kraftstoffdruck im Steuerdruckraum 15 dann schnell wieder aufbaut.At the other end of the valve needle is in a cylinder bore 12 out there and closes with its end face 14 a control pressure chamber 15 which via a throttle connection 16 is permanently connected to an annular space 17 which, like the pressure chamber 8 always with the high-pressure fuel reservoir communicates. Axial leads from control pressure chamber 15 a throttle bore 19 from to a valve seat 20 Control valve 21. A valve member acts with the valve seat 22 of the control valve together, which is in the lifted state a connection between the control pressure chamber 15 and produces a spring chamber 18, which in turn constantly with a Relief room is connected. In the spring chamber 18 is one the valve member 22 loading spring in the closing direction 24 arranged that the valve member 22 on the valve seat 20th acted out so that in the normal position of the control valve closed this connection of the control pressure chamber 15 is. Since the end face of the valve needle 3 in the area of the control pressure chamber is larger than the area of the pressure shoulder 11, maintains the same fuel pressure in the control pressure chamber, which also prevails in the pressure chamber 8 now the valve needle 3 in the closed position. Is the valve member 22nd however, the pressure in the throttle connection 16 decoupled control pressure chamber 15 relieved. At the now missing or reduced closing force opens the Valve needle 3, if necessary, against the force of a closing spring quickly and on the other hand, once the valve member 22 again comes into the closed position, brought into the closed position be, since from this point on over the throttle connection 16 the original high fuel pressure in the control pressure chamber 15 then quickly rebuilds.

Das erfindungsgemäße Steuerventil weist einen zu seiner Betätigung bestimmten Kolben 25 auf, der auf das Ventilglied 22 wirkt und durch einen in Figur 2 näher dargstellten Piezoaktor 32 betätigbar ist. Der Kolben 25 ist in einer Führungsbohrung 28 dicht geführt und begrenzt mit seiner Stirnfläche 29 einen Kopplungsraum 30, der auf seiner gegenüberliegenden Wand von einem Aktorkolben 31 größeren Durchmessers abgeschlossen ist, der Teil des Piezoaktors 32 ist und der durch eine im Kopplungsraum 30 angeordente Federscheibe 27 in Kontakt mit dem Piezoaktor 32 gehalten wird. Beide Kolben 25 und 31 sind in ihren Bohrungen dicht geführt. Der Kopplungsraum 30 dient aufgrund der unterschiedlichen Kolbenflächen der beiden Kolben 25 und 31 als Übersetzerraum, indem er einen konstruktionsbedingten kleinen Hub des Piezoaktorkolbens 31 in einen größeren Hub des das Steuerventil 21 betätigenden Kolbens 25 übersetzt. Bei Erregung des Piezoaktors wird der Kolben 25 so verstellt daß das Ventilglied 22 von seinem Sitz 20 abgehoben. Das hat eine Entlastung des Steuerdruckraumes zur Folge, was wiederum das Öffnen der Ventilnadel 3 bewirkt. Bei der Arbeit des Ventils und bei der Druckübersetzung treten im Kopplungsraum 30 sehr hohe Drücke auf. Um es trotz dieser Belastung der eingeschlossenen Flüssigkeit nicht zu einem Füllungsverlust aufgrund von Leckage entlang der Kolbenführung kommen zu lassen und um Füllungsverluste durch Volumenänderung bei Temperaturwechseln schnell auszugleichen ist ein Befüllungsventil 33 vorgesehen, das an den Kopplungsraum 30 angeschlossen ist.The control valve according to the invention has one for its actuation certain piston 25 on the valve member 22 acts and by a piezo actuator shown in more detail in Figure 2 32 can be actuated. The piston 25 is in a guide bore 28 tightly guided and limited with its end face 29 a coupling space 30 on its opposite Wall of an actuator piston 31 of larger diameter is completed, which is part of the piezo actuator 32 and by a spring washer arranged in the coupling space 30 27 is held in contact with the piezo actuator 32. Both Pistons 25 and 31 are tightly guided in their bores. Of the Coupling space 30 is used due to the different piston surfaces the two pistons 25 and 31 as a translator room, by having a design-related small stroke of the piezo actuator piston 31 in a larger stroke of the control valve 21 actuating piston 25 translated. When the piezo actuator is excited the piston 25 is adjusted so that the valve member 22 lifted from its seat 20. That has a relief of Control pressure space, which in turn opens the Valve needle 3 causes. At work of the valve and at the pressure ratio occur in the coupling space 30 very high Press. To keep it enclosed despite this strain Liquid does not cause loss of filling due to Leakage around the piston guide and around Filling losses due to changes in volume during temperature changes a filling valve 33 is provided to compensate quickly, which is connected to the coupling space 30.

