DE20221489U1 - Method for controlling seat adjuster of motor vehicle, by which the range of adjustment is divided into large number of coded incremental steps monitored by incremental generator and sensor - Google Patents

Abstract

The adjustment range of a seat is divided into a large number of coded incremental steps. At intervals, mechanical position stops (MA1,MA2) are set, monitored by an incremental generator and sensor to determine the actual position of the seat. Before each stop, a soft stop (SS1,SS2) is designated, set, e.g. by the control system based on the occupants weight. Errors in the control and monitoring systems can result in an error between measured and actual positions so that the soft stop requires to be reset. For this, zones (EB1,EB2) are set in which it is permissible to reset the soft stop.

Description

The The invention relates to a control device for controlling a Adjustment of a motor vehicle, in particular a motor vehicle seat adjustment.

A Such control device serves to control an adjusting device, the at least one adjustment path between a first stop and a second stop and at a user action an adjustment of the adjustment within the adjustment is adjustable. Here, the respective adjustment position within the adjustment path (by means known per se for position detection) determined and it becomes a (electrically acting) protective stop in the Adjustment set, depending on from the adjustment position causes an automatic reduction of the adjustment energy, in particular a stopping of the adjusting movement in the region of a mechanical Blocking the adjustment movement. The mechanical blocking can on the one hand by one of the two stops at the limits of the adjustment triggered or otherwise by an obstacle in the adjustment path, such as a parked behind the motor vehicle seat crate.

Under A user action here is an operation of an actuator the adjusting device by the on the corresponding motor vehicle seat understood person with the adjustment of the Motor vehicle seat or a part to be adjusted the vehicle seat changeable is. An electrically protective stop becomes a protective stop understood that not formed by a mechanical stop is, but rather electrically to the adjustment of the Adjuster acts to decelerate this.

Previous Control procedure for Adjustment of motor vehicles use a direct measuring System for determining the adjustment position of a motor vehicle seat. For this purpose detected a potentiometer along the current adjustment position along an adjustment path. Each adjustment position is a resistance value assigned. Due to the direct coupling between resistance value and adjustment movement, no errors occur between the measured Position and the real adjustment position when the measured value off the potentiometer can be read error-free.

by virtue of of high wear Potentiometers for position measurement and the additional wiring required are increasing Position sensing systems for controlling vehicle seat adjusters used to determine the position of the rotary drive movement of the drive motor. For this example, the motor current evaluated or detected the drive movement by means of sensors. Especially Hall sensors can for one be used for such detection. This type of indirect measurement However, the adjustment position by the detection of the drive movement leads to measurement errors due to inaccuracies between the detected position and the real adjustment position, this essential from each other may differ. These inaccuracies can programmatically only be partially corrected. Will an adjustment a motor vehicle seat several times, for example due to frequent driver changes, actuated, this can lead to significant position errors.

The previously described position detection systems for Kraftfahrzeugverstelleinrichtungen be used for the controlled approach of previously stored memory positions, in an adjustment between a first mechanical stop and a second mechanical stop are configurable. to Configuration is exploited that by means of one of the aforementioned Position detection system, the adjustment position within the adjustment is determined.

Next This comfort function is in the range of a mechanical stop a protective stop in the adjustment set to the mechanical load to reduce the adjustment. The protective stop makes it possible dependent on from the specific adjustment an automatic reduction the adjustment energy. This reduction allows a smooth braking the adjustment movement. Ideally, the one to be adjusted reaches Part of the adjusting the stop just not. To this too to ensure, taking into account other factors or tolerances, For example, the drive motor is in the area of the protective stop electronically braked or shut down, resulting in a stop the Adjusting movement of the adjusting device in the area of this protective stop leads.

The In addition, significant positional errors previously described cause a shift of the positions of the protective stops from or to the real mechanical attacks, their position opposite the shift remain fixed. An unfavorable shift the protective stops with increasing distance from the mechanical distances would become one essential limitation of Lead adjustment path, if the protective stops overrun, for example, by inertial force, prevent in the direction of the mechanical stops for stress reasons should.

From the U.S. Patent 5,081,586 It is known to set in the adjustment of a Kraftfahrzeugverstelleinrichtung a protective stop, which passes through a groove zerzurbar is actuated by the user when reaching the protective stop actuates a corresponding switch. As a result, there is the problem that such user actions can result in repeated hard starting of the mechanical limit stops limiting the adjustment path, with a corresponding load on the adjusting device.

From the U.S. Patent 4,881,020 It is known to set stops in a seat adjuster when opening and closing the vehicle door (corresponding to a driver getting in or out).

Of the The invention is based on the problem of a control device to indicate the control of an adjustment of a motor vehicle, the the mechanical load of the adjustment of the adjustment by a reduction in the number of adjustments in the mechanical Stop reduced without the available adjustment significantly limited becomes.

This Problem is solved by a control device for controlling a Adjustment device of a motor vehicle, in particular a motor vehicle seat adjustment, with the features of one of claims 1, error! referral source could not be found., error! Reference source could not be found become. or mistake! Reference source not found. solved. Advantageous developments of the invention are the dependent claims remove.

• – durch eine Nutzeraktion eine Verstellposition der Verstelleinrichtung innerhalb des Verstellweges einzustellen,
• – ein Schutzstopp in den Verstellweg zu setzen, der in Abhängigkeit von der Verstellposition eine Reduktion der Verstellenergie, insbesondere zum Stoppen der Verstellbewegung im Bereich einer mechanischen Blockierung der Verstellbewegung, auslöst,
• – zusätzlich zu dem Setzen des Schutzstopps einen diesem Schutzstop zugeordneten Einlernbereich zu bestimmen,
• – Bereichsgrenzen des Einlernbereichs in Abhängigkeit von einer Positionscharakteristik, insbesondere von der Position zumindest eines der Anschläge, zu bestimmen,
• – im Falle eines Korrekturbedürnisses der Position dieses Schutzstops das Setzen eines neuen Schutzstops zuzulassen, wenn ein insbesondere dem neuen Schutzstop oder dem zugehörigen mechanischen Anschlag zugeordneter Positionswert innerhalb dieses Einlernbereiches liegt.

Thereafter, a control device of an adjusting device of a motor vehicle, in particular a motor vehicle seat adjustment, is provided, wherein the adjusting device has at least one adjustment between a first stop and a second stop. The control device has a measuring unit for determining the respective adjustment position within the adjustment path and a computing unit that is set up

• Set by a user action an adjustment of the adjustment within the adjustment,
• To set a protective stop in the adjustment path which triggers a reduction of the adjustment energy, in particular for stopping the adjustment movement in the region of a mechanical blocking of the adjustment movement, as a function of the adjustment position,
• In addition to setting the protection stop, to determine a learning zone associated with this protection stop,
• To determine range limits of the learning range as a function of a positional characteristic, in particular of the position of at least one of the stops,
• In the case of a correction requirement, the position of this protective stop permits the setting of a new protective stop if a position value allocated in particular to the new protective stop or the associated mechanical stop lies within this teaching range.

According to one advantageous development is provided that the arithmetic unit is set up in addition To set the new protective stop, move this teach-in area.

• – durch eine Nutzeraktion eine Verstellposition der Verstelleinrichtung innerhalb des Verstellweges einzustellen,
• – ein Schutzstopp in den Verstellweg zu setzen, der in Abhängigkeit von der Verstellposition eine Reduktion der Verstellenergie, insbesondere zum Stoppen der Verstellbewegung im Bereich einer mechanischen Blockierung der Verstellbewegung, auslöst,
• – zusätzlich zu dem Setzen des Schutzstopps einen diesem Schutzstop zugeordneten Einlernbereich zu bestimmen,
• – Bereichsgrenzen des Einlernbereichs in Abhängigkeit von einer Positionscharakteristik, insbesondere von der Position zumindest eines der Anschläge, zu bestimmen,
• – im Falle eines Korrekturbedürnisses der Position dieses Schutzstops das Setzen eines neuen Schutzstops zuzulassen, wenn ein insbesondere dem neuen Schutzstop oder dem zugehörigen mechanischen Anschlag zugeordneter Positionswert innerhalb dieses Einlernbereiches liegt, und
• – den Einlernbereich neu zu berechnen in Abhängigkeit einer Blockierung außerhalb der bisherigen den Anschlägen zugeordneten Einlernbereiche und eines Sperrbereichs zwischen den Einlernbereichen.

The invention advantageously further developing a control device of an adjustment of a motor vehicle, in particular a motor vehicle seat adjustment is provided, wherein the adjusting device has at least one adjustment between a first stop and a second stop. The control device has a measuring unit for determining the respective adjustment position within the adjustment path and a computing unit, wherein the computing unit is set up

• Set by a user action an adjustment of the adjustment within the adjustment,
• To set a protective stop in the adjustment path which triggers a reduction of the adjustment energy, in particular for stopping the adjustment movement in the region of a mechanical blocking of the adjustment movement, as a function of the adjustment position,
• In addition to setting the protection stop, to determine a learning zone associated with this protection stop,
• To determine range limits of the learning range as a function of a positional characteristic, in particular of the position of at least one of the stops,
• In the case of a correction requirement, to allow the setting of this protective stop to set a new protective stop if a position value assigned in particular to the new protective stop or the associated mechanical stop lies within this learning range, and
• To recalculate the learning range as a function of a blockage outside of the previous learning ranges assigned to the stops and of a stop band between the learning ranges.

