Steer-by-wire system and method for actuating road wheels of a vehicle
First Claim
1. A steer-by-wire actuating system for actuating a first road wheel and a second road wheel of a vehicle, the system comprising:
- a microcontroller for controlling an actuation strategy including normal and fault modes of the steer-by-wire system, the microcontroller being configured to receive a steering signal indicative of steering input at a driver interface;
first and second power electronic drivers in electrical communication with the microcontroller for electric power; and
a first motor coupled with the first and second road wheels and a second motor coupled with the fist and second road wheels, the first motor being in electrical communication with the first power electronic driver to receive electric power therefrom, the second motor being in electrical communication with the second power electronic driver to receive electric power therefrom, the first and second motors configured to cooperate simultaneously to rotate the first road wheel during the normal mode, and the first and second motors configured to cooperate simultaneously to rotate the second road wheel during normal mode.
13 Assignments
0 Petitions
Accused Products
Abstract
The present invention involves a steer-by-wire actuating system and method of actuating road wheels of a vehicle with the steer-by-wire actuating system. The system includes a steering linkage assembly including an input shaft, an output shaft, and a gear unit linking the input shaft and the output shaft for linear movement of the output shaft to rotate the road wheels of the vehicle. The system further comprises a microcontroller for controlling an actuation strategy including normal and fault detection modes. The microcontroller is configured to receive a steering signal indicative of steering input at a steering interface. The system further includes first and second power electronic drivers in electrical communication with the microcontroller for electric power supply. The system further includes a first motor and a second motor for simultaneous operation with the steer-by-wire steering device. The first motor is in electrical communication with the first power electronic driver to receive electric power therefrom and the second motor is in electrical communication with the second power electronic driver to receive electric power therefrom. The first and second motors are connected to the input shaft for movement thereof to rotate the road wheels based on the steering signal. The first and second motors are configured to cooperate simultaneously to rotate the road wheels during the normal mode.
-
Citations
31 Claims
-
1. A steer-by-wire actuating system for actuating a first road wheel and a second road wheel of a vehicle, the system comprising:
-
a microcontroller for controlling an actuation strategy including normal and fault modes of the steer-by-wire system, the microcontroller being configured to receive a steering signal indicative of steering input at a driver interface;
first and second power electronic drivers in electrical communication with the microcontroller for electric power; and
a first motor coupled with the first and second road wheels and a second motor coupled with the fist and second road wheels, the first motor being in electrical communication with the first power electronic driver to receive electric power therefrom, the second motor being in electrical communication with the second power electronic driver to receive electric power therefrom, the first and second motors configured to cooperate simultaneously to rotate the first road wheel during the normal mode, and the first and second motors configured to cooperate simultaneously to rotate the second road wheel during normal mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of rotating road wheels of a vehicle with a steer-by wire system, the method comprising:
-
providing a steering linkage assembly including an input shaft electrically connected to a driver interface of the vehicle, an output shaft connected to road wheels of the vehicle, a gear unit linking the input and output shafts for linear movement of the output shaft to rotate the road wheels, and a first motor and a second motor for simultaneous operation with the steer-by-wire system having an actuating strategy including normal and fault detection modes;
receiving a steering signal indicative of steering input at the driver interface based on a predetermined steering ratio of the vehicle;
generating a first power to the first motor and a second power to the second motor based on the steering signal; and
simultaneously applying torque on the input shaft with the first and second motors to rotate the road wheels based on he steering signal and the first and second powers, each of the first power and the second power being a percentage of a required power to rotate the road wheels during the normal mode, wherein one of the first and second motors independently operates the steer-by-wire steering device to rotate the wheels during the fault mode. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
-
20. A steer-by-wire actuating system for actuating road wheels of a vehicle, the system comprising:
-
a steering linkage assembly including an input shaft electrically connected to a driver interface, an output shaft connected to the road wheels of the vehicle simultaneously rotating the road wheels, and a gear unit linking the input and output shafts for linear movement of the output shaft to rotate the road wheels;
a microcontroller for controlling an actuation strategy including normal and fault modes of the steer-by-wire system, the microcontroller configured to receive a steering signal indicative of steering input at the driver interface;
first and second power electronic drivers in electrical communication with the microcontroller for electric power; and
a first motor and a second motor for simultaneous operation with the steering linkage assembly, the first motor being in electrical communication with the first power electronic driver to receive electric power therefrom, the second motor being in electrical communication with the second power electronic driver to receive electric power therefrom, the first and second motors being connected to the input shaft for movement thereof to rotate the road wheels based on the steering signal, the first and second motors configured to cooperate simultaneously to rotate the road wheels during the normal mode. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
-
31. A steer-by-wire actuating system for actuating road wheels of a vehicle, the system comprising:
-
a steering linkage assembly including an input shaft electrically connected to a driver interface, an output shaft connected to the road wheels of the vehicle, and a gear unit linking the input and output shafts for linear movement of the output shaft to rotate the road wheels;
a microcontroller for controlling an actuation strategy including normal and fault modes of the steer-by-wire system, the microcontroller configured to receive a steering signal indicative of steering input at the driver interface;
first and second power electronic drivers in electrical communication with the microcontroller for electric power; and
a first motor and a second motor for simultaneous operation with the steering linkage assembly, the first motor being in electrical communication with the first power electronic driver to receive electric power therefrom, the second motor being in electrical communication with the second power electronic driver to receive electric power therefrom, the first and second motors being connected to the input shaft for movement thereof to rotate the road wheels based on the steering signal, the first and second motors configured to cooperate simultaneously to rotate the road wheels during the normal mode;
the first motor providing a first power and the second motor providing a second power, each of the first and second powers being a percentage of a required power to rotate the road wheels during the normal mode, the first and second motors simultaneously operating to provide a combined power greater than the required power to rotate the road wheels.
-
Specification