Abstract:
A method of bridging partial tightnesses of moveable members received in guides and driven by electric drive motors provides an automatic monitoring function. Within a tightness region, a releasing force is varied in one or several steps. An automatic bridging function is utilized, which corresponds to the rotary speed course, and an automatically operating control operates so that the releasing force is increased only in a limited region of the identified bridging location.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a method of monitoring a partial tightness on movable members, such as for example window panes or movable roof. These components of motor vehicles are provided in increased numbers in the electrical drive which are operatable remotely. Tightness occurs when, for example, wind deflectors which are arranged before the movable roofs are subjected to increased air resistance while traveling with increased traveling speed. In these situations an actuation of removable roof occurs. 
     Manual bridging functions are provided for electrical drives utilized for actuation of window panes or movable roofs, so that the driven displaceable members at the location of a tightness can be moved by hand over the tightness location. A manual engagement of the operator during driving of a vehicle distracts it and can lead to critical traveling situations, in which the driver may not pay undivided attention to the traffic. 
     In other embodiments of the window panes or movable roofs, reference runs are provided in the movable systems. The reference runs load not insignificantly the electrical drive, since they have a calibration function. Reference runs moreover are time consuming, and during the reference runs not all operations occur, which later during operation of the window panes or movable roofs can occur. 
     SUMMARY OF THE INVENTION 
     Accordingly, it is an object of the present invention to provide a method of bridging of partial tightness of movable members, which avoids the disadvantages of the prior art. 
     In keeping with these objects and with others which will become apparent hereinafter, one feature of present invention resides, briefly stated, in a method of bridging partial tightness of a movable members, in accordance with which an automatic monitoring function is provided, and within a tightness region a releasing force is varied in one or several steps. 
     With the inventive solution, an automatic bridging function is utilized, which corresponds to the rotary speed course. An automatically operating control operates so that only in the small limited region of the bridging location which is identified as such, the releasing force is increased by a certain amount. When a one-time increase of the releasing force is not sufficient for a certain amount to overcome the tightness location, then it is increased by automatic bridging function in a stepped manner in several starting routines to a maximum value. When with a releasing force below the maximum releasing force, the overcoming of the tightness location is performed, then the releasing force required for overcoming the obstacle is stored in an adaptive storage unit. The maximum value of the releasing force can be preset on the automatic bridging function, so that depending on the application, predetermined maximum releasing forces are provided or can be allowed. Also the step widths at which the reducing force is raised within the starting routine in a stepped manner can be preselected variably for the automatic bridging function. 
     The stepped increase of the releasing force can be embedded for example in a first run to an obstacle with subsequent reversing of the drive. If the obstacle is located outside of the region in which the tightless location is localized, the drive is reversed. If the tightness location is inside the back window, the releasing force is increased only in the region in which the tightness location is provided. After several starts and runs on the obstacle, a stepped increase of the releasing force in the region of the back window is provided, until the maximum fixed releasing force is achieved. 
     When the obstacle representing the tightness location is finally overcome without reversing of the electrical drive, the rotary speed adaptation can be adjusted to the changed obstacle. The releasing force which directly overcomes the obstacle or the rotary speed adaptation can be stored in a storage which is associated with the automatic bridging function. 
     The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a view showing a rotary speed course of an electric drive with a tightness location to be overcome; and 
     FIG. 2 is a view showing a bridging function as a status automating system. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     FIG. 1 shows a rotary speed course of an electric drive with a tightness location to be overcome. 
     FIG. 1 shows both the adjusting rotary speed break on the electrical drive, and also the releasing force increase released by the passage of a tightness region  4 . 1 . The rotary speed course  1  over the path  2  is plotted above in FIG. 1 in the rotary speed/path diagram. In the tightness region  4 . 1  to be overcome a rotary speed break is provided. It extends not on a discrete location of a traveling path  2 , but instead over a traveling path region  4 . 1 . With the inventive proposed procedure, the force which is required for overcoming the tightness region  4 . 1  is increased in stepped fashion, until the driven member to be moved, for example a window pane or a movable roof, smoothly passes the tightness region  4 . 1  without reversing the electrical drive. 
