US Patent 7357400 Suspension device for vehicle wheels

A vehicle suspension device includes a camber mechanism which imparts to the wheels a degree of freedom of the camber independently of vehicle rolls. The wheels are linked to the suspension elements so that the camber movement of each wheel permits, around a mean position of the wheel, an instantaneous centre of rotation (CIR r/s). A camber connection structure transmits the camber movements of one wheel to another wheel. The instantaneous position of the instantaneous centre of rotation within the camber plane for a zero camber of a wheel satisfies the following condition: Z≦(0.75)Y−(0.12158)R, wherein Z and Y are the ordinate and abscissa, respectively, of the instantaneous position, and R is the wheel radius.