TYRE PRESSURE WARNING SYSTEM

摘要

A tyre pressure monitoring system for a vehicle that has a plurality of sensor/transmitter units (2, 4) one for each tyre of the vehicle. Each sensor/transmitter unit has a pressure transducer (2) and a processor (14). The processor (14) compares a current pressure signal from the transducer with a pressure signal stored in its memory which corresponds to the pressure first encountered on installation of the transducer. The processor (14) includes means to transmit a fault signal when the current pressure signal differs from the stored pressure signal by more than a predetermined amount. A control unit (6) receives fault signals from the transducers and includes means (24) for indicating that a fault has occurred.