Patent ID: 8195371

Claim:
A motion control device for a vehicle, comprising: a vehicle speed obtaining means for obtaining a speed of the vehicle; a curve shape obtaining means for obtaining a shape of a curve existing ahead of the vehicle on a road on which the vehicle is traveling; a position obtaining means for obtaining a relative position of the vehicle to the curve; a determining means for determining an appropriate vehicle speed for the vehicle to travel through the curve based on the shape of the curve obtained by the curve shape obtaining means; a speed reduction controlling means for performing a speed reduction control on the vehicle based on the appropriate vehicle speed determined by the determining means; wherein the determining means determines, on the basis of the shape of the curve, a reference point in the middle of the curve and the appropriate vehicle speed for the vehicle to pass over the reference point, and the device further comprising: a calculating means for calculating, on the basis of the reference point and the appropriate vehicle speed, a target vehicle speed characteristic which is a target of a reduction characteristic of the vehicle speed relative to a position on the road in a case where the vehicle is decelerated on the road between the reference point and a point closer to the vehicle relative to the reference point, wherein the speed reduction controlling means starts the speed reduction control for decelerating the vehicle in a case where a relationship between the vehicle speed and a position of the vehicle relative to the reference point obtained from the relative position meets a control start condition determined on the basis of the target vehicle speed characteristic and finishes the speed reduction control in a case where the vehicle speed falls within a predetermined range in which the appropriate vehicle speed is included.