• – durch eine Nutzeraktion eine Verstellposition der Verstelleinrichtung innerhalb des Verstellweges einzustellen,
• – ein Schutzstopp in den Verstellweg zu setzen, der in Abhängigkeit von der Verstellposition eine Reduktion der Verstellenergie, insbesondere zum Stoppen der Verstellbewegung im Bereich einer mechanischen Blockierung der Verstellbewegung, auslöst,
• – zusätzlich zu dem Setzen des Schutzstopps einen diesem Schutzstop zugeordneten Einlernbereich zu bestimmen,
• – Bereichsgrenzen des Einlernbereichs in Abhängigkeit von einer Positionscharakteristik, insbesondere von der Position zumindest eines der Anschläge, zu bestimmen,
• – im Falle eines Korrekturbedürnisses der Position dieses Schutzstops das Setzen eines neuen Schutzstops zuzulassen, wenn ein insbesondere dem neuen Schutzstop oder dem zugehörigen mechanischen Anschlag zugeordneter Positionswert innerhalb dieses Einlernbereiches liegt, und
• – eine Entfernung zwischen einem ersten Schutzstop des ersten mechanischen Anschlags und einem zweiten Schutzstop des zweiten mechanischen Anschlags mit einer Mindestdistanz zu vergleichen und zumindest einen der Schutzstops zu ändern, wenn die Entfernung gleich oder kleiner ist als die Mindestdistanz.

A further development provides an adjusting device of a motor vehicle, in particular a motor vehicle seat adjustment, wherein the adjusting device has at least one adjusting path between a first stop and a second stop. The control device has a measuring unit for determining the respective adjustment position within the adjustment path and a computing unit, wherein the computing unit is set up

• Set by a user action an adjustment of the adjustment within the adjustment,
• To set a protective stop in the adjustment path which triggers a reduction of the adjustment energy, in particular for stopping the adjustment movement in the region of a mechanical blocking of the adjustment movement, as a function of the adjustment position,
• In addition to setting the protection stop, to determine a learning zone associated with this protection stop,
• To determine range limits of the learning range as a function of a positional characteristic, in particular of the position of at least one of the stops,
• In the case of a correction requirement, to allow the setting of this protective stop to set a new protective stop if a position value assigned in particular to the new protective stop or the associated mechanical stop lies within this learning range, and
• - Compare a distance between a first stop of the first mechanical stop and a second stop of the second mechanical stop with a minimum distance and change at least one of the protective stops when the distance is equal to or less than the minimum distance.

advantageously, the protective stop is not ineffective by a user action switchable. Not ineffective by a user action Switchable protective stop is understood to be a stop that - regardless of a possible User Action - one Reduction of the adjustment energy with the aim of slowing down or the stopping of the adjustment causes, when the adjustment position corresponds to the position of the protective stop. It is therefore for the user not possible, by operating an adjusting device associated with the adjusting device to run over the protective stop. The user can therefore not directly on the actuator of the adjustment act on the protective stop and switch it ineffective, i. e., that the adjustment movement is independent from a possible User action unchanged will continue.

A possible Embodiment of the invention provides that a by the user not inactively switchable protective stop for reducing the mechanical Loading the adjustment system can be used without affecting the user to disposal standing adjustment to restrict too strong, when setting this Protective stops certain conditions dependent on the adjustment movement Fulfills are that prevent a non-drivable (not ineffective switchable) protective stop is set at a location that leads to a unnecessary restriction the adjustment path led.

at The protective stop is preferably an electrical one acting protective stop, the automatic reduction of Verstellergie causes when reaching an adjustment position during the adjustment which corresponds to the position of the protective stop.

In a preferred embodiment of the invention the protective stop is ineffective only by an evaluation logic, constantly monitors the adjustment of the adjustment and evaluates, in particular based on the history of the individual Verstellereignisse. The adjustment events may in particular be a stopping of the Adjustment movement (e.g., due to a protective stop or when reaching one of the mechanical stops or any other blocking) as well as the beginning of a Adjustment movement (approach of the adjustment) or a change of direction the adjustment movement.

The Ineffective switching of the protective stop takes place by means of the evaluation logic especially for the purpose of setting a new protective stop, ie Correct the position of the protective stop. The conditions necessary for a correction the position of the protective stop must be able to relate to the time and number of the aforementioned Verstellereignisse.

One Guard stop preferably has a positional parameter that the intended by the protective stop effect of a certain adjustment position assigns. Furthermore, the protective stop preferably has an effect parameter on, who with the desired Effect related functionality the protective stop assigns the same. A desired effect is, for example the reduction of the adjustment energy in the direction of the previously detected Blocking. While in the opposite direction, ie in the direction of increasing distance preferably not reduced by the blocking the adjustment energy becomes. Different functional modes or modes of action can be used be assigned to different adjustment modes. For example, can in a normalization mode after the protection stop condition Stopping at a low adjustment speed in one of the stops to normalize the current adjustment position.

Of the Protective stop should therefore in particular stop the adjustment movement in the area of one of the attacks cause.

Other aspects of the invention relate to the device of the arithmetic unit, which in the following in process steps of a possible Programmab are shown running.

According to one Aspect of the invention is additional for setting the protective stop assigned to this protective stop Learning range determined. This assignment serves an active relationship between this protective stop and the learning area. The learning area controls the local Boundary conditions for teaching in a new protective stop, so within that Teaching a setting of a protective stop is allowed, wherein this newly set protective stop assigned to the respective stop is and thus in the direction of the stop a reduction of Verstellergie allows. The admission of setting a protective stop indicates that a setting a related matter new protective stops in this area of even further criteria dependent can be, but locally between the range limits of this learning range, excluding negative further criteria.

One new protective stop is then set if a correction need of the Value of the previous protective stop is present. For example, the count across from substantially displaced the real position of the mechanical stop, So that the previous position of the protective stop no sufficient reduction the adjustment energy ensured before the adjusted part touches the stopper. Is it the expected one Shifts within the training range limits will be as before described procedure. If the position value of the protective stop is the stop or a correlated value outside This teach-in area does not become a protective stop assigned to this stop set. However, you can other measures be taken or other not this attack associated protective stops be set.

To the Determining the learning range becomes the range limits of the teach-in range dependent on determined by a positional characteristic. In particular, this is Position characteristic, the position of the associated stop itself, so that the limits of the learning range from this position of the stop easy and low-tolerance to calculate. Alternatively, too other positional characteristics, such as detection used a certain adjustment position by means of position detector to calculate the range limits. The breadth of the learning area, for example 20 mm, depending on calculated from the position of the stop so that in normal operation the Kraftfahrzeugverstelleinrichtung a shift between determined position and real adjustment position in general smaller than the width of the learning area. On bigger, unexpected Shifts, the control process can then react differently.

In An advantageous embodiment of the invention is for the determination the Einlernbereiches a blocking of the adjustment to a the attacks determined, and the range limits of the learning range are in dependence from the adjustment position associated with the blocking of the adjusting movement calculated. Alternatively, the position calculation can also be a protective stop be used. Advantageously, the range limits calculated such that the blocking position is on or within the range limits.

A advantageous development of the invention provides that the first mechanical stop a first learning area and the second mechanical stop is associated with a second teaching area, and between the first teaching area and the second teaching area a blocking area is provided. This blocking area in turn serves as local Boundary condition for the setting of a protective stop, such that the setting in the restricted area a new protective stop assigned to the mechanical stop is prevented.

According to one advantageous embodiment of this embodiment of the invention will at least one of the set protection stops deactivated, if within the blocking area determines a blocking of the adjusting movement becomes. The deactivation causes this previous protective stop run over in the direction of the assigned mechanical stop can not, the adjustment energy is not automatically reduced becomes. But later subsequently again a block within the learning area detected, the protective stop can be reactivated and also repositioned become.

If an adjustment position outside the previous learning ranges and the stop band is determined, In an advantageous development of the invention, all the learning areas and set protection stops disabled. This causes the setting a new protective stop associated with a mechanical stop will, locally independently is because no teaching areas are active. Will be a blockage detected on a mechanical stop, a protective stop is set and the associated one Calculated learning range in a computing unit and both non-volatile stored.

An advantageous development of the invention provides that the distance between a first protective stop of the associated first mechanical stop and a second protective stop of the associated second mechanical stop is compared with a minimum distance. The minimum distance is read from a memory. The minimum distance is given as empirical value and can be, for example, 80 percent of the desired adjustment path or the minimum distance calculated from undisturbed adjustments in the two stops during the tape end assembly of the motor vehicle from the distance of the two stops.

If the distance becomes equal to or less than the minimum distance becomes advantageously, at least one of the protective stops is changed, in particular moved or deactivated. For larger occurring ones Position error, it is advantageous that both protective stops and the associated Teach-in areas are disabled if the distance is equal or less is considered the minimum distance. Such is the adjustment system, in particular the protective stops, re-normalized when blocking by a the attacks is detected.

In An advantageous embodiment of the invention is the adjustment speed at least reduced within the learning areas. Are no protective stops is set, with a high probability of blocking state of the adjustment system to one of the stops, resulting in a high mechanical Load of the adjustment system caused. To reduce this is exercised on the attack Power significantly reduced by the speed reduction.

Advantageous becomes dependent from the determination of a first position of the first mechanical Stop associated first protective stops a second position of the second protective stops associated with the second mechanical stop certainly. This is in a preferred embodiment of the invention achieved in that the adjustment is mapped to a virtual position axis. On this virtual Position axis are the position of the first protective stop and the Position of the second protective stop position-dependent from the first protective stop firmly arranged. The current adjustment of the adjustment between the attacks is assigned to a position value on the virtual position axis, this virtual position axis to the adjustment path, preferably to the attacks, is aligned when a shift of the virtual position axis is determined to the adjustment.

As a result, the positions of the two protective stops are always in a fixed local position relationship to each other, for example, have a fixed distance from each other on. With the shift of the position value on the virtual The axis is preferably the position value also to the protective stops shifted, with the protective stops on the virtual axis remain stationary.

