EP0959217A2 - Assembly for hydraulically operating a tailgate - Google Patents

Assembly for hydraulically operating a tailgate Download PDF

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Publication number
EP0959217A2
EP0959217A2 EP99890104A EP99890104A EP0959217A2 EP 0959217 A2 EP0959217 A2 EP 0959217A2 EP 99890104 A EP99890104 A EP 99890104A EP 99890104 A EP99890104 A EP 99890104A EP 0959217 A2 EP0959217 A2 EP 0959217A2
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EP
European Patent Office
Prior art keywords
valve
pressure
working cylinder
line
cover flap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99890104A
Other languages
German (de)
French (fr)
Other versions
EP0959217A3 (en
EP0959217B1 (en
Inventor
Gerhard Huber
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.)
Hoerbiger Hydraulik GmbH
Original Assignee
Hoerbiger Hydraulik GmbH
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Publication date
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Publication of EP0959217A2 publication Critical patent/EP0959217A2/en
Publication of EP0959217A3 publication Critical patent/EP0959217A3/en
Application granted granted Critical
Publication of EP0959217B1 publication Critical patent/EP0959217B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/49—Safety devices, e.g. detection of obstructions or end positions specially adapted for mechanisms operated by fluid pressure, e.g. detection by monitoring transmitted fluid pressure
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
    • E05Y2400/10—Electronic control
    • E05Y2400/32—Position control, detection or monitoring
    • E05Y2400/322—Position control, detection or monitoring by using absolute position sensors
    • E05Y2400/326—Position control, detection or monitoring by using absolute position sensors of the angular type
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2600/00—Mounting or coupling arrangements for elements provided for in this subclass
    • E05Y2600/40—Mounting location; Visibility of the elements
    • E05Y2600/46—Mounting location; Visibility of the elements in or on the wing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Type of wing
    • E05Y2900/546—Tailboards, tailgates or sideboards opening upwards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20561—Type of pump reversible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check valves

