Patent ID: 6161644
Filing Date: 2000-12-19
Classification: B62D

Abstract:
A power steering system for a motor vehicle, having an input shaft which is centrally arranged in a housing, a torsion bar which is connected to an inside of the input shaft, a pinion shaft which is connected to a lower end of the input shaft and a valve body which is fitted around a circumferential outer surface of the input shaft, the power steering system obtaining steering assistant force by creating fluid flow, the power steering system comprising:an inner toothed member fitted around the circumferential outer surface of the input shaft and having a plurality of teeth which are formed on a lower half of the inner toothed member;an outer toothed member having a plurality of teeth which are formed on a circumferential inner surface of the outer toothed member in a manner such that they face the plurality of teeth of the inner toothed member;a coil wound through a plurality of turns in a circumferential direction and above the plurality of teeth of the inner and outer toothed members;a pass plate surrounding an upper surface and a circumferential outer surface of the coil, for rendering aid to a formation of magnetic paths;a permanent magnet fitted around the outer toothed member;a magnetic pole piece sleeve fitted around the permanent magnet; anda non-magnetic pole piece sleeve arranged under the inner toothed member, the outer toothed member and the permanent magnet, the permanent magnet and the outer toothed member having a same one polarity, the inner toothed member having an opposite polarity.