EP1552973A2 - Control unit for a regulating device in a vehicle, specially for a window opener - Google Patents

Abstract

Control device for a motor vehicle actuator, especially a motor vehicle window lever has a computer unit for controlling the drive of the actuator. The computer unit is configured so that it will stop the actuator drive or start a process for stopping it if a signal corresponding to the drive torque exceeds a response threshold. It also designed to change the response threshold in response to a temporal or spatial change in the signal, i.e. if the rate of change of the signal increases, the response threshold will be reduced. The invention also relates to a window lever with a drive and an actuator mechanism, a digital storage medium and a computer program product.

Description

description

The invention relates to a window regulator, a control device of a Window lifter and a method for controlling a window regulator.

From DE 197 45 597 A1 discloses a method for controlling and regulating the Adjusting movement of a translationally adjustable component, in particular a Windows in motor vehicles known. In this method of control and Control of the adjustment movement of the translationally adjustable component, with a Setting device, a drive device and a control and regulating electronics is a effective anti-trap protection taking into account even in restricted areas sufficiently large adjustment force and on the vehicle body ensures acting, caused by external forces forces. For this practice the Drive device from an adjustment, equal to the sum of the adjustment of the Component necessary force and an excess force, the sum is smaller or is equal to a permissible pinching force. The adjusting force or the excess force is additionally depending on the vehicle body or parts thereof governed by acting forces.

The solution ensures that it acts over the entire adjustment range Anti-pinch protection, which also meets very high safety requirements. Furthermore ensures that the adjustment even in the stiffness ranges is sufficiently large and that an adjusting device a translationally adjustable Component taking into account the acting on the vehicle body outer Influences in accordance with the operator material gently adjusted. As outer Influences are here the forces acting on the vehicle body or forces Understood acceleration forces that are not directly through the actuator or be caused by a drive means, but for example because of bad condition of the route (driving through a pothole) or at Close a vehicle door occur.

The regulation of the adjusting force or the excess force is preferably carried out in Dependence on the direction of movement of the translationally adjustable component and from the predominant direction of action occurring acceleration forces such, that the adjusting force is always less than or equal to the permissible pinching force. acts For example, on the vehicle body an acceleration force, the Supports closing movement of a translationally adjustable component, so is preferably the threshold is lowered. In case of occurrence of one of Closing movement opposing acceleration force becomes the threshold increased. In this way, the adjusting force is always sufficiently large, so that the Closing movement safely continued and anti-pinch is guaranteed.

Furthermore, it is provided that when occurring within a predetermined Time varying on the vehicle body acting acceleration forces a regulation of the adjusting force or the excess force is interrupted and a threshold value is specified such that the adjusting force is always less than or equal to the permissible pinching force is. The time span is for example 100 ms. This embodiment takes into account that in constantly changing, on the Vehicle body acting acceleration forces the threshold is not is constantly changing within a short period of time, resulting in impairment could lead to the movement of the translationally adjustable component. By the Specification of a fixed threshold that is always less than or equal to the permissible limit Clamping force is, both a safe movement of the translationally adjustable Ensured component as well as a pinch protection.

The acceleration forces acting on the vehicle body are preferably detected by a sensor, for example by a digital signal delivering Sensor. Digital signals can be easily controlled in a control electronics processed. To set the scheme can thereby single or multiple, time sequential signals from the sensor of the control and regulating electronics be evaluated. The repeated evaluation of the signals of the sensor makes it possible a simultaneous occurrence of the acceleration forces caused by external influences and to identify the forces caused by a trapping case safely.

From DE 195 17 958 a motor drive device for a motor vehicle is known. In the power window apparatus for a power window, the rotation becomes the engine stopped immediately when the movement of the window when turned Motor an obstacle opposes. The motor drive device is used for opening and for closing the movable part (window) and can be selectively operated and be stopped.

