Inertial reference for TBA speed limiting
First Claim
1. A method of controlling a vehicle while the vehicle is backing up with a trailer attached to the vehicle, the method comprising:
- utilizing a sensor to determine a trailer yaw rate;
utilizing a sensor to determine a vehicle speed;
determining a ratio of the trailer yaw rate and the vehicle speed;
utilizing a controller to determine a maximum allowable vehicle speed as a function of the ratio of the trailer yaw rate and the vehicle speed utilizing predefined criteria that defines a maximum allowable vehicle speed based on the ratio of the trailer yaw rate and the vehicle speed; and
utilizing a controller to prevent the vehicle from exceeding the maximum allowable vehicle speed.
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Accused Products
Abstract
A method of controlling a vehicle while the vehicle is backing up with a trailer attached thereto. The vehicle may include a brake system and a power train system. The method includes determining a trailer yaw rate, and estimating a modified trailer curvature. The modified trailer curvature comprises a ratio of the trailer yaw rate to the vehicle speed. The method further includes determining a maximum allowable vehicle speed as a function of modified trailer curvature utilizing predefined criteria that defines a maximum allowable vehicle speed for a given modified trailer curvature. The method further includes limiting the vehicle speed such that the maximum allowable vehicle speed is not exceeded.
376 Citations
18 Claims
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1. A method of controlling a vehicle while the vehicle is backing up with a trailer attached to the vehicle, the method comprising:
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utilizing a sensor to determine a trailer yaw rate; utilizing a sensor to determine a vehicle speed; determining a ratio of the trailer yaw rate and the vehicle speed; utilizing a controller to determine a maximum allowable vehicle speed as a function of the ratio of the trailer yaw rate and the vehicle speed utilizing predefined criteria that defines a maximum allowable vehicle speed based on the ratio of the trailer yaw rate and the vehicle speed; and utilizing a controller to prevent the vehicle from exceeding the maximum allowable vehicle speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling a vehicle utilizing a trailer backup assist control system comprising:
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utilizing a controller to calculate a current value of a control parameter by dividing sensor-measured trailer yaw rate by a sensor-measured vehicle speed; utilizing a controller to cause the vehicle to reduce speed if the current value of the control parameter exceeds an allowable limit that is a function of the measured vehicle speed. - View Dependent Claims (11, 12, 13)
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14. A trailer backup assist control system, comprising:
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a sensor configured to provide data concerning vehicle speed in a reverse direction; a sensor configured to provide data concerning at least one of a trailer yaw angle and a trailer yaw rate; a controller that is configured to limit vehicle speed in a reverse direction by controlling at least one of a vehicle brake system and a vehicle powertrain system; wherein the control system determines a ratio of trailer yaw rate to vehicle speed as a control parameter, and limits vehicle speed in a reverse direction when the value of the control parameter exceeds the maximum allowable value for the vehicle speed. - View Dependent Claims (15, 16, 17, 18)
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Specification