WO2004005678A1 - Electromagnetic hydraulic valve, in particular a proportional valve used for controlling an adjusting device for the angle of rotation of a camshaft with respect to the crankshaft of an internal combustion engine - Google Patents
Electromagnetic hydraulic valve, in particular a proportional valve used for controlling an adjusting device for the angle of rotation of a camshaft with respect to the crankshaft of an internal combustion engine Download PDFInfo
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- WO2004005678A1 WO2004005678A1 PCT/EP2003/006672 EP0306672W WO2004005678A1 WO 2004005678 A1 WO2004005678 A1 WO 2004005678A1 EP 0306672 W EP0306672 W EP 0306672W WO 2004005678 A1 WO2004005678 A1 WO 2004005678A1
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- valve
- pole piece
- electromagnet
- face
- hydraulic valve
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Classifications
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- 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
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- 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
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- 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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
Definitions
- Electromagnetic hydraulic valve in particular proportional entil for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine
- the invention relates to an electromagnetic hydraulic valve according to the preamble-forming features of claim 1, and it can be implemented particularly advantageously on a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine.
- a generic electromagnetic hydraulic valve which is designed as a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine and essentially consists of an electromagnet and a valve part.
- the electromagnet has a hollow cylindrical magnet housing in which a coil winding and an axially movable magnet armature are arranged and which is axially delimited by a first and a second pole piece.
- the valve part is formed by a hollow cylindrical valve housing, in the hollow cylinder of which one of the magnet armature of the electromagnet against the Force of a spring axially displaceable control piston is received.
- connection between the electromagnet and the valve part of the hydraulic valve takes place in such a way that the second pole piece of the electromagnet arranged on the valve side is provided with an axial receiving bore for the valve housing and with a coaxial extension of this receiving bore, which is thin-walled at its free peripheral edge part ,
- the second pole piece of the electromagnet arranged on the valve side is provided with an axial receiving bore for the valve housing and with a coaxial extension of this receiving bore, which is thin-walled at its free peripheral edge part .
- one or two circumferential annular grooves or a plurality of annularly arranged depressions are then worked into the circumferential surface thereof, into which the thin-walled edge portion of the extension of the receiving bore of the second pole piece is either crimped, curled or locally caulked and thus the electromagnet and the valve part are form-fitting connects with each other.
- valve housing of the valve part is also inserted into an axial receiving bore in the valve-side pole piece of the electromagnet and is formed on the magnet-side end region with a circumferential annular groove in its peripheral surface.
- a disadvantage of this known hydraulic valve is that the respective joint connection between the electromagnet and the valve part requires one or more circumferential annular grooves or other depressions in the peripheral surface of the valve housing, the production of which, due to the required cycle times and necessary tools, requires increased effort and thus increased manufacturing costs caused for the hydraulic valve.
- the valve housing of the valve part mostly made of aluminum and the valve-side pole piece of the electromagnet provided for its fastening mostly consist of free-cutting steel and aluminum has a thermal expansion coefficient that is approx. 2.5 times higher than that of steel, such purely positive-fit joint connections cannot guarantee sufficient security either that the valve part and the electromagnet do not twist or loosen relative to one another over their entire service life under the influence of the operating temperature of the internal combustion engine.
- the invention is therefore based on the object of designing an electromagnetic hydraulic valve, in particular a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine, in which the joint connection between the electromagnet and the valve part is simple and inexpensive without additional ring grooves or Recesses in the valve housing can be produced and, even under the influence of the operating temperature of the internal combustion engine, ensures adequate security against twisting or loosening over the entire service life of the hydraulic valve.
- this object is achieved in a hydraulic valve according to the preamble of claim 1 in such a way that for the connection of the electromagnet to the valve part of the hydraulic valve directly adjacent to the peripheral surface of the valve housing, wedge-shaped local indentations are provided in the valve-side end face of the second pole shoe, with which punctiform material is provided displaced from the end face of the second pole piece into the mounting hole for the valve housing and thus the valve housing is locked in the mounting hole by a radially non-positive clamping.
- the radially non-positive clamping of the valve housing in the receiving bore of the second pole piece is preferably carried out by three notches which are offset by 120 ° to one another and which, in or slightly below the plane of the end face of the second pole piece, the material of the pole piece into the Displace the mounting hole.
- the number of three notches in the end face of the pole piece and their symmetrical arrangement around the valve housing has proven to be particularly suitable for generating a uniformly high pretensioning force on the valve housing resulting from the material stresses in the pole piece, with which the operating temperature also influences the internal combustion engine is guaranteed sufficient fatigue strength of the connection between the electromagnet and the valve part.
- the scope of the invention also includes connections between the electromagnet and the valve part of a hydraulic valve in which more or less than three notches arranged symmetrically and asymmetrically around the valve housing are pressed into the end face of the pole piece.
- the notches which are offset by 120 ° from one another, preferably be formed as rectangular recesses in the plane of the end face of the second pole shoe, which have a triangular profile cross section and with their longitudinal edges coaxial with the peripheral surface of the valve housing are arranged progressively.
- Such a shape of the notches means that the material of the pole piece is displaced only to a small extent in the axial direction and in the circumferential direction of the pole piece, but mainly in the radial direction of the pole piece outwards and inwards, the latter part forming the main part of the material displacement due to the immediate proximity to the mounting hole of the pole piece, with which the force-fitting clamping of the valve housing is realized in the mounting hole of the pole piece.
- the indentations are formed as recesses which are round or polygonal in the plane of the end face of the second pole shoe and which taper in point depth.
- the electromagnetic hydraulic valve designed according to the invention in particular a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine, thus has the advantage over the hydraulic valves known from the prior art that there are no preparatory measures for the joint connection between the electromagnet and the valve part , such as ring grooves or depressions on the magnet-side end of the valve housing or extensions of the receiving bore in the valve-side pole piece, are more necessary.
- valve housing which has a constant outside diameter, and the already existing receiving bore in the valve-side pole piece, which are connected to one another by simple local notches in the end face of the pole piece or by the resulting point-shaped plastic deformations in the pole piece.
- the caulking die which is required instead of a flanging tool, is also inexpensive to manufacture and maintain due to its simple construction and thus contributes to a further reduction in the manufacturing costs for the hydraulic valve designed according to the invention.
- Figure 1 is an overall view of the hydraulic valve designed according to the invention with a partial section through the electromagnet and the valve part;
- Figure 2 is an enlarged view of the detail X of Figure 1;
- Figure 3 is a view A of Figure 1 on the underside of the hydraulic valve designed according to the invention.
- the electromagnet 2 has a hollow cylindrical magnet housing 3, in which a coil winding 4 and an axially movable magnet armature 5 are arranged and which is axially delimited by a first pole shoe 6 and by a second pole shoe 7.
- the valve part 8, is formed by a hollow cylindrical valve housing 9, in the hollow cylinder 10 of which a control piston 13 which is axially displaceable by the magnet armature 5 of the electromagnet 2 against the force of a spring 12 is accommodated.
- This valve part 8 is clearly visible inserted in an axial receiving bore 14 in the second pole shoe 7 of the electromagnet 2 arranged on the valve side, via which the electromagnet 2 and the valve part 8 of the hydraulic valve 1 are radially and axially fixed to one another.
- the notches 16 in the end face 15 of the second pole shoe 7 are produced by an annular caulking die, not shown in the drawings, which encloses the valve housing 9 during the pressing process and on its lower end face has three teeth arranged at 120 ° to one another has triangular side surfaces and rectangular longitudinal surfaces.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention relates to an electromagnetic hydraulic valve (1) which comprises, on one side an electromagnet (2) provided with a magnet case (3) with a coil winding (4), a magnetic armature (5), a first pole piece (6) and a second pole piece (7) arranged therein. On the other side, said electromagnetic hydraulic valve (1) comprises a valve part (8) provided with a valve body (9) in the form of a whole cylinder (10) in which are arranged the following elements: a control piston (13) which is axially displaceable by the magnetic armature (5) of the electromagnet (2) in a direction opposite to the force of a spring (12). The valve body (9) is inserted into an axial mounting hole (14) disposed in the second pole piece (7) of the electromagnet (2) in such a way that the position thereof and the position of the valve part (8) of the hydraulic valve (1) are radially and axially fixed with respect to each other. The assembling of the electromagnet (2) and the valve part (8) is carried out by means of local wedge-shaped grooves (16) which are directly adjacent to th peripheral face (11) of the valve body (9) and embodied in the end face (15) of the second pole piece (7) on the valve side, Said grooves make it possible to displace a material in a punctual manner from the face (15) of the second pole piece (7) to the mounting hole (14) for the valve body (9).
Description
Bezeichnung der Erfindung Name of the invention
Elektromagnetisches Hydraulikventil, insbesondere Proportional entil zur Steuerung einer Vorrichtung zur Drehwinkelverstellung einer Nockenwelle gegenüber einer Kurbelwelle einer BrennkraftmaschineElectromagnetic hydraulic valve, in particular proportional entil for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine
Beschreibungdescription
Gebiet der ErfindungField of the Invention
Die Erfindung betrifft ein elektromagnetisches Hydraulikventil nach den oberbegriffsbildenden Merkmalen des Anspruchs 1 , und sie ist insbesondere vorteilhaft an einem Proportionalventil zur Steuerung einer Vorrichtung zur Drehwinkelverstellung einer Nockenwelle gegenüber einer Kurbelwelle einer Brenn- kraftmaschine realisierbar.The invention relates to an electromagnetic hydraulic valve according to the preamble-forming features of claim 1, and it can be implemented particularly advantageously on a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine.
Hintergrund der ErfindungBackground of the Invention
Durch die DE 199 56 160 A1 ist ein gattungsbildendes elektromagnetisches Hydraulikventil bekannt, welches als Proportionalventil zur Steuerung einer Vorrichtung zur Drehwinkelverstellung einer Nockenwelle gegenüber einer Kurbelwelle einer Brennkraftmaschine ausgebildet ist und im Wesentlichen aus einem Elektromagneten und aus einem Ventilteil besteht. Der Elektromagnet weist dabei ein hohlzylindrisches Magnetgehäuse auf, in dem eine Spulen- Wicklung und ein axial beweglicher Magnetanker angeordnet sind und welches von einem ersten und einem zweiten Polschuh axial begrenzt wird. Das Ventilteil wird demgegenüber durch ein hohlzylindrisches Ventilgehäuse gebildet, in dessen Hohlzylinder ein vom Magnetanker des Elektromagneten gegen die
Kraft einer Feder axial verschiebbarer Steuerkolben aufgenommen ist. Die Verbindung zwischen dem Elektromagneten und dem Ventilteil des Hydraulikventils erfolgt dabei derart, dass der ventilseitig angeordnete zweite Polschuh des Elektromagneten mit einer axialen Aufnahmebohrung für das Ventilgehäu- se und mit einer koaxialen Verlängerung dieser Aufnahmebohrung versehen wird, die an ihrer freien umlaufenden Randpartie dünnwandig ausgebildet ist. Am magnetseitigen Endbereich des Ventilgehäuses sind dann in dessen Umfangsfläche ein oder zwei umlaufende Ringnuten oder mehrere ringförmig angeordnete Vertiefungen eingearbeitet, in welche die dünnwandige Randpartie der Verlängerung der Aufnahmebohrung des zweiten Polschuhs entweder eingebördelt, einrolliert oder örtlich verstemmt wird und somit den Elektromagneten und das Ventilteil formschlüssig miteinander verbindet.From DE 199 56 160 A1 a generic electromagnetic hydraulic valve is known, which is designed as a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine and essentially consists of an electromagnet and a valve part. The electromagnet has a hollow cylindrical magnet housing in which a coil winding and an axially movable magnet armature are arranged and which is axially delimited by a first and a second pole piece. In contrast, the valve part is formed by a hollow cylindrical valve housing, in the hollow cylinder of which one of the magnet armature of the electromagnet against the Force of a spring axially displaceable control piston is received. The connection between the electromagnet and the valve part of the hydraulic valve takes place in such a way that the second pole piece of the electromagnet arranged on the valve side is provided with an axial receiving bore for the valve housing and with a coaxial extension of this receiving bore, which is thin-walled at its free peripheral edge part , At the magnet-side end region of the valve housing, one or two circumferential annular grooves or a plurality of annularly arranged depressions are then worked into the circumferential surface thereof, into which the thin-walled edge portion of the extension of the receiving bore of the second pole piece is either crimped, curled or locally caulked and thus the electromagnet and the valve part are form-fitting connects with each other.
