Electric adjustment device for seat adjustment in a motor vehicle, method for releasing a blocked electric adjustment device and computer program

Abstract

To release a blocked electric adjustment device for seat adjustment in a motor vehicle (4), the adjustment device comprises an adjustment mechanism (12) and an electric motor (16) equipped with integrated electronics (19) and an integrated protective function. Furthermore, a control unit (18) is arranged for controlling the electric motor (16). The control unit (18) has a normal mode for normal operation and a repair mode for performing a repair measure in the event of a mechanical blockage of the adjustment mechanism (12), where the mechanical blockage cannot be overcome in normal operation. The control unit (18) is further designed to control the electric motor (16) differently in repair mode than in normal mode in order to carry out the repair measure. Preferably, the protective functions are deactivated in repair mode.

Description

[0001] The invention relates to an electrical adjustment device for seat adjustment for a motor vehicle and a method for releasing a blocked electrical adjustment device as well as a computer program.

[0002] Electric seat adjustment devices typically include an adjustment mechanism, an electric motor, and a control unit for controlling the electric motor. Such adjustment devices typically incorporate one or more protective functions, for example, to protect the electric motor or adjustment mechanism from overload, or to protect personnel. These include, in particular, anti-pinch protection, overload protection, thermal protection, or block detection. If the protective function is triggered, the electric motor is automatically shut down. Modern electric motors have integrated control electronics that incorporate these protective functions.

[0003] With a seat length adjustment, the vehicle seat is moved lengthwise along two floor rails. Typically, a drive mechanism is located for each rail. In some cases, a separate electric drive motor is provided for each rail. In all cases, synchronization of the two drive mechanisms is required to ensure synchronous adjustment.

[0004] However, under unfavorable conditions, such a seat adjustment can lead to a mechanical blockage of the adjustment mechanism. Causes include, for example, stiffness due to increased friction, thermally induced tension, or a lack of synchronization between the drive mechanisms for the two rails. Other causes of mechanical tension include differences between sliding friction and static friction, as well as rotational inertia of drive elements.

[0005] Under certain circumstances, this can lead to a mechanical blockage in the adjustment mechanism, which cannot be overcome by normal operation of the electric motor, particularly due to the electric motor's integrated protective functions, such as overload protection. In severe cases, this can even lead to the point where non-destructive removal of the vehicle seat for repair is impossible.

[0006] Based on this, the invention is based on the object of providing an electric adjustment device for seat adjustment that can be overcome in the event of a mechanical blockage. The invention is further based on the object of providing a method for releasing a blocked electric adjustment device.

[0007] The object with regard to the electrical adjustment device is achieved according to the invention by an electrical adjustment device for seat adjustment for a motor vehicle with the features of claim 1. The adjustment device has an adjustment mechanism, an electric motor with integrated electronics in which at least one protective function is integrated, i.e. the integrated electronics has in particular algorithms and circuit components via which the at least one protective function is implemented. Furthermore, a control unit is designed to control the electric motor. According to one embodiment, the control unit is part of the integrated electronics and according to an alternative embodiment, it is integrated separately from the integrated electronics and, for example, away from the electric motor in the vehicle seat.In principle, it is also possible for the functions of the control unit described below to be divided into several physical units.

[0008] The control unit is generally configured to control and operate the adjustment device and in particular the electric motor, specifically in a normal mode to carry out normal operation and in a repair mode to carry out at least one repair measure, specifically in the event of a mechanical blockage of the adjustment mechanism, which blockage cannot be overcome during normal operation.

[0009] In the event of a mechanical blockage, the control unit is further designed to control the electric motor differently from normal mode in repair mode in order to carry out the repair. Therefore, in repair mode, the control unit activates a special repair process, specifically a repair algorithm, which initiates one or more repair measures to eliminate the mechanical blockage.

[0010] The object with regard to the method is correspondingly achieved by a method for releasing a blocked electrical adjustment device with the features of claim 14. In the event of a mechanical blockage of the adjustment mechanism, the system switches from the normal mode for carrying out normal operation to the repair mode for carrying out the repair measure, wherein in the repair mode the electric motor is controlled and operated differently from the normal mode.

[0011] In a preferred embodiment, at least one of the protective functions and preferably all protective functions are deactivated in repair mode at least for the duration of the repair measure.

