Adjustment system for a vehicle and control method with partial area monitoring during adjustment of an adjustment part and computer program product

Abstract

The proposed solution relates in particular to an adjustment system for a vehicle, an electronic control device (4) is arranged, - in response to a first deviation of a detected value for an adjustment variable (M) from a reference value at at least one adjustment position (s1, s2, s3, s4) of an externally power-operated adjustment part (2), an expected range (s1±s t , s2±s t , s3±s t , s4±s t ) which depends on the adjustment position (s1, s2, s3, s4) at which the deviation was first detected, - for subsequent adjustments of the adjustment part (2) to check whether at least one of the expected range (s1±s t , s2±s t , s3±s t , s4±s t ) lying adjustment position of the adjustment part (2) a deviation of a detected value for the adjustment variable (M) from a reference value occurs again, and - to record at least one metric indicative of the frequency with which deviations from a reference value occur during adjustments of the adjustment part (2) in a range (s1±s t , s2±s t , s3±s t , s4±s t ) encompassing sub-area ([s1st; s2+s t ], [s3-s t ; s4+s t ]) of the adjustment range (s min -s max ) have occurred.

Description

The proposed solution relates in particular to an adjustment system for a vehicle, to a method for controlling such an adjustment system and to a computer program product.It is widely known in the vehicle sector to provide adjusting parts which can be adjusted by external force actuation and in this case to monitor an adjustment electronically in order, for example, to exclude injuries to persons by the adjusting part. For example, in the case of motor-adjustable window panes, it is customary to detect whether a trapping event, in which a body part threatens to be trapped between the closing window pane and a body section, and then to stop and / or reverse an adjustment of the adjusting part. It is also known to electronically detect any faults in the adjustment system in order to detect a possible need for maintenance or repair for the adjustment system or at least make it easier to detect.For example, DE 197 48 934 A1 discloses reading out any faults detected during an adjustment of an adjustment part within the scope of a diagnosis of the adjustment system in order to facilitate maintenance or repair of the adjustment system. However, DE 197 48 934 A1 leaves open how any faults in the adjustment system are detected and made available for the subsequent diagnosis.DE 10 2009 054 107 A1 in turn discloses detecting any faults on the basis of a nominal model in an automated manner during an adjustment of an adjustment part. Here, a so-called diagnostic entry is stored in a memory if it is detected that a deviation from the nominal model characteristic for a fault-free adjustment has occurred. According to the teaching of DE 10 2009 054 107 A1, however, it remains in particular open how potential faults can be characterized and, for example, it can be ruled out that faults which have occurred only once lead to a multiplicity of diagnostic entries.DE 100 34 014 A1 describes a method for implementing anti-pinch protection in an electric drive unit for window lifter drives, in which the excess force as the difference between the drive force and the frictional force is compared with a triggering threshold value. For this purpose, the profile of the frictional force of the current actuating process, which profile is dependent on the actuating travel of the electric drive unit, is compared with the profile of the frictional force of at least one actuating process which is located behind it, and the triggering threshold value is changed as a function of the agreement between the profiles of the frictional force.There is thus a continuing need for adjustment systems and methods with which the monitoring of a power-actuated adjustment of an adjustment part on or in a vehicle can be improved.The proposed solution provides a remedy here.For example, an adjustment system for a vehicle is proposed that, in addition to an adjustment part that can be adjusted by external force actuation and a drive device for the external force-actuated adjustment of the adjustment part, an electronic control device for monitoring the adjustment of the adjustment part in an adjustment range is provided. The electronic control device is configured for monitoring the adjustment on the basis of at least one adjustment variable characterizing the adjustment and on the basis of reference values stored in the adjustment range for adjustment positions of the adjustment part for the at least one adjustment variable. Furthermore, electronic control device of a proposed adjustment system is configured,in response to a first deviation of a detected value for the adjustment variable from a reference value at at least one adjustment position of the adjustment part, to define an (adjustment position) expected range which is dependent on the adjustment position at which the deviation was determined for the first time,checking for subsequent presentations of the adjusting part whether a deviation of a detected value for the adjusting variable from a reference value again occurs at at least one adjusting position of the adjusting part lying in the expected range, andat least one measured value indicative of the frequency with which deviations from a reference value have occurred during adjustment of the adjusting part in a sub-region of the adjusting region comprising the expected range.In a proposed adjustment system, an electronic control device for monitoring the adjustment of the adjustment part is consequently configured to define an expected range for an adjustment position or a plurality of adjustment positions if, for the first time, a (intolerant) deviation from a reference value predefined for fault-free operation of the adjustment system is detected during the adjustment of the adjustment part and then repeatedly check for this expected range whether further deviations occur. If deviations from reference values occur repeatedly in the expected range, a disturbance in a specific sub-range for the adjustable adjustment part is assumed. With the proposed solution it is thus possible not only to identify possible disturbances which are possible at least in a region-resolved manner in an automated manner, but also not to take account of false disturbances which, for example, are due to only a one-time deviation from a reference value or which, during further operation of the adjustment system, have possibly disappeared again, for example in which a possible mechanical disturbance is eliminated again, a poor route is no longer traveled on or an erroneous or improper user intervention is ended. With an embodiment variant of a proposed adjustment system, it is thus possible in particular to improve the diagnosis of faults in the adjustment system and to more easily limit any need for maintenance and / or repair to specific components of the adjustment