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Power window controller having function to prevent pinching

  • US 6,274,947 B1
  • Filed: 05/19/1999
  • Issued: 08/14/2001
  • Est. Priority Date: 05/20/1998
  • Status: Expired due to Fees
First Claim
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1. A power window controller comprising:

  • means for detecting a rotational speed of a motor that drives a power window;

    means for detecting a variation rate of the rotational speed of the motor when the motor drives the power window in a closing direction;

    means for determining a threshold value of the variation rate;

    means for detecting a position of the power window;

    means for adjusting the threshold value, based on the variation rate and the window position, to obtain an adjusted threshold value;

    means for determining that a pinching situation exists if the variation rate is larger than the adjusted threshold value; and

    means for opening the power window when the pinching situation exists.

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