Enhanced yaw rate trailer angle detection initialization
First Claim
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1. A vehicle including a trailer backup assist system, the vehicle comprising:
- an authentication device that permits vehicle operation if the authentication device is actuated to an ON state from an OFF state;
a sensor that is configured to provide a signal indicating whether or not a trailer is attached to the vehicle;
a controller configured to;
store trailer data, a vehicle position and hitch angle if the authentication device changes from an ON state to an OFF state to define a power off event;
determine whether the authentication device has changed from an OFF state to an ON state to define a power on event;
determine whether a trailer is connected to the vehicle when a power on event occurs;
if a trailer is connected to the vehicle when a power on event occurs, determine whether a present position of the vehicle has changed since a power off event;
if a present position of the vehicle has not changed since a power off event, and if a trailer is connected to the vehicle when a power on event occurs, retrieve at least one of trailer data and hitch angle for use in the trailer backup assist system;
if a present position of the vehicle has changed since a power off event, and if a trailer is connected to the vehicle when a power on event occurs, provide an indication to a user that trailer data needs to be supplied to the trailer backup assist system.
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Abstract
A trailer backup assist system for a vehicle reversing a trailer includes a sensor module adapted to attach to the trailer and generate a trailer yaw rate or a trailer speed. The trailer backup assist system also includes a vehicle sensor system that generates a vehicle yaw rate and a vehicle speed. Further, the trailer backup assist system includes a controller that estimates a hitch angle based on the trailer yaw rate or the trailer speed and the vehicle yaw rate and the vehicle speed in view of a kinematic relationship between the trailer and the vehicle.
400 Citations
19 Claims
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1. A vehicle including a trailer backup assist system, the vehicle comprising:
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an authentication device that permits vehicle operation if the authentication device is actuated to an ON state from an OFF state; a sensor that is configured to provide a signal indicating whether or not a trailer is attached to the vehicle; a controller configured to; store trailer data, a vehicle position and hitch angle if the authentication device changes from an ON state to an OFF state to define a power off event; determine whether the authentication device has changed from an OFF state to an ON state to define a power on event; determine whether a trailer is connected to the vehicle when a power on event occurs; if a trailer is connected to the vehicle when a power on event occurs, determine whether a present position of the vehicle has changed since a power off event; if a present position of the vehicle has not changed since a power off event, and if a trailer is connected to the vehicle when a power on event occurs, retrieve at least one of trailer data and hitch angle for use in the trailer backup assist system; if a present position of the vehicle has changed since a power off event, and if a trailer is connected to the vehicle when a power on event occurs, provide an indication to a user that trailer data needs to be supplied to the trailer backup assist system. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11)
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3. A vehicle including a trailer backup assist system, the vehicle comprising:
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an authentication device that permits vehicle operation if the authentication device is actuated to an ON state from an OFF state; a sensor that is configured to provide a signal indicating whether or not a trailer is attached to the vehicle; a controller configured to; store trailer data, a vehicle position and hitch angle if the authentication device changes from an ON state to an OFF state to define a power off event; determine whether the authentication device has changed from an OFF state to an ON state to define a power on event; determine whether a trailer is connected to the vehicle when a power on event occurs; determine whether a present position of the vehicle has changed since a power off event; if a present position of the vehicle has not changed since a power off event, retrieve at least one of trailer data and hitch angle for use in the trailer backup assist system; if a present position of the vehicle has changed since a power off event, provide an indication to a user that trailer data needs to be supplied to the trailer backup assist system; and receive a desired curvature from a steering input device while the vehicle is moving in reverse; utilize a curvature routine to generate a steering command while the vehicle is moving in reverse; guide a trailer on the desired curvature while the vehicle is moving in reverse and; wherein the trailer data comprises a trailer dimension.
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12. A vehicle, comprising:
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a trailer backup assist system having a controller configured to; estimate a hitch angle using yaw rate data; store information including a trailer dimension, vehicle position, trailer connected flag, and hitch angle in non-volatile memory, retrieve the information; and utilize the retrieved information for trailer backup assist control only if the vehicle has not moved and if the retrieved trailer connected flag and a current trailer connected flag are both true. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification