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Application of active control technology to an automobile has been considered to be effective to drastic improvement in vehicle dynamics (1,2,3,4)*. This paper studies maneuvability and stability of vehicles with active-controlled suspension and four wheel steering system. System construction and effects of the active control are also described.

Demands for Faster, safer, and more comfortable mobility under various road, weather and/or driving conditions have led to advanced engineering Features, such as 4WD, 4WS, and ABS. However, simple combination of these advanced components tend to induce the deterioration of the vehicle performance under certain conditions due to the interference among the related functions. This paper describes these conflicting areas and proposes newly developed integrated system in an effort to achieve the compatibility of each function among 4WD, 4 independent suspensions, 4WS, and ABS. The integrated system of these advanced engineering features has resulted safer and faster mobility in reasonably higher cost efficiency by the sophisticated system construction.