An electric current measuring device measures the strength of the motor through in one Start compensation time flowing current, a current magnitude change detection device sets a current increment from the detected current at each constant time interval fixed, and a motor controller provides a first or a second Control signal to the motor drive device, wherein the first signal depending on the polarity of the current increment of the engine operation continues and with the second signal the engine is stopped immediately.

Two selector switches indicate the direction of rotation of the motor, a pair of key switches for the respective motor directions and two self-holding circuits for the two Turning directions of the motor allow rotation of the motor when one of the Button switch.

From DE 196 49 698 A1 is a control device for a powered shut-off which is independent of their configuration and in various ways remotely operated and can be operated immediately. Use security measures an adaptation strategy to a highly sensitive obstacle detection by learning the power requirements of the system and having a Safety margin be equipped. The control system allows a completely manual handling of the barrier.

Information about the operating force is stored at each point Trajectory of the tailgate along its predetermined trajectory is necessary to close the tailgate. Values are in four multidimensional arrangements saved. The dimensions of the arrangement are direction of movement and position. The Direction of movement is opening or closing. The position is any number of Divisions of the prescribed course. The operating force (fmem), which is determined Time derivative of the actuating force (dfmem), the fluctuation of the operating force measurements (vfmem) and the fluctuation of the measurements of the derivative of Operating force after the time (vdfmem). Other stored values include the Number of tailgate opening and closing operations without the detection of a Obstacle, the number of obstacles detected, and the average Operating force over the last n minutes.

The operation of the tailgate takes place at the time t, at which the tailgate in the Part area p of their path is located along the predetermined path, and the Direction of movement of the tailgate is d. The memory values are used to determine a Obstacle used as follows:

• Die gegenwärtige Kraft (f(d,t)) ist größer als die im Speicher gespeicherte Kraft für diese Heckklappenposition (fmem[d,p]), und zwar um eine Abweichung (fmargin(d)).
• Die gegenwärtige Ableitung der Kraft nach der Zeit (df/dt(d,t)) ist größer als die Zeitableitung der Kraft, die für diese Heckklappenposition im Speicher gespeichert ist (dfmem(d,p)), und zwar um eine Abweichung (dfmargin(d)).
• Die gegenwärtige Kraft (f(d,t)) ist größer als eine vorbestimmte absolute Maximalkraft (fmax(d)). Diese Maximalkraft ist ein Maximum, das in keinem Fall überschritten werden darf.

The measured force of the first actuator is compared with the force arrangement for the present tailgate position and direction, with a system-dependent combination of the following conditions:

• The current force (f (d, t)) is greater than the stored force in memory for this tailgate position (fmem [d, p]) by one deviation (fmargin (d)).
• The current derivative of the force after time (df / dt (d, t)) is greater than the time derivative of the force stored in memory for that tailgate position (dfmem (d, p)) by one deviation (dfmargin (d)).
• The present force (f (d, t)) is greater than a predetermined absolute maximum force (fmax (d)). This maximum force is a maximum that must never be exceeded.

The deviation is adjustable. In addition, the deviations (both fmargin and dfmargin) can be constructed as a function of vfmem [d, p] and vdfmem [d, p]. This means that the deviation itself is a function of the position and varies with each position over time as the force varies. As a result, with an increase in the temporal or local change of the force, the deviation is also increased .

When the force at the position d, p is the same at every cycle, the deviation becomes smaller and the system more sensitive. If the force at the position d, p at each Pass is significantly different, therefore, the deviation will tend to be large stay. The deviation is limited, so they do not have a specific point can grow out, and the pursuit of their magnification over this point In addition, indicates a system error.

Another extension is the stored forces (either one or both of fmem (p) and dfmem (p)) as a function of any external sensor (e.g. a temperature sensor) to familiar and predictable Take into account environmental influences.