In addition to the setting in particular of the first protective stop becomes a protective stop assigned teaching area determined. This assignment serves one Interaction between this protective stop and the learning area. The learning area controls the local Boundary conditions for a teaching a new protective stop, such that within this learning area is allowed to set a protective stop, wherein this newly set protective stop assigned to the respective stop is and thus in the direction of the stop a reduction of Verstellergie allows. The admission of setting a protective stop states that a set a related matter new protective stops in this area still depend on further criteria can, but locally between the range limits of this learning range, excluding negative further criteria.

One new protective stop is then set if a correction need of the Value of the previous protective stop is present. For example, the count across from substantially displaced the real position of the mechanical stop, so that the previous position of the protective stop is not sufficient Reduction of the adjustment energy ensured before the pretended Part touched the stop. Are they expected shifts within the training range limits The procedure is as described above. Is the position value of the Protective stops, the stop or a correlated value outside This teach-in area does not become a protective stop assigned to this stop set. However, you can other measures be taken or other not this attack associated protective stops or set by a user ineffective switchable protective stops become.

For the determination and further refinements of the teaching area, reference is made to the description of the DE 101 59 136 directed.

In an alternative embodiment of the invention is in the case of correction need the position of one of the protective stops the error of the position of this Protective stops determined. Subsequently or at the same time the desired position determines this protective stop and corrects it. Dependent on from this current position, the position of the other, the determined other stop associated protective stops and corrected. In this variant of the invention, the positions of both protective stops in relation to corrected each other. This ratio is preferably one fixed distance or in an alternative embodiment of the invention a minimum distance, which are also exceeded can, for example, a settlement behavior of the adjustment system to be taken into account. This minimum distance between the first stop and the second Protection stop can be specified or determined. The investigation For example, depending on from the measurement of a normalization run.

For the use a virtual axis is preferably the adjustment one Assigned position value, which is assigned to the assignment is changed by the adjustment of the adjustment. While this is Assignment not for the application of a virtual axis limited, but particularly advantageous for them used. The position value is corrected when a shift of the position value to the current adjustment position is determined. For correction, the current position value is changed relative to position Position of at least one protective stop on this current adjustment position set. The protective stops can on the other hand remain stationary. These are the protective stop positions advantageously as for the correction constant Values preferably non-volatile saved. For correction, the current position value is on this set current adjustment position, being relative to each other dependent Positions of the first guard stop and the second guard stop the position value changed becomes.

to Assignment of the adjustment position to the position value is the position value in an advantageous embodiment of the invention, a count, in dependence from the drive movement of a drive of the adjusting device is incremented or decremented. For this example, Hall sensors or "ripple count" measuring method used become.

Around correcting the position value becomes dependent on one for blocking associated with the adjustment Adjustment position the current position value calculated or from a Register of a memory read out, so that the first protective stop in the area of the first mechanical stop and the second protective stop is positioned in the region of the second mechanical stop.

In An advantageous embodiment of the invention is at least one the protective stops deactivated when a shift of the position value to determined current mechanical adjustment in the adjustment becomes. The shift of the virtual position axis to the adjustment path is preferably dependent from an adjustment position associated with the blocking of the adjustment movement calculated so that the first protective stop in the area of the first mechanical Stop and the second protective stop in the area of the second mechanical stop is positioned. Before such a correction is advantageously at least one of the protective stops immediately disabled when a shift the virtual position axis is determined to the adjustment.

In An advantageous development of the invention is the first mechanical Stop a first learning area and the second mechanical stop assigned a second learning area. Between the first learning area and the second teaching area is provided with a blocking area. At least one of the protection stops will be disabled if inside the blocking area determines a blocking of the adjusting movement becomes. Advantageously, the range limits of the learning ranges are as well stored fixed positions and to the respective protective stop position in a fixed relation.

According to one Another aspect of the invention is in the case of detection of the mechanical Blocking an ineffective switchable by a user action Protective stop set. The mechanical block becomes, for example detected by a stoppage of the drive axle of the adjustment. For detection can in addition to the previously mentioned Example all sensations of movements, forces, currents or the like used which are a distinction between an adjustment movement and allow blocking. In the case of this detection of mechanical blocking becomes Protective stop set in the adjustment, which is positioned locally to the blocking is. This protection stop has the functionality that the same through a user action can be switched ineffective. The user action is an action, for example an actuation of an operating device, the person adjusting the adjusting device in position would like to. This is, for example, the driver of a motor vehicle, the Motor vehicle seat in the seat longitudinal direction would like to adjust.

Becomes the protective stop by the user ineffective, has this As a result, the effect of the protective stop at least temporarily canceled becomes. In particular, after a done by the protective stop Stop the adjustment movement a lock for another procedure in the same adjustment canceled when the protective stop by the user is switched ineffective. In addition to the simple and switching off the effect of the protective stop to protect the mechanics, ie in particular the locking of the adjusting movement in the blocking, It is also possible to switch between different functional modes of the protective stop take place, however, cancel the blocking effect at least temporarily and thus the protective stop in its blocking effect in the direction of Blocking ineffective switching. This can be done for example as "overpressure", by a renewed actuation by the user in the same adjustment direction, ie in the direction blocking, after stopping due to a stop again Adjusting movement leads, which is limited for example by the blocking.

This ineffective switchable protective stop is replaced by a protective stop independent of this user action, if one of the adjustment movement dependent condition is met. The protection stop independent of the user action prevents the suspension of the blocking by the user, so that a procedure of the adjustment device caused by a user action in the blocking is not possible. Consequently, the protective stops previously executed differ in function mode with regard to the authorized or unauthorized user action.

The Method is advantageously applicable to control an adjustment a motor vehicle, in particular a motor vehicle seat adjustment with an adjustment path between a first mechanical stop and a second mechanical stop. Furthermore, it is necessary that determines an adjustment position within the adjustment path is assigned to the protective stops this adjustment position and a local one dependence to achieve the effects of these protective stops.

The Replacement of the switchable protective stop by the independent protective stop is subject to the condition which depends on the adjustment movement is. These conditions are in particular plausibility checks, the one unwanted restriction to minimize the travel path. So as possible to allow far-reaching adjustment, the fulfillment of this Condition, which is also composed of several combined conditions can be checked, in particular by means of an algorithm.

The Different types of conditions are divided according to the Sub-tasks of the invention in several main variants, advantageously as components of the condition can be combined.

The Invention should enable the condition for the adjustment movement particularly characteristic adjustment positions to check. This is in a further developing main variant of the invention, the condition depends on an adjustment movement in one of the stops. Here are the attacks both a significant adjustment position, with the adjustment is limited in one direction, as well as a significant Verstellcharakteristik due to a deceleration of the adjusting movement in a method in the attacks on.

Around to obtain a maximum displacement, are preferably the Determines positions of the limit limiting stops. In particular, if these only by their relative position to each other can be recognized is in an advantageous development of this main variant as Condition the position of the blocking in the adjustment against determined stop. If both positions are known, can from local dependencies, for example, from the relative position to each other or the position blockages to certain learning areas, to blocking at both stops getting closed. The condition for replacing the ineffective switchable Protective stops by the user stop independent protection stop is in this Case fulfilled. The order, whether first the opposite stop or the the stop associated with the current block is protected with an independent stop, is arbitrary.

alternative or in combination to evaluate the local dependencies The blocking can also be the Verstellcharakteristik at a block for the Condition be used. For this purpose, in an advantageous variant the invention for the blocking evaluated the course of an adjustment variable. The adjustment size is for example the instantaneous speed, the acceleration or a control parameter a speed control their course over time or over the Way is evaluated. Advantageously, as a condition of this Course one for associated with a stop characteristic course of the adjustment. This mapping can be done, for example, by convolution or another solved mathematical algorithm which outputs a comparison result of the comparison of at least two courses.

alternative to this variant can by using additional hardware as a condition the blockage is sensed at one of the stops. For this purpose points the stop or the moving part of the adjustment a sensor that detects the impact forces. obstacles in the adjustment can on the other hand do not affect this sensor.

moreover It should be ensured that not deviations from the optimal adjustment to the result of this condition check. In an advantageous further variant of the invention is therefore for the Plausibility check of the Condition determines the inaccuracy of the specific adjustment position. The inaccuracy can be caused by different external or system immanent influences become. This inaccuracy may already be due to error probabilities the validity significantly influence the outcome of the condition. Advantageously allowed as a condition the inaccuracy does not exceed a maximum value. This maximum value ensures that the travel restriction is set to still tolerable measure limited becomes.

In an advantageous embodiment of the invention, a number of adjustments is determined as a measured value for the inaccuracy. For this purpose, for example, the number of operations by the user can be counted. Due to the adjustment System caused errors in the adjustment position when starting or braking the adjustment, this count can be used as a measure of probable inaccuracies. Advantageously, the exceeding of the number of adjustments over a maximum value is checked as a condition. If this maximum value is exceeded, the condition is not fulfilled, and as a result the ineffective switchable protective stop is not replaced by a protective stop independent of the user action.

Farther is particularly advantageous that the inaccuracy by a number the direction change of the adjustment is determined. Due to elastic Deformations of the drive mechanism of the adjusting is at a change of direction of the adjustment this drive mechanism of one biased in the opposite direction. This extra Lead spring paths to significant errors in the determination of the adjustment position, which in turn errors in the location-dependent positioning of the independent protective stops can cause. Consequently, it is advantageously evaluated that as a condition the number of changes of direction of the adjustment a maximum value does not exceed.