[0012] The integrated protective functions include one or more, and preferably all, of the following protective functions: anti-pinch protection, overload protection, in particular overcurrent limitation and / or excess force limitation, thermal protection (protection against overheating), and block detection. Some of these protective functions serve to protect the electric motor and / or the adjustment mechanism, such as overload protection, thermal protection, and block detection. Other protective functions, such as anti-pinch protection, serve to protect the user. All of these protective functions are generally known. Overload protection limits the torque and / or motor current if a specified maximum torque or maximum motor current is exceeded. Thermal protection also typically limits the motor current if a specified operating temperature is exceeded.In the case of block detection, the motor typically switches off when a defined torque or a predefined, defined motor current is exceeded and / or when the adjustment mechanism is in a defined position.

[0013] By deactivating one or more, and in particular all, of these protective functions, especially the overload protection, it is possible to supply the electric motor with an increased motor current that is not permissible or not available during normal operation and thus to generate a higher torque or a higher adjustment force, which may be sufficient to release the blockage.

[0014] Overall, operating the electric motor in conditions that are not possible in normal mode makes it possible to release the mechanical blockage and return the entire adjustment mechanism to a state in which it can, for example, operate normally again. This does not necessarily require deactivating a protective function. Rather, a repair measure can also involve a specific control logic and a specific control pattern for the electric motor, although such control logic is not provided in normal mode.

[0015] In this case, the basic idea for carrying out a repair measure to resolve a mechanical blockage is to provide an additional repair mode or operating mode in which the electric motor is controlled differently than in normal operation.

[0016] In a suitable embodiment, the adjustment device, in particular the control unit, is designed to automatically detect mechanical blockages and / or to emit an indicator signal in the event of such a mechanical blockage. Automatic detection is performed, for example, based on parameters of the electric motor, such as torque, and in particular when a maximum torque is exceeded or when a characteristic torque curve occurs.

[0017] During repair mode, at least one of the following repair actions is performed: According to a preferred embodiment, as a repair measure, the electric motor is subjected to a current higher than the maximum current in normal mode. In this case, the overload protection is bypassed, and increased torque, increased motor current, and / or increased adjustment force are enabled to overcome the mechanical blockage caused, for example, by stiffness.

[0018] In addition or as an alternative, a pulsating control of the electric motor with a predetermined switching frequency is provided as a repair measure. Due to the pulsating control, the electric motor repeatedly exerts an adjustment force in a desired, predetermined adjustment direction. The desired, predetermined adjustment direction here is understood to be the adjustment direction and thus an adjustment movement that is required during normal operation and that is prevented by the mechanical blockage. During pulsating operation, the electric motor is therefore repeatedly energized at the predetermined switching frequency and not energized between individual current pulses, so that there are pauses in the supply of current between two current pulses for energization in the adjustment direction. This creates a pulsating movement in the adjustment direction, which can overcome mechanical stiffness.This is due, among other things, to the fact that during power-up pauses, a certain relaxation occurs within the adjustment mechanism due to system elasticities. This means that the pulsating control essentially relieves the stiffness, similar to that of a jackhammer or impact wrench, by repeatedly generating force peaks in the adjustment direction. By exploiting the system elasticity, a mechanical acceleration of the adjustment mechanism in the adjustment direction is also achieved, thus additionally utilizing moments of inertia.

[0019] According to a preferred development, the electric motor is vibratingly controlled at a predetermined switching frequency as a repair measure, specifically such that it is repeatedly controlled in and against the desired, predetermined adjustment direction. While the electric motor is only energized in the adjustment direction with pulsating control, it is energized in and against the adjustment direction with vibrating control. The effects previously described for pulsating control are thereby further enhanced. The retrograde control opposite to the desired adjustment direction, in particular, increases and further utilizes the previously described moments of inertia.

[0020] In a preferred embodiment, the electric motor is controlled differently during vibratory control in the adjustment direction and against the adjustment direction. In particular, it is controlled against the adjustment direction for a shorter time and / or with a lower motor current compared to control in the adjustment direction. As a result, adjustment against the adjustment direction is different from adjustment in the adjustment direction. In particular, adjustment against the adjustment direction has a lower amplitude and / or a lower torque than in the adjustment direction.

[0021] Amplitude in the pulsating or vibrating deflection is generally understood to be the degree of deflection in the direction of adjustment or against the direction of adjustment. Deflection refers, in particular, to the number of rotations of the motor shaft of the electric motor.

[0022] The amplitude is preferably limited to what is known as a system play. System play is understood to be play in the adjustment mechanism, particularly one that is due to tolerances, and specifically as an (idle) adjustment (rotation of the motor shaft) of the electric motor until the desired mechanical adjustment of a seat part occurs. The mechanical adjustment of the seat part involves, for example, an adjustment of the inclination of the backrest or of a seat part, a longitudinal adjustment or an adjustment of the height of the seat part. The (idle) adjustment of the electric motor depends in particular on the design of the adjustment device and is, for example, a rotation of a motor shaft of 180° to 360° for a longitudinal adjustment, 10 to 15 revolutions of the motor shaft for a height adjustment, and 20 to 40 revolutions of the motor shaft for a backrest inclination.

[0023] The previously defined switching frequency with which the pulsating or vibrating current is supplied is preferably in the range of 0.5 Hz to 10 Hz.

[0024] In a preferred further development, the amplitude for the control of the electric motor, i.e. in particular the number of rotations of the motor shaft, is varied for the pulsating or vibrating control and actuation (during the execution of a repair measure).

[0025] Alternatively or additionally, in a preferred further development, the switching frequency is varied during the execution of the respective repair measure, i.e. during the pulsating or vibrating control.

[0026] Furthermore, alternatively or additionally, in a preferred further development, a motor current is varied during the execution of the respective repair measure, i.e. during the pulsating or vibrating control.

[0027] In particular, the amplitude and / or switching frequency and / or motor current increase during the repair process, preferably increasing so that the greatest amplitude, highest switching frequency, or highest motor current is present at the end of the repair process. The increase may occur continuously or in steps, for example.

[0028] The varying amplitude and / or the varying switching frequency and / or the varying motor current promotes the release of the blockage.

[0029] In this case, switching frequency is understood to be the frequency of a periodic control, whereby the corresponding period duration, both in the case of pulsating control and in the case of vibrating control, is the time between the start of the energization of a first current pulse in the adjustment direction and the start of a subsequent, second current pulse in the adjustment direction. In the case of pulsating control, there is an energization pause between each of the two current pulses in the adjustment direction, whereas in the case of vibrating control, there is a current pulse counter to the adjustment direction between each of the two current pulses in the adjustment direction. Preferably, the duration of the current pulse in the adjustment direction and the duration of the current pulse counter to the adjustment direction or the duration of the energization pause each correspond to half a period duration.

[0030] In a preferred embodiment, the electric motor is actuated in a reversing mode as a repair measure, so that the adjustment mechanism is subjected to an adjustment force opposite to the desired adjustment direction specified in normal mode. In particular, in reversing mode, the adjustment mechanism is only subjected to an adjustment force acting opposite to the adjustment direction. The adjustment force therefore acts opposite to the direction in which the mechanical blockage exists. Through such a reversing mode, i.e. through the adjustment movement opposite to the desired adjustment movement, the adjustment mechanism can at least be moved back into a position in which it is adjustable in both directions.If the blockage was caused, for example, by a lack of synchronization between the drive mechanisms of the two rails, this can be repaired by further synchronizing the two drive mechanisms on both sides of the rail to eliminate the cause of the blockage. For synchronization, the adjustment mechanism is moved against a rear block, for example, and a synchronization procedure is performed.

[0031] In a preferred further development, if the intended repair measure fails, i.e. if the repair measure cannot remove the blockage of the mechanism, at least one or more and in particular all of the following measures are initiated: a) At least one repair measure is carried out repeatedly. b) Another, different repair measure is carried out and preferably carried out repeatedly. c) Different repair measures are carried out alternately. d) Different repair measures are carried out simultaneously.

[0032] For example, a predefined repair cycle is provided, which is successively processed until the blockage is resolved. This repair cycle includes a sequence of one or more of the above-mentioned measures.

[0033] Of particular note here is the simultaneous execution of different repair measures, for example pulsating or vibrating operation with increased current compared to the maximum current in normal operation.

[0034] In a practical design, repair mode is activated automatically. The blockage is generally first identified based on predetermined criteria. If a blockage is identified, repair mode is then initiated.

[0035] The blockage is identified and the repair mode is activated, in particular, if at least one of the following criteria is met: a) The mechanical blockage occurs repeatedly. b) A blockage effective in both directions is identified.

[0036] Case a) occurs, for example, when a blockage repeatedly occurs at the same position in the adjustment path due to dirt or damage to elements of the adjustment mechanism such as a spindle or a gear. If this repeated blockage is detected, particularly at the same adjustment position, then repair mode is activated and the blockage can be overridden. Because repair mode is only activated when blockage occurs repeatedly, this prevents the normal protective functions from being overridden, for example in the case of individual, singular overload cases, when pinch protection is activated. Repair mode is therefore generally activated when a blockage is repeatedly detected at the same adjustment position.