If the arrangements contain valid data and the controller does not detect an obstacle during tailgate movement, the values are changed according to the following formulas: fmem [d, p] = (k1 xf (d, p) + k2 x fmem [d, p]) / k1 + k2 dfmem [d, p] = (k3 × df / dt (d, p) + k4 × dfmem [d, p] / k3 + k4 vfmem [d, p] = (k5 x (f (d, p) -fmem [d, p] + k6 x vfmem [d, p] / k5 + k6 vdfmem [d, p] = (k7 x (f (d, p) -fmem [d, p] + k8 x vfmem [d, p] / k7 + k8 where k1, k2, k3, k4, k5, k6, k7 and k8 are determined empirically depending on the dynamics of the system. Accordingly, an increasing temporal change to the previous dfmem [d, p] leads to an increase of the new, current dfmem [d, p]. k1, k2, k3, k4, k5, k6, k7 and k8 affect the speed with which the system learns and therefore how the system responds to a changing environment. Typically these values are chosen so that k1, k3, k5 and k7 are much smaller than k2, k4, k6 and k8.

Object of the present invention is a control device of a Adjustment to develop a motor vehicle on. This task is done by the control device with the features of claim 1 and the window regulator with the features of claim 24, and by the computer program product with the features of claim 26 solved. Advantageous developments of the invention are given in the subclaims. To develop the invention In addition, the features of the claims particularly advantageous with each other as well combined with features of the cited prior art.

Accordingly, a control device of an adjusting device of a motor vehicle intended. The adjusting device is preferably a motor vehicle window lifter. The Control device can on a semiconductor chip, as a so-called "smart power solution", So be designed as integrated, intelligent power electronics, or consist of several electronic and / or electro-optical components. The control device has at least one arithmetic unit for control a drive of the adjusting, which, for example, pure hardware in Form of a hard-wired program structure and / or is freely programmable. This arithmetic unit is for example a microcontroller.

The arithmetic unit is set up to stop an adjustment movement of the drive or to start a process for stopping the adjusting movement of the drive, when a to Torque of the drive correlating signal a current threshold exceeds. This feature can also be used as a anti-jamming function Adjustment be called. That correlates to the torque of the drive Signal is for example the drive current and / or its temporal change, the Speed of the drive and / or its time change and / or one on the drive acting force and / or its change. Apart from these enumerated Examples may alternatively or in combination with others of the torque correlated signals are evaluated. Under the correlation is doing any Understood form of dependence on the speed. The type of correlation is here depending on the size to be evaluated. For example, the speed evaluated, the correlation is a speed-torque characteristic of the drive, in particular an electric motor. The threshold is exactly then, if this for anti-jamming function with the measured signal for the same Adjustment position is compared. Furthermore, for a subsequent adjustment a adapted response threshold determined by the current threshold together evaluated with the current signal and, where appropriate, other influencing factors become.

Therefore, the threshold is not a fixed threshold, but a variable value, which is changeable by the arithmetic unit. With this current threshold is compared the torque correlating signal and in case of exceeding the current threshold of the drive as a function of the comparison result controlled. This current threshold is preferably during the adjustment adjusted by depending on the temporal and / or local change of the Signal the current threshold is changed so that with increasing temporal or local change of the signal reduces the current threshold becomes. For a reduction of the current threshold, this is closer to that introduced comparative signal, so that the distance between signal and current Threshold is reduced. For example, the drive current or a force evaluated as a signal, to reduce the current threshold the value increased. If, for example, the reciprocal of the speed as a signal is evaluated to reduce the current threshold the value of the same lowered.

The current amount of the value of the current one is preferably changed Threshold. Under the temporal or local change of the signal is thereby both the first and any further derivation of the signal by location and / or time Understood. Also includes the temporal and / or local change of the signal as well Differences of the successive values of the signal, if this is due to the Measurement resolution is time-discontinuous or local discontinuous.

The device of the arithmetic unit can be done for example by a program, that is recorded in the arithmetic unit and with the computing unit accordingly is configured. Alternatively or in combination, this program can be used in the arithmetic unit also be hardwired (ROM) integrated. This program leads a process out, which allows the evaluation of the correlating signal. This program can in a digital storage medium, such as a floppy disk or a non-volatile memory (EEPROM) are stored.

