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Automatic venting system for a vehicle with obstruction detection utilizing dynamically modified thresholds

  • US 5,539,290 A
  • Filed: 11/28/1994
  • Issued: 07/23/1996
  • Est. Priority Date: 03/12/1993
  • Status: Expired due to Fees
First Claim
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1. A method of controlling an electric motor associated with an opening in a vehicle, said method comprising:

  • monitoring an operating current provided to said motor;

    detecting an obstacle in the opening by analysis of the monitored operating current with respect to a threshold condition;

    determining an average value of said operating current;

    modifying the threshold condition based on the determined average value; and

    generating a signal in response to the detection of an obstacle.

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