EP2539554B1 - Proportional valve, in particular for a camshaft adjuster - Google Patents

Proportional valve, in particular for a camshaft adjuster Download PDF

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Publication number
EP2539554B1
EP2539554B1 EP11701505.7A EP11701505A EP2539554B1 EP 2539554 B1 EP2539554 B1 EP 2539554B1 EP 11701505 A EP11701505 A EP 11701505A EP 2539554 B1 EP2539554 B1 EP 2539554B1
Authority
EP
European Patent Office
Prior art keywords
valve
proportional valve
check valve
sleeve
guide sleeve
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.)
Not-in-force
Application number
EP11701505.7A
Other languages
German (de)
French (fr)
Other versions
EP2539554A1 (en
Inventor
Jens Hoppe
Stefan Konias
Yi Wang
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.)
Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication date
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Publication of EP2539554A1 publication Critical patent/EP2539554A1/en
Application granted granted Critical
Publication of EP2539554B1 publication Critical patent/EP2539554B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making

Definitions

  • the invention relates to a proportional valve with a piston guide sleeve and a valve piston movable in the piston guide sleeve and with a arranged in a pressure medium inlet to the proportional valve check valve and a mounting method for such a proportional valve.
  • Such a proportional valve is out of DE 10 2005 060 111 A1 known.
  • This proportional valve is designed for a camshaft adjuster for an internal combustion engine and integrated in a central screw for fastening the camshaft adjuster to a camshaft.
  • the proportional valve to a check valve, which is designed spring-disk-shaped and is arranged in an annular pressure medium inlet laterally adjacent to the proportional valve on the outer circumference of the central screw.
  • check valve is out of the EP 1 291 563 A2 known.
  • This check valve is designed for a particular designed as a cartridge valve proportional valve and integrated into this.
  • this check valve is used in the region of a pressure medium inlet in a recess provided on the inner circumference of the piston guide sleeve prior to assembly of the valve piston.
  • the assembly effort of such in the piston guide sleeve used check valve considerably.
  • the stroke of this formed as a spring ring check valve is not limited to the inside and thus the spring ring can collide with the valve piston. Such a collision can lead to failure of the proportional valve.
  • the invention is based on the object of specifying a proportional valve, in particular for a camshaft adjuster of an internal combustion engine, in which the adaptation of the non-return valve to the proportional valve is improved compared to the prior art.
  • the check valve is arranged in a ring gap surrounding the piston guide sleeve in the region of the pressure medium inlet.
  • the check valve is on the one hand integrated into the actual proportional valve, so that the check valve does not have to be installed as a separate component during assembly of the proportional valve.
  • the check valve is arranged outside the piston guide sleeve, that the check valve can not be moved radially against the valve piston.
  • the proportional valve thus formed is otherwise preferably used for camshaft adjustment of an internal combustion engine.
  • the annular gap is delimited by an encapsulation that at least partially surrounds the piston guide sleeve and a receiving sleeve that encompasses at least a portion of the encapsulation.
  • the receiving sleeve at its axial end to a portion of the annular gap forming receiving gap, in which the check valve is used.
  • This embodiment allows a particularly simple and reliable mounting of the check valve by this is introduced without the use of tools in the end-side receiving gap and then the piston guide sleeve is inserted into the receiving sleeve.
  • This refinement also reduces the machining effort on the components, in particular the piston guide sleeve.
  • the piston guide sleeve is unprocessed in the embodiment according to the invention for the formation of the annular gap.
  • the provided with the encapsulation piston guide sleeve is integrally connected to the receiving sleeve.
  • the check valve is inserted into a partial region of the annular gap forming receiving gap of the receiving sleeve, and then provided with the encapsulation piston guide sleeve inserted into the receiving sleeve and connected thereto, for example, materially.
  • a non-positive or positive connection may be provided.
  • the cohesive connection can be realized for example by ultrasonic welding or gluing.
  • a frictional connection is achieved, for example, by pressing the piston guide sleeve provided with the extrusion coating into the receiving sleeve, while a positive connection can be achieved by a snap connection.
