Patent ID: 7096109

Claim:
An adaptive cruise control system, comprising: a vehicle speed control amount calculating unit for calculating a vehicle speed control amount according to a driver set speed set in advance by a driver via a pedal and a vehicle speed of the vehicle, to equalize the vehicle speed of the vehicle to the driver set speed; a control unit for controlling an accelerating unit and a decelerating unit according to the vehicle speed control amount; a measuring unit for measuring a following distance for the vehicle to follow a target vehicle and a relative speed of the vehicle with respect to the target vehicle; a target following distance calculating unit for calculating a target following distance according to the following distance and the relative speed of the vehicle with respect to the target vehicle and the vehicle speed of the vehicle, wherein the target following distance differs as between periods when the pedal is depressed and periods when it is not depressed; a following distance control amount calculating unit for calculating a following distance control amount to equalize the following distance to the target following distance; and a control unit for controlling an accelerating unit and a decelerating unit to accelerate or to decelerate the vehicle speed of the vehicle according to the vehicle speed control amount, wherein the driver set speed is changed according to displacement of the pedal, acceleration or deceleration of the vehicle is controlled according to the following distance control amount when a target vehicle is sensed, and acceleration or deceleration of the vehicle is controlled according to the vehicle speed control amount when a target vehicle is not sensed.