Patent ID: 7819217
Filing Date: 2010-10-26
Classification: B62D

Abstract:
1. A power steering apparatus comprising: a steering shaft adapted to be connected to a steering wheel, the steering shaft comprising a first shaft and a second shaft; a hydraulic power cylinder mechanically linked to the steering shaft, the hydraulic power cylinder having first and second fluid pressure chambers for producing an assist steering effort; a hydraulic pump for supplying a fluid pressure to the hydraulic power cylinder; a steering shaft actuator for controlling the steering shaft, the steering shaft actuator comprising a first actuator and a second actuator; a condition sensor for collecting information concerning at least one of an associated host vehicle, an associated driver and an associated road; and a fluid pressure controller for receiving the collected information from the condition sensor, and controlling the steering shaft actuator based on the collected information, wherein the first actuator comprises: the second actuator comprises: