Steer-by-wire system with first and second steering actuators
First Claim
1. A steer-by-wire system for a vehicle having a first road wheel capable of turning, a second road 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 road wheel and adapted to receive a first turning control signal and to adjust a turning angle of the first road 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 road wheel and adapted to receive a second turning control signal and to adjust a turning angle of the second road wheel, and a second turning sensor coupled to said second turning actuator and adapted to sense second turning factors 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 road wheel and to produce the second turning signal based on the steering facts, the second turning factors, and the vehicle factors thereby independently controlling the turning angle of the second road 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.
9 Citations
17 Claims
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1. A steer-by-wire system for a vehicle having a first road wheel capable of turning, a second road 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 road wheel and adapted to receive a first turning control signal and to adjust a turning angle of the first road 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 road wheel and adapted to receive a second turning control signal and to adjust a turning angle of the second road wheel, and a second turning sensor coupled to said second turning actuator and adapted to sense second turning factors 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 road wheel and to produce the second turning signal based on the steering facts, the second turning factors, and the vehicle factors thereby independently controlling the turning angle of the second road wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In a steer-by-wire system for a vehicle having a first road wheel capable of turning, a first turning actuator capable of adjusting the turning angle of the first road wheel, a second road wheel capable of turning, a second turning actuator capable of adjusting the turning angle of the second road wheel, and a steering device capable of receiving a steering input from a driver of a vehicle, a method of controlling the first road wheel and the second road 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 the current dynamic status of the vehicle;
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 road 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 road wheel. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification