Patent ID: 6748798
Filing Date: 2004-06-15
Classification: B60C

Abstract:
A method for detecting decrease in tire air-pressure, which detects decrease in internal pressure of a tire on the basis of rotational information obtained from tires attached to a vehicle, the method comprising the steps of: detecting rotational information of the respective tires; storing rotational information of the respective tires; detecting whether the vehicle is running on a flat road or not; detecting whether the vehicle is accelerating or decelerating; comparing rotational information of both front wheels with rotational information of both rear wheels when it has been determined that the vehicle is running on a flat road and that the vehicle is neither accelerating nor decelerating; and judging simultaneous decompression of both front wheel tires or simultaneous decompression of both rear wheel tires on the basis of a relationship between a value obtained through comparison of the rotational information of both front wheels and both rear wheels and a specified threshold.