Eine andere Möglichkeit, den Elektromagneten und das Ventilteil eines elek- tromagnetischen Hydraulikventils miteinander zu verbinden, ist durch die in der DE 41 31 384 C2 offenbarte Lösung bekannt. Bei diesem, im Wesentlichen aus den gleichen Bauteilen bestehenden Hydraulikventil wird das Ventilgehäuse des Ventilteils ebenfalls in eine axiale Aufnahmebohrung im ventilseitigen Polschuh des Elektromagneten eingesetzt und am magnetseitigen Endbereich mit einer umlaufenden Ringnut in dessen Umfangsfläche ausgebildet. Mit einem Bördelwerkzeug, welches das Ventilgehäuse umschließt und an seiner unteren Stirnseite mit auf der Stirnfläche des ventilseitigen Polschuhs aufsetzbaren Schneiden versehen ist, wird dann am gesamten Umfang des Ventilgehäuses Material aus der Stirnfläche des Polschuhs in die umlaufende Ringnut im Ven- tilgehäuse verdrängt und somit ebenfalls eine formschlüssige Verbindung zwischen dem Elektromagneten und dem Ventilteil des Hydraulikventils geschaffen.Another possibility of connecting the electromagnet and the valve part of an electromagnetic hydraulic valve to one another is known from the solution disclosed in DE 41 31 384 C2. In this hydraulic valve, which essentially consists of the same components, the valve housing of the valve part is also inserted into an axial receiving bore in the valve-side pole piece of the electromagnet and is formed on the magnet-side end region with a circumferential annular groove in its peripheral surface. With a flaring tool that encloses the valve housing and is provided on its lower end with cutters that can be placed on the end face of the valve-side pole piece, material is then displaced from the end face of the pole piece into the circumferential annular groove in the valve housing over the entire circumference of the valve piece, and thus likewise created a positive connection between the electromagnet and the valve part of the hydraulic valve.
Nachteilig bei diesem bekannten Hydraulikventilen ist es jedoch, dass die jeweilige Fügeverbindung zwischen dem Elektromagneten und dem Ventilteil eine oder mehrere umlaufende Ringnuten oder andere Vertiefungen in der Umfangsfläche des Ventilgehäuses erfordert, deren Fertigung durch die erforderlichen Taktzeiten und notwendigen Werkzeuge einen erhöhten Aufwand und damit erhöhte Herstellungskosten für das Hydraulikventil verursacht. Da
darüber hinaus das Ventilgehäuse des Ventilteils zumeist aus Aluminium und der zu dessen Befestigung vorgesehene ventilseitige Polschuh des Elektromagneten zumeist aus einem Automatenstahl bestehen und Aluminium gegenüber Stahl eine ca. 2,5-fach höheren Wärmeausdehnungskoeffizienten aufweist, können solche rein formschlüssigen Fügeverbindungen auch keine ausreichende Sicherheit gewährleisten, dass das Ventilteil und der Elektromagnet unter Einfluss der Betriebstemperatur der Brennkraftmaschine sich über deren gesamte Lebensdauer nicht zueinander verdrehen oder lockern.A disadvantage of this known hydraulic valve, however, is that the respective joint connection between the electromagnet and the valve part requires one or more circumferential annular grooves or other depressions in the peripheral surface of the valve housing, the production of which, due to the required cycle times and necessary tools, requires increased effort and thus increased manufacturing costs caused for the hydraulic valve. There In addition, the valve housing of the valve part mostly made of aluminum and the valve-side pole piece of the electromagnet provided for its fastening mostly consist of free-cutting steel and aluminum has a thermal expansion coefficient that is approx. 2.5 times higher than that of steel, such purely positive-fit joint connections cannot guarantee sufficient security either that the valve part and the electromagnet do not twist or loosen relative to one another over their entire service life under the influence of the operating temperature of the internal combustion engine.
Aufgabe der ErfindungObject of the invention
Der Erfindung liegt deshalb die Aufgabe zugrunde, ein elektromagnetisches Hydraulikventil, insbesondere Proportionalventil zur Steuerung einer Vorrichtung zur Drehwinkelverstellung einer Nockenwelle gegenüber einer Kurbel- welle einer Brennkraftmaschine, zu konzipieren, bei welchem die Fügeverbindung zwischen dem Elektromagneten und dem Ventilteil einfach und kostengünstig ohne zusätzliche Ringnuten oder Vertiefungen im Ventilgehäuse herstellbar ist und auch unter Einfluss der Betriebstemperatur der Brennkraftmaschine eine ausreichende Sicherheit gegen das Verdrehen oder Lockern über die gesamte Lebensdauer des Hydraulikventils gewährleistet.The invention is therefore based on the object of designing an electromagnetic hydraulic valve, in particular a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine, in which the joint connection between the electromagnet and the valve part is simple and inexpensive without additional ring grooves or Recesses in the valve housing can be produced and, even under the influence of the operating temperature of the internal combustion engine, ensures adequate security against twisting or loosening over the entire service life of the hydraulic valve.
Zusammenfassung der ErfindungSummary of the invention
Erfindungsgemäß wird diese Aufgabe bei einem Hydraulikventil nach dem Oberbegriff des Anspruchs 1 derart gelöst, dass zur Verbindung des Elektromagneten mit dem Ventilteil des Hydraulikventils unmittelbar neben der Umfangsfläche des Ventilgehäuses keilförmig in die ventilseitige Stirnfläche des zweiten Polschuhs eingepresste örtliche Einkerbungen vorgesehen sind, mit denen punktformig Material aus der Stirnfläche des zweiten Polschuhs in die Aufnahmebohrung für das Ventilgehäuse verdrängt und somit das Ventilgehäuse in der Aufnahmebohrung durch eine radial kraftschlüssige Einspannung arretiert wird.
