Comparative diagnosis of tyre pressures

Abstract

Though the reliability of car tyres has been improved in the recent years, a loss in tyre pressure still causes a lot of accidents. Current systems for detection of a tyre pressure drop have not been applied so far, because they either require too expensive sensors, or they work correctly only in limited driving situations, like in straight runs with constant speed. In this paper a new approach is presented requiring only the exact measurement of the four wheel speeds, which are available in all cars having ABS-systems. The algorithm is able to detect a tyre pressure loss during straight runs as well as in turns. By detecting strong accelerations of the car, false alarms can be prevented.<>