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Adaptive cruise control system for vehicle

  • US 20030028311A1
  • Filed: 07/18/2002
  • Published: 02/06/2003
  • Est. Priority Date: 07/31/2001
  • Status: Active Grant
First Claim
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1. An adaptive cruise control (ACC) system for a host-vehicle, comprising:

  • a controller programmed, to detect an inter-vehicle distance between the host-vehicle and a preceding vehicle ahead of the host-vehicle, to detect a host-vehicle speed of the host-vehicle, to calculate a command vehicle speed on the basis of the inter-vehicle distance and the host-vehicle speed to bring the inter-vehicle distance closer to a target inter-vehicle distance, to control one of a driving force and a braking force according to the command vehicle speed, to cancel controlling one of the driving force and the braking force according to the command vehicle speed when the host-vehicle speed is lower than or equal to a control-cancel vehicle speed, and to gradually decrease a deceleration of the host-vehicle according to an approach of the host-vehicle speed toward the control-cancel vehicle speed when the host-vehicle speed becomes lower than or equal to a gradual-deceleration starting vehicle speed during a period of decreasing the host-vehicle speed toward the control-cancel vehicle speed, so that the deceleration takes a value near zero when the host-vehicle speed reaches the control-cancel vehicle speed.

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