Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Reexamination Certificate
2005-05-10
2005-05-10
Zanelli, Michael J. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
C701S042000, C180S443000, C180S446000
Reexamination Certificate
active
06892120
ABSTRACT:
An electric power steering apparatus comprising a torque sensor for detecting the steering torque applied on the steering member of a vehicle; the first control unit for outputting the first control signal to drive a motor for steering assist, based on the steering torque detected by the torque sensor; the steering angle sensor for detecting the steering angle of the steering member; the norm steering unit for outputting a norm steering angle, based on a norm steering model which defines the relation between the steering torque and the norm steering angle; the second control unit for outputting the second control signal to drive the motor in order to reduce the difference between the norm steering angle outputted from the norm steering unit based on the steering torque and the detected steering angle; and the changing unit for switching between the first control signal and the second control signal, thereby being capable of switching between the driving at the steering torque determined regardless of the conditions of the road surface and the driving at the steering torque of the conventional steering assist.
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Gibson Eric M.
Koyo Seiko Co. Ltd.
Zanelli Michael J.
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