Patent ID: 6684691
Filing Date: 2004-02-03
Classification: B60C,B60T

Abstract:
A method of detecting tire pressure imbalances in a set of tires of a vehicle, the vehicle having four wheels, a right front wheel, a left front wheel, a right rear wheel and a left rear wheel, each of the four wheels having a sensor generating a pulse for a predetermined amount of distance traveled by the respective wheel, said method comprising the steps of:initiating a calibration mode; accumulating a number of pulses generated by each sensor during a predetermined calibration time interval; storing the number of pulses generated by each sensor during a measured interval equal in length to the calibration interval into an individual account for each sensor in a storage device; computing a stability check using the number of pulses stored in the individual accounts, discarding the numbers stored in the individual accounts if the stability check is unsatisfactory; summing the number of pulses in each of the accounts for a comparison total for each measured interval not discarded; comparing the comparison total to the calibration standard; and triggering an alarm when the comparison total is less than the calibration standard for a predetermined number of measured intervals.