System for measuring pressures on vehicle wheels, comprises tyre pressure sensor and transmitter on each wheel, means to find wheel speeds from pressure variations and comparisons with known speeds

摘要

A tyre pressure sensor (12) and transmitter (13) send tyre pressure data to a receiver (14) which converts the radio signal to digital information. The digital information is used by a control unit (17) to produce periodic pressure information for each wheel and a program module (179) compares the wheel speeds calculated from pressure variation with speeds derived from the anti blocking system smoothed output (15).