Method to restrict the excess force of an electrically controlled assembly operated by a strange force in the range of its closing position of a motor vehicle window lift

摘要

A method for restricting the surplus force of an electrically controlled assembly operated by a foreign force, which can be used with particular advantage in connection with window lifters which are fitted with an anti-jam detection device. The method is characterized by a high automatic adaptation to the markedly fluctuating external conditions to which a window lifter is subjected, and by the compensation of system-conditioned fluctuations. The position of the assembly is continuously determined during the displacement process and at least one measured value correlated with the displacement force of the assembly is recorded in the inlet area of the stop position. This measured value is increased through the electronics unit by a predetermined amount and defined as a switch-off criterion so that the drive is switched off when this criterion is exceeded or understepped.