C.r.f. Societa Consortile Per Azioni

Politecnico Di Milano

Fiat Group Automobiles S.p.a.

Sebastiano Campo

Sergio Matteo Savaresi

Stefano Re Fiorentin

Matteo Corno

Maurizio Miglietta

Cristiano Spelta

Andrea Saroldi

Gianfranco Burzio

Renzo Cicilloni

Diego Delvecchio

Gabriele Bonaccorso

Nicola Natali

Andrea Fortina

Vincenzo Murdocco

Fabio Ghirardo

Domenico Albero

Pier Claudio Antonello

Angela Chinu

Silvia Citelli

Valter Quenda

A method for controlling four semi-active suspensions of a vehicle comprising the steps of: determining, for each semi-active suspension, a first and a second signal representative of the acceleration and speed of the sprung mass; determining, for a pair of semi-active suspensions arranged on one side of the vehicle a third and a four signal representative of the acceleration and pitch speed; calculating for each semi-active suspension, a first damping coefficient as a function of the difference between the first and second signal squared; calculating for each semi-active suspension, a second damping coefficient as a function of the difference between the third and the four signal squared; for each semi-active suspension, comparing the first and the second damping coefficient for determining the higher coefficient; applying to each force generator device, an electronic control signal indicative of the respective high damping coefficient.

Control of a suspension system of a vehicle provided with four semi-active suspensions

The system comprises: detector devices () operable to provide electrical signals indicative of the relative distance and relative speed of the motor vehicle (V) with respect to a fixed or moving obstacle (O) ahead, and a processing and control unit (ECU) connected to such detector devices () as well as to brake actuators () and arranged to cause activation of the brake actuators () to effect automatic emergency braking of the motor vehicle (V) when the relative distance between the motor vehicle (V) and an obstacle (O) ahead lies between a first predetermined limit value (d) equal to the minimum value at which it is still possible to avoid collision by braking and a preselected intermediate value (d) comprised between said first limit value (d) and a second limit value (d) which is less than the said first limit value (d) and is equal to the minimum relative distance value at which it is still possible to follow a path which avoids the obstacle (O), or when the relative distance (d) becomes less than said second limit value (d).

Motor vehicle driving aid system

Growing community of inventors

Turin, Italy

Sebastiano Campo