Gemäß der Erfindung ist ein solches Befüllungsventil bei den Ausführungsbeispielen nach den Figuren 2, 3 und 4 so plaziert, daß es unmittelbar radial an den Kopplungsraum 30 angebaut ist, um das Schadvolumen im Kopplungsraum 30 so gering wie möglich zu halten und die Steifigkeit des Übertragungsvolumen für die Stellbewegung so groß wie möglich zu halten.According to the invention, such a filling valve is in the Placed embodiments according to Figures 2, 3 and 4 so that it is grown directly radially to the coupling space 30 is so low by the damage volume in the coupling space 30 to keep as possible and the rigidity of the transmission volume for the actuating movement as large as possible hold.

In der Figur 2 ist ein Befüllungsventil 33 dargestellt, das ein kugelförmiges Schließglied 34 hat, welches unmittelbar von einer Schraubendruck-Ventilfeder 35 belastet ist. Schließglied 34 und Ventilfeder 35 sind in einer Ventilkammer 36 angeordnet. Die Ventilfeder 35 drückt das Schließglied 34 gegen einen Ventilsitz 37, der im Gehäuse 26 vorgesehen ist. Zentrisch zum Ventilsitz 37 mündet ein Zulaufkanal 38, der unter Niederdruck steht. In einer Zylinderwand des federbestückten Kopplungsraumes 30 ist eine Verbindungsbohrung 39 vorgesehen, über die das Befüllungsventil 33 an den Kopplungsraum 30 angeschlossen ist. Sowohl der Aktorkolben 31 als auch der Kolben 25 sind im Gehäuse 26 dicht geführt, trotzdem tritt bei beiden wegen des hohen Druckes im Kopplungsraum 30 eine Leckage in den Führungen 40 bzw. 41 auf.A filling valve 33 is shown in FIG has a spherical locking member 34 which immediately is loaded by a helical pressure valve spring 35. Closing member 34 and valve spring 35 are in a valve chamber 36 arranged. The valve spring 35 presses the closing member 34 against a valve seat 37, which is provided in the housing 26 is. An inlet channel opens centrally to the valve seat 37 38, which is under low pressure. In a cylinder wall of the spring-loaded coupling space 30 is a connecting hole 39 provided, via which the filling valve 33 the coupling space 30 is connected. Both the actuator piston 31 and the piston 25 are tightly guided in the housing 26, nevertheless occurs in both because of the high pressure in the Coupling space 30 a leak in the guides 40 and 41 respectively on.

Wenn bei der Arbeit des Ventils Flüssigkeit aus dem Kopplungsraum 30 über die Führungen 40 und 41 verloren geht, sich also das Volumen des Kopplungsraumes 30 verkleinert, wird dieser Verlust über das Befüllungsventil 33 sofort ausgeglichen, indem Flüssigkeit aus dem Zulaufkanal 38 über die Ventilkammer 36 und das sich von seinem Ventilsitz 37 abhebende Ventilglied 34 nachgefüllt wird. Dies wird durch die Federscheibe 57 unterstützt, die bestrebt ist, den Kopplungsraum 30 immer so groß wie möglich zu halten, indem sie den Kolben 31 zum Piezoaktor 32 hin verstellt. Der Zulaufdruck, der Ventilsitz 37 und die Ventilfeder 35 müssen entsprechen abgestimmt werden. Das Befüllungsventil (33) ist bei dieser Ausgestaltung von den beschleunigten Bewegungen der Kolben (25, 31) d.h. von deren Beschleunigungskräften unabhängig.If liquid from the coupling space occurs when the valve is working 30 is lost via the guides 40 and 41, the volume of the coupling space 30 is reduced, this loss is immediately compensated for via the filling valve 33, by liquid from the inlet channel 38 via the Valve chamber 36 and that which stands out from its valve seat 37 Valve member 34 is refilled. This is through the Supported spring washer 57, which strives to the coupling space 30 always keep it as big as possible by the piston 31 is adjusted to the piezo actuator 32. The inlet pressure, the valve seat 37 and the valve spring 35 must correspond be coordinated. The filling valve (33) is in this configuration of the accelerated movements the piston (25, 31) i.e. of their acceleration forces independently.

