EP2503086A2 - Drive circuit sub-assembly for a vehicle door - Google Patents

Abstract

The circuit assembly (62) has a hydraulic line branch (18), an opening pipe branch (20), and pressure chambers (14,15) connected to the hydraulic actuators (2,3). An electronic control unit (47) has a position sensor (52) for detecting the position of vehicle door (4) and control logic for controlling the opening and closing of vehicle door. A control signal is output for controlling the rotational speed of electric drive unit (31) of the pump (29), for determining the operating state of the door, and for analyzing the errors of electric drive unit.

Description

TECHNICAL FIELD OF THE INVENTION

The invention relates to a hydraulic drive circuit assembly which serves to open and close at least one vehicle door of a vehicle, for example a bus. The invention also relates to a control unit for such a hydraulic drive circuit assembly.

STATE OF THE ART

Conventional buses are usually equipped with compressed air systems, such as a pneumatic brake system and / or an air suspension system. Consistent with such existing compressed air systems found in the past primarily pneumatic actuators for opening and closing the vehicle doors of the bus use.

DE 10 2006 031 477 B4 The applicant discloses a pneumatic rotary drive for pivoting vehicle doors of a bus. In a housing of the rotary drive, a spindle is rotatable and mounted axially displaceable limited. The spindle passes through the housing, wherein a free, projecting from the housing shaft end is coupled to the pivotable vehicle door. The rotary drive has a double-piston-cylinder unit in which a single piston limits opposing pressure chambers on both end faces. The piston is axially displaceable in the cylinder, but rotatably guided as a result of two guide rods passing through the piston. The piston is also penetrated by a spindle. The spindle is in operative connection with the piston via two opposite the piston mounted and sealed rollers, which on opposite screw threads roll off the spindle. With a displacement of the piston as a result of a change in the pressurization of the pressure chambers thus a rotational movement of the spindle can be caused, which has a pivoting movement of the associated vehicle door result. As a result of the dead weight of the vehicle door takes place here no axial movement of the spindle. In an end position of the piston correlating with the closed position of the vehicle door, the rollers reach a discharge area or stop of the screw flights. Further pressurization of the acting in the direction of this end position pressure chamber thus does not lead to a further relative movement between the spindle and piston. Rather, this further pressurization has a common axial movement of the piston and spindle result, which causes the vehicle door is raised in the closed position of the vehicle door. With this movement of the vehicle door vertically upwards, locking pins of the vehicle door can enter corresponding receptacles of the door frame, whereby the vehicle door is locked, so that the vehicle door can not rattle or flutter while driving. A corresponding vertical lifting movement occurs when, during the closing movement of the vehicle door, the movement of the vehicle door is obstructed, for example by a person blocking the vehicle door. Desirable is a kind of "cushioning", which is intended to cause the speed of movement of the vehicle door is reduced with approach to the end positions. For this purpose, the said patent proposes to reduce or throttle the access cross section of the compressed air to the pressure chambers in the region of the end positions.

DE 10 2010 002 625.5-23 Applicant proposes instead of using a pneumatic or electric actuator for a vehicle door of a bus, a hydraulic adjusting device, by means of which the vehicle door can be acted upon in the opening and closing directions. In the actuator, the generation of a rotational movement of a rotary column of the vehicle door via a drive fixed to the rotary column coupled gear, which meshes with a rack occurs. A movement of the rack in the opening or closing direction is caused by two hydraulic pressure chambers, which act in each case in an end region on the rack in the opening and closing direction. The pressure chambers are fed via hydraulic lines, which are connected to each other via a reversible pump. Depending on the drive direction of the pump thus the hydraulic medium is promoted by a pressure chamber in the other pressure chamber and vice versa, which is associated with an opening and closing movement of the vehicle door. In addition to the mentioned rotational degree of freedom of the gear and the rotary column about an axis of rotation, the drive elements of the vehicle door also have a translatory degree of freedom in the direction of the axis of rotation with a lifting movement to allow lifting of the rotary column with vehicle door for the purpose of locking the vehicle door. For the generation of the locking stroke movement, a further stroke-piston-cylinder unit is provided, which acts with hydraulic bias opposite to the weight of the rotary column and the vehicle door in the stroke direction. The pressure chamber of the stroke-piston-cylinder unit acting in the stroke direction is hydraulically coupled to the pressure chamber acting in the closing direction via a check valve which opens in the direction of the pressure chamber of the stroke-piston-cylinder unit. The opening pressure of the check valve is adjusted so that for small pressures in the pressure chamber away from the closed end position, the check valve maintains its blocking position, while reaching the closed position and increasing pressure in the closing direction acting pressure chamber and the associated closing line branch opens the check valve. Hereby, the generation of the rotational movement by the pressure chamber on the one hand and the generation of the lifting movement on the other hand are separated in time, so that the lifting movement is initiated only after reaching the closed position. The same applies to the connection of the pressure chamber of the stroke-piston-cylinder unit via another check valve with a pressure sink to bring about unlocking before the generation of the opening movement: starting from the locked closed position, the check valve is only unlocked to a discharge of the hydraulic fluid allow the pressure space of the stroke-piston-cylinder unit, when the pressure in the pressure chamber acting in the opening direction has reached a pressure level which is higher than the usual pressure level for the movement of the vehicle door in the direction of opening for released locking.

Other operated with a pressure medium actuators for vehicle doors, in particular swing door, are off DE 27 27 506 C3 and EP 0 279 237 B2 known.

AT 409 521 B discloses a hydraulic drive circuit assembly having a double-acting, two oppositely-acting pressure chambers having hydraulic cylinder, whose actuating movement is coupled to a pivotable vehicle door. An admission of the pressure chambers via an opening line branch and a closing line branch, which are fed by a reversible with respect to the conveying direction pump. Linear displacement sensors on the hydraulic cylinder or rotation sensors on an axis of rotation of the vehicle door can monitor the movement of the vehicle door. Furthermore, the pressure of the hydraulic medium in the drive circuit assembly is monitored by pressure sensors. By means of this monitoring is then signaled reaching an end position become. In addition, a pinch protection or a collision protection during the normally unhindered pivoting movement should be realized. Between the pressure chambers of the hydraulic cylinder, a proportional holding valve is used, the opening pressure is adjustable via a control unit. If the proportional holding valve assumes a closed position, the vehicle door can be automatically actuated by alternately supplying the oppositely acting pressure chambers of the hydraulic cylinder. By contrast, can be done by opening the proportional holding valve, a freely flow through connection between the two pressure chambers, which allows sliding over the hydraulic medium without pump power and thus manual movement of the vehicle door. Here, the opening pressure of the proportional holding valve can be designed according to the maximum weight load in the most unfavorable vehicle position, so that upon further pressure excess, for example, when the vehicle door hits an obstacle, the proportional holding valve opens, bringing (corresponding to a mechanically fixed pressure relief valve) Simple anti-trap protection and damage protection is realized. In addition, the document proposes that a vehicle inclination is detected by a sensor or a sensor detects the movement of the vehicle door, wherein a variable along the continuous path torque curve on the vehicle door can be taken into account, resulting from the changing leverage and the kinematics of the suspension the vehicle door results. Via a control signal of a control unit, the opening pressure of the proportional holding valve can be adjusted so that an actuation of the vehicle door always with the same, the movement causing force, resulting in a constant and possibly limited to a minimum pinching force. The document also suggests using pressure sensors and / or a position transducer to detect a manual train or pressure on the vehicle door. About a control unit, the pressure level in the pressure chambers is then set so that a maximum working pressure results, which is not sufficient for actuating the vehicle door by the hydraulic cylinder, but very well supports its manual operation with variable in each position and position of the vehicle door. The user can then manually move the vehicle door in each position of the vehicle door with a constant force, which is for example an advantage in a parked near the vehicle other vehicle that could be damaged by automatic operation of the door.