system and / or subareas and thus sections of an adjustment path of the adjustment part.In principle, a first-time deviation of a detected value for the adjustment variable can be determined by at least one threshold value stored for the adjustment variable being reached and thus, for example, being exceeded or undershot, depending on which adjustment variable is considered and which is defined as indicative of the occurrence of a potential fault in the adjustment system. For example, in the case of an adjustment part in the form of a window pane or a component of a vehicle seat, a torque can be evaluated as a decisive adjustment variable. Here, the exceeding of a threshold value for the torque is typically indicative for an adjustment of the respective adjustment part requiring too great a force exertion by a drive motor of the drive device and thus potentially a fault in the adjustment system. If, in contrast, a rotational speed is detected as a decisive adjustment variable, the dropping below a threshold value for the rotational speed would speak to a possible fault in the same situation.The detection of an adjustment variable can be understood here in principle to mean that a value for the respective adjustment variable is measured directly during an adjustment of the adjustment part. In the present case, however, a detection is also understood to mean that a value for the respective adjustment variable is determined from measured values and is therefore calculated, for example. For example, a detected adjustment variable can be a torque for which values are calculated using measured values for a rotational speed and a motor voltage of a drive motor of the drive device.In principle, the expected range defined in the event of a first-time deviation can comprise exactly one value for an adjustment position. This value can in turn be identical to the adjustment position at which the deviation has occurred for the first time. Alternatively, the expected range can comprise a plurality of adjustment positions which are determined using that adjustment position at which the deviation has occurred for the first time. If, for example, a deviation from a reference value is determined for the first time at an adjustment position s 1 during an adjustment of the adjustment part, the expected range can be defined as an adjustment position interval around this adjustment position s 1 wherein the interval limits are defined by a specific number of adjustment positions before the adjustment position s 1 and a specific number of adjustment positions after the adjustment position s 1. For example, an adjustment position interval [s 1- s t1; s 1+ s t2] is then defined for the expected range, wherein the parameters st 1 and st 2 are predefined addition values in the electronic control device and can also be identical if necessary.The at least one metric, which is indicative of the frequency with which deviations have occurred in a sub-region of the adjustment range, can furthermore directly represent a corresponding frequency. Thus, for example, it can be immediately possible to read, on the basis of a value for the measured number, how often a deviation from reference values has occurred in the sub-region. Alternatively, such a frequency can only still be deduced from the detected values for the measurement number. Thus, for example, a counter or "counter" does not necessarily have to be implemented in order to count deviations that have occurred.In one embodiment variant, the electronic control device is configured to increase a value for the metric if a new deviation has occurred in the subregion during a subsequent adjustment, or to reduce a value for the metric if no deviation has occurred in the subregion during the subsequent adjustment. As long as the sub-region comprising the expected region is to be monitored-after a first determination of the expected region in response to the first determination of a deviation from a reference value-in this embodiment variant a value for the measurement number is consequently increased or reduced during each subsequent adjustment if the adjustment of the adjustment part is carried out up to at least one adjustment position lying in the sub-region or is carried out beyond at least one such adjustment position. After the first occurrence of a potential fault in the adjustment system and the definition of an expected range resulting therefrom, it is consequently detected in this embodiment variant for each subsequent adjustment of the adjustment part, in which the adjustment part is adjusted in the partial range defined with the expected range, whether or not a potential fault has occurred again. On the basis of the value of the measured number recorded for sub-region, it is thus possible during further operation of the adjustment system to evaluate whether it is actually a recurring disturbance or merely a one-time or at least non-permanently occurring event.Based on this, the electronic control device can be configured, for example, to set the check as to whether a deviation of a detected value for the adjustment variable from a reference value occurs again at at least one adjustment position of the adjustment part lying in the monitored sub-region, if the value for the measurement number reaches or maintains a lower limit value during the subsequent adjustment, in which no deviation has occurred in the sub-region. Thus, if, for example, the frequency falls to "0" or remains (again) at "1", it can be assumed that there is no permanent disturbance at the corresponding section of the adjustment path and thus in the sub-region of the adjustment range for the adjustment part. If the monitoring of the subregion is predefined on the basis of the defined expected region via associated values in a detection memory of the adjustment system, these values are deleted in the detection memory when the value for the measured value reaches or maintains the lower limit value. This can ensure that no information regarding events that may only occur once or disturbances that are shut down again is permanently stored about the operation of the adjustment system. For example, after a first deviation, the value for the measured number can be set to "1" and cannot be lowered further. If, after a predetermined number of adjustments over the monitored subregion, no further deviation from a reference value occurs and the value for the measurement number thus remains at "1" for a longer time, the monitoring for this subregion is abandoned again.Alternatively or additionally, the electronic control device can be configured to determine a fault event for the adjustment system if the value for the measured value reaches an upper limit value during a subsequent adjustment, in which a deviation has occurred again in the subregion. In this embodiment variant, a disturbance event and thus a permanently existing disturbance within the adjustment system is consequently only assumed when a disturbance has repeatedly occurred in the defined sub-region and has exceeded a frequency