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Automatic vehicular velocity control apparatus for automotive vehicle

  • US 6,473,686 B2
  • Filed: 11/16/2001
  • Issued: 10/29/2002
  • Est. Priority Date: 08/26/1998
  • Status: Expired due to Term
First Claim
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1. An automatic vehicular velocity control apparatus for an automotive vehicle, comprising:

  • an inter-vehicle distance detector to detect an inter-vehicle distance from the vehicle to a preceding vehicle which is running ahead of the vehicle;

    a vehicular velocity detector to detect a vehicular velocity of the vehicle;

    a relative velocity detector to detect a relative velocity of the preceding vehicle to the vehicle;

    an inter-vehicle distance command value calculator to calculate a command value of an inter-vehicle distance;

    a target value determinator to determine a target value of the inter-vehicle distance prescribing a variation of the inter-vehicle distance with time until the detected value of the inter-vehicle distance has reached to the command value of the inter-vehicle distance;

    a gain determinator to determine a first gain by which a deviation between the target value of the inter-vehicle distance and the detected value of the inter-vehicle distance is multiplied in accordance with the detected value of the relative velocity;

    a vehicular velocity command value calculator to calculate a command value of the vehicular velocity to make the detected value of the inter-vehicle distance equal to the target value of the inter-vehicle distance on the basis of the detected value of the vehicular velocity, the detected value of the relative velocity, and the deviation between the target value of the inter-vehicle distance and the detected value thereof; and

    a vehicular velocity control section to control at least one of a driving force of the vehicle, a braking force of the vehicle, and a gear ratio of a vehicular transmission in such a manner that the detected value of the vehicular velocity is made equal to the command value thereof.

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