A particularly advantageous development of the invention provides that the Arithmetic unit is set to change the current threshold only below the condition that the temporal or spatial change of the signal Minimum change value exceeds. Below this minimum change value finds Consequently, no change in the current threshold depending on the temporal or local change of signal instead. However, this is a change the threshold, which is due to other dependencies, not locked out.

For example, the threshold may vary depending on other values be adapted. For adaptation is in an advantageous embodiment of the invention provided that values of the signal from at least one previous adjustment be evaluated and stored for the adaptation of the threshold. Preferably the current value of the signal is weighted with a factor and with values averaged in advance, all in each case the same adjustment assigned. Another type of averaging can be done by preceding Values of the signal of the same displacement averaged and the determination of the current Threshold, in particular using an offset as a basis become.

In a further advantageous embodiment of the invention, the arithmetic unit set the threshold in addition depending on the course of the to change the mean amount of the signal. As a result, the threshold is in Changed depending on the amount. This can, as previously noted, also by averaging the signal with equal or different weighting factors for the individual values of the signal. The adapted threshold This causes slow changes in the amount of the signal over the adjustment path adapted and for these slow amounts changes advantageously in a set substantially constant distance to the mean of the signal. slow Amount changes can be caused, for example, by changes in temperature Changes in mechanical stiffness compared to previous ones Adjustments caused, allowing an adjustment of the adapted threshold for a respective, the binding associated adjustment position advantageous is.

For example, the averaging can be done over the last 4 to 8 values of the same adjustment or over 2 to 6 values of previous displacements, each referring to the same Obtain Verstellorte done. As a result, short-term, non-significant Changes have no significant effect on this mean. If the correlating Signal is a speed of the drive, is therefore advantageously provided that the arithmetic unit for changing the threshold in addition to an absolute speed of the adjusting device is set up.

According to a further advantageous embodiment of the invention, the arithmetic unit set up to change the current or adapted threshold additionally as a function of a stiffness of the adjusting device. The rigidity of Adjustment can advantageously determined by the arithmetic unit or this is before commissioning as a parameter set in the arithmetic unit loaded. The rigidity can be made of different individual stiffness of the Adjustment be composed.

A preferred embodiment of the invention provides that the arithmetic unit The change is the change of the current threshold to the temporal or local Change the signal to correlate mathematically. In this case, the change serves the signal not just as a trigger to change the current threshold, but the value of the change of the current threshold is also on the value related to the change of the signal.

In a first embodiment variant of this embodiment of the invention is the Correlation the change of the current threshold as a function of a Map. This map is preferably stored in the arithmetic unit and especially adaptable by the arithmetic unit. In the map are the Modification values of the current response threshold of the temporal or local change associated with the signal. In addition, the map can further dependencies of others Take into account measured values or control signals and for this several sets of Provide map values.

In a second embodiment variant of this embodiment of the invention is the Correlation the change of the current threshold as a function of one mathematical function. The mathematical function gives here as output the required change value of the current threshold. The temporal or local change of the signal serves as input of the function. In addition, you can Further input variables can be evaluated by the function. Also are possible parameters of the function, in particular by the arithmetic unit or by a other electronics changeable.

Preferably, the mathematical function is a continuous function. A special simple design of this embodiment variant provides that to the reduction the current threshold the change value of the current threshold proportional to the temporal or spatial change of the signal. These Design variant can be particularly advantageous with the minimum change value be combined. Alternatively, the mathematical function can also be a step function be, which allows a simplified calculation of the current threshold.

In addition to the control device, the invention also relates to a window lifter a drive and an adjustment mechanism for adjusting the position of Windowpane. In addition, this window has the previously described Control device for controlling the drive on.