Farther can Error of the evaluation itself, caused by the electronics become, to a faulty positioning of the protective stop and consequently to an undesirable Verfahrwegseinschränkung to lead. In an advantageous embodiment of the invention, these Error of the electronics as condition with checked, in particular the Inaccuracy by determining a detected intrusion the supply voltage of the adjusting device is determined. For this purpose, advantageously as a condition of the collapse of the supply voltage not while detected an adjustment. Such a collapse of the supply voltage could for example, a faulty detection of the adjustment by cause a lag of the adjustment during the break-in. Other errors of the electronics are, for example, a faulty Storage of the adjustment position or an error in the program sequence a computing unit.

is a normalization in the attacks undesirable, because the mechanical. caused by the normalization in the attacks Loading of the adjustment system should be further reduced, advantageously individually or in combination with the stops further conditions dependent on the adjustment evaluated. In a further main variant of the invention as a condition independent of a blocking adjustment in the adjustment between the attacks sensed. To do this Sensors are provided, which have a one-to-one adjustment position detect within the adjustment path for normalization. This detection is used to normalize the specific adjustment position. To the others may as a condition a maximum deviation between the determined Adjustment position and the normalization position can be used.

Stand further functions, in particular for the protection of the motor vehicle occupants to disposal, is in an advantageous further variant of the invention by means of a pinch detector pinching objects or Persons detected by the adjustment of the motor vehicle. These Detection of a pinch case is advantageously used to the validity the detection of the blockage at one of the stops by means of to check the condition. For this as a condition before the replacement, no pinching has been detected.

can the adjusting be adjusted so that no object or body a vehicle occupant is in the adjustment is this advantageously additionally evaluated. According to one Another variant of the invention, the adjustment in operated in different operating modes. Here is the adjustment in a normalization mode operable, for example, in a Workshop or during a locked state of the motor vehicle is usable. there takes place as condition dependent on these adjustment conditions in this normalization mode the blockage at the stops. A blockage on another item may be in this normalization mode be excluded.

To replace the protective stop the user will be determined in the simplest possible way, whether the protective stop should be switched ineffective and therefore should be carried out an adjustment beyond this protective stop. According to one embodiment of the invention, the user's will is determined based on the operation of an operating device. Advantageously, the user action corresponding to the user will be carried out by the manual operation of an operating device for controlling the adjusting device. This operating device consists for example of switches, which can be used to control the adjustments of the individual adjustment of a seat adjustment. If the operating device is actuated again by means of this user action, the adjusting device is moved beyond the protective stop. If the blockage has previously been caused, for example, by a banana box which has already been removed from the adjustment path at the time of the user action, the user action may result in the adjustment beyond this protective stop, ideally up to the limiting stop. In this case, the previous ineffective switchable protective stop can be deactivated or deleted, since the assumption of blocking by the banana box no longer applies. The deletion or deactivation takes place, for example, depending on the user action.

advantageously, the number of actuation events is checked. Preferably the user action is carried out by the renewed manual operation of the the Verstellbewegungsrichtung associated actuating element of the operating device after setting the ineffective switchable protective stop. Is the User will find that the set ineffective switchable Run over protective stop Under User Action Analysis is a procedure over the Guard stop without or alternatively with a stop at the desired Position possible. Insofar it can be concluded on the user will that after a Stop stop the adjustment movement a continuation the adjustment in the direction of blocking by the user is desired. For example, an additional key may be provided which is a method without Stop at the ineffective switchable protective stop allows.

Should an accidental re-actuation or a wrong operation a method of the adjustment in the detected blocking exclude, In an advantageous development of the invention, the user action takes place through manual operation a Freigabebetätigungselementes. This Release actuator For example, an additional Switch or a combined actuation of several buttons, which allow at least one additional control in double function. This release actuator For example, before a procedure beyond the protective stop, the User action activated and lifted the lock in the direction of the detected lock.

Around Being able to influence the user's intention is advantageous Development of the invention provided that the user action interactively means an input unit and an output unit between the adjusting device and the user. This allows the user information about the Condition of the adjustment system are transmitted and the user can for example remove obstacles in the travel path, to allow a re-normalization of the attacks.

There a protective stop at least one assignment to an adjustment position and another assignment to a desired effect are different variants for replacing the ineffective switchable protective stop by that of the User action independent Protective stop possible. Both in the following variants of the invention is common that maximum one of the two protective stops is active. It can alternatively Both protective stops be active, with the adjustment already reduced with the achievement of one of the two active protective stops becomes.

A Variant of this development of the invention provides that for Replacement of ineffective switchable protective stop by the of the user action independent Protective stop this protective stop of ineffective switchable to independent of the user action Protective stop changed becomes. A change the adjustment position, however, is not mandatory if an absolute normalization is not necessary. However, a standardization can be beneficial to the positions of memory position to the adjustment position to assign simplified.

In an alternative preferred variant of the invention is for replacement the ineffective switchable protective stop by the user action independent Protective stop the ineffective switchable protective stop cleared. This Protective stop is due to the replacement for protection from the procedure no longer needed in the stop, because the user-independent protection stop activates becomes. This independent Protective stop can be positioned at a fixed distance from the stop, because the adjustment is realigned to this stop.

According to an advantageous development of the invention, the setting of a first protective stop assigned to a first blocking causes a second protective stop to be set on the basis of this detection of the mechanical blocking, which is assigned to the stop opposite to the blocking in the adjustment path. Upon reaching this second protection stop, both protection stops are replaced by protection stops independent of the user action. This is particularly advantageous because a protective stop can already be set without a blockage leading to a load on the adjusting device. At least with a certain probability, this protective stop can be achieved without a prior blockage, so that the adjustment system recognizes that a sufficient travel path is available. If this second protective stop is not reached in the event of a renewed blocking in the adjustment path, a second protective stop of the current blocking in the adjustment path is again set opposite. Again, there is a certain likelihood of reaching this protective stop, which would in turn prevent an additional, the adjustment system incriminating blocking. The set protective stop is preferably a protective stop which can be switched ineffectively by a user action, so that temporary obstacles do not lead to a permanent blocking of this protection lead stop point. In this case, the condition dependent on the adjusting movement is preferably the reaching of the second protective stop. Advantageously, the current blocking in the adjustment opposite protective stop is set with a minimum distance away. The predeterminable or determinable minimum distance extends between the current blocking or the set first protective stop and the opposite protective stop. The minimum distance depends on a desired travel path.

The Minimum distance can be determined, for example, in a standardization be or for an automobile seat type are stored. The minimum distance This is read out of a memory. The minimum distance is for example, given at the beginning as an empirical value and can For example, be 80 percent of the desired adjustment or the minimum distance is from undisturbed adjustments in the two attacks during the Bandendmontage the motor vehicle from the distance of the two attacks calculated. If the distance is equal to or less than the minimum distance, the ineffective switchable protective stops are not replaced.

The Ineffective switchable protective stops, however, can be deleted, in particular but also be moved or deactivated.

Around an overflow a position counter To avoid and simplify the seating memory positions of the current Assign adjustment position is in a particularly advantageous Further development of the invention, the adjustment position a position value assigned. This position value is used for assignment depending on changed by the adjustment of the adjusting, in particular revolutions or Angular parts of the revolutions of the drive shaft by a magnetic Hall system counted become. Because this assignment, as previously exemplified, error-prone is, the position value is preferably corrected when a shift of the position value to the current adjustment position is determined. Such a shift is for example at a stop determined if the position value does not match the adjustment position match the stop. In this case, the current position value is preferably used for correction set to this current adjustment position, so that the mechanical adjustment axis Aligned to the virtual position value axis.

A preferred embodiment of the development of the invention provides that the position value is corrected when that of the adjusting movement dependent conditions met is. So the probability can be reduced by that Position error or incorrect assignment of the blockage to a stop the position value to a faulty adjustment position is aligned and these axes are still shifted from each other.

In A further advantageous embodiment of the invention is in addition to the protective stop a teach-in area assigned to this protective stop certainly. The range limits of this teach-in area are displayed in dependence from the same protection stop position or blockage. In case of a correction need the position of the same protective stop is set by a new protective stop approved, in particular if the new protective stop or the Blocking assigned position value lies within this teach-in range. Preferably, the range limits of the teach-in area are set, if the learning area is assigned to the protective stop independent of the user action becomes.

These Assignment between protective stop and teach-in area serves for an active relationship between this protective stop and the learning area. The learning area controls the local Boundary conditions for a learning of a new protective stop such that within this Teaching a setting of a protective stop is allowed, wherein this newly set protective stop preferably the respective stop is assigned and thus in the direction of the stop a reduction allows the adjustment energy. The admission of setting a protective stop states that a set a related new Protective stops in this area still depend on further criteria can, but locally between the range limits of this learning range, excluding negative further criteria.

One new protective stop is then set if a correction need of the Value of the previous protective stop is present, or not yet this Stop assigned protective stop was determined. For example is the count across from substantially displaced the real position of the mechanical stop, so that the previous position of the protective stop is not sufficient Reduction of the adjustment energy ensured before the pretended Part touched the stop. Are they expected shifts within the training range limits The procedure is as described above. Is the position value of the Protective stops, the stop or a correlated value outside This training area is preferably temporarily ineffective switchable Protective stop set.

To determine the learning range, the range limits of the learning range are determined as a function of a position characteristic. In particular, this positional characteristic is the position of the associated stop itself, so that the limits of the teach-in range from this position of the stop can be calculated easily and with low tolerances. Alternatively, other positional characteristics, such as a detection of a particular displacement position by means of a position detector, can be used to calculate the range limits. The width of the teach-in range, for example 20 mm, is calculated as a function of the position of the stop such that, during normal operation of the motor vehicle adjustment device, a displacement between the determined position and the real adjustment position is generally smaller than the width of the teach-in area. The control process can then deviate from this response to larger, unexpected shifts.

