Roll over stability control for an automotive vehicle having rear wheel steering
First Claim
1. A stability control system for an automotive vehicle having a front steering system and a rear steering system comprising:
- a rear wheel steering actuator;
a rear wheel position sensor generating a rear 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 rear wheel steering sensor, said rollover sensor, and said rear wheel steering actuator, said controller generating a rear wheel steering actuator signal in response to said rollover signal, said rear wheel steering actuator signal controlling said rear steering actuator to prevent the vehicle from rolling over.
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0 Petitions
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
21 Claims
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1. A stability control system for an automotive vehicle having a front steering system and a rear steering system comprising:
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a rear wheel steering actuator;
a rear wheel position sensor generating a rear 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 rear wheel steering sensor, said rollover sensor, and said rear wheel steering actuator, said controller generating a rear wheel steering actuator signal in response to said rollover signal, said rear wheel steering actuator signal controlling said rear steering actuator to prevent the vehicle from rolling over. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 16)
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11. A method of controlling roll stability of a vehicle rear wheel steering actuator comprising:
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sensing the position of the rear wheel steering actuator;
sensing an impending rollover; and
generating a tire moment counter to a roll direction by controlling the rear wheel steering actuator in response to said impending rollover and said position of the rear wheel steering actuator. - View Dependent Claims (12, 13, 17, 18, 19, 20, 21)
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14. A method of controlling roll stability of a vehicle having a rear steering system comprising the steps of:
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determining a roll angle estimate in response to a rollover sensor; and
controlling a rear steering actuator to change a tire force vector in response to the relative roll angle estimate.
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Specification