Steer-by-wire system with first and second steering actuators
First Claim
1. A steer-by-wire system for a vehicle having a first front wheel capable of turning, a second front wheel capable of turning, and a steering device capable of receiving a steering input from a driver of the vehicle, comprising:
- a steering sensor coupled to the steering device and adapted to sense steering factors of the steering input;
a turning subsystem including a first turning actuator coupled to the first front wheel and adapted to receive a first turning control signal and to adjust a turning angle of the first front wheel, a first turning sensor coupled to said first turning actuator and adapted to sense first turning factors of said first turning actuator, a second turning actuator coupled to the second front wheel and adapted to receive a second turning control signal end to adjust a turning angle of the second front wheel, and a second turning sensor coupled to said second turning actuator and adapted to sense second turning factors of said second turning actuator, said turning first factors include a current draw of said first actuator and a temperature of said first actuator, said second turning factors include a current draw of said second turning actuator and a temperature of said second turning actuator;
a vehicle sensor coupled to the vehicle and adapted to sense vehicle factors of the vehicle; and
a controller subsystem connected to said steering sensor, to said first turning sensor, to said second turning sensor, and to said vehicle sensor, and adapted to produce the first turning signal based on the steering factors, the first turning factors, and the vehicle factors thereby controlling the turning angle of the first front wheel and to produce the second turning signal based on the steering factors, the second turning factors, and the vehicle factors thereby independently controlling the turning angle of the second front wheel.
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Accused Products
Abstract
A steer-by-wire system of the preferred embodiment of the invention includes a steering sensor, a turning subsystem, a vehicle sensor, and a controller subsystem. The turning subsystem further includes a first turning actuator to adjust a turning angle of a first road wheel, a first turning sensor to sense first turning factors of the first turning actuator, a second turning actuator to adjust a turning angle of a second road wheel, and a second turning sensor to sense second turning factors of the second turning actuator. The controller subsystem is connected to the steering sensor, to the first turning sensor, to the second turning sensor, and to the vehicle sensor. The control subsystem independently controls the first turning actuator and the second turning actuator.
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Citations
13 Claims
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1. A steer-by-wire system for a vehicle having a first front wheel capable of turning, a second front wheel capable of turning, and a steering device capable of receiving a steering input from a driver of the vehicle, comprising:
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a steering sensor coupled to the steering device and adapted to sense steering factors of the steering input;
a turning subsystem including a first turning actuator coupled to the first front wheel and adapted to receive a first turning control signal and to adjust a turning angle of the first front wheel, a first turning sensor coupled to said first turning actuator and adapted to sense first turning factors of said first turning actuator, a second turning actuator coupled to the second front wheel and adapted to receive a second turning control signal end to adjust a turning angle of the second front wheel, and a second turning sensor coupled to said second turning actuator and adapted to sense second turning factors of said second turning actuator, said turning first factors include a current draw of said first actuator and a temperature of said first actuator, said second turning factors include a current draw of said second turning actuator and a temperature of said second turning actuator;
a vehicle sensor coupled to the vehicle and adapted to sense vehicle factors of the vehicle; and
a controller subsystem connected to said steering sensor, to said first turning sensor, to said second turning sensor, and to said vehicle sensor, and adapted to produce the first turning signal based on the steering factors, the first turning factors, and the vehicle factors thereby controlling the turning angle of the first front wheel and to produce the second turning signal based on the steering factors, the second turning factors, and the vehicle factors thereby independently controlling the turning angle of the second front wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a steer-by-wire system for a vehicle having a first front wheel capable of turning, a first turning actuator capable of adjusting the turning angle of the first front wheel, a second front wheel capable of turning, a second turning actuator capable of adjusting the turning angle of the second front wheel, and a steering device capable of receiving a steering input from a driver of a vehicle, a method of controlling the first front wheel and the second front wheel comprising:
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sensing steering factors of the steering input and determining the steering intent of the driver;
sensing vehicle factors of the vehicle, sensing first turning factors of the first turning actuator, sensing second turning factors of the second turning actuator;
determining a current dynamic status of the vehicle, said sensing first turning factors includes sensing a current draw of the first turning actuator and sensing a temperature of the first turning actuator, said second turning factors include sensing a current draw of the second turning actuator and sensing a temperature of the second turning actuator;
comparing the steering intent and the current dynamic status;
producing a first turning control signal for the first turning actuator based on the steering factors, the vehicle factors, and the first turning factors to control the turning angle of the first front wheel; and
producing a second turning control signal for the second turning actuator based on the steering factors, the vehicle factors, and the second turning factors to independently control the turning angle of the second front wheel. - View Dependent Claims (10, 11, 12, 13)
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Specification