车辆工程毕业设计（论文）-电控液压动力转向系统设计.doc

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摘要
电控液压动力转向系统可解决汽车转向轻便性和灵敏性的矛盾,使驾驶员在汽车低速行驶时获得较大助力,高速行驶时获得较强的路感。
本次设计主要完成电控液压动力转向系统的液压部分和机械部分的设计。在设计中将车速信号和转向盘角速度信号引入液压转向系统,电子控制单元根据车速传感器和转向盘转角传感器检测的车速信号和转向信号,计算出电动机的对应的转速,对电动机转速进行控制,电动机驱动油泵,控制电动机转速从而控制油泵的泵油量,改变助力的大小。
文中一开始阐述了电控液压动力转向系统设计的目的和意义、发展状况以及应用前景。接着分析论述了总体设计方案,进行了液压动力系统、机械转向器等主要部件的方案分析和选择。
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关键词:动力转向;液压动力转向;助力转向;可变助力特性;电控液压动力转向;
ABSTRACT
Electronically controlled hydraulic power steering system(EPHS) to solve the car and light sensitivity of the contradictions so that the driver in the car at low speed on a larger
power, high-speed movements were strong sense of direction.
The main pleted electronically controlled hydraulic power steering system of hydraulic and mechanical parts of the this designation, speed signals and Zhuanxiang Pan angular velocity signal are introduced to the hydraulic steering system. According to the detected speed signal and the corner signal of Zhuanxiang Pan,electronic control units detect speed signals and the corner signal of Zhuanxiang Pan by the speed sensor type of assistance, and then calculate the corresponding rotational of motor,and control the rotational speed of motor,then control the oil flow of pump,in order to meet therequirements to light the requirements of handling and stability .
When expounded the start of a hydraulic power steering electronic control system design the purpose and significance of the development situation and prospects. And then analysis and choice its hydraulic power systems, mechanical steering gear and other major
components of the programme.
Keyword: Power Steering;Hydraulic Power Steering; Auxiliary Force; VariablePower Characteristics; Electronically Controlled Hydraulic Power steering
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