Definitions

  • the invention relates to an arrangement for hydraulic actuation of a Rear cover, a cover flap or the like on a vehicle, with at least a double-acting hydraulic working cylinder, on the one hand on the Vehicle and on the other hand is hinged to the cover flap and its Workrooms each with a check valve with one side of each switchable pressure source are connected, the two check valves have a mutual unlocking device and each of the work rooms parallel to the non-return valves via a control valve in the tank Bias valve is kept at a certain pressure level.
  • Such arrangements are known and enable, for example, the automatic actuation of vehicle doors, bonnets, maintenance flaps or also of cover flaps of the trunk or of a folding roof Space.
  • the preload valve enables the cover flap to move in a controlled manner in this state, for example, by hand, such as an emergency closing to allow against a force specified by the preload valve.
  • the object of the present invention is to provide a known arrangement of the Improve the type described above so that the disadvantages described to be avoided and in particular in a simple and safe manner passive pinch protection is implemented.
  • This task is performed in accordance with an arrangement of the type mentioned solved the invention in that in at least one connecting line to Working cylinder opens a line to the tank, in which a proportional pressure valve is used, which of the control electronics according to the Movement of the cover flap or the like.
  • the currently required pressure is controlled.
  • the proportional pressure valve is a component in which the pressure up to which it blocks or from which it blocks is proportional to the driving current.
  • the electronic control now controls depending on the cover angle - the Angle or inclination transducers determined or from their signals in the Control electronics is calculated - the proportional pressure valve with the current the pressure required to open and / or close the Cover flap or the like.
  • the corresponding control curve is preferably determined empirically and in the Control electronics stored. This is an optimal passive protection against trapping achieved, with the different for opening and closing Pressure curves - for example due to the support of the closing movement can be taken into account by the weight of the cover flap or the like.
  • the pressure relief valves required in conventional actuation arrangements can be omitted.
  • the proportional pressure valve designed as a normally closed valve, whereby the desired holding function of the cylinder when operated manually by the two Preload valves is guaranteed.
  • the proportional pressure valve can be open when de-energized Be designed valve, which allows a simpler construction.
  • a connection of the connections the working cylinder is provided via a changeover valve
  • the to Proportional pressure valve leading line attaches to the changeover valve and alternately with the connection of the working cylinder supplied by the pressure source connected is.
  • This can be done in terms of construction and equipment both the retraction and extension of the working cylinder by means of a Proportional pressure valve and possibly a preload valve in the sense of a optimal passive pinch protection can be controlled.
  • the recognizes Control electronics by querying the actuating element of the control or of the sensors provided anyway the direction of movement and selects the associated one saved control curve for the proportional pressure valve to its Power off.
  • FIG. 1 shows a schematic arrangement according to the present Invention in a vehicle
  • Fig. 2 shows a schematic hydraulic Circuit diagram of an arrangement according to the invention
  • FIG. 3 shows one schematic hydraulic circuit diagram of an alternative embodiment.
  • FIG. 1 The arrangement shown in Fig. 1 for hydraulic actuation of a Cover flap, a boot lid or other movable vehicle part 1 on a vehicle 2 has at least one double-acting hydraulic Working cylinder 3 on the one hand on the vehicle 2 and on the other the cover flap 1 is articulated.
  • the workrooms not shown here of the working cylinder 3 are via lines 4, 5 with a hydraulic unit 6 connected, which via a connecting line 7 with the electrical Vehicle 2 electrical system is connected.
  • movable hydraulic unit 6 may require the articulation of the working cylinder 3 on the vehicle and / or cover flap side also indirectly via levers, hinge arrangements or the like take place, the working cylinder 3 also being fixed relative to the vehicle 2 could be mounted.
  • the 2 is the combination of hydraulic unit 6 and Lines 4, 5 connected cylinder 3 shown in more detail.
  • the two working spaces 8, 9 of the working cylinder 3 are via the lines 4, 5 and each with a check valve 10, 11 arranged in the hydraulic unit 6 one side each of a switchable pressure source 12 (formed here Pump including drive motor) in connection.
  • the two check valves 10, 11 are connected via lines 13, 14 and can be unlocked from each other. over one bias valve 15, 16 each, the two working spaces 8, 9 are parallel to the check valves 10, 11 in the tank 17 as soon as an adjustable Pressure levels are reached or exceeded.
  • the preload valves 15, 16 are via lines 18, 19 and the pump side in front of the check valves 10, 11 prevailing pressure can be shut off hydraulically.
  • a connecting line with a changeover valve 21 interposed between the line 4 to the piston-side working space 8 of the working cylinder 3 and the line 5 to the rod-side work space 9 is behind the Check valves 10, 11 a connecting line with a changeover valve 21 interposed.
  • This switching valve 21 alternately connects that of lines 4 or 5 with a line 22, which from the pressure source 12th is supplied with pressure medium. Via the line 22 is the cylinder 3 supplied pressure also at a proportional pressure valve 23. This is executed normally closed in the embodiment of FIG. 2, so that the bias valves 15 and 16 their holding function when the actuator assembly is de-energized meet and the cover flap 1. Like. In the respective position can hold.
  • the function of the arrangement shown is as in FIG. 2 illustrated explained.
  • the Working cylinder 3 When opening or closing hydraulically, the Working cylinder 3 off or on.
  • the motor of the pump of the pressure source 12 is energized, the pump runs and supplies pressure medium via the check valves 10 or 11 in the piston-side working space 8 or the rod-side Working room 9. This is on the same side via lines 18 and 19 such as the bias valve 15 or 16 controlled.
  • the pressure in the work area 8 or 9 can vary up to the value build up at which the proportional pressure valve 23 opens. This pressure is predetermined by the control curve, which is stored in the control electronics.
  • a typical control curve becomes a at the beginning of the opening movement provide higher current so that the extension and overcoming of the initial resistance is accomplished with a higher force.
  • the kinematics too and the leverage ratios are rather disadvantageous at the beginning, so that a higher force is required.
  • the pressure and the force generated by it are only set to a value that is just sufficient to carry out or continue the opening movement in the respective phase can. Unnecessary and in the case of obstacles in the way of the cover flap 1 too Damages or injuries leading to excess power are avoided.
  • the proportional pressure valve less energized.
  • the cover flap 1 (FIG. 1) opens or closes hydraulically up to the stop in the working cylinder 3.
  • the volume of the rod-side working space 9 flows when opened via the hydraulically controlled via line 14
  • the hydraulic system provides counterweight or counterforce on the cover flap 1 overall the force regulated at the proportional pressure valve 23. The pump runs until the cover flap 1 is open and is then switched off.
  • a bias valve 24 is used in the Line 22 between the changeover valve 21 and the proportional pressure valve 23, which is designed to be open when de-energized.
  • This bias valve 24 is via a control line 25 from the pressure source 12 or the pressure prevailing on the side of the check valve 11. This is again - with a relatively simple design of the proportional pressure valve 23 - ensures that the cover flap 1 or the like Actuating arrangement 6 by the at the preset value of Bias valve 24 increasing pressure held in the respective position is.
  • a cover flap 1 according to FIG. 1 could be the inventive arrangement of course also for the actuation of vertical in the closed state
  • Tailgates can be used for example a station wagon or a bus.
  • Other application examples would be e.g. Vehicle doors, maintenance or ventilation flaps and the like.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lock And Its Accessories (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Superstructure Of Vehicle (AREA)

Abstract

One side of the at least one double-acting hydraulic vehicle roof panel operating cylinder (3) is linked to the vehicle, and the other side to the tailgate. Each of the operating chambers parallel with the reflux valves is held by a pre-tensioning valve (15,16) held at a set pressure level. A pipe (22) leading to the tank (17) opens in at least one connecting pipe (4,5) to the operating cylinder and contains a proportional pressure valve (23).

Description

Die Erfindung betrifft eine Anordnung zur hydraulischen Betätigung eines Heckdeckels, einer Abdeckklappe od. dgl. an einem Fahrzeug, mit zumindest einem doppeltwirkenden hydraulischen Arbeitszylinder, der einerseits am Fahrzeug und andererseits an der Abdeckklappe angelenkt ist und dessen Arbeitsräume über je ein Rückschlagventil mit jeweils einer Seite einer umschaltbaren Druckquelle in Verbindung stehen, wobei die beiden Rückschlagventile eine gegenseitige Entsperreinrichtung aufweisen und jeder der Arbeitsräume parallel zu den Rückschlagventilen über ein in den Tank absteuerndes Vorspannventil auf einem bestimmten Druckniveau gehalten ist.The invention relates to an arrangement for hydraulic actuation of a Rear cover, a cover flap or the like on a vehicle, with at least a double-acting hydraulic working cylinder, on the one hand on the Vehicle and on the other hand is hinged to the cover flap and its Workrooms each with a check valve with one side of each switchable pressure source are connected, the two check valves have a mutual unlocking device and each of the work rooms parallel to the non-return valves via a control valve in the tank Bias valve is kept at a certain pressure level.