In zweckmäßiger Weiterbildung des erfindungsgemäß ausgebildeten Hydraulikventils erfolgt die radial kraftschlüssige Einspannung des Ventilgehäuses in der Aufnahmebohrung des zweiten Polschuhs dabei bevorzugt durch drei um 120° versetzt zueinander angeordnete Einkerbungen, die in oder geringfügig unterhalb der Ebene der Stirnfläche des zweiten Polschuhs das Material des Polschuhs in die Aufnahmebohrung verdrängen. Die Anzahl von drei Einkerbungen in der Stirnfläche des Polschuhs und deren symmetrische Anordnung um das Ventilgehäuse hat sich dabei als besonders geeignet erwiesen, um eine aus den entstehenden Materialspannungen im Polschuh resultierende gleichmäßig hohe Vorspannkraft auf das Ventilgehäuse zu erzeugen, mit der auch unter Einfluss der Betriebstemperatur der Brennkraftmaschine eine ausreichende Dauerfestigkeit der Verbindung zwischen dem Elektromagnet und dem Ventilteil gewährleistet ist. Gleichzeitig wird mit drei symmetrisch angeordneten Einkerbungen im Polschuh ein Verkanten des Ventilgehäuses in der Aufnahmebohrung im Polschuh bzw. ein axialer Versatz des den Steuerkolben des Ventilteils führenden Hohlzylinders des Ventilgehäuses zum Magnetanker des Elektromagneten vermieden, um daraus resultierende Funktionsbeeinträchtigungen des Hydraulikventils auszuschließen. Vom Schutzumfang der Erfindung eingeschlossen sollen jedoch auch solche Verbindungen zwischen dem Elektromagneten und dem Ventilteil eines Hydraulikventils sein, bei denen mehr oder auch weniger als drei sowohl symmetrisch als auch unsymmetrisch um das Ventilgehäuse angeordnete Einkerbungen in die Stirnfläche des Polschuhs eingepresst werden.According to the invention, this object is achieved in a hydraulic valve according to the preamble of claim 1 in such a way that for the connection of the electromagnet to the valve part of the hydraulic valve directly adjacent to the peripheral surface of the valve housing, wedge-shaped local indentations are provided in the valve-side end face of the second pole shoe, with which punctiform material is provided displaced from the end face of the second pole piece into the mounting hole for the valve housing and thus the valve housing is locked in the mounting hole by a radially non-positive clamping. In an expedient development of the hydraulic valve designed according to the invention, the radially non-positive clamping of the valve housing in the receiving bore of the second pole piece is preferably carried out by three notches which are offset by 120 ° to one another and which, in or slightly below the plane of the end face of the second pole piece, the material of the pole piece into the Displace the mounting hole. The number of three notches in the end face of the pole piece and their symmetrical arrangement around the valve housing has proven to be particularly suitable for generating a uniformly high pretensioning force on the valve housing resulting from the material stresses in the pole piece, with which the operating temperature also influences the internal combustion engine is guaranteed sufficient fatigue strength of the connection between the electromagnet and the valve part. At the same time, with three symmetrically arranged notches in the pole piece, tilting of the valve housing in the receiving bore in the pole piece or axial displacement of the hollow cylinder of the valve housing leading the control piston of the valve part to the magnet armature of the electromagnet is avoided in order to rule out the resulting functional impairments of the hydraulic valve. However, the scope of the invention also includes connections between the electromagnet and the valve part of a hydraulic valve in which more or less than three notches arranged symmetrically and asymmetrically around the valve housing are pressed into the end face of the pole piece.
Als vorteilhafte Ausgestaltung des erfindungsgemäß ausgebildeten Hydraulikventils wird es darüber hinaus noch vorgeschlagen, die um 120° versetzt zueinander angeordneten Einkerbungen bevorzugt als in der Ebene der Stirnfläche des zweiten Polschuhs rechteckförmige Vertiefungen auszubilden, die einen dreieckigen Profilquerschnitt aufweisen und mit ihren Längskanten koaxial zur Umfangsfläche des Ventilgehäuses verlaufend angeordnet sind. Durch eine derartige Form der Einkerbungen erfolgt die Verdrängung des Materials des Polschuhs nur zu einem geringen Anteil in Axialrichtung und in Umfangsrich- tung des Polschuhs, sondern hauptsächlich in Radialrichtung des Polschuhs
nach außen und nach innen, wobei der letztgenannte Anteil durch die unmittelbare Nähe zur Aufnahmebohrung des Polschuhs den Hauptanteil der Materialverdrängung bildet, mit dem die kraftschlüssige Einspannung des Ventilgehäuses in der Aufnahmebohrung des Polschuhs realisiert wird. Gleiche oder zu- mindest ähnliche Wirkung lassen sich jedoch auch erzielen, wenn die Einkerbungen als in der Ebene der Stirnfläche des zweiten Polschuhs runde oder mehrkantförmige Vertiefungen ausgebildet werden, die sich in ihrer Tiefe punktformig verjüngen.As an advantageous embodiment of the hydraulic valve designed according to the invention, it is also proposed that the notches, which are offset by 120 ° from one another, preferably be formed as rectangular recesses in the plane of the end face of the second pole shoe, which have a triangular profile cross section and with their longitudinal edges coaxial with the peripheral surface of the valve housing are arranged progressively. Such a shape of the notches means that the material of the pole piece is displaced only to a small extent in the axial direction and in the circumferential direction of the pole piece, but mainly in the radial direction of the pole piece outwards and inwards, the latter part forming the main part of the material displacement due to the immediate proximity to the mounting hole of the pole piece, with which the force-fitting clamping of the valve housing is realized in the mounting hole of the pole piece. The same or at least similar effect can, however, also be achieved if the indentations are formed as recesses which are round or polygonal in the plane of the end face of the second pole shoe and which taper in point depth.
