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Temporary key invalidation for electronic key and locking system

  • US 20060186988A1
  • Filed: 02/09/2005
  • Published: 08/24/2006
  • Est. Priority Date: 02/09/2005
  • Status: Active Grant
First Claim
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1. A system for inhibiting electronic vehicle keys left behind in the vehicle when the vehicle doors are locked, comprising:

  • one or more portable keys adapted to send wireless command signals;

    a vehicle security control module adapted to receive the wireless command signals from the one or more portable keys, wherein upon receiving a lock command signal, the vehicle security control module is configured to broadcast a short-range interrogation signal adapted to reach substantially only those of the one or more portable keys remaining within the vehicle, to receive a response containing a unique ID from those of the keys remaining within the vehicle thereby identifying themselves as left-behind keys, to store one or more inhibit flags identifying such left-behind keys as no longer valid and thereafter to ignore commands from such left-behind keys.

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