In An advantageous embodiment of the invention is for the determination the Einlernbereiches a blocking of the adjustment preferably at one of the stops determined, and the range limits of the learning range are in dependence from the adjustment position associated with the blocking of the adjusting movement calculated. Alternatively, the position calculation can also be a protective stop be used. Advantageously, the range limits calculated such that the blocking position is on or within the range limits.

A advantageous development of the invention provides that the first mechanical stop a first learning area and the second mechanical stop is associated with a second teaching area, and between the first teaching area and the second teaching area a blocking area is provided. This blocking area in turn serves as local dependent on the adjustment movement Condition for the setting of a user action independent protective stop, so, that in the blocked area, the setting of a user action independent, the mechanical stop associated protective stops is prevented.

According to one advantageous embodiment of this embodiment of the invention will at least one of the set protection stops, both from the user action can be switchable, as well as independent of the user action protective stops, disabled, if within the restricted area a blocking of the adjusting movement is determined. The deactivation causes the previous protective stop in Drive over direction to assigned mechanical stop can not, the adjustment energy is not automatically reduced becomes. But later subsequently again a block within the learning area detected, the protective stop can again as ineffective switchable protective stop be activated and also repositioned.

If an adjustment position outside the previous learning ranges and the stop band is determined, In an advantageous development of the invention, all the learning areas and set protection stops disabled. This causes the setting a new protective stop associated with a mechanical stop will, locally independently is because no teaching areas are active. Will be a blockage detected, at least one ineffective switchable protective stop set and the associated Calculated learning range in a computing unit and both non-volatile stored.

In An advantageous embodiment of the invention is the adjustment speed at least reduced within the learning areas. Are no protective stops is set, with a high probability of blocking state of the adjustment system to one of the stops, resulting in a high mechanical Load of the adjustment system caused. To reduce this is exercised on the attack Power significantly reduced by the speed reduction.

As described in the method, the adjusting device at least an adjustment between a first mechanical stop and a second mechanical stop on. An adjustment position is within the adjustment determined. The determination of the adjustment position for example, by counting of pulses generated by a displacement sensor.

In a predetermined distance to one of the mechanical stops is a protective stop in the adjustment set, the protective stop dependent on from the specific adjustment an automatic reduction the adjustment energy to stop the adjustment of the adjustment in the range of a mechanical blocking of the adjustment allows. The predeterminable distance is preferably in a memory deposited and can be updated at the storage location in case of need become.

in the Case of detection of the mechanical block becomes a first set by a user action ineffective switchable protection stop. Such a user action is, for example, a release the movement in the blocking direction, so that the effect of ineffective switchable protective stops by the user, for example manually can be lifted.

At the same time or subsequently, a second protective stop, which can be switched ineffectively by a user action, is set, which is assigned to the stop opposite to the blocking in the adjustment path and is removed from the first protective stop by a predeterminable or calculated minimum distance. This minimum distance, for example, before de be Finished. A check of this minimum distance is possible during a normalization run in which both endpoints of the minimum distance must be approachable. If the travel path during the check by the original normalization is smaller than the minimum distance, a faulty original normalization is detected, which can be used to control a specific operating mode or to display an error. Likewise, the minimum distance can be calculated by measuring the maximum travel distance from the distance between the two stops and subtracting from this maximum travel distance the presettable distances associated with the respective stop.

Of the first and the second ineffective switchable protective stop are respectively be replaced by a protective stop independent of this user action, if the adjustment position, the position of the second ineffective switchable Protective stops reached. Preferably, the protective stops are replaced when additionally an adjustment dependent condition Fulfills is. This condition is, for example, that the adjustment movement between the positions of the two protective stops a maximum number of changes of direction. Alternatively, you can Also, the time between the two protective stops a maximum value do not exceed. is the condition is not fulfilled, continue to be used ineffective switchable protective stops that only be replaced when the condition is met.

in the The following are traversing states described the specific reactions of the control algorithm require the control method. The reactions in the control process are advantageous embodiments of the invention.

In In a first traversing state, there are no or only small errors between the mechanical position and that determined by a control device Position occurred. Consequently lets the adjusting over adjust the travel distance between the two protective stops. At the protective stops the adjustment energy is automatically reduced as described above, so that the part to be adjusted is stopped before the respective stop. The stored memory positions are active, so that the adjustment in these memory positions by the user by printing the appropriate Memory key can be adjusted automatically. The small mistakes can over however, add the adjustment time to a significant error, so that the Traverse increasingly limited could be. To counteract this is when an error correction condition Fulfills is disabled, at least one of the two protective stops and the realigned position at a subsequent blockage at one of the stops.

In a second process status is the specific adjustment position outside the area between the two protective stops, although both protective stops can be active. This can be caused for example by a software error or a jump of the counter due to bit manipulation in memory. In In this case, at least one of the protective stops, preferably both protective stops, disabled or deleted. The meter reading the particular adjustment position is set to an average in the Center of the travel path reset as default value. The saved Memory positions are deactivated or also on this average set until one of the stops is reached, the protective stops are activated accordingly, so that the previous memory positions reactivated or new memory positions can be activated.

in the third method state, a blocking is detected. These Blocking can occur between the two protective stops or, if not are activated outside of the area between the two protective stops are detected. following Consequently, the protection stops are deactivated, if not already has happened. The specific adjustment position will now be on this mechanical stop assigned value, so that the protective stops according to the original standardization again in positional position to the mechanical stops are. Subsequently, the first and the second ineffective switchable Protective stop set. A run over this protective stops is in the direction of increasing distance from the respective stop possible. If one of these protective stops is switched by the user ineffective and moving the adjusting device in the direction of blocking, the ineffective switchable protective stop is deactivated if a Blocking is not detected at the previous location.

The Memory positions remain continuously relative to the positions of the Protective stops. These memory positions become with the detection of a Blocking not changed, but with the protective stops together to the detected mechanical Blocking realigned.

For further details of the control procedure, see DE 102 19 284 directed. Furthermore, this control method can be advantageously supplemented by correction methods. Thus, the counts can be weighted according to the determined direction after switching off the motor voltage. Also determined voltage dips and the trailing behavior of the adjustment can be determined to correct.

In the following the invention will be described with reference to exemplary embodiments with reference to explained in more detail.

there demonstrate

1 a schematic representation of an adjustment of an adjustment with position data for control,

1a a schematic representation of shifted position data,

1b a schematic representation of two shifted protective stops,

2 a schematic representation of a further adjustment of an adjustment with position data for control,

2a a schematic representation of shifted position data,

2 B a schematic representation of two shifted protective stops,

3a a first part of a schematic process flow in the form of a flow chart, and

3b a second part of the schematic process flow.

In 1 is a displacement VW a motor vehicle seat adjustment shown schematically. The mechanically possible adjustment path VW extends from a first mechanical stop MA1 (left) to a second mechanical stop MA2 (right). For example, in the present exemplary embodiment, this is a seat-length adjustment, a headrest adjustment or other translatory adjustments. In an analogous manner, the method of control is also applicable to rotational adjustments, such as the adjustment of the inclination of the seat back.

The respective current position of the adjustable part of the adjusting device is determined by an evaluation device, which evaluates the adjustment movement by means of an incremental encoder and an associated sensor in this embodiment. The adjustment path VW is therefore divided into a plurality of increments. In the presentation of the 1 The adjustment range VW extends from the increment with the number 5 to the increment with the number 18. This representation is greatly simplified for illustration purposes. In order to be able to determine the adjustment position with sufficient accuracy, a much larger number of increments, for example tens of thousands of increments, are necessary. The invention is not limited to the use of incremental measuring systems, but also all other absolute and relative position determinations can be advantageously combined with the invention.

Around the mechanical load of the adjustment system is to be reduced each mechanical stop MA1 or MA2 a protective stop SS1 or SS2, also referred to as soft stop assigned. These protective stops SS1, SS2 are not in the direction of their respective mechanical Run over to stop MA1 or MA2, without the Verstellergie is reduced such that neither the associated mechanical stop MA1 or MA2 nor the transmission or the engine of the adjustment damaged becomes. For this purpose, the motor is preferably braked, so that the adjustment movement before or at the mechanical stop MA1 or MA2 to a standstill comes, or that the remaining on the respective stop MA1 or MA2 acting forces only small.

On the other hand, in the opposite direction, with increasing distance to the respective mechanical stop MA1 or MA2, the protective stops can be driven over SS1 or SS2. The distance of the protective stops SS1, SS2 to the associated mechanical stop MA1 or MA2 is either fixed, in 1 For example, an increment, or by a control device in dependence on a characteristic, for example, the single-seated weight of the vehicle occupant or the adjustment VW, configurable.

Each mechanical stop MA1 or MA2 is a learning range EB1 or EB2 assigned. This learning range EB1 or EB2 points Range limits depending on from the associated mechanical stop calculated or specified. In this embodiment The learning range EB1 of the stop MA1 extends from the increment 4 to the increment 8 and the learning range EB2 from the increment 15 up to the increment 20. The range limits and thus the width of the Teach-in range EB1, EB2 are either fixed and done in fixed position to the respective mechanical stop MA1 or MA2, for example, or the area boundaries dependent on of learned parameters or determined parameters or measured variables new configured.

The count values of the evaluation device for determining the position of the adjustable part of the adjusting device can lead to a shift of the determined current position to the real position of the displaced part of the adjusting device by measuring errors, memory errors or other program errors. This is exemplary in 1a shown. The previously determined protective stop SS2 is det after the shift therefore behind the mechanical stop MA2 (increment 16), ie outside the adjustment VW. In such a case, at least the protection stop SS2 is reset or updated (SS2 ').

The Teach-in areas EB1, EB2 are used to limit the authorization for setting of protective stops SS1 or SS2, each one a stop MA1, MA2 are assigned. For evaluation are several variants conceivable. A first variant provides that the new protective stop to be set SS2 'inside of the learning area EB2, while a second variant provides that a new protection stop SS2 'only is then allowed, if the newly determined position of the mechanical stop MA2 within the range limits of the teach-in range EB2 is located. In the following, this second variant will be described as an exemplary embodiment explained.

To the installation of the motor vehicle seat in a motor vehicle is the control unit for process control in the ground state. The position counter is on an initial value, for example, 12 predetermined. Likewise are all Protective stop positions and all limits of the learning ranges EB1, EB2 set to an initial value.

In a first step is the adjustment of the seat standardized by all adjustment levels once in both mechanical Attacks MA1, MA2 procedure. When reaching the respective mechanical Stop MA1 or MA2 is the associated protective stop position SS1, SS2 calculated and stored non-volatile in an EEPROM. With mutual The distance around the mechanical stops MA1, MA2 around the Teach-in ranges EB1 and EB2 calculated and stored non-volatile. For example, the range limits for this are with an incremental value or a percentage of the position of the mechanical stop MA1, MA2 spaced.

The measured path difference between the mechanical stops is used for calculating a minimum distance MD between the protective stops SS1 and SS2, in turn for Each adjustment level is stored separately non-volatile. to Calculating the minimum distance involves a given tolerance, so the minimum distance MD is preferably more than eighty percent the maximum displacement VW corresponds.

If the position determined by the position counter is only slightly shifted relative to the real position, this can lead to a mechanical stop MA2 being detected by a block movement within the learning range EB2. In this case, the protection stop SS2 is recalculated and as current protection stop SS2 ', as in 1a displayed, stored non-volatile. The old protection stop SS2 is deleted or overwritten simultaneously or following. In addition, the previous learning area EB2 as in the 1a is also shifted until the range limits are in the same ratio to the position of the mechanical stop MA2.

Becomes within the blocking area SB blocking the adjustment is determined, a setting of a protective stop, one of the mechanical attacks MA1, MA2 is assigned, not allowed. Such a blockage For example, through a champagne box or other obstacle HN causes his. However, this should not lead to a re-normalization lead the seat adjustment, since setting a protective stop SS2 does not correspond to the respective stop MA2 would be assigned. A wrong assignment would cause that the movable path of the adjustment path VW would be limited by this "false" protection stop "SS2 '".

Becomes a blockage due to an obstacle HN or a stop MA1, MA2 detected within the stopband SB, this is for the control device first unclear, or not detectable, if it is only a temporary one Obstacle, like a champagne box or is a mechanical stop MA1, MA2. In particular, can a significant shift of the position counter, for example by a runtime error, to an unexpected achievement of a mechanical Stop MA1, MA2 lead. To solve this conflict, both previous protective stops SS1 and SS2 are deleted or disabled. The previous learning ranges EB1, EB2 and the minimum distance MD are preserved. With a drive in one of the mechanical attacks MA1, MA2, the protective stops SS1, SS2 are recalculated when the blocking position within the learning range EB1, EB2 located. In this case, the associated training area EB1 or EB2 also recalculated with its range limits.

Emotional the adjustable part of the adjustment outside the adjustment VW, the engine is stopped at least temporarily. Will a position outside the learning ranges EB1, EB2 in overflows UL1, UL2 determines the protective stops SS1, SS2 and the learning ranges EB1, EB2 cleared or deactivated. The stored minimum distance MD, however, remains receive. Is in a renewed adjustment by a corresponding Control detected a block, the corresponding protective stop SS1 or SS2 and its associated Teach-in range EB1 or EB2 recalculated and stored.

The minimum distance MD of the respective adjustment level is constantly used to control the protective stops SS1 ", SS2" to be set after a detected blocking of the adjustment. The distance between the protective stops SS1 '' and SS2 '' must not be less than the minimum distance MD. Thus, if a protective stop position SS1 "is already set for an adjustment plane and the distance between this protective stop position SS1" and the opposite protective stop position SS2 "to be set after a subsequent block recognition is smaller than the minimum distance MD, as in FIG 1b shown schematically, both protection stops SS1 '' and SS2 '' and the learning areas EB1 and EB2 are disabled. For this case, it can be concluded that the adjustment VW is at least partially blocked.

The Restricted invention but not on the aforementioned embodiment. Rather, they are further embodiments of the invention conceivable that the admission of setting the protective stops SS1, SS2 within of the training areas EB1, EB2 under different boundary conditions than the aforementioned.

In 2 is a displacement VW a motor vehicle seat adjustment shown schematically. The mechanically possible adjustment path VW extends from a first mechanical stop MA1 (left) to a second mechanical stop MA2 (right). For example, in the present exemplary embodiment, this is a seat-length adjustment, a headrest adjustment or other translatory adjustments. In an analogous manner, the method of control is also applicable to rotational adjustments, such as the adjustment of the inclination of the seat back.

The respective current position of the adjustable part of the adjusting device is determined by an evaluation device, which evaluates the adjustment movement by means of an incremental encoder and an associated sensor in this embodiment. The adjustment path VW is therefore subdivided into a plurality of increments. In the presentation of the 2 The adjustment range VW extends from the increment with the number 5 to the increment with the number 18. This representation is greatly simplified for illustration purposes. In order to be able to determine the adjustment position with sufficient accuracy, a much larger number of increments, for example tens of thousands of increments, is necessary. The invention is not limited to the use of incremental measuring systems, but also all other absolute and relative position determinations can be advantageously combined with the invention.

Around the mechanical load of the adjustment system is to be reduced each mechanical stop MA1 or MA2 a protective stop SS1 or SS2, also referred to as soft stop assigned. These protective stops SS1, SS2 are not in the direction of their respective mechanical Run over stop MA1 or MA2, without the Verstellergie is reduced so that neither the associated one mechanical stop MA1 or MA2 nor the transmission or the Motor of the adjusting device is damaged. The protective stop SS1, SS2 leads accordingly in dependence from the determined adjustment position to an automatic reduction the adjustment to stop the adjustment of the adjustment in the area of mechanical blocking of the adjustment movement. For this the motor is preferably braked so that the adjustment before or on the mechanical stop MA1 or MA2 or a other obstacle comes to a halt, or that the remaining on the respective stop MA1 or MA2 or the obstacle HN2 acting forces are low or do not occur.

In the opposite direction, with increasing distance to the respective mechanical stop MA1 or MA2, the protective stops SS1, SS2, however, are traversable. The distance of the protective stops SS1, SS2 to the associated mechanical stop MA1 or MA2 is either fixed, in 2 For example, an increment, or by a control device in dependence on a characteristic, for example, the single-seated weight of the vehicle occupant or the adjustment VW, configurable.

The outgoing from motor stop MA1 in the direction of the stop MA2 moved motor vehicle seat on an obstacle HN2, which for example one between the Motor vehicle seat and the back seat If the banana box is turned on, the adjusting device will be on this Adjustment position (HN2) blocked. Because a distinction between the mechanical stop MA2 and the banana box HN2 not without further possible is the adjustment system must make a decision that the Mechanics protects against the loads of numerous blockages, without the possible Traverse VW permanently restricted. This is in the distance to the banana box at the adjustment position 14 an ineffective switchable Protective stop WSS2 set at the adjustment position 13. The distance allows one Reduction of the adjustment, so that the vehicle seat before Reaching the banana box HN2 stops, this should starting from an adjustment smaller than the increment 13 again in the direction of the banana box HN2 be adjusted.

Is the banana box HN2 removed from the space between the vehicle seat and back seat, and would like the user of the motor vehicle entrainment seat this adjust beyond the adjustment 13 in the direction of the mechanical stop MA2, this will of the user must be determined by the adjustment. If, for this purpose, the key for the adjustment in the same direction is actuated again at the adjustment position 13 after stopping the adjusting movement, the protective stop WSS2 is overprinted, so that its effect is switched off. The seat can then be moved to the mechanical stop MA2.

In the embodiment of 2 Each mechanical stop MA1 or MA2 is assigned a learning range EB1 or EB2. This learning range EB1 or EB2 has range limits which are calculated or predefined as a function of the associated mechanical stop MA1 or MA2. In this exemplary embodiment, the learning range EB1 of the stop MA1 extends from the increment 4 to the increment 8 and the learning range EB2 extends from the increment 15 to the increment 20. The range limits and thus the width of the learning range EB1, EB2 are either predetermined and take place in fixed positioning the respective mechanical stop MA1, or MA2, or the range limits are reconfigured, for example, depending on learned parameters or determined parameters or measured variables.

The count values of the evaluation device for determining the position of the adjustable part of the adjusting device can lead to a shift of the determined current position to the real position of the displaced part of the adjusting device by measuring errors, memory errors or other program errors. This is exemplary in 2a shown. The previously determined protective stop SS2 is therefore located after the shift behind the mechanical stop MA2 (increment 16), ie outside the adjustment path VW. In such a case, at least the protection stop SS2 is reset or updated. For this purpose, an ineffective switchable protective stop WSS2 'is initially set, which is replaced by a permanent protective stop SS2' which is independent of the overpressure, if the adjusting system recognizes the mechanical stop MA2 as such because of a fulfilled condition of a plausibility check.

The Teach-in areas EB1, EB2 are used to limit the authorization for setting of protective stops SS1 or SS2, each one a stop MA1, MA2 can be assigned. to Evaluation, several variants are conceivable. A first variant sees suggest that the new protective stop SS2 'be within the teach-in range EB2 must be while a second variant provides that a new protection stop SS2 'only allowed when the newly determined position of the mechanical stop MA2 is within the range limits of the learning range EB2. In the following, this second variant is presented as an exemplary embodiment.