Further prior art is out AT 409 656 B known.

OBJECT OF THE INVENTION

• der Betriebssicherheit,
• der Gewährleistung von vorgegebenen Stellungen der Fahrzeugtür,
• des Öffnungs- und Schließverlaufs,
• der Öffnungs- und Schließkräfte,
• der Komplexität des Aufbaus,
• des Montageaufwandes und des Aufwandes an Sensoren und/oder
• der Erkennung von Störungen oder Notfallsituationen

verbesserte hydraulische Antriebskreis-Baugruppe zum Öffnen und Schließen mindestens einer Fahrzeugtür, beispielsweise eines Omnibusses, vorzuschlagen.The present invention is based on the object, in particular with regard to

• the operational safety,
• the guarantee of predetermined positions of the vehicle door,
• the opening and closing process,
• the opening and closing forces,
• the complexity of the structure,
• the installation effort and the cost of sensors and / or
• the detection of disturbances or emergency situations

improved hydraulic drive circuit assembly for opening and closing at least one vehicle door, such as a bus to propose.

SOLUTION

The object of the invention is achieved with the features of independent claim 1. Further embodiments of this solution will become apparent according to the dependent claims 2 to 16.

DESCRIPTION OF THE INVENTION

According to the invention, instead of a purely electrical drive circuit or a pneumatic drive circuit, a drive circuit assembly is used, which is operated hydraulically. Compared to a pneumatic actuator, another opening and closing behavior of the vehicle door can be achieved with a hydraulic actuator. The problem with pneumatic actuators, for example, the resilient properties of the pneumatic medium, which can lead to an exclusively pneumatically secured position of the vehicle door, such as the closed position, is left in acting forces under elastic loading of the pneumatic medium in an undesirable manner. This has the consequence, in particular, that the vehicle door with hydraulic actuator has a reduced tendency to rattle or flutter while driving. While still possible that with the inventive hydraulic Drive circuit assembly continues to lock the vehicle door is, with the use of the hydraulic drive circuit assembly may even allow that on a locking of the vehicle door, which is structurally complex, is completely omitted, while securing the closed position by the hydraulic medium and the hydraulic Actuator takes place.

According to the invention, the hydraulic drive circuit assembly has at least one hydraulic line branch, which is connectable or connected to a pressure chamber of a hydraulic actuator. When this hydraulic actuator is acted upon, the vehicle door can be acted upon in the opening or closing direction. Any configurations of the at least one actuator are possible within the scope of the present invention. For example, only one actuator can only be equipped with a pressure chamber which operates against a spring, so that the movement of the actuator not generated by pressurization of the actuator is caused by the spring. Preferably, however, find two line branches with associated pressure chambers of an actuator use, which are then responsible for the generation of forces and / or movements in the opening and closing direction with pressurization. In this case, actuators with the pressure chambers for the two mentioned directions can be formed separately from each other. Preferably, however, double-acting actuators find use, resulting in a particularly compact design.

The hydraulic drive circuit assembly according to the invention has an electronic control unit. The electronic control unit has a control output. About the control output, the speed of the electric drive unit is controlled, which thus also a control of the flow rate or the delivery flow rate of the pump and a control of the hydraulic actuation of at least one line branch, preferably both the opening line branch and the Schließleitungszweigs occurs. Ultimately, so done via the control input and the regulation of the opening and closing behavior of the vehicle door.

In addition, the electronic control unit of the hydraulic drive circuit assembly according to the invention has two input terminals, which may each be formed separately or as a combined connection, the external interface of the hydraulic drive circuit assembly can form or can be designed as an internal connection of the control unit in the interior of the drive circuit assembly.

An input terminal of the electronic control unit can be connected or connected to a position sensor which detects directly or indirectly the position of the vehicle door or a drive element coupled to the vehicle door. In this case, the patented "position sensor" includes any sensor that detects binary, digital or analog a position of the vehicle door. To name just a few non-limiting examples, the position sensor may be a limit switch, a rotation angle sensor, a displacement sensor, or the like.

The other input terminal of the electronic control unit, a signal is supplied, which corresponds to the electrical loading of the electric drive unit of the pump. This electrical impingement is, for example, a current of the electric drive unit, a voltage or an electrical power consumption of the electric drive unit or a variable correlating therewith. This refinement is based on the finding that the electrical actuation of the electric drive unit is dependent not only on the control signal at the control output of the electronic control unit, via which the control of the rotational speed of the electric drive unit takes place. Rather, the electrical loading of the electric drive unit of the pump changes depending on the operating state of the hydraulic drive circuit assembly. To name just one example, a higher output side pressure of the pump, so for example a higher pressure in the opening line branch and / or in the Schließleitungszweig, for the same speed of the electric drive unit requires a higher electrical load than is the case for a smaller output side pressure the pump. Thus, according to the invention, the electrical charging can be used as an auxiliary variable or indicator for the output-side pressure of the pump, that is also the pressure in an opening line branch, a closing line branch or a pressure chamber. Without this being absolutely the case, even a pressure sensor can be dispensed with by the design according to the invention in the hydraulic drive circuit assembly.

According to the invention, the control unit is equipped with control logic or programmed in such a way that it generates a control signal at the control output. This control signal can for Control of the electrical loading of the drive unit of the pump or directly to the electrical impingement and thus to control the hydraulic actuation of the at least one hydraulic line branch, preferably of both hydraulic line branches used. Here, the embodiment of the invention exploits the knowledge that it is not sufficient for optimum operation of the hydraulic drive circuit assembly when the control unit controls the electrical loading of the drive unit of the pump and thus the hydraulic actuation only on the basis of the signal of the position sensor. However, it has also been found that it is just as insufficient to regulate the hydraulic charging only on the basis of the signal of a pressure sensor (or the electrical charging of the electric drive unit). Rather, the invention has recognized that an improved control is only possible if the control logic of the control unit processes both the signal of the position sensor of the vehicle door and the signal of the electrical impingement of the electric drive unit, which correlates with the pressure. There are many possibilities for the type of processing of these two signals. To mention just a few examples, the control unit in selected operating situations, the signal of the position sensor for controlling the drive speed and in other operating situations, the signal of the electrical actuation of the drive unit for the control of the drive speed of the drive assembly and / or for a control of the drive speed of the drive unit use both signals in the same operating situation and from these together generate the control signal for the drive speed. Another example of an embodiment of the invention may consist in that in principle the control of the drive speed based on one of said signals, while monitoring the other signal to monitor the proper operation of the hydraulic drive circuit assembly to generate an error display and / or, if necessary, initiate an emergency mode of operation of the hydraulic drive circuit assembly.

