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EP1252426A2 - Valve for the control of fluids - Google Patents

Valve for the control of fluids

Info

Publication number
EP1252426A2
EP1252426A2 EP01909461A EP01909461A EP1252426A2 EP 1252426 A2 EP1252426 A2 EP 1252426A2 EP 01909461 A EP01909461 A EP 01909461A EP 01909461 A EP01909461 A EP 01909461A EP 1252426 A2 EP1252426 A2 EP 1252426A2
Authority
EP
European Patent Office
Prior art keywords
valve
valve body
ball
controlling liquids
control
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
EP01909461A
Other languages
German (de)
French (fr)
Other versions
EP1252426B1 (en
Inventor
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 EP1252426A2 publication Critical patent/EP1252426A2/en
Application granted granted Critical
Publication of EP1252426B1 publication Critical patent/EP1252426B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves
    • 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
    • F02M63/0059—Arrangements of valve actuators
    • F02M63/0061—Single actuator acting on two or more valve bodies
    • 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

Definitions

  • the invention relates to a valve for controlling liquids according to the preamble of claim 1.
  • EP 0 477 400 AI describes a valve which is customary today.
  • an actuating piston of the valve member is slidably arranged in a part of the stepped bore with a small diameter in a stepped bore of the valve housing.
  • a larger piston movable by a piezo actuator is arranged in part of the stepped bore with a larger diameter.
  • a hydraulic pressure chamber filled with a pressure medium is formed between the two pistons, so that a hydraulic translation of a movement of the piezo actuator takes place. This means that when the larger piston is moved by the piezo actuator by a certain distance, the actuating piston of the valve member increases the ratio of the piston diameters
  • a hydraulically operated fuel injector with an injector housing which has a hydraulic fluid inlet and a needle control chamber.
  • a hydraulic unit inside the injector supplies fuel to the injector housing under pressure.
  • the hydraulic unit includes an electromagnetically actuated control valve for the hydraulic fluid and can open and close the hydraulic fluid inlet.
  • a needle valve element includes a hydraulic closure surface exposed to the pressure of the needle control chamber.
  • a needle control valve that uses the electromagnet is provided, which is mounted in the injector housing and connects the needle control chamber to a high-pressure fluid source or can shut it off.
  • the slow response behavior of the hydraulic fluid control valve enables direct control of the fast-responding needle valve by the only fast-acting electromagnet used.
  • an injector is known from Bosch, which is equipped with a servo 3/2-seat slide valve.
  • valve according to the invention with the characterizing features of claim 1 has the advantage that a 3/2-seat valve can be used instead of the known 3/2-seat slide valve, the seats and guides do not have to run to each other.
  • the provision of the second seat enables a hard seal against a slide with a small stroke.
  • the first valve body is designed with a socket in which the second valve body can engage. This ensures a tight interaction between the two valve bodies in a structurally simple form.
  • the second valve body is essentially designed as a ball, which can sealingly engage in the socket of the first valve body.
  • the ball is preferably formed with a cylindrical extension, which takes over the guidance of the second valve body.
  • the cylindrical extension is advantageously formed with a ring at its end region facing away from the ball.
  • a clamping element acts on the ring in such a way that the ball in the pan is pressed for a tight engagement.
  • the first and second valve bodies act as a unit and can be used in a one-piece housing.
  • the guide of the first valve body and the guide of the second valve body are separated from one another, and it is not necessary for the two guides to run relative to one another.
  • valve according to the invention is used in a fuel injection system in which the injection pump and the injection nozzle form a unit (so-called pump nozzle unit (PDE)).
  • PDE pump nozzle unit
  • the injection valve 1 consists of a decentralized pump unit, not shown, and a control unit, not shown.
  • the control unit comprises a piezo actuator, not shown, arranged in a housing, not shown, with a piston 2, which controls a control valve 4 by means of hydraulic transmission 3.
  • the control valve 4 consists of a first body 5, which has a so-called pan 6 at its lower end in the attached figure. This pan 6 is followed by the second valve body 7 in the attached figure.
  • the second valve body consists of a ball " 8, which engages tightly in the pan 6, and a cylindrical extension 9.
  • the cylindrical extension 9 is here guided separately from the first valve body 5 and has a ring 10 formed on the outer circumference of the cylindrical extension 9 at its lower end region in the attached figure.
  • a spring 11 engages the ring 10, which presses the ring 10 and thus the second valve body 7 with the ball 8 against the socket 6 of the first valve body 5.
  • control valve 4 is formed with a first seat 12 and a second seat 13, with which the first valve body 5 and the second valve body 7 come into contact.
  • valve 1 The operation of the valve 1 according to the invention is described below. If pressure is exerted on the piston 2 due to a piezo actuator (not shown) when the piezo actuator is energized, this pressure is transmitted to the first valve body 5 by means of the hydraulic translator 3 in accordance with a predetermined transmission ratio.
  • a piezo actuator not shown
  • this pressure is transmitted to the first valve body 5 by means of the hydraulic translator 3 in accordance with a predetermined transmission ratio.
  • the ball 8 of the second valve body 6 can run a maximum of one stroke H when the control valve 5 is activated or the control valve 5 is deactivated.
  • the stroke is dimensioned in the order of approximately 0.3 mm.
  • the interacting valve bodies 5, 7 each comprise a socket 6 or a ball 8 for an adequate interaction
  • other mutually coordinated geometric shapes than the socket 6 and the ball 8 are of course also conceivable.

