Vehicle speed control system

Abstract

A vehicle speed control system includes: a unit for computing a first target velocity based on map information; a unit for computing a second target velocity based on a road profile obtained from other information than the map information (such as lane recognition using a camera); a unit for comparing the first target velocity and the second target velocity; a unit for selecting a lower target velocity therefrom; and a unit for controlling a vehicle velocity in accordance with the selected target velocity.

1 . A vehicle speed control system comprising:
 a first distance information acquisition part for acquiring first distance information from a current position to a specific point based on map information;   a second distance information acquisition part for acquiring second distance information from the current position to the specific point based on a road profile obtained from other information than the map information; and   a velocity control part for
 comparing the first distance information and the second distance information, 
 selecting shorter distance information therefrom for decelerating a vehicle velocity or selecting longer distance information therefrom for accelerating a vehicle velocity, 
 computing a target velocity based on the selected distance information and 
 controlling the vehicle velocity in accordance with the computed target velocity. 
   
     
     
         2 . The vehicle speed control system according to  claim 1 , wherein the specific point is at least one point selected from a curve entrance point, a curve exit point, a stop line, a toll gate and an intersection. 
     
     
         3 . The vehicle speed control system according to  claim 1 , wherein the velocity control part sets the target velocity so as not to generate a sudden change in a transition of acceleration/deceleration, when computing the target velocity.