Assist modification in active front steering
First Claim
1. An active steering system with variable assist comprising:
- a motor operatively coupled to a differential actuator;
said differential actuator configured to translate motion of a hand wheel input into motion of an output shaft, wherein said motion of said output shaft is further responsive to said motor and wherein said output shaft is coupled to a road wheel of said steering system;
an assist mechanism operatively coupled to said differential actuator and said road wheel of said steering system to provide an assist torque responsive to said motion of said output shaft;
a controller in operable communication with said assist mechanism and said vehicle speed sensor, said controller generating an assist command responsive to receiving an input signal, said input signal including at least one of a variable ratio command signal, a stability command signal, a hand wheel position signal, a vehicle speed signal indicative of a speed of said vehicle, a signal indicative of an operator selected function, and a signal indicative a vehicle operating mode.
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Accused Products
Abstract
Disclosed herein in an exemplary embodiment is a method for providing variable assist in an active steering system of a vehicle. The method comprises: receiving an input signal that includes at least one of, a variable ratio command signal, a stability command signal, a hand wheel position signal, a vehicle speed signal indicative of a speed of the vehicle, a signal indicative of an operator selected function, and a signal indicative a vehicle operating mode. The method also comprises: generating an assist command to an assist mechanism responsive to the input signal wherein the assist mechanism is operatively coupled to the differential actuator and a road wheel of the steering system to provide an assist torque responsive to the motion of the output shaft. The active steering system includes a hand wheel operatively coupled to an input of a differential actuator and a motor operatively coupled to the differential actuator. The differential actuator is configured to translate motion of the input into motion of the output shaft, where the motion of the output shaft is further responsive to the motor and wherein the output shaft is coupled to the road wheel of the steering system.
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Citations
22 Claims
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1. An active steering system with variable assist comprising:
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a motor operatively coupled to a differential actuator;
said differential actuator configured to translate motion of a hand wheel input into motion of an output shaft, wherein said motion of said output shaft is further responsive to said motor and wherein said output shaft is coupled to a road wheel of said steering system;
an assist mechanism operatively coupled to said differential actuator and said road wheel of said steering system to provide an assist torque responsive to said motion of said output shaft;
a controller in operable communication with said assist mechanism and said vehicle speed sensor, said controller generating an assist command responsive to receiving an input signal, said input signal including at least one of a variable ratio command signal, a stability command signal, a hand wheel position signal, a vehicle speed signal indicative of a speed of said vehicle, a signal indicative of an operator selected function, and a signal indicative a vehicle operating mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for providing variable assist in an active steering system of a vehicle comprising:
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receiving an input signal, said input signal including at least one of a variable ratio command signal, a stability command signal, a hand-wheel position signal, a vehicle speed signal indicative of a speed of said vehicle, a signal indicative of an operator selected function, and a signal indicative a vehicle operating mode;
generating an assist command to an assist mechanism responsive to said input signal, wherein said assist mechanism is operatively coupled to said differential actuator and a road wheel of said steering system to provide an assist torque responsive to said motion of said output shaft; and
wherein said active steering system includes a hand wheel operatively coupled to an input of a differential actuator and a motor operatively coupled to said differential actuator;
said differential actuator configured to translate motion of said input into motion of said output shaft, wherein said motion of said output shaft is further responsive to said motor and wherein said output shaft is coupled to said road wheel of said steering system. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A storage medium:
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encoded with a machine readable computer program code;
said code including instructions for causing a computer to implement a method for providing variable assist in an active steering system of a vehicle, the method comprising;
receiving an input signal, said input signal including at least one of a variable ratio command signal, a stability command signal, a hand wheel position signal, a vehicle speed signal indicative of a speed of said vehicle, a signal indicative of an operator selected function, and a signal indicative a vehicle operating mode;
generating an assist command to an assist mechanism responsive to said input signal, wherein said assist mechanism is operatively coupled to said differential actuator and a road wheel of said steering system to provide an assist torque responsive to said motion of said output shaft; and
wherein said active steering system includes a hand wheel operatively coupled to an input of a differential actuator and a motor operatively coupled to said differential actuator;
said differential actuator configured to translate motion of said input into motion of said output shaft, wherein said motion of said output shaft is further responsive to said motor and wherein said output shaft is coupled to said road wheel of said steering system.
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22. A computer data signal, said computer data signal comprising:
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instructions for causing a computer to implement a method for providing variable assist in an active steering system of a vehicle, the method comprising;
receiving an input signal, said input signal including at least one of a variable ratio command signal, a stability command signal, a hand wheel position signal, a vehicle speed signal indicative of a speed of said vehicle, a signal indicative of an operator selected function, and a signal indicative a vehicle operating mode;
generating an assist command to an assist mechanism responsive to said input signal, wherein said assist mechanism is operatively coupled to said differential actuator and a road wheel of said steering system to provide an assist torque responsive to said motion of said output shaft; and
wherein said active steering system includes a hand wheel operatively coupled to an input of a differential actuator and a motor operatively coupled to said differential actuator;
said differential actuator configured to translate motion of said input into motion of said output shaft, wherein said motion of said output shaft is further responsive to said motor and wherein said output shaft is coupled to said road wheel of said steering system.
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Specification