Vehicle speed dependent compensator for electric steering systems
First Claim
1. An electric power steering system comprising:
- an electric motor disposed in a vehicle to apply torque to a steerable wheel;
a vehicle speed sensor, said vehicle speed sensor generating a vehicle speed signal;
a controller coupled to said vehicle speed sensor and said electric motor;
wherein said controller generates a scheduled compensated torque command to said electric motor, said scheduled compensated torque command based on at least one of a torque command signal, a compensated torque command signal, and a blend of said torque command signal and said compensated torque command signal, wherein at least one of said torque command signal, said compensated torque command signal and said blend is based on said vehicle speed signal.
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Accused Products
Abstract
An electric power steering control system comprising: an electric motor disposed in a vehicle to apply torque to a steerable wheel; a torque sensor disposed in the vehicle for detecting a steering wheel torque and generating a torque signal indicative thereof; a vehicle speed sensor, the vehicle speed sensor generating a vehicle speed signal; a controller coupled to the torque sensor, the vehicle speed sensor and the electric motor. The controller generates a scheduled compensated torque command to the electric motor. The scheduled compensated torque command is based on at least one of: a torque command signal responsive to the torque signal; a compensated torque command signal; and a blend of the torque command signal and the compensated torque command signal. At least one of the torque command signal, the compensated torque command signal and the blend is based the vehicle speed signal.
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Citations
29 Claims
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1. An electric power steering system comprising:
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an electric motor disposed in a vehicle to apply torque to a steerable wheel;
a vehicle speed sensor, said vehicle speed sensor generating a vehicle speed signal;
a controller coupled to said vehicle speed sensor and said electric motor;
wherein said controller generates a scheduled compensated torque command to said electric motor, said scheduled compensated torque command based on at least one of a torque command signal, a compensated torque command signal, and a blend of said torque command signal and said compensated torque command signal, wherein at least one of said torque command signal, said compensated torque command signal and said blend is based on said vehicle speed signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of controlling an electric power steering system, the method comprising:
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receiving a torque command signal;
receiving a vehicle speed signal responsive to a speed of a vehicle; and
generating a scheduled compensated torque command, said scheduled compensated torque command based on at least one of said torque command signal, a compensated torque command signal, and a blend of said torque command signal and said compensated torque command signal, wherein at least one of said torque command signal, said compensated torque command signal and said blend is based on said vehicle speed signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A storage medium encoded with a machine-readable computer program code;
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said code including instructions for causing a computer to implement a method for controlling an electric power steering system, the method comprising;
receiving a torque command signal;
receiving a vehicle speed signal responsive to a speed of a vehicle; and
generating a scheduled compensated torque command, said scheduled compensated torque command based on at least one of said torque command signal, a compensated torque command signal, and a blend of said torque command signal and said compensated torque command signal, wherein at least one of said torque command signal, said compensated torque command signal and said blend is based on said vehicle speed signal.
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28. A computer data signal comprising:
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said computer data signal comprising code configured to cause a processor to implement a method for controlling an electric power steering system, the method comprising;
receiving a torque command signal;
receiving a vehicle speed signal responsive to a speed of a vehicle; and
generating a scheduled compensated torque command, said scheduled compensated torque command based on at least one of said torque command signal, a compensated torque command signal, and a blend of said torque command signal and said compensated torque command signal, wherein at least one of said torque command signal, said compensated torque command signal and said blend is based on said vehicle speed signal.
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29. An electric power steering control system comprising:
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a means for detecting a vehicle speed and generating a speed signal indicative thereof;
a means for receiving said torque command signal;
a means for receiving said vehicle speed signal;
a means for generating a scheduled compensated torque command, said scheduled compensated torque command based on at least one of said torque command signal, a compensated torque command signal, and a blend of said torque command signal and said compensated torque command signal, wherein at least one of said torque command signal, said compensated torque command signal and said blend is based on said vehicle speed signal.
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Specification