threshold predefined above the upper limit value.In response to the determination of a fault event, a fault event entry can be generated in a fault event memory of the adjustment system by the electronic control device, for example, and / or a fault event signal can be generated for transmission to a higher-level vehicle electronics, to at least one mobile device and / or to a remote monitoring device. A fault event memory is, for example, part of the electronic control device or is separated therefrom. In principle, a fault event memory can be readable, for example by a mechanic in a workshop or by the vehicle manufacturer, in order to diagnose a fault which has occurred within the adjustment system and / or to define a need for maintenance and / or repair. Such considerations can also be based on a wireless or wired transmission of a fault event signal to a higher-level vehicle electronics, to at least one mobile device and / or to a remote monitoring device. Thus, for example, a vehicle user or a manufacturer of the vehicle in which the adjustment system is used can be informed via the corresponding interference event signal that a recurring and thus presumably permanent interference is present within the adjustment system.In one embodiment variant, the electronic control device is configured to generate an entry in a detection memory of the adjustment system in response to the first-time deviation of a detected value for the adjustment variable from a reference value, with which entry the check for subsequent adjustments of the adjustment part is established whether a deviation of a detected value for the adjustment variable from a reference value again occurs at at least one adjustment position of the adjustment part lying in the expected range. In the detection memory, which can also be part of the electronic control device, for example, after a first occurrence of a potential fault, there is thus an entry with which it is predefined for the electronic control device that a potential fault has occurred at least once in a specific sub-region and it is now necessary to detect for this purpose whether a fault occurs again in this sub-region. Via the operation of the adjustment system, such a detection memory can then consequently also have a plurality of entries for different partial regions respectively monitoring.In principle, such a detection memory can be different from an aforementioned interference event memory. While partial areas for potential faults which are monitored currently and thus possibly only temporarily are stored in the adjustment system via entries in the detection memory, actually only entries are generated in the fault event memory if faults have occurred repeatedly and thus with a specific frequency. Thus, actually only entries for diagnostic relevant disturbances are present in the disturbance event memory, for which a disturbance event entry was generated on the basis of data from the detection memory.In order to simplify the diagnosis for an occurring interference event, the electronic control device may be configured to store a value for the absolutely greatest deviation from a reference value for the adjustment variable which has occurred in the monitored subregion. Thus, for the sub-region (and thus, for example, also for a sub-region of a plurality of monitored sub-regions), exactly one extreme value is stored which represents the greatest detected deviation over a plurality of displacements of the displacement part. A largest detected deviation can result here in an upward or downward direction with respect to the reference value, depending on whether an exceeding of an upper threshold value or the falling below of a lower threshold value is relevant for the occurrence of a potential fault. Therefore, a value for this is not logged for each deviation in the sub-area, but only the respectively last stored value is overwritten if a larger absolute value is detected for a deviation in the sub-area.As already explained above, the expectation range can basically include the adjustment position at which the deviation has occurred or correspond to this adjustment position (and in the latter case therefore comprise exactly one value). In the first-mentioned variant, the expected range for subsequent displacements of the displacement part can be defined on the basis of the displacement position at which the deviation has occurred for the first time and at least one addition value, for example an addition value permanently stored in the electronic control device.In principle, the electronic control device can also be configured to define a plurality of expected ranges for a sub-range, so that at least two expected ranges are relevant for a sub-range, for example. Alternatively or additionally, a plurality of subareas can be defined for which at least one metric is detected in each case. If, for example, a deviation from a reference value for the adjustment variable is determined on the basis of the exceeding of a threshold value, for example a threshold value which is determined from the respective reference value for an adjustment position and a predefined tolerance, the electronic control device of one embodiment variant can be configured,defining a first expected range for a partial range on the basis of a first adjustment position at which the threshold value was exceeded for the first time during an adjustment movement of the adjustment part, anddefining a second expected range for the same sub-range on the basis of a second adjustment position, at which the threshold value has been undershot again when the adjustment movement is continued.Consequently, it is established for the interval boundaries of the sub-region via the first expectation range and the second expectation range, in the region of which adjustment positions an exceeding of the threshold value is to be expected, and in which region of adjustment positions it is to be expected again that values recorded for the adjustment variable are "normal" again and thus essentially follow a reference value profile. Consequently, entry and exit ranges are defined via the first and second expectation ranges for a sub-range for which it is to be checked whether a fault event determined for the first time is repeated and is therefore suitable, for example, as a trigger for the storage and / or the transmission of data with which a fault in the adjustment system is pointed out.In one embodiment variant, the adjusting part of the adjusting system is a window pane for the vehicle. However, the adjusting part can also be another component which can be adjusted on or in the vehicle in a power-actuated manner. An example of this is a sliding roof or a tailgate or a component of an interior object, for example a central console or a vehicle seat.In one embodiment variant, the electronic control device is configured to switch to an emergency operation by more than one switch-off point during an adjustment of the adjusting part in response to exactly one deviation or at least twice repeating deviation of a detected value for the adjustment variable from a reference value. If, for example, a value for the adjustment variable thus deviates from a reference value and thus in particular from a reference value profile by more than one switch-off point while the adjustment part is being adjusted, or if such a deviation occurs a second time and optionally also at the same adjustment position or at least in a specific range around the one adjustment position, a switch is made to an emergency operation. In this emergency operation, an adjustment of the adjustment part controlled by the electronic control device is only still possible on the basis of emergency operating parameters, with which an automatic adjustment of the adjustment part possible during normal operation of the adjustment system is blocked without an actuation of at least one operating element of the adjustment system being maintained by a user. When a shutdown threshold is exceeded, a fail-safe function is thus provided if it has to be assumed, on the basis of the shutdown threshold being reached, that the adjustment system could lead to critical errors during automatic adjustment. Thus, for example, in the case of a window pane on a vehicle that can be adjusted by external force, it can be provided that the window pane is automatically adjusted into a completely closed position after an actuation of an operating element. In this case, however, a case of trapping must then be reliably detectable in order to prevent, for example, a body part of a person from being trapped between the closing window pane and a body part. However, if it has now been shown during an adjustment of the adjustment part that the switch-off threshold for an adjustment variable possibly also relevant for the case of trapping has been exceeded and it is thus to be assumed that a case of trapping could no longer be reliably detected, in the case of the proposed variant embodiment of a proposed adjustment system the possibility for an automatic adjustment (and thus for example for a so-called automatic run) is blocked.In a development, it can also only be made possible in the emergency operation that the adjusting part is adjusted into one of two possible end positions, for example, that in the case of a window pane the window pane can only be closed once by a user.The variant explained above with the specific switching into an emergency operation can also be independent of the proposed definition of an expectation range and the detection of a measured value. Accordingly, a further aspect of the proposed solution provides an adjustment system in which an electronic control device is configured to switch into an emergency operation during an adjustment of the adjustment part by more than one switch-off threshold in response to exactly one deviation or at least twice repeating deviation of a detected value for an adjustment variable by more than one switch-off threshold, in which an adjustment of an adjustment part controlled by the electronic control device only still takes place on the basis of emergency operating parameters, with which an automatic adjustment of the adjustment part (i.e. without permanent actuation of an operating element by a user) is blocked and thus excluded.In the case of a window pane as the adjusting part to be adjusted, a so-called automatic running, for example, is thus blocked. If necessary, in the emergency operation, only an adjustment into one of two end positions of the adjustment part can also be permitted. Thus, for example, a window pane can be moved in an externally actuated manner merely into the completely closed position during emergency operation of the adjustment system via a drive device of the adjustment system.The proposed solution further relates to a method for controlling a power-actuated adjustment of an adjusting part on or in a vehicle. The adjustment of the adjustment part in an adjustment range is monitored here on the basis of at least one adjustment variable characterizing the adjustment and on the basis of reference values for the at least one adjustment variable stored in the adjustment range for adjustment positions of the adjustment part. It is also provided thatin response to a first-time deviation of a detected value for the adjustment variable from a reference value at an adjustment position of the adjustment part, an expected range is defined which is dependent on the adjustment position at which the deviation was determined for the first time,checking for subsequent displacements of the displacement part whether a deviation of a detected value for the displacement variable from a reference value occurs again at at least one displacement position of the displacement part lying in the expected range, andat least one measured value is detected which is indicative of the frequency with which deviations from a reference value have occurred during displacements of the displacement part in a sub-region of the displacement region comprising the expected range.An embodiment variant of a proposed method can be implemented, for example, by an embodiment variant of a proposed adjustment system. Features and advantages explained above and below for embodiment variants of a proposed adjustment system thus also apply to embodiment variants of a proposed method and vice versa.Furthermore, a computer program product is proposed which comprises commands which, when executed by at least one processor of an electronic control device of an adjustment system for the power-actuated adjustment of an adjustment part on or in a vehicle, cause the electronic control device to execute an embodiment variant of a proposed method. An embodiment variant of a proposed computer program product can thus be loadable, for example, as a control program onto a control device of the adjustment system.The appended figures illustrate by way of example possible variants of the proposed solution.The following are shown here: FIG. 1 shows a first embodiment variant of a proposed adjusting system with a window pane to be adjusted as an adjusting part; FIG. 2 shows torque profiles over an adjustment travel of the window pane to be adjusted of FIG. 1, with a reference value profile for the torque and a profile with faults; FIG. 3 shows a torque profile with a total of four expected ranges, each defining in pairs a monitored sub-range in which a torque has deviated from the reference profile beyond a threshold value; FIG. 4 shows torque profiles for an adjustment of the window pane of FIG. 1, in which the torque has reached a switch-off threshold, whereby an automatic running for the window pane is blocked; FIG. 5 shows a flow chart for an embodiment variant of a proposed control method.FIG. 1 schematically shows an embodiment variant of a proposed adjustment system for power-operated adjustment of an adjustment part in the form of a window pane 2. the window pane 2 is provided on a vehicle door 1 in the present case and closes a window opening 10 in the vehicle door 1 in one of two possible end positions. Via a drive device 