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Methods and systems for controlling vehicle defrost units

  • US 8,745,998 B2
  • Filed: 08/30/2010
  • Issued: 06/10/2014
  • Est. Priority Date: 08/30/2010
  • Status: Active Grant
First Claim
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1. A method for controlling a defrost unit for a vehicle, the defrost unit comprising an electric grid, the method comprising the steps of:

  • determining a dew point proximate the vehicle;

    determining a resistance of the electric grid;

    determining a surface temperature proximate a surface of the vehicle using the resistance of the electric grid; and

    automatically activating the electric grid when the surface temperature is less than the dew point.

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