Auxiliary steering angle control system for vehicle
First Claim
1. An auxiliary steering angle control system for a vehicle, comprising:
- vehicle condition detecting means for detecting a vehicle condition;
desired vehicle motion variable calculating means for calculating a desired value of the vehicle motion variable actually generated to the vehicle from the detected vehicle condition;
actual vehicle motion variable detecting means for detecting an actual vehicle motion variable actually generated in the vehicle;
auxiliary steering angle feedback control-input determining means for determining an auxiliary steering feedback control-input according to the difference between the desired motion variable and the detected actual vehicle motion variable;
road condition detecting means for detecting a road variable indicative of a condition of a road on which the vehicle is traveling; and
auxiliary steering feedback control-input correcting means for reducing the auxiliary steering angle feedback control-input when said road condition detecting means outputs a signal indicative that the vehicle is traveling on a bad-conditioned road.
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Accused Products
Abstract
An auxiliary steering angle control system for a vehicle comprises a vehicle condition detecting section for detecting a vehicle condition, a desired motion variable calculating section for calculating a desired value of the motion variable actually generated to the vehicle from the detected vehicle condition, an actual motion variable detecting section for detecting an actual motion variable actually generated in the vehicle, an auxiliary steering angle feedback control-input determining section for determining an auxiliary steering feedback control-input according to the difference between the desired motion variable and the detected actual-vehicle motion variable, a road condition detecting section for detecting a road variable indicative of a condition of a road on which the vehicle is traveling, and an auxiliary steering feedback control-input correcting section for reducing the auxiliary steering angle feedback control-input when the road condition detecting section outputs a signal indicative that the vehicle is traveling on a bad-conditioned road.
27 Citations
10 Claims
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1. An auxiliary steering angle control system for a vehicle, comprising:
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vehicle condition detecting means for detecting a vehicle condition; desired vehicle motion variable calculating means for calculating a desired value of the vehicle motion variable actually generated to the vehicle from the detected vehicle condition; actual vehicle motion variable detecting means for detecting an actual vehicle motion variable actually generated in the vehicle; auxiliary steering angle feedback control-input determining means for determining an auxiliary steering feedback control-input according to the difference between the desired motion variable and the detected actual vehicle motion variable; road condition detecting means for detecting a road variable indicative of a condition of a road on which the vehicle is traveling; and auxiliary steering feedback control-input correcting means for reducing the auxiliary steering angle feedback control-input when said road condition detecting means outputs a signal indicative that the vehicle is traveling on a bad-conditioned road. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A road-condition evaluating apparatus for a vehicle control system, comprising:
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a yaw rate sensor detecting a yaw rate generated in a vehicle during a traveling and outputting a signal indicative of the yaw rate; a filter extracting as high-frequency component from the signal from the yaw rate sensor; and a processor calculating a road variable indicative of a road condition by using a predetermined equation and a value indicative of the high-frequency component obtained in said filter.
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9. An auxiliary steering angle control system for steering a pair of rear wheels for a four wheel steered vehicle, said auxiliary steering angle control system comprising:
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vehicle condition detecting means for detecting a vehicle condition and generating a vehicle motion variable; desired vehicle motion variable calculating means for calculating a desired value of the vehicle motion variable actually generated to the vehicle from the detected vehicle condition; actual vehicle motion variable detecting means for detecting an actual vehicle motion variable actually generated in the vehicle; auxiliary steering angle feedback control-input determining means for determining an auxiliary steering angle feedback control-input according to a difference between the desired value of the vehicle motion variable and the detected actual vehicle motion variable; road condition detecting means for detecting a road variable indicative of a condition of a road on which the vehicle is traveling; and auxiliary steering feedback control-input correcting means for reducing the auxiliary steering angle feed back control-input when said road condition detecting means outputs a signal indicative that the vehicle is traveling on a bad-conditioned road.
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10. An auxiliary steering angle control system for steering a pair of rear wheels for a four wheel steered vehicle, said auxiliary steering angle control system comprising:
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vehicle condition detecting means for detecting a vehicle condition and generating a vehicle motion variable; desired vehicle motion variable calculating means for calculating a desired value of the vehicle motion variable actually generated to the vehicle from the detected vehicle condition; actual vehicle motion variable detecting means for detecting an actual vehicle motion variable actually generated in the vehicle; auxiliary steering angle feedback control-input determining means for determining an auxiliary steering angle feedback control-input according to a difference between the desired value of the vehicle motion variable and the detected actual vehicle motion variable; road condition detecting means for detecting a road variable indicative of a condition of a road on which the vehicle is traveling, said road condition detecting means including; a yaw rate sensor for detecting a yaw rate generated in the vehicle during traveling and outputting a signal indicative of the yaw rate, a filter for extracting a high-frequency component from the signal outputted from the yaw rate sensor, and a processor which calculates a road variable indicative of a road condition by using a predetermined equation and a value indicative of the high-frequency component extracted by said filter; and auxiliary steering feedback control-input correcting means for reducing the auxiliary steering angle feed back control-input when said road condition detecting means outputs a signal indicative that the vehicle is traveling on a bad-conditioned road.
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Specification