In a further embodiment of the invention, the control unit has an additional input terminal which is connectable or connected to a pressure sensor. This pressure sensor can be used to detect the pressure in one of the pressure chambers or a differential pressure between the pressure chambers, the pressure sensor also binary, in particular as a pressure switch with a switch at a predetermined threshold, digital or analog can work. In this case, the pressure in the pressure chamber can be measured directly via the pressure sensor or indirectly, for example by measuring a pressure in a line branch to the pressure chamber, be measured. For this embodiment of the invention, the control signal at the control output of the control unit for controlling the rotational speed of the electric drive unit is additionally made dependent on the signal of the pressure sensor, whereby, for example, a redundant or more accurate detection of the operating situation allows monitoring of operating positions of valves within the drive circuit -Building and the like can be done.

In a further embodiment of the invention, an opening line branch is present in the hydraulic drive circuit assembly. At this opening line branch acting in the opening direction of the pressure chamber can be connected or connected. Furthermore, a closing line branch is present, to which a pressure chamber acting in the closing direction can be connected or connected. It is understood that an opening line branch and / or a closing line branch for the hydraulic admission of several pressure chambers, which are assigned to different vehicle doors, may be responsible.

It is entirely possible that the pressure conditions in the opening line branch and the closing line branch can be changed via different pressure sources and pressure sinks. However, it is also possible that only one pressure source, in particular a pump which always operates in a conveying direction, is used, which can pressurize the opening line branch or the closing line branch with hydraulic fluid via a switchable valve device, while the other pressure chamber is connected to a pressure sink. In a preferred embodiment of the invention, however, a pump is interposed or interposed between the opening line branch and the closing line branch. The control unit generates at the control input a control signal by means of which the pump is switchable from a promotion in an opening direction in a promotion in a closing direction and vice versa. This represents a particularly simple but efficient embodiment of the supply of the hydraulic drive circuit assembly with the pressurized hydraulic fluid.

In a further embodiment of the invention, the hydraulic actuation of at least one line branch is regulated by a change in the drive speed of the electric drive unit of the pump. In this case, the control unit can control different discrete values for the drive speed, in particular two, three or four different ones Drive speeds. It is understood that a continuous modulation of a drive speed of the electric drive unit of the pump can be done.

It is possible that only one line branch, so the opening line branch or the closing line branch or the associated pressure chambers, a pressure sensor is assigned, which is also possible that both in the opening line branch and in the closing line branch in each case a pressure sensor is present. For a particular embodiment of the invention, however, the detection of the pressure can take place both in the opening line branch and in the closing line branch, although only one pressure sensor is used: For this embodiment, a valve is interposed or interposed between the opening line branch and the closing line branch. This valve connects the pressure sensor with the opening line branch or the closing line branch, depending on the operating state or hydraulic loading of the opening line branch and / or the closing line branch. In this case, such a valve can be switched, for example, as a function of the pressure in said line branches. It is also possible that the valve is electrically switched in response to a control signal of the control unit. To mention only one possible example here, the control unit can control the valve so that the valve, depending on the direction of the reversible pump, which is interposed between the line branches, connects one of said line branches to the pressure sensor.

A particularly simple embodiment of this solution is obtained when the valve is designed as a shuttle valve, which has two inputs and one output. Here, according to the invention, a first input of the shuttle valve is connected to the opening line branch, while a second input of the shuttle valve is connected to the closing line branch. The outlet of the shuttle valve is then connected to the pressure sensor. The shuttle valve connects in a particularly simple way the output to the input whose pressure is just greater than the pressure at the other input. This can be reliably ensured without additional control measures of the control unit.

In a possible embodiment of the invention, the pressure in the pressure chambers and the line branches is secured, for example via check valves, if no change in the position of the vehicle door is desired. Nevertheless, even if the electrical components of the hydraulic drive circuit fail, a manual emergency operation must be possible in order to always be able to ensure that the vehicle door is closed, but in particular can also be opened. This can be ensured in one embodiment of the invention, in which a manually operable manual valve is present. The manual valve connects in a manually induced Notbetätigungsstellung the opening line branch with the Schließleitungszweig to cancel the aforementioned pressure relief. If then manual forces applied to the vehicle door, these forces push the hydraulic fluid from a pressure chamber via the associated line branches and the manual valve in the other pressure chamber, which can be manually caused an opening and closing movement. The opening and closing forces to be applied manually for the manual movement of the vehicle door with manual transfer of the manual control valve in the emergency actuation position depend on the hydraulic properties of the hydraulic fluid and the dimensioning of the hydraulic components and the line cross sections. With greater throttling action for the movement of the fluid between the two mentioned pressure chambers, the force to be applied manually to the vehicle door for opening and closing increases.

In a further embodiment of the hydraulic drive circuit assembly according to the invention, the pressure in the opening line branch and / or the pressure in the closing line branch via a releasable check valve, in particular a pilot-operated check valve, secured. While, for example, an electrically controlled by the control unit or electro-hydraulically piloted unlocking the check valve is encompassed by the present invention, preferably an automatic unlocking of the check valve or check valve in response to a pressure in the opening line branch or closing line branch, wherein in the simplest case, a hydraulic release occurs when a threshold value of the pressure in said line branch is exceeded.

While it is quite possible that the hydraulic drive circuit assembly has only terminals which can be coupled to the input and output of a reversible pump, in a further embodiment of the invention in the drive circuit assembly, a pump is integrated, which depending on the applied control signal to the control output the electronic control unit is reversible.

Another aspect of the invention is devoted to the structural design of the position sensor. For this proposal of the invention, the position sensor with a corresponding to the rotation of a rotary column of the vehicle door actuated potentiometer is formed. in this connection the potentiometer itself may be part of the hydraulic drive circuit assembly according to the invention. It is also possible that an output signal of such a position sensor is supplied to an electrical connection of the electronic control unit. It is also conceivable that the actuator is connected via suitable lines and connections to the hydraulic drive circuit assembly. In one embodiment of the invention, however, the actuator is an integral part of the drive circuit assembly according to the invention.

