Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Reexamination Certificate
2006-02-14
2006-02-14
Camby, Richard M. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
C701S042000, C180S446000
Reexamination Certificate
active
06999862
ABSTRACT:
An electric power steering apparatus has a motor controlled so as to generate steering assist power according to the steering torque required to operate a steering wheel. As a result of correction of the output of the motor in accordance with a value correlating with the rotation angular velocity correspondence value of the steering wheel, in the frequency response characteristic represented by the steering frequency of the steering wheel and the amplitude ratio of the steering torque relative to the steering angle of the steering wheel, the amplitude ratio is set within a setting range, at least within the steering frequency range when a person operates the steering wheel. As a result of correction of the output of the motor in accordance with a value directly correlating with the change velocity correspondence value of the steering torque, in the frequency response characteristic represented by the frequency of the disturbance torque input from the road surface to the steering system via vehicle wheels and the amplitude ratio of the steering torque relative to the disturbance torque, the amplitude ratio becomes smaller at the resonance frequency.
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Aono Shinya
Tamaizumi Terutaka
Camby Richard M.
Favess Co. Ltd.
Jordan and Hamburg LLP
Koyo Seiko Co. Ltd.
Toyoda Koki Kabushiki Kaisha
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