To the installation of the motor vehicle seat in a motor vehicle is the control unit for process control in the ground state. The position counter is on an initial value, for example, 12 predetermined. Likewise are all Protective stop positions and all limits of the learning ranges EB1, EB2 set to an initial value.

In a first step is the adjustment of the seat standardized by all adjustment levels once in both mechanical Attacks MA1, MA2 procedure. When reaching the respective mechanical Stop MA1 or MA2 is the associated protective stop position SS1, SS2 calculated and stored non-volatile in an EEPROM. With mutual The distance around the mechanical stops MA1, MA2 around the Teach-in ranges EB1 and EB2 calculated and stored non-volatile. For example, the range limits for this are with an incremental value or a percentage of the position of the mechanical stop MA1, MA2 spaced.

The measured path difference between the mechanical stops MA1 and MA2 is used to calculate a minimum distance MD between the protective stops SS1 and SS2, in turn for Each adjustment level is stored separately non-volatile. to Calculating the minimum distance involves a given tolerance, so the minimum distance MD is preferably more than eighty percent the maximum displacement VW corresponds.

If the position determined by the position counter is only slightly shifted relative to the real position, this can lead to a mechanical stop MA2 being detected by a block movement within the learning range EB2. In this case, the guard stop SS2 is recalculated and as ineffective switchable guard stop WSS2 ', as in 2a displayed, set and stored non-volatile. The old protection stop SS2 is deactivated simultaneously or following. Now it is determined by means of the plausibility check whether the condition is met which ensures that it is the mechanical stop MA2. Subsequently, the ineffective switchable protective stop WSS2 'is replaced by the permanent, user-independent protection stop SS2'. Thereafter, the previous learning EB2, as in the 2a is shown shifted to the range limits in the same ratio to the position of the mechanical stop MA2, as before for the previous protective stop SS2.

Becomes within the blocking area SB blocking the adjustment is determined, a setting of a protective stop, one of the mechanical attacks MA1, MA2 is assigned, not allowed. Only allowed one of these blocking (HN2) assigned ineffective switchable Protective stop WSS2. Such a blockage (HN2) can be, for example through the aforementioned banana box or another obstacle HN2 caused his. However, this should not lead to a reorganization of the Lead seat adjustment, since setting a protective stop SS2 does not correspond to the respective stop MA2 would be assigned. An incorrect assignment would do so to lead, that the movable path of Verstellweges VW are limited by this "false" protection stop would.

Becomes a blockage due to an obstacle HN2 or a stop MA1, MA2 detected within the stopband SB is for the control device first unclear, or not detectable, if it is only a temporary one Obstacle HN2, such as a banana box HN2 or a mechanical Stop MA1, MA2 acts. In particular, a significant shift the position counter, for example, by a runtime error, to an unexpected achievement a mechanical stop MA1, MA2 lead. To this conflict too to solve, Both are protected by user actions independent protection stops SS1 and SS2 deleted or preferably deactivated. The previous learning areas EB1, EB2 and the minimum distance MD are retained. With a ride in one of the detected mechanical stops MA1, MA2 are the protective stops SS1, SS2 recalculated if the blocking position is within of the learning area EB1, EB2. In this case, the associated Teaching range EB1 and EB2 also with its range limits recalculated.

Emotional the adjustable part of the adjustment outside the adjustment VW, the engine is stopped at least temporarily. Will a position outside the learning ranges EB1, EB2 in overflows UL1, UL2 determines the protective stops SS1, SS2 and the learning ranges EB1, EB2 cleared or deactivated. The stored minimum distance MD, however, remains receive. Is in a renewed adjustment by a corresponding Control detected a blocking, the ineffective switchable Protective stop WSS2 'set and this one by the independent one Guard stop SS2 (or SS1) conditionally replaced and the associated one Learning range EB2 or EB1 in particular recalculated and saved.

The minimum distance MD of the respective adjustment level is constantly used to control the protective stops WSS1 ", WSS2" to be set after a detected blocking of the adjustment. The distance between the protective stops WSS1 '' and WSS2 '' must not be less than the minimum distance MD. Thus, if for an adjustment level already a protective stop position WSS1 '' is set and the distance between this protective stop position WSS1 '' and to be set after a subsequent block detection opposite protective stop position WSS2 '' is smaller than the minimum distance MD, as in 2 B schematically, both protection stops WSS1 "and WSS2" are not replaced by user action independent protection stops SS1 "and SS2", and the learning areas EB1 and EB2 are deactivated. For this case, it can be concluded that the adjustment VW is at least partially blocked in particular by an object or the like. The condition is therefore not fulfilled.

In the figures 3a and 3b is a process flow in the form of a flowchart shown schematically. The left in 3a part of the method shown refers to a first block at block 1, the second part of the method, which is in 3b in an analogous manner to a first-time blockage on the opposite second block 2. These blocks 1, 2 may be stops MA1, MA2 or other types of blockages, such as obstacles HN1, HN2. In the following, only the method sequence for block 1 will be described, since the second part of the method is mirror-image in terms of functionality. The learning areas mentioned above in the exemplary embodiment are the embodiment in this embodiment 3a and 3b not needed, but can be advantageously combined. In addition, the user stops independent protective stops SS1 and SS2 remain at a fixed adjustment position, wherein the determined position value I is normalized if necessary.

To a primitive normalization at the end of the tape production process of the motor vehicle the adjusting device in the process state 1 by the user method. At the same time, the adjustment stops at the level of user actions independent protective stops SS1 and SS2. Will be in the direction of the mechanical stop MA1 Block 1 detected, this being an obstacle HN1 or around the positional error virtual shifted mechanical Stop MA1 can become the user-independent protective stops SS1 and SS2 are disabled, but remain with their associated ones Position still saved.

Subsequently, an ineffective switchable protective stop WSS1 is set at a distance from the blocking block 1 in the adjustment path VW, and a counter for load or direction change is zero set. Thereafter, an adjustment in the process state 2 take place, in which the user actions independent protective stops SS1 and SS2 continue to be disabled, that are inactive and the ineffective switchable protection stop WSS1 allows protection against a procedure in the block 1. In addition, the load or direction changes are counted. This process state 2 is terminated when one of the following events occurs.

To the The first one is again a block 1 in the direction of the mechanical Stop MA1 detected, which therefore before the previous block. 1 must be detected in the adjustment VW, otherwise the adjustment is stopped at the ineffective switchable protective stop WSS1. This new block 1 leads again to a new setting of a new ineffective switchable Protective stop WSS1, the old ineffective switchable protective stop WSS1 will be deleted or overwritten.

To the second is when reaching the ineffective switchable protective stops WSS1 a guard stop counter value C1 by one counter elevated. exceeds this count the threshold value 3 is the ineffective switchable protective stop WSS1 deleted and the process goes to Process 4.

To the third becomes in case of overshooting Ü of the protective stop WSS1, which switches the protective stop WSS1 into an ineffective one State causes the ineffective switchable protective stop WSS1 thereby or deleted below and the process goes to Process 4.

In method state 4, the protection stops SS1 and SS2 which are independent of user actions are furthermore deactivated and the ineffective switchable protective stops WSS1, WSS2 are deleted. If a block 1 is detected in the direction of the stop MA1, an ineffective switchable protective stop WSS1 is set and subsequently proceeded in process state 2. If, on the other hand, a block 2 is detected in the direction of the stop MA2, an ineffective switchable protective stop WSS2 is set and subsequently in process state 3 (FIG. 3b ).

To the fourth is set in the process state 2 with set, ineffective switchable Protective stops WSS1 a blocking block 2 in the direction of the stop MA2 detected. This may again be an obstacle HN2 or act around the mechanical stop MA2. First, will Block 2 associated with this ineffective switchable Protection stops WSS2 set.

Subsequently, a condition Bed is checked. If the condition is fulfilled, the method is continued in method state 1. Otherwise, if the condition Bed is not met, the ineffective switchable protective stop WSS1 assigned to the mechanical stop MA1 is deleted and subsequently in process state 3 (FIG. 3b ) the process continues.

These Condition Bed consists in this embodiment of the plausibility check that the distance between the two inoperable protective stops WSS1 and WSS2 larger or equal to a minimum distance MD and at the same time only a few load changes between the two blocks Block 1 and Block 2 are done. The load changes are in an immediate causal relationship with certain position errors of the adjustment system, wherein the determined Position value I of the real position of the adjustment considerably may differ. Are these two subconditions of the required Accuracy of the adjustment position and the minimum distance is fulfilled below the position value I at the current adjustment position at the mechanical stop MA2 re-normalized by user actions independent Protection stops SS1 and SS2 are activated and the two ineffective Switchable protective stops WSS1 and WSS2 are deleted. Below is how already mentioned continue in process state 1.

The Restricted invention but not on the aforementioned embodiments. Rather, they are further embodiments of the invention conceivable, which is a replacement of an ineffective switchable protective stop by a user-independent protection stop under other boundary conditions link as the previously mentioned.

For controlling a control device of the adjusting device is provided which has a measuring unit and a computing unit. By means of the measuring unit, an electrical signal dependent on the adjusting movement is generated, which serves to determine an adjustment position within an adjusting path between a first stop and a second stop. The evaluation of this signal is carried out by the arithmetic unit, preferably a microcontroller. Furthermore, this microcontroller has control functions which make it possible to set an ineffective switchable by a user action protective stops in the adjustment when a mechanical blockage by a detector, which may consist of the measuring unit and the microcontroller is detected. Furthermore, the microcontroller has computing means to replace the ineffective switchable protective stop by an independent of this user action protective stop, if the condition dependent on the adjustment movement is met. The dependence of this condition can also be controlled by this Steue be determined from computing unit and measuring unit.