3, for example comprising an electric motor, the window pane 2 can be adjusted between its two possible end positions along two mutually opposite adjustment directions V 1 and V 2. Starting from a completely lowered end position of the window pane 2, the drive device 3 can lift the window pane 2 along an adjustment path s ges up to the upper end position, so that the window pane 2 completely closes the window opening 10.The drive device 3 is controlled by an electronic control device in the form of a control unit 4. The control device 4 not only controls the drive device 3 in this case, but is also set up and provided for monitoring the adjustment of the window pane 2. Thus, for example, a reference profile f ref shown in FIG. 2 for the torque applied by the drive device 3 is stored in the control unit 4 during a disturbance-free adjustment of the window pane 2 from the maximum lowered end position to the fully closed end position. The reference profile f ref can be learned and standardized for the specific vehicle door 1. The reference profile f ref for the torque M can thus have been learned within the scope of one or more calibration adjustments of the window pane 2.On the basis of detected values for the torque M, it is possible during operation of the adjustment system to check whether an excessive deviation from the reference profile f ref occurs and thus, under certain circumstances, a malfunction of the adjustment system has to be assumed. An evaluation of the actual profile of the torque is also suitable for a possible detection of a case of trapping in which an object threatens to be trapped between the closing window pane 2 and the window frame of the vehicle door 1.Values recorded for the actual profile of the torque M according to a measured value profile f 1 illustrated by way of example in FIG. 2 do not necessarily have to originate from a measurement of the torque M. Rather, the corresponding values for the torque M can also be determined from values for the rotational speed of a drive motor of the drive device 3 and a motor voltage.In the measured value curve f 1 shown in FIG. 2, detected values for the torque M in an adjustment range [s min; s max] are almost continuously above a threshold value M max stored for the torque M and thus deviate beyond a tolerable degree from the stored reference curve f ref. There is thus obviously a malfunction of the adjustment system. The adjustment range [s min; s max] in this case reflects the section of the entire adjustment path s ges in which the window pane 2 performs a visible adjustment movement in order to open or close the window opening 10. A first time approach from the first, lower end position, in which the window pane 2 is lowered to the maximum, and thus at the beginning of an adjusting movement over the complete adjustment path s ges is therefore outside this adjustment range [s min; s max], as is the final insertion of the window pane 2 into a window seal at the end of the adjustment path s ges, which is associated with a significant increase in the torque M.In practice, a measured value profile f 1 according to FIG. 2, in which a deviation from the reference profile f ref occurs throughout, is rather unusual. Typically, disturbances only occur in certain partial regions of the adjustment range [s min; s max]. However, under certain circumstances, these may not be easily diagnosticizable and / or localizable in a workshop.In this respect, improvements can be achieved with a variant embodiment of the proposed solution.Thus, the control unit 4 of the adjustment system of FIG. 1 is coupled to a detection memory 5. If necessary, the detection memory 5 can also be integrated in the control device 4. Entries for monitoring subareas within the adjustment range [s min; s max] are defined in the detection memory 5 if a deviation from the reference profile f ref exceeding a tolerated measure is determined for the first time during an adjustment of the window pane 2 at an adjustment position. After such a first (sufficiently high) deviation, with which the threshold value M max is exceeded, a sub-region is monitored in a targeted manner with the aid of the control unit 4 to determine whether corresponding deviations repeatedly occur in this sub-region. These deviations are detected in the detection memory 5. If deviations from the reference profile f ref occur repeatedly in a sub-region, so that a frequency threshold value is exceeded, this initiates an entry in a control-device-side interference event memory 40 and / or the generation of an interference event signal e. The interference event signal e can be transmitted to a receiver 6, for example, via a control-device-side interface 41. The receiver 6 is, for example, a higher-order vehicle electronics, at least one mobile device and / or a remote monitoring device, which is assigned to the vehicle manufacturer, for example. The interference event signal e then signals that interference events have repeatedly occurred in a specific sub-region during the adjustment of the window pane 2. By means of the fault event signal e, any need for maintenance and / or repair for the adjustment system can thus be signaled in a targeted manner. In the fault event memory 40, information relating to faults which have occurred and detected with a certain frequency is again available in a readable manner, so that these can be used within the scope of a diagnosis, for example in a workshop. A procedure in this regard is illustrated in more detail with reference to the diagram of FIG. 3.If, for example, during an adjustment of the window pane 2 at an adjustment position s 1 within the adjustment range [s min; s max] a deviation from the reference profile f ref exceeding the threshold value M max occurs, an expected range is generated in the detection memory 5 using this adjustment position s 1. In this case, the expected range can be, for example, an interval around the adjustment position s 1 wherein the interval limits are predefined by an addition value s t. A first expectation range would thus be, for example, s 1 ±s t. Upon further adjustment of the window pane 2, it is also detected when the torque M falls below the threshold value M max again and thus approaches the reference profile f ref again. In the example of FIG. 3, the detected torque M falls below the threshold value M max again at a second adjustment position s 2. With the adjustment position s 2 detected therewith, a second expected range s 2 ±s t is defined. Both expectation ranges together define a sub-region [s 1- s t; s 2+ s t], which is checked for subsequent presentations of the window pane 2 to determine whether or not an exceeding of the threshold value M max can be detected again. An adjustment position for the window pane 2 can be communicated to the control device 4, for example, on the basis of a signal from a Hall sensor of the drive device 3. Alternatively or additionally, a detection of a current ripple can be provided, which arises as a result of commutation at a drive motor of the drive device 3 