Furthermore, the invention relates to a digital storage medium, in particular a Floppy disk, with electronically readable control signals, so with a programmable arithmetic unit can interact that a procedure is performed by an adjustment of a drive of the adjustment stopped or started a process for stopping the adjustment of the drive when a signal correlating to the torque of the drive is a current one Threshold exceeds. In another procedural component, the current Threshold depending on the temporal or local change of the Signal changed by increasing positive temporal or local change of the signal the current threshold is lowered.

In addition, the invention relates to a computer program product with on one machine-readable carrier stored program code for performing a Process by an adjusting movement of a drive of the adjusting stopped or a method for stopping the adjusting movement of the drive is started, if a torque correlating to the drive signal a current Threshold exceeds and by the current threshold in Dependence on the temporal or spatial change of the signal is changed if the program product runs on a processor.

Moreover, the invention relates to a computer program with a program code for Implementation of a method by an adjusting movement of a drive of Adjustment stopped or a method for stopping the adjustment of the Drive is started when a correlated to the torque of the drive signal exceeds a current threshold and by the current threshold is changed as a function of the temporal or spatial change of the signal, if the program product runs on a processor.

In the following the invention with reference to embodiments with reference to illustrated drawings explained in more detail.

FIG 1

eine schematische Darstellung des Verlaufs eines zu einem Antriebsmoment eines Fensterhebermotors korrelierenden Signals,

FIG 2

eine schematische Darstellung des Verlaufs einer Drehzahl eines Fensterhebermotors und deren Änderung als zum Antriebsmoment des Fensterhebermotors korrelierendes Signal,

FIG 3

eine schematische Darstellung der Änderungswerte der Ansprechschwelle in Abhängigkeit von der zeitlichen Änderung des zum Antriebsmoment des Fensterhebermotors korrelierenden Signals, und

FIG 4

eine schematische Darstellung des örtlichen Verlaufs einer zu dem Antriebsmoment eines Fensterheberantriebs korrelierenden Signals.

Show

FIG. 1

1 is a schematic representation of the course of a signal correlating to a drive torque of a window lift motor;

FIG. 2

a schematic representation of the course of a speed of a window regulator motor and its change as correlated to the drive torque of the window regulator motor signal

FIG. 3

a schematic representation of the change values of the threshold in response to the change over time of the signal correlating with the drive torque of the window regulator motor, and

FIG. 4

a schematic representation of the local course of a correlating to the drive torque of a window lift drive signal.

Between a disc top edge and a seal of a window pane one Motor vehicle door is during a closing operation of the disc the risk that the body part of a person in a gap between the disc top edge and the Seal is pinched and injured. To protect persons from serious injuries will protect the electric motor of a window moving window regulator controlled by a control device, which detects the Einklemmfall for this purpose.

The control device is configured by a program to stop the closing movement of the electric motor or to start a process for stopping the closing movement of the electric motor when the jamming case is detected. The trapping case is detected by the control device recognizing when a signal F, F (x), F (t) correlating to the torque of the electric motor exceeds a current response threshold s, s (x), s ₁ , s ₂ . Two such cases are shown by way of example in FIG.

The torque correlating signal is measured in FIG. 1 as a time dependent one Force F (t). However, the invention is not limited to this specific embodiment limited. As an alternative to this force F (t), all the torque of the Electric motor correlating signals, such as the drive current of the Electric motor or the speed of the electric motor can be evaluated. Likewise as an alternative to the time dependence of the course of this signal also displacement-dependent signal (n (x), see FIG. 2 or FIG. 4), which corresponds to the Torque of the electric motor correlated, evaluated.

FIG. 1 shows a plurality of time profiles of the force F (t). The first course of force f ₁ (t) overstepping the time t ₁ the current threshold _S1. At this time t ₁ , the control device detects the trapping event and the electric motor is stopped and subsequently reversed and consequently energized for an adjustment in the direction opposite to that before the trapping case. The kinetic energy present in the window regulator at the time of detection t ₁ will increase beyond the current threshold s ₁ due to the inertia of the window regulator system, the force F ₁ (t). This has the consequence that a maximum pinching force F _{1 max is} achieved.