Wichtig ist, daß durch die Ventilkammer 36 das Volumen des Kopplungsraumes 30 nicht wesentlich vergrößert wird. Im Hinblick darauf noch weiter optimiert ist ein Befüllungsventil 42, wie es in der Figur 3 dargestellt ist. Bei dieser Konstruktion ist die Ventilkammer 36 der Bauart nach der Figur 2 in Wegfall gekommen.It is important that the volume of the Coupling space 30 is not significantly enlarged. With regard a filling valve is further optimized for this 42, as shown in Figure 3. With this construction is the valve chamber 36 of the type shown in the figure 2 dropped out.

Ein Ventilsitz 43 für ein kugelförmiges Schließglied 44 des Befüllungsventils 42 ist radial in eine Wand 45 des ebenfalls federbestückten Kopplungsraumes 30 eingearbeitet. Als Ventilfeder 46 dient hier eine Feder-Membran, die hochkant in den Kopplungsraum 30 hineinragt und im Gehäuse 26 verankert ist.A valve seat 43 for a spherical closing member 44 of the Filling valve 42 is also radially in a wall 45 of the spring-loaded coupling space 30 incorporated. As Valve spring 46 serves here a spring membrane that is edged protrudes into the coupling space 30 and anchored in the housing 26 is.

Eine weitere optimierte Bauart eines Befüllungsventils 47 ist in der Figur 4 gezeigt. Hier ist das Befüllungsventil 47 mit einer Zugstange 48 versehen, die mit einem kopfförmigen Schließglied 49 nahe an den Kopplungsraum 30 heranreicht. Ein Ventilsitz 50 ist an einer Scheibe 51 angeordnet, die von einer hohlen Spannmutter 52 an einer Gehäuseschulter 53 festgehalten wird.Another optimized design of a filling valve 47 is shown in Figure 4. Here is the fill valve 47 provided with a tie rod 48 which has a head-shaped Closing member 49 comes close to the coupling space 30. A valve seat 50 is arranged on a disc 51 which from a hollow clamping nut 52 on a housing shoulder 53 is held.

Auf der Zugstange 48 ist ein Federteller 54 verschraubbar angeordnet, an dem sich eine Ventilfeder 55 abstützt, die bestrebt ist, das Schließglied 49 an seinem Ventilsitz 50 zu halten. Die Spannmutter 52 ist im Gehäuse 26 verschraubt und ist ringzylindrisch ausgebildet, um in ihrem Hohlzylinder 56 die Zugstange 48 und die Ventilfeder 55 aufzunehmen. Eine das Schließglied 49 aufnehmende Ventilkammer 57 ist über einen Radialdurchbruch 58 unmittelbar mit dem Kopplungsraum 30 verbunden.A spring plate 54 can be screwed onto the pull rod 48 arranged on which a valve spring 55 is supported, the endeavors to close the closure member 49 at its valve seat 50 hold. The clamping nut 52 is screwed into the housing 26 and is of annular cylindrical design in order to have 56 in its hollow cylinder to pull the tie rod 48 and the valve spring 55. A the closing member 49 receiving valve chamber 57 is via a Radial opening 58 directly with the coupling space 30 connected.

Es ist zu erkennen, daß bei dieser Bauart das durch den Anbau des Befüllungsventils 47 entstandene Schadvolumen ebenfalls sehr klein ist.It can be seen that this type of construction is due to the addition of the filling valve 47 damage volume also occurred is very small.