provided for adjusting the window pane and with which a rotation of a drive shaft of the drive motor can likewise be evaluated in order to draw a conclusion about a current adjustment position of the window pane 2 that can be driven by the drive motor.In principle, the addition value s t can also be "0", so that then, for example, the interval limits for the sub-region correspond to the two adjustment positions s 1 and s 2. The specification of an expected range which comprises more than exactly one adjustment position can be advantageous here, however, in particular with regard to the fact that any recurring disturbance does not always start and end exactly at the same adjustment positions.If an exceeding of the threshold value M max up to a peak value M p1 has been detected for the first time in the subregion [s 1- s t; s 2+ s t] this first occurrence is logged into the detection memory 5 by setting an entry. In this case, for example, the adjustment positions s 1 and s 2, the peak value M p1 and a value for a measured value are stored with which frequency the exceeding of the threshold value M max has occurred in the sub-region [s 1- s t; s 2+ s t]. The simplest way of detecting the frequency is here, for example, a counter with which the frequency of the threshold value crossings that have occurred is counted. When the entry is generated in the detection memory 5, the counter thus receives the value "1.".If, in the further course of the adjustment of the window pane 2, the threshold value M max for the measured value course f 2 shown by way of example in FIG. 3 is exceeded again, a second entry is generated in the detection memory 5. According to the exemplary embodiment of FIG. 3, this second entry contains information about adjustment positions s 3 and s 4 and a peak value M p2 for the detected torque M reached in the further sub-region [s 3- s t; s 4+ s t].During the subsequent adjustment of the window pane in the respective subareas [s 1- s t; s 2+ s t] and [s 3- s t; s 4+ s t] along the adjustment path s ges, for which entries are stored in the detection memory 5, the control device 4 checks whether a deviation from the reference profile fref exceeding the threshold value M max has occurred again. If this is the case, the corresponding counter is incremented, i.e. increased by 1. If, during a subsequent adjustment, no (significant) deviation from the reference profile f ref that exceeds the threshold value M max occurs in the respective sub-region, the count is reduced by 1. If the count remains at the value "1" for a predefined number of changes, an entry in the detection memory 5 for the respective sub-region [s 1- s t; s 2+ s t] or [s 3- s t; s 4+ s t] is deleted again. It was thus obviously either a single interference event or the adjustment system has cured itself or the interference has been permanently eliminated.If, on the other hand, a disturbing event occurs repeatedly in a monitored sub-region [s 1- s t; s 2+ s t] and [s 3- s t; s 4+ s t] and a counter reading for the respective sub-region [s 1- s t; s2+st] or [s3-st thus rises in the detection memory 5; 4+ s t] on and reaching a stored frequency threshold value, a permanent fault in the respective sub-region [s 1- s t s 2+ s t] or [s 3- s t; s 4+ s t] is assumed. On the basis of the corresponding entry in the detection memory 5, an entry is then generated in the interference event memory 40 and / or the interference event signal e is generated, as explained above.In the case of recurring deviations in a subregion [s 1- s t; s 2+ s t] or [s 3- s t; s 4+ s t] exceeding the threshold value M max an indication of the peak value M p1 or Mp2nur is overwritten if a newly detected peak value in the respective subregion [s1-st; s2+st] or [s3-st; s 4+ s t] higher. Otherwise, the previously stored peak value is retained. In the fault event memory 40, for example, an entry for a fault event is thus generated which, in addition to specifying the respective interval limits and thus adjustment positions s 1, s 2 or s 3, s 4 contains the specification of the ascertained frequency and exactly one extreme value in the form of a maximum peak value over all detected repetitions. On the basis of the entries in the malfunction event memory 40, it is thus possible, for example, to read out comparatively easily from a workshop in which sections along the adjustment path s ges malfunctions and with which frequency during operation of the adjustment system have occurred and how high a maximum deviation from the reference profile f ref was. This can considerably simplify any repair that may be necessary.For the proposed solution, it is not absolutely necessary here for two expectation ranges, for example s 1 ±s t and s 2 ±s t, to be defined for a subregion to be monitored. Thus, for example, it can also be provided that after the threshold value M max is exceeded for the first time at the adjustment position s 1 both interval limits for the sub-region to be monitored are predefined on the basis of this one adjustment position s 1 for example a first interval limit identical to the adjustment position s 1 and a second interval limit from the adjustment position s 1 plus a predefined addition value Δs. The addition value Δs can be based here, for example, on empirical values. An associated sub-area would then be defined as an entry in the detection memory 5 with the limits s 1 and s 1+ Δs.In addition, an embodiment variant of a proposed solution can also provide that immediate measures have to be taken immediately in the case of specific deviations from the reference profile f ref classified as critical, since it is to be assumed here that the adjustment system can no longer reliably ensure specific functions. This relates, for example, in an adjustment system for adjusting a window pane 2 to the legally prescribed detection of a potential case of trapping. This recognition is especially relevant if the window pane 2 is intended to automatically assume its completely closed end position in a so-called automatic run upon a user command, without a user permanently actuating an operating element of the adjustment system.In the reference profiles f 3 and f 4 of FIG. 4, for example, in the adjustment range [s min; s max] a detected torque M deviates from the reference profile f ref by comparatively high values ΔM 1 or ΔM 2 and thus by an intolerable measure, and this also over a section Δs crit of the entire adjustment path s ges, which exceeds a minimum variable. For example, a significant decrease by ΔM 1 is detected in the measurement curve f 3 while an excessive increase by ΔM 2 is detected in the measurement curve f 4. In both cases, there is a risk that a case of jamming can no longer be detected reliably. With the corresponding torque fluctuation ΔM 1 or ΔM 2 a shut-off shaft is achieved which leads to a switching of the adjustment system 2 into an emergency operation. In this emergency operation, automatic running for the window glass 2 is blocked. Only in a workshop can the emergency operation be deactivated again in order to