Rollover stability control for an automotive vehicle using front wheel actuators
First Claim
1. A stability control system for an automotive vehicle having a front steering system comprising:
- a front right wheel actuator; and
a front left wheel actuator;
a front right wheel position sensor generating a front right position signal and a front left wheel position sensor generating a front left wheel position signal;
a rollover sensor for producing a rollover signal in response to an impending rollover of the vehicle; and
a controller coupled to said front right wheel position sensor, said front left wheel position sensor, said rollover sensor, said front right wheel actuator and said front left wheel actuator, said controller generating a front right wheel actuator signal and a front left wheel actuator signal in response to said rollover signal, said front right wheel actuator signal and said front left wheel actuator signal controlling said respective front left and front right steering actuator to prevent the vehicle from rolling over.
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Accused Products
Abstract
A stability control system (24) for an automotive vehicle as includes a plurality of sensors (28-39) sensing the dynamic conditions of the vehicle and a controller controls a steering force to reduce a tire moment so the net moment of the vehicle is counter to the roll direction. The sensors may 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 by changing the direction and/or force of the steering actuator in response to the relative roll angle estimate.
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Citations
15 Claims
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1. A stability control system for an automotive vehicle having a front steering system comprising:
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a front right wheel actuator; and
a front left wheel actuator;
a front right wheel position sensor generating a front right position signal and a front left wheel position sensor generating a front left wheel position signal;
a rollover sensor for producing a rollover signal in response to an impending rollover of the vehicle; and
a controller coupled to said front right wheel position sensor, said front left wheel position sensor, said rollover sensor, said front right wheel actuator and said front left wheel actuator, said controller generating a front right wheel actuator signal and a front left wheel actuator signal in response to said rollover signal, said front right wheel actuator signal and said front left wheel actuator signal controlling said respective front left and front right steering actuator to prevent the vehicle from rolling over. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling roll stability of a vehicle front steering actuator comprising:
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sensing the position of the front steering actuator;
sensing an impending rollover;
generating a tire moment counter to a roll direction by controlling the front actuator in response to said impending rollover and said position of the front steering actuator. - View Dependent Claims (10, 11, 13, 14, 15)
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12. A method of controlling roll stability of a vehicle having a front steering system having independently actuable front steering actuator comprising the steps of:
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determining a roll angle estimate in response to a rollover sensor; and
controlling at least one of the front steering actuators to determining a tire force vector in response to the relative roll angle estimate.
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Specification