Patent ID: 6696934
Filing Date: 2004-02-24
Classification: B60C

Abstract:
A method for alarming a decrease in tire air-pressure in which a decrease in internal pressure of a tire is detected on the basis of rotational information obtainable from wheels mounted to a vehicle and a driver is accordingly alarmed, comprising the steps of:detecting rotational signals of respective tires; storing rotational information upon calculation of the rotational signals of the respective tires; setting a plurality of thresholds for judging air-pressure when the vehicle is traveling on a bad road; judging, on the basis of rotational information of the respective tires, that the vehicle is traveling on a bad road; and judging a decrease in air-pressure of a tire on the basis of a judged value which is calculated from the rotational information of the respective tires, when it has been judged that the vehicle is traveling on a bad road.