Patent ID: 8214124

Claim:
A cruise control system for a vehicle comprising: a resistance estimating unit which estimates a cornering resistance generated when a vehicle turns, based upon vehicle information including at least a steering angle and a vehicle speed acquired at the turning of the vehicle; a target vehicle speed setting unit which sets a target vehicle speed so that a difference between the target vehicle speed and a set vehicle speed set at the time the vehicle travels without turning becomes larger as the cornering resistance estimated by the resistance estimating unit is larger; and a control unit which accelerates and decelerates the vehicle so that a vehicle speed is maintained within a permissible speed range defined based upon the target vehicle speed set by the target vehicle speed setting unit; wherein the target vehicle speed setting unit includes a correction vehicle speed setting unit which sets a correction vehicle speed which becomes larger as the cornering resistance estimated by the resistance estimating unit is larger; and the target vehicle speed setting unit sets the target vehicle speed by subtracting the correction vehicle speed from the set vehicle speed.