Trailer backup assist input with two-stage spring rate
First Claim
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1. A steering input apparatus for a trailer backup assist system, comprising:
- a user-input control element;
moveable away from a center position sequentially through a first range and a second range of directional positions; and
biased toward the center position at a first rate through the first range and at a second, greater rate through the second range; and
a controller generating a vehicle steering command based on an instantaneous position of the control element.
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Abstract
A steering input apparatus for a trailer backup assist system includes a control element moveable away from a center position sequentially through a first range and a second range of directional positions and biased toward the center position at a first rate through the first range and at a second, greater rate through the second range. The apparatus further includes a control module generating a vehicle steering command based on an instantaneous position of the control element.
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Citations
20 Claims
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1. A steering input apparatus for a trailer backup assist system, comprising:
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a user-input control element; moveable away from a center position sequentially through a first range and a second range of directional positions; and biased toward the center position at a first rate through the first range and at a second, greater rate through the second range; and a controller generating a vehicle steering command based on an instantaneous position of the control element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A backup assist system for a vehicle reversing a trailer, comprising:
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a user-input control knob; rotatable away from a center position sequentially through a first range and a second range of directional positions; and biased toward the center position at a first rate through the first range and at a second, greater rate through the second range; and a controller generating a vehicle steering command based on an instantaneous position of the control knob. - View Dependent Claims (12, 13, 14, 15)
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16. A method for assisting in reversing a vehicle-trailer combination, comprising:
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determining a range of steerable curvature commands for the vehicle-trailer combination; estimating a range of recovery distances corresponding with the range of steerable curvature commands; separating the range of recovery distances respectively into first and second sub-ranges below and above a recovery period threshold; and respectively allocating the first and second sub-ranges to first and second ranges of sequential movement of a user-input control element, wherein the control element is moveable away from a center position sequentially through the first range and the second range of sequential movement and is biased toward the center position at a first rate through the first range and at a second, greater rate through the second range. - View Dependent Claims (17, 18, 19, 20)
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Specification