Patent ID: 8060277

Claim:
Suspension control method for a motor vehicle body on its wheels, having a computer (CSS) adapted to calculate a control magnitude (ER) for an actuator (M) of at least one variable damper (AM) of the suspension (S) as a function of at least one modal setpoint force of the damper, calculated as a function of at least an absolute body modal speed V mod determined on the vehicle, wherein the method comprises: detecting the wheel displacement with respect to the body for each wheel, calculating, as a function of at least the displacement measurements of the wheels provided by said displacement sensors, a variable damping modal gain b mod , for calculating a first damping setpoint modal force F mod according to the formula: F mod =âˆ’b mod Â·V mod calculating the setpoint force of the damper as a function of the first setpoint modal force F mod , wherein the mode is at least one among vertical heave b z , roll b Î¸ , and pitch b Ï†, and wherein the variable damping modal gain comprises at least one reset multiplier coefficient b zREC , b Î¸REC , b Ï†REC , the reset multiplier coefficient b zREC for heave is equal to b z â¢ â¢ REC = k z Â· M â¢ â¢ S â¢ â¢ U â¢ â¢ S k z â¢ â¢ REF Â· M â¢ â¢ R â¢ â¢ E â¢ â¢ F , the reset multiplier coefficient b Î¸REC for roll is equal to b Î¸ â¢ â¢ REC = k Î¸ Â· I Î¸ k Î¸ â¢ â¢ REF Â· I Î¸ â¢ â¢ REF , the reset multiplier coefficient b Ï†REC for pitch is equal to b Ï† â¢ â¢ REC = k Ï† Â· I Ï† k Ï† â¢ â¢ REF Â· I Ï† â¢ â¢ REF where k zREF is a constant, reference heave stiffness, k Î¸REF is a constant, reference roll stiffness, k Ï†REF is a constant, reference pitch stiffness, I Î¸REF is a constant, reference roll moment of inertia, I Ï†REF is a constant, reference pitch moment of inertia, MREF is a constant reference mass, I Î¸ is a roll moment of inertia, calculated as a function of at least the displacements, I Î¸ is a pitch moment of inertia, calculated as a function of at least the displacements, MSUS is a vehicle sprung mass, calculated as a function of at least the displacements, k z is a heave stiffness, calculated as a function of at least the displacements, k Ï† pitch stiffness, calculated as a function of at least the displacements, k Î¸ is a roll stiffness, calculated as a function of at least the displacements.