| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tire air-pressure monitoring system which can judge the presence/absence of a tire rotation accompanying a tire air-pressure adjustment while being a low cost system by one unit of a receiver 1. <P>SOLUTION: This tire air-pressure monitoring system is equipped with sensor units 1, 2, 3 and 4 which are provided on tires 13, 14, 15 and 16 of a vehicle, and have an air-pressure sensor and a transmitter, a receiver 9, and a control ECU 10 which emits an alarm for notifying passengers of the reduction of the tire air-pressure when the air pressure of each tire has become an air-pressure alarming threshold value or lower. In the tire air-pressure monitoring system, the receiver 9 which receives the electric wave being transmitted from the sensor unit of each tire is provided as the receiver. The control ECU 10 judges the presence/absence of the tire rotation from the variation of the air pressure of each tire during traveling prior to the stopping of the engine of the vehicle, and the air pressure of each tire during traveling after the starting of the engine of the vehicle. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
