Method to control the active shock absorbers of a road vehicle featuring the lowering of the center of gravity
AssigneeFerrari S.P.A.
InventorsFederico Favalli, Francesca Mincigrucci
Life of this patent
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Abstract
Method to control active shock absorbers of a road vehicle. Each active shock absorber is part of a suspension connecting a frame to a hub of a wheel and is provided with an actuator. The control method comprises the steps of: determining a longitudinal acceleration and a transverse acceleration of the road vehicle; establishing a desired lowering of a centre of gravity of the road vehicle depending on the longitudinal acceleration and on the transverse acceleration; and controlling the actuator of each active shock absorber so as to obtain the desired lowering of the centre of gravity.
Claims12
A method to control active shock absorbers (6) of a road vehicle (1);
- each active shock absorber (6) is part of a suspension (5) connecting a frame (4) to a hub (3) of a wheel (2) and is provided with an actuator (10);
- the control method comprises the steps of:
- determining a longitudinal acceleration (ax) and a transverse acceleration (ay) of the road vehicle (1);
- establishing a first contribution of a desired lowering (hb-TGT) of a centre (B) of gravity of the road vehicle (1) only depending on the longitudinal acceleration (ax);
- establishing a second contribution of the desired lowering (hb-TGT) of the centre (B) of gravity of the road vehicle (1) only depending on the transverse acceleration (ay);
- establishing the desired lowering (hb-TGT) of the centre (B) of gravity of the road vehicle (1) that is equal to the contribution having the greater absolute value;
- and
- controlling the actuator (10) of each active shock absorber (6) so as to obtain the desired lowering (hb-TGT) of the centre (B) of gravity.
Dependencies are inferred from the claim text.