  • the check valve is designed as a slotted spring sleeve in the axial direction, which in turn can be made in an advantageous development of a metallic material, such as sheet metal or stainless steel.
  • the encapsulation forms on its outer circumferential surface a radially acting in the open position of the check valve stop and the receiving sleeve on its inner lateral surface acting radially in the closing direction of the check valve stop.
  • the check valve In the unactuated state, the check valve is powerless or slightly biased to the inner circumferential surface of the receiving sleeve. If pressure medium fluid, in particular hydraulic fluid, flows radially from the outside into the adjustment space of the proportional valve, then the check valve is pressed by the pressure of the pressure medium fluid against the outer circumferential surface of the extrusion coating and opens the inlet. If pressure oscillations occur opposite to the flow, the check valve closes against the radial pressure medium inlet of the receiving sleeve.
  • This embodiment offers the advantage that a reliable function is ensured. In any case, it is ensured that a collision of the check valve with the valve piston is excluded.
  • the proportional valve 1 according to the invention is provided for a camshaft adjuster of an internal combustion engine.
  • the camshaft driven by the camshaft adjuster in an internal combustion engine serves to open the gas exchange valves serving for pushing out the combusted gases and sucking in the fresh gases against the force of valve springs mounted on each gas exchange valve.
  • Rigid control times for the gas exchange valves represent a compromise for the design with regard to the achievable mean pressure maximum or torque maximum and its locations in the usable speed range and the achievable power at rated speed.
  • the proportional valve 1 has according to FIG. 1 an electromagnetic drive part 2, the actuating piston 6 with a valve piston 3 (FIG. FIGS. 2, 3 . 4 ) cooperates in the proportional valve 1.
  • the actuating piston 6 of the control part 2 displaces the valve piston 3 in a piston guide sleeve 4 of the proportional valve 1 between two end positions and thereby causes a controlled adjustment of the timing on the camshaft adjuster.
  • the proportional valve 1 is in addition to the control part 2 of the piston guide sleeve 4 (see the detailed illustration FIGS. 2 to 4 ), in the range of a pressure medium inlet 10 and a working port 11b with an encapsulation 5 is provided in particular of a plastic material.
  • the valve piston 3 of the drive part 2 by means of the actuating piston 6 (FIG. FIGS. 2 and 3 ) displaceable against the force of a valve spring 7.
  • the provided with the encapsulation 5 piston guide sleeve 4 is inserted into a receiving sleeve 8 and at its end remote from the control part 2 end with this via a snap connection 9 (Fig. FIG. 2, 3 ) accurately positioned.
  • the proportional valve 1 has four hydraulic fluid connections, namely a pressure medium inlet 10 connected to a pump, two working connections 11 a, 11 b and a return connection 11 c connected to a tank, which leads through the interior of the hollow cylindrical valve piston 3.
  • the hydraulic fluid which is in particular the engine oil of the internal combustion engine
  • the proportional valve 1 and fed through corresponding passages in the receiving sleeve 8, the encapsulation 5 and depending on the position of the valve piston 3 via a control piston 12a and 12b as part of the valve piston 3 limited annulus 12 to the working ports 11 a, 11 b out.
  • a connection to the return connection 11 c can be produced via a connection opening 16 in the valve piston 3.
  • the working ports 11 a, 11 b ring filter 17 are provided. They are intended to prevent the ingress of dirt into the proportional valve 1.
  • this proportional valve 1 designed according to the invention, a defined adjustment of the camshaft with respect to a toothed-belt-operated or chain-operated drive wheel, for example, is achieved. This is achieved for example by one or more associated with the camshaft adjusting piston of the camshaft adjuster 1, the / by in opposite Verstellkolbenschreib, with the working ports 11 a, 11 b in combination are rotated by introduced hydraulic fluid relative to the drive wheel / be.
  • a check valve 13 is inserted, which in a closed position on the Receiving sleeve 8 ( Figure 2) and in an open position on the encapsulation 5 FIG. 3 ) is present.
  • the piston guide sleeve 4, the encapsulation 5 and the receiving sleeve 8 form an annular gap 14 (FIG. FIG. 4 ), in which the check valve 13 is arranged.
  • the receiving sleeve 8 has a nose 15 which cooperates with the encapsulation 5.
  • This nose 15 causes the check valve 13 can not rotate within the annular gap 14. This is a malfunction is excluded. Furthermore, it is ensured by the inventive design that the check valve 13 in the open position with the valve piston 3 can not come into contact.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Magnetically Actuated Valves (AREA)

