Motor vehicles – Steering gear – With electric power assist
Reexamination Certificate
2005-10-04
2005-10-04
Boehler, Anne Marie (Department: 3611)
Motor vehicles
Steering gear
With electric power assist
C073S862333, C180S444000, C702S043000, C702S151000
Reexamination Certificate
active
06951261
ABSTRACT:
A power steering system includes a torsion bar, which is twistable around its axis for an amount corresponding to a steering torque applied to a steering shaft, a torque sensor, an electric motor, which is driven through a drive circuit to provide the steering shaft with steering assisting force, and motor control means for obtaining a steering torque from a digital signal transmitted from sensor and outputting a drive Duty signal to the drive circuit so that a current suitable for the steering torque is supplied to the electric motor. The torque sensor includes a permanent magnet, a magnetic body, and a Hall IC having a galvanomagnetic element, an AD converter circuit, and a serial communication circuit for digital communications with the motor control means through a communication line and a power supply ground line.
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Boehler Anne Marie
Denso Corporation
Posz Law Group , PLC
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