Roll over stability control for an automotive vehicle
First Claim
1. A stability control system for an automotive vehicle comprising:
- a speed sensor generating a first signal corresponding to wheel speed of the vehicle;
a lateral acceleration sensor generating a second signal corresponding to lateral acceleration of the vehicle;
a roll rate sensor generating a third signal corresponding to a roll rate of the vehicle;
a yaw rate sensor generating a fourth corresponding to a yaw rate of the vehicle;
a longitudinal acceleration sensor generating a fifth signal corresponding to longitudinal acceleration of the vehicle; and
a controller coupled to said speed sensor, said lateral acceleration sensor, said roll rate sensor, said yaw rate sensor and said longitudinal acceleration sensor, said controller determining a roll angle estimate as a function of lateral acceleration, roll rate, vehicle speed, and yaw rate and longitudinal acceleration, and changing a tire force vector in response to the relative roll angle estimate.
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Accused Products
Abstract
A stability control system 24 for an automotive vehicle as includes a plurality of sensors 28-37 sensing the dynamic conditions of the vehicle and a controller 26 that controls a distributed brake force to reduce a tire moment so the net moment of the vehicle is counter to the roll direction. The sensors include a speed sensor 30, a lateral acceleration sensor 32, a roll rate sensor 34, a yaw rate sensor 20 and a longitudinal acceleration sensor 36. The controller 26 is coupled to the speed sensor 30, the lateral acceleration sensor 32, the roll rate sensor 34, the yaw rate sensor 28 and a longitudinal acceleration sensor 36. The controller 26 determines a roll angle estimate in response to lateral acceleration, longitudinal acceleration, roll rate, vehicle speed, and yaw rate. The controller 26 changes a tire force vector using brake force distribution in response to the relative roll angle estimate.
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Citations
25 Claims
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1. A stability control system for an automotive vehicle comprising:
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a speed sensor generating a first signal corresponding to wheel speed of the vehicle;
a lateral acceleration sensor generating a second signal corresponding to lateral acceleration of the vehicle;
a roll rate sensor generating a third signal corresponding to a roll rate of the vehicle;
a yaw rate sensor generating a fourth corresponding to a yaw rate of the vehicle;
a longitudinal acceleration sensor generating a fifth signal corresponding to longitudinal acceleration of the vehicle; and
a controller coupled to said speed sensor, said lateral acceleration sensor, said roll rate sensor, said yaw rate sensor and said longitudinal acceleration sensor, said controller determining a roll angle estimate as a function of lateral acceleration, roll rate, vehicle speed, and yaw rate and longitudinal acceleration, and changing a tire force vector in response to the relative roll angle estimate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of controlling roll stability of a vehicle comprising:
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determining a yaw rate for the vehicle;
determining a roll rate for the vehicle;
determining a lateral acceleration for the vehicle;
determining a longitudinal acceleration;
determining vehicle speed; and
generating a tire moment in response to yaw rate, roll rate, lateral acceleration, longitudinal acceleration and vehicle speed so that a net moment on the vehicle is counter to a roll direction. - View Dependent Claims (17, 18, 19, 20)
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21. A method of controlling roll stability of a vehicle comprising the steps of:
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determining a roll angle estimate in response to lateral acceleration, longitudinal acceleration, roll rate, vehicle speed, and yaw rate; and
determining a tire force vector in response to the relative roll angle estimate. - View Dependent Claims (22, 23, 24, 25)
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Specification