Patent ID: 8321089

Claim:
A vehicle motion control device, comprising: a basic means for determining a target slip ratio based on a predetermined relation between a slip ratio of a wheel of a vehicle and a physical quantity representing a state of motion of the vehicle in a direction of lateral overturn of the vehicle and also for controlling an actual slip ratio so that the actual slip ratio becomes equal to the target slip ratio, the actual slip ratio being a slip ratio actually generated at the wheel of the vehicle; a motion state obtaining means for obtaining, once per a predetermined calculation period, the physical quantity representing the state of the motion of the vehicle in the direction of the lateral overturn; and a mode setting means for being in an anti-lateral overturn mode when the physical quantity obtained by the motion state obtaining means is larger than or equal to a motion state threshold, the anti-lateral overturn mode being for suppressing the lateral overturn of the vehicle; wherein the basic means includes a target slip ratio setting means for determining, when the vehicle motion control device is in the anti-lateral overturn mode, the target slip ratio at a present calculation period based on a largest value of the slip ratio corresponding to the physical quantity obtained during a time range, the time range being between the present calculation period and a past time instance when the vehicle motion control device was in the anti-lateral overturn mode.