Derartige Anordnungen sind bekannt und ermöglichen beispielsweise die automatische Betätigung von Fahrzeugtüren, Motorhauben, Wartungsklappen oder auch von Abdeckklappen des Kofferraumes oder eines ein Faltverdeck aufnehmenden Raumes. Durch die gegenseitig entsperrbaren Rückschlagventile wird sichergestellt, daß beim Ausschalten oder Ausfallen des Betriebsdruckes die Abdeckklappe in der jeweiligen Stellung hydraulisch gesperrt stehenbleibt, um unkontrollierte Bewegungen und damit einhergehende Gefahren auszuschalten. Das Vorspannventil ermöglicht eine kontrollierte Weiterbewegung der Abdeckklappe in diesem Zustand beispielsweise von Hand aus, um etwa ein Not-Schließen gegen eine vom Vorspannventil vorgegebene Kraft zu erlauben.Such arrangements are known and enable, for example, the automatic actuation of vehicle doors, bonnets, maintenance flaps or also of cover flaps of the trunk or of a folding roof Space. Through the mutually unlockable check valves ensures that when the operating pressure is switched off or fails, the The cover flap remains locked in the respective position in order to to eliminate uncontrolled movements and the associated dangers. The preload valve enables the cover flap to move in a controlled manner in this state, for example, by hand, such as an emergency closing to allow against a force specified by the preload valve.

Nachteilig bei der angeführten bekannten Anordnung der genannten Art ist aber der Umstand, daß im Fall eines Einklemmens eines Gegenstandes oder eines KKörperteils des Benutzers die Abdeckklappe od. dgl. weiter betätigt wird, bis der sehr hohe Druck - und damit auch sehr hohe Kräfte - des Druckbegrenzungsventils erreicht ist. Dies kann zu ernsthaften Verletzungen oder Beschädigungen führen. Selbst bei für andere hydraulische Systeme an sich bekannten Drucküberwachungseinrichtungen im System, beispielsweise durch Überwachung etwa der Drehzahländerungen der Pumpe od. ähnliches, dgl. dauert es einige Zeit, bis sich der Druckanstieg durch das Einklemmen in einem Druckanstieg an der Meßstelle bemerkbar macht und sich dann in einer Änderung des überwachten Parameters niederschlägt. Während dieser Zeitspanne kann bereits ein Verletzung oder Sachbeschädigung eingetreten sein.A disadvantage of the known arrangement mentioned of the type mentioned but the fact that in the event of an object being jammed or a K body part of the user, the cover flap or the like is actuated further, until the very high pressure - and therefore also very high forces - of the pressure relief valve is reached. This can cause serious injury or damage to lead. Even with those known per se for other hydraulic systems Pressure monitoring devices in the system, for example by monitoring about the speed changes of the pump or the like, etc. It takes some Time until the pressure increase due to the pinching in a pressure increase makes the measuring point noticeable and then changes in the monitored Parameters. During this period, an injury can already occur or property damage has occurred.

Aufgabe der vorliegenden Erfindung ist es, eine bekannte Anordnung der eingangs beschriebenen Art so zu verbessern, daß die beschriebenen Nachteile vermieden werden und daß insbesonders auf einfache und sichere Weise ein passiver Einklemmschutz realisiert ist.The object of the present invention is to provide a known arrangement of the Improve the type described above so that the disadvantages described to be avoided and in particular in a simple and safe manner passive pinch protection is implemented.

Diese Aufgabe wird bei einer Anordnung der eingangs genannten Art gemäß der Erfindung dadurch gelöst, daß daß in zumindest einer Anschlußleitung zum Arbeitszylinder eine Leitung zum Tank mündet, in die ein Proportionaldruckventil eingesetzt ist, welches von der Steuerelektronik entsprechend dem zur Bewegung der Abdeckklappe od. dgl. gerade notwendigen Druck angesteuert wird. Das Proportionaldruckventil ist ein Bauteil, bei dem der Druck, bis zu dem es sperrt oder ab welchem es sperrt, proportional dem ansteuernden Strom ist. Die elektronische Steuerung steuert nun je nach Deckelwinkel - der über Weg-, Winkel- oder Neigungsaufnehmer ermittelt bzw. aus deren Signalen in der Steuerelektronik errechnet wird - das Proportionaldruckventil mit dem Strom an, der gerade dem erforderliche Druck zum Öffnen und/oder Schließen der Abdeckklappe od. dgl. entspricht. Somit wirkt am Zylinder nur der Druck bzw. die Kraft, damit der genannten Bauteil des Fahrzeugs gerade noch schließt bzw. öffnet, es tritt aber kein Überschuß an Kraft auf, wie diese bei herkömmlichen Systemen mit Auslegung auf den maximalen notwendigen Druck in einem großen Bereich des Schwenk- oder Verschiebeweges der Fall ist. Die entsprechende Steuerkurve wird vorzugsweise empirisch ermittelt und in der Steuererlektronik gespeichert. Damit ist ein optimaler passiver Einklemmschutz erreicht, wobei auch die für Öffnen und Schließen unterschiedlichen Druckverläufe - beispielsweise aufgrund der Unterstützung der Schließbewegung durch das Gewicht der Abdeckklappe od. dgl. - berücksichtigt werden können. Die bei herkömmlichen Betätigungsanordnungen notwendigen Druckbegrenzungsventile können dabei entfallen. This task is performed in accordance with an arrangement of the type mentioned solved the invention in that in at least one connecting line to Working cylinder opens a line to the tank, in which a proportional pressure valve is used, which of the control electronics according to the Movement of the cover flap or the like. The currently required pressure is controlled. The proportional pressure valve is a component in which the pressure up to which it blocks or from which it blocks is proportional to the driving current. The electronic control now controls depending on the cover angle - the Angle or inclination transducers determined or from their signals in the Control electronics is calculated - the proportional pressure valve with the current the pressure required to open and / or close the Cover flap or the like. Only the pressure or the force so that the named component of the vehicle just closes or opens, but there is no excess force, like this with conventional Systems designed for the maximum necessary pressure in a large area of the swivel or displacement path is the case. The corresponding control curve is preferably determined empirically and in the Control electronics stored. This is an optimal passive protection against trapping achieved, with the different for opening and closing Pressure curves - for example due to the support of the closing movement can be taken into account by the weight of the cover flap or the like. The pressure relief valves required in conventional actuation arrangements can be omitted.