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft ein Proportionalventil mit einer Kolbenführungshülse und einem in der Kolbenführungshülse bewegbaren Ventilkolben sowie mit einem in einem Druckmittelzulauf zu dem Proportionalventil angeordneten Rückschlagventil sowie ein Montageverfahren für ein derartiges Proportionalventil.The invention relates to a proportional valve with a piston guide sleeve and a valve piston movable in the piston guide sleeve and with a arranged in a pressure medium inlet to the proportional valve check valve and a mounting method for such a proportional valve.

Stand der TechnikState of the art

Ein derartiges Proportionalventil ist aus der DE 10 2005 060 111 A1 bekannt. Dieses Proportionalventil ist für einen Nockenwellenversteller für eine Brennkraftmaschine konzipiert und in eine Zentralschraube zur Befestigung des Nockenwellenverstellers an einer Nockenwelle integriert. Dabei weist das Proportionalventil ein Rückschlagventil auf, das federscheibenförmig ausgebildet ist und in einen ringförmigen Druckmittelzulauf seitlich neben dem Proportionalventil am Außenumfang der Zentralschraube angeordnet ist. Bei der Montage muss darauf geachtet werden, dass dieses separat zu dem Proportionalventil angeordnete Rückschlagventil verbaut ist und darüber hinaus besteht zumindest beim Einschrauben der das Proportionalventil aufnehmenden Zentralschraube in die Nockenwelle die Gefahr einer Beschädigung.Such a proportional valve is out of DE 10 2005 060 111 A1 known. This proportional valve is designed for a camshaft adjuster for an internal combustion engine and integrated in a central screw for fastening the camshaft adjuster to a camshaft. In this case, the proportional valve to a check valve, which is designed spring-disk-shaped and is arranged in an annular pressure medium inlet laterally adjacent to the proportional valve on the outer circumference of the central screw. During assembly, care must be taken that this is arranged separately to the proportional valve check valve and beyond there is at least when screwing the proportional valve receiving central bolt in the camshaft, the risk of damage.

Ein weiteres Rückschlagventil ist aus der EP 1 291 563 A2 bekannt. Dieses Rückschlagventil ist für ein insbesondere als Cartridgeventil ausgebildetes Proportionalventil konzipiert und in dieses integriert. Dabei wird dieses Rückschlagventil im Bereich eines Druckmittelzulaufs in eine am Innenumfang der Kolbenführungshülse vorgesehenen Ausnehmung vor der Montage des Ventilkolbens eingesetzt. Dabei ist der Montageaufwand eines solchen in die Kolbenführungshülse eingesetzten Rückschlagventils erheblich. Hinzu kommt, dass der Hub dieses als Federring ausgebildeten Rückschlagventils nach innen nicht begrenzt ist und der Federring folglich mit dem Ventilkolben kollidieren kann. Eine solche Kollision kann zu einem Ausfall des Proportionalventils führen.Another check valve is out of the EP 1 291 563 A2 known. This check valve is designed for a particular designed as a cartridge valve proportional valve and integrated into this. In this case, this check valve is used in the region of a pressure medium inlet in a recess provided on the inner circumference of the piston guide sleeve prior to assembly of the valve piston. In this case, the assembly effort of such in the piston guide sleeve used check valve considerably. In addition, the stroke of this formed as a spring ring check valve is not limited to the inside and thus the spring ring can collide with the valve piston. Such a collision can lead to failure of the proportional valve.

Aufgabenstellungtask

Der Erfindung liegt die Aufgabe zu Grunde, ein Proportionalventil, insbesondere für einen Nockenwellenversteller einer Brennkraftmaschine, anzugeben, bei dem die Adaptierung des Rückschlagventils an das Proportionalventil gegenüber dem Stand der Technik verbessert ist.The invention is based on the object of specifying a proportional valve, in particular for a camshaft adjuster of an internal combustion engine, in which the adaptation of the non-return valve to the proportional valve is improved compared to the prior art.

Zusammenfassung der ErfindungSummary of the invention

Diese Aufgabe wird dadurch gelöst, dass das Rückschlagventil in einem die Kolbenführungshülse im Bereich des Druckmittelzulaufs umgebenden Ringspalt angeordnet ist. Durch diese Ausgestaltung ist das Rückschlagventil einerseits in das eigentliche Proportionalventil integriert, so dass das Rückschlagventil bei der Montage des Proportionalventils nicht als separates Bauteil verbaut werden muss. Andererseits ist dadurch, dass das Rückschlagventil außerhalb der Kolbenführungshülse angeordnet ist, sichergestellt, dass das Rückschlagventil nicht radial gegen den Ventilkolben bewegt werden kann. Das so ausgebildete Proportionalventil wird im Übrigen bevorzugt zur Nockenwellenverstellung einer Brennkraftmaschine eingesetzt.This object is achieved in that the check valve is arranged in a ring gap surrounding the piston guide sleeve in the region of the pressure medium inlet. By this configuration, the check valve is on the one hand integrated into the actual proportional valve, so that the check valve does not have to be installed as a separate component during assembly of the proportional valve. On the other hand, it is ensured by the fact that the check valve is arranged outside the piston guide sleeve, that the check valve can not be moved radially against the valve piston. The proportional valve thus formed is otherwise preferably used for camshaft adjustment of an internal combustion engine.

In Weiterbildung der Erfindung ist der Ringspalt von einer die Kolbenführungshülse zumindest teilweise umgebenden Umspritzung und einer zumindest einen Teilbereich der Umspritzung umfassenden Aufnahmehülse begrenzt. Mit dieser Ausgestaltung sind mehrere Vorteile erreicht. Es ist kein zusätzlicher Montageaufwand bei der Montage des Nockenwellenverstellers nötig, wobei dadurch auch die Gefahr von Montagefehlern durch ein falsch oder überhaupt nicht montiertes zusätzliches Rückschlagventil minimiert ist. Weiterhin ist kein zusätzlicher bearbeiteter Bauraum am Zylinderkopf der Brennkraftmaschine für ein separates Rückschlagventil notwendig und es ist eine hydraulisch kurze Entfernung zum eigentlichen Nockenwellenversteller und damit eine steifere hydraulische Abstützung erreicht.In a development of the invention, the annular gap is delimited by an encapsulation that at least partially surrounds the piston guide sleeve and a receiving sleeve that encompasses at least a portion of the encapsulation. With this embodiment, several advantages are achieved. There is no additional installation effort during assembly of the camshaft adjuster necessary, thereby also the risk of assembly errors is minimized by a wrong or not at all mounted additional check valve. Furthermore, no additional machined space on the cylinder head of the engine for a separate check valve necessary and it is a short hydraulic distance to the actual camshaft adjuster and thus achieved a stiffer hydraulic support.

In Weiterbildung der Erfindung weist die Aufnahmehülse an ihrem axialen Ende einen einen Teilbereich des Ringspaltes bildenden Aufnahmespalt auf, in den das Rückschlagventil eingesetzt ist. Diese Ausgestaltung ermöglicht eine besonders einfache und zuverlässige Montage des Rückschlagventils, indem dieses ohne Anwendung von Hilfsmitteln in den endseitigen Aufnahmespalt eingeführt wird und anschließend die Kolbenführungshülse in die Aufnahmehülse eingeführt wird. Durch diese Ausgestaltung ist auch der Bearbeitungsaufwand an den Bauteilen, insbesondere der Kolbenführungshülse reduziert. Im Gegensatz zum Stand der Technik ist die Kolbenführungshülse bei der erfindungsgemäßen Ausgestaltung für die Bildung des Ringspaltes unbearbeitet.In a further development of the invention, the receiving sleeve at its axial end to a portion of the annular gap forming receiving gap, in which the check valve is used. This embodiment allows a particularly simple and reliable mounting of the check valve by this is introduced without the use of tools in the end-side receiving gap and then the piston guide sleeve is inserted into the receiving sleeve. This refinement also reduces the machining effort on the components, in particular the piston guide sleeve. In contrast to the prior art, the piston guide sleeve is unprocessed in the embodiment according to the invention for the formation of the annular gap.

In weiterer Ausgestaltung der Erfindung ist die mit der Umspritzung versehene Kolbenführungshülse stoffschlüssig mit der Aufnahmehülse verbunden. Dabei wird gemäß einem erfindungsgemäßen Montageverfahren das Rückschlagventil in einen einen Teilbereich des Ringspalts bildenden Aufnahmespalt der Aufnahmehülse eingesetzt und anschließend die mit der Umspritzung versehene Kolbenführungshülse in die Aufnahmehülse eingeführt und mit dieser beispielsweise stoffschlüssig verbunden. Alternativ dazu kann eine kraft- oder formschlüssige Verbindung vorgesehen sein. Die stoffschlüssige Verbindung kann beispielsweise durch Ultraschallschweißen oder Kleben realisiert sein. Eine kraftschlüssige Verbindung wird beispielsweise durch ein Einpressen der mit der Umspritzung versehenen Kolbenführungshülse in die Aufnahmehülse erreicht, während eine formschlüssige Verbindung durch eine Schnappverbindung realisiert werden kann. Alle diese Ausgestaltungen bieten den Vorteil, dass ein äußerst funktionales Proportionalventil für einen Nockenwellenversteller bereitgestellt ist.In a further embodiment of the invention, the provided with the encapsulation piston guide sleeve is integrally connected to the receiving sleeve. In this case, according to an assembly method according to the invention, the check valve is inserted into a partial region of the annular gap forming receiving gap of the receiving sleeve, and then provided with the encapsulation piston guide sleeve inserted into the receiving sleeve and connected thereto, for example, materially. Alternatively, a non-positive or positive connection may be provided. The cohesive connection can be realized for example by ultrasonic welding or gluing. A frictional connection is achieved, for example, by pressing the piston guide sleeve provided with the extrusion coating into the receiving sleeve, while a positive connection can be achieved by a snap connection. All of these embodiments offer the advantage of providing a highly functional proportional valve for a phaser.

In Weiterbildung der Erfindung ist das Rückschlagventil als in axialer Richtung geschlitzte Federhülse ausgebildet, wodurch es wiederum in vorteilhafter Weiterbildung aus einem metallischen Werkstoff, wie beispielsweise Blech oder Edelstahl gefertigt sein kann.In a further development of the invention, the check valve is designed as a slotted spring sleeve in the axial direction, which in turn can be made in an advantageous development of a metallic material, such as sheet metal or stainless steel.

In weiterer Ausgestaltung bildet die Umspritzung an ihrer Außenmantelfläche einen radial in Öffnungsstellung des Rückschlagventils wirkenden Anschlag und die Aufnahmehülse an ihrer Innenmantelfläche einen radial in Schließrichtung des Rückschlagventils wirkenden Anschlag. Im unbetätigten Zustand liegt das Rückschlagventil kraftlos oder leicht vorgespannt an der Innenmantelfläche der Aufnahmehülse an. Strömt Druckmittelfluid, insbesondere Hydraulikfluid, von außen radial in den Verstellraum des Proportionalventils, so wird das Rückschlagventil durch den Druck des Druckmittelfluids gegen die die Außenmantelfläche der Umspritzung gedrückt und öffnet den Zulauf. Treten Druckschwingungen entgegengesetzt der Strömung auf, so schließt das Rückschlagventil gegen den radialen Druckmittelzulauf der Aufnahmehülse. Diese Ausgestaltung bietet den Vorteil, dass eine zuverlässige Funktion sichergestellt ist. In jedem Fall ist so sichergestellt, dass eine Kollision des Rückschlagventils mit dem Ventilkolben ausgeschlossen ist.In a further embodiment, the encapsulation forms on its outer circumferential surface a radially acting in the open position of the check valve stop and the receiving sleeve on its inner lateral surface acting radially in the closing direction of the check valve stop. In the unactuated state, the check valve is powerless or slightly biased to the inner circumferential surface of the receiving sleeve. If pressure medium fluid, in particular hydraulic fluid, flows radially from the outside into the adjustment space of the proportional valve, then the check valve is pressed by the pressure of the pressure medium fluid against the outer circumferential surface of the extrusion coating and opens the inlet. If pressure oscillations occur opposite to the flow, the check valve closes against the radial pressure medium inlet of the receiving sleeve. This embodiment offers the advantage that a reliable function is ensured. In any case, it is ensured that a collision of the check valve with the valve piston is excluded.

Ausführungsbeispielembodiment Kurze Beschreibung der ZeichnungShort description of the drawing

Weitere, vorteilhafte Ausgestaltungen der Erfindung sind der Zeichnungsbeschreibung zu entnehmen, in der ein in den Figuren dargestelltes Ausführungsbeispiel der Erfindung näher beschrieben ist.Further, advantageous embodiments of the invention are described in the drawings, in which an illustrated in the figures embodiment of the invention is described in more detail.

Es zeigen:

Fig.1
eine perspektivische Gesamtansicht des gesamten Proportionalventils für den Nockenwellenversteller,
Fig.2
einen Längsschnitt durch das Proportionalventil mit dem Rückschlagventil in einer geschlossenen Position,
Fig.3
einen Längsschnitt durch das Proportionalventil mit dem Rückschlagventil in einer offenen Position und
Fig.4
einen Querschnitt durch das Proportionalventil mit dem Rückschlagventil in einer geschlossenen Position.
Show it:
Fig.1
an overall perspective view of the entire proportional valve for the phaser,
Fig.2
a longitudinal section through the proportional valve with the check valve in a closed position,
Figure 3
a longitudinal section through the proportional valve with the check valve in an open position and
Figure 4
a cross section through the proportional valve with the check valve in a closed position.

Ausführliche Beschreibung der ErfindungDetailed description of the invention

Das erfindungsgemäße Proportionalventil 1 ist für einen Nockenwellenversteller einer Brennkraftmaschine vorgesehen. Dabei dient die über den Nockenwellenversteller angetriebene Nockenwelle bei einer Brennkraftmaschine dazu, die für das Ausschieben der verbrannten Gase und das Ansaugen der Frischgase dienenden Gaswechselventile entgegen der Kraft von an jedem Gaswechselventil verbauter Ventilfedern zu öffnen. Starre Steuerzeiten für die Gaswechselventile stellen einen Kompromiss für die Auslegung hinsichtlich des erreichbaren Mitteldruckmaximums bzw. Drehmomentmaximums und dessen Lagen im nutzbaren Drehzahlband sowie der erreichbaren Leistung bei Nenndrehzahl dar. Durch einen Nockenwellenversteller kann entsprechend dem jeweiligen Betriebszustand eine optimale Anpassung der Steuerzeiten der Gaswechselventile erreicht werden.The proportional valve 1 according to the invention is provided for a camshaft adjuster of an internal combustion engine. In this context, the camshaft driven by the camshaft adjuster in an internal combustion engine serves to open the gas exchange valves serving for pushing out the combusted gases and sucking in the fresh gases against the force of valve springs mounted on each gas exchange valve. Rigid control times for the gas exchange valves represent a compromise for the design with regard to the achievable mean pressure maximum or torque maximum and its locations in the usable speed range and the achievable power at rated speed. By a camshaft adjuster can be achieved according to the respective operating condition, an optimal adjustment of the timing of the gas exchange valves.

Das Proportionalventil 1 weist gemäß Figur 1 ein elektromagnetisches Ansteuerteil 2 auf, dessen Betätigungskolben 6 mit einem Ventilkolben 3 (Figuren 2, 3, 4) in dem Proportionalventil 1 zusammenwirkt. Der Betätigungskolben 6 des Ansteuerteils 2 verschiebt dabei den Ventilkolben 3 in einer Kolbenführungshülse 4 des Proportionalventils 1 zwischen zwei Endstellungen und bewirkt dadurch eine geregelte Verstellung der Steuerzeiten am Nockenwellenversteller. Das Proportionalventil 1 besteht neben dem Ansteuerteil 2 aus der Kolbenführungshülse 4 (siehe zur Detaildarstellung Figuren 2 bis 4), die im Bereich eines Druckmittelzulaufs 10 und eines Arbeitsanschlusses 11b mit einer Umspritzung 5 insbesondere aus einem Kunststoffwerkstoff versehen ist. In der Kolbenführungshülse 4 ist der Ventilkolben 3 von dem Ansteuerteil 2 mittels des Betätigungskolbens 6 (Figuren 2 und 3) gegen die Kraft einer Ventilfeder 7 verschiebbar.The proportional valve 1 has according to FIG. 1 an electromagnetic drive part 2, the actuating piston 6 with a valve piston 3 (FIG. FIGS. 2, 3 . 4 ) cooperates in the proportional valve 1. The actuating piston 6 of the control part 2 displaces the valve piston 3 in a piston guide sleeve 4 of the proportional valve 1 between two end positions and thereby causes a controlled adjustment of the timing on the camshaft adjuster. The proportional valve 1 is in addition to the control part 2 of the piston guide sleeve 4 (see the detailed illustration FIGS. 2 to 4 ), in the range of a pressure medium inlet 10 and a working port 11b with an encapsulation 5 is provided in particular of a plastic material. In the piston guide sleeve 4, the valve piston 3 of the drive part 2 by means of the actuating piston 6 (FIG. FIGS. 2 and 3 ) displaceable against the force of a valve spring 7.

Die mit der Umspritzung 5 versehene Kolbenführungshülse 4 ist in eine Aufnahmehülse 8 eingesetzt und an ihrem vom Ansteuerteil 2 abgewandten Ende mit dieser über eine Schnappverbindung 9 (Figur 2, 3) genau positioniert festgelegt. Das Proportionalventil 1 weist vier Hydraulikfluidanschlüsse auf, nämlich einen mit einer Pumpe verbundenen Druckmittelzulauf 10, zwei Arbeitsanschlüsse 11a, 11b und einem mit einem Tank verbundenen Rücklaufanschluss 11c, der durch das Innere des hohlzylindrischen Ventilkolbens 3 führt.The provided with the encapsulation 5 piston guide sleeve 4 is inserted into a receiving sleeve 8 and at its end remote from the control part 2 end with this via a snap connection 9 (Fig. FIG. 2, 3 ) accurately positioned. The proportional valve 1 has four hydraulic fluid connections, namely a pressure medium inlet 10 connected to a pump, two working connections 11 a, 11 b and a return connection 11 c connected to a tank, which leads through the interior of the hollow cylindrical valve piston 3.

Über den Druckmittelzulauf 10 wird das Hydraulikfluid, das insbesondere das Motoröl der Brennkraftmaschine ist, dem Proportionalventil 1 zugeführt und durch entsprechende Durchtritte in der Aufnahmehülse 8, der Umspritzung 5 und je nach Stellung des Ventilkolbens 3 über einen von Steuerkolben 12a und 12b als Teil des Ventilkolbens 3 begrenzten Ringraums 12 zu den Arbeitsanschlüssen 11a, 11b geführt.About the pressure medium inlet 10, the hydraulic fluid, which is in particular the engine oil of the internal combustion engine, the proportional valve 1 and fed through corresponding passages in the receiving sleeve 8, the encapsulation 5 and depending on the position of the valve piston 3 via a control piston 12a and 12b as part of the valve piston 3 limited annulus 12 to the working ports 11 a, 11 b out.

Vom Arbeitsanschluss 11a ist eine Verbindung zum Rücklaufanschluss 11c über eine Verbindungsöffnung 16 im Ventilkolben 3 herstellbar. An dem Druckmittelzulauf 10, sowie den Arbeitsanschlüssen 11a, 11b sind Ringfilter 17 vorgesehen. Sie sollen das Eindringen von Schmutz in das Proportionalventil 1 verhindern.From the working connection 11 a, a connection to the return connection 11 c can be produced via a connection opening 16 in the valve piston 3. At the pressure medium inlet 10, and the working ports 11 a, 11 b ring filter 17 are provided. They are intended to prevent the ingress of dirt into the proportional valve 1.

Durch dieses erfindungsgemäß ausgestaltete Proportionalventil 1 wird eine definierte Verstellung der Nockenwelle gegenüber einem beispielsweise zahnriemenbetätigten oder kettenbetätigten Antriebsrad erreicht. Dies wird beispielsweise durch einen oder mehrere mit der Nockenwelle verbundenen Verstellkolben des Nockenwellenverstellers 1 erreicht, der/die durch in gegenüberliegende Verstellkolbenräume, die mit den Arbeitsanschlüssen 11a, 11b in Verbindung stehen, durch eingeführtes Hydraulikfluid relativ zu dem Antriebsrad verdreht wird/werden.By means of this proportional valve 1 designed according to the invention, a defined adjustment of the camshaft with respect to a toothed-belt-operated or chain-operated drive wheel, for example, is achieved. This is achieved for example by one or more associated with the camshaft adjusting piston of the camshaft adjuster 1, the / by in opposite Verstellkolbenräume, with the working ports 11 a, 11 b in combination are rotated by introduced hydraulic fluid relative to the drive wheel / be.

Um ein Rückströmen des im Ringraum 12 befindlichen Motoröls in den Hydraulikfluidzugang 10 zu verhindern, was durch die an der Nockenwelle und somit an den Verstellkolben des Nockenwellenverstellers wirkenden Wechselmomenten geschehen kann, ist in den Hydraulikfluidzugang 10 ein Rückschlagventil 13 eingesetzt, das in einer Schließstellung an der Aufnahmehülse 8 (Figur 2) und in einer Offenstellung an der Umspritzung 5 (Figur 3) anliegt. Dabei bilden die Kolbenführungshülse 4, die Umspritzung 5 und die Aufnahmehülse 8 einen Ringspalt 14 (Figur 4), in dem das Rückschlagventil 13 angeordnet ist. Um das als axial geschlitzte Federhülse ausgebildete Rückschlagventil 13 (Reedventil) im Ringspalt 14 zuverlässig zu positionieren, weist die Aufnahmehülse 8 eine Nase 15 auf, die mit der Umspritzung 5 zusammenwirkt. Diese Nase 15 bewirkt, dass das Rückschlagventil 13 sich innerhalb des Ringspalts 14 nicht verdrehen kann. Dadurch ist eine Fehlfunktion ausgeschlossen ist. Weiterhin ist durch die erfindungsgemäße Ausgestaltung sichergestellt, dass das Rückschlagventil 13 in der Offenstellung mit dem Ventilkolben 3 nicht in Kontakt kommen kann.In order to prevent backflow of the motor oil located in the annular space 12 in the hydraulic fluid access 10, which can be done by acting on the camshaft and thus to the adjusting piston of the camshaft adjuster alternating moments, in the hydraulic fluid access 10, a check valve 13 is inserted, which in a closed position on the Receiving sleeve 8 (Figure 2) and in an open position on the encapsulation 5 FIG. 3 ) is present. The piston guide sleeve 4, the encapsulation 5 and the receiving sleeve 8 form an annular gap 14 (FIG. FIG. 4 ), in which the check valve 13 is arranged. In order to reliably position the non-return valve 13 (reed valve) designed as an axially slotted spring sleeve in the annular gap 14, the receiving sleeve 8 has a nose 15 which cooperates with the encapsulation 5. This nose 15 causes the check valve 13 can not rotate within the annular gap 14. This is a malfunction is excluded. Furthermore, it is ensured by the inventive design that the check valve 13 in the open position with the valve piston 3 can not come into contact.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Proportionalventilproportional valve
22
Ansteuerteilactivating part
33
Ventilkolbenplunger
44
KolbenführungshülsePiston sleeve
55
Umspritzungencapsulation
66
Betätigungskolbenactuating piston
77
Ventilfedervalve spring
88th
Aufnahmehülsereceiving sleeve
99
Schnappverbindungsnap
1010
DruckmittelzulaufPressure inflow
11a, 11b11a, 11b
Arbeitsanschlussworking port
11c11c
RücklaufanschlussReturn connection
1212
Ringraumannulus
12a, 12b12a, 12b
Steuerkolbenspool
1313
Rückschlagventilcheck valve
1414
Ringspaltannular gap
1515
Nasenose
1616
Verbindungsöffnungconnecting opening
1717
Ringfilterring filter

Claims (7)