Claims (49)

Control device of an adjusting device a motor vehicle, in particular a motor vehicle seat adjustment, wherein the adjusting device at least one adjustment path between having a first stop and a second stop, with one Measuring unit for determining the respective adjustment position within of the adjustment path and an arithmetic unit that set up is - by a user action an adjustment of the adjustment within the adjustment path, - A protective stop in the adjustment to put in dependence from the adjustment position, a reduction of the adjustment, in particular for stopping the adjustment movement in the area of a mechanical blockage the adjusting movement, triggers, - in addition to Setting the protective stop assigned to this protective stop To determine the learning area - Range limits of the teach-in area dependent on from a positional characteristic, in particular from the position at least one of the attacks, to determine, and - in the Case of a correction requirement the position of this protective stop setting a new protective stop to allow, in particular, the new protective stop or the associated mechanical stop assigned position value within this Learning area lies. Control device according to Claim 1, characterized that the arithmetic unit is set up in addition to setting the new protection stop to move this learning area. Control device according to one of the preceding Claims, characterized in that the arithmetic unit an evaluation logic for the evaluation of the individual adjustment events of the adjustment movement and wherein the protective stop by the Auswertelogik ineffective is switchable. Control device according to one of the preceding Claims, characterized in that the arithmetic unit for ineffective switching of the protective stop on the basis of the evaluation of the history of the adjustment events is set up. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up to evaluate such events as adjusting events of the adjustment movement, which cause a stop of the adjustment. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up to evaluate such events as adjusting events of the adjustment movement, which correspond to a beginning of an adjustment movement, and / or such Adjustment events that indicate a change of direction of the adjustment movement correspond. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up as dependent on the adjustment movement Conditions the place, the time and / or the number of individual Verstellereignisse to use the adjustment. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up - for determination the Einlernbereiches a blocking of the adjustment to a the attacks too determine, and - the Range limits of the teach-in range as a function of that for blocking associated with the adjustment To calculate adjustment position. Control device according to Claim 8, characterized that the arithmetic unit is set up the range limits such to calculate that the blocking position is on or within the Range limits is. Control device according to one of claims 8 or 9, characterized in that the first mechanical stop a first learning area and the second mechanical stop a second teaching area is assigned, and between the first Training area and the second training area a blocking area provided is, wherein the arithmetic unit is set up in the restricted area Setting a new, one of the mechanical stops associated To prevent protective stops. Control device according to claim 10, characterized characterized in that the arithmetic unit for deactivation at least one of the set protective stops depending on one within the blocking area certain blocking of the adjustment set up is. Control device according to one of claims 10 or 11, characterized in that the arithmetic unit for deactivation of learning areas and set protective stops depending on a determination of an adjustment position outside the previous learning areas and the blocking area is set up. Control device according to one of herigende claims, characterized in that the arithmetic unit is adapted to compare the distance between a first stop of the first mechanical stop and a second stop of the second mechanical stop with a minimum distance, and at least to change the one of the protective stops, if the distance is equal to the minimum distance or less than the minimum distance. Control device according to claim 13, characterized characterized in that the arithmetic unit for deactivating the two Protective stops and the associated Teaching areas is set up when the distance equals the Minimum distance or less than the minimum distance. Control device according to one of claims 13 or 14, characterized in that the minimum distance for an adjustment is given, and for the comparison from a non-volatile Memory is readable. Control device according to one of claims 13 to 15, characterized in that the arithmetic unit is established is the minimum distance from a measured maximum adjustment path to calculate. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up the adjustment speed at least within the learning ranges to reduce. Control device according to one of the preceding Claims, characterized in that the arithmetic unit for calculating the Protective stops and learning areas and storage in one nonvolatile Memory is formed. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up dependent on from the determination of a first position of the first mechanical Stop associated first protective stops a second position of the second protective stops associated with the second mechanical stop to determine. Control device according to claim 19, characterized characterized in that the arithmetic unit is set up in the case a need for correction of Position of the protective stops - the error of the position of this To identify protective stops - the desired Determine the position of this protective stop and correct it and - in dependence from this current position the position of the other, the other Determine and correct the stop assigned to the protective stops. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up - the adjustment position to assign a position value, - this for assignment depending to change from the adjustment of the adjustment, - the position value to correct if a shift of the position value to the current Adjustment position can be determined, and - to correct the current Position value relatively changed position to position at least a protective stop to this current adjustment position. Control device according to one of claims 19 to 21, characterized in that the arithmetic unit is established is - the To map the displacement on a virtual position axis, - on this virtual position axis the position of the first protective stop and determines the position of the second protective stop, which depends on the first protective stop to arrange, - the current adjustment position a position value on the virtual Assign position axis, and - this virtual position axis to the adjustment in dependence from a determination of a displacement of the virtual position axis to align with the adjustment. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up for at least temporary Deactivation of at least one of the protective stops, depending on from attaining a predetermined number of adjustments the adjustment. Control device according to one of the preceding Claims, characterized in that the first mechanical stop a first learning area and the second mechanical stop second learning area is assigned, between the first learning area and the second teaching area is provided with a blocking area, and the arithmetic unit is set up at least one of the protective stops dependent on from a determination of blocking the adjustment movement within disable area. Control device according to one of the preceding claims, characterized in that, in the case of detection of a mechanical blockage, the arithmetic unit is set to set an inoperable switchable by a user action protective stop, and the ineffective schaltba Replace the protective stop with a protective stop independent of this user action if a condition that depends on the adjustment movement is fulfilled. Control device according to claim 25, characterized characterized in that the condition of an adjustment movement in one of the stops dependent is. Control device according to claim 26, characterized characterized in that the arithmetic unit is set up as a condition the position of the blocking in the adjustment opposite Determine stop. Control device according to claim 27, characterized characterized in that the arithmetic unit is set up the opposite one Stop by a minimum distance of the two blocks to determine. Control device according to one of claims 25 to 28, characterized in that the arithmetic unit is established is a condition to sense the blockage at one of the stops. Control device according to one of claims 25 to 29, characterized in that the arithmetic unit is established the inaccuracy of the determined adjustment position must be determined where as dependent on the adjustment movement condition, the inaccuracy meets a criterion especially does not exceed a maximum value. Control device according to claim 30, characterized characterized in that the arithmetic unit is set up the inaccuracy to be determined by a number of adjustments, being considered as dependent on the adjustment Condition the number of adjustments does not exceed a maximum value. Control device according to one of claims 30 or 31, characterized in that the arithmetic unit is set up is the inaccuracy due to a number of directional changes Determine adjustment, where as dependent on the adjustment movement condition the number of changes in direction of the adjustment does not exceed a maximum value. Control device according to one of claims 30 to 32, characterized in that the arithmetic unit is established is the inaccuracy of determining a detected intrusion of the Determine supply voltage of the adjustment. Control device according to one of claims 25 to 33, characterized in that the arithmetic unit is established is one of one dependent on the adjustment movement condition Blocking independent Adjustment to be sensed in the adjustment between the attacks. Control device according to one of claims 25 to 34, characterized in that the arithmetic unit is established is by means of a pinch detector pinching objects and / or Detecting people by the adjustment of the motor vehicle, wherein the condition dependent on the adjustment movement is non-pinching is. Control device according to one of claims 25 to 35, characterized in that the adjusting device in a Normalization mode is operable, whereby the adjustment movement dependent Condition in this normalization mode is the blockage at the stops. Control device according to one of claims 25 to 36, characterized in that the user action is a manual activity an operating device for controlling the adjusting device. Control device according to claim 37, characterized characterized in that the user action is the re-manual operation of the the Verstellbewegungsrichtung associated actuating element of the operating device after setting the ineffective switchable protective stop. Control device according to claim 38, characterized characterized in that the user action is the manual operation of a (Additional) Release actuating element is. Control device according to one of claims 25 to 39, characterized in that the user action an interaction by means of an input unit and an output unit between the Adjustment and the user. Control device according to one of claims 25 to 40, characterized in that the arithmetic unit is established is to replace the ineffective switchable protective stop by the one independent of the user action Protective stop this protective stop of ineffective switchable to independent of the user action Protective stop change. Control device according to one of claims 25 to 41, characterized in that the arithmetic unit is set up to replace the ineffective switchable protective stop by the user action independent protective stop to delete the ineffective switchable protective stop and the Activate protection stop independent of the user action. Control device according to one of claims 25 to 42, characterized in that the arithmetic unit is established is with the setting of the (first) protective stop due to the detection to put a second stop to the mechanical blocking, the blocking of the blocking in the adjustment opposite stop is assigned, and upon reaching this second protective stop both Replace protection stops with user-independent protection stops. Control device according to claim 43, characterized characterized in that the arithmetic unit is set when not reaching this second protective stop in case of a new blocking again a second protective stop of the current blocking in the adjustment path opposite to put. Control device according to one of claims 43 or 44, characterized in that the set protective stop by a user action is ineffective switchable protection stop, wherein the dependent of the adjustment movement Condition is the achievement of the second protection stop. Control device according to one of claims 43 to 45, characterized in that the arithmetic unit is established is the second protective stop a predetermined or determinable minimum distance in the adjustment of the blocking or the set first protective stop removed, with the minimum distance of a desired Travel path dependent is. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up for the Blocking to evaluate the course of an adjustment variable, and as a condition this course one for to assign a stop characteristic course of the adjustment. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up to assign the adjustment position to a position value, that to the assignment dependent on is variable by the adjustment of the adjustment, the position value to correct if the position value to the current adjustment position is moved, and to correct the current position value to set this current adjustment position. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is one or more Memory positions leading to an automatic procedure of the adjustment serve in these memory positions, in relation to the protective stops to set and in case of blocking with the resetting of the To update protection stops.