Patent ID: 6114822
Filing Date: 2000-09-05
Classification: B60J,E05F,E05Y,G05B,G05D,H02H

Abstract:
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; andwherein 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.