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System for determining a change in vehicle tire pressure

  • US 7,187,273 B2
  • Filed: 05/07/2004
  • Issued: 03/06/2007
  • Est. Priority Date: 05/09/2003
  • Status: Active Grant
First Claim
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1. A tire pressure diagnostic method for at least one tire in a moving vehicle, comprising:

  • determining a first traveled distance d1 based on output from at least one tire movement sensor and a predetermined value of a radius of the tire;

    receiving a plurality of navigational inputs;

    determining a second traveled distance d2 from the plurality of navigational inputs; and

    comparing d1 and d2 to diagnose the tire pressure.

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