Method for the contactless approach of the lower stop position of a motor vehicle window operated by extraneous force
First Claim
1. A method for a contactless approach of a lower stop position of a motor vehicle window pane operated by extraneous force comprising:
- generating path-dependent sensor signals during the lowering of the window pane by using a sensor device;
forwarding the sensor signals to an electronic evaluation unit in which the sensor signals are counted;
compensating for system deficiencies of a window raising mechanism during a first phase (A) of the adjustment movement of a drive;
lowering the window pane during a second phase (B) of the adjustment movement of the drive;
switching the drive off on reaching a certain count which lies, by the amount of a slowing-down path to be expected based on the lowering speed of the window pane, in front of a position of a fixed contactless stop;
wherein the first phase (A) and the second phase (B) of the adjustment movement of the drive are separated by a boundary value of a measured value reflecting a system state of the window raising mechanism so that the sensor signals of the first phase (A) can be associated with compensating cable slack and the sensor signals of the second phase (B) can be associated with the actual window pane movement; and
wherein an expected slowing-down path of the window pane is determined by using at least one of the operating voltage of the drive or the lowering speed of the window pane.
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Accused Products
Abstract
The invention relates to a method for contactless approach of a lower stop position of a motor vehicle window pane operated by extraneous force using a sensor device which during lowering of the window pane generates path-dependent signals and forwards them to an electronic evaluation unit in which the sensor signals are counted. During two separate phases (A) and (B) system deficiencies of a window raising mechanism are compensated and the pane is lowered. On reaching a certain counting state which lies in front of the position of the fixed contactless stop, a drive is switched off. The first phase (A) and the second phase (B) of the adjustment movement of the drive are separated by a boundary value (2) which reflects a system state of window winding raising mechanism so that the sensor signals of the first phase (A) can be associated with compensating cable slack and the sensor signals of the second phase (B) can be associated with the actual movement of the window. For determining the slowing-down path of the window pane which is to be expected the operating voltage of the drive is used in addition to the lowering speed of the window.
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Citations
9 Claims
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1. A method for a contactless approach of a lower stop position of a motor vehicle window pane operated by extraneous force comprising:
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generating path-dependent sensor signals during the lowering of the window pane by using a sensor device; forwarding the sensor signals to an electronic evaluation unit in which the sensor signals are counted; compensating for system deficiencies of a window raising mechanism during a first phase (A) of the adjustment movement of a drive; lowering the window pane during a second phase (B) of the adjustment movement of the drive; switching the drive off on reaching a certain count which lies, by the amount of a slowing-down path to be expected based on the lowering speed of the window pane, in front of a position of a fixed contactless stop; wherein the first phase (A) and the second phase (B) of the adjustment movement of the drive are separated by a boundary value of a measured value reflecting a system state of the window raising mechanism so that the sensor signals of the first phase (A) can be associated with compensating cable slack and the sensor signals of the second phase (B) can be associated with the actual window pane movement; and wherein an expected slowing-down path of the window pane is determined by using at least one of the operating voltage of the drive or the lowering speed of the window pane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification