To provide a tire pressure warning system by which safety is further improved.
A tire pressure warning system emits a tire pressure decrease warning, based on a relationship between tire temperature and reference tire pressure, if the tire pressure is lower than a first tire pressure warning threshold value with respect to the reference tire pressure, and after emitting the tire pressure decrease warning, terminates the tire pressure decrease warning if the tire pressure is higher than a second tire pressure warning threshold value with respect to the reference tire pressure. In this system, the first tire pressure warning threshold value is lower than the second tire pressure warning threshold value, and a difference between the first tire pressure warning threshold value and the second tire pressure warning threshold one is structured to be smaller in case that the tire temperature is higher than a predetermined temperature threshold value than in case that the tire temperature is lower than the predetermined temperature threshold value.
COPYRIGHT: (C)2010,JPO&INPIT
| JP2005088613A | 2005-04-07 |
| WO2008119524A1 | 2008-10-09 |
Yusuke Murata
Tomoyuki Miki