| 摘要 |
<p>An electric power steering apparatus comprises a steering shaft including a torsion bar to join an input shaft on the side of a steering wheel and an output shaft on the side of a steering road wheel so that they can be rotationally displaced relative to each other, and a non-contact type sensor using a Hall effect device provided in association with the input and output shafts to sense a relative rotational displacement based on a torsion of the torsion bar. The electric power steering apparatus further comprises an electric motor provided around a steering gear body within which the steering shaft is disposed and is driven by a signal from the non-contact type sensor to render a steering assistance to an output shafting leading to the steering road wheel. Thus, this can provide a power steering apparatus of simple and inexpensive structure to prevent that the reliability is lowered when used for a long timer or subject to environment changes, thus eliminating the troublesomeness in the adjustment work therefor. Further, this novel apparatus utilizes the sense function of the non-contact type sensor, thereby making it possible to provide a proper and smooth steering assistance effort conforming to running conditions of a vehicle, resulting in high performance of the power steering apparatus.</p> |
