电子动力转向系统的研究和设计------外文翻译.doc

What it is:
Electrically powered steering uses an electric motor to drive either the power steering hydraulic pump or the steering linkage directly. The power steering function is therefore independent of engine speed, resulting in significant energy savings.
How it works :
Conventional power steering systems use an engine accessory belt to drive the pump, providing pressurized fluid that operates a piston in the power steering gear or actuator to assist the driver.
In electro-hydraulic steering, one electrically powered steering concept uses a high efficiency pump driven by an electric motor. Pump speed is regulated by an electric controller to vary pump pressure and flow, providing steering efforts tailored for different driving situations. The pump can be run at low speed or shut off to provide energy savings during straight ahead driving (which is most of the time in most world markets).
Direct electric steering uses an electric motor attached to the steering rack via a gear mechanism (no pump or fluid). A variety of motor types and gear drives is possible. A microprocessor controls steering dynamics and driver effort. Inputs include vehicle speed and steering, wheel torque, angular position and turning rate.



电子动力转向系统的工作原理：
电子动力转向系统是通过一个电动机来驱动动力方向盘液压泵或直接驱动转向联动装置。电子动力转向的功能由于不依赖于发动机转速，所以能节省能源。
电子动力转向系统的工作方式：
传统的动力方向盘系统使用一条引擎辅助传送带驾驶泵浦，提供操作在动力方向盘齿轮或动作器的一个活塞协助驱动的被加压的流体。
在电动液压的控制，一个电子动力方向盘包括一台电动机控制的一个高效率泵浦。由一个电控制器调控泵浦压力和流速来控制泵浦的速度，为不同的驾驶路况提供转向。泵浦可以在汽车行驶低速时打开或者在直线行驶时关闭以提供节能（在当代的世界市场上)。
电动控制转向使用电动机通过齿轮齿条机构直接连接以达到转向控制（无泵或液体）。多个电机驱动器和多驱动控制的实现是可能的。一个微处理器控制转向动态和驱动的工作。输入因子包括车速，转向，车轮扭矩，角度位置和转率。