• Für eine Ausgestaltung berücksichtigt die Steuerlogik für die Regelung auch das Ausgangssignal des Stellungssensors.
  • Hierbei kann die Antriebsdrehzahl verringert werden wenn das Ausgangssignal des Stellungssensors indiziert, dass eine Annäherung der Fahrzeugtür an eine Endlage der Fahrzeugtür erfolgt, um zu vermeiden, dass die Fahrzeugtür mit voller Geschwindigkeit in der Endlage an einem Fahrzeugrahmen u. ä. anschlägt.
  • Alternativ oder zusätzlich kann die Antriebsdrehzahl auf Null reduziert werden, wenn eine Endlage der Fahrzeugtür erreicht ist.
  • Ebenfalls möglich ist, dass die Steuerlogik derart ausgebildet ist, dass die Antriebsdrehzahl in Abhängigkeit von dem Ausgangssignal des Stellungssensors, also letztendlich in Abhängigkeit von der Stellung der Fahrzeugtür, geregelt wird.
  • Alternativ oder kumulativ ist es auch möglich, dass eine übliche konstante oder veränderliche Antriebsdrehzahl für einen Normalbetrieb in eine Defekt-Antriebsdrehzahl geändert wird mit veränderten Druckverhältnissen oder veränderten Volumenstrom-Verläufen. Dies kann automatisiert eingeleitet werden, wenn das Ausgangssignal des Stellungssensors indiziert, dass die Stellung der Fahrzeugtür außerhalb einer Endlage ist, aber ein Geschwindigkeitssignal für eine Stellungsänderung der Fahrzeugtür einen Schwellenwert unterschreitet oder einen Nulldurchgang hat. Das Geschwindigkeitssignal der Stellungsänderung der Fahrzeugtür kann über einen separaten Sensor erfasst werden. Ebenfalls möglich ist, dass dieses aus der ersten zeitlichen Ableitung des Ausgangssignals des Stellungssensors erzeugt wird. Letztendlich wird mit den letztgenannten Auswerteschritten ausgewertet, ob die Fahrzeugtür die Öffnungs- oder Schließgeschwindigkeit verringert, obwohl die Fahrzeugtür keine Endlage erreicht hat. Dieses kann als Indiz gewertet werden, dass eine Person in der Fahrzeugtür eingeklemmt ist oder ein anderweitiges Hindernis im Antrieb der Fahrzeugtür oder im Bewegungsbereich der Fahrzeugtür die Öffnungs- oder Schließbewegung behindert.
• Für eine weitere Ausgestaltung der Steuerlogik erfolgt die Regelung der Antriebsdrehzahl auch in Abhängigkeit des Ausgangssignals eines Drucksensors.
  • Möglich ist hierbei, dass mit einem Druckabfall in mindestens einem Leitungszweig auf einen Defekt geschlossen wird, beispielsweise eine Leckage einer hydraulischen Leitung, die den Druckabfall verursacht. Beispielsweise kann durch die Steuerlogik der Druck mit einem Schwellenwert verglichen werden und mit Unterschreiten des Schwellenwerts auf den Defekt geschlossen werden. Bei einem derartigen erkannten Defekt kann eine Federmeldung in Form eines akustischen oder optischen Signals für den Bediener oder Fahrer erzeugt werden. Ebenfalls kann eine veränderte Betriebsweise der hydraulischen Antriebskreis-Baugruppe erfolgen, insbesondere eine Reduzierung der Antriebsdrehzahl oder eine Abschaltung einer Pumpe erfolgen. Möglich ist auch, dass in diesem Fall eine automatische Verbindung zwischen dem Öffnungsleitungszweig und dem Schließleitungszweig erfolgt, um zumindest eine manuelle Öffnung oder Schließung der Fahrzeugtür noch zu ermöglichen.
  • Für eine weitere Ausgestaltung der Erfindung wird ein Druckanstieg durch die Steuerlogik überwacht. Ein derartiger Druckanstieg kann als Indiz dafür ausgewertet werden, ob ein Widerstand für die Bewegung der Fahrzeugtür vorhanden ist oder eine Person durch die Fahrzeugtür eingeklemmt wird. Auch hier kann für die einfachste Ausgestaltung dieses Gedankens mittels der Regeleinheit und der Steuerlogik überwacht werden, ob ein Druckanstieg über einen Schwellenwert erfolgt.
• Für eine weitere Ausgestaltung der Steuerlogik erfolgt die Regelung der Antriebsdrehzahl des elektrischen Antriebsaggregats der Pumpe in Abhängigkeit des Signals an dem Eingangsanschluss, welches der elektrischen Beaufschlagung des Antriebsaggregates der Pumpe entspricht. Hierbei wird anstelle der Auswertung eines Druckabfalls oder eines Druckanstieges wie zuvor beschrieben das Signal für die elektrische Beaufschlagung des Antriebsaggregates entsprechend genutzt.
• Für eine weitere Ausgestaltung der Steuerlogik erfolgt die Regelung der Antriebsdrehzahl sowohl in Abhängigkeit des Ausgangssignals des Stellungssensors als auch in Abhängigkeit des Signals an dem Eingangsanschluss, welches der elektrischen Beaufschlagung des Antriebsaggregates der Pumpe entspricht. Stellt beispielsweise die Steuerlogik eine erhöhte elektrische Beaufschlagung des Antriebsaggregates der Pumpe fest, während gleichzeitig ein Ausgangssignal des Stellungssensors vorliegt, welches indiziert, dass sich die Fahrertür nicht in einer Endlage befindet, so wertet die Steuerlogik dies als Indiz dafür aus, dass ein Einklemmen einer Person erfolgt oder die Fahrertür an ein Hindernis anstößt oder der Antriebsmechanismus anderweitig blockiert ist. Wird hingegen eine verringerte elektrische Beaufschlagung des Antriebsaggregates der Pumpe festgestellt, während gleichzeitig ein Ausgangssignal des Stellungssensors vorliegt, welches indiziert, dass sich die Fahrertür noch nicht in einer Endlage befindet, kann auf eine Leckage oder einen anderweitigen entsprechenden Defekt geschlossen werden. Somit kann erfindungsgemäß in den beiden genannten Betriebssituationen unterschieden werden, ob ein Anstieg der elektrischen Beaufschlagung des Antriebsaggregates darauf zurückzuführen ist, dass die Fahrzeugtür eine Endlage erreicht hat oder aber die Fahrzeugtür abseits der Endlage blockiert ist, was bei alleiniger Auswertung eines Signals eines Drucksensors nicht möglich wäre. Möglich ist, dass die genannten Betriebssituationen dann über die Regeleinheit genutzt werden, um automatisiert entsprechende geeignete Maßnahmen einzuleiten, beispielsweise ein erneutes Öffnen oder Schließen der Tür, die Erzeugung eines optischen oder akustischen Warnsignals o. ä.
• Für eine besondere Ausgestaltung der Erfindung ist die Steuerlogik der elektronischen Regeleinheit geeignet ausgestaltet, um in Abhängigkeit des Signals an dem Eingangsanschluss, welches der elektrischen Beaufschlagung des Antriebsaggregates der Pumpe entspricht, eine Kalibrierung eines Drucksensors und/oder eine Funktionsprüfung eines Drucksensors durchzuführen. Um lediglich nicht beschränkendes Beispiel zu nennen, kann bei bekanntem maximalen ausgangsseitigem Druck der Pumpe maximaler Druck in der Antriebskreis-Baugruppe aufgebaut werden. Das dann vorliegende Signal des Drucksensors kann mit bekanntem Maximaldruck der Pumpe zur Kalibrierung eingesetzt werden. Es versteht sich, dass auch komplexere Druckverläufe zur Kalibrierung herangezogen werden können. Beispielsweise kann mit einem Befüllen der Antriebskreis-Baugruppe, unter Umständen auch bei einer Erstinbetriebnahme, ein Druckanstieg in bekannter Abhängigkeit von der Zeit zur Kalibrierung des Drucksensors verwendet werden. Darüber hinaus kann die Funktionsprüfung eines Drucksensors dadurch erfolgen, dass beispielsweise mittels der Überwachung der elektrischen Beaufschlagung des Antriebsaggregates der Pumpe detektiert wird, dass in der Antriebskreis-Baugruppe Druck vorhanden ist, während dann bei ausbleibendem Signal des Drucksensors darauf geschlossen werden kann, dass der Drucksensor defekt ist.

Further embodiments of the inventions are devoted to the design of the control logic implemented in the electronic control unit in order to regulate the drive speed of the electric drive unit:

• For one embodiment, the control logic for the control also takes into account the output signal of the position sensor.
  • In this case, the input rotational speed can be reduced if the output signal of the position sensor indicates that the vehicle door is approaching an end position of the vehicle door in order to prevent the vehicle door from being brought to full speed in the end position on a vehicle frame and the like. Ä. strikes.
  • Alternatively or additionally, the drive speed can be reduced to zero when an end position of the vehicle door is reached.
  • It is also possible that the control logic is designed such that the drive speed in response to the output signal of the position sensor, ie ultimately in response to the position of the vehicle door is controlled.
  • Alternatively or cumulatively, it is also possible that a normal constant or variable drive speed is changed for normal operation in a defect drive speed with changed pressure conditions or changed flow rates. This can be initiated automatically if the output signal of the position sensor indicates that the position of the vehicle door is outside an end position, but a speed signal for a change in position of the vehicle door is below a threshold value or has a zero crossing. The speed signal The position change of the vehicle door can be detected by a separate sensor. It is also possible that this is generated from the first time derivative of the output signal of the position sensor. Finally, it is evaluated with the latter evaluation steps, whether the vehicle door reduces the opening or closing speed, although the vehicle door has reached no end position. This can be interpreted as an indication that a person is trapped in the vehicle door or another obstacle in the drive of the vehicle door or in the range of motion of the vehicle door obstructs the opening or closing movement.
• For a further embodiment of the control logic, the control of the drive speed also takes place as a function of the output signal of a pressure sensor.
  • It is possible here that is concluded with a pressure drop in at least one line branch on a defect, such as a leakage of a hydraulic line, which causes the pressure drop. For example, the control logic can be used to compare the pressure with a threshold value and conclude the defect below the threshold value. In such a detected defect, a spring message may be generated in the form of an audible or visual signal to the operator or driver. Likewise, a modified mode of operation of the hydraulic drive circuit assembly can take place, in particular a reduction of the drive speed or a switch-off of a pump. It is also possible that in this case an automatic connection between the opening line branch and the closing line branch takes place in order to allow at least one manual opening or closing of the vehicle door.
  • For a further embodiment of the invention, a pressure increase is monitored by the control logic. Such a pressure increase can be evaluated as an indication of whether a resistance to the movement of the vehicle door is present or a person is trapped by the vehicle door. Again, for the simplest embodiment of this idea can be monitored by means of the control unit and the control logic, whether a pressure increase over a threshold occurs.
• For a further embodiment of the control logic, the control of the drive speed of the electric drive unit of the pump takes place as a function of the signal at the input connection, which corresponds to the electrical loading of the drive unit of the pump. Here, instead of the evaluation of a pressure drop or a pressure increase as described above, the signal for the electrical charging of the drive unit is used accordingly.
• For a further embodiment of the control logic, the control of the drive speed takes place both as a function of the output signal of the position sensor and as a function of the signal at the input terminal, which corresponds to the electrical impingement of the drive unit of the pump. For example, if the control logic detects an increased electrical loading of the drive unit of the pump while an output signal of the position sensor is present, indicating that the driver's door is not in an end position, the control logic evaluates this as an indication that a pinching a person takes place or the driver's door to an obstacle abuts or the drive mechanism is otherwise blocked. If, however, a reduced electrical impingement of the drive unit of the pump is detected, while at the same time an output signal of the position sensor is present, which indicates that the driver's door is not yet in an end position, a leakage or any other corresponding defect can be concluded. Thus, according to the invention can be distinguished in the two mentioned operating situations, whether an increase in the electrical impingement of the drive unit is due to the fact that the vehicle door has reached an end position or the vehicle door is blocked off the end position, which is not possible with sole evaluation of a signal from a pressure sensor would. It is possible that the said operating situations are then used via the control unit to automatically initiate appropriate appropriate measures, such as reopening or closing the door, the generation of an optical or audible warning o. Ä.
• For a particular embodiment of the invention, the control logic of the electronic control unit is suitably configured to perform a calibration of a pressure sensor and / or a functional test of a pressure sensor in response to the signal at the input terminal, which corresponds to the electrical loading of the drive unit of the pump. For example, to name a non-limiting example, maximum pressure in the drive circuit assembly may be established at known maximum output pressure of the pump. The then present signal of the pressure sensor can be used with known maximum pressure of the pump for calibration. It is understood that too more complex pressure curves can be used for the calibration. For example, with a filling of the drive circuit assembly, under certain circumstances, even during a first commissioning, a pressure increase in known dependence on the time to calibrate the pressure sensor can be used. In addition, the functional test of a pressure sensor can take place in that, for example by means of monitoring the electrical impingement of the drive unit of the pump is detected that in the drive circuit assembly pressure is present, then it can be concluded in the absence of signal of the pressure sensor that the pressure sensor is defective.

Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and of combinations of several features mentioned in the introduction to the description are merely exemplary and can come into effect alternatively or cumulatively, without the advantages having to be achieved by embodiments according to the invention. Further features are the drawings - in particular the illustrated geometries and the relative dimensions of several components to each other and their relative arrangement and operative connection - refer. The combination of features of different embodiments of the invention or of features of different claims is also possible deviating from the chosen relationships of the claims and is hereby stimulated. This also applies to those features which are shown in separate drawings or are mentioned in their description. These features can also be combined with features of different claims. Likewise, in the claims listed features for further embodiments of the invention can be omitted.

BRIEF DESCRIPTION OF THE FIGURES

In the following, the invention will be further explained and described with reference to a preferred embodiment shown in the figure. The single FIGURE shows a hydraulic drive circuit for a vehicle door of a bus with a drive circuit assembly according to the invention in a schematic representation.

DESCRIPTION OF THE FIGURES

The single FIGURE shows a hydraulic drive circuit 1 with two jointly supplied hydraulic double-acting actuators 2, 3 for two vehicle doors 4, 5, here vehicle door leaf. The vehicle door 4 (vehicle door 5) has a closed position 6 (closed position 7) and an open position 8 (open position 9), between which the vehicle doors 4, 5 in an opening direction 10 and a closing direction 11 are movable. The actuators 2, 3 are coupled via a suitable drive connection with the vehicle doors 4, 5. For the illustrated embodiment, the drive connection has a rotatable with the movement in the opening direction 10 and closing direction 11 drive shaft 12 or rotary column, according to the drive connection according to DE 10 2010 002 625.5 is coupled to a non-rotatable gear (not shown) which meshes with a rack 13. The rack 13 is in Fig. 1 guided horizontally for a movement in the opening direction 10 and closing direction 11. This movement is generated by the hydraulic actuation of a pressure chamber 14 which acts in the closing direction 11, and a pressure chamber 15 which acts in the opening direction 10. The pressure chambers 14, 15 are respectively bounded by a piston 16 which is formed by an end portion of the rack 13 or is coupled thereto, as well as a cylinder unit 17. For the illustrated embodiment, the actuators 2, 3 each as a double-acting piston-cylinder Units without this having to be the case.

The force acting in the closing direction of the pressure chambers 14 are hydraulically fed from a closing line branch 18, which is divided at a branch 19 on closing line branch parts 18a, 18b to the pressure chambers 14 of the two actuators 2, 3. Accordingly, the pressure chambers 15 of the actuators 2, 3 acted upon hydraulically an opening line branch 20, which opens via a branch 21 in opening line branch parts 20a, 20b.

The opening line branch 20 and the closing line branch 18 can be connected via a manually actuable manual actuation valve 22. For the illustrated embodiment, the manual valve 22 is formed as a 2/2-way valve 23 or check valve, both positions of the 2/2-way valve are stable and are maintained, if not manual actuation forces acting on the 2/2-way valve. For this purpose, as shown schematically, the 2/2-way valve be equipped with a locking device, which ensures both possible positions of the 2/2-way valve. An actuation of the 2/2-way valve via an actuating member 24, in particular a push-in and pull-out actuator button, a switch o. Ä. In the effective switching position shown in the figure, the line branches 18, 20 are separated in the region of the manual control valve 22 for normal operation of the drive circuit 1 from each other. For an emergency operation, the actuator 24 can be manually operated, whereby the 2/2-way valve assumes its passage position in which this the line branches 18, 20 coupled to each other and "short-circuits".

In the closing line branch 18 and the opening line branch 20 in each case one in the direction of the associated pressure chamber 14, 15 opening check valve 25, 26 is integrated. The check valves 25, 26 each secure a pressure once reached in an associated pressure chamber 14, 15. In the end regions facing away from the pressure chambers 14, 15, the line branches 18, 20 end in each case at hydraulic connections 27, 28 of a reversible pump 29, which is reversibly driven by an electric drive unit 31 via a rigid, switchable and / or geared drive connection 30. Depending on the direction of conveyance of the reversible pump 29, this hydraulic fluid delivers into the closing line branch 18 or the opening line branch 20. The drive circuit 1 is equipped with a hydraulic tank 32, from which the pump 29 can convey hydraulic fluid into the line branches 18, 20. If the reversible pump 29, for example, hydraulic fluid in the closing line branch 18, the fluid flows in the opening direction of the check valve 25 in the direction of the pressure chamber 14. While basically the check valve 26 is locked so that with increasing hydraulic loading of the pressure chamber 14 no hydraulic fluid from the pressure chamber 15 via the check valve can get to the port 26 of the reversible pump 29 increases with the operation of the reversible pump 29, the pressure in the closing line branch 18 a. The check valve 26 can be unlocked via a control line 33, which branches off in the opening direction of the check valve 25 behind the check valve 25 of the closing line branch 18. If the pressure in the closing line branch 18 has risen sufficiently, the check valve 26 is unlocked via the control line 33, so that finally hydraulic fluid can be conveyed out of the pressure chamber 15 via the check valve 25 to the connection 28. Thus, after opening the check valve 26 hydraulic fluid is conveyed in a closed circuit from the pressure chamber 15 to the pressure chamber 14. The same applies in the reverse direction with reversal of the conveying direction of the reversible pump 29, including the check valve 25 is unlocked via a control line 34 which branches off from the opening line branch 20, so that even with an operation of the reversible pump 29 to produce an opening movement of the vehicle doors. 4 , 5 the hydraulic fluid is conveyed in a self-contained circuit. The Both line branches 18, 20 are coupled together in the forward direction in front of the check valves 25, 26 via a connecting line 35, which is connected via a branch point 36 with the hydraulic tank 32 and with a supply connection of the reversible pump 29. In the connecting line 36 check valves 37, 38 are integrated on both sides of the branching point, which, seen from the branching point 38, in the direction of the associated line branches 18, 20 lock.

A further connecting line 39 connects the line branches 18, 20, wherein the further connecting line 39 is arranged behind the check valves 25, 26 in the opening direction of the check valves 25, 26. In the connecting line 39, a valve 40 is integrated, via which the line branches 18, 20 selectively with a pressure sensor 41, in particular a pressure switch 46, are connectable. For the embodiment shown in the single figure, the valve 40 is designed as a shuttle valve 42. This has a first input 43, which is connected to the opening line branch 20, and a second input 44, which is connected to the closing line branch 18. The output 45 of the shuttle valve 42 is hydraulically connected to an input of the pressure sensor 41 and the pressure switch 46.

The drive circuit 1 has an electronic control unit 47. The control unit 47 has an input port 48, which is connected via the dashed lines shown electrical line 49 to the output of the pressure sensor 41, so that the control unit 47, the signal of the pressure sensor 41 is supplied. In addition, the control unit 47 has a control output 50, via which the hydraulic actuation of the line branches 18, 20 can be controlled. For the illustrated embodiment, the control output 50 is connected via an electrical control line 51 to a control terminal 70 of the electric drive unit 31, so that depending on the control signal at the control output 50, the drive direction of the electric drive unit 31 and thus the reversible pump 29 can be changed and / or Drive speed of the electric drive unit 31 and the pump 29 can be changed, which correlates with a changed hydraulic loading of the line branches 18, 20.

The drive circuit 1 has in each case the actuators 2, 3, the vehicle doors 4, 5 or the intermediate drive connections associated position sensors 52, 53. For the illustrated embodiment, the position sensors 52, 53 than with the drive shafts 12 coupled rotary potentiometers 54, 55 are formed. The outputs of the position sensors 52, 53 are connected via electrical lines 56, 57 to input terminals 58, 59 of the control unit 47, so that the output signals of the position sensors 52, 53 of the control unit 47 are supplied.

It is possible that the control unit 47 is also responsible for an electrical power supply of the electric drive unit 31, the pressure sensor 41 and / or the position sensors 52, 53.

Furthermore, as shown in the single figure, the control unit 47 via inputs 60 and / or outputs 61 with other units, control or regulating units, display devices communicate. To name just a few non-limiting examples, via an input 60 to the control unit 47, a desire for opening at least one vehicle door 4, 8 may be transmitted, for example from a remote switch. On the other hand, it can be caused by the control unit 47 via an output 61, that in case of defect at an optionally also remote location an audible and / or visual warning signal is generated. Without limiting the invention to the aforementioned examples, communication with a further control unit may also take place via an output 61 of the control unit, which may be the case, for example, if the control unit 47 knows that a vehicle door 4, 5 is not yet open has been closed, bringing a regulation for the powertrain, ignition u. Ä. Can be informed that the vehicle is not ready to drive, so that a recording of the driving operation can be prevented.

It is possible that a single control unit 47 is responsible for several doors 4, 5, which are opened and closed together. If additional valves controlled by the control unit 47 are integrated into the drive circuit 1, the control unit 47 can also cause the door 4 or the door 5 to be selectively opened or closed. It is possible that a bus with multiple drive circuits according to the single figure is equipped for several groups of vehicle doors.

