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System and method for detecting a rapid leak from a tire

  • US 7,432,801 B2
  • Filed: 06/17/2005
  • Issued: 10/07/2008
  • Est. Priority Date: 06/18/2004
  • Status: Expired due to Fees
First Claim
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1. A method of detecting a rapid leak of gas contained in an automobile tire based on periodic measurements of a pressure Pa and a temperature Ta of the gas, the method comprising:

  • determining a reference pressure Pcref;

    calibrating a safety threshold So as a function of the precision of a pressure sensor used to measure pressure Pa, the precision of a temperature sensor used to measure temperature Ta, and the response time of the temperature sensor over each measurement acquisition period;

    calculating an alarm threshold pressure Sref from the reference pressure Pcref, wherein the alarm threshold pressure Sref is determined as a function of the safety threshold So;

    calculating a temperature-compensated pressure Pc at each measurement acquisition period; and

    comparing the compensated pressure Pc with the alarm threshold pressure Sref, wherein the leak is detected if the compensated pressure Pc is less than the alarm threshold pressure Sref.

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