[0037] While in case a) an adjustment in the opposite direction is usually still possible, in case b) there is a blockage on both sides and the repair mode is activated.

[0038] The automatic activation has the particular advantage that the adjustment mechanism repairs itself during normal use, without the need for service personnel or the involvement of a repair shop.

[0039] Alternatively, the repair mode is activated via a maintenance device and / or manually. This maintenance device could be, for example, a special maintenance device kept at a repair shop. Alternatively, the maintenance device could be a higher-level control unit installed in the vehicle, which is therefore not located inside the vehicle seat.

[0040] According to a preferred embodiment, the repair mode can only be activated and carried out by a repair shop (workshop), i.e. with the help of a special external maintenance device.

[0041] When activated via the maintenance device, a suitable control signal is emitted via the maintenance device so that the repair mode (algorithm) integrated in the control unit of the adjustment device is activated according to a variant.

[0042] Alternatively, it is also possible, and is intended, for the corresponding algorithm for executing the repair mode to be (only) stored in the maintenance device. In this case, too, control signals are sent to the control unit integrated in the adjustment device.

[0043] Especially in the case where the repair measures and the algorithm for the repair mode are stored solely in the maintenance device, this maintenance device represents a special case in which the previously described control unit is divided into two different physical units: the (first) control unit, which, as described above, is part of the adjustment device, and the additional maintenance device. In this case, the first control unit has a communication interface for communicating with the maintenance device. This can be either a wired or wireless communication interface.

[0044] According to an alternative variant, the repair mode is activated manually directly on the control unit integrated into the adjustment device, specifically by operating a control element. This could, for example, be the actuation of a switch pin or a pin, which enables the repair mode.

[0045] The electric motor is, in particular, a BLDC motor. These motor types, in particular, feature the integrated electronics with integrated protection functions described above. With such motors, it is not possible, for example, to generate a higher motor torque than that provided in normal mode by increasing an applied control signal.

[0046] The entire adjustment device is in particular part of a motor vehicle, i.e. it is mounted inside a motor vehicle.

[0047] To achieve the object, a computer program is further provided which has instructions which, when the computer program is executed by the control unit described above, cause the control unit to switch from a normal mode to a repair mode and to control the electric motor to carry out at least one of the repair measures, so that the method described above is carried out.

[0048] Such a computer program is also provided, in particular, as a retrofit solution and, for example, is integrated into the maintenance device described above, so that the procedure for releasing a blockage can be carried out in an emergency during a repair operation.

[0049] The advantages previously mentioned with regard to the adjustment device and / or the method can also be applied to the computer program.

[0050] An embodiment of the invention is explained in more detail below with reference to the figures, which show, in schematic and highly simplified representations: Fig. 1 a vehicle seat of a motor vehicle in a side view, Fig. 2 a flow chart explaining the method for releasing a blocked electrical adjustment device, FG 3 a schematic vibrating control of the electric motor with varying amplitude and Fig. 4 a schematic vibrating control of the electric motor with varying switching frequency.

[0051] One in Fig. The vehicle seat 2 shown in Figure 1 is arranged in a motor vehicle 4, indicated here by a dashed line. The vehicle seat 2 has a seat part 6 and a backrest 8, the inclination of which is adjustable thereto and which is mounted so as to be rotatable about a pivot axis. The vehicle seat 2 is fastened in the motor vehicle 4 so as to be longitudinally displaceable along a lower rail 10. For the longitudinal adjustment of the vehicle seat 2, an adjustment mechanism 12 with an electric adjustment drive 14 is arranged. The adjustment mechanism comprises in particular the lower rail 10 shown and an upper rail (not shown in detail here), to which the vehicle seat 2 is fastened. The adjustment drive 14 has an electric motor 16, designed in particular as a BLDC motor, and in the exemplary embodiment, a spindle drive driven by the latter as an exemplary drive mechanism.The vehicle seat 2 is typically mounted on both sides on a lower rail 10, and an adjustment drive 14 of this type is preferably arranged on both sides. The adjustment mechanism 12 and the adjustment drive 14 together form an electric adjustment device for adjusting the vehicle seat 2. The adjustment device is part of the vehicle seat 2.

