Patent ID: 6531840
Filing Date: 2003-03-11
Classification: H02H

Abstract:
A power window apparatus comprising:a driving part for opening and closing the window of an automobile; a pulse generation part for generating a pulse corresponding to the operation of the driving part; torque value detection means for detecting a torque value outputted by the driving part; torque value storing means for storing a reference value of torque and a first determination value larger than the reference value for each block of a plurality of blocks dividing the whole travel range of the window; and a control part for comparing the torque value detected during the operation of the driving part with a first determination value of the block in which the window is positioned at that time each time the pulse is generated, so as to determine pinching when the torque value is larger than the first determination value and to stop or operate the driving part in reverse, wherein the control part, only when the torque value is larger than a reference value of the block in which the window is positioned, adds a correction value in proportion to a difference between the torque value and the reference value to the first determination value so as to provide a second determination value, thereby, at the time of the next detection of the torque value, determining pinching when the torque value is larger than the second determination value.