STEERING APPARATUS AND STEERING ASSIST METHOD
First Claim
1. A steering apparatus comprising:
- a steering angle sensor that acquires a detected value of a steering angle of a steering wheel as a steering angle detection value;
a motor that generates steering assist torque assisting steering; and
a controller that controls an output from the motor using a steering angle control value calculated on the basis of the steering angle detection value,wherein, when a vehicle travels through a first curve and a second curve which are different in cornering direction and which are sequentially provided, the controller determines whether the steering wheel is returned and the steering assist torque is decreased to a torque threshold value while the vehicle is running in the first curve, and if so, shifts the steering angle control value with respect to the steering angle detection value and starts the generation of the steering assist torque for the second curve before the steering angle detection value returns to a sensor median due to returning of the steering wheel.
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Accused Products
Abstract
A steering apparatus and a steering assist method are capable of being preferably used for a first curve and a second carve which are different in cornering direction and which are sequentially provided. When a vehicle travels through the first curve and the second curve, a controller in the steering apparatus shifts a steering angle control value with respect to a steering angle detection value in response to returning of a steering wheel and decrease of steering assist torque to a torque threshold value while the vehicle is running in the first curve and starts generation of the steering assist torque for the second curve before the steering angle detection value returns to a sensor median due to returning of the steering wheel.
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Citations
16 Claims
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1. A steering apparatus comprising:
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a steering angle sensor that acquires a detected value of a steering angle of a steering wheel as a steering angle detection value; a motor that generates steering assist torque assisting steering; and a controller that controls an output from the motor using a steering angle control value calculated on the basis of the steering angle detection value, wherein, when a vehicle travels through a first curve and a second curve which are different in cornering direction and which are sequentially provided, the controller determines whether the steering wheel is returned and the steering assist torque is decreased to a torque threshold value while the vehicle is running in the first curve, and if so, shifts the steering angle control value with respect to the steering angle detection value and starts the generation of the steering assist torque for the second curve before the steering angle detection value returns to a sensor median due to returning of the steering wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15)
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10. A steering assist method using a steering apparatus including a steering angle sensor that acquires a detected value of a steering angle of a steering wheel as a steering angle detection value;
- a motor that generates steering assist torque assisting steering; and
a controller that controls an output from the motor using a steering angle control value calculated on the basis of the steering angle detection value, the method comprising;determining, by using the controller, whether a vehicle travels through a first curve and a second curve which are different in cornering direction and which are sequentially provided; determining, by using the controller, whether the steering wheel is returned and the steering assist torque is decreased to a torque threshold value while the vehicle is running in the first curve, and if so, shifting the steering angle control value with respect to the steering angle detection value to start the generation of the steering assist torque for the second curve before the steering angle detection value returns to a sensor median due to returning of the steering wheel.
- a motor that generates steering assist torque assisting steering; and
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16. A mobile terminal comprising:
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an interface circuit connected to a steering angle sensor that acquires a detected value of a steering angle of a steering wheel as a steering angle detection value, and connected to a motor that generates steering assist torque assisting steering; and a controller that controls an output from the motor using a steering angle control value calculated on the basis of the steering angle detection value, wherein, when a vehicle travels through a first curve and a second curve which are different in cornering direction and which are sequentially provided, the controller determines whether the steering wheel is returned and the steering assist torque is decreased to a torque threshold value while the vehicle is running in the first curve, and if so, shifts the steering angle control value with respect to the steering angle detection value and starts the generation of the steering assist torque for the second curve before the steering angle detection value returns to a sensor median due to returning of the steering wheel.
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Specification