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Driver assistance system for vehicle

  • US 10,343,718 B2
  • Filed: 12/12/2017
  • Issued: 07/09/2019
  • Est. Priority Date: 01/13/2017
  • Status: Active Grant
First Claim
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1. A driver assistance system for a vehicle,the vehicle including an electric power steering device equipped with an electric motor that is driven to control a steering angle of a wheel, wherein the driver assistance system comprises:

  • an electronic control unit configured to act as;

    an automated steering control section that performs automated steering control by controlling the electric motor so as to generate a steering torque for causing an actual steering angle of the wheel to approach a target steering angle; and

    a steering angle return control section that performs steering angle return control by controlling controls the electric motor so as to generate a return torque for returning the actual steering angle of the wheel to a neutral point in response to a steering operation by a driver being ended during non-execution of the automated steering control, andwherein, in a condition where a first angle difference between the actual steering angle of the wheel and the target steering angle in the automated steering control is equal to a second angle difference between the actual steering angle of the wheel and the neutral point in the steering angle return control, the driver assistance system is configured, in reverting to the automated steering control after a steering intervention of the driver is performed during execution of the automated steering control and causing the actual steering angle of the wheel to approach the target steering angle, to change the actual steering angle of the wheel with a change rate that is lower than a change rate in returning the actual steering angle of the wheel to the neutral point during execution of the steering angle return control.

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