Hinsichtlich der Herstellung der Einkerbungen in die Stirnfläche des zweiten Polschuhs des Elektromagneten des erfindungsgemäß ausgebildeten Hydraulikventils wird es schließlich noch vorgeschlagen, diese mittels einer kreisringförmigen Verstemm-Matrize einzupressen, welche das Ventilgehäuse umschließt und an ihrer unteren Stirnseite drei um 120° versetzt zueinander an- geordnete keilförmige Zähne aufweist. Entsprechend der bevorzugten Form der Einkerbungen im Polschuh des Elektromagneten weisen diese Zähne dreieckige Seitenflächen und rechteckige Längsflächen auf, von denen zwei Längsflächen jeweils eine senkrecht auf den Polschuh aufsetzbare Umformkante bilden. Eine derartige Verstemm-Matrize hat sich besonders vorteilhaft hinsichtlich ihrer einfachen und kostengünstigen Herstellbarkeit erwiesen und weist darüber hinaus eine hohe Werkzeugstandzeit auf, da die keilförmigen Zähne symmetrisch zueinander angeordnet sind und somit nur einem geringen Verschleiß unterliegen.With regard to the production of the notches in the end face of the second pole piece of the electromagnet of the hydraulic valve designed according to the invention, it is finally proposed to press them in by means of an annular caulking die which encloses the valve housing and is arranged on its lower end face three offset by 120 ° to one another has wedge-shaped teeth. According to the preferred shape of the notches in the pole piece of the electromagnet, these teeth have triangular side surfaces and rectangular longitudinal surfaces, of which two longitudinal surfaces each form a forming edge that can be placed perpendicularly on the pole piece. Such a caulking die has proven to be particularly advantageous in terms of its simple and cost-effective manufacture and, moreover, has a long tool life, since the wedge-shaped teeth are arranged symmetrically to one another and are therefore subject to only slight wear.
Das erfindungsgemäß ausgebildete elektromagnetische Hydraulikventil, insbesondere Proportionalventil zur Steuerung einer Vorrichtung zur Drehwinkelverstellung einer Nockenwelle gegenüber einer Kurbelwelle einer Brennkraftmaschine, weist somit gegenüber den aus dem Stand der Technik bekannten Hydraulikventilen den Vorteil auf, dass für die Fügeverbindung zwischen dem Elektromagneten und dem Ventilteil keinerlei vorbereitende Maßnahmen, wie Ringnuten oder Vertiefungen am magnetseitigen Ende des Ventilgehäuses oder Verlängerungen der Aufnahmebohrung im ventilseitigen Polschuh, mehr notwendig sind. Für die Fügeverbindung zwischen dem Elektromagneten und
dem Ventilteil sind nunmehr nur noch das mit einem gleichbleibenden Außendurchmesser ausgebildete Ventilgehäuse und die bereits vorhandene Aufnahmebohrung im ventilseitigen Polschuh erforderlich, die durch einfache örtliche Einkerbungen in der Stirnfläche des Polschuhs bzw. durch die daraus resultie- renden punktförmigen plastischen Verformungen im Polschuh miteinander verbunden werden. Dadurch entfallen die für die Fertigung zusätzlicher Ringnuten, Vertiefungen oder Verlängerungen erforderlichen Taktzeiten und Werkzeuge, so dass die Herstellungskosten für das Hydraulikventil erheblich gesenkt werden. Die anstelle eines Bördelwerkzeuges benötigte Verstemm-Ma- trize ist durch ihren einfachen Aufbau ebenfalls kostengünstig in ihrer Herstellung und Unterhaltung und trägt somit zur weiteren Senkung der Herstellungskosten für das erfindungsgemäß ausgebildete Hydraulikventil bei. Darüber hinaus sind mit der kraftschlüssigen Verstemmung zwischen dem Ventilgehäuse und dem ventilseitigen Polschuh gegenüber dem formschlüssigen Verbördeln wesentlich höher Festigkeiten bei der Verbindung des Elektromagneten mit dem Ventilteil realisierbar, die auch unter Einfluß der Betriebstemperatur der Brennkraftmaschine eine ausreichende Sicherheit gegen Verdrehen oder Verlockern der Verbindung über die gesamte Lebensdauer des Hydraulikventils gewährleisten.The electromagnetic hydraulic valve designed according to the invention, in particular a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine, thus has the advantage over the hydraulic valves known from the prior art that there are no preparatory measures for the joint connection between the electromagnet and the valve part , such as ring grooves or depressions on the magnet-side end of the valve housing or extensions of the receiving bore in the valve-side pole piece, are more necessary. For the joint connection between the electromagnet and All that is required of the valve part is now only the valve housing, which has a constant outside diameter, and the already existing receiving bore in the valve-side pole piece, which are connected to one another by simple local notches in the end face of the pole piece or by the resulting point-shaped plastic deformations in the pole piece. This eliminates the cycle times and tools required for the production of additional ring grooves, recesses or extensions, so that the manufacturing costs for the hydraulic valve are considerably reduced. The caulking die, which is required instead of a flanging tool, is also inexpensive to manufacture and maintain due to its simple construction and thus contributes to a further reduction in the manufacturing costs for the hydraulic valve designed according to the invention. In addition, with the non-positive caulking between the valve housing and the valve-side pole piece compared to the positive flanging, much higher strengths can be achieved when connecting the electromagnet to the valve part, which, even under the influence of the operating temperature of the internal combustion engine, provide adequate security against twisting or loosening of the connection via the Ensure the entire service life of the hydraulic valve.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher erläutert und ist in den dazugehörigen Zeichnungen schematisch dargestellt. Dabei zeigen:The invention is explained in more detail below using an exemplary embodiment and is shown schematically in the accompanying drawings. Show:
Figur 1 eine Gesamtansicht des erfindungsgemäß ausgebildeten Hydraulikventils mit einem Teilschnitt durch den Elektromagneten und das Ventilteil;Figure 1 is an overall view of the hydraulic valve designed according to the invention with a partial section through the electromagnet and the valve part;
Figur 2 eine vergrößerte Darstellung der Einzelheit X nach Figur 1 ;
Figur 3 eine Ansicht A nach Figur 1 auf die Unterseite des erfindungsgemäß ausgebildeten Hydraulikventils.Figure 2 is an enlarged view of the detail X of Figure 1; Figure 3 is a view A of Figure 1 on the underside of the hydraulic valve designed according to the invention.
Ausführliche Beschreibung der ZeichnungenDetailed description of the drawings
Aus Figur 1 geht deutlich ein elektromagnetisches Hydraulikventil 1 hervor, welches als Proportionalventil zur Steuerung einer Vorrichtung zur Drehwinkelverstellung einer Nockenwelle gegenüber einer Kurbelwelle einer Brennkraftmaschine ausgebildet ist und im Wesentlichen aus einem Elektromagnet 2 und aus einem Ventilteil 8 besteht. Der Elektromagnet 2 weist dabei ein hohlzylindrisches Magnetgehäuse 3 auf, in dem eine Spulenwicklung 4 und ein axial beweglicher Magnetanker 5 angeordnet sind und welches durch einen ersten Polschuh 6 und durch einen zweiten Polschuh 7 axial begrenzt wird. Das Ventilteil 8 wird demgegenüber durch ein hohlzylindrisches Ventilgehäuse 9 gebil- det, in dessen Hohizylinder 10 ein vom Magnetanker 5 des Elektromagneten 2 gegen die Kraft einer Feder 12 axial verschiebbare Steuerkolben 13 aufgenommen ist. Dieses Ventilteil 8 ist deutlich sichtbar in eine axiale Aufnahmebohrung 14 im ventilseitig angeordneten zweiten Polschuh 7 des Elektromagneten 2 eingesetzt, über welche der Elektromagnet 2 und das Ventilteil 8 des Hydraulikventils 1 radial und axial zueinander lagerfixiert sind.1 clearly shows an electromagnetic hydraulic valve 1, which is designed as a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine and essentially consists of an electromagnet 2 and a valve part 8. The electromagnet 2 has a hollow cylindrical magnet housing 3, in which a coil winding 4 and an axially movable magnet armature 5 are arranged and which is axially delimited by a first pole shoe 6 and by a second pole shoe 7. The valve part 8, on the other hand, is formed by a hollow cylindrical valve housing 9, in the hollow cylinder 10 of which a control piston 13 which is axially displaceable by the magnet armature 5 of the electromagnet 2 against the force of a spring 12 is accommodated. This valve part 8 is clearly visible inserted in an axial receiving bore 14 in the second pole shoe 7 of the electromagnet 2 arranged on the valve side, via which the electromagnet 2 and the valve part 8 of the hydraulic valve 1 are radially and axially fixed to one another.
In der in Figur 2 gezeigten vergrößerten Darstellung der Einzelheit X in Figur 1 ist desweiteren erkennbar, dass zur Verbindung des Elektromagneten 2 mit dem Ventilteil 8 des Hydraulikventils 1 erfindungsgemäß unmittelbar neben der Umfangsfläche 11 des Ventilgehäuses 9 mehrere keilförmig in die ventilseitige Stirnseite 15 des zweiten Polschuhs 7 eingepresste örtliche Einkerbungen 16 vorgesehen sind, mit denen punktformig Material aus der Stirnfläche 15 des zweiten Polschuhs 7 in die Aufnahmebohrung 14 für das Ventilgehäuse 9 gedrängt wird. Die Materialverdrängung im ventilseitigen Polschuh 7 erfolgt dabei hauptsächlich radial nach innen in Richtung der Aufnahmebohrung 14 im ventilseitigen Polschuh 7, so dass das Ventilgehäuse, wie in der Zeichnung zu sehen ist, durch eine radial kraftschlüssige Einspannung in der Aufnahmebohrung 14 des Polschuhs arretiert wird. Aus Figur 3 ist dabei ersichtlich, dass die
radial kraftschlüssige Einspannung des Ventilgehäuses durch drei um 120° versetzt zueinander angeordnete Einkerbungen 16 erfolgt, die in oder geringfügig unterhalb der Ebene der Stirnfläche 15 des zweiten Polschuhs 7 das Material des Polschuhs 7 in die Aufnahmebohrung 14 verdrängen. Hinsichtlich ihrer Geometrie sind diese um 120° versetzt zueinander angeordneten Einkerbungen 16, wie in Figur 3 angedeutet, als in der Ebene der Stirnfläche 15 des zweiten Polschuhs 7 eine Rechteckform aufweisende Vertiefungen ausgebildet, die einen in Figur 2 erkennbaren dreieckigen Profilquerschnitt aufweisen und mit ihren Längskanten 17 koaxial zur Umfangsfläche 11 des Ventilgehäu- ses 9 verlaufen.In the enlarged representation of the detail X in FIG. 1 shown in FIG. 2, it can also be seen that for connecting the electromagnet 2 to the valve part 8 of the hydraulic valve 1, according to the invention, directly next to the peripheral surface 11 of the valve housing 9, several wedge-shaped into the valve-side end face 15 of the second pole piece 7 pressed-in local notches 16 are provided, with which point material is forced out of the end face 15 of the second pole shoe 7 into the receiving bore 14 for the valve housing 9. The material displacement in the valve-side pole piece 7 takes place mainly radially inward in the direction of the receiving bore 14 in the valve-side pole piece 7, so that the valve housing, as can be seen in the drawing, is locked in place in the receiving hole 14 of the pole piece by a radially non-positive clamping. From Figure 3 it can be seen that the radially non-positive clamping of the valve housing takes place by means of three notches 16 arranged at 120 ° to one another, which displace the material of the pole piece 7 into the receiving bore 14 in or slightly below the plane of the end face 15 of the second pole piece 7. With regard to their geometry, these notches 16, which are offset by 120 ° to one another, as indicated in FIG. 3, are formed as recesses which have a rectangular shape in the plane of the end face 15 of the second pole shoe 7 and which have a triangular profile cross section which can be seen in FIG 17 run coaxially to the peripheral surface 11 of the valve housing 9.