  1. Proportional valve (1) having a piston guide sleeve (4) and a valve piston (3) which can be moved in the piston guide sleeve (4), and having a check valve (13) which is arranged in a pressure medium feed line (10) to the proportional valve (1), the check valve (13) being arranged in an annular gap (14) which surrounds the piston guide sleeve (4) in the region of the pressure medium feed line (10), characterized in that the annular gap (14) is delimited by an encapsulation (5), which surrounds the piston guide sleeve (4) at least partially, and a receiving sleeve (8) which covers at least one part region of the encapsulation (5), the receiving sleeve (8) having, at its axial end, a receiving gap which forms a part region of the annular gap (14) and into which the check valve (13) is inserted.
  2. Proportional valve (1) according to Claim 1, characterized in that the piston guide sleeve (4) which is provided with the encapsulation (5) is connected to the receiving sleeve (8) in an integrally joined manner.
  3. Proportional valve (1) according to Claim 1, characterized in that the piston guide sleeve (4) which is provided with the encapsulation (5) is connected to the receiving sleeve (8) in a non-positive or positively locking manner.
  4. Proportional valve (1) according to one of the preceding claims, characterized in that the check valve (13) is configured as a spring sleeve which is slotted in the axial direction.
  5. Proportional valve (1) according to one of the preceding claims, characterized in that the check valve (13) is manufactured from a metallic material.
  6. Proportional valve (1) according to one of the preceding claims, characterized in that, on its outer circumferential face, the encapsulation (5) forms a stop which acts radially in the opening direction of the check valve (13).
  7. Proportional valve (1) according to one of the preceding claims, characterized in that, on its inner circumferential face, the receiving sleeve (8) forms a stop which acts radially in the closing direction of the check valve (13).
EP11701505.7A 2010-02-26 2011-01-25 Proportional valve, in particular for a camshaft adjuster Not-in-force EP2539554B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010009401 DE102010009401A1 (en) 2010-02-26 2010-02-26 Proportional valve, in particular for a camshaft adjuster
PCT/EP2011/050977 WO2011104058A1 (en) 2010-02-26 2011-01-25 Proportional valve, in particular for a camshaft adjuster

Publications (2)

Publication Number Publication Date
EP2539554A1 EP2539554A1 (en) 2013-01-02
EP2539554B1 true EP2539554B1 (en) 2017-09-06

Family

ID=43842702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11701505.7A Not-in-force EP2539554B1 (en) 2010-02-26 2011-01-25 Proportional valve, in particular for a camshaft adjuster

Country Status (7)

Country Link
US (1) US20120312396A1 (en)
EP (1) EP2539554B1 (en)
KR (1) KR20130008013A (en)
CN (1) CN102770627B (en)
BR (1) BR112012021449A2 (en)
DE (1) DE102010009401A1 (en)
WO (1) WO2011104058A1 (en)

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DE102012214495B3 (en) * 2012-08-14 2013-12-24 Zf Friedrichshafen Ag Device for ensuring oil supply of secondary circuit of hydraulic system of gearbox of hybrid powertrain of motor car, has bypass valve closed at predetermined pressure to allow predetermined volumetric flow into secondary circuit
DE102014216175A1 (en) 2014-08-14 2016-02-18 Schaeffler Technologies AG & Co. KG Check valve for a control valve of a camshaft adjuster
CN112682122B (en) 2016-10-06 2022-09-09 博格华纳公司 Dual flap valve for variable cam timing system
US11111827B2 (en) 2016-10-06 2021-09-07 Borgwarner, Inc. Double flapper valve for a variable cam timing system
US10633837B2 (en) * 2017-10-18 2020-04-28 Chuan Wei Metal Co., Ltd. Structural improvement of piston set for use in hydrant
CN109854322B (en) * 2019-04-01 2024-06-21 绵阳富临精工机械股份有限公司 Central slide valve structure

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FR2396226A1 (en) * 1977-06-27 1979-01-26 Deere & Co Control valve for pump - contains fluid channel sealed by open ring, to reduce size
US6029703A (en) * 1998-12-18 2000-02-29 Borg-Warner Automotive, Inc. Pressure solenoid control valve with flux shunt
DE10143433B4 (en) 2001-09-05 2013-09-26 Hilite Germany Gmbh proportional valve
GB0303571D0 (en) * 2003-02-17 2003-03-19 Delphi Tech Inc Oil flow control valve for a cam phaser
DE10319831A1 (en) * 2003-05-03 2004-11-18 Hydraulik-Ring Gmbh Hydraulic valve socket
DE102004038252A1 (en) * 2004-05-14 2005-12-15 Ina-Schaeffler Kg Control valve for a device for changing the timing of an internal combustion engine
DE102005013085B3 (en) * 2005-03-18 2006-06-01 Hydraulik-Ring Gmbh Hydraulic valve for automobile, has check valve with band formed of closed ring, which serves as opening-free band and is made of spring steel, where steel forms ring by overlap of section of bands at about one hundred and eighty degree
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DE102005047641A1 (en) * 2005-10-05 2007-04-12 Schaeffler Kg Control valve for a camshaft adjuster
DE102005060111A1 (en) 2005-12-16 2007-07-05 Schaeffler Kg Camshaft adjuster feed line
DE102006022402A1 (en) * 2006-05-13 2007-12-06 Schaeffler Kg Control valve for a camshaft adjuster
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Also Published As

Publication number Publication date
CN102770627A (en) 2012-11-07
WO2011104058A1 (en) 2011-09-01
EP2539554A1 (en) 2013-01-02
KR20130008013A (en) 2013-01-21
CN102770627B (en) 2015-05-06
US20120312396A1 (en) 2012-12-13
DE102010009401A1 (en) 2011-09-01
BR112012021449A2 (en) 2016-05-31

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