allow automatic operation again after checking the adjustment system. If necessary, reaching the switch-off threshold can also result in only a last-time user-controlled adjustment of the window pane 2 into the fully closed position being permitted and the drive device 3 then being deactivated.FIG. 5 shows, by way of example, a possible sequence for an embodiment variant of a control method implemented with the adjustment system of FIG. 1, which is implemented, for example, via software loaded into the control unit 4.First, according to a step S 1, the monitoring of the adjusting movement of the window pane 2 is provided. If it is determined in the context of this monitoring in a step S 2 that the reference curve f ref has weighed beyond a tolerable measure and therefore the stored threshold value M max for the torque M is exceeded, a subregion to be monitored is defined as a detection region in the detection memory 5 in a step S 3 as a reaction thereto. An associated entry is then based on expected ranges for entry and exit of a potential fault.When performing new adjustments (step S 4), it is then always checked, on the basis of the entry in the detection memory 5, whether the threshold value M max is exceeded again in the monitored sub-region. If this is the case, a counter for this sub-area is incremented incrementally. If the threshold value M max is not exceeded for the sub-region, the counter is reduced by 1 (steps S 5 and S 6).If a counter reading exceeds a counter threshold value and a frequency threshold value defined therewith for a monitored sub-region (step S 7), a recurring and thus permanent fault in the adjustment system on the sub-region is assumed (step S 8). In the event of a fault detected therewith, according to the exemplary embodiment of FIG. 1, an entry is generated in the fault event memory 40 of the control device 4 and / or a fault event signal e is transmitted, if appropriate only by wire within a vehicle having the delivery system and / or wirelessly, in particular via the Internet, to at least one user-side mobile device and / or a manufacturer of the vehicle, in order to inform the fault that has occurred and inform it of a maintenance and / or repair need associated therewith.List of reference characters1 Vehicle door 10 window opening 2 window pane (adjusting part) 3 drive device 4 control device (electronic control device) 40 fault event memory 41 interface 5 detection memory 6 receiver e fault event signal f 1, f 2, f 3, f 4 measured value profile f ref reference profile M torque (measured variable) M max threshold value M p1, M p2 peak value s 1, s 2, s3, s4adjustment position sgesadjustment path smin, s max monitoring end positions V1, V2 adjusting direction ΔM 1, ΔM 2 critical torque variation

Claims

Adjusting system for a vehicle, having - an adjusting part (2) which can be adjusted by external force, - a drive device (3) for adjusting the adjusting part (2) by external force, and - an electronic control device (4) for monitoring the adjustment of the adjusting part (2) in an adjusting range (s min- s max), wherein the electronic control device (4) is set up for monitoring the adjustment on the basis of at least one adjusting variable (M) which characterizes the adjustment and on the basis of reference values for the at least one adjusting variable (M) which are stored in the adjusting range (s min- s max) for adjusting positions of the adjusting part (2), characterized in that the electronic control device (4) is set up, in response to a first-time deviation of a detected value for the adjustment variable (M) from a reference value at at least one adjustment position (s 1, s 2, s 3, s 4) of the adjustment part (2), to define an expected range (s 1 ±s t, s 2 ±s t, s 3 ±s t, s4±st) which is defined from that adjustment position (s1, s2, s3, s 4) at which the deviation was determined for the first time, - for subsequent displacements of the displacement part (2), it is checked whether a deviation of a detected value for the displacement variable (M) from a reference value occurs again at at least one displacement position of the displacement part (2) lying in the expected range (s 1 ±s t, s 2 ±s t, s 3 ±s t, s 4 ±s t) and - to detect at least one measured value which is indicative thereof, with the frequency of deviations from a reference value during displacements of the displacement part (2) in a sub-region ([s 1- s t; s2+st], [s3-st comprising the expected range (s 1 ±s t, s 2 ±s t, s 3 ±s t, s 4 ±s t); s 4+ s t]) of the adjustment range (s min s max) have occurred.Adjustment system according to Claim 1, characterized in that the electronic control device (4) is furthermore configured to increase a value for the metric if a new deviation has occurred in the subregion ([s 1- s t; s 2+ s t], [ s 3- s t; s 4+ s t]) during a subsequent adjustment, or to reduce a value for the metric if a new deviation has occurred in the subregion ([s 1- s t; during the subsequent adjustment; s 2+ s t], [ s 3- s t; s 4+ s t]) no deviation has occurred.Adjusting system according to Claim 2, characterized in that the electronic control device (4) is furthermore configured to set the check as to whether a deviation of a detected value for the adjusting variable (M) from a reference value again occurs at at least one adjusting position of the adjusting part (2) lying in the expected range (s 1 ±s t, s 2 ±s t, s 3 ±s t, s 4 ±s t) if the value for the metric occurs during a subsequent adjustment in which no deviation occurs in the subregion ([s 1 s t; s 2+ s t], [ s 3- s t; s 4+ s t]) has occurred, has reached or maintains a lower limit value.Adjustment system according to Claim 2 or 3, characterized in that the electronic control device (4) is furthermore configured to determine a fault event for the adjustment system if the value for the measurement number reaches an upper limit value during a subsequent adjustment, in which a deviation has occurred again in the subregion ([s 1 s t; s 2+ s t], [ s 3- s t; s 4+ s t]) again.Adjusting system according to Claim 4, characterized in that the electronic control device (4) is set up to generate an entry of an interference event in an interference event memory (40) and / or to generate an interference event signal (e) for transmission to superordinate vehicle electronics, at least one mobile device and / or remote monitoring device in response to the determination of an interference event.Adjustment system according to one of the preceding claims, characterized in that the electronic control device (4) is configured to generate an entry in a detection memory (5) of the adjustment system in response to the first-time deviation of a detected value for the adjustment variable (M) from a reference value, with which entry the test for subsequent adjustments of the adjustment part (2) is established whether at least one in the expected range (s 1 ±s t, s 2 ±s t, s 3 ±s t, 4 ±s t) displacement position of the displacement part ( 2) again a deviation of a detected value for the displacement variable (M) from a reference value occurs.Adjusting system according to Claims 5 and 6, characterized in that the detection memory (5) is different from the fault event memory (40).Adjusting system according to one of the preceding claims, characterized in that the electronic control device (4) is configured to store a value for the absolutely greatest deviation from a reference value for the adjusting variable (M) which has occurred in the subregion ([s 1- s t; s 2+ s t], [ s 3- s t; s 4+ s t]).Adjustment system according to one of the preceding claims, characterized in that the expected range (s 1 ±s t, s 2 ±s t, s 3 ±s t, s 4 ±s t) includes the adjustment position (s 1, s 2, s3, s4) at which the deviation has occurred or corresponds to this adjustment position (s1, s2, s3, s4).Adjusting system according to Claim 9, characterized in that the electronic control device (4) is set up to determine the expected range (s 1 ±s t, s 2 ±s t, s 3 ±s t, s4±st) enclosing the adjusting position (s 1, s 2, s 3, s 4) for subsequent adjustments of the adjusting part (2) on the basis of the adjusting position (s1, s2, s3, s4), at which the deviation has occurred, and at least one additional value (s t) to be determined.Adjusting system according to one of the preceding claims, characterized in that the electronic control device (4) is configured to determine a plurality of expected ranges (s 1 ±s t, s 2 ±s t; s 3 ±s t, s 4 ±s t) for a sub-range ([s 1- s t; s2+st], [s3-st; s 4+ s t]) and / or define a plurality of subareas ([s 1- s t; s 2+ s t], [ s 3- s t; s 4+ s t]) for which at least one metric is detected in each case.Adjusting system according to one of the preceding claims, characterized in that the electronic control device (4) is configured to determine a deviation from a reference value for the adjusting variable on the basis of a threshold value (M max) being exceeded.Adjusting system according to Claims 11 and 12, characterized in that the electronic control device (4) is configured to set up a first expected range (s 1 ±s t; s 3 ±s t) for a sub-range ([s 1- s t; s 2+ s t], [ s 3- s t; s 4+ s t]) on the basis of a first adjustment position (s 1, s 3) at which the threshold value (M max) was exceeded for the first time during an adjustment movement of the adjustment part (2), and a second expected range (s 2 ±s t; s 4 ±s t) for the same sub-range ([s 1- st; s2+st], [s3-st; s 4+ s t]) on the basis of a second adjustment position, at which the threshold value (M max) has been undershot again when the adjustment movement is continued.Adjustment system according to one of the preceding claims, characterized in that the adjustment variable is a torque (M) detected or calculated for the adjustment of the adjustment part (2).Adjusting system according to one of the preceding claims, characterized in that the adjusting part is a window pane (2) for the vehicle or a component of an interior object, in particular a component of a vehicle seat.Adjusting system according to one of the preceding claims, characterized in that the electronic control device (4) is configured to switch into an emergency operation during an adjustment of the adjusting part (2) in response to exactly one deviation or at least two repeated deviations of a detected value for the adjusting variable (M) from a reference value by more than one shut-off shaft, in which an adjustment of the adjusting part (2) controlled by the electronic control device (2) takes place only on the basis of emergency operating parameters with which a previously possible automatic adjustment of the adjusting part (2) is blocked without an operation of at least one operating element of the adjusting system being maintained by a user.Adjustment system for a vehicle, in particular according to one of the preceding claims, having - an adjustment part (2) which can be adjusted by external force, - a drive device (3) for the external force-operated adjustment of the adjustment part (2), and - an electronic control device (4) for monitoring the adjustment of the adjustment part (2) in an adjustment range (s min- s max), wherein the electronic control device (4) is set up for monitoring the adjustment on the basis of at least one adjustment variable (M) characterizing the adjustment and on the basis of reference values stored in the adjustment range (s min- s max) for adjustment positions of the adjustment part (2) for the at least one adjustment variable (M), wherein, in normal operation of the adjustment system, automatic adjustment of the adjustment part (2) is possible, in which the adjustment part (2) is adjusted by external force without maintaining actuation of at least one operating element of the adjustment system by a user, characterized in that the electronic control device (4) is configured to switch, in response to exactly one deviation or at least two repeated deviations of a detected value for the adjustment variable (M) from a reference value by more than one shut-off shaft during adjustment of the adjustment part (2), into an emergency operation, in which adjustment of the adjustment part (2) controlled by the electronic control device (4) is only effected on the basis of emergency operating parameters with which the automatic adjustment is blocked.Method for controlling an externally actuated adjustment of an adjustment part on or in a vehicle, wherein an adjustment of the adjustment part (2) in an adjustment range (s min- s max) is monitored, to be precise on the basis of at least one adjustment variable (M) characterizing the adjustment and on the basis of reference values stored in the adjustment range (s min- s max) for adjustment positions of the adjustment part (2), for the at least one adjustment variable (M), characterized in that - in response to a first-time deviation of a detected value for the adjustment variable (M) from a reference value at at least one adjustment position (s 1, s 2, s 3, s 4) of the adjusting part (2) defines an expected range (s 1 ±s t, s 2 ±s t, s 3 ±s t, s 4 ±s t) which is dependent on that adjusting position (s 1, s2, s3, s4) at which the deviation was determined for the first time, - it is checked for subsequent adjustments of the adjusting part (2) whether at least one in the expected range (s1±st, s 2 ±s t, s 3 ±s t, s 4 ±s t) a deviation of a detected value for the adjustment variable (M) from a reference value occurs again, and at least one metric is detected which is indicative of the frequency with which deviations from a reference value during adjustments of the adjustment part (2) in a range within expectation (s 1 ±s t, s 2 ±s t, s3±st, s 4 ±s t) comprising a sub-region ([s 1- s t; s 2+ s t], [ s 3- s t; s 4+ s t]) of the adjustment range (sminsmax).Computer program product comprising instructions which, when executed by at least one processor of an electronic control device (4) of an adjustment system for the power-operated adjustment of an adjustment part (2) on or in a vehicle, cause the electronic control device (4) to execute a method according to claim 18.

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