A suspension system for a vehicle, including (a) four displacement force generators (152) each configured to generate a displacement force forcing sprung and unsprung portions of the vehicle toward or away from each other; and (b) a control unit (200) configured to control the displacement force that...http://www.google.es/patents/US8116939?utm_source=gb-gplus-sharePatente US8116939 - Suspension system for vehicle