Method for reducing the risk of rollover of an automotive vehicle provided with a controllable suspension system

A method for reducing the rollover risk of an automotive vehicle (10) including a controllable suspension system (24-27), which comprises:

• a first step of calculating, on the basis of a plurality of signals delivered by sensors (28, 29) of the controllable suspension system, a measured quantity (TCm) as an active value (TC) of a load transfer;
• a second step of calculating an estimated quantity (TCe), on the basis of signals delivered by kinematic sensors (50-58) placed onboard the vehicle (10) and a dynamic model (M) of the vehicle, said estimated quantity being taken as an active value of the load transfer when the measured quantity is not available;
• a step of evaluating the rollover risk on the basis of the active value (TC) of the load transfer;
• and, in the event of increased rollover risk, and
• a step of the emitting a safety signal (S), the safety signal (S) being taken into account in i) an actuating step of a controllable attitude correction system or ii) a step for regulating the propulsion and/or steering means of the vehicle, so as to avoid rollover of the vehicle,
• wherein, when the measured quantity (TCm) is available, the method includes a recalibration step for recalibrating at least one parameter (H, G) of the dynamic model (M) of the vehicle used in the second calculation step, said recalibration step comprising:
• evaluating a deviation between the measured quantity (TCm) and the estimated quantity (Tce), and, when said deviation exceeds a threshold value (e0),
• developing a law of evolution over time of said at least one parameter, the time evolution law tending to reduce the deviation;
• and, when the measured quantity (TCm) is available, and
• modifying, upon each iteration of the second calculation step, the parameter of the dynamic model of the vehicle by using the time evolution law.