[0052] The electric motor 16 is controlled by a control unit 18, which in the embodiment of the Fig. 1 is designed as a control unit 18 separate from the electric motor 16. Alternatively, this control unit 18 is integrated into the electric motor 16. Regardless of whether the control unit 18 is an integral part of the electric motor 16, the latter, especially in the case of a BLDC motor, has integrated electronics 19 with protective functions as described above.

[0053] Furthermore, Fig. 1 also indicates an additional, external maintenance device 20, which can be connected to the control unit 18 to carry out a repair measure. For this purpose, a communication interface 22 is arranged on the control unit 18, via which control commands are transmitted.

[0054] Alternatively or additionally, the control unit 18 has a control element 24, for example, a toggle pin. Actuating the control element 24 manually activates a repair mode.

[0055] As described above, with such an adjustment device for seat adjustment, and in particular when using BLDC motors, there is the problem of a mechanical blockage that cannot be resolved by normal operation in a normal mode of the electric motor 16. In the present case, in the event of a blockage that cannot be resolved in normal mode, the activation and implementation of a repair mode is provided, within the framework of which certain repair measures are carried out that are not available in normal mode. The process for activating and implementing the repair mode is described below using the example of Fig. 2 explains in more detail: In step S1, the adjustment mechanism 12 is first mechanically blocked.

[0056] This is automatically detected in step S2 by the adjustment device, in particular by the control unit 18, as previously described. Subsequently, the repair mode is either automatically activated in step S3.1 or, alternatively, manually activated in step S3.2, for example, by actuating the control element 22 or using the maintenance device 20. In both cases, a switchover from normal mode to repair mode occurs.

[0057] When the repair mode is activated, a predefined repair process is initiated, i.e. a sequence of several steps to carry out one or more repair measures: First, in step S4, a first repair measure is performed, selected from one of the previously described repair measures. This first repair measure can also be a combined repair measure, i.e., in which several of the previously described repair measures are carried out simultaneously. Specifically, during this first repair measure, the integrated protective functions of the electric motor 16 are deactivated, and the electric motor is supplied with a higher current in the adjustment direction compared to the maximum current in normal mode. In addition, the previously described pulsating or vibrating control is also provided, for example.

[0058] If the repair measure is successful, i.e., if the blockage is cleared, the repair mode is terminated and step S5 follows. In this step S5, for example, a switch back to normal mode occurs. Alternatively or additionally, an error message is output or stored in a memory of the control unit 18. Finally, it is also possible that the cause of the blockage can be remedied in a repair shop.

[0059] If the first repair measure, which is typically only carried out for a given period of time, is unsuccessful, the same repair measure is repeated, for example after a defined break, as indicated by the dashed line.

[0060] As an alternative to repetition, or if the first repair measure fails multiple times, a further, alternative repair measure is performed in step S6. This, too, is repeated if, for example, it is unsuccessful. Alternatively, the first repair measure can be used again.

[0061] The respective duration for carrying out the individual repair measures, their repetition frequency and their sequence are preferably specified within the repair process.

[0062] If the repair measures and the repair process do not lead to success, i.e. to the removal of the blockage, the repair mode is terminated in step S7 and, for example, a corresponding error message is output.

[0063] In the Fig. 3 and Fig. Figure 4 illustrates exemplary control schemes, in particular a current supply to the electric motor 16 using a vibrating control. In the exemplary embodiment, a wave-shaped, particularly sinusoidal, control scheme is shown. This serves only for illustration purposes and can also be replaced by a pulsating control scheme and / or implemented as a pulsating control scheme, e.g., a pulse-width modulated control scheme.

[0064] Fig. Figure 3 shows a variant in which an amplitude—here plotted as a rotation angle γ of the motor shaft—varies during the control process while performing the vibrating repair measure. In the exemplary embodiment, an increase is provided. This increase is, for example, step-like or, alternatively, continuous. It is, in particular, continuous in the sense that the amplitude continues to increase over the course of the repair measure.

[0065] Fig. Figure 4 shows a variant in which the frequency is varied. The displacement—here as distance x(t)—is plotted against time t. Here, too, a continuous increase in frequency is preferred.

[0066] According to a further embodiment, a variation of the motor current, for example analogous to that in the Fig. 3 is provided. This increases the engine torque in particular.

[0067] The increase in amplitude and / or frequency and / or motor current is, for example, at least a factor of 2 and more preferably at least a factor of 5 or even at least a factor of 10.

[0068] The various control modes can be combined with each other. Overall, the varying control mode helps to resolve the blockage.

[0069] Furthermore, a different control is preferably provided in and against the adjustment direction, so that, for example, the amplitude and / or the motor current is lower when controlled against the adjustment direction than in the adjustment direction. List of reference symbols 2 vehicle seats 4 Motor vehicle 6 Seat part 8 backrest 10 bottom rail 12 adjustment mechanism 14 Adjustment drive 16 electric motor 18 Control unit 19 integrated electronics 20 Maintenance device 22 Communication interface 24 Control

Claims

[1] Electric adjustment device for seat adjustment for a motor vehicle (4), with - an adjustment mechanism (12), - an electric motor (16) which has integrated electronics (19) with at least one integrated protective function and with - a control unit (18) for controlling the electric motor (16), wherein - the control unit (18) has a normal mode for carrying out a normal operation and also a repair mode for carrying out a repair measure in the event of a mechanical blockage of the adjustment mechanism (12), wherein the mechanical blockage cannot be overcome in normal operation, and wherein - the control unit (18) is designed to control the electric motor (16) in the repair mode different from the normal mode in the event of a mechanical blockage in order to carry out the repair measure. [2] Adjusting device according to the preceding claim, wherein the control unit (18) is designed to deactivate the at least one protective function and preferably all protective functions in the repair mode. [3] Adjusting device according to one of the preceding claims, wherein at least one or more and in particular all of the following protective functions is / are formed by the integrated electronics (19): pinch protection, overload protection, thermal protection, block detection. [4] Adjustment device according to one of the preceding claims, which is designed for automatic detection of the blockage and / or for emitting an indication signal in the event of a blockage. [5] Adjusting device according to one of the preceding claims, wherein the control unit (18) is designed to apply an increased current to the electric motor (16) as a repair measure compared to a maximum current in normal mode. [6] Adjusting device according to one of the preceding claims, wherein the control unit (18) is designed to control the electric motor (16) in a pulsating manner with a switching frequency as a repair measure, so that it repeatedly exerts an adjusting force in a desired adjusting direction. [7] Adjusting device according to one of the preceding claims, wherein the control unit (18) is designed to control the electric motor (16) vibratingly with a switching frequency as a repair measure, such that it is repeatedly controlled in and against a desired adjustment direction. [8] Adjusting device according to the preceding claim, in which the electric motor (16) is controlled differently in the adjustment direction and against the adjustment direction, in particular it is controlled for a shorter time and / or with a lower current against the adjustment direction. [9] Device according to one of the two preceding claims, wherein the switching frequency is in the range of 0.5Hz to 10Hz. [10] Device according to one of claims 6 to 9, wherein when controlling the electric motor (16) the switching frequency and / or an amplitude and / or a motor current is varied and preferably increases. [11] Adjusting device according to one of the preceding claims, wherein the control unit (18) is designed to control the electric motor (16) in a reversing mode as a repair measure, so that the adjusting mechanism (12) is subjected to an adjusting force opposite to the adjusting direction specified in the normal mode. [12] Adjusting device according to one of the preceding claims, wherein the control unit (18) is arranged to initiate one or more of the following measures in the event of failure of the repair measure: a) Carry out the repair work repeatedly. b) A further repair measure, to be carried out repeatedly if necessary. c) To carry out different repair measures alternately. d) Carry out several different repair measures simultaneously. [13] Adjusting device according to one of the preceding claims, wherein the repair mode is activated automatically, in particular if at least one of the following criteria is met: a) The mechanical blockage occurs repeatedly. b) A blockage effective in both directions is identified. [14] Adjusting device according to one of claims 1 to 10, wherein the repair mode is activated via a maintenance device and / or manually, in particular by a) a control signal via the maintenance device, b) Operating a control. [15] Adjusting device according to one of the preceding claims, which is arranged in a motor vehicle and wherein the electric motor (16) is a BLDC motor. [16] Method for releasing a blocked electrical adjustment device in a motor vehicle (4), which is designed in particular according to one of the preceding claims, and which comprises - an adjustment mechanism (12), - an electric motor (16) having integrated electronics (19) with an integrated protective function, wherein - in the event of a mechanical blockage of the adjustment mechanism (12), switching is effected from a normal mode for carrying out normal operation to a repair mode for carrying out a repair measure, and in the repair mode the electric motor (16) is controlled differently from the normal mode. [17] Computer program comprising instructions which, when the computer program is executed by a control unit (18), cause the control unit (18) to switch from a normal mode to a repair mode and to control an electric motor (16) to carry out a repair measure, so that the method according to the preceding claim is carried out.

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