Landscapes

  • Engineering & Computer Science (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)
  • Multiple-Way Valves (AREA)
  • Control Of Non-Electrical Variables (AREA)

Abstract

A valve for the control of fluids is disclosed, comprising a valve body (4), which is operated by a translator (3), whereby the translator (3) is operated by the travel of a piezo activator. According to the invention, the valve (1) is characterised in that the valve body (4) comprises a double seated valve, in which two separate valve bodies (5, 7) run.

Description

Ventil zum Steuern von FlüssigkeitenValve for controlling liquids
Stand der TechnikState of the art
Die Erfindung betrifft ein Ventil zum Steuern von Flüssigkeiten gemäß der Gattung des Patentanspruches 1.The invention relates to a valve for controlling liquids according to the preamble of claim 1.
In der EP 0 477 400 AI ist ein heute übliches Ventil beschrieben. Dort ist in einer Stufenbohrung des Ventilgehäuses ein Betätigungskolben des Ventilgliedes in einem Teil der Stufenbohrung mit kleinem Durchmesser verschiebbar angeordnet. Ein durch einen Piezoaktor bewegbarer größerer Kolben ist in einem Teil der Stufenbohrung mit größerem Durchmesser angeordnet. Zwischen den beiden Kolben ist ein mit einem Druckmedium gefüllter hydraulischer Druckraum ausgebildet, so daß eine hydraulische Übersetzung einer Bewegung des Piezoaktors erfolgt. Das heißt, wenn der größere Kolben durch den Piezoaktor um eine bestimmte Wegstrecke bewegt wird, macht der Betätigungskolben des Ventilgliedes einen um das Übersetzungverhältnis der Kolbendurchmesser vergrößertenEP 0 477 400 AI describes a valve which is customary today. There, an actuating piston of the valve member is slidably arranged in a part of the stepped bore with a small diameter in a stepped bore of the valve housing. A larger piston movable by a piezo actuator is arranged in part of the stepped bore with a larger diameter. A hydraulic pressure chamber filled with a pressure medium is formed between the two pistons, so that a hydraulic translation of a movement of the piezo actuator takes place. This means that when the larger piston is moved by the piezo actuator by a certain distance, the actuating piston of the valve member increases the ratio of the piston diameters
Hub, da der Kolben des Piezoaktors eine größere Fläche als der Betätigungskolben des Ventilgliedes auf eist. Dabei liegen das Ventilglied, der Betätigungskolben des Ventilgliedes, der durch den Piezoaktor bewegte Kolben und der Piezoaktor auf einer gemeinsamen Achse hintereinander. Ferner ist aus der Druckschrift US 5,738,071 ein hydraulisch betätigter Kraftstoffinjektor mit einem Injektorgehäuse bekannt, welcher einen Hydraulikfluideinlaß sowie eine Nadel-Steuerkammer aufweist. Eine hydraulische Einheit innerhalb des Injektors führt Kraftstoff dem Injektorgehäuse unter Druck zu. Die Hydraulikeinheit umfaßt ein elektromagnetisch betätigtes Steuerventil für das Hydraulikfluid und kann den Hydraulikfluideinlaß öffnen und schließen. Ein Nadelventilelement umfaßt eine dem Druck der Nadel-Steuerkammer ausgesetzte hydraulische Schließfläche. Zusätzlich ist ein den Elektromagneten einsetzendes Nadelsteuerventil vorgesehen, welches im Injektorgehäuse montiert ist und die Nadel-Steuerkammer mit einer Hochdruckfluidquelle verbindet bzw. davon absperren kann. Hierbei ermöglicht das langsame Ansprechverhalten des Hydraulikfluid-Steuerventils eine direkte Steuerung des schnell ansprechenden Nadelventils durch den einzig eingesetzten schnellwirkenden Elektromagneten.Stroke since the piston of the piezo actuator has a larger area than the actuating piston