Gemäß einer Ausführungsform der Erfindung ist das Proportionaldruckventil als stromlos geschlossenes Ventil ausgeführt, wodurch weiterhin die gewünschte Haltefunktion des Zylinders bei Handbetätigung durch die beiden Vorspannventile gewährleistet ist.According to one embodiment of the invention, the proportional pressure valve designed as a normally closed valve, whereby the desired holding function of the cylinder when operated manually by the two Preload valves is guaranteed.

Alternativ dazu kann das Proportionaldruckventil als stromlos offenes Ventil ausgeführt sein, was eine einfachere Bauweise erlaubt.Alternatively, the proportional pressure valve can be open when de-energized Be designed valve, which allows a simpler construction.

Damit jedoch weiterhin die Haltefunktion bei nicht bestromtem Proportionaldruckventil in Richtung des Einfahrens des Arbeitszylinders gegeben ist, kann gemäß einem weiteren Erfindungsmerkmal zwischen dem Arbeitszylinder und dem Proportionaldruckventil ein Vorspannventil eingesetzt sein. Dabei kann das oder jedes andere Vorspannventil entfallen. Wenn für das Einfahren und Ausfahren andere Vorspanndrücke vorgesehen sein sollen, kann das aber durch ein zusätzliches Vorspannventil in einfacher Weise realisiert sein. Damit bei automatischem Betrieb und Anhalten des Deckels durch z.B. den Benutzer kein zusätzlicher Druckabfall am Vorspannventil entsteht, verläuft eine Steuerleitung vom Wechselventil bzw. der Druckquelle zum Vorspannventil in der Leitung, über die es von der Druckmittelquelle aufgesteuert werden kann.However, this continues to hold the function when the proportional pressure valve is not energized in the direction of retracting the working cylinder can according to another feature of the invention between the cylinder and the proportional pressure valve a bias valve. It can the or any other preload valve is eliminated. If for running in and Extending other preload pressures should be provided, but can by an additional preload valve can be implemented in a simple manner. So that with automatic operation and stopping of the cover by e.g. the User no additional pressure drop occurs at the preload valve runs a control line from the shuttle valve or the pressure source to the preload valve in the line over which it can be controlled by the pressure medium source can.

Vorteilhafterweise ist vorgesehen, daß eine Verbindung der Anschlüsse des Arbeitszylinders über ein Umschaltventil vorgesehen ist, wobei die zum Proportionaldruckventil führende Leitung am Umschaltventil ansetzt und wechselweise mit dem von der Druckquelle versorgten Anschluß des Arbeitszylinders verbunden ist. Damit kann in baulich und apparativ einfacher Ausführung sowohl das Ein- als auch das Ausfahren des Arbeitszylinders mittels eines Proportionaldruckventils und allenfalls eines Vorspannventils im Sinne eines optimalen passiven Einklemmschutzes gesteuert werden. Dabei erkennt die Steuerelektronik durch Abfrage des Betätigungselementes der Steuerung bzw. der ohnehin vorgesehenen Sensoren die Bewegungsrichtung und wählt die dazugehörige gespeicherte Steuerkurve für das Proportionaldruckventil zu dessen Bestromung aus.It is advantageously provided that a connection of the connections the working cylinder is provided via a changeover valve, the to Proportional pressure valve leading line attaches to the changeover valve and alternately with the connection of the working cylinder supplied by the pressure source connected is. This can be done in terms of construction and equipment both the retraction and extension of the working cylinder by means of a Proportional pressure valve and possibly a preload valve in the sense of a optimal passive pinch protection can be controlled. The recognizes Control electronics by querying the actuating element of the control or of the sensors provided anyway the direction of movement and selects the associated one saved control curve for the proportional pressure valve to its Power off.

