Speed limiting comfort enhancement
First Claim
Patent Images
1. A vehicle, comprising:
- a speed detector detecting a vehicle speed;
a brake system;
a control system;
implementing a control mode including determining a threshold speed;
deriving an initial brake torque demand based on an error between the threshold speed and a vehicle speed exceeding the threshold speed; and
outputting to the brake system a rate-limited brake torque demand that increases at a rate based on the error from zero to the initial brake torque demand.
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Abstract
A vehicle includes a speed detector detecting a vehicle speed, a brake system and a control system implementing a control mode including determining a threshold speed. The control system further derives an initial brake torque demand proportional to an error between the threshold speed and a vehicle speed exceeding the threshold speed and outputs to the brake system a rate-limited brake torque demand by applying a rate-limit operator based on the error to the initial brake torque demand.
162 Citations
20 Claims
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1. A vehicle, comprising:
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a speed detector detecting a vehicle speed; a brake system; a control system; implementing a control mode including determining a threshold speed; deriving an initial brake torque demand based on an error between the threshold speed and a vehicle speed exceeding the threshold speed; and outputting to the brake system a rate-limited brake torque demand that increases at a rate based on the error from zero to the initial brake torque demand. - 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 articulably coupled with the vehicle, comprising:
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a vehicle steering module; a vehicle brake module; a speed detector detecting a vehicle speed; and a controller; outputting a steering command to the vehicle steering module to maintain the trailer along a commanded path; and determining an excess speed error based on a detected vehicle speed and a calculated threshold speed and outputting to the vehicle brake module a torque demand that increases at a rate based on the error from zero to a maximum demand also proportional to the error. - View Dependent Claims (12, 13, 14, 15)
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16. A method for assisting reversing of a vehicle with a trailer articulably coupled therewith, comprising:
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controlling a vehicle steering system to maintain the trailer along a commanded path; determining an excess speed error based on a detected vehicle speed and a threshold speed calculated based on the commanded path; and controlling a vehicle brake system according to a torque demand that increases at a rate based on the error from zero to a maximum demand also proportional to the error. - View Dependent Claims (17, 18, 19, 20)
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Specification