| 摘要 |
<p>An apparatus for alarming a decrease in tyre air pressure which alarms the decrease in inner pressure of the tyre by using a judged value calculated based on wheel speed information obtained from tyres fitted to a four-wheeled vehicle. The apparatus comprises calculating means (4b) for calculating the judged value based on the wheel speed information on each of the tyres, the calculating means being connected to an on-vehicle LAN (3), via which the wheel speed information on each of the tyres is transmitted. The calculating means (4b) captures the wheel speed information on each of the tyres via an on-vehicle LAN (3). The wheel speed information is converted into the digital data, which is then captured into the apparatus (4) for alarming the decrease in tyre air pressure via the on-vehicle LAN (3), this remarkably reducing the number of lines laid in the vehicle in comparison with the prior art. <IMAGE></p> |
