VEHICLE STABILITY CONTROL SYSTEM AND METHOD
First Claim
1. A vehicle stability control system, comprising:
- a 5-sensor cluster;
a stability controller configured to communicate with the 5-sensor cluster and receive signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, and a pitch rate from the 5-sensor cluster, the stability controller also configured to determine a braking amount or a throttle amount to maintain vehicle stability;
a brake controller configured to communicate with the stability controller and receive a braking request from the stability controller; and
a throttle controller configured to communicate with the stability controller and receive a throttle request from the stability controller.
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Abstract
A vehicle stability control system comprises a 5-sensor cluster and a stability controller configured to communicate with the 5-sensor cluster and receive signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, and a pitch rate from the 5-sensor cluster. The stability controller can also be configured to determine a braking amount or a throttle amount to maintain vehicle stability. The system also comprises a brake controller configured to communicate with the stability controller and receive a braking request from the stability controller, and a throttle controller configured to communicate with the stability controller and receive a throttle request from the stability controller. The system may also comprise a braking or throttling command computed based on various scenarios detected by measured and calculated signals.
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Citations
27 Claims
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1. A vehicle stability control system, comprising:
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a 5-sensor cluster; a stability controller configured to communicate with the 5-sensor cluster and receive signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, and a pitch rate from the 5-sensor cluster, the stability controller also configured to determine a braking amount or a throttle amount to maintain vehicle stability; a brake controller configured to communicate with the stability controller and receive a braking request from the stability controller; and a throttle controller configured to communicate with the stability controller and receive a throttle request from the stability controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 21)
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9-13. -13. (canceled)
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14. A method for maintaining a driver'"'"'s intended speed of a vehicle during hill driving, the method comprising:
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receiving signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, and a pitch rate; calculating a vehicle pitch angle from the lateral acceleration, the longitudinal acceleration, the yaw rate, the roll rate, and the pitch rate; calculating a longitudinal velocity gradient from the vehicle pitch angle; determining whether the longitudinal velocity gradient is substantially close to zero; and changing a throttle input of the vehicle to change the vehicle'"'"'s velocity if the longitudinal velocity gradient is not substantially close to zero. - View Dependent Claims (15, 16)
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17. A method for maintaining a constant speed for a vehicle, the method comprising:
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receiving signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, and a pitch rate; calculating a vehicle pitch angle from the lateral acceleration, the longitudinal acceleration, the yaw rate, the roll rate, and the pitch rate; calculating a longitudinal velocity gradient from the vehicle pitch angle; and maintaining the longitudinal velocity substantially at zero. - View Dependent Claims (18, 19, 20)
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22. A method for detecting a vehicle sliding into loss of control, the method comprising:
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receiving signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, and a pitch rate; calculating a vehicle pitch angle from the lateral acceleration, the longitudinal acceleration, the yaw rate, the roll rate, and the pitch rate; calculating a longitudinal velocity gradient from the vehicle pitch angle; calculating a signed longitudinal velocity based on the longitudinal velocity gradient; calculating a sideslip angle; comparing the magnitude of the sideslip angle with a first threshold indicative of the vehicle'"'"'s motion trend; comparing the magnitude of the longitudinal velocity gradient with a second threshold indicative of lateral motion of the vehicle; and detecting loss of control of the vehicle based on the comparison of the magnitude of the sideslip angle with the first threshold indicative of the vehicle'"'"'s motion trend and the comparison of the magnitude of the longitudinal velocity gradient with a second threshold indicative of lateral motion of the vehicle. - View Dependent Claims (24, 25)
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23. A vehicle stability control system for controlling a vehicle'"'"'s sliding into loss of control, the system comprising:
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detecting the vehicle'"'"'s sliding into loss of control by comparing the vehicle'"'"'s longitudinal velocity gradient with a reference speed computed from wheel speed sensors inputs; detecting a lateral velocity of the vehicle and a longitudinal velocity of the vehicle when vehicle sliding is detected; calculating a sliding velocity vector of the vehicle from the lateral velocity of the vehicle and the longitudinal velocity of the vehicle; and braking the vehicle such that tire forces of the vehicle are aligned in a direction opposite the vehicle sliding velocity vector to remove a sliding energy of the vehicle. - View Dependent Claims (26, 27)
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Specification