of the valve member. The valve member, the actuating piston of the valve member, the piston moved by the piezo actuator and the piezo actuator lie one behind the other on a common axis. From US 5,738,071 a hydraulically operated fuel injector with an injector housing is known, which has a hydraulic fluid inlet and a needle control chamber. A hydraulic unit inside the injector supplies fuel to the injector housing under pressure. The hydraulic unit includes an electromagnetically actuated control valve for the hydraulic fluid and can open and close the hydraulic fluid inlet. A needle valve element includes a hydraulic closure surface exposed to the pressure of the needle control chamber. In addition, a needle control valve that uses the electromagnet is provided, which is mounted in the injector housing and connects the needle control chamber to a high-pressure fluid source or can shut it off. The slow response behavior of the hydraulic fluid control valve enables direct control of the fast-responding needle valve by the only fast-acting electromagnet used.
Schließlich ist aus dem Hause Bosch ein Injektor bekannt, der mit einem Servo-3/2-Sitz-Schieber-Ventil ausgerüstet ist .Finally, an injector is known from Bosch, which is equipped with a servo 3/2-seat slide valve.
Bei diesen bekannten Systemen hat es sich als nachteilig herausgestellt, daß die Schieber eine sehr kurze Überdeckung aufweisen, so daß sie für PK -Anwendungen mit Ventilhüben um ca. 0,3mm ungeeignet sind. Anstelle der bei diesen Systemen verwendeten Sitz-Schieber-Ventilen könnten zwar bekannte Doppelsitzventile die Problematik der kurzen Überdeckung in Verbindung mit Ventilhüben um ca. 0,3mm überwinden, jedoch sind die bekannten Doppelsitzventile nicht in der Praxis einsetzbar, da durch den nötigen Kraftausgleich zwei Sitze zu zwei Führungen in zumindest einem zweigeteilten Gehäuse führen würden. Vorteile der ErfindungIn these known systems, it has been found to be disadvantageous that the slides have a very short overlap, so that they are unsuitable for PK applications with valve strokes of approximately 0.3 mm. Instead of the seat slide valves used in these systems, known double-seat valves could overcome the problem of short overlap in connection with valve strokes by approx. 0.3 mm, but the known double-seat valves cannot be used in practice because two seats are required due to the necessary force balance would lead to two guides in at least one two-part housing. Advantages of the invention
Das erfindungsgemäße Ventil mit den kennzeichnenden Merkmalen des Patentanspruches 1 hat demgegenüber den Vorteil, daß anstelle der bekannten 3/2-Sitz-Schieber- Ventile ein 3/2-Doppelsitz-Ventil einsetzbar ist, wobei die Sitze und Führungen nicht zueinander laufen müssen. Zusätzlich ist durch das Vorsehen des zweiten Sitzes eine harte Abdichtung gegenüber einem Schieber bei kleinem Hub möglich.The valve according to the invention with the characterizing features of claim 1 has the advantage that a 3/2-seat valve can be used instead of the known 3/2-seat slide valve, the seats and guides do not have to run to each other. In addition, the provision of the second seat enables a hard seal against a slide with a small stroke.
In einer besonders vorteilhaften Ausgestaltungsform ist der erste Ventilkörper mit einer Pfanne ausgebildet, in die der zweite Ventilkörper eingreifen kann. Hierdurch wird in konstruktiv einfacher Form ein dichtes Zusammenwirken zwischen den beiden Ventilkörpern gewährleistet.In a particularly advantageous embodiment, the first valve body is designed with a socket in which the second valve body can engage. This ensures a tight interaction between the two valve bodies in a structurally simple form.
