Motor vehicles – Steering gear – With electric power assist
Reexamination Certificate
2011-08-09
2011-08-09
Winner, Tony H. (Department: 3611)
Motor vehicles
Steering gear
With electric power assist
Reexamination Certificate
active
07992672
ABSTRACT:
An electric power steering system includes a steering wheel, a rack-and-pinion type steering gear box connected to the steering wheel, a steering torque sensor, a pinion shaft, and a steering actuator mounted on the pinion shaft to assist a steering operation conducted by a driver. An overload preventing control is conducted so that a sum of a current conversion value of a steering torque detected by the steering torque sensor and an assist current calculated based on the steering torque becomes equal to a limit value. When the steering gear box has reached a stroke end, the assist current is prevented from excessively increasing, thereby preventing a reduction in durability of the steering gear box or a motor of the steering actuator.
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Arent & Fox LLP
Honda Motor Co. Ltd.
Potter Wesley
Winner Tony H.
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