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Autonomous vehicle emergency braking method

  • US 9,428,163 B2
  • Filed: 05/03/2010
  • Issued: 08/30/2016
  • Est. Priority Date: 07/09/2009
  • Status: Active Grant
First Claim
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1. A method for autonomous emergency braking in a road vehicle, the method comprising the steps of:

  • determining a roadway sped of the vehicle based on wheel speeds measured using wheel sensors of the vehicle;

    detecting, using a collision mitigation electronic system, a potential hazard to the vehicle;

    effecting, by the collision mitigation electronic system, autonomous emergency braking of the vehicle in response to the detected hazard; and

    during the autonomous emergency braking of the vehicle;

    monitoring the space in front of the vehicle using at least one distance sensor of the vehicle;

    determining, using the collision mitigation electronic system, the roadway speed of the vehicle independently of the wheel speeds measured using the wheel sensors by evaluating signals of the at least one distance sensor; and

    controlling the autonomous emergency braking of the vehicle by operating the collision mitigation electronic system based at least in part on the roadway speed of the vehicle determined by evaluating the signals of the at least one distance sensor to avoid incorrect evaluation of the detected hazard and premature termination of the autonomous emergency braking that might otherwise occur if the collision mitigation electronic system were operated exclusively based on the roadway speed determined based on the wheel speeds measured using the wheel sensors.

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