     In the lower region of the diagram of FIG. 1, the releasing force  3  is plotted over the path  2 . In the upper diagram of FIG. 1 the tightness region  4 . 1  is transmitted to the lower diagram. Within the tightness region  4 . 1  which releases an automatic bridging function, a stepped increase of the releasing force is provided. After this, a new start of the tightness region  4 . 1  with increased releasing force takes place. The increased releasing force has its limit in the preset maximum permissible value of the releasing force which is predetermined on the automatic bridging function. The maximum value for the releasing force is identified in the lower diagram of FIG. 1 with reference numeral  9 . Depending on the predetermined releasing force increase steps, the starting routines  15 ,  19  shown in FIG. 2 are performed so often, until n required releasing force increase steps are worked off. In an adaptive storage system the predetermined releasing force value 5 can be overwritten by such value for the releasing force, which allows to overcome directly the tightness region  4 . 1  for the movable member. 
     The rotary speed of an electric drive can be adapted to a partial tightness, such as for example the one which can occur with wind deflectors on removable roofs. The rotary speed values adapted to the actual conditions can be stored in the storage system. 
     From the consideration of the bridging function as a condition automated system of FIG. 2, it can be seen that, starting from the start and an aim, or an end point of the processing of the automatic bridging function routine, a first clamping inquiry  13  and performed. When this condition of the movable member is recognized, the position of the region  4 . 1  is stored, the time limiter is set and the electrical drive is reversed. This is performed by a clamping parameter storage  14 , from which the monitoring block  12  which contains in the condition automatic system  10  is branched. There a first clamping force increase  16  is performed, which is transmitted then by the control of the electrical drive in the first starting routine  15  to the movable member. It is monitored whether inside the first run starting routine  15  the course of the electrical drive is ended normally, or the new clamping situation occurs. If the motor running ends normally, the increase of the clamping force which is performed in the position  16  in the monitoring block is again retaken. 
     When to the contrary, within the first running routine  15  to be performed the running of the electrical drive ends not normally, a new clamping situation occurs. The new clamping situation is verified by an additional inquiry  19  in the monitoring block  12 . The second clamping inquiry  13  with a positive result activates a new clamping increase at the position  18 , so that now after the resulting processing of the first starting routine  15 , the second starting routine  19  can be performed with an increased value for the clamping force to be applied. After the increase of the releasing force and performing of the second starting routine  19 , a testing  21  is performed of the condition, whether the electrical drive ends its running normally or it comes again to the clamping situation. Thereafter, the new clamping force increase  18  is taken, before the starting or aiming point  11  is branched. 
     In addition to the starting routines  15 ,  19  which can be performed with different releasing forces, the monitoring block  12  monitors whether for example a previously set motor stoppage time of for example  10  seconds is exceeded or not. If it is exceeded, the starting or aiming inquiry point  11  is branched, and the automatic bridging function is set back. A setting back of the automatic bridging function can be performed when during the inquiry  25  of the control of the electrical drive, a rotary speed reverse on the electrical drive occurs. During the occurrence of a rotary direction reverse, the movable member, whether a window pane or a movable roof, is moved back to its open position. Also, in the closed position of the corresponding movable member, the automatic bridging function  10  is set back. 
     The diagram of FIG. 2 shows a course of the automatic bridging function. 
     First a first start on an obstacle which produces a tightness is performed. The electrical drive for driving the member to be moved is reversed and the member moves out of the tightness region if the obstacle must lie outside of the tightness region  4 . 1 . 
     If the obstacle is located in the tightness region  4 . 1 , the electrical drive is reversed. By means of the automatic bridging function, an increase of the releasing force is performed for example as F&gt;100 N. Thereafter a new start of the member to be moved is performed in the tightness region by running of the first starting routine  15 . If it comes again to a clamping situation, by running of the second starting routine  19 , a second run with a stepped increase of the releasing force is performed, to overcome the obstacle represented by the tightness region  4 . 1 . These starts are performed with a corresponding stepped increase of the releasing force until the stepped increase releasing force assumes the predetermined maximum value of the releasing force  9  (compare FIG.  1 ). If the obstacle can be finally overcome, the releasing force can be stored and associated with the corresponding path region  4 . 1  on which the tightness region  4 . 1  was found. In this way a force threshold adapted to the movement path to be overcome is adjusted for the releasing force, so that the electrical drive which drives the member to be moved is adapted to the tightness region  4 . 1  in the sense of the rotary speed and the releasing force. The path portion  2  to be covered is driven with a predetermined releasing force  5 , and during detection of the previously stored tightness region  4 . 1  the electrical drive is operated with a stepped increased releasing force. 
     It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above. 
     While the invention has been illustrated and described as embodied in method of bridging partial tightness on movable members, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention. 
     Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention. 
     What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims: