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Vehicle speed control system and program

  • US 6,970,779 B2
  • Filed: 11/06/2003
  • Issued: 11/29/2005
  • Est. Priority Date: 11/25/2002
  • Status: Active Grant
First Claim
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1. A vehicle speed control system comprising:

  • position detecting means for detecting a position of a vehicle;

    map information storing means for storing map information containing node information;

    pass target node detecting means for detecting one or more pass target nodes over which the vehicle is going to pass, on the basis of the position of the vehicle and the map information;

    stable running speed calculating means for calculating a stable running speed at which the vehicle runs safely when the vehicle passes over each of the pass target nodes;

    vehicle speed detecting means for detecting a current speed of the vehicle;

    decelerating means for decelerating the vehicle;

    control means for controlling the decelerating means;

    deceleration calculating means for calculating, on the basis of the position of the vehicle, the pass target nodes, the stable running speed at each of the pass target nodes and the current speed of the vehicle, a deceleration at which the vehicle is decelerated by the control means so that the speed of the vehicle is reduced from the current speed to the stable running speed at the pass target node; and

    deceleration target point setting means for selecting a node providing a highest deceleration from the pass target nodes on the basis of the deceleration calculated by the deceleration calculating means, setting a maximum deceleration node to a primary deceleration target point when first deceleration control is carried out after the selection of the maximum deceleration node, selecting from the pass target nodes a deceleration end node which is far away from the maximum deceleration node and at which variation of the stable running speed is inverted from reduction to increase, and setting the deceleration end node to a secondary deceleration target point when second deceleration control is carried out after the selection of the maximum deceleration node.

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