Claims (10)

Ventil zum Steuern von Flüssigkeiten mit einem Ventilglied (22), das einen zu seiner Betätigung bestimmten von einer Rückstellkraft beaufschlagten Kolben (25) aufweist, der mit seiner Stirnseite einen hydraulischen Kopplungsraum (30) als bewegliche Wand abschließt, der andererseits von einem Aktorkolben (31) eines Piezoaktors (32) begrenzt wird, durch dessen Arbeitshub eine Druckerhöhung im Kopplungsraum (30) erzeugbar ist, durch den der Kolben (25) gegen eine Rückstellkraft verstellbar ist, dadurch gekennzeichnet, daß der Kopplungsraum (30) über ein in Richtung Kopplungsraum öffnendes Befüllungsventil (33, 42, 47) mit einer Flüssigkeitsquelle verbindbar ist.Valve for controlling liquids with a valve member (22), the one intended for its operation has a restoring force acted upon piston (25), the front with a hydraulic coupling space (30) closes as a movable wall, which on the other hand from an actuator piston (31) of a piezo actuator (32) is limited, a pressure increase in the coupling space due to its working stroke (30) can be generated, through which the piston (25) against one Restoring force is adjustable, characterized in that the coupling space (30) via in the direction of the coupling space opening filling valve (33, 42, 47) with a liquid source is connectable. Ventil nach Anspruch 1, dadurch gekennzeichnet, daß das Befüllungsventil (33, 42, 47) unmittelbar radial an den Kopplungsraum (30) angebaut ist und als Rückschklagventil ausgebildet ist.Valve according to claim 1, characterized in that the Filling valve (33, 42, 47) immediately radially to the Coupling space (30) is attached and as a check valve is trained. Ventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein Schließglied (34, 44) des Befüllungsventils (33, 42) unmittelbar von einer Ventilfeder (35, 46) belastet ist, die das Schließglied (34, 44) gegen einen Ventilsitz (37, 43) druckt, der im Gehäuse (26) vorgesehen ist.Valve according to claim 1 or 2, characterized in that a closing member (34, 44) of the filling valve (33, 42) is loaded directly by a valve spring (35, 46) the closing member (34, 44) against a valve seat (37, 43) prints, which is provided in the housing (26). Ventil nach Anspruch 3, dadurch gekennzeichnet, daß die Ventilfeder (35) eine Schraubendruckfeder ist. Valve according to claim 3, characterized in that the Valve spring (35) is a helical compression spring. Ventil nach Anspruch 3, dadurch gekennzeichnet, daß die Ventilfeder (46) eine Feder-Membran ist.Valve according to claim 3, characterized in that the Valve spring (46) is a spring membrane. Ventil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Schließglied (34, 44) als Kugel ausgebildet ist.Valve according to one of claims 1 to 5, characterized in that that the closing member (34, 44) is designed as a ball is. Ventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Befüllungsventil (47) eine Zugstange (48) aufweist, an der eine Ventilfeder (55) angreift, die bestrebt ist, ein an der Zugstange (48) angebrachtes Schließglied (49) auf einen Ventilsitz (50) zu ziehen.Valve according to claim 1 or 2, characterized in that the filling valve (47) has a pull rod (48), to which a valve spring (55) engages, which is striving to on the pull rod (48) attached closure member (49) on a Valve seat (50). Ventil nach Anspruch 7, dadurch gekennzeichnet, daß der Ventilsitz (50) an einer Scheibe (51) angeordnet ist, die von einer hohlen Spannmutter (52) an einer Gehäuseschulter (53) festgehalten wird.Valve according to claim 7, characterized in that the Valve seat (50) on a disc (51) is arranged from a hollow clamping nut (52) on a housing shoulder (53) is recorded. Ventil nach Anspruch 8, dadurch gekennzeichnet, daß die Spannmutter (52) im Gehäuse (26) verschraubt ist und ringzylindrisch ausgebildet ist und in ihrem Hohlzylinder (56) die Zugstange (48) und die Ventilfeder (55) aufnimmt.Valve according to claim 8, characterized in that the Clamping nut (52) is screwed into the housing (26) and is cylindrical is formed and in its hollow cylinder (56) Drawbar (48) and the valve spring (55) takes. Ventil nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, daß die Vorspannung der Ventilfeder (55) durch einen auf der Zugstange (48) verschraubbaren Federteller (54) veranderbar ist.Valve according to one of claims 7 to 9, characterized in that that the bias of the valve spring (55) by a spring plate (54) screwable on the pull rod (48) is changeable.
EP98111310A 1997-10-02 1998-06-19 Fluid control valve Withdrawn EP0907017A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19743640A DE19743640A1 (en) 1997-10-02 1997-10-02 Valve for controlling liquids
DE19743640 1997-10-02

Publications (1)

Publication Number Publication Date
EP0907017A1 true EP0907017A1 (en) 1999-04-07

Family

ID=7844438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98111310A Withdrawn EP0907017A1 (en) 1997-10-02 1998-06-19 Fluid control valve

Country Status (4)

Country Link
US (1) US6155532A (en)
EP (1) EP0907017A1 (en)
JP (1) JPH11166653A (en)
DE (1) DE19743640A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10133265A1 (en) * 2001-07-09 2003-01-23 Bosch Gmbh Robert Fuel injection valve with piezoelectric or magnetostrictive actuator, has hydraulic coupling valve closure body and seat surface urged pressed together by spring
DE10246618A1 (en) * 2002-10-07 2004-04-15 L'orange Gmbh Fuel injector has control valve with piezo unit and actuator with a hydraulic converter and piston with spring supported plunger
WO2007141094A1 (en) * 2006-06-09 2007-12-13 Robert Bosch Gmbh Fuel injection device for an internal combustion engine
KR100933626B1 (en) * 2001-11-30 2009-12-24 로베르트 보쉬 게엠베하 Fuel injection valve

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19743669A1 (en) * 1997-10-02 1999-04-08 Bosch Gmbh Robert Fuel injection valve for motor vehicle IC engine
DE19952511B4 (en) * 1999-10-30 2004-09-30 Robert Bosch Gmbh Common rail injector
DE10019765B4 (en) * 2000-04-20 2004-12-09 Robert Bosch Gmbh Valve for controlling liquids
DE10019764B4 (en) * 2000-04-20 2004-09-23 Robert Bosch Gmbh Length measuring device for measuring dimensions of bodies, particularly inner- and outer diameters, used in mechanical drive- and transmission elements and in circular body, has carrier element, which is adapted to body to be measured
DE10048933A1 (en) * 2000-10-04 2002-05-02 Bosch Gmbh Robert Valve for controlling liquids
FR2815085B1 (en) 2000-10-05 2005-07-08 Denso Corp IMPROVED FUEL INJECTOR STRUCTURE TO PREVENT INJECTION OF EXCESSIVE FUEL QUANTITY
WO2002031349A1 (en) 2000-10-11 2002-04-18 Siemens Vdo Automotive Corporation Compensator assembly having a pressure responsive valve for a solid state actuator of a fuel injector
JP2002202022A (en) 2000-10-30 2002-07-19 Denso Corp Valve driving device and fuel injection valve
FR2819021B1 (en) 2000-12-28 2005-03-04 Denso Corp HYDRAULIC CONTROL VALVE AND FUEL INJECTOR USING SUCH A VALVE
DE10100390A1 (en) * 2001-01-05 2002-07-25 Bosch Gmbh Robert Injector
DE10104016A1 (en) * 2001-01-31 2002-08-01 Bosch Gmbh Robert Valve for controlling liquids
DE10140796A1 (en) 2001-08-20 2003-03-06 Bosch Gmbh Robert Fuel injector
DE10145622B4 (en) * 2001-09-15 2009-09-10 Robert Bosch Gmbh Valve for controlling fluids
DE10159749A1 (en) * 2001-12-05 2003-06-12 Bosch Gmbh Robert Fuel injection valve for an internal combustion engine comprises a pressure space which contains a hydraulic fluid and, by means of sealing units, is separated from the actuator and fuel spaces
EP1406006B1 (en) * 2002-10-04 2005-06-29 Robert Bosch Gmbh Fuel injection valve
JP4214962B2 (en) * 2004-07-08 2009-01-28 株式会社デンソー Driving force transmission device and injector
US8070132B2 (en) * 2006-06-19 2011-12-06 Norgren, Inc. Fluid control device with a non-circular flow area

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919989A (en) * 1973-05-12 1975-11-18 Cav Ltd Fuel injection pumping apparatus
US4167373A (en) * 1973-05-11 1979-09-11 C.A.V. Limited Fuel injection pumping apparatus
US5209453A (en) * 1989-11-20 1993-05-11 Nippondenso Co., Ltd. Laminated type piezoelectric apparatus
EP0816670A1 (en) * 1996-07-02 1998-01-07 Siemens Automotive Corporation Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB670344A (en) * 1949-11-30 1952-04-16 Charles Robert Archibald Grant Improvements in or relating to connections for pressure gauges
US4022166A (en) * 1975-04-03 1977-05-10 Teledyne Industries, Inc. Piezoelectric fuel injector valve
JPS62107265A (en) * 1985-11-02 1987-05-18 Nippon Soken Inc Electrostriction type oil pressure control valve
US4681135A (en) * 1986-04-18 1987-07-21 Moog, Inc. Time-delay valve
DE3936619A1 (en) * 1989-11-03 1991-05-08 Man Nutzfahrzeuge Ag METHOD FOR INJECTING A FUEL INTO THE COMBUSTION CHAMBER OF AN AIR COMPRESSING, SELF-IGNITION ENGINE, AND APPARATUS FOR CARRYING OUT THIS METHOD
ATE192263T1 (en) * 1990-09-25 2000-05-15 Siemens Ag ARRANGEMENT FOR AN ADAPTIVE, MECHANICAL TOLERANCE COMPENSATION FOR THE DISTANCE TRANSFORMER OF A PIEZOELECTRIC ACTUATOR, ACTING IN THE STROKE DIRECTION

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167373A (en) * 1973-05-11 1979-09-11 C.A.V. Limited Fuel injection pumping apparatus
US3919989A (en) * 1973-05-12 1975-11-18 Cav Ltd Fuel injection pumping apparatus
US5209453A (en) * 1989-11-20 1993-05-11 Nippondenso Co., Ltd. Laminated type piezoelectric apparatus
EP0816670A1 (en) * 1996-07-02 1998-01-07 Siemens Automotive Corporation Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10133265A1 (en) * 2001-07-09 2003-01-23 Bosch Gmbh Robert Fuel injection valve with piezoelectric or magnetostrictive actuator, has hydraulic coupling valve closure body and seat surface urged pressed together by spring
US6883725B2 (en) 2001-07-09 2005-04-26 Robert Bosch Gmbh Fuel injection valve
KR100933626B1 (en) * 2001-11-30 2009-12-24 로베르트 보쉬 게엠베하 Fuel injection valve
DE10246618A1 (en) * 2002-10-07 2004-04-15 L'orange Gmbh Fuel injector has control valve with piezo unit and actuator with a hydraulic converter and piston with spring supported plunger
DE10246618B4 (en) * 2002-10-07 2008-09-18 L'orange Gmbh Fuel injector
WO2007141094A1 (en) * 2006-06-09 2007-12-13 Robert Bosch Gmbh Fuel injection device for an internal combustion engine
CN101466944B (en) * 2006-06-09 2012-07-04 罗伯特·博世有限公司 Fuel injection device for an internal combustion engine

Also Published As

Publication number Publication date
DE19743640A1 (en) 1999-04-08
JPH11166653A (en) 1999-06-22
US6155532A (en) 2000-12-05

Similar Documents

Publication Publication Date Title
EP0909891B1 (en) Fluid control valve
EP0907017A1 (en) Fluid control valve
DE69738384T2 (en) Fuel injection valve for internal combustion engines
DE19946828C1 (en) Valve for controlling liquids
DE60025133T2 (en) Fuel injection valve
DE69911670T2 (en) Fuel injection valve
DE19946827C1 (en) Valve for controlling liquids
DE69825023T2 (en) Fuel injection valve
EP0947690B1 (en) Fluid control valve
EP1387937B1 (en) Fuel injection valve for internal combustion engines with damping chamber reducing pressure oscillations
EP0941401B1 (en) Liquid control valve
DE10139871B4 (en) Valve for controlling fluids
DE102005006378A1 (en) Fuel injection device for an internal combustion engine
DE60018240T2 (en) valve assembly
DE19732070C2 (en) Direct-injection fuel injector with solenoid valve control for a multi-cylinder internal combustion engine
DE19940293A1 (en) Fuel injector
DE60111164T2 (en) Fuel injection valve with piezoelectric actuator
EP0920583B1 (en) Valve for controlling liquids
WO2001031191A2 (en) Fuel injection valve for internal combustion engines
DE10043625C2 (en) Hydraulically translated valve
DE60106523T2 (en) Fuel injection valve device
CH648904A5 (en) Fuel injection device on an internal combustion engine
DE10147830B4 (en) fuel injector
EP0923672B1 (en) Valve for regulating liquid flow
DE19756669A1 (en) Valve for controlling liquids

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 19991007

AKX Designation fees paid

Free format text: DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20050104