×

Vehicle control system

  • US 20080059037A1
  • Filed: 08/30/2007
  • Published: 03/06/2008
  • Est. Priority Date: 09/04/2006
  • Status: Active Grant
First Claim
Patent Images

1. A vehicle control system comprising:

  • a distance acquisition unit for acquiring a distance between a controlled vehicle and an appurtenance object appurtenant to a road which is located on an imaginary line extending from the controlled vehicle in a traveling direction thereof and which is provided at a boundary of a curving road existing in front of the controlled vehicle or in a neighborhood of the boundary;

    an evaluation index calculation unit for calculating an evaluation index as an index representing a state of decrease or increase in the distance of the controlled vehicle to the appurtenance object, the index increasing with a relative speed at which the vehicle approaches the appurtenance object and becoming larger in a rate of increase at each relative speed as the distance to the appurtenance object becomes smaller;

    a lateral acceleration acquisition unit for acquiring lateral acceleration occurring in a direction lateral to the controlled vehicle when the controlled vehicle is traveling on the curving road;

    a radius of curvature acquisition unit for acquiring a radius of curvature of the curving road;

    a target speed setting unit for setting a target speed at which the controlled vehicle is to travel on the curving road based on the lateral acceleration and the radius of curvature of the curving road;

    a speed acquisition unit for acquiring a speed of the controlled vehicle;

    a target acceleration/deceleration calculation unit for calculating a target acceleration or deceleration rate at which the controlled vehicle is to be accelerated or decelerated to reach the target speed based on the evaluation index, the distance between the appurtenance object and the controlled vehicle, the speed of the controlled vehicle, and the target speed; and

    a vehicle control unit for controlling acceleration or deceleration such that acceleration or deceleration occurring at the controlled vehicle equals the target acceleration or deceleration based on a result of comparison between the speed of the controlled vehicle and the target speed.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×