The value of the maximum trapping force F _{1 max also} depends, in addition to the dependence on the kinetic energy present at the time of tucking in t ₁ , on the sum of the rigidity of the window regulator system and the stiffness of the trapped body part. The pinching of the body part causes a significant change .DELTA.F ₁ / .DELTA.t of the force F ₁ (t) on the basis of the force F _v , which was determined before Einklemmfall. This force F _v is typically a previously averaged value.

If the response threshold s _{1 is} constant and independent of the change ΔF ₂ / Δt of the force F ' ₂ (t), this results, as shown in FIG. 1, in the case of a force ΔF ₁ / Δt compared to the first significant change F ₁ (t) increased second change ΔF ₂ / Δt of the force F ' ₂ (t) to an increased maximum trapping force F' _{2 max} . This increased maximum trapping force F ' _{2 max} is due to the fact that when reaching the constant threshold s ₁ at time t' _2, the kinetic energy impinging on the much stiffer body part has to be reduced over a smaller adjustment period or over a smaller adjustment path.

In order to avoid such force peaks F ' _{2 max} , depending on the increased change ΔF ₂ / Δt of the force F ₂ (t), the current threshold s ₂ is lowered to a lower value. This causes that already at an earlier time t _{2 of} the pinching case is detected by the control device. Consequently, the occurring force peak F _{2 max} , which acts on the clamped body part, significantly reduced.

FIG. 2 is a schematic representation of an adjustment-dependent profile of the rotational speed n of the electric motor of a further exemplary embodiment of the invention. With constant speed n ₀ , the adjustment reaches the location x ₀ . At this location x ₀ , the rotational speed n changes. In FIG. 2, three different changes n ₁ (x), n ₂ (x) and n ₃ (x) are shown schematically. In the case of a slow change of the speed n ₃ (x), the anti-jamming protection (EKS) is not activated, thus remains inactive. In this case, it can be, for example, an adjustment-dependent stiffness of the window lifter, so that the window lifter would incorrectly detect this slow change of the rotational speed n ₃ (x) as a trapping case and would thus misrevers.

The change in the speed n ₃ (x) for this speed curve is below a minimum change value k, so that no adaptation of the current threshold occurs. On the other hand, the other two changes n ₁ (x) and n ₂ (x) are in the active region of the anti-jamming protection and also above the minimum change value k. The anti-trap activation threshold EKS and the minimum change value k may be different. In the exemplary embodiment of FIG. 2, the minimum change value k is smaller than the anti-pinch activation threshold EKS, but this depends on the respective application and can also be carried out in reverse or with the same values. Depending on the height of the fall in the rotational speed n, different response thresholds s ₁ or s _{2 are} set which are distanced from the mean value of the rotational speed n ₀ before the trapping case Δ ₁ , Δ ₂ .

The change .DELTA.s of the current response threshold occurs as a function of the time or local change dF / dt or dF / dx of the adjustment force F (t) or F (x) which is decisive for the detection time or detection adjustment location. This dependency is shown by way of example in several exemplary embodiments of the invention in FIG. The change .DELTA.s of the current response threshold occurs in FIG. 3 as a function of the time change dF / dt of the force F (t). In a first example, the change Δs _{1 of} the current response threshold is formed by means of a quadratic function from the time change dF / dt of the force F (t).

If, contrary to this first embodiment of FIG. 3, a minimum change value k of the force F (t) is used, the time change dF / dt of the force F (t) below this minimum change value k does not lead to a change in the current response threshold. Due to this specific embodiment, unwanted noise, which may be caused for example by measurement errors, does not lead to a change in the current response threshold. A particularly simple embodiment of the invention provides a change Δs _3, which is proportional to the time change dF / dt of the force F (t), of the current response threshold from the minimum change value k.