Vorteilhafterweise ist der zweite Ventilkörper im wesentlichen als Kugel ausgebildet, welche in die Pfanne des ersten Ventilkörpers dichtend eingreifen kann.Advantageously, the second valve body is essentially designed as a ball, which can sealingly engage in the socket of the first valve body.
Hierbei ist bevorzugt die Kugel mit einem zylindrischen Fortsatz ausgebildet, welcher die Führung des zweiten Ventilkörpers übernimmt. Führungen von zylindrischenHere, the ball is preferably formed with a cylindrical extension, which takes over the guidance of the second valve body. Guides of cylindrical
Elementen sind sowohl bei niedrigen als auch hohen Drücken einfach erzielbar, und es kann auf bekannte, im Handel gängige Konstruktionen zurückgegriffen werden.Elements can be easily obtained both at low and high pressures, and known, commercially available designs can be used.
Vorteilhaft ist der zylindrische Fortsatz an seinem der Kugel abgewandten Endbereich mit einem Ring ausgebildet.The cylindrical extension is advantageously formed with a ring at its end region facing away from the ball.
In einer besonders vorteilhaften Ausgestaltungsform des erfindungsgemäßen Ventils zum Steuern von Flüssigkeiten greift ein Spannelement derart am Ring an, daß die Kugel in die Pfanne für einen dichten Eingriff gepreßt wird. Hierdurch wirken der erste und zweite Ventilkörper als eine Einheit und können in einem einstückigen Gehäuse eingesetzt werden. Zudem sind die Führung des ersten Ventilkörpers und die Führung des zweiten Ventilkörpers voneinander getrennt, und es ist nicht erforderlich, daß die beiden Führungen zueinander verlaufen.In a particularly advantageous embodiment of the valve according to the invention for controlling liquids, a clamping element acts on the ring in such a way that the ball in the pan is pressed for a tight engagement. As a result, the first and second valve bodies act as a unit and can be used in a one-piece housing. In addition, the guide of the first valve body and the guide of the second valve body are separated from one another, and it is not necessary for the two guides to run relative to one another.
Zeichnungdrawing
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Das Ausführungsbeispiel wird in der nachfolgenden Beschreibung näher erläutert. Die beigefügte Figur zeigt schematisch eine Ansicht eines Kraftstoffeinspritzventils gemäß einem Ausführungsbeispiel der Erfindung.In the drawing, an embodiment of the invention is shown. The exemplary embodiment is explained in more detail in the following description. The attached figure shows schematically a view of a fuel injection valve according to an embodiment of the invention.
Beschreibung des AusführungsbeispielesDescription of the embodiment
In dem in Figur 1 dargestellten Ausführungsbeispiel findet das erfindungsgemäße Ventil Anwendung in einem Kraftstoffeinspritzsystem, bei dem die Einspritzpumpe und die Einspritzdüse eine Einheit bilden (sogenannte Pumpe- Düse-Einheit (PDE) ) . In Figur 1 wurden jedoch die bekannten Bauteile des Kraftstoffeinspritzsystems weggelassen.In the exemplary embodiment shown in FIG. 1, the valve according to the invention is used in a fuel injection system in which the injection pump and the injection nozzle form a unit (so-called pump nozzle unit (PDE)). In Figure 1, however, the known components of the fuel injection system have been omitted.
Insofern ist Figur 1 lediglich auf die erfindungsgemäße Neuerung fokusiert .In this respect, Figure 1 is only focused on the innovation according to the invention.
