Ferrari S.p.a.

Francesca Mincigrucci

Stefano Varisco

Alessandro Flumeri

Federico Favalli

Fabio Tancredi

A method to control an active shock absorber of a road vehicle. The active shock absorber is part of a suspension connecting a frame of the road vehicle to a hub of a wheel and has: a first element, which defines an end of the active shock absorber, a second element, which defines another end of the active shock absorber and is mounted so as to slide relative to the first element; and an actuator, which is configured to generate a force, which is applied between the two elements. The control method comprises the steps of: determining a vertical acceleration of the hub; determining a speed of translation between the two elements of the active shock absorber; determining a target force for the actuator of the active shock absorber based on the vertical acceleration of the hub and based on the speed of translation between the two elements of the active shock absorber; and controlling the actuator () of the active shock absorber so as to pursue the target force.

Method to control an active shock absorber of a road vehicle

A method for determining an optimized torque distribution to the wheels of a road vehicle comprising the steps of determining a table of distribution of the torque between a front axle and a rear axle; determining a second table and a third table of distribution of the torque between a right wheel and a left wheel of the rear axle and of the front axle, respectively; detecting the current longitudinal dynamics; using the first, the second and the third table to determine a current value of the first, of the second and of the third distribution factor, respectively, based on the current longitudinal speed and on the current longitudinal acceleration of the road vehicle.

Method for determining an optimized torque distribution to the drive wheels of a road vehicle and relative road vehicle

A method to control a road vehicle driven by a driver and provided with at least a first drive wheel and a second driver wheel belonging to a same axle, each drive wheel being independently operated by a respective first and second electric motor; the control method comprises the step of controlling the torque delivered by each respective motor to the first drive wheel or to the second drive wheel as a function of a torque requested by the driver and independently of the difference in angular speed between the first and the second wheel.

Control method for a road vehicle with independent engines acting on the wheels of the same axle and relative road vehicle

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 roll angle based on the transverse acceleration; and establishing a desired pitch angle based on the longitudinal acceleration.

Method to control the active shock absorbers of a road vehicle featuring the adjustment of the roll angle and of the pitch angle

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.

Method to control the active shock absorbers of a road vehicle featuring the lowering of the center of gravity

A method to control, while driving along a curve, a road vehicle with a variable stiffness and with rear steering wheels. The method comprises the steps of: determining an actual attitude angle of the road vehicle; establishing a desired attitude angle; determining an actual yaw rate of the road vehicle; establishing a desired yaw rate; and changing, in a simultaneous and coordinated manner, the steering angle of the rear wheels and the distribution of the stiffness of the connection of the four wheels to the frame depending on a difference between the actual attitude angle and the desired attitude angle and depending on a difference between the actual yaw rate and the desired yaw rate.

Method to control, while driving along a curve, a road vehicle with a variable stiffness and with rear steering wheels

A method for the driver assistance of a road vehicle; the assistance method comprises the steps of: determining an actual steering angle of the front wheels; determining a desired steering angle of the front wheels; and changing the servo-assistance torque applied by a servo-assistance device to a steering system based on the actual steering angle and on the desired steering angle, so that the servo-assistance torque that is applied when a steering wheel is rotated in a first direction to change the actual steering angle causing it to approach the desired steering angle is greater than the servo-assistance torque that is applied when the steering wheel is rotated in a second direction, which is opposite to the first direction, to change the actual steering angle causing it to distance itself from the desired steering angle.

Method for the driver assistance of a road vehicle

A method to control a road vehicle with steering rear wheels when driving along a curve. The control method comprises the steps of: determining an actual attitude angle of the road vehicle; determining a desired attitude angle; and changing the steering angle of the rear wheels based on the difference between the actual attitude angle and the desired attitude angle.

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Modena, Italy

Francesca Mincigrucci