As an alternative to the use of a function with the input variable of the temporal change dF / dt of the force F (t) and the output variable of the change Δs ₁ , Δs _{3 of} the response threshold, a map dependency is shown schematically in a further exemplary embodiment of FIG. Change ranges of the temporal change dF / dt of the force F (t) are accordingly assigned values of the change Δs _{2 of} the current response threshold.

FIG. 4 shows a local course of the force F (x). The course of the force F (x) is adjusted for the subsequent adjustment respectively adapted threshold s (x), so that the distance changes only by a small amount for the already passed adjustment positions during the adjustment. At location x0 a significant change dF / dx of the force F (x) is determined. On the basis of the evaluation of the force change dF / dx, a change Δs in the current response threshold s (x) is determined, for example as described above in FIG. As a result, in this exemplary embodiment, the advantage is achieved that the maximum pinching force F ' _max acting on the force F _max without lowering the current response threshold s (x) is significantly reduced.

LIST OF REFERENCE NUMBERS

s (x), s ₁ , s ₂

threshold

F (t), F ₁ (t), F ₂ (t), F ' ₂ (t)

time-dependent signal correlating to the drive torque

F (x)

location-dependent signal correlating to the drive torque

F _v

Mean value of the signal before pinching

Fmax, F ' _max , F _{1 max} , F _{2 max} , F' _{2 max}

Maximum value of the signal in case of pinching

dF / dt, dF ₁ / dt, dF ₂ / dt

temporal change of the signal

n

Speed of the window regulator drive

n ₀

Mean value of the speed

Δ ₁ , Δ ₂

Distance between the threshold and the speed

x

Way, adjustment, place

n ₁ (x), n ₂ (x), n ₃ (x),

location-dependent speed curve

ΔS ₁ , ΔS ₂ , ΔS ₃ , ΔS

Change value of the threshold

k

Minimum change value of the signal

EKS

Einklemmschutzaktivierungsschwellwert

x ₀

event position

Claims (27)