Die Erfindung wird im folgenden noch anhand der Zeichnungen näher erläutert. Fig. 1 zeigt dabei eine schematische Anordnung nach der vorliegenden Erfindung in einem Fahrzeug, Fig. 2 zeigt einen schematischen hydraulischen Schaltplan einer erfindungsgemäßen Anordnung und Fig. 3 zeigt einen schematischen hydraulischen Schaltplan einer alternativen Ausführungsform.The invention will be explained in more detail below with reference to the drawings explained. Fig. 1 shows a schematic arrangement according to the present Invention in a vehicle, Fig. 2 shows a schematic hydraulic Circuit diagram of an arrangement according to the invention and FIG. 3 shows one schematic hydraulic circuit diagram of an alternative embodiment.

Die in Fig. 1 dargestellt Anordnung zur hydraulischen Betätigung einer Abdeckklappe, eines Heckdeckels oder eines sonstigen beweglichen Fahrzeugteils 1 an einem Fahrzeug 2 weist zumindest einen doppeltwirkenden hydraulischen Arbeitszylinder 3 auf, der einerseits am Fahrzeug 2 und andererseits an der Abdeckklappe 1 angelenkt ist. Die hier nicht weiter dargestellten Arbeitsräume des Arbeitszylinders 3 sind über Leitungen 4, 5 mit einem Hydraulikaggregat 6 verbunden, welches über eine Anschlußleitung 7 mit dem elektrischen Bordnetz des Fahrzeuges 2 in Verbindung steht.The arrangement shown in Fig. 1 for hydraulic actuation of a Cover flap, a boot lid or other movable vehicle part 1 on a vehicle 2 has at least one double-acting hydraulic Working cylinder 3 on the one hand on the vehicle 2 and on the other the cover flap 1 is articulated. The workrooms not shown here of the working cylinder 3 are via lines 4, 5 with a hydraulic unit 6 connected, which via a connecting line 7 with the electrical Vehicle 2 electrical system is connected.

Anstelle der beidseitigen direkten Anlenkung des Arbeitszylinders 3, welche natürlich entsprechend bewegliche Leitungen 4, 5 oder ein insgesamt mit dem Arbeitszylinder 3 mitbewegbares Hydraulikaggregat 6 erfordert, könnte die Anlenkung des Arbeitszylinders 3 auf der Fahrzeug- und/oder Abdeckklappenseite auch indirekt über Hebel, Scharnieranordnungen oder dergleichen erfolgen, wobei der Arbeitszylinder 3 auch relativ zum Fahrzeug 2 feststehend montiert sein könnte.Instead of the direct linkage of the working cylinder 3 on both sides, which of course correspondingly movable lines 4, 5 or a total with the power cylinder 3 movable hydraulic unit 6 may require the articulation of the working cylinder 3 on the vehicle and / or cover flap side also indirectly via levers, hinge arrangements or the like take place, the working cylinder 3 also being fixed relative to the vehicle 2 could be mounted.

In der Fig. 2 ist die Kombination von Hydraulikaggregat 6 und über die Leitungen 4, 5 verbundenem Arbeitszylinder 3 detaillierter dargestellt. Die beiden Arbeitsräume 8, 9 des Arbeitszylinders 3 sind über die Leitungen 4, 5 und je ein im Hydraulikaggregat 6 angeordnetes Rückschlagventil 10, 11 mit jeweils einer Seite einer umschaltbaren Druckquelle 12 (hier gebildet aus Pumpe samt Antriebsmotor) in Verbindung. Die beiden Rückschlagventile 10, 11 sind dabei über Leitungen 13, 14 verbunden und gegenseitig entsperrbar. Über je ein Vorspannventil 15, 16 sind die beiden Arbeitsräume 8, 9 parallel zu den Rückschlagventilen 10, 11 in den Tank 17 abgesteuert, sobald ein einstellbares Druckniveaus erreicht oder überschritten wird. Die Vorspannventile 15, 16 sind über Leitungen 18, 19 und den pumpenseitig vor den Rückschlagventilen 10, 11 herrschenden Druck hydraulisch absperrbar.2 is the combination of hydraulic unit 6 and Lines 4, 5 connected cylinder 3 shown in more detail. The two working spaces 8, 9 of the working cylinder 3 are via the lines 4, 5 and each with a check valve 10, 11 arranged in the hydraulic unit 6 one side each of a switchable pressure source 12 (formed here Pump including drive motor) in connection. The two check valves 10, 11 are connected via lines 13, 14 and can be unlocked from each other. over one bias valve 15, 16 each, the two working spaces 8, 9 are parallel to the check valves 10, 11 in the tank 17 as soon as an adjustable Pressure levels are reached or exceeded. The preload valves 15, 16 are via lines 18, 19 and the pump side in front of the check valves 10, 11 prevailing pressure can be shut off hydraulically.

Die in Fig. 1 ersichtliche Anschlußleitung 7, welche in Fig. 2 nicht separat dargestellt ist, steuert den Motor der Pumpe der Druckquelle 12 und ein Wechselventil 20 mit einer zum Tank 17 führenden Leitungen. Weiters könnten über diese Anschlußleitung 7 auch beispielsweise Endschalter oder sonstige Stellungskontrollen Signale zu nicht weiter dargestellten Steuereinheiten oder dergleichen liefern.The connecting line 7 shown in FIG. 1, which is not shown in FIG. 2 Shown separately, controls the motor of the pump of pressure source 12 and a shuttle valve 20 with a line leading to the tank 17. Furthermore could, for example, limit switches or via this connecting line 7 other position controls signals to control units not shown or deliver the like.

Zwischen der Leitung 4 zum kolbenseitigen Arbeitsraum 8 des Arbeitszylinders 3 und der Leitung 5 zum stangenseitigen Arbeitsraum 9 ist hinter den Rückschlagventilen 10, 11 eine Verbindungsleitung mit einem Umschaltventil 21 zwischengeschaltet. Dieses Umschaltventil 21 verbindet abwechselnd diejenige der Leitungen 4 oder 5 mit einer Leitung 22, welche von der Druckquelle 12 mit Druckmedium versorgt wird. Über die Leitung 22 liegt der dem Arbeitszylinder 3 zugeführte Druck auch an einem Proportionaldruckventil 23 an. Dieses ist im Ausführungsbeispiel der Fig. 2 stromlos geschlossen ausgeführt, so daß die Vorspannventile 15 und 16 ihre Haltefunktion bei stromloser Betätigungsanordnung erfüllen und die Abdeckklappe 1 od. dgl. in der jeweiligen Stellung halten können.Between the line 4 to the piston-side working space 8 of the working cylinder 3 and the line 5 to the rod-side work space 9 is behind the Check valves 10, 11 a connecting line with a changeover valve 21 interposed. This switching valve 21 alternately connects that of lines 4 or 5 with a line 22, which from the pressure source 12th is supplied with pressure medium. Via the line 22 is the cylinder 3 supplied pressure also at a proportional pressure valve 23. This is executed normally closed in the embodiment of FIG. 2, so that the bias valves 15 and 16 their holding function when the actuator assembly is de-energized meet and the cover flap 1. Like. In the respective position can hold.

Im folgenden wird die Funktion der dargestellten Anordnung wie in Fig. 2 dargestellt erläutert. Beim hydraulischen Öffnen bzw. Schließen fährt der Arbeitszylinder 3 aus bzw. ein. Der Motor der Pumpe der Druckquelle 12 ist bestromt, die Pumpe läuft und liefert Druckmedium über die Rückschlagventile 10 bzw. 11 in den kolbenseitigen Arbeitsraum 8 bzw. den stangenseitigen Arbeitsraum 9. Über die Leitungen 18 bzw. 19 ist das auf der gleichen Seite wie das jeweils durchströmte Rückschlagventil liegende Vorspannventil 15 oder 16 zugesteuert. Der Druck im Arbeitsraum 8 bzw. 9 kann sich bis auf den Wert aufbauen, bei dem das Proportionaldruckventil 23 öffnet. Dieser Druck ist durch die Steuerkurve vorgegeben, die in der Steuerelektronik abgelegt ist.In the following, the function of the arrangement shown is as in FIG. 2 illustrated explained. When opening or closing hydraulically, the Working cylinder 3 off or on. The motor of the pump of the pressure source 12 is energized, the pump runs and supplies pressure medium via the check valves 10 or 11 in the piston-side working space 8 or the rod-side Working room 9. This is on the same side via lines 18 and 19 such as the bias valve 15 or 16 controlled. The pressure in the work area 8 or 9 can vary up to the value build up at which the proportional pressure valve 23 opens. This pressure is predetermined by the control curve, which is stored in the control electronics.

Eine typische Steuerkurve wird zu Beginn der Öffnungsbewegung eine höhere Bestromung vorsehen, so daß das Ausfahren und Überwinden des Anfangswiderstandes mit einer höheren Kraft bewerkstelligt wird. Auch die Kinematik und die Hebelverhältnisse sind zu Beginn eher unvorteilhaft, so daß eine höhere Kraft erforderlich ist. Der Druck und die dadurch erzeugte Kraft werden aber lediglich auf einen Wert eingestellt, der gerade ausreicht, um die Öffnungsbewegung in der jeweiligen Phase durch- bzw. weiterführen zu können. Unnötige und im Falle von Hindernissen im Weg der Abdeckklappe 1 zu Beschädigungen oder Verletzungen führende Kraftüberschüsse werden vermieden. Sobald die Abdeckklappe in Bewegung ist und auch die Kinematik und die Hebelverhältnisse günstiger sind, wird der Druck und damit auch die Betätigungskraft zurückgeregelt, das Proportionaldruckventil weniger bestromt. Am Ende des Aufschwenkens wird meist die Kinematik wieder ungünstiger, der Einfluß des Gewichts der Abdeckklappe spielt meist eine nur untergeordnet Rolle, da sie sich im wesentlichen in einer labilen Gleichgewichtslage befindet. Der Sperrwert des Proportionaldruckventils für den Druck im System wird daher zwar angehoben, aber nicht auf einen so hohen Wert wie zu Beginn der Bewegung.A typical control curve becomes a at the beginning of the opening movement provide higher current so that the extension and overcoming of the initial resistance is accomplished with a higher force. The kinematics too and the leverage ratios are rather disadvantageous at the beginning, so that a higher force is required. The pressure and the force generated by it are only set to a value that is just sufficient to carry out or continue the opening movement in the respective phase can. Unnecessary and in the case of obstacles in the way of the cover flap 1 too Damages or injuries leading to excess power are avoided. As soon as the cover flap is in motion and also the kinematics and the Leverage ratios are more favorable, the pressure and thus the actuating force regulated back, the proportional pressure valve less energized. At the At the end of swinging open, the kinematics usually become less favorable again The influence of the weight of the cover flap usually plays only a subordinate role Role since they are essentially in an unstable equilibrium position located. The blocking value of the proportional pressure valve for the pressure in the system is therefore raised, but not to a value as high as at the beginning the movement.

