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Offset compensation for trailer backup assist steering input device

  • US 9,517,794 B2
  • Filed: 07/30/2014
  • Issued: 12/13/2016
  • Est. Priority Date: 04/19/2011
  • Status: Active Grant
First Claim
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1. A trailer backup assist system for a vehicle reversing a trailer, comprising:

  • a knob disposed in the vehicle and having a position indicator, the knob rotatable from a biased position to a number of positions, each position of the knob outputting a signal aligned with the position indicator and indicative of a desired curvature for a backup path of the vehicle and the trailer; and

    a controller configured to;

    determine a signal offset when the knob is returned to the biased position and the signal outputted from the knob is out of alignment with the position indicator;

    apply the signal offset to the outputted signal such that the outputted signal is realigned with the position indicator; and

    generate a steering command for the vehicle to guide the trailer on the desired curvature according to the outputted signal to which the signal offset was applied.

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