Control device of an adjusting device of a motor vehicle, in particular a motor vehicle window lifter, with a computing unit for controlling a drive of the adjusting device, wherein the arithmetic unit is set up to stop an adjustment movement of the drive or to start a process for stopping the adjustment movement of the drive, if a signal correlating to the torque of the drive (F, F (x), F (t)) has a response threshold (s (x), s ₁ , s ₂ ), and to reduce the response threshold (s (x), s ₁ , s ₂ ) in response to an increasing temporal or spatial change (dF / dt, dF / dx) of the signal (F, F (x), F (t)). Control device according to claim 1,
characterized in that
the arithmetic unit is set up to change the response threshold (s (x), s ₁ , s ₂ ) only under the condition that the temporal or spatial change (dF / dt, dF / dx) of the signal (F, F (x), F (t)) exceeds a minimum change value (k). Control device according to one of the preceding claims,
characterized in that
the arithmetic unit is set up to change the threshold (s (x), s ₁ , s ₂ ) additionally as a function of the course of the preceding signal (F, F (x), F (t)). Control device according to claim 3,
characterized in that
the arithmetic unit is additionally set up for averaging the signal (F, F (x), F (t)). Control device according to one of the preceding claims,
characterized in that
the arithmetic unit is set up to change the response threshold (s (x), s ₁ , s ₂ ) additionally as a function of an absolute rotational speed (n) of the adjusting device. Control device according to one of the preceding claims,
characterized in that
the arithmetic unit is set up to change the response threshold (s (x), s ₁ , s ₂ ) additionally as a function of a stiffness of the adjusting device. Control device according to one of the preceding claims,
characterized in that
the arithmetic unit is set, the change is the threshold (s (x), s ₁ , s ₂ ) for temporal or spatial change (dF / dt, dF / dx) of the signal (F, F (x), F (t)) mathematically to correlate. Control device according to claim 7,
characterized in that
the correlation is the change of the response threshold (s (x), s ₁ , s ₂ ) as a function of a characteristic map, in that the change values of the response threshold (s (x), s ₁ , s ₂ ) of the temporal or local change (dF / dt, dF / dx) of the signal (F, F (x), F (t)). Control device according to claim 7,
characterized in that
the correlation is the change of the threshold (s (x), s ₁ , s ₂ ) depending on a mathematical function, by the temporal or spatial change (dF / dt, dF / dx) of the signal (F, F (x) , F (t)) serves as input. Control device according to claim 9,
characterized in that
the mathematical function has a continuous function, in particular proportional to the lowering of the response threshold (s (x), s ₁ , s ₂ ) of the temporal or spatial change (dF / dt, dF / dx) of the signal (F, F (x), F (t)). Control device according to claim 9,
characterized in that
the mathematical function is a step function. Method for controlling an adjusting device of a motor vehicle, in particular a motor vehicle window lifter, wherein an adjusting movement of a drive of the adjusting device is stopped or a method for stopping the adjusting movement of the drive is started when a signal correlating to the torque of the drive (F, F (x), F (t)) has a response threshold (s (x), s ₁ , s ₂ ), and the response threshold (s (x), s ₁ , s ₂ ) is lowered with increasing positive temporal or spatial change (dF / dt, dF / dx) of the signal (F, F (x), F (t)). Method according to claim 12,
characterized in that
the response threshold (s (x), s ₁ , s ₂ ) is only changed if the temporal or spatial change (dF / dt, dF / dx) of the signal (F, F (x), F (t)) has a minimum change value (k) exceeds. Method according to one of the preceding claims,
characterized in that
the response threshold (s (x), s ₁ , s ₂ ) for a comparison of the exclusively current signal (F, F (x), F (t)) with the response threshold (s (x), s ₁ , s ₂ ) with respect of exceeding the (lowered) threshold (s (x), s ₁ , s ₂ ) is lowered. Method according to one of the preceding claims,
characterized in that
the response threshold (s (x), s ₁ , s ₂ ) is additionally changed in dependence on the course of the preceding signal (F, F (x), F (t)). Method according to claim 15,
characterized in that
for determining the profile of the preceding signal (F, F (x), F (t)), an averaging of the signal (F, F (x), F (t)) takes place. Method according to one of the preceding claims,
characterized in that
the change of the threshold (s (x), s ₁ , s ₂ ) additionally takes place as a function of a stiffness of the adjusting device. Method according to one of the preceding claims,
characterized in that
to change the threshold (s (x), s ₁ , s ₂ ) to the temporal or spatial change (dF / dt, dF / dx) of the signal (F, F (x), F (t)) is mathematically correlated. Method according to one of the preceding claims,
characterized in that
in order to correlate the change of the response threshold (s (x), s ₁ , s ₂ ) as a function of a characteristic map, the change values of the response threshold (s (x), s ₁ , s ₂ ) of the temporal or local change (dF / dt, dF / dx) of the signal (F, F (x), F (t)). Method according to one of the preceding claims,
characterized in that
for correlating the change of the threshold (s (x), s ₁ , s ₂ ) in dependence on a mathematical function by the temporal or spatial change (dF / dt, dF / dx) of the signal (F, F (x) , F (t)) serves as input. Method according to claim 20,
characterized in that
the mathematical function is a continuous function. Method according to claim 21,
characterized in that
as a mathematical function, the lowering of the response threshold (s (x), s ₁ , s ₂ ) of the temporal or spatial change (dF / dt, dF / dx) of the signal (F, F (x), F (t)) is proportional , Method according to claim 20,
characterized in that
the mathematical function is a step function. Window regulator with a drive and an adjustment mechanism for adjusting the Position of the window pane with a control device for controlling the Drive according to one of claims 1 to 11. Digital storage medium, in particular floppy disk, with electronically readable Control signals, which interact with a programmable arithmetic unit can be that a method is carried out at least according to claim 12. Computer program product stored on a machine-readable carrier Program code for performing the method at least according to claim 12, if the program product runs on a computer. Arithmetic program with a program code for carrying out the method at least according to claim 12, when the program product is on a computing unit expires.

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