Beim Schließen sind sinngemäß die gleichen Verhältnissen in umgekehrter Reihenfolge gegeben, wobei aber zu berücksichtigen ist, daß das Absenken der Abdeckklappe durch deren Gewicht unterstützt wird, so daß das über das Proportionaldruckventil eingestellte Druckniveau noch niedriger sein muß als in der gleichen Stellung des Öffnungsvorganges.When closing, the same conditions are in reverse Order given, but it should be borne in mind that the lowering of the Cover flap is supported by its weight, so that the Proportional pressure valve set pressure level must still be lower than in the same position of the opening process.

Die Abdeckklappe 1 (Fig. 1) öffnet oder schließt hydraulisch bis zum Anschlag im Arbeitszylinder 3. Das Volumen des stangenseitigen Arbeitsraumes 9 fließt beim Öffnen über das über die Leitung 14 hydraulisch aufgesteuerte Rückschlagventil 11 und das Wechselventil 20 in den Tank 16 ab. Je nach Gegengewicht bzw. Gegenkraft an der Abdeckklappe 1 liefert die Hydraulik insgesamt die am Proportionaldruckventil 23 eingeregelte Kraft. Die Pumpe läuft bis die Abdeckklappe 1 geöffnet ist und wird dann abgeschaltet.The cover flap 1 (FIG. 1) opens or closes hydraulically up to the stop in the working cylinder 3. The volume of the rod-side working space 9 flows when opened via the hydraulically controlled via line 14 Check valve 11 and the shuttle valve 20 in the tank 16. Depending on The hydraulic system provides counterweight or counterforce on the cover flap 1 overall the force regulated at the proportional pressure valve 23. The pump runs until the cover flap 1 is open and is then switched off.

Bei der in Fig. 3 dargestellten, weiteren Ausführungsform ist in der Leitung 22 zwischen dem Umschaltventil 21 und dem Proportionaldruckventil 23, welches hier stromlos offen ausgeführt ist, ein Vorspannventil 24 eingesetzt. Dieses Vorspannventil 24 wird über eine Steuerleitung 25 von der Druckquelle 12 bzw. dem auf der Seite des Rückschlagventils 11 herrschenden Druck aufgesteuert. Damit ist wieder - bei relativ einfacher Bauweise des Proportionaldruckventils 23 - gewährleistet, daß die Abdeckklappe 1 od. dgl. bei stromloser Betätigungsanordnung 6 durch den bei auf den voreingestellten Wert des Vorspannventils 24 ansteigenden Druck in der jeweiligen Stellung gehalten ist.In the further embodiment shown in Fig. 3 is in the Line 22 between the changeover valve 21 and the proportional pressure valve 23, which is designed to be open when de-energized, a bias valve 24 is used. This bias valve 24 is via a control line 25 from the pressure source 12 or the pressure prevailing on the side of the check valve 11. This is again - with a relatively simple design of the proportional pressure valve 23 - ensures that the cover flap 1 or the like Actuating arrangement 6 by the at the preset value of Bias valve 24 increasing pressure held in the respective position is.

Abgesehen von der dargestellten und beschriebenen Anordnung und Betätigung einer Abdeckklappe 1 gemäß Fig. 1 (beispielsweise an einem Kofferraum oder der Motorhaube eines PKW) könnte die erfindungsgemäße Anordnung natürlich auch zur Betätigung von im geschlossenen Zustand senkrechten Heckklappen beispielsweise eines Kombi oder eines Busses verwendet werden. Andere Anwendungsbeispiele wären z.B. Fahrzeugtüren, Wartungs- oder Lüftungsklappen und dergleichen mehr.Apart from the arrangement and operation shown and described a cover flap 1 according to FIG. 1 (for example on a trunk or the hood of a car) could be the inventive arrangement of course also for the actuation of vertical in the closed state Tailgates can be used for example a station wagon or a bus. Other application examples would be e.g. Vehicle doors, maintenance or ventilation flaps and the like.

Claims (6)

