DEVICE AND METHOD FOR REAL-TIME ESTIMATION OF AVAILABLE ADHERENCE

Device for the estimation of a land vehicle adhesion, comprising electronic computing means installed in a vehicle, configured to acquire the signals detected by at least a triaxial accelerometer integral to the vehicle; a steering angle meter; a plurality of encoders, configured to measure the angular velocity of each wheel of said vehicle; a plurality of temperature sensors, configured to acquire the outer temperature of each tyre; pressure sensors configured to acquire the inner air pressure of each tyre, characterized in that computer programs are loaded on said electronic computing means, and are configured: (100) to estimate the inner temperature of each tyre as a function of the outer temperature and inner air pressure; (200) to calculate the angular velocity (w) and the components of the velocity of translation (V, V) for each tyre; (300) to determine the slip ratio (sr) and the slip angle (sa) for each tyre, as a function of the velocity of translation (Vx, Vy), of the angular velocity (w) and of the tyre rolling height (R); (400) to calculate the longitudinal, lateral and vertical components (Fx, Fy, Fz) of the forces exchanged by each tyre with the ground; (500) to estimate the values of the instantaneous coefficient of friction from the equations of dynamic balance on each tyre; (600) to compare the values of the coefficient of friction calculated at point (550) with the estimation of the maximum coefficient of friction estimated in the same vertical load (Fz), kinematic and thermodynamic conditions.