Abstract
Firstly, this paper studies a Direct Yaw Control (DYC) to reduce spin tendency. To reduce load rate of rear tires, a DYC control law to zero cornering force of rear wheels is formulated. Further vehicle response with this control is obtained. This vehicle response is first order delay system. Its time constant value is similar to the time constant with active rear steer control to zero vehicle slip angle at C.G. Since to zero cornering force of rear wheels is equivalent to zero vehicle slip angle at rear wheels, the relation of the position whose vehicle slip angle is zeroed and vehicles behavior is also considered.