Anordnung zur hydraulischen Betätigung eines Heckdeckels, einer Abdeckklappe od. dgl. (1) an einem Fahrzeug, mit zumindest einem doppeltwirkenden hydraulischen Arbeitszylinder (3), der einerseits am Fahrzeug und andererseits an der Abdeckklappe angelenkt ist und dessen Arbeitsräume (8, 9) über je ein Rückschlagventil (10, 11) mit jeweils einer Seite einer umschaltbaren Druckquelle (12) in Verbindung stehen, wobei die beiden Rückschlagventile eine gegenseitige Entsperreinrichtung aufweisen und jeder der Arbeitsräume parallel zu den Rückschlagventilen über ein in den Tank absteuerndes Vorspannventil (15, 16) auf einem bestimmten Druckniveau gehalten ist , dadurch gekennzeichnet, daß in zumindest einer Anschlußleitung (4, 5) zum Arbeitszylinder (3) eine Leitung (22) zum Tank (17) mündet, in die ein Proportionaldruckventil (23) eingesetzt ist, welches von der Steuerelektronik entsprechend dem zur Bewegung der Abdeckklappe (1) od. dgl. gerade notwendigen Druck angesteuert wird.Arrangement for the hydraulic actuation of a trunk lid, a cover flap or the like (1) on a vehicle, with at least one double-acting hydraulic working cylinder (3) which is articulated on the one hand on the vehicle and on the other hand on the cover flap and its working spaces (8, 9) One non-return valve (10, 11) each is connected to one side of a switchable pressure source (12), the two non-return valves having a mutual unlocking device and each of the working spaces parallel to the non-return valves via a preload valve (15, 16) that diverts into the tank. is kept at a certain pressure level, characterized in that in at least one connecting line (4, 5) to the working cylinder (3) a line (22) to the tank (17) opens into which a proportional pressure valve (23) is inserted, which from the Control electronics is controlled in accordance with the pressure just required to move the cover flap (1) or the like. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Proportionaldruckventil (23) als stromlos geschlossenes Ventil ausgeführt ist.Arrangement according to claim 1, characterized in that the proportional pressure valve (23) is designed as a normally closed valve. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Proportionaldruckventil (23) als stromlos offenes Ventil ausgeführt ist.Arrangement according to claim 1, characterized in that the proportional pressure valve (23) is designed as a normally open valve. Anordnung nach Anspruch 3, dadurch gekennzeichnet, daß zwischen dem Arbeitszylinder (3) und dem Proportionaldruckventil (23) ein Vorspannventil (24) eingesetzt ist.Arrangement according to claim 3, characterized in that between the Working cylinder (3) and the proportional pressure valve (23) a bias valve (24) is used. Anordnung nach Anspruch 4, dadurch gekennzeichnet, daß eine Steuerleitung (25) vom Wechselventil (20) bzw. der Druckquelle (12) zum Vorspannventil (24) in der Leitung (22) verläuft. Arrangement according to claim 4, characterized in that a control line (25) from the shuttle valve (20) or the pressure source (12) to the preload valve (24) runs in line (22). Anordnung nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Verbindung der Anschlüsse des Arbeitszylinders (3) über ein Umschaltventil (21) vorgesehen ist, wobei die zum Proportionaldruckventil (23) führende Leitung (22) am Umschaltventil (21) ansetzt und wechselweise mit dem von der Druckquelle (12) versorgten Anschluß des Arbeitszylinders (3) verbunden ist.Arrangement according to at least one of the preceding claims, characterized characterized in that a connection of the connections of the working cylinder (3) is provided via a changeover valve (21), with the proportional pressure valve (23) leading line (22) on the changeover valve (21) attaches and alternately with that supplied by the pressure source (12) Connection of the working cylinder (3) is connected.
EP99890104A 1998-05-22 1999-03-24 Assembly for hydraulically operating a tailgate Expired - Lifetime EP0959217B1 (en)

Applications Claiming Priority (2)

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AT0088198A AT405749B (en) 1998-05-22 1998-05-22 ARRANGEMENT FOR HYDRAULICALLY OPERATING A REAR LID
AT88198 1998-05-22

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EP0959217A2 true EP0959217A2 (en) 1999-11-24
EP0959217A3 EP0959217A3 (en) 2002-11-13
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EP (1) EP0959217B1 (en)
JP (1) JP2000120606A (en)
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NL1031722C2 (en) * 2006-04-28 2007-10-30 Actuant Corp Hydraulic operating device for a closing assembly for an opening in a vehicle body.
EP1985854A3 (en) * 2007-04-23 2009-12-16 Hoerbiger Automatisierungstechnik Holding GmbH Pump system
WO2018077330A1 (en) * 2016-10-27 2018-05-03 Schaeffler Technologies AG & Co. KG Hydraulic system having pressure sensor and valve
CN108691850A (en) * 2018-07-03 2018-10-23 武汉海王机电工程技术有限公司 A kind of super-pressure pressure relief system
EP4385861A1 (en) * 2022-12-13 2024-06-19 CNH Industrial America LLC Off-road vehicle with a dual-hinge hood assembly

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AT409521B (en) * 2000-06-06 2002-09-25 Hoerbiger Hydraulik ACTUATING ARRANGEMENT FOR SWIVELING PARTS ON VEHICLES
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004029409A1 (en) * 2004-06-18 2006-01-05 Jungheinrich Ag Pressure-medium-actuated actuating device, in particular for a vehicle steering device
NL1031722C2 (en) * 2006-04-28 2007-10-30 Actuant Corp Hydraulic operating device for a closing assembly for an opening in a vehicle body.
EP1985854A3 (en) * 2007-04-23 2009-12-16 Hoerbiger Automatisierungstechnik Holding GmbH Pump system
WO2018077330A1 (en) * 2016-10-27 2018-05-03 Schaeffler Technologies AG & Co. KG Hydraulic system having pressure sensor and valve
CN108691850A (en) * 2018-07-03 2018-10-23 武汉海王机电工程技术有限公司 A kind of super-pressure pressure relief system
CN108691850B (en) * 2018-07-03 2019-12-24 武汉海王机电工程技术有限公司 Ultrahigh pressure relief system
EP4385861A1 (en) * 2022-12-13 2024-06-19 CNH Industrial America LLC Off-road vehicle with a dual-hinge hood assembly

Also Published As

Publication number Publication date
EP0959217A3 (en) 2002-11-13
ATA88198A (en) 1999-03-15
EP0959217B1 (en) 2004-01-14
US6067021A (en) 2000-05-23
JP2000120606A (en) 2000-04-25
DE59908279D1 (en) 2004-02-19
AT405749B (en) 1999-11-25

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