Vehicle lane keep assist system

  • US 9,340,227 B2
  • Filed: 08/12/2013
  • Issued: 05/17/2016
  • Est. Priority Date: 08/14/2012
  • Status: Active Grant
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First Claim
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1. A lane keep assist system for a vehicle, said lane keep assist system comprising:

  • a forward facing camera disposed at a vehicle and having a forward field of view exterior of the vehicle;

    an image processor operable to process image data captured by said forward facing camera;

    wherein said lane keep assist system is operable to process image data to determine lane markers in said field of view and to determine at least one time to lane crossing value;

    wherein said lane keep assist system is operable to determine a first time to lane crossing value via a first algorithm and a second time to lane crossing value via a second algorithm;

    wherein said first algorithm determines the first time to lane crossing value responsive to image processing of captured image data by said image processor;

    wherein said second algorithm determines the second time to lane crossing value responsive to signals from at least one other vehicle sensor;

    wherein said lane keep assist system is operable to apply a steering signal to adjust the steering of the vehicle at least in part responsive to the determined first and second time to lane crossing values; and

    wherein said lane keep assist system is operable to at least one of (i) combine said first and second time to lane crossing values to provide a more accurate estimation of the time to lane crossing and (ii) average said first and second time to lane crossing values to provide a more accurate estimation of the time to lane crossing.

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