• die Regeleinheit 47,
• die Verbindungsleitung 35 mit der Verzweigungsstelle 36 und den Rückschlagventilen 37,38,
• die entsperrbaren Rückschlagventile 25, 26 mit den zugeordneten Steuerleitungen 33, 34,
• einen Teilbereich der Leitungszweige 18, 20,
• die Verbindungsleitung 39 mit dem Ventil 40 bzw. Wechselventil 42 und
• den Drucksensor 41 bzw. den Druckschalter 46

umfasst. Diese Antriebskreis-Baugruppe kommuniziert mit den weiteren Bauelementen des Antriebskreises 1, die nicht Bestandteil der Antriebskreis-Baugruppe 62 sind, über elektrische und hydraulische Schnittstellen, insbesondere mit den Eingangsanschlüssen 58, 59, hydraulischen Anschlüssen 63 bis 66, in welchen Teilbereiche der Leitungszweige 18, 20, die Bestandteil der Antriebskreis-Baugruppe 62 sind, mit Teilbereichen der Leitungszweige 18, 20, die nicht Bestandteil der Antriebskreis-Baugruppe 62 sind, kommunizieren. Eine derartige Antriebskreis-Baugruppe 62 kann aus einzelnen Komponenten bestehen, die über die dargestellten Leitungsverbindungen miteinander verbunden sind. Ebenfalls möglich ist, dass die Bauelemente der Antriebskreis-Baugruppe 62 in ein gemeinsames Gehäuse integriert sind. Schließlich wird erfindungsgemäß auch vorgeschlagen, dass die Antriebskreis-Baugruppe 62 modular ausgebildet ist, bspw. mit einem Regelmodul 67, in welchem die Regeleinheit 47 angeordnet ist, sowie einem weiteren Modul 68, wobei die Module 67, 68 über die in der einzigen Figur gepunktet dargestellte Schnittstelle 69 miteinander gekoppelt sind. Die Schnittstelle 69 kann hierbei einerseits der gegenseitigen Abstützung und Befestigung der Module 67, 68 dienen, wobei vorzugsweise mit der genannten Befestigung auch eine Verbindung von elektrischen und/oder hydraulischen Leitungen erfolgen kann.In the claimed with the claims "hydraulic drive circuit assembly" may be the entire, in Fig. 1 Actuate drive circuit 1 act. However, it is also possible that it is in the hydraulic drive circuit assembly according to the invention is only partial elements of the drive circuit 1 shown in the figure. As an example, in the single figure, a hydraulic drive circuit assembly 62 is shown, which

• the control unit 47,
• the connection line 35 with the branching point 36 and the check valves 37, 38,
• the unlockable check valves 25, 26 with the associated control lines 33, 34,
• a subregion of the line branches 18, 20,
• the connecting line 39 with the valve 40 and shuttle valve 42 and
• the pressure sensor 41 and the pressure switch 46th

includes. This drive circuit module communicates with the other components of the drive circuit 1, which are not part of the drive circuit assembly 62, via electrical and hydraulic interfaces, in particular with the input terminals 58, 59, hydraulic connections 63 to 66, in which portions of the line branches 18, 20, which are part of the drive circuit assembly 62, with portions of the line branches 18, 20, which are not part of the drive circuit assembly 62 communicate. Such a drive circuit assembly 62 may consist of individual components which are interconnected via the illustrated cable connections. It is also possible that the components of the drive circuit assembly 62 are integrated in a common housing. Finally, the invention also proposes that the drive circuit assembly 62 is modular, for example. With a control module 67, in which the control unit 47 is arranged, and another module 68, wherein the modules 67, 68 dotted over in the single figure represented interface 69 are coupled together. The interface 69 can in this case on the one hand serve the mutual support and attachment of the modules 67, 68, whereby preferably also a connection of electrical and / or hydraulic lines can take place with said attachment.

It goes without saying that a division to other or more than the two modules 67, 68 mentioned can certainly also take place.

It will also be apparent to those skilled in the art that in a drive circuit assembly 62 of the present invention, some of the components and wiring included in the single figure may not be included so that they may be located outside the drive circuit assembly 62. By way of non-limiting example, the connection line 35 with the branching point 36 and the check valves 37, 38 may also be arranged outside the drive circuit assembly 62.

However, it is also possible that further components and connections are integrated in the drive circuit assembly 62, which are arranged according to the single figure outside the drive circuit assembly 62. To mention only a non-limiting example, the connection via the manual valve 22 may also be integrated into the drive circuit assembly.

• "Steuerung", "Steuerausgang", "Steuersignal" u. ä. einerseits und
• "Regelung", Regelungseingang" und "Regelungssignal" u. ä. andererseits

verwendet worden. Eine strenge Unterscheidung soll hier nicht erfolgen - vielmehr kann eine Regelung auch eine Steuerung sein, während bei Verwendung von "Steuerung" auch eine "Regelung" erfolgen kann.In the present specification, the terms

• "Control", "Control output", "Control signal" u. a. on the one hand and
• "Control", control input "and" control signal "and the like. On the other hand

used. A strict distinction should not be made here - rather a regulation can also be a control, while with the use of "control" also a "regulation" can take place.

The control unit 47 has an input terminal 71, via which the control unit 47, a signal is supplied, which corresponds to the electrical impingement of the electric drive unit of the pump. This may be a current, a voltage or a power consumption of the electric drive unit 31. This signal is used according to the invention as an indication of the output-side pressure of the pump 29. It is possible that due to the use of the signal at the input terminal 71 of the pressure sensor 41 or pressure switch 46 can be omitted. However, according to the invention, the pressure sensor 41 or the pressure switch 46 can also be used redundantly with the signal of the electric actuation of the drive assembly 31, which rests against the input connection 71. This is helpful for a fall-back solution, for example, failure of the pressure sensor 41, calibration of the pressure sensor 41, a teaching operation and the like.

LIST OF REFERENCE NUMBERS

1

drive circuit

2

actuator

3

actuator

4

vehicle door

5

vehicle door

6

closed position

7

closed position

8th

open position

9

open position

10

opening direction

11

closing direction

12

drive shaft

13

rack

14

Pressure chamber (closing direction)

15

Pressure chamber (opening direction)

16

piston

17

cylinder unit

18

Closing leg

19

branch

20

Opening leg

21

branch

22

Manual control valve

23

2/2 way valve

24

actuator

25

check valve

26

check valve

27

connection

28

connection

29

reversible pump

30

drive connection

31

electric drive unit

32

hydraulic reservoir

33

control line

34

control line

35

connecting line

36

branching point

37

check valve

38

check valve

39

connecting line

40

Valve

41

pressure sensor

42

shuttle valve

43

first entrance

44

second entrance

45

output

46

pressure switch

47

control unit

48

Input connection pressure sensor

49

electrical line

50

control output

51

control line

52

position sensor

53

position sensor

54

potentiometer

55

potentiometer

56

management

57

management

58

input port

59

input port

60

entrance

61

output

62

Drive circuit assembly

63

connection

64

connection

65

connection

66

connection

67

control module

68

module

69

interface

70

control connection

71

input port

Claims (16)

Hydraulic drive circuit assembly (62) for opening and closing at least one vehicle door (4; 5), for example, a bus, with a) at least one hydraulic line branch (closing line branch 18, opening line branch 20), which is connectable or connected to a pressure chamber (14, 15) of a hydraulic actuator (2, 3), wherein the hydraulic loading of the pressure chamber (14, 15) from the electrical Actuation of an electric drive unit (31) of a pump (29) is dependent and by the hydraulic loading of the pressure chamber (14; 15) the vehicle door (4; 5) in an opening direction (10) or closing direction (11) is acted upon, b) an electronic control unit (47) having a control output (50) via which the rotational speed of the electric drive unit (31) is controllable, c) having an input terminal (58; 59) of the electronic control unit (47) connectable or connected to a position sensor (52; 53) for detecting the position of the vehicle door (4; 5), d) an input terminal (71) of the electronic control unit (47) to which a signal is supplied, which corresponds to the electrical loading of the electric drive unit (31) of the pump (29), e) wherein the control unit (47) is equipped with control logic, which ea) based both on the signal at the input port (58; 59) for the signal of the position sensor (52; 53) eb) as well as based on the signal at the input terminal (71), which corresponds to the electrical loading of the electric drive unit (31) of the pump (29),
a control signal to the control output (50) for controlling the rotational speed of the electric drive unit (31) of the pump (29) generates, adjusts or regulates, determines an operating state of the vehicle door and / or carries out an error analysis of the drive circuit assembly (62). Drive circuit assembly (62) according to claim 1, characterized in that a) the electronic control unit (47) has an input port (48) which is connectable or connected to a pressure sensor (41) for detecting the pressure in the pressure chamber (14, 15), and b) the control unit (47) is equipped with control logic, which ba) based on the signal at the input port (58; 59) for the signal of the position sensor (52; 53), bb) based on the signal at the input terminal (71), which corresponds to the electrical impingement of the electric drive unit (31) of the pump (29), and bc) based on the signal at the input terminal (48) for the signal of the pressure sensor (41)
generates a control signal at the control output (50) for controlling the rotational speed of the electric drive unit (31), determines an operating state of the vehicle door and / or performs an error analysis of the drive circuit assembly (62). Drive circuit assembly (62) according to claim 1 or 2, characterized in that a) an opening line branch (20) is present, to which in the opening direction (10) acting pressure chamber (15) is connected or connected, and b) a closing line branch (18) is present, to which a force acting in the closing direction of the pressure chamber (14) is connected or connected. Drive circuit assembly (62) according to claim 3, characterized in that between the opening line branch (20) and the closing line branch (18) the pump (29) is interposed or interposed and the control unit (47) at the control output (50) generates a control signal , By means of which the electric drive unit (31) of the pump (29) is switchable from a promotion in the opening line branch (20) in a promotion in the Schließleitungszweig (18) and vice versa. Drive circuit assembly (62) according to any one of the preceding claims, characterized in that the hydraulic actuation of at least one line branch (Schließleitungszweig 18, opening line branch 20) is adjustable by changing the drive speed of the electric drive unit (31) of the pump (29). Drive circuit assembly (62) according to any one of claims 3 to 5, characterized in that between the opening line branch (20) and the closing line branch (18) a valve (40) is interposed or intermediately connectable, which the pressure sensor (41) depending on the hydraulic loading of the opening line branch (20) and / or the closing line branch (18) connects to the opening line branch (20) or the closing line branch (18). Drive circuit assembly (62) according to claim 6, characterized in that a) the valve (40) is a shuttle valve (42) whose aa) first input (43) is connected to the opening line branch (20), ab) second input (44) is connected to the closing line branch (18), ac) output (45) is connected to the pressure sensor (41), b) wherein the shuttle valve (42) connects the output (45) to the input (43, 44) whose pressure is greater than the pressure at the other input (44, 43). Drive circuit assembly (62) according to any one of the preceding claims, characterized in that a manually operable manual actuation valve (22) is present, which connects the opening line branch (20) with the closing line branch (18) in a manually brought about Notbetätigungsstellung. Drive circuit assembly (62) according to one of the preceding claims, characterized in that the pressure in the opening line branch (20) and / or the pressure in the closing line branch (18) via a releasable check valve, in particular a pilot-operated check valve (25, 26), is secured. Drive circuit assembly (62) according to one of the preceding claims, characterized in that the position sensor (52, 53) with a corresponding to the rotation of a rotary column or a drive shaft (12) of the vehicle door (4, 5) actuated potentiometer (54, 55) is formed, which is part of the drive circuit assembly (62) and / or whose output signal to an electrical connection (58, 59) of the electronic control unit (47) can be fed. Drive circuit assembly (62) according to any one of the preceding claims, characterized in that an actuator (2, 3) with at least one pressure chamber (14, 15) is part of the drive circuit assembly (62). Drive circuit assembly (62) according to one of the preceding claims, characterized in that a) control logic of the electronic control unit (47) is adapted to control the drive speed of the electric drive unit (31) of the pump (29) in dependence on the output signal of the position sensor (52, 53), b) where ba) the input speed of the electric drive unit (31) of the pump (29) is reduced when the output signal of the position sensor (52, 53) indicates that an approach to an end position of the vehicle door (4, 5) takes place, bb) the drive speed of the electric drive unit (31) of the pump (29) is reduced to zero when reaching an end position, bc) a predetermined dependence of the drive speed of the electric drive unit (31) of the pump (29) and / or the pressure of the output signal of the position sensor (52, 53) is controlled and / or bd) the input speed of the electric drive unit (31) of the pump (29) is changed to a defective drive speed when the output signal of the position sensor (52, 53) indicates that the position of the vehicle door (4, 5) is outside an end position, but a speed signal of the position change of the vehicle door (4, 5) falls below a threshold or has a zero crossing. Drive circuit assembly (62) according to one of the preceding claims, characterized in that a) control logic of the electronic control unit (47) is adapted to control the drive speed of the electric drive unit (31) of the pump (29) in dependence on the output signal of the pressure sensor (41), b) where ba) is closed with a pressure drop to a leak or other defect and / or bb) is closed with a pressure increase to a resistance of the vehicle door (4, 5) or the pinching of a person by the vehicle door (4, 5) or the reaching of an end position. Drive circuit assembly (62) according to one of the preceding claims, characterized in that a) control logic of the electronic control unit (47) is adapted to control the drive speed of the electric drive unit (31) of the pump (29) in response to the signal at the input terminal (71), which the electrical loading of the drive unit (31) of the Corresponds pump (29), b) where ba) is closed with a reduced electrical impingement of the drive unit (31) of the pump (29) to a leakage or other defect and / or bb) with an increased electrical impingement (29) of the drive unit (31) of the pump (29) to a resistance of the vehicle door (4, 5), the pinching of a person by the vehicle door (4, 5) or reaching an end position is closed , Drive circuit assembly according to one of the preceding claims, characterized in that a) control logic of the electronic control unit (47) is adapted to control the drive speed of the electric drive unit (31) of the pump (29) both in response to the output signal of the position sensor (52, 53) and in dependence of the signal at the input terminal (71), which corresponds to the electrical loading of the drive assembly (31) of the pump (29), b) where ba) at an increased electrical impingement of the drive unit (31) of the pump (29) and for an output signal of the position sensor (52, 53), which indicates that the vehicle door (4, 5) is not in an end position, to a pinching a person or the abutment of the vehicle door (4, 5) is closed to an obstacle, and / or bb) at a reduced electrical loading of the drive unit (31) of the pump (29) and for an output signal of the position sensor (52, 53), which indicates that the vehicle door (4, 5) is not in an end position, to a leakage or another defect is closed. Drive circuit assembly according to one of the preceding claims, characterized in that the control logic of the electronic control unit (47) is adapted to be in response to the signal at the input terminal (71), which of the electrical loading of the drive unit (31) of the pump (29 ) corresponds to perform a calibration of a pressure sensor and / or a functional test of a pressure sensor.

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