Das Einspritzventil 1 besteht aus einer nicht dargestellten dezentralen Pumpeneinheit und einer nicht dargestellten Steuereinheit. Hierbei umfaßt die Steuereinheit einen in einem nicht dargestellten Gehäuse angeordneten nicht dargestellten Piezoaktor mit einem Kolben 2, der mittels hydraulischer Übersetzung 3 ein Steuerventil 4 ansteuert. Das Steuerventil 4 besteht aus einem ersten Körper 5, welcher an seinem in der beigefügten Figur unteren Ende eine sogenannte Pfanne 6 aufweist. An diese Pfanne 6 schließt sich in der beigefügten Figur der zweite Ventilkörper 7 an. Der zweite Ventilkörper besteht aus einer Kugel" 8, die in die Pfanne 6 dicht eingreift, sowie einem zylindrischen Fortsatz 9.The injection valve 1 consists of a decentralized pump unit, not shown, and a control unit, not shown. Here, the control unit comprises a piezo actuator, not shown, arranged in a housing, not shown, with a piston 2, which controls a control valve 4 by means of hydraulic transmission 3. The control valve 4 consists of a first body 5, which has a so-called pan 6 at its lower end in the attached figure. This pan 6 is followed by the second valve body 7 in the attached figure. The second valve body consists of a ball " 8, which engages tightly in the pan 6, and a cylindrical extension 9.
Der zylindrische Fortsatz 9 ist hierbei separat vom ersten Ventilkörper 5 geführt und weist an seinem in der beigefügten Figur unteren Endbereich einen am äußeren Umfang des zylindrischen Fortsatzes 9 ausgebildeten Ring 10 auf. An dem Ring 10 greift eine Feder 11 an, welche den Ring 10 und damit den zweiten Ventilkörper 7 mit der Kugel 8 gegen die Pfanne 6 des ersten Ventilkörpers 5 preßt.The cylindrical extension 9 is here guided separately from the first valve body 5 and has a ring 10 formed on the outer circumference of the cylindrical extension 9 at its lower end region in the attached figure. A spring 11 engages the ring 10, which presses the ring 10 and thus the second valve body 7 with the ball 8 against the socket 6 of the first valve body 5.
Schließlich ist das Steuerventil 4 mit einem ersten Sitz 12 und einem zweiten Sitz 13 ausgebildet, mit welchen jeweils der erste Ventilkörper 5 bzw. der zweite Ventilkörper 7 in Anlage gelangen.Finally, the control valve 4 is formed with a first seat 12 and a second seat 13, with which the first valve body 5 and the second valve body 7 come into contact.
Wirkungsweiseoperation
Im folgenden wird die Funktionsweise des erfindungsgemäßen Ventils 1 beschrieben. Wird aufgrund eines nicht dargestellten Piezoaktors bei Bestromung des Piezoaktors Druck auf den Kolben 2 ausgeübt, wird dieser Druck mittels des hydraulischen Übersetzers 3 entsprechend einem vorgegebenen Übersetzungsverhältnis auf den ersten Ventilkörper 5 übertragen. Hierbei ist der ersteThe operation of the valve 1 according to the invention is described below. If pressure is exerted on the piston 2 due to a piezo actuator (not shown) when the piezo actuator is energized, this pressure is transmitted to the first valve body 5 by means of the hydraulic translator 3 in accordance with a predetermined transmission ratio. Here is the first
Ventilkörper aufgrund der Kombination aus Feder 11 und zweitem Ventilkörper 7 im Ruhezustand bzw. unbestromten Zustand des Ventils 1 in den ersten Sitz 12 des Steuerventils 4 vorgespannt. Daher wird, wenn der vom hydraulischen Übersetzer 3 weitergegebene Druck die Druckkraft der Feder 11 übersteigt, der erste und zweite Ventilkörper 5, 7 in der Darstellung der beigefügten Figur nach unten bewegt bis die Kugel 8 des zweiten Ventilkörpers 7 in Anlage mit dem zweiten Ventil 13 gelangt. Gleichzeitig kann Kraftstoff vom Zulauf Z durch das Steuerventil 4 zur nicht dargestellten Düse mittels des Ablaufes A strömen.Valve body biased into the first seat 12 of the control valve 4 due to the combination of the spring 11 and the second valve body 7 in the rest state or the de-energized state of the valve 1. Therefore, when the pressure passed by the hydraulic translator 3 becomes the Pressure force of the spring 11 exceeds, the first and second valve body 5, 7 in the illustration of the attached figure moves down until the ball 8 of the second valve body 7 comes into contact with the second valve 13. At the same time, fuel can flow from the inlet Z through the control valve 4 to the nozzle (not shown) by means of the outlet A.
Wird nunmehr die Bestromung des nicht dargestellten Piezoaktors unterbrochen, werden sowohl der zweite als auch erste Ventilkörper 5, 7 durch die Feder 11 in derIf the energization of the piezo actuator, not shown, is now interrupted, both the second and the first valve bodies 5, 7 are moved by the spring 11 in the
Darstellung gemäß der beigefügten Figur nach oben gedrückt, bis der erste Ventilkörper 5 mit dem ersten Ventilsitz 12 in Eingriff gelangt. Hierdurch wird der Kraftstoffzulauf Z zum Ablauf A unterbrochen und andererseits der Lecköl-Ablauf LA geöffnet, so daß sich der im Steuerventil 4 befindliche Druck durch den Lecköl-Ablauf LA entspannen kann.Illustration according to the accompanying figure pushed up until the first valve body 5 comes into engagement with the first valve seat 12. As a result, the fuel feed Z to the drain A is interrupted and, on the other hand, the leak oil drain LA is opened, so that the pressure in the control valve 4 can be released by the leak oil drain LA.
Es ist anzumerken, daß die Kugel 8 des zweiten Ventilkörpers 6 maximal einen Hub H bei Ansteuerung des Steuerventils 5 bzw. Deaktivierung des Steuerventils 5 durchlaufen kann. Hierbei ist der Hub in einer Größenordnung von ca. 0,3mm dimensioniert .It should be noted that the ball 8 of the second valve body 6 can run a maximum of one stroke H when the control valve 5 is activated or the control valve 5 is deactivated. The stroke is dimensioned in the order of approximately 0.3 mm.
Obgleich bei obiger Beschreibung eines Ausführungsbeispieles die zusammenwirkenden Ventilkörper 5, 7 jeweils eine Pfanne 6 bzw. eine Kugel 8 für ein adäquates Zusammenwirken umfassen, sind natürlich auch andere aufeinander abgestimmte geometrische Formen als die Pfanne 6 und die Kugel 8 denkbar .Although in the above description of an exemplary embodiment the interacting valve bodies 5, 7 each comprise a socket 6 or a ball 8 for an adequate interaction, other mutually coordinated geometric shapes than the socket 6 and the ball 8 are of course also conceivable.
Die vorliegenden Erfindung kann selbstverständlich auch bei anders ausgestalteten Ventilen mit hydraulischen aber auch mechanischen Übersetzern verwendet werden. Die vorhergehende Beschreibung des Ausführungsbeispieles gemäß der vorliegenden Erfindung dient nur zu illustrativen Zwecken und nicht zur Beschränkung der Erfindung. Im Rahmen der Erfindung sind verschiedene Änderungen und Modifikationen möglich, um den Umfang der Erfindung sowie ihre Äquivalente zu verlassen. The present invention can of course also be used in valves of a different design with hydraulic but also mechanical translators. The preceding description of the exemplary embodiment according to the present invention is only for illustrative purposes and not to limit the invention. Various changes and modifications are possible within the scope of the invention in order to leave the scope of the invention and its equivalents.

