Motor-driven power steering apparatus

Details Motor-driven power steering apparatus Motor-driven power steering apparatus

1997-04-25

1999-05-25

Hurley, Kevin

Motor vehicles

Steering gear

With electric power assist

180446, B62D 504

Patent

active

059062509

ABSTRACT:
An electric power steering apparatus comprises an input shaft transmitting a rotation from a steering wheel and an output shaft rotatably connected to the input shaft through a torsion bar relative to the input shaft. A drive motor is coaxially arranged relative to both of the input shaft and the output shaft. A reduction mechanism coaxially provided in a housing relative to the input and output shaft transmits a rotation of the drive motor to the output shaft so as to reduce the rotation of the drive motor at a constant reduction rate. A torque sensor detects a torque added to the torsion bar as a relative rotational displacement between the input shaft and the output shaft. The drive motor is rotationally controlled in accordance with the detected torque by the torque sensor.

REFERENCES:
patent: 4681181 (1987-07-01), Shimizu
patent: 4688655 (1987-08-01), Shimizu
patent: 4727950 (1988-03-01), Shimizu et al.
patent: 4756376 (1988-07-01), Shimizu

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