Die Herstellung der Einkerbungen 16 in der Stirnfläche 15 des zweiten Polschuhs 7 erfolgt im übrigen durch eine in den Zeichnungen nicht dargestellte, kreisringförmige Verstemm-Matrize, die beim Pressvorgang das Ventilgehäuse 9 umschließt und an ihrer unteren Stirnseite drei um 120° versetzt zueinander angeordnete Zähne mit dreieckigen Seitenflächen und rechteckigen Längsflächen aufweist.
The notches 16 in the end face 15 of the second pole shoe 7 are produced by an annular caulking die, not shown in the drawings, which encloses the valve housing 9 during the pressing process and on its lower end face has three teeth arranged at 120 ° to one another has triangular side surfaces and rectangular longitudinal surfaces.
BezugszahlenlisteLIST OF REFERENCE NUMBERS
Hydraulikventilhydraulic valve
Elektromagnetelectromagnet
Magnetgehäusemagnet housing
Spulenwicklungcoil winding
Magnetanker erster Polschuh zweiter PolschuhMagnetic anchor first pole shoe second pole shoe
Ventilteilvalve part
Ventilgehäusevalve housing
Hohizylinderhollow cylinder
Umfangsflächeperipheral surface
Federfeather
Steuerkolbenspool
Aufnahmebohrunglocation hole
Stirnflächeface
Einkerbungennotches
Längskanten
longitudinal edges
Claims
Elektromagnetisches Hydraulikventil, insbesondere Proportionalventil zur Steuerung einer Vorrichtung zur Drehwinkelverstellung einer Nockenwelle gegenüber einer Kurbelwelle einer Brennkraftmaschine, mit folgenden Merkmalen:Electromagnetic hydraulic valve, in particular a proportional valve for controlling a device for adjusting the angle of rotation of a camshaft relative to a crankshaft of an internal combustion engine, with the following features:
■ das Hydraulikventil (1) besteht zum einen aus einem Elektromagnet (2) mit einem hohlzylindrischen Magnetgehäuse (3), zumindest einer Spulenwicklung (4) und einem axial beweglichen Magnetanker (5) sowie mit einem ersten Polschuh (6) und einem zweiten Polschuh (7), ■ the hydraulic valve (1) consists on the one hand of an electromagnet (2) with a hollow-cylindrical magnet housing (3), at least one coil winding (4) and an axially movable magnet armature (5) and with a first pole piece (6) and a second pole piece ( 7)
■ das Hydraulikventil (1) besteht zum anderen aus einem Ventilteil (8) mit einem hohlzylindrischen Ventilgehäuse (9), in dessen Hohizylinder (10) ein vom Magnetanker (5) des Elektromagneten (2) gegen die Kraft einer Feder (12) axial verschiebbarer Steuerkolben (13) aufgenommen ist,■ The hydraulic valve (1) consists on the other of a valve part (8) with a hollow cylindrical valve housing (9), in the hollow cylinder (10) of which is axially displaceable against the force of a spring (12) by the magnet armature (5) of the electromagnet (2) Control piston (13) is received,
■ der ventilseitig angeordnete zweite Polschuh (7) des Elektromagneten (2) weist eine axiale Aufnahmebohrung (14) für das Ventilgehäuse (9) auf, über welche der Elektromagnet (2) und das Ventilteil (8) des Hydraulikventils (1) radial und axial zueinander lagefixiert sind,■ The second pole piece (7) of the electromagnet (2) arranged on the valve side has an axial receiving bore (14) for the valve housing (9), via which the electromagnet (2) and the valve part (8) of the hydraulic valve (1) radially and axially are fixed to each other,
dadurch gekennzeichnet, dasscharacterized in that
■ zur Verbindung des Elektromagneten (2) mit dem Ventilteil (8) des Hydraulikventils (1) unmittelbar neben der Umfangsfläche (11 ) des Ventilgehäuses (9) keilförmig in die ventilseitige Stirnfläche (15) des zweiten Pol- schuhs (7) eingepresste örtliche Einkerbungen (16) vorgesehen sind, ■ mit denen punktformig Material aus der Stirnfläche (15) des zweiten Polschuhs (7) in die Aufnahmebohrung (14) für das Ventilgehäuse (9) verdrängbar und somit das Ventilgehäuse (9) in der Aufnahmebohrung (14) durch eine radial kraftschlüssige Einspannung arretierbar ist. ■ for connecting the electromagnet (2) to the valve part (8) of the hydraulic valve (1) immediately next to the peripheral surface (11) of the valve housing (9) wedge-shaped local indentations pressed into the valve-side end face (15) of the second pole shoe (7) (16) are provided ■ with which point material can be displaced from the end face (15) of the second pole shoe (7) into the receiving bore (14) for the valve housing (9) and thus the valve housing (9) can be locked in the receiving bore (14) by a radially non-positive clamping ,
2. Hydraulikventil nach Anspruch 1 , dadurch gekennzeichnet, dass die radial kraftschlüssige Einspannung des Ventilgehäuses (9) in der Aufnahmebohrung (14) des zweiten Polschuhs (7) bevorzugt durch drei um 120° versetzt zueinander angeordnete Einkerbungen (16) erfolgt, die in oder geringfügig unterhalb der Ebene der Stirnfläche (15) des zweiten Polschuhs (7) das Material des zweiten Polschuhs (7) in die Aufnahmebohrung (14) verdrängen.2. Hydraulic valve according to claim 1, characterized in that the radially non-positive clamping of the valve housing (9) in the receiving bore (14) of the second pole piece (7) is preferably carried out by three notches (16) offset from one another by 120 °, which in or slightly below the plane of the end face (15) of the second pole piece (7), displace the material of the second pole piece (7) into the receiving bore (14).
3. Hydraulikventil nach Anspruch 2, dadurch gekennzeichnet, dass die um 120° versetzt zueinander angeordneten Einkerbungen (16) bevorzugt als in der Ebene der Stirnfläche (15) des zweiten Polschuhs (7) rechteckigförmige Vertiefungen ausgebildet sind, die einen dreieckigen Profilquerschnitt aufweisen und mit ihren Längskanten (17) koaxial zur Umfangsfläche (11) des Ventilgehäuses (9) verlaufend angeordnet sind.3. Hydraulic valve according to claim 2, characterized in that the notches (16) offset from one another by 120 ° are preferably formed as rectangular depressions in the plane of the end face (15) of the second pole shoe (7) which have a triangular profile cross section and with their longitudinal edges (17) are arranged coaxially to the peripheral surface (11) of the valve housing (9).
4. Hydraulikventil nach Anspruch 3, dadurch gekennzeichnet, dass die Einkerbungen (16) in der Stirnfläche (15) des zweiten Polschuhs (7) bevorzugt durch eine kreisringförmige, das Ventilgehäuse (9) umschließende Verstemm-Matrize herstellbar sind, die an ihrer unteren Stirnseite drei um 120° versetzt zueinander angeordnete keilförmige Zähne mit dreieckigen Seiten- flächen und rechteckigen Längsflächen aufweist. 4. Hydraulic valve according to claim 3, characterized in that the notches (16) in the end face (15) of the second pole piece (7) are preferably producible by an annular caulking die which encloses the valve housing (9) and which is on its lower end face has three wedge-shaped teeth arranged at 120 ° to each other with triangular side surfaces and rectangular longitudinal surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003281280A AU2003281280A1 (en) | 2002-07-04 | 2003-06-25 | Electromagnetic hydraulic valve, in particular a proportional valve used for controlling an adjusting device for the angle of rotation of a camshaft with respect to the crankshaft of an internal combustion engine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2002129912 DE10229912B4 (en) | 2002-07-04 | 2002-07-04 | Electromagnetic hydraulic valve, in particular proportional valve for controlling a device for adjusting the rotational angle of a camshaft relative to a crankshaft of an internal combustion engine |
| DE10229912.9 | 2002-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004005678A1 true WO2004005678A1 (en) | 2004-01-15 |
Family
ID=29723672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2003/006672 WO2004005678A1 (en) | 2002-07-04 | 2003-06-25 | Electromagnetic hydraulic valve, in particular a proportional valve used for controlling an adjusting device for the angle of rotation of a camshaft with respect to the crankshaft of an internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2003281280A1 (en) |
| DE (1) | DE10229912B4 (en) |
| WO (1) | WO2004005678A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1596041A3 (en) * | 2004-05-14 | 2008-07-16 | Schaeffler KG | Control valve for a camshaft timing phaser in an internal combustion engine |
| CN104948252A (en) * | 2014-03-28 | 2015-09-30 | 舍弗勒技术股份两合公司 | End-fed engine oil control valve and variable valve timing system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005034939A1 (en) * | 2005-07-27 | 2007-02-01 | Schaeffler Kg | Electromagnetic adjustment unit for hydraulic directional control valve, has press-fit structure which comprises material masses formed on magnet yoke tubular region extending radially outwards over edges of base opening of housing |
| DE102005041395B4 (en) * | 2005-09-01 | 2014-11-27 | Schaeffler Technologies Gmbh & Co. Kg | Hydraulic directional valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19956160A1 (en) | 1999-11-23 | 2001-05-31 | Schaeffler Waelzlager Ohg | Magnetic valve, especially hydraulic proportional valve, has electromagnet and valve part joined radially, axially in force-locking and/or shape-locking manner by electromagnet pole shoe |
| US6289921B1 (en) * | 1997-06-26 | 2001-09-18 | Hydraulik-Ring Gmbh | Hydraulic valve, especially for controlling a camshaft movement in a motor vehicle |
| US6315268B1 (en) * | 1999-07-24 | 2001-11-13 | Hydraulik-Ring Gmbh | Solenoid and hydraulic valve with a solenoid |
| EP1158230A2 (en) * | 2000-05-22 | 2001-11-28 | Eaton Corporation | Solenoid operated pressure control valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4131384C2 (en) * | 1991-09-20 | 1994-10-06 | Rexroth Mannesmann Gmbh | Electrically operated valve |
| DE4319488A1 (en) * | 1993-06-11 | 1994-12-15 | Rexroth Mannesmann Gmbh | Force balancing of proportional or switching magnets |
| DE4423103C2 (en) * | 1994-07-01 | 1997-12-04 | Rexroth Mannesmann Gmbh | Electromagnetically actuated valve |
-
2002
- 2002-07-04 DE DE2002129912 patent/DE10229912B4/en not_active Expired - Fee Related
-
2003
- 2003-06-25 AU AU2003281280A patent/AU2003281280A1/en not_active Abandoned
- 2003-06-25 WO PCT/EP2003/006672 patent/WO2004005678A1/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6289921B1 (en) * | 1997-06-26 | 2001-09-18 | Hydraulik-Ring Gmbh | Hydraulic valve, especially for controlling a camshaft movement in a motor vehicle |
| US6315268B1 (en) * | 1999-07-24 | 2001-11-13 | Hydraulik-Ring Gmbh | Solenoid and hydraulic valve with a solenoid |
| DE19956160A1 (en) | 1999-11-23 | 2001-05-31 | Schaeffler Waelzlager Ohg | Magnetic valve, especially hydraulic proportional valve, has electromagnet and valve part joined radially, axially in force-locking and/or shape-locking manner by electromagnet pole shoe |
| EP1158230A2 (en) * | 2000-05-22 | 2001-11-28 | Eaton Corporation | Solenoid operated pressure control valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1596041A3 (en) * | 2004-05-14 | 2008-07-16 | Schaeffler KG | Control valve for a camshaft timing phaser in an internal combustion engine |
| CN104948252A (en) * | 2014-03-28 | 2015-09-30 | 舍弗勒技术股份两合公司 | End-fed engine oil control valve and variable valve timing system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10229912B4 (en) | 2012-12-13 |
| DE10229912A1 (en) | 2004-01-15 |
| AU2003281280A1 (en) | 2004-01-23 |
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