Claims

Ansprüche Expectations
1. Ventil zum Steuern von Flüssigkeiten mit einem über einen Übersetzer (3) betätigbaren Ventilglied (4), wobei der Übersetzer (3) durch den Hub eines Piezoaktors gesteuert wird, dadurch gekennzeichnet, daß das Ventilglied (4) ein Doppelsitzventil aufweist, in welchem zwei getrennte Ventilkörper (5, 7) geführt sind.1. Valve for controlling liquids with a translator (3) actuatable valve member (4), the translator (3) being controlled by the stroke of a piezo actuator, characterized in that the valve member (4) has a double-seat valve, in which two separate valve bodies (5, 7) are guided.
2. Ventil zum Steuern von Flüssigkeiten nach Anspruch 1, dadurch gekennzeichnet, daß der erste Ventilkörper (5) mit einer Pfanne (6) ausgebildet ist, in die der zweite Ventilkörper (7) eingreifen kann.2. Valve for controlling liquids according to claim 1, characterized in that the first valve body (5) is formed with a pan (6) in which the second valve body (7) can engage.
3. Ventil zum Steuern von Flüssigkeiten nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der zweite Ventilkörper (7) im wesentlichen als Kugel (8) ausgebildet ist.3. Valve for controlling liquids according to claim 1 or 2, characterized in that the second valve body (7) is designed essentially as a ball (8).
4. Ventil zum Steuern von Flüssigkeiten nach Anspruch 3, dadurch gekennzeichnet, daß die Kugel (8) mit einem zylindrischen Fortsatz (9) ausgebildet ist.4. Valve for controlling liquids according to claim 3, characterized in that the ball (8) is formed with a cylindrical extension (9).
5. Ventil zum Steuern von Flüssigkeiten nach Anspruch 4, dadurch gekennzeichnet, daß der zylindrische Fortsatz (9) an seinem der Kugel abgewandten Endbereich mit einem Ring (10) ausgebildet ist. 5. Valve for controlling liquids according to claim 4, characterized in that the cylindrical extension (9) is formed at its end region facing away from the ball with a ring (10).
6. Ventil zum Steuern von Flüssigkeiten nach Anspruch 5, dadurch gekennzeichnet, daß ein Spannelement (11) derart am Ring (10) angreift, daß die Kugel (8) in die Pfanne (6) für einen dichten Eingriff vorgespannt ist. 6. Valve for controlling liquids according to claim 5, characterized in that a clamping element (11) engages on the ring (10) in such a way that the ball (8) in the pan (6) is biased for a tight engagement.
EP01909461A 2000-01-22 2001-01-13 Valve for the control of fluids Expired - Lifetime EP1252426B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10002722 2000-01-22
DE10002722A DE10002722A1 (en) 2000-01-22 2000-01-22 Valve for controlling liquids
PCT/DE2001/000121 WO2001053681A2 (en) 2000-01-22 2001-01-13 Valve for the control of fluids

Publications (2)

Publication Number Publication Date
EP1252426A2 true EP1252426A2 (en) 2002-10-30
EP1252426B1 EP1252426B1 (en) 2005-04-06

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EP01909461A Expired - Lifetime EP1252426B1 (en) 2000-01-22 2001-01-13 Valve for the control of fluids

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EP (1) EP1252426B1 (en)
JP (1) JP2003532027A (en)
AT (1) ATE292751T1 (en)
CZ (1) CZ20022527A3 (en)
DE (2) DE10002722A1 (en)
HU (1) HUP0203933A2 (en)
WO (1) WO2001053681A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10055272A1 (en) * 2000-11-08 2002-05-23 Bosch Gmbh Robert Pressure controlled injector with control valves connected in series
DE102006038862A1 (en) * 2006-08-18 2008-02-21 Scanwill Aps Pressure intensifier with double seat valve
DE102009001003B4 (en) * 2009-02-19 2017-11-30 Robert Bosch Gmbh Fuel injector
JP7033563B2 (en) * 2019-06-13 2022-03-10 Ckd株式会社 Switching valve

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Publication number Priority date Publication date Assignee Title
EP0477400B1 (en) 1990-09-25 2000-04-26 Siemens Aktiengesellschaft Device for compensating the tolerance in the lift direction of the displacement transformer of a piezoelectric actuator
US5738071A (en) 1991-05-22 1998-04-14 Wolff Controls Corporation Apparatus and method for sensing movement of fuel injector valve
DE29708369U1 (en) * 1997-05-09 1997-07-10 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Controllable injection valve for fuel injection on internal combustion engines
DE19729844A1 (en) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Fuel injector
JP2001140726A (en) * 1998-12-09 2001-05-22 Denso Corp Valve device and fuel injector using it
JP3557996B2 (en) * 1999-06-21 2004-08-25 トヨタ自動車株式会社 Fuel injection device

Non-Patent Citations (1)

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Title
See references of WO0153681A2 *

Also Published As

Publication number Publication date
DE10002722A1 (en) 2001-08-02
WO2001053681A3 (en) 2002-02-07
JP2003532027A (en) 2003-10-28
HUP0203933A2 (en) 2003-03-28
WO2001053681A2 (en) 2001-07-26
DE50105831D1 (en) 2005-05-12
EP1252426B1 (en) 2005-04-06
ATE292751T1 (en) 2005-04-15
CZ20022527A3 (en) 2003-02-12

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