Patent ID: 7432